/* ============================================
   CSS Variables
   ============================================ */
:root {
  /* Colors - Dark Theme (default) */
  --bg-primary: #1a1a2e;
  --bg-secondary: #16213e;
  --bg-tertiary: #0f3460;
  --bg-card: #1f2937;

  --text-primary: #f5f5f5;
  --text-secondary: #a0aec0;
  --text-muted: #718096;

  --accent-primary: #4ade80;
  --accent-primary-rgb: 74, 222, 128;
  --accent-secondary: #22d3ee;
  --accent-warning: #fbbf24;
  --accent-danger: #ef4444;
  --border-color: #374151;
  --border-radius: 8px;
  --border-radius-lg: 12px;

  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --font-mono: 'SF Mono', Monaco, 'Courier New', monospace;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.4);

  /* Layout */
  --header-height: 56px;
  --max-width: 1200px;
}

/* Light Theme */
[data-theme="light"] {
  --bg-primary: #f5f5f5;
  --bg-secondary: #e8e8e8;
  --bg-tertiary: #d5d5d5;
  --bg-card: #ffffff;

  --text-primary: #1a1a2e;
  --text-secondary: #4a5568;
  --text-muted: #718096;

  --accent-primary: #059669;
  --accent-secondary: #0891b2;
  --accent-warning: #d97706;
  --accent-danger: #dc2626;

  --border-color: #d1d5db;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.15);
}

/* ============================================
   Reset & Base
   ============================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  overflow-x: hidden;
}

a {
  color: var(--accent-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-primary);
}

button {
  font-family: inherit;
  cursor: pointer;
}

input,
select,
textarea {
  font-family: inherit;
  font-size: 1rem;
}

img {
  max-width: 100%;
  height: auto;
}

.hidden {
  display: none !important;
}

/* ============================================
   Layout
   ============================================ */
#app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  z-index: 100;
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  height: 100%;
}

.header-left {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.header-center-mobile {
  display: none;
}

.main {
  flex: 1;
  margin-top: var(--header-height);
  padding: var(--spacing-lg);
}

/* ============================================
   Logo & Navigation
   ============================================ */
.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.25rem;
  text-decoration: none;
}

.logo-text {
  font-family: 'Segoe UI', 'Helvetica Neue', sans-serif;
  font-weight: 700;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, var(--accent-primary), #22B379);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.nav {
  display: flex;
  gap: var(--spacing-lg);
}

.nav-link {
  color: var(--text-secondary);
  font-weight: 500;
  padding: var(--spacing-sm) 0;
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
  border-color: var(--accent-primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.hamburger-menu {
  display: none !important;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  gap: 5px;
  transition: all var(--transition-fast);
  margin: 0 4px;
}

.hamburger-menu:hover {
  opacity: 0.8;
}

.hamburger-menu span {
  width: 24px;
  height: 2.5px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s cubic-bezier(0.4, 0.0, 0.2, 1);
  transform-origin: center;
}

.hamburger-menu.active span:nth-child(1) {
  transform: rotate(45deg) translate(8px, 8px);
}

.hamburger-menu.active span:nth-child(2) {
  opacity: 0;
  transform: scale(0.8);
}

.hamburger-menu.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

/* Mobile Navigation Drawer - Hidden on Desktop */
.mobile-nav-drawer {
  display: none !important;
  position: absolute;
  top: var(--header-height);
  left: 0;
  right: 0;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  flex-direction: column;
  z-index: 99;
  max-height: calc(100vh - var(--header-height));
  overflow-y: auto;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  border-radius: 0 0 var(--border-radius) var(--border-radius);
}

.mobile-nav-drawer.open {
  display: flex !important;
  animation: slideDownMenuModern 0.2s cubic-bezier(0.4, 0.0, 0.2, 1) forwards;
}

.mobile-nav-drawer.open::before {
  content: '';
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: -1;
  animation: fadeInOverlay 0.2s ease forwards;
  pointer-events: none;
}

@keyframes slideDownMenuModern {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInOverlay {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

.mobile-nav-content {
  display: flex;
  flex-direction: column;
  padding: var(--spacing-xs) 0;
  background: var(--bg-secondary);
  position: relative;
  z-index: 1;
}

.mobile-nav-link {
  display: block;
  padding: var(--spacing-md) var(--spacing-lg);
  color: var(--text-secondary);
  background: transparent;
  border: none;
  border-left: 3px solid transparent;
  font-weight: 500;
  font-size: 1rem;
  transition: all 0.2s ease;
  position: relative;
  text-decoration: none;
}

.mobile-nav-link:first-child {
  border-radius: 0;
}

.mobile-nav-link:last-child {
  border-radius: 0 0 var(--border-radius) 0;
}

.mobile-nav-link:hover {
  background: rgba(var(--accent-primary-rgb), 0.08);
  color: var(--accent-primary);
  border-left-color: var(--accent-primary);
}

.mobile-nav-link.active {
  background: rgba(var(--accent-primary-rgb), 0.12);
  color: var(--accent-primary);
  border-left-color: var(--accent-primary);
  font-weight: 600;
}

/* Show/hide icons based on theme */
.theme-icon-light {
  display: none;
}

[data-theme="light"] .theme-icon-dark {
  display: none;
}

[data-theme="light"] .theme-icon-light {
  display: inline;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 0.875rem;
  font-weight: 600;
  border: none;
  border-radius: var(--border-radius);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--accent-primary);
  color: var(--bg-primary);
}

.btn-primary:hover:not(:disabled) {
  background: #3ecf70;
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--bg-secondary);
  color: var(--text-primary);
  transform: translateY(-1px);
}

.btn-success {
  background: var(--accent-primary);
  color: var(--bg-primary);
}

.btn-danger {
  background: var(--accent-danger);
  color: white;
}

.btn-danger:hover:not(:disabled) {
  background: #dc2626;
}

.btn-warning {
  background: #f59e0b;
  color: #000;
}

.btn-warning:hover:not(:disabled) {
  background: #d97706;
}

.btn-link {
  background: transparent;
  color: var(--accent-secondary);
  padding: 0;
}

.btn-link:hover {
  color: var(--accent-primary);
}

.btn-sm {
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 0.8125rem;
}

.btn-lg {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1rem;
}

.btn-block {
  width: 100%;
}

.auth-buttons {
  display: flex;
  gap: var(--spacing-sm);
}

/* ============================================
   User Menu
   ============================================ */
.user-menu {
  position: relative;
}

.user-button {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  color: var(--text-primary);
}

.user-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--bg-tertiary);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: var(--spacing-xs);
  min-width: 160px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition-fast);
}

.user-menu:hover .dropdown-menu,
.dropdown-menu:hover,
.dropdown-menu.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  display: block;
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  color: var(--text-secondary);
  background: transparent;
  border: none;
  transition: all var(--transition-fast);
}

.dropdown-item:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.dropdown-item-danger {
  color: var(--accent-danger);
}

.dropdown-item-danger:hover {
  background: rgba(239, 68, 68, 0.1);
  color: var(--accent-danger);
}

.dropdown-divider {
  height: 1px;
  background: var(--border-color);
  margin: var(--spacing-xs) 0;
}

/* Dropdown User Info Section */
.dropdown-user-info {
  display: none;
  /* Hidden on desktop, shown on mobile */
  padding: var(--spacing-sm) var(--spacing-md);
}

.dropdown-divider-mobile {
  display: none;
  /* Hidden on desktop, shown on mobile */
}

.dropdown-username {
  display: block;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
}

/* Dropdown Toggle Items (Theme/Sound) */
.dropdown-toggles {
  padding: var(--spacing-xs) 0;
}

.dropdown-toggle-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.dropdown-toggle-item:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.dropdown-toggle-item .toggle-icon {
  font-size: 1rem;
  width: 20px;
  text-align: center;
}

.dropdown-toggle-item .toggle-label,
.dropdown-toggle-item .toggle-label-light,
.dropdown-toggle-item .toggle-label-on {
  flex: 1;
  text-align: left;
}

/* Theme toggle label visibility */
.dropdown-toggle-item .toggle-label-light,
.dropdown-toggle-item .theme-icon-light {
  display: none;
}

[data-theme="light"] #dropdown-theme-toggle .toggle-label {
  display: none;
}

[data-theme="light"] #dropdown-theme-toggle .toggle-label-light {
  display: block;
}

[data-theme="light"] #dropdown-theme-toggle .theme-icon-dark {
  display: none;
}

[data-theme="light"] #dropdown-theme-toggle .theme-icon-light {
  display: inline;
}

/* Sound toggle label visibility */
.dropdown-toggle-item .toggle-label-on,
.dropdown-toggle-item .sound-icon-enabled {
  display: none;
}

.dropdown-toggle-item[data-sound="on"] .toggle-label {
  display: none;
}

.dropdown-toggle-item[data-sound="on"] .toggle-label-on {
  display: block;
}

.dropdown-toggle-item[data-sound="on"] .sound-icon-muted {
  display: none;
}

.dropdown-toggle-item[data-sound="on"] .sound-icon-enabled {
  display: inline;
}

/* ============================================
   Forms
   ============================================ */
.form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.form-group label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  color: var(--text-primary);
  transition: border-color var(--transition-fast);
  box-sizing: border-box;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
}

.select {
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  color: var(--text-primary);
  cursor: pointer;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
}

.checkbox-label input {
  width: 18px;
  height: 18px;
  accent-color: var(--accent-primary);
}



/* ============================================
   Cards
   ============================================ */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
}

/* ============================================
   Home Page
   ============================================ */
.home {
  max-width: var(--max-width);
  margin: 0 auto;
}

.hero {
  text-align: center;
  padding: var(--spacing-2xl) 0;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
}

.hero-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

.topics-preview {
  margin-top: var(--spacing-2xl);
}

.topics-preview h2 {
  margin-bottom: var(--spacing-lg);
}

/* Featured Topics Section */
.featured-topics {
  margin-top: var(--spacing-2xl);
  padding: var(--spacing-lg);
  background: linear-gradient(135deg, rgba(var(--accent-primary-rgb, 99, 102, 241), 0.08), rgba(var(--accent-secondary-rgb, 139, 92, 246), 0.08));
  border-radius: var(--border-radius-lg);
  border: 1px solid rgba(var(--accent-primary-rgb, 99, 102, 241), 0.2);
}

.featured-topics.hidden {
  display: none;
}

.featured-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xs);
}

.featured-header h2 {
  margin: 0;
  font-size: 1.5rem;
}

.featured-badge {
  background: var(--accent-primary);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.featured-subtitle {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  font-size: 0.95rem;
}

.featured-topics .topics-grid {
  margin-bottom: 0;
}



/* Featured badge on topic cards */
.topic-card.featured {
  border: 2px solid var(--accent-primary);
  position: relative;
}



.topic-card.featured::before {
  content: '✨ Featured';
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  background: var(--accent-primary);
  color: white;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
}

.topics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--spacing-md);
}

.topics-grid.large {
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--spacing-md);
}

/* ============================================
   Topics Page - Redesigned
   ============================================ */
.topics-page {
  max-width: 1400px;
  margin: 0 auto;
}

.topics-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
}

.topics-header h1 {
  margin: 0;
  font-size: 2rem;
}

.topics-subtitle {
  color: var(--text-muted);
  margin: var(--spacing-xs) 0 0 0;
}



.stat-pill.highlight {
  background: linear-gradient(135deg, var(--accent-primary)20, var(--accent-secondary)20);
}



.stat-pill .stat-value {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}



.stat-pill .stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Topics Toolbar */
.topics-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
  align-items: center;
}

.topics-search {
  position: relative;
  flex: 1;
  min-width: 250px;
  max-width: 400px;
}

.topics-search .search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1rem;
  pointer-events: none;
}

.topics-search .input {
  padding-left: 40px;
  padding-right: 36px;
}

.topics-search .search-clear {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  font-size: 1.25rem;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px 8px;
  line-height: 1;
}

.topics-search .search-clear:hover {
  color: var(--text-primary);
}

.topics-filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  align-items: center;
}

.filter-tabs {
  display: flex;
  background: var(--bg-tertiary);
  border-radius: var(--border-radius);
  padding: 3px;
}

.filter-tab {
  padding: 6px 14px;
  border: none;
  background: none;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  border-radius: calc(var(--border-radius) - 2px);
  transition: all var(--transition-fast);
}

.filter-tab:hover {
  color: var(--text-primary);
}

.filter-tab.active {
  background: var(--bg-card);
  color: var(--text-primary);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.select-sm {
  padding: 6px 12px;
  font-size: 0.875rem;
  min-width: 140px;
}

/* Topics Sections */
.topics-content {
  margin-top: var(--spacing-lg);
}

.topics-section {
  margin-bottom: var(--spacing-2xl);
}

.topics-section-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--border-color);
}

.topics-section-title .section-icon {
  font-size: 1rem;
}

.topics-section-title .section-count {
  margin-left: auto;
  background: var(--bg-tertiary);
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
}

.topics-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-2xl);
  background: var(--bg-tertiary);
  border-radius: var(--border-radius-lg);
  text-align: center;
}

.topics-empty .empty-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
}

.topics-empty p {
  color: var(--text-muted);
  margin: 0;
}

.topics-no-results {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-2xl);
  text-align: center;
}

.topics-no-results .no-results-icon {
  font-size: 4rem;
  margin-bottom: var(--spacing-md);
  opacity: 0.5;
}

.topics-no-results h3 {
  margin: 0 0 var(--spacing-sm) 0;
}

.topics-no-results p {
  color: var(--text-muted);
  margin: 0 0 var(--spacing-lg) 0;
}

.topics-load-more-container {
  display: flex;
  justify-content: center;
  padding: var(--spacing-xl) 0;
  grid-column: 1 / -1;
}

.topics-load-more {
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: 0.95rem;
  font-weight: 500;
}

/* Topic Cards - Minimal Design */
.topic-card {
  display: flex;
  flex-direction: column;
  padding: var(--spacing-md);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  min-height: 120px;
}

.topic-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.topic-card-body {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  flex: 1;
}

.topic-card-title-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.topic-icon-inline {
  font-size: 1.25rem;
  line-height: 1;
  flex-shrink: 0;
}

.topic-card-title {
  font-size: 0.9375rem;
  font-weight: 600;
  margin: 0;
  line-height: 1.3;
  flex: 1;
}

.topic-card-link {
  color: inherit;
  text-decoration: none;
}

.topic-card-link:hover {
  text-decoration: underline;
}

.topic-card-desc {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.topic-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: auto;
  padding-top: var(--spacing-xs);
  gap: var(--spacing-sm);
}

.topic-card-meta {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.topic-card-meta .meta-item {
  white-space: nowrap;
}



.topic-card-meta .meta-dot {
  opacity: 0.5;
}

.topic-card-badges {
  display: flex;
  align-items: center;
  gap: 4px;
}

.topic-multiplier {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--accent-secondary)20;
  color: var(--accent-secondary);
  white-space: nowrap;
}

/* Topic Info - Legacy support */
.topic-info h3 {
  font-size: 1rem;
  margin-bottom: var(--spacing-xs);
}

.topic-info p {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* Responsive Topics Page */
@media (max-width: 768px) {
  .topics-header {
    flex-direction: column;
    align-items: stretch;
  }

  .topics-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .topics-search {
    max-width: none;
  }

  .topics-filters {
    justify-content: center;
  }

  .filter-tabs {
    width: 100%;
    justify-content: center;
  }

  .topics-grid.large {
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  }
}

@media (max-width: 480px) {
  .topics-grid.large {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  }



  .stat-pill .stat-value {
    font-size: 1rem;
  }

  .topic-card {
    min-height: 100px;
  }
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-2xl);
  padding: var(--spacing-xl) 0;
}

.feature {
  text-align: center;
  padding: var(--spacing-lg);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
}

.feature h3 {
  margin-bottom: var(--spacing-sm);
}

.feature p {
  color: var(--text-secondary);
}

/* ============================================
   Auth Pages
   ============================================ */
.auth-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - var(--header-height) - var(--spacing-lg) * 2);
}

.auth-card {
  width: 100%;
  max-width: 400px;
  padding: var(--spacing-xl);
  background: var(--bg-card);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
}

.auth-card h1 {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.auth-footer {
  margin-top: var(--spacing-lg);
  text-align: center;
  color: var(--text-secondary);
}

/* Alert messages */
.alert {
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  font-size: 0.875rem;
  margin-bottom: var(--spacing-md);
}

.alert-warning {
  background: rgba(255, 193, 7, 0.15);
  border: 1px solid rgba(255, 193, 7, 0.3);
  color: var(--accent-warning);
}

/* Login CAPTCHA container */
#login-captcha {
  display: flex;
  justify-content: center;
  margin: var(--spacing-md) 0;
}

.login-warning {
  margin-bottom: var(--spacing-md);
}

.form-note {
  margin-top: var(--spacing-md);
  padding: var(--spacing-sm);
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-align: center;
}

.verify-email-content {
  text-align: center;
}

.verify-email-content p {
  margin-bottom: var(--spacing-md);
}

.verify-email-note {
  margin: var(--spacing-lg) 0;
  padding: var(--spacing-md);
  background: var(--bg-tertiary);
  border-radius: var(--border-radius);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* CAPTCHA container styling */
#register-captcha,
#forgot-password-captcha {
  display: flex;
  justify-content: center;
  margin: var(--spacing-md) 0;
  min-height: 78px;
  /* Prevent layout shift */
}

/* ============================================
   Lobby
   ============================================ */
.lobby {
  max-width: 1000px;
  margin: 0 auto;
}

.lobby-content {
  display: flex;
  gap: var(--spacing-xl);
  align-items: flex-start;
}

.lobby-main {
  flex: 1;
  min-width: 0;
}

.lobby-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.room-header-line {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.room-header-line h1 {
  margin: 0;
}

.room-code {
  color: var(--accent-primary);
  font-size: inherit;
  font-weight: 600;
}

.room-id-display {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-secondary);
  margin-top: var(--spacing-xs);
  font-family: var(--font-mono);
  letter-spacing: 0.5px;
}

.room-id-display.hidden {
  display: none;
}

.room-topic {
  color: var(--text-secondary);
}

.players-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
}

.player-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
}



.player-row.ready {
  border-color: var(--accent-primary);
}



.player-row.disconnected {
  opacity: 0.6;
  border-color: var(--text-muted);
  border-style: dashed;
}



.player-row.disconnected .player-avatar,
.player-row.disconnected .player-info {
  opacity: 0.7;
}



/* Keep action buttons fully visible and clickable for disconnected players */
.player-row.disconnected .player-actions {
  opacity: 1;
}



.player-row.disconnected .player-actions .btn {
  opacity: 1;
}

.player-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-tertiary);
}

.player-info {
  flex: 1;
}

.player-name {
  font-weight: 600;
}

.player-name-link {
  color: var(--text-primary);
  text-decoration: none;
  transition: color 0.2s;
}

.player-name-link:hover {
  color: var(--accent-primary);
  text-decoration: underline;
}

.player-badges {
  display: flex;
  gap: var(--spacing-xs);
}

.badge {
  padding: 2px 6px;
  font-size: 0.6875rem;
  font-weight: 600;
  border-radius: 4px;
  text-transform: uppercase;
}

.badge-host {
  background: var(--accent-warning);
  color: var(--bg-primary);
}

.badge-ready {
  background: var(--accent-primary);
  color: var(--bg-primary);
}

.badge-friend {
  background: var(--accent-secondary);
  color: var(--bg-primary);
}

.badge-disconnected {
  background: var(--text-muted);
  color: var(--bg-primary);
}

.room-registered-only-text {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-style: italic;
}

/* Practice Mode Badge */
.practice-mode-badge {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-success);
  background: rgba(34, 197, 94, 0.15);
  border: 1px solid var(--accent-success);
  padding: 4px 12px;
  border-radius: 16px;
  margin-bottom: 4px;
}

.practice-results-banner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.3);
  border-radius: var(--border-radius);
  padding: var(--spacing-md) var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.practice-results-banner .practice-badge {
  font-weight: 600;
  color: var(--accent-success);
}

.practice-results-banner .practice-notice {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.auto-ended-banner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  background: rgba(249, 115, 22, 0.1);
  border: 1px solid rgba(249, 115, 22, 0.3);
  border-radius: var(--border-radius);
  padding: var(--spacing-md) var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.auto-ended-banner .auto-ended-icon {
  font-size: 1.3rem;
}

.auto-ended-banner .auto-ended-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.auto-ended-banner .auto-ended-title {
  font-weight: 600;
  color: var(--accent-warning, #f97316);
}

.auto-ended-banner .auto-ended-message {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.player-actions {
  display: flex;
  gap: var(--spacing-sm);
  margin-left: auto;
}

.player-actions .add-friend-btn {
  min-width: 32px;
  padding: 4px 8px;
  font-size: 1rem;
  font-weight: bold;
}

.lobby-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

.chat-panel {
  width: 300px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  display: flex;
  flex-direction: column;
  height: 400px;
}

.chat-header {
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--border-color);
}

.chat-header h3 {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.chat-message {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.chat-message-author {
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--accent-primary);
}

.chat-message-text {
  word-wrap: break-word;
  line-height: 1.4;
}

.chat-message-timestamp {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.chat-input {
  display: flex;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  border-top: 1px solid var(--border-color);
}

.chat-input input {
  flex: 1;
  padding: var(--spacing-sm);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.chat-input input:focus {
  outline: none;
  border-color: var(--accent-primary);
}

/* ============================================
   Game
   ============================================ */
.game {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
}

.game-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
  gap: var(--spacing-md);
  position: relative;
}

.question-info {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 120px;
}

.question-number {
  font-weight: 600;
}

.topic-name {
  font-size: 0.85rem;
  color: var(--text-secondary);
  background: var(--surface-2);
  border: 1px solid var(--border-subtle);
  padding: 4px 8px;
  border-radius: 999px;
  align-self: flex-start;
  max-width: 200px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Timer container - absolutely centered */
.timer {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 64px;
  height: 64px;
}

.timer-bar {
  --timer-progress: 360deg;
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: conic-gradient(var(--accent-primary) 0deg,
      var(--accent-primary) var(--timer-progress),
      var(--border-color) var(--timer-progress),
      var(--border-color) 360deg);
  /* Create a smooth ring with anti-aliasing */
  -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - 5px), #fff calc(100% - 4px));
  mask: radial-gradient(farthest-side, transparent calc(100% - 5px), #fff calc(100% - 4px));
}

.timer-text {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  font-family: var(--font-mono);
  /* Prevent layout shift from number width changes */
  min-width: 2ch;
}

/* REVIEW: If both .warning and .danger are applied, .danger wins due later source order. */
.timer.warning .timer-bar {
  background: conic-gradient(var(--accent-warning) 0deg,
      var(--accent-warning) var(--timer-progress),
      var(--border-color) var(--timer-progress),
      var(--border-color) 360deg);
}

.timer.danger .timer-bar {
  background: conic-gradient(var(--accent-danger) 0deg,
      var(--accent-danger) var(--timer-progress),
      var(--border-color) var(--timer-progress),
      var(--border-color) 360deg);
}

.question-container {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

/* Question image (optional, shown above question text) */
.question-image-wrapper {
  width: 100%;
  max-height: 35vh;
  margin-bottom: var(--spacing-md);
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  border-radius: var(--border-radius);
  background: var(--bg-tertiary);
}

.question-image {
  max-width: 100%;
  max-height: 35vh;
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: var(--border-radius);
}

/* Reserve space while image loads to prevent layout shift */
.question-image-wrapper.loading {
  min-height: 120px;
}

/* Question audio player (compact inline player above question text) */
.question-audio-player {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  width: 100%;
  max-width: 400px;
  margin: 0 auto var(--spacing-md);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: 999px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
}

.audio-play-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  min-width: 36px;
  border-radius: 50%;
  border: none;
  background: var(--accent-primary);
  color: white;
  cursor: pointer;
  transition: background 0.15s;
}

.audio-play-btn:hover {
  background: var(--accent-secondary);
}

.audio-icon {
  width: 18px;
  height: 18px;
}

.audio-progress-wrapper {
  flex: 1;
  height: 4px;
  border-radius: 2px;
  background: var(--border-color);
  overflow: hidden;
  cursor: pointer;
}

.audio-progress-bar {
  height: 100%;
  width: 0%;
  background: var(--accent-primary);
  border-radius: 2px;
  transition: width 0.1s linear;
}

.audio-time {
  font-size: 0.75rem;
  color: var(--text-muted);
  min-width: 32px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.question-text {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-xl);
}

/* Extra info reveal (shown after correct answer) */
.question-text.extra-info-reveal {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  animation: extraInfoFadeIn 0.4s ease-out;
}

.extra-info-image {
  max-width: 100%;
  max-height: 220px;
  border-radius: var(--border-radius);
  object-fit: contain;
}

.extra-info-text {
  font-size: 1.1rem;
  color: var(--text-secondary);
  text-align: center;
  line-height: 1.4;
}

@keyframes extraInfoFadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.answers-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
}

.answer-btn {
  padding: var(--spacing-lg);
  font-size: 1rem;
  font-weight: 500;
  text-align: center;
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast), padding-bottom 0.3s ease;
  position: relative;
  overflow: hidden;
  min-height: 70px;
}

/* When answer has distribution bar, add bottom padding */
.answer-btn:has(.answer-distribution) {
  padding-bottom: calc(var(--spacing-lg) + 28px);
}

.answer-btn:focus:not(:focus-visible) {
  outline: none;
}

.answer-btn:hover:not(:disabled) {
  border-color: var(--accent-secondary);
  background: var(--bg-tertiary);
}

.answer-btn.selected {
  border-color: var(--accent-secondary);
  background: var(--bg-tertiary);
}

/* REVIEW: If both .correct and .incorrect are present, .incorrect wins due later source order. */
.answer-btn.correct {
  border-color: var(--accent-primary);
  background: rgba(74, 222, 128, 0.2);
}

.answer-btn.incorrect {
  border-color: var(--accent-danger);
  background: rgba(239, 68, 68, 0.2);
}

.answer-btn.user-answer::before {
  content: '👤';
  position: absolute;
  top: 6px;
  right: 8px;
  font-size: 0.9rem;
  opacity: 0.9;
}

.answer-btn:disabled {
  cursor: not-allowed;
}

/* Reconnect read-only banner */
.reconnect-readonly-banner {
  grid-column: 1 / -1;
  text-align: center;
  padding: 8px 16px;
  background: var(--primary-light, #e3f0ff);
  color: var(--primary, #007AFF);
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  opacity: 0.9;
}

/* Answer Distribution Visualization */
.answer-distribution {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 24px;
  display: flex;
  align-items: center;
  background: rgba(0, 0, 0, 0.15);
}

.distribution-bar {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  transition: width 0.4s ease-out;
  opacity: 0.35;
}

.distribution-bar.correct {
  background: var(--accent-primary);
}

.distribution-bar.incorrect {
  background: var(--accent-danger);
}

.distribution-count {
  position: relative;
  z-index: 1;
  padding: 0 var(--spacing-sm);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-primary);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
  cursor: help;
}

.scoreboard {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  justify-content: center;
  padding: var(--spacing-md);
  background: var(--bg-secondary);
  border-radius: var(--border-radius);
  margin-top: var(--spacing-sm);
  border-top: 1px solid var(--border-color);
}

.score-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--bg-card);
  border-radius: var(--border-radius);
  font-size: 0.875rem;
}



.score-item.current-user {
  border: 1px solid var(--accent-primary);
}

.score-position {
  font-weight: 700;
  color: var(--accent-warning);
}

/* ============================================
   Reactions (during gameplay)
   ============================================ */
.reaction-bar {
  display: flex;
  justify-content: center;
  gap: 8px;
  padding: 10px 0;
  flex-wrap: nowrap;
}

.reaction-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  font-size: 1.3rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.reaction-btn:hover {
  transform: scale(1.12);
  background: var(--bg-hover);
  border-color: var(--accent-primary);
}

.reaction-btn:active,
.reaction-btn.reaction-sent {
  transform: scale(0.9);
  background: var(--accent-primary);
  border-color: var(--accent-primary);
}

.reaction-display {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 100;
}

.floating-reaction {
  position: absolute;
  bottom: 20%;
  display: flex;
  flex-direction: column;
  align-items: center;
  transform: translateX(-50%);
  opacity: 0;
  animation: none;
}

.floating-reaction.animate {
  animation: floatUp 2.5s ease-out forwards;
}

.floating-reaction .reaction-emoji {
  font-size: 2.5rem;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.floating-reaction .reaction-username {
  font-size: 0.75rem;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  padding: 2px 8px;
  border-radius: var(--border-radius-sm);
  margin-top: 4px;
  white-space: nowrap;
  max-width: 100px;
  overflow: hidden;
  text-overflow: ellipsis;
}



.floating-reaction.own-reaction .reaction-username {
  background: var(--accent-primary);
  color: white;
}

@keyframes floatUp {
  0% {
    opacity: 0;
    transform: translateX(-50%) translateY(0) scale(0.5);
  }

  15% {
    opacity: 1;
    transform: translateX(-50%) translateY(-20px) scale(1.1);
  }

  30% {
    transform: translateX(-50%) translateY(-40px) scale(1);
  }

  100% {
    opacity: 0;
    transform: translateX(-50%) translateY(-150px) scale(0.8);
  }
}

/* Small screens: slightly smaller reaction buttons */
@media (max-width: 600px) {
  .reaction-btn {
    width: 38px;
    height: 38px;
    font-size: 1.15rem;
  }

  .floating-reaction .reaction-emoji {
    font-size: 2rem;
  }
}

@media (max-width: 360px) {
  .reaction-btn {
    width: 34px;
    height: 34px;
    font-size: 1.05rem;
  }
}

/* Quit button at bottom of game */
.quit-game-bottom {
  display: block;
  margin: var(--spacing-md) auto 0;
  padding: 8px 28px;
  font-size: 0.8rem;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid var(--border-subtle);
  border-radius: 999px;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
  -webkit-tap-highlight-color: transparent;
}

.quit-game-bottom:hover {
  color: var(--accent-danger);
  border-color: var(--accent-danger);
}

/* ============================================
   Results
   ============================================ */
.results {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}

.results h1 {
  margin-bottom: var(--spacing-xl);
}

.results-podium {
  display: flex;
  justify-content: center;
  align-items: flex-end;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.podium-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--spacing-md);
}

.podium-position {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: var(--spacing-sm);
}

.podium-item:nth-child(1) .podium-position {
  color: gold;
}

.podium-item:nth-child(2) .podium-position {
  color: silver;
}

.podium-item:nth-child(3) .podium-position {
  color: #cd7f32;
}

.podium-avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  margin-bottom: var(--spacing-sm);
}

.podium-score {
  color: var(--text-secondary);
}

.results-table {
  margin-bottom: var(--spacing-xl);
}

.result-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-card);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-sm);
}

.result-position {
  width: 30px;
  font-weight: 700;
  color: var(--text-secondary);
}

.result-info {
  flex: 1;
  text-align: left;
}

.result-stats {
  display: flex;
  gap: var(--spacing-lg);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.results-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

.results-hint {
  margin-top: var(--spacing-md);
  text-align: center;
  font-size: 0.875rem;
}

/* ============================================
   Question Review (Results Screen)
   ============================================ */
.question-review {
  margin-bottom: var(--spacing-xl);
}

.question-review.hidden {
  display: none;
}

.question-review-toggle {
  display: flex;
  align-items: center;
  width: 100%;
  padding: var(--spacing-md);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  color: var(--text-primary);
  font-size: 0.95rem;
  cursor: pointer;
  transition: background var(--transition-fast);
  gap: var(--spacing-sm);
}

.question-review-toggle:hover {
  background: var(--bg-secondary);
}

.question-review-title {
  font-weight: 600;
}

.question-review-summary {
  margin-left: auto;
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.question-review-chevron {
  font-size: 0.7rem;
  color: var(--text-muted);
  transition: transform var(--transition-fast);
}

.question-review-toggle.open .question-review-chevron {
  transform: rotate(90deg);
}

.question-review-list {
  display: none;
  flex-direction: column;
  gap: 2px;
  margin-top: 2px;
}

.question-review-list.open {
  display: flex;
}

.qr-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-card);
  border-left: 3px solid transparent;
}

.qr-item:first-child {
  border-radius: var(--border-radius) var(--border-radius) 0 0;
}

.qr-item:last-child {
  border-radius: 0 0 var(--border-radius) var(--border-radius);
}

.qr-item.correct {
  border-left-color: var(--accent-primary);
}

.qr-item.incorrect {
  border-left-color: var(--accent-danger);
}

.qr-item.timed-out {
  border-left-color: var(--accent-warning);
}

.qr-icon {
  flex-shrink: 0;
  font-size: 0.95rem;
  line-height: 1.4;
}

.qr-content {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.qr-question {
  text-align: left;
  font-size: 0.85rem;
  color: var(--text-primary);
  line-height: 1.4;
  word-break: break-word;
}

.qr-detail {
  text-align: left;
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.3;
}

.qr-detail strong {
  color: var(--text-primary);
  font-weight: 600;
}

.qr-report-btn {
  flex-shrink: 0;
  align-self: center;
  background: none;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  color: var(--text-muted);
  font-size: 0.95rem;
  padding: 4px 8px;
  cursor: pointer;
  line-height: 1;
  transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
  opacity: 1;
}

.qr-report-btn:hover {
  color: var(--accent-warning);
  border-color: var(--accent-warning);
  background: rgba(251, 191, 36, 0.1);
}

/* ============================================
   Guide / How It Works Page
   ============================================ */
.guide-page {
  max-width: 700px;
  margin: 0 auto;
  padding-bottom: var(--spacing-2xl);
}

.guide-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.guide-header h1 {
  font-size: 1.75rem;
  margin-bottom: var(--spacing-xs);
}

.guide-subtitle {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.guide-sections {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.guide-section {
  background: var(--bg-card);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  position: relative;
}

.guide-section-icon {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  font-size: 1.5rem;
  opacity: 0.5;
}

.guide-section h2 {
  font-size: 1.1rem;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.guide-content {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.guide-content p {
  margin-bottom: var(--spacing-sm);
}

.guide-content strong {
  color: var(--text-primary);
}

.guide-formula {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  background: var(--bg-secondary);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--border-radius);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  margin: var(--spacing-sm) 0;
}

.formula-label {
  color: var(--accent-primary);
  font-weight: 600;
}

.formula-value {
  color: var(--text-muted);
}

.guide-tip {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: var(--spacing-sm);
  padding-left: var(--spacing-sm);
  border-left: 2px solid var(--accent-primary);
}

.guide-warning {
  font-size: 0.85rem;
  color: var(--text-secondary);
  background: rgba(255, 152, 0, 0.1);
  border-left: 3px solid #ff9800;
  padding: var(--spacing-sm) var(--spacing-md);
  margin: var(--spacing-md) 0;
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.guide-numbers-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-sm);
  margin-top: var(--spacing-sm);
}

.guide-number-card {
  background: var(--bg-secondary);
  border-radius: var(--border-radius);
  padding: var(--spacing-md);
  text-align: center;
}

.number-example {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.number-example.positive {
  color: var(--accent-primary);
}



.number-example.xp {
  color: var(--accent-secondary);
  font-size: 1.25rem;
}

.number-example.points {
  color: var(--accent-warning);
  font-size: 1.25rem;
}

.number-name {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.number-desc {
  font-size: 0.7rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.guide-list {
  list-style: none;
  padding: 0;
  margin: var(--spacing-sm) 0;
}

.guide-list li {
  padding: var(--spacing-xs) 0;
  padding-left: var(--spacing-md);
  position: relative;
}

.guide-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--text-muted);
}

.guide-list .highlight {
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 600;
}

.guide-list .highlight.win {
  background: rgba(74, 222, 128, 0.15);
  color: var(--accent-primary);
}

.guide-list .highlight.loss {
  background: rgba(239, 68, 68, 0.15);
  color: var(--accent-danger);
}

.guide-tiers {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin: var(--spacing-sm) 0;
}

.guide-tiers .tier {
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius);
  font-size: 0.8rem;
  font-weight: 500;
}

.guide-tiers .tier.bronze {
  background: rgba(205, 127, 50, 0.15);
  color: #cd7f32;
}

.guide-tiers .tier.silver {
  background: rgba(192, 192, 192, 0.15);
  color: #c0c0c0;
}

.guide-tiers .tier.gold {
  background: rgba(255, 215, 0, 0.15);
  color: #ffd700;
}

.guide-tiers .tier.platinum {
  background: rgba(185, 242, 255, 0.15);
  color: #b9f2ff;
}

.guide-footer {
  text-align: center;
  margin-top: var(--spacing-xl);
  padding: var(--spacing-lg);
  color: var(--text-muted);
  font-size: 0.9rem;
}

.guide-footer a {
  color: var(--accent-primary);
  text-decoration: none;
}

.guide-footer a:hover {
  text-decoration: underline;
}

/* Mobile responsive for guide */
@media (max-width: 640px) {

  /* Game page topic truncation on mobile */
  .topic-name {
    max-width: 110px;
    font-size: 0.75rem;
  }

  .guide-numbers-grid {
    grid-template-columns: 1fr;
  }

  .guide-section {
    padding: var(--spacing-md);
  }

  .guide-section-icon {
    display: none;
  }

  .guide-tiers {
    flex-direction: column;
  }
}

/* ============================================
   Privacy Policy
   ============================================ */
.privacy-page {
  max-width: 700px;
  margin: 0 auto;
  padding-bottom: var(--spacing-2xl);
}

.privacy-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.privacy-header h1 {
  font-size: 1.75rem;
  margin-bottom: var(--spacing-xs);
}

.privacy-updated {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.privacy-sections {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.privacy-section {
  background: var(--bg-card);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
}

.privacy-section h2 {
  font-size: 1.1rem;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.privacy-section h3 {
  font-size: 0.95rem;
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.privacy-section p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--spacing-sm);
}

.privacy-section ul {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  padding-left: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
}

.privacy-section li {
  margin-bottom: var(--spacing-xs);
}

.privacy-section a {
  color: var(--accent-primary);
  text-decoration: none;
}

.privacy-section a:hover {
  text-decoration: underline;
}

@media (max-width: 640px) {
  .privacy-section {
    padding: var(--spacing-md);
  }
}

/* ============================================
   Terms of Service
   ============================================ */
.terms-page {
  max-width: 700px;
  margin: 0 auto;
  padding-bottom: var(--spacing-2xl);
}

.terms-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.terms-header h1 {
  font-size: 1.75rem;
  margin-bottom: var(--spacing-xs);
}

.terms-updated {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.terms-sections {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.terms-section {
  background: var(--bg-card);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
}

.terms-section h2 {
  font-size: 1.1rem;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.terms-section h3 {
  font-size: 0.95rem;
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.terms-section p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--spacing-sm);
}

.terms-section ul {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  padding-left: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
}

.terms-section li {
  margin-bottom: var(--spacing-xs);
}

.terms-section a {
  color: var(--accent-primary);
  text-decoration: none;
}

.terms-section a:hover {
  text-decoration: underline;
}

@media (max-width: 640px) {
  .terms-section {
    padding: var(--spacing-md);
  }
}

/* ============================================
   About Page
   ============================================ */
.about-page {
  max-width: 700px;
  margin: 0 auto;
  padding-bottom: var(--spacing-2xl);
}

.about-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.about-header h1 {
  font-size: 1.75rem;
  margin-bottom: var(--spacing-xs);
}

.about-tagline {
  color: var(--text-secondary);
  font-size: 1rem;
  font-style: italic;
}

.about-sections {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.about-section {
  background: var(--bg-card);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
}

.about-section h2 {
  font-size: 1.15rem;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.about-section p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--spacing-sm);
}

.about-section ul {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  padding-left: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
}

.about-section li {
  margin-bottom: var(--spacing-sm);
}

.about-section a {
  color: var(--accent-primary);
  text-decoration: none;
}

.about-section a:hover {
  text-decoration: underline;
}

@media (max-width: 640px) {
  .about-section {
    padding: var(--spacing-md);
  }
}

/* ============================================
   Media Credits Page
   ============================================ */
.credits-page {
  max-width: 600px;
  margin: 0 auto;
  padding-bottom: var(--spacing-2xl);
}

.credits-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.credits-header h1 {
  font-size: 1.75rem;
  margin-bottom: var(--spacing-xs);
}

.credits-subtitle {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.credits-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-xs) 0;
  border-bottom: 1px solid var(--border-color);
}

.credits-item:last-child {
  border-bottom: none;
}

.credits-icon {
  font-size: 1rem;
  flex-shrink: 0;
}

.credits-attribution {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.credits-author {
  font-weight: 500;
  color: var(--text-primary);
}

.credits-source-link {
  color: var(--accent-primary);
  text-decoration: none;
}

.credits-source-link:hover {
  text-decoration: underline;
}

.credits-license {
  font-style: italic;
}

/* ============================================
   Match History
   ============================================ */
.history-page {
  max-width: 700px;
  margin: 0 auto;
}

.history-header {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.history-header h1 {
  margin-bottom: var(--spacing-xs);
  font-size: 1.5rem;
}

.history-subtitle {
  color: var(--text-secondary);
  font-size: 0.8rem;
}

.history-stats {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  justify-content: center;
  flex-wrap: wrap;
}

.history-stats .stat-card {
  padding: var(--spacing-sm) var(--spacing-md);
}

.history-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.history-match-card {
  display: flex;
  align-items: stretch;
  gap: var(--spacing-md);
  background: var(--bg-card);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-md);
  transition: all var(--transition-fast);
  border-left: 4px solid transparent;
}

.history-match-card.win {
  border-left-color: var(--accent-primary);
}

.history-match-card.loss {
  border-left-color: var(--accent-danger);
}

.history-match-card:hover {
  background: var(--bg-secondary);
  transform: translateX(2px);
}

/* Left section - Result badge */
.match-card-left {
  display: flex;
  align-items: center;
}

.match-result-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 60px;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius);
  text-align: center;
}

.match-result-badge.win {
  background: rgba(74, 222, 128, 0.15);
}

.match-result-badge.loss {
  background: rgba(239, 68, 68, 0.1);
}

.match-result-badge .result-position {
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.2;
}

.match-result-badge.win .result-position {
  color: var(--accent-primary);
}

.match-result-badge.loss .result-position {
  color: var(--accent-danger);
}

.match-result-badge .result-label {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  opacity: 0.8;
}

.match-result-badge.win .result-label {
  color: var(--accent-primary);
}

.match-result-badge.loss .result-label {
  color: var(--accent-danger);
}

/* Center section - Main info */
.match-card-center {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.match-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-sm);
}

.topic-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--bg-tertiary);
  padding: 2px 8px;
  border-radius: var(--border-radius-sm);
}

.topic-badge .topic-icon {
  font-size: 0.8rem;
}

.topic-badge .topic-name {
  font-weight: 500;
  font-size: 0.8rem;
  color: var(--text-primary);
}

.match-header .match-time {
  font-size: 0.75rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.match-details {
  display: flex;
  align-items: center;
}

.match-stat-group {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.match-stat {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.match-stat .stat-value {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.2;
}

.match-stat .stat-label {
  font-size: 0.65rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.match-stat.rating-stat.positive .stat-value {
  color: var(--accent-primary);
}



.match-stat.rating-stat.negative .stat-value {
  color: var(--accent-danger);
}



.match-stat.rating-stat.neutral .stat-value {
  color: var(--text-muted);
}

/* Right section - Opponents */
.match-card-right {
  display: flex;
  align-items: center;
  padding-left: var(--spacing-md);
  border-left: 1px solid var(--border-color);
}

.opponents-section {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  min-width: 80px;
}

.vs-label {
  font-size: 0.6rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.participants-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.participant-item {
  display: flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  transition: opacity var(--transition-fast);
}

.participant-item:hover {
  opacity: 0.8;
}

.participant-item:hover .participant-name {
  color: var(--accent-primary);
}

.participant-avatar {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  object-fit: cover;
  flex-shrink: 0;
}

.participant-name {
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 500;
  max-width: 80px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: color var(--transition-fast);
}

.participant-more {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 2px 6px;
  border-radius: var(--border-radius-sm);
  background: var(--bg-tertiary);
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--text-muted);
}

.solo-badge {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-style: italic;
  padding: 2px 6px;
  background: var(--bg-tertiary);
  border-radius: var(--border-radius-sm);
}

.history-load-more {
  display: flex;
  justify-content: center;
  margin-top: var(--spacing-lg);
}

.history-empty,
.history-loading,
.history-error {
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--text-secondary);
}

.history-empty .empty-icon,
.history-error .error-icon {
  font-size: 3rem;
  display: block;
  margin-bottom: var(--spacing-sm);
}

.history-empty h3 {
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
  font-size: 1rem;
}

.history-empty .btn {
  margin-top: var(--spacing-md);
}

.history-loading .loading-spinner {
  width: 32px;
  height: 32px;
  border: 2px solid var(--border-color);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  margin: 0 auto var(--spacing-sm);
  animation: spin 1s linear infinite;
}

/* Mobile responsive for history */
@media (max-width: 768px) {
  .history-match-card {
    flex-wrap: wrap;
    gap: var(--spacing-sm);
  }

  .match-card-left {
    flex: 0 0 auto;
  }

  .match-result-badge {
    width: 50px;
    padding: var(--spacing-xs);
  }

  .match-result-badge .result-position {
    font-size: 0.95rem;
  }

  .match-card-center {
    flex: 1;
    min-width: 150px;
  }

  .match-stat-group {
    gap: var(--spacing-md);
  }

  .match-stat .stat-value {
    font-size: 0.9rem;
  }

  .match-card-right {
    flex: 0 0 100%;
    border-left: none;
    border-top: 1px solid var(--border-color);
    padding-left: 0;
    padding-top: var(--spacing-sm);
    justify-content: flex-start;
  }

  .opponents-section {
    flex-direction: row;
    align-items: center;
    gap: var(--spacing-sm);
    min-width: auto;
  }

  .participants-list {
    flex-direction: row;
    gap: var(--spacing-sm);
  }
}

@media (max-width: 480px) {
  .match-header {
    flex-wrap: wrap;
  }

  .topic-badge {
    flex: 1;
  }

  .match-stat-group {
    gap: var(--spacing-sm);
  }

  .match-stat .stat-value {
    font-size: 0.85rem;
  }

  .match-stat .stat-label {
    font-size: 0.6rem;
  }
}

/* ============================================
   Individual Topic Page
   ============================================ */
.topic-page {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--spacing-lg) var(--spacing-md);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

.breadcrumb a {
  color: var(--primary);
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

.breadcrumb-sep {
  color: var(--text-secondary);
  opacity: 0.5;
}

.topic-page-header {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.topic-page-icon {
  font-size: 3rem;
  line-height: 1;
}

.topic-page-header h1 {
  margin: 0 0 var(--spacing-xs);
}

.topic-page-desc {
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.6;
}

.topic-page-actions {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.topic-page-category {
  display: inline-block;
  margin-top: var(--spacing-sm);
  padding: 4px 12px;
  background: var(--bg-tertiary);
  border-radius: 20px;
  font-size: 0.825rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.topic-page-category:hover {
  color: var(--text-primary);
  background: var(--border-color);
}

.topic-page-samples {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--border-color);
}

.topic-page-samples h2 {
  font-size: 1.25rem;
  margin: 0 0 var(--spacing-xs);
}

.topic-page-samples-subtitle {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin: 0 0 var(--spacing-md);
}

.topic-sample-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.topic-sample-list li {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-secondary);
  border-radius: var(--border-radius);
  border-left: 3px solid var(--accent-primary);
  font-size: 0.95rem;
  color: var(--text-primary);
  line-height: 1.5;
}

.sample-content {
  flex: 1;
  min-width: 0;
}

.sample-media {
  margin-top: var(--spacing-xs);
}

.sample-media-img {
  max-width: 240px;
  max-height: 160px;
  border-radius: var(--border-radius);
  object-fit: contain;
}

.sample-media-audio {
  display: block;
  width: 100%;
  max-width: 300px;
  height: 36px;
}

.sample-bullet {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--bg-tertiary);
  color: var(--accent-primary);
  font-size: 0.75rem;
  font-weight: 700;
}

.topic-page-footer {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--border-color);
  text-align: center;
}

.topic-page-report {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.825rem;
  cursor: pointer;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.topic-page-report:hover {
  color: var(--text-secondary);
  background: var(--bg-secondary);
}

@media (max-width: 600px) {
  .topic-page-header {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .topic-page-actions {
    flex-direction: column;
  }

  .topic-page-actions .btn {
    width: 100%;
    text-align: center;
  }

  .topic-sample-list li {
    font-size: 0.9rem;
    padding: var(--spacing-sm);
  }
}

/* ============================================
   Leaderboard
   ============================================ */
.leaderboard-page {
  max-width: 800px;
  margin: 0 auto;
}

.leaderboard-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.leaderboard-header h1 {
  margin-bottom: var(--spacing-xs);
  font-size: 2rem;
}

.leaderboard-subtitle {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.leaderboard-filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  align-items: center;
  margin-bottom: var(--spacing-lg);
}

.leaderboard-stats {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
}

.leaderboard-info-note {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background: var(--bg-secondary);
  border-radius: var(--border-radius);
  border-left: 3px solid var(--accent-primary);
  margin-bottom: var(--spacing-lg);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.leaderboard-info-note .info-icon {
  font-size: 1.25rem;
  flex-shrink: 0;
}

.stat-card {
  flex: 1;
  min-width: 150px;
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-card);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
}

.stat-icon {
  font-size: 2rem;
}

.stat-info {
  display: flex;
  flex-direction: column;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-primary);
  line-height: 1;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.leaderboard-view-tabs {
  display: flex;
  gap: var(--spacing-xs);
  background: var(--bg-secondary);
  padding: var(--spacing-xs);
  border-radius: var(--border-radius);
}

.view-tab {
  padding: var(--spacing-sm) var(--spacing-md);
  background: transparent;
  border: none;
  border-radius: var(--border-radius);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 500;
  transition: var(--transition-fast);
}

.view-tab:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

.view-tab.active {
  background: var(--accent-primary);
  color: var(--bg-primary);
}

.leaderboard-period-tabs {
  display: flex;
  gap: var(--spacing-xs);
  background: var(--bg-secondary);
  padding: var(--spacing-xs);
  border-radius: var(--border-radius);
}

.period-tab {
  padding: var(--spacing-sm) var(--spacing-md);
  background: transparent;
  border: none;
  border-radius: var(--border-radius);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 500;
  transition: var(--transition-fast);
}

.period-tab:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

.period-tab.active {
  background: var(--accent-primary);
  color: var(--bg-primary);
}

.leaderboard-section {
  margin-bottom: var(--spacing-xxl);
}

.leaderboard-section-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.leaderboard-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-card);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-sm);
  transition: var(--transition-fast);
}

.leaderboard-row:hover {
  background: var(--bg-secondary);
  transform: translateX(4px);
}



.leaderboard-row.current-user {
  background: linear-gradient(135deg, var(--accent-primary)15, var(--accent-secondary)15);
  border: 2px solid var(--accent-primary);
  box-shadow: 0 0 20px var(--accent-primary)30;
}

.leaderboard-rank {
  width: 40px;
  font-weight: 700;
  font-size: 1.25rem;
  text-align: center;
}

.leaderboard-rank.gold {
  color: gold;
  text-shadow: 0 0 10px gold;
}

.leaderboard-rank.silver {
  color: silver;
  text-shadow: 0 0 10px silver;
}

.leaderboard-rank.bronze {
  color: #cd7f32;
  text-shadow: 0 0 10px #cd7f32;
}

.leaderboard-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
}

.leaderboard-info {
  flex: 1;
}

.leaderboard-username {
  font-weight: 600;
  color: var(--text-primary);
  text-decoration: none;
  transition: color 0.2s;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.leaderboard-username:hover {
  color: var(--accent-primary);
  text-decoration: underline;
}

.you-badge {
  display: inline-block;
  padding: 2px 6px;
  background: var(--accent-primary);
  color: var(--bg-primary);
  border-radius: var(--border-radius);
  font-size: 0.625rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.leaderboard-stats {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.leaderboard-rating {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent-primary);
}

.leaderboard-rating .positive {
  color: var(--accent-primary);
}



.leaderboard-rating .negative {
  color: var(--accent-danger);
}

.leaderboard-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xxl);
  text-align: center;
  background: var(--bg-card);
  border-radius: var(--border-radius);
  margin-top: var(--spacing-lg);
}

.leaderboard-empty .empty-icon {
  font-size: 4rem;
  margin-bottom: var(--spacing-md);
  opacity: 0.5;
}

/* ============================================
   Profile - Minimal Modern Design
   ============================================ */
.profile-page {
  max-width: 700px;
  margin: 0 auto;
  padding: var(--spacing-lg) 0;
}

/* Profile Hero Card */
.profile-hero-card {
  position: relative;
  background: var(--bg-card);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  margin-bottom: var(--spacing-lg);
  box-shadow: var(--shadow-md);
}

.profile-hero-background {
  height: 80px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  opacity: 0.1;
}

.profile-hero-content {
  position: relative;
  padding: 0 var(--spacing-xl) var(--spacing-xl);
  margin-top: -40px;
  display: flex;
  gap: var(--spacing-lg);
  align-items: flex-end;
}

.profile-avatar-container {
  position: relative;
  flex-shrink: 0;
}

.profile-avatar-large {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  border: 4px solid var(--bg-card);
  background: var(--bg-tertiary);
  box-shadow: var(--shadow-md);
}

.profile-level-badge {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  border: 3px solid var(--bg-card);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.875rem;
  color: var(--bg-primary);
  box-shadow: var(--shadow-sm);
}

.profile-hero-info {
  flex: 1;
  min-width: 0;
  padding-bottom: var(--spacing-sm);
}

.profile-name {
  font-size: 1.75rem;
  font-weight: 700;
  margin: 0 0 var(--spacing-xs);
  color: var(--text-primary);
}

.profile-member-since {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

/* XP Progress Bar */
.profile-xp-container {
  margin-bottom: var(--spacing-md);
  max-width: 300px;
}

.xp-bar-wrapper {
  height: 8px;
  background: var(--bg-tertiary);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: var(--spacing-xs);
}

.xp-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  border-radius: 4px;
  transition: width 0.3s ease;
}

.xp-text {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.profile-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.badge-pending {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  padding: 4px 10px;
  font-size: 0.75rem;
  border-radius: 4px;
}

/* Stats Grid */
.profile-stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.profile-stat-card {
  background: var(--bg-card);
  border-radius: var(--border-radius);
  padding: var(--spacing-md) var(--spacing-sm);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  transition: transform var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.profile-stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.stat-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
  line-height: 1;
  min-width: 1.5rem;
}

.stat-content {
  flex: 1;
  min-width: 0;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Section Cards */
.profile-section-card {
  background: var(--bg-card);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
}

.section-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin: 0 0 var(--spacing-md);
  color: var(--text-primary);
}

/* Achievements */
.achievement-badges {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--spacing-md);
}

.achievement-badge {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-secondary);
  border-radius: var(--border-radius);
  transition: all var(--transition-fast);
}

.achievement-badge:hover {
  background: var(--bg-tertiary);
  transform: translateX(4px);
}

.achievement-icon {
  font-size: 2rem;
  line-height: 1;
  flex-shrink: 0;
}

.achievement-info {
  flex: 1;
  min-width: 0;
}

.achievement-label {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
  font-size: 0.875rem;
}

.achievement-desc {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.achievement-empty {
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* ============================================
   Matchmaking
   ============================================ */
.matchmaking {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 50vh;
  text-align: center;
}

.matchmaking-spinner {
  width: 60px;
  height: 60px;
  border: 4px solid var(--border-color);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: var(--spacing-lg);
}

/* Auth loading state (during session restore) */
.auth-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 50vh;
  text-align: center;
  color: var(--text-muted);
}

.auth-loading p {
  margin: 0;
  font-size: 1rem;
}

/* ============================================
   Quick Play
   ============================================ */
.quick-play-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 50vh;
  text-align: center;
}

.quick-play-spinner {
  margin: 0 auto;
  width: 60px;
  height: 60px;
  border: 4px solid var(--border-color);
  border-top-color: var(--accent-secondary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: var(--spacing-lg);
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes slideUp {
  from {
    transform: translateY(20px);
    opacity: 0;
  }

  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Achievement notification animations */
@keyframes slideInRight {
  from {
    transform: translateX(400px);
    opacity: 0;
  }

  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes slideOutRight {
  from {
    transform: translateX(0);
    opacity: 1;
  }

  to {
    transform: translateX(400px);
    opacity: 0;
  }
}

/* ============================================
   Modal
   ============================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: var(--spacing-md);
}

.modal-overlay.hidden {
  display: none;
}

.modal {
  position: relative;
  width: 100%;
  max-width: 400px;
  background: var(--bg-card);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
}

.modal-close {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 1.5rem;
  cursor: pointer;
  z-index: 9999;
}

.modal-close:hover {
  color: var(--text-primary);
}

/* ============================================
   Toast Notifications
   ============================================ */
.toast-container {
  position: fixed;
  bottom: var(--spacing-lg);
  right: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  z-index: 1100;
}

.toast {
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--bg-card);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  border-left: 4px solid var(--accent-primary);
  animation: toast-in 0.3s ease;
}



.toast.error {
  border-color: var(--accent-danger);
}

.toast.warning {
  border-color: var(--accent-warning);
}

@keyframes toast-in {
  from {
    transform: translateX(100%);
    opacity: 0;
  }

  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 768px) {
  :root {
    --header-height: 48px;
  }

  /* Mobile header layout: hamburger | points | avatar */
  .header-content {
    padding: 0 var(--spacing-sm);
  }

  .header-left {
    flex: 0 0 auto;
  }

  /* Hide the desktop logo on mobile since it's shown in center */
  .header-left>.logo {
    display: none;
  }

  .header-center-mobile {
    display: flex;
    flex: 1;
    justify-content: center;
  }

  .header-center-mobile .logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
  }

  .header-center-mobile .logo-icon {
    display: flex;
    width: 28px;
    height: 28px;
  }

  .header-center-mobile .logo-text {
    display: inline;
    /* Show logo text in mobile center */
  }

  /* Show dropdown user info on mobile */
  .dropdown-user-info,
  .dropdown-divider-mobile {
    display: block;
  }

  .header-actions {
    flex: 0 0 auto;
    gap: var(--spacing-sm);
  }

  .nav {
    display: none;
  }

  .logo-text {
    display: none;
  }

  .hamburger-menu {
    display: flex !important;
    order: -1;
  }

  /* Hide username on mobile, show only avatar */
  .user-name {
    display: none;
  }

  .user-button {
    padding: var(--spacing-xs);
    border: none;
  }

  .user-avatar {
    width: 32px;
    height: 32px;
  }

  /* Auth buttons on mobile */
  .auth-buttons .btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.75rem;
  }

  .mobile-nav-drawer {
    display: none !important;
  }

  .mobile-nav-drawer.open {
    display: flex !important;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .answers-grid {
    grid-template-columns: 1fr;
  }

  /* Smaller image on mobile to keep answers visible */
  .question-image-wrapper {
    max-height: 30vh;
  }

  .question-image {
    max-height: 30vh;
  }

  .question-audio-player {
    max-width: 100%;
  }

  .profile-hero-content {
    flex-direction: column;
    align-items: center;
    text-align: center;
    margin-top: -60px;
    padding: 0 var(--spacing-md) var(--spacing-lg);
  }

  .profile-hero-info {
    padding-bottom: 0;
  }

  .profile-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .achievement-badges {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .lobby-actions {
    flex-direction: column;
    width: 100%;
  }

  .lobby-actions .btn {
    width: 100%;
  }

  .lobby-content {
    flex-direction: column;
  }

  .chat-panel {
    width: 100%;
    height: 300px;
  }

  .results-actions {
    flex-direction: column;
    width: 100%;
  }

  .results-actions .btn,
  .results-actions a {
    width: 100%;
  }

  .toast-container {
    left: var(--spacing-md);
    right: var(--spacing-md);
  }
}

/* ============================================
   Rooms Page
   ============================================ */
.rooms-page {
  max-width: var(--max-width);
  margin: 0 auto;
}

.rooms-page .page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.rooms-page .page-header h1 {
  margin: 0;
}

.rooms-page .header-actions {
  display: flex;
  gap: var(--spacing-sm);
}

.rooms-filters {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-lg);
}

.rooms-filters .filter-group {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 10px 14px;
}

.filter-group-multiselect {
  position: relative;
}

.filter-label {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.filter-multiselect {
  position: relative;
  min-width: 190px;
}

.filter-group-multiselect .filter-multiselect {
  width: 100%;
}

.filter-multiselect-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  height: 35px;
  padding: 0 36px 0 12px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 13.33px;
  cursor: pointer;
  text-align: left;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  position: relative;
  box-sizing: border-box;
}

.filter-multiselect-toggle::after {
  content: '';
  position: absolute;
  right: 12px;
  top: 50%;
  width: 8px;
  height: 8px;
  border-left: 2px solid var(--text-secondary);
  border-bottom: 2px solid var(--text-secondary);
  transform: translateY(-50%) rotate(-45deg);
  pointer-events: none;
}

.filter-multiselect-toggle:hover,
.filter-group-multiselect.open .filter-multiselect-toggle,
.filter-multiselect.open .filter-multiselect-toggle {
  border-color: var(--accent-primary);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
}

.filter-multiselect-panel {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  width: min(320px, 80vw);
  max-height: 340px;
  display: none;
  flex-direction: column;
  gap: var(--spacing-sm);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.2);
  padding: var(--spacing-md);
  z-index: 10;
}

.filter-multiselect.open .filter-multiselect-panel,
.filter-group-multiselect.open .filter-multiselect-panel {
  display: flex;
}

.filter-multiselect-search input {
  width: 100%;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.filter-multiselect-options {
  max-height: 200px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.filter-option {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  cursor: pointer;
}

.filter-option input[type="checkbox"] {
  accent-color: var(--accent-primary);
  width: 16px;
  height: 16px;
}

.filter-multiselect-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-sm);
  font-size: 0.9rem;
}

.rooms-sort {
  min-width: 190px;
  height: 35px;
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 0 36px 0 12px;
  color: var(--text-primary);
  font-size: 13.33px;
  background-image: url("data:image/svg+xml,%3Csvg width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%23a0a0a0' stroke-width='2' stroke-linecap='round' stroke-linejoin='round' xmlns='http://www.w3.org/2000/svg'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 14px;
  box-sizing: border-box;
}

.rooms-sort:focus {
  border-color: var(--accent-primary);
  outline: none;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
}

.rooms-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.rooms-legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-secondary);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-lg);
  border-left: 3px solid var(--accent-primary);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.legend-icon {
  font-size: 1rem;
  display: flex;
  align-items: center;
}

/* Compact Room Card Design */
.room-card {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--spacing-md);
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-left: 5px solid var(--accent-primary);
  border-radius: var(--border-radius);
  padding: var(--spacing-md);
  transition: all var(--transition-fast);
}

.room-card:hover {
  border-color: var(--accent-primary);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* Left side: main info */
.room-card-left {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
  min-width: 0;
}

.room-card-title {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.room-name {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-primary);
  word-break: break-word;
  line-height: 1.2;
}

.room-card-topics {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.4;
  word-break: break-word;
}

.room-card-host {
  font-size: 0.8rem;
  color: var(--text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Right side: meta info and join button */
.room-card-right {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.room-registration-emoji {
  font-size: 1.5rem;
  line-height: 1;
}

.room-card-slots {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  text-align: center;
}

.join-room-btn {
  white-space: nowrap;
}

.empty-state {
  text-align: center;
  padding: var(--spacing-2xl);
  color: var(--text-secondary);
}

.rooms-filters-header {
  display: none;
  margin-bottom: var(--spacing-md);
}

.rooms-filters-toggle {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  width: 100%;
  justify-content: center;
}

.filters-toggle-icon {
  display: inline-block;
  transition: transform var(--transition-fast);
}

.rooms-filters-toggle.expanded .filters-toggle-icon {
  transform: rotate(180deg);
}

@media (max-width: 600px) {
  .rooms-filters-header {
    display: block;
  }

  .rooms-filters {
    display: none;
    flex-direction: column;
    gap: var(--spacing-sm);
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    border: 1px solid var(--border-color);
  }

  .rooms-filters.expanded {
    display: flex;
  }

  .rooms-filters .filter-group {
    width: 100%;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .filter-group-multiselect {
    width: 100%;
  }

  .filter-multiselect {
    width: 100%;
  }

  .rooms-sort {
    width: 100%;
    min-width: auto;
  }

  .rooms-legend {
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-sm);
  }

  .legend-item {
    font-size: 0.75rem;
    gap: 4px;
  }

  .legend-icon {
    font-size: 0.9rem;
  }

  .room-card {
    grid-template-columns: 1fr auto;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
  }

  .room-card-left {
    gap: 4px;
  }

  .room-name {
    font-size: 0.95rem;
  }

  .room-card-topics {
    font-size: 0.75rem;
  }

  .room-card-host {
    font-size: 0.7rem;
  }

  .room-card-right {
    gap: 6px;
  }

  .room-registration-emoji {
    font-size: 1.25rem;
  }

  .room-card-slots {
    font-size: 0.8rem;
  }

  .join-room-btn.btn-sm {
    padding: 0.35rem 0.75rem;
    font-size: 0.75rem;
  }
}

/* ============================================
   Friends Page
   ============================================ */
.friends-page {
  max-width: 800px;
  margin: 0 auto;
}

.friends-page .page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xl);
}

.friends-tabs {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: var(--spacing-sm);
}

.tab-btn {
  background: transparent;
  border: none;
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--text-secondary);
  cursor: pointer;
  position: relative;
  transition: color var(--transition-fast);
}

.tab-btn:hover {
  color: var(--text-primary);
}

.tab-btn.active {
  color: var(--accent-primary);
}

.tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: calc(-1 * var(--spacing-sm) - 1px);
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-primary);
}

.tab-btn .badge {
  background: var(--accent-danger);
  color: white;
  font-size: 0.7rem;
  padding: 2px 6px;
  border-radius: 10px;
  margin-left: var(--spacing-xs);
}

.tab-btn .badge:empty {
  display: none;
}

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
}

.friends-list,
.friend-requests-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.friend-card {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  transition: border-color var(--transition-fast);
}

.friend-card:hover {
  border-color: var(--accent-secondary);
}

.friend-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--bg-tertiary);
  object-fit: cover;
}

.friend-info {
  flex: 1;
}

.friend-name {
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.friend-name-link {
  color: var(--text-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.friend-name-link:hover {
  color: var(--accent-primary);
  text-decoration: underline;
}

.friend-status {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.online-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
}

.online-indicator.online {
  background: var(--accent-primary);
}

.friend-actions {
  display: flex;
  gap: var(--spacing-sm);
}

.friend-id-section {
  margin-top: var(--spacing-2xl);
  padding: var(--spacing-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  text-align: center;
}

.friend-id-section h3 {
  margin-bottom: var(--spacing-sm);
}

.friend-id-display {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-secondary);
  border-radius: var(--border-radius);
}

.friend-id-display code {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--accent-primary);
  letter-spacing: 2px;
}

/* Add Friend Modal */
.add-friend-modal,
.join-room-modal {
  padding: var(--spacing-lg);
  max-width: 400px;
  margin: 0 auto;
}

.join-room-divider {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin: var(--spacing-lg) 0;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.join-room-divider::before,
.join-room-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background-color: var(--border-color);
}

.form-hint {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: var(--spacing-xs);
}

/* Room Invitation Notification */
.room-invite-notification {
  position: fixed;
  bottom: var(--spacing-xl);
  right: var(--spacing-xl);
  background: var(--bg-card);
  border: 1px solid var(--accent-primary);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-lg);
  z-index: 1001;
  animation: slideInRight 0.3s ease;
  max-width: 350px;
}

@keyframes slideInRight {
  from {
    transform: translateX(100%);
    opacity: 0;
  }

  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.invite-content {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.invite-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-tertiary);
}

.invite-text {
  display: flex;
  flex-direction: column;
}

.invite-username {
  color: var(--accent-primary);
}

.invite-actions {
  display: flex;
  gap: var(--spacing-sm);
}

.invite-timer {
  margin-top: var(--spacing-sm);
  height: 3px;
  background: var(--accent-primary);
  border-radius: 2px;
  animation: timerShrink 60s linear forwards;
}

@keyframes timerShrink {
  from {
    width: 100%;
  }

  to {
    width: 0;
  }
}

/* Friend Request Card */
.request-card {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
}

.request-card .friend-actions {
  margin-left: auto;
}

/* ============================================
   Utilities
   ============================================ */
.text-muted {
  color: var(--text-muted);
}

/* Anti-cheat: Disable text selection during game */
.game .question-text,
.game .answer-btn {
  user-select: none;
  -webkit-user-select: none;
}

/* ============================================
   Custom Confirm Dialog
   ============================================ */
.confirm-dialog {
  text-align: center;
  padding: var(--spacing-md);
}

.confirm-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.confirm-header h3 {
  margin: 0;
  font-size: 1.25rem;
  color: var(--text-primary);
}

.confirm-icon {
  font-size: 2.5rem;
  line-height: 1;
}

.confirm-message {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  line-height: 1.5;
}

.confirm-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
}

.confirm-actions .btn {
  min-width: 100px;
  padding: var(--spacing-sm) var(--spacing-lg);
}

/* Progression Card (Profile/Dashboard) */
.progression-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.progression-card-guest {
  text-align: center;
  padding: var(--spacing-xl);
}

.progression-guest-message {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-secondary);
}

.progression-guest-icon {
  font-size: 2rem;
}

.progression-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-md);
}



.xp-text {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Topic Cards with Lock Status */
.topic-card {
  position: relative;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.topic-card-content {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
}

.topic-card-locked {
  opacity: 0.85;
}

.topic-card-locked:hover {
  opacity: 1;
}

.topic-lock-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(2px);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--border-radius);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.topic-card-locked:hover .topic-lock-overlay,
.topic-card-locked:focus .topic-lock-overlay {
  opacity: 1;
}

.topic-lock-overlay .lock-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
}

.topic-lock-overlay .lock-icon {
  font-size: 1.25rem;
}

.topic-lock-overlay .unlock-cost {
  font-weight: 600;
  color: var(--accent-secondary);
  font-size: 0.875rem;
}

.topic-lock-overlay .unlock-btn {
  margin-top: var(--spacing-xs);
}

.topic-unlocked-badge {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  color: var(--accent-primary-rgb);
  font-size: 0.7rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 10px;
}


/* Topic Difficulty Labels */
.topic-difficulty {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 4px;
  white-space: nowrap;
}

/* Topic Checkbox (Create Room Modal) */
.topic-checkbox {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-xs) 0;
}

.topic-checkbox-locked {
  opacity: 0.5;
  cursor: not-allowed;
}

.topic-checkbox-locked input {
  cursor: not-allowed;
}

.checkbox-text {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}

.topic-question-count {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.topic-lock-inline {
  background: var(--bg-tertiary);
  padding: 2px 6px;
  border-radius: 8px;
  font-size: 0.75rem;
  color: var(--accent-warning);
}

/* Match Rewards (Results Screen) */
.match-rewards {
  background: linear-gradient(135deg, var(--bg-card), var(--bg-tertiary));
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
  text-align: center;
}

.match-rewards-title {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
  font-weight: 500;
}

.rewards-grid {
  display: flex;
  justify-content: center;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
}

.reward-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.reward-icon {
  font-size: 1.5rem;
}

.reward-value {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent-primary);
}

.reward-label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.reward-item-levelup {
  background: linear-gradient(135deg, #FFD700, #FFA500);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius);
  animation: levelUpPulse 1.5s ease-in-out infinite;
}

.reward-item-levelup .reward-icon {
  font-size: 1.75rem;
}

.reward-item-levelup .reward-value {
  color: #1a1a1a;
  font-size: 1.1rem;
}

.reward-item-levelup .reward-label {
  color: #333;
  font-weight: 600;
}

@keyframes levelUpPulse {

  0%,
  100% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.05);
  }
}



.reward-item-partial .reward-label {
  color: var(--text-secondary);
}

.reward-item-reduced {
  opacity: 0.7;
  flex-direction: column;
}

.reward-item-reduced .reward-value {
  color: var(--text-muted);
}

.reward-note {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-style: italic;
  text-align: center;
  max-width: 120px;
}

@keyframes level-up-glow {

  0%,
  100% {
    box-shadow: 0 0 10px rgba(var(--accent-primary-rgb), 0.2);
  }

  50% {
    box-shadow: 0 0 20px rgba(var(--accent-primary-rgb), 0.4);
  }
}

/* Unlock Modal */
.unlock-modal {
  text-align: center;
  padding: var(--spacing-md);
}

.unlock-modal-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.unlock-topic-icon {
  font-size: 3rem;
  line-height: 1;
}

.unlock-modal-header h2 {
  margin: 0;
  font-size: 1.5rem;
}

.unlock-modal-body {
  margin-bottom: var(--spacing-xl);
}

.unlock-description {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

.unlock-cost-display,
.unlock-balance {
  display: flex;
  justify-content: space-between;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-tertiary);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-sm);
}

.cost-label,
.balance-label {
  color: var(--text-secondary);
}

.cost-value {
  font-weight: 700;
  color: var(--accent-secondary);
}

.balance-value {
  font-weight: 700;
  color: var(--accent-primary);
}



.balance-value.insufficient {
  color: var(--accent-danger);
}

.unlock-insufficient {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background: var(--accent-danger)15;
  border-radius: var(--border-radius);
  color: var(--accent-danger);
  font-size: 0.9rem;
  margin-top: var(--spacing-md);
}

.unlock-modal-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
}

.unlock-modal-actions .btn {
  min-width: 150px;
}

/* Responsive Progression Styles */
@media (max-width: 768px) {

  .level-badge {
    padding: 3px 8px;
    font-size: 0.75rem;
  }

  .progression-header {
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
  }

  .rewards-grid {
    gap: var(--spacing-lg);
  }

  .unlock-modal-actions {
    flex-direction: column;
  }

  .unlock-modal-actions .btn {
    width: 100%;
  }
}

/* ============================================
   Unlock Success Celebration Modal
   ============================================ */

.unlock-success-modal {
  text-align: center;
  padding: var(--spacing-lg);
  position: relative;
  overflow: hidden;
}

.unlock-success-confetti {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 60px;
  display: flex;
  justify-content: space-around;
  pointer-events: none;
}

.confetti-piece {
  font-size: 1.5rem;
  animation: confetti-fall 2s ease-out infinite;
  opacity: 0;
}

.confetti-piece:nth-child(1) {
  animation-delay: 0s;
}

.confetti-piece:nth-child(2) {
  animation-delay: 0.2s;
}

.confetti-piece:nth-child(3) {
  animation-delay: 0.4s;
}

.confetti-piece:nth-child(4) {
  animation-delay: 0.6s;
}

.confetti-piece:nth-child(5) {
  animation-delay: 0.8s;
}

@keyframes confetti-fall {
  0% {
    transform: translateY(-20px) rotate(0deg);
    opacity: 1;
  }

  100% {
    transform: translateY(60px) rotate(360deg);
    opacity: 0;
  }
}

.unlock-success-icon {
  position: relative;
  display: inline-block;
  margin: var(--spacing-lg) 0;
}

.topic-icon-large {
  font-size: 4rem;
  line-height: 1;
  display: block;
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.2));
  animation: icon-bounce 0.6s ease-out;
}

@keyframes icon-bounce {
  0% {
    transform: scale(0);
  }

  50% {
    transform: scale(1.2);
  }

  70% {
    transform: scale(0.9);
  }

  100% {
    transform: scale(1);
  }
}

.unlock-checkmark {
  position: absolute;
  bottom: -5px;
  right: -10px;
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--accent-primary), #22c55e);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: bold;
  color: #1a1a2e;
  box-shadow: 0 2px 8px rgba(34, 197, 94, 0.4);
  animation: checkmark-pop 0.4s ease-out 0.3s both;
}

@keyframes checkmark-pop {
  0% {
    transform: scale(0) rotate(-180deg);
  }

  100% {
    transform: scale(1) rotate(0deg);
  }
}

.unlock-success-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin: 0 0 var(--spacing-xs) 0;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.unlock-success-topic-name {
  font-size: 1.25rem;
  color: var(--text-primary);
  font-weight: 600;
  margin: 0 0 var(--spacing-lg) 0;
}

.unlock-success-message {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0 auto var(--spacing-lg) auto;
  max-width: 400px;
  padding: var(--spacing-md);
  background: var(--bg-tertiary);
  border-radius: var(--border-radius);
  border-left: 4px solid var(--accent-primary);
}

.unlock-success-message strong {
  color: var(--accent-secondary);
}

.unlock-success-balance {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: var(--spacing-xl);
}

.unlock-success-balance strong {
  color: var(--accent-secondary);
}

.unlock-success-actions {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  max-width: 280px;
  margin: 0 auto;
}

.unlock-success-play {
  background: linear-gradient(135deg, var(--accent-primary), #22c55e) !important;
  border: none !important;
  font-weight: 600;
  padding: var(--spacing-md) var(--spacing-xl) !important;
  font-size: 1rem;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
  transition: all var(--transition-normal);
}

.unlock-success-play:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(16, 185, 129, 0.4);
}

.unlock-success-close {
  font-size: 0.9rem;
}

@media (max-width: 768px) {
  .topic-icon-large {
    font-size: 3rem;
  }

  .unlock-success-title {
    font-size: 1.5rem;
  }

  .unlock-success-message {
    font-size: 0.9rem;
    padding: var(--spacing-sm);
  }
}

/* Feedback Modal */
.feedback-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: var(--spacing-md);
}

.feedback-modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  width: 100%;
  max-width: 420px;
  animation: feedbackSlideIn 0.2s ease;
}

@keyframes feedbackSlideIn {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.95);
  }

  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.feedback-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
}

.feedback-modal-header h3 {
  margin: 0;
  font-size: 1rem;
  color: var(--text-primary);
}

.feedback-modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0;
  line-height: 1;
  transition: color var(--transition-fast);
}

.feedback-modal-close:hover {
  color: var(--text-primary);
}

#feedback-form {
  padding: var(--spacing-lg);
}

.feedback-type-selector {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.feedback-type-option {
  flex: 1;
  cursor: pointer;
}

.feedback-type-option input {
  display: none;
}

.feedback-type-label {
  display: block;
  text-align: center;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.875rem;
  transition: all var(--transition-fast);
}

.feedback-type-option input:checked+.feedback-type-label {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: var(--bg-primary);
  font-weight: 600;
}

.feedback-type-option:hover .feedback-type-label {
  border-color: var(--accent-primary);
}

.feedback-textarea {
  width: 100%;
  min-height: 120px;
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-family);
  font-size: 0.9rem;
  resize: vertical;
  transition: border-color var(--transition-fast);
}

.feedback-textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
}

.feedback-textarea::placeholder {
  color: var(--text-muted);
}

.feedback-char-count {
  text-align: right;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
}

.feedback-submit {
  width: 100%;
}

.feedback-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

@media (max-width: 480px) {

  .feedback-modal {
    max-width: 100%;
    margin: var(--spacing-sm);
  }
}

/* ============================================
   Report User Modal
   ============================================ */
.modal-content {
  position: relative;
  width: 100%;
  max-width: 500px;
  background: var(--bg-card);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
}

.report-modal {
  max-width: 500px;
}

.report-modal .modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--border-color);
  margin-bottom: var(--spacing-md);
}

.report-modal .modal-header h2 {
  margin: 0;
  font-size: 1.25rem;
}

.report-modal .modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0;
  line-height: 1;
}

.report-modal .modal-close:hover {
  color: var(--text-primary);
}

.modal-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: flex-end;
  margin-top: var(--spacing-lg);
}

.modal-actions .btn {
  min-width: 100px;
}

.report-target {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

.report-target strong {
  color: var(--text-primary);
}

.report-reasons {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.report-reason-option {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.report-reason-option:hover {
  background: var(--bg-tertiary);
}

.report-reason-option input[type="radio"] {
  accent-color: var(--accent-danger);
}

.report-reason-option.selected {
  border-color: var(--accent-danger);
  background: rgba(239, 68, 68, 0.1);
}

.form-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: flex-end;
  margin-top: var(--spacing-lg);
}

/* ============================================
   Moderation Notice Modal
   ============================================ */
.moderation-notice {
  max-width: 450px;
  text-align: center;
  padding: var(--spacing-xl);
}

.moderation-notice-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
}

.moderation-notice h2 {
  margin-bottom: var(--spacing-md);
  color: var(--accent-danger);
}

.moderation-notice p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

.moderation-notice-details {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  text-align: left;
}

.moderation-notice-details .detail-row {
  display: flex;
  justify-content: space-between;
  padding: var(--spacing-xs) 0;
}

.moderation-notice-details .detail-row:not(:last-child) {
  border-bottom: 1px solid var(--border-color);
}

.moderation-notice-details .detail-label {
  color: var(--text-muted);
}

.moderation-notice-details .detail-value {
  color: var(--text-primary);
  font-weight: 500;
}

/* Warning Acknowledgment Modal */
.warning-notice {
  text-align: center;
  max-width: 500px;
}

.warning-notice-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.warning-notice h2 {
  color: var(--accent-warning);
  margin-bottom: 0.5rem;
}

.warning-intro {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.warning-details {
  background: var(--surface-alt);
  border-radius: 8px;
  padding: 1rem;
  margin-bottom: 1.5rem;
  text-align: left;
}

.warning-details .detail-row {
  display: flex;
  justify-content: space-between;
  padding: 0.5rem 0;
}

.warning-details .detail-row:not(:last-child) {
  border-bottom: 1px solid var(--border-color);
}

.warning-details .detail-label {
  color: var(--text-muted);
}

.warning-details .detail-value {
  color: var(--text-primary);
  font-weight: 500;
}

.warning-consequence {
  background: rgba(var(--accent-warning-rgb, 255, 193, 7), 0.1);
  border-left: 3px solid var(--accent-warning);
  padding: 1rem;
  margin-bottom: 1.5rem;
  text-align: left;
  border-radius: 0 8px 8px 0;
  font-size: 0.9rem;
}

.warning-consequence strong {
  color: var(--accent-warning);
}

#warning-acknowledge-btn {
  width: 100%;
}

/* Report button in profile */
.btn-report {
  background: transparent;
  border: 1px solid var(--accent-danger);
  color: var(--accent-danger);
}

.btn-report:hover {
  background: var(--accent-danger);
  color: white;
}

/* ============================================
   GAME MODE STYLES
   ============================================ */

/* Game Mode Selector in Create Room Modal */
.game-mode-selector {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-sm);
}

.game-mode-option {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--spacing-md);
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
}

.game-mode-option:hover {
  border-color: var(--text-muted);
}

.game-mode-option.selected {
  border-width: 3px;
}

.game-mode-casual.selected {
  border-color: #4ade80;
  background: rgba(74, 222, 128, 0.1);
}

/* ============================================
   Footer
   ============================================ */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  color: var(--text-secondary);
  margin-top: auto;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-2xl) var(--spacing-lg) var(--spacing-lg);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr 1fr;
  gap: var(--spacing-xl);
}

.footer-section {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

/* Brand */
.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.15rem;
  transition: opacity var(--transition-fast);
}

.footer-logo:hover {
  opacity: 0.85;
  color: var(--text-primary);
}

.footer-logo-text {
  letter-spacing: -0.5px;
}

.footer-tagline {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-top: var(--spacing-xs);
}

/* Headings */
.footer-heading {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.footer-description {
  font-size: 0.825rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Links */
.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-link {
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
  padding: 2px 0;
  width: fit-content;
}

.footer-link:hover,
.footer-link:focus-visible {
  color: var(--accent-primary);
}

/* Social icons */
.footer-social-icons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-xs);
}

.footer-social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--border-radius);
  color: var(--text-muted);
  background: transparent;
  transition: color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
}

.footer-social-link:hover,
.footer-social-link:focus-visible {
  color: var(--accent-primary);
  background: rgba(74, 222, 128, 0.1);
  transform: translateY(-2px);
}

[data-theme="light"] .footer-social-link:hover,
[data-theme="light"] .footer-social-link:focus-visible {
  color: var(--accent-primary);
  background: rgba(5, 150, 105, 0.08);
}

.footer-social-link svg {
  display: block;
}

/* Bottom bar */
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-2xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--border-color);
}

.footer-legal {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.footer-legal-link {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-legal-link:hover,
.footer-legal-link:focus-visible {
  color: var(--text-secondary);
}

.footer-legal-sep {
  color: var(--text-muted);
  opacity: 0.5;
  font-size: 0.75rem;
}

.footer-copyright {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ---- Responsive ---- */
@media (max-width: 900px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl) var(--spacing-lg);
  }
}

@media (max-width: 560px) {
  .footer-inner {
    padding: var(--spacing-xl) var(--spacing-md) var(--spacing-md);
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xl);
  }
}

.game-mode-ranked.selected {
  border-color: #f59e0b;
  background: rgba(245, 158, 11, 0.1);
}

/* Topic Detail Modal */
.topic-detail-modal {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.topic-detail-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--spacing-xs);
}

.topic-detail-icon {
  font-size: 2.75rem;
  line-height: 1;
}

.topic-detail-name {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.3;
}

.topic-detail-category {
  font-size: 0.8rem;
  color: var(--text-muted);
  background: var(--bg-secondary);
  padding: 2px 10px;
  border-radius: 12px;
}

.topic-detail-description {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
  text-align: center;
}

.topic-detail-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-sm);
}

.topic-detail-questions {
  font-size: 0.8rem;
  color: var(--text-muted);
  background: var(--bg-secondary);
  padding: 3px 10px;
  border-radius: 12px;
}

.topic-detail-featured {
  font-size: 0.8rem;
  color: var(--accent-warning);
  background: rgba(251, 191, 36, 0.1);
  padding: 3px 10px;
  border-radius: 12px;
}

.topic-detail-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-xs);
}

.topic-detail-actions .btn {
  flex: 1;
  min-width: 0;
}

.topic-detail-actions .btn-outline {
  flex-basis: 100%;
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.8125rem;
  padding: var(--spacing-xs) var(--spacing-sm);
}

.topic-detail-actions .btn-outline:hover {
  border-color: var(--accent-primary);
  color: var(--text-primary);
}

.game-mode-option .mode-icon {
  font-size: 2rem;
  margin-bottom: var(--spacing-xs);
}

.game-mode-option .mode-label {
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: var(--spacing-xs);
}



.game-mode-option .mode-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ============================================
   CREATE ROOM MODAL - COMPACT LAYOUT
   ============================================ */

/* Compact form group - reduced spacing */
.form-group.compact {
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-sm);
}

.form-group.compact label {
  font-size: 0.8rem;
  margin-bottom: 2px;
}

/* Compact game mode selector - smaller buttons */
.game-mode-selector.compact {
  gap: var(--spacing-sm);
  margin-top: 0;
}

.game-mode-option.compact {
  padding: var(--spacing-sm) var(--spacing-md);
  flex: 1;
}

.game-mode-option.compact .mode-icon {
  font-size: 1.2rem;
  margin-bottom: 2px;
}

.game-mode-option.compact .mode-label {
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0;
}



.game-mode-option.compact .mode-desc {
  display: none;
}

/* Label with tooltip styling */
.label-with-tooltip {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  margin-bottom: 2px;
}

.label-with-tooltip label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin: 0;
}

/* Tooltip button */
.tooltip-btn {
  position: relative;
  width: 18px;
  height: 18px;
  min-width: 18px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  background: transparent;
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 700;
  cursor: help;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  padding: 0;
}

.tooltip-btn:hover {
  border-color: var(--text-secondary);
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.05);
}

/* Tooltip popup */
.tooltip-btn.active::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 125%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 0.75rem;
  white-space: nowrap;
  z-index: 1000;
  box-shadow: var(--shadow-md);
  font-weight: 400;
  color: var(--text-secondary);
}

.tooltip-btn.active::before {
  content: '';
  position: absolute;
  bottom: 120%;
  left: 50%;
  width: 6px;
  height: 6px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  transform: translateX(-50%) rotate(45deg);
  z-index: 1000;
}

/* Form row for side-by-side inputs */
.form-row {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}

.form-row .form-group {
  margin-bottom: 0;
}

.flex-1 {
  flex: 1;
}

/* Advanced settings collapsible */
.advanced-settings-toggle {
  margin: var(--spacing-sm) 0;
}

.advanced-settings-toggle summary {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  user-select: none;
  padding: var(--spacing-sm);
  border-radius: var(--border-radius);
  transition: background var(--transition-fast);
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  outline: none;
}

.advanced-settings-toggle summary:hover {
  background: var(--bg-secondary);
}

.advanced-settings-toggle .toggle-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  transition: transform var(--transition-fast);
  font-weight: 700;
  color: var(--accent-primary);
}

.advanced-settings-toggle[open] .toggle-icon {
  transform: rotate(45deg);
}

.advanced-settings-content {
  padding: var(--spacing-sm) var(--spacing-sm) 0 var(--spacing-sm);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.advanced-settings-toggle .form-group {
  margin-bottom: var(--spacing-xs);
}



.label-with-tooltip .elo-range-value {
  margin-left: auto;
  background: transparent;
  padding: 0;
  font-size: 0.9rem;
}

/* Mode Badge in Room Cards */
.room-mode-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
}

.room-mode-badge.casual {
  background: #22c55e;
  color: #fff;
}

.room-mode-badge.ranked {
  background: #f59e0b;
  color: #fff;
}

/* ELO Range Badge in Room Cards */
.room-elo-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 6px;
  border-radius: 8px;
  font-size: 0.7rem;
  font-weight: 500;
  background: var(--bg-tertiary);
  color: var(--text-muted);
  margin-left: 4px;
}

.room-elo-badge.open {
  color: var(--accent-primary);
}

/* AI Generated Badge in Room Cards */
.room-ai-badge {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 2px 8px;
  border-radius: 8px;
  font-size: 0.7rem;
  font-weight: 600;
  background: linear-gradient(135deg, #9333ea, #6366f1);
  color: white;
  white-space: nowrap;
}

/* ELO Restriction in Lobby */
.room-elo-restriction {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: var(--spacing-xs);
}

.room-elo-restriction.open {
  color: var(--accent-primary);
}

/* Inline mode indicator in lobby (next to topic) */
.room-mode-indicator {
  display: inline-block;
  padding: 2px 8px;
  border-radius: var(--border-radius);
  font-size: 0.8rem;
  font-weight: 600;
  vertical-align: middle;
}

.room-mode-indicator.casual {
  background: #22c55e;
  color: #fff;
}

.room-mode-indicator.ranked {
  background: #f59e0b;
  color: #fff;
}

/* Ranked Warning Banner */
.ranked-warning-banner {
  background: #fef3c7;
  border: 1px solid #f59e0b;
  color: #92400e;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-md);
  text-align: center;
  font-size: 0.9rem;
  font-weight: 500;
}

[data-theme="dark"] .ranked-warning-banner {
  background: rgba(245, 158, 11, 0.2);
  border-color: rgba(245, 158, 11, 0.5);
  color: #fcd34d;
}

.ranked-warning-banner.hidden {
  display: none;
}

/* ============================================
   TOPIC TYPE SELECTOR (Create Room Modal)
   ============================================ */

.topic-type-selector {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: 0;
}

.topic-type-option {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
}

.topic-type-option:hover {
  border-color: var(--text-muted);
}

.topic-type-option.selected {
  border-width: 3px;
}

.topic-type-option[data-type="predefined"].selected {
  border-color: #3b82f6;
  background: rgba(59, 130, 246, 0.1);
}

.topic-type-option[data-type="ai"].selected {
  border-color: #9333ea;
  background: rgba(147, 51, 234, 0.1);
}

.topic-type-option.disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
  filter: grayscale(100%);
  border: 2px solid var(--border-color);
}

.topic-type-option.disabled .type-icon {
  opacity: 0.5;
}

.topic-type-option.disabled .type-label {
  color: var(--text-muted);
}

.topic-type-option .type-icon {
  font-size: 1.2rem;
}

.topic-type-option .type-label {
  font-weight: 600;
  font-size: 0.875rem;
}

/* AI Topic Creation Section in Modal */
.ai-topic-create-wrapper {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  align-items: stretch;
}

.ai-topic-create-wrapper .input {
  flex: 1;
  width: 100%;
}

.ai-credits-info {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  background: linear-gradient(135deg, #9333ea, #6366f1);
  color: white;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius);
  font-size: 0.8rem;
  font-weight: 600;
  white-space: normal;
  text-align: center;
}

.spark-icon {
  font-size: 0.9rem;
}

.ai-topic-create-hint {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin: var(--spacing-xs) 0 0 0;
}

.ai-topic-create-note {
  font-size: 0.7rem;
  color: #f59e0b;
  margin: var(--spacing-xs) 0 0 0;
  font-weight: 500;
}



[data-theme="dark"] .topic-type-option[data-type="predefined"].selected {
  background: rgba(59, 130, 246, 0.2);
}

[data-theme="dark"] .topic-type-option[data-type="ai"].selected {
  background: rgba(147, 51, 234, 0.2);
}

/* ============================================
   AI TOPIC GENERATION STYLES
   ============================================ */

.ai-topic-section {
  background: linear-gradient(135deg, #9333ea15, #6366f115);
  border: 1px solid #9333ea40;
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.ai-topic-section.hidden {
  display: none;
}

.ai-topic-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.ai-icon {
  font-size: 1.5rem;
}

.ai-title {
  font-weight: 600;
  font-size: 1.1rem;
  flex: 1;
}

.spark-credits-display {
  background: linear-gradient(135deg, #9333ea, #6366f1);
  color: white;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius);
  font-size: 0.85rem;
  font-weight: 600;
}

.ai-topic-form {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.ai-topic-input {
  flex: 1;
}

.ai-topic-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin: 0;
}

.ai-generation-status {
  margin-top: var(--spacing-sm);
  padding: var(--spacing-sm);
  border-radius: var(--border-radius);
  background: var(--bg-card);
  text-align: center;
}

.ai-generation-status.hidden {
  display: none;
}

.ai-generating {
  color: #9333ea;
  font-weight: 500;
  animation: pulse 2s infinite;
}

@keyframes pulse {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.5;
  }
}

.ai-generated-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  background: linear-gradient(135deg, #9333ea, #6366f1);
  color: white;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--border-radius);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
}

.ai-generated-badge.hidden {
  display: none;
}

.ai-badge-icon {
  font-size: 1rem;
}

[data-theme="dark"] .ai-topic-section {
  background: linear-gradient(135deg, #9333ea25, #6366f125);
  border-color: #9333ea60;
}

/* ELO Display in Results */
.elo-result {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-weight: 600;
}

.elo-result.positive {
  color: #4ade80;
}



.elo-result.negative {
  color: #ef4444;
}



.elo-result.neutral {
  color: var(--text-muted);
}

.room-card {
  position: relative;
}

/* Ranked results banner */
.ranked-results-banner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-radius: var(--border-radius);
  padding: var(--spacing-md) var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.ranked-results-banner .ranked-badge {
  font-weight: 600;
  color: #f59e0b;
}

.ranked-results-banner .ranked-notice {
  color: var(--text-muted);
  font-size: 0.9rem;
}



.elo-change-display.positive {
  color: #4ade80;
}

/* ============================================
   MOBILE - CREATE ROOM MODAL OPTIMIZATIONS
   ============================================ */

@media (max-width: 480px) {
  .modal {
    max-width: 95vw;
    max-height: 90vh;
    overflow-y: auto;
    overflow-x: hidden;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    -webkit-overflow-scrolling: touch;
  }

  .modal h2 {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-md);
    position: sticky;
    top: 0;
    background: var(--bg-card);
    padding: 0 0 var(--spacing-sm) 0;
    z-index: 10;
  }

  .form {
    gap: var(--spacing-sm);
  }

  .form-group.compact {
    margin-bottom: var(--spacing-xs);
  }

  /* Stack form row vertically on very small screens */
  .form-row {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .form-row .form-group {
    width: 100%;
  }

  /* Tooltip positioning on mobile - show below since there's more vertical space */
  .tooltip-btn.active::after {
    bottom: auto;
    top: 125%;
    white-space: normal;
    max-width: 150px;
    word-wrap: break-word;
  }

  .tooltip-btn.active::before {
    bottom: auto;
    top: 120%;
  }

  /* Game mode selector on mobile */
  .game-mode-selector.compact {
    gap: var(--spacing-sm);
  }

  .game-mode-option.compact {
    padding: var(--spacing-sm);
  }

  .game-mode-option.compact .mode-icon {
    font-size: 1.3rem;
  }

  .game-mode-option.compact .mode-label {
    font-size: 0.8rem;
  }

  /* Topic type selector on mobile - stack vertically for better fit */
  .topic-type-selector {
    flex-direction: column;
    gap: var(--spacing-xs);
  }

  .topic-type-option {
    padding: var(--spacing-xs) var(--spacing-sm);
    flex-direction: column;
    gap: 2px;
  }

  .topic-type-option .type-icon {
    font-size: 1rem;
  }

  .topic-type-option .type-label {
    font-size: 0.75rem;
  }

  /* Ensure submit button is always accessible at the bottom */
  .btn.btn-primary.btn-block {
    position: sticky;
    bottom: 0;
    margin-left: -var(--spacing-lg);
    margin-right: -var(--spacing-lg);
    margin-bottom: -var(--spacing-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: 0;
    margin-top: var(--spacing-md);
  }

  /* Make scrolling smoother for modal content */
  .modal::-webkit-scrollbar {
    width: 6px;
  }

  .modal::-webkit-scrollbar-track {
    background: transparent;
  }

  .modal::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
  }

  .modal::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
  }
}

/* ============================================
   LOADING & ERROR PLACEHOLDERS
   ============================================ */

.loading-placeholder,
.error-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
  text-align: center;
  color: var(--text-secondary);
  min-height: 120px;
  grid-column: 1 / -1;
  /* Span all grid columns */
}

.loading-placeholder::before {
  content: '';
  width: 32px;
  height: 32px;
  border: 3px solid var(--border-color);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  margin-bottom: var(--spacing-sm);
  animation: spin 0.8s linear infinite;
}

.error-placeholder {
  color: var(--error);
}

.error-placeholder p {
  margin-bottom: var(--spacing-md);
}

.error-placeholder .btn {
  margin-top: var(--spacing-sm);
}

/* Skeleton loading cards for topics */
.topic-card-skeleton {
  pointer-events: none;
}

.skeleton-block {
  display: inline-block;
  background: var(--border-color);
  animation: skeleton-pulse 1.2s ease-in-out infinite;
}

.answer-btn-skeleton {
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

@keyframes skeleton-pulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 0.8; }
}

/* ============================================
   AI GENERATION LOADING OVERLAY
   ============================================ */

.ai-loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  backdrop-filter: blur(4px);
}

.ai-loading-overlay.hidden {
  display: none;
}

.ai-loading-content {
  text-align: center;
  color: white;
  max-width: 400px;
  animation: fadeInScale 0.3s ease-out;
}

@keyframes fadeInScale {
  from {
    opacity: 0;
    transform: scale(0.9);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

.ai-loading-spinner {
  margin-bottom: var(--spacing-lg);
}

.spinner {
  width: 80px;
  height: 80px;
  margin: 0 auto;
  border: 4px solid rgba(255, 255, 255, 0.2);
  border-top-color: #9333ea;
  border-right-color: #6366f1;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.ai-loading-content h2 {
  font-size: 1.8rem;
  margin: var(--spacing-md) 0;
  font-weight: 700;
  background: linear-gradient(135deg, #9333ea, #6366f1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.ai-loading-content p {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.9);
  margin: var(--spacing-sm) 0;
  line-height: 1.5;
}

.ai-loading-subtitle {
  font-size: 0.85rem !important;
  color: rgba(255, 255, 255, 0.6) !important;
  margin-top: var(--spacing-md) !important;
}

.ai-loading-progress {
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
  margin-top: var(--spacing-lg);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, #9333ea, #6366f1, #3b82f6);
  border-radius: 2px;
  animation: progress 2s ease-in-out infinite;
  width: 100%;
}

@keyframes progress {
  0% {
    transform: translateX(-100%);
  }

  50% {
    transform: translateX(0%);
  }

  100% {
    transform: translateX(100%);
  }
}

/* ============================================
   Game Callout Notifications
   ============================================ */
.callout-anchor {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  z-index: 99;
  display: flex;
  justify-content: center;
  pointer-events: none;
}

.game-callout {
  padding: 6px 24px;
  font-weight: 600;
  font-size: 0.82rem;
  text-align: center;
  letter-spacing: 0.03em;

  max-width: min(90vw, 500px);
  border-radius: 0 0 var(--border-radius) var(--border-radius);
  box-shadow: 0 3px 12px rgba(0, 0, 0, 0.3);
  animation: callout-enter 0.3s cubic-bezier(0.22, 1, 0.36, 1) forwards;
  will-change: transform, opacity;
  pointer-events: auto;
}

.callout-name {
  font-weight: 900;
}



.took-the-lead .callout-name {
  text-decoration-color: rgba(0, 0, 0, 0.4);
}



.on-streak .callout-name {
  text-decoration-color: rgba(255, 255, 255, 0.5);
}


.game-callout.fading {
  animation: callout-fade 1.5s ease forwards;
}



.game-callout.took-the-lead {
  background: linear-gradient(135deg, #5b6af0, #069580);
  color: #fff;
}



.game-callout.on-streak {
  background: linear-gradient(135deg, #ffda73, #ffd0aa);
  color: #630000;
}



@keyframes callout-enter {
  from {
    transform: translateY(-100%);
    opacity: 0;
  }

  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes callout-fade {
  from {
    opacity: 1;
  }

  to {
    opacity: 0;
  }
}

@media (max-width: 768px) {
  .game-callout {
    font-size: 0.75rem;
    padding: 5px 16px;
  }
}

/* ============================================
   Mobile Gameplay — Full-Screen Experience
   ============================================ */

/* Back/leave button in game header (hidden on desktop) */
.game-back-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: 50%;
  transition: background 0.15s, color 0.15s;
  -webkit-tap-highlight-color: transparent;
  flex-shrink: 0;
}

.game-back-btn:hover,
.game-back-btn:active {
  background: var(--bg-hover);
  color: var(--text-primary);
}

/* Pulse animation for timer danger state */
@keyframes mobileTimerPulse {
  from { background: rgba(239, 68, 68, 0.15); }
  to { background: rgba(239, 68, 68, 0.35); }
}

@media (max-width: 768px) {
  /* --- 1. Hide main app header during gameplay --- */
  body.game-active .header {
    display: none;
  }

  /* --- 2. Remove header offset from main content --- */
  body.game-active .main {
    margin-top: 0;
    padding: 0;
  }

  /* --- 3. Game container: full-width with topbar offset --- */
  body.game-active .game {
    max-width: none;
    padding: 80px var(--spacing-md) var(--spacing-md);
    /* 44px topbar + ~28px topic strip + 8px breathing room */
  }

  /* --- 4. Game header → fixed compact topbar --- */
  body.game-active .game-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 90;
    height: 44px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 0 12px;
    margin-bottom: 0;
    gap: 8px;
    flex-wrap: nowrap;
  }

  /* --- 5. Show back button (leftmost) --- */
  body.game-active .game-back-btn {
    display: flex;
    order: 0;
  }

  /* --- 6. Question info: true-centered on screen via absolute positioning --- */
  body.game-active .question-info {
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 0;
    pointer-events: none;
  }

  body.game-active .question-number {
    font-size: 0.9rem;
    pointer-events: auto;
  }

  /* --- 7. Topic name: fixed strip below topbar with fade lines --- */
  body.game-active .topic-name {
    position: fixed;
    top: 44px;
    left: 0;
    right: 0;
    z-index: 89;
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: none;
    overflow: visible;
    text-overflow: unset;
    white-space: nowrap;
    border-radius: 0;
    border: none !important;
    border-bottom: 1px solid var(--border-subtle) !important;
    padding: 5px 20px;
    margin: 0;
    font-size: 0.8rem;
    background: var(--bg-primary) !important;
  }

  body.game-active .topic-name::before,
  body.game-active .topic-name::after {
    content: '';
    flex: 0 1 60px;
    height: 1px;
  }

  body.game-active .topic-name::before {
    margin-right: 12px;
    background: linear-gradient(to left, var(--border-color), transparent);
  }

  body.game-active .topic-name::after {
    margin-left: 12px;
    background: linear-gradient(to right, var(--border-color), transparent);
  }

  /* --- 8. Timer: compact inline pill (replaces 64px circle) --- */
  body.game-active .timer {
    margin-left: auto;
    position: static;
    transform: none;
    width: auto;
    height: auto;
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    border-radius: 999px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    flex-shrink: 0;
    transition: background 0.3s, border-color 0.3s;
  }

  /* Timer icon via pseudo-element */
  body.game-active .timer::before {
    content: '⏱';
    font-size: 0.85rem;
    line-height: 1;
  }

  /* Hide circular progress ring — pill shows number only */
  body.game-active .timer-bar {
    display: none;
  }

  /* Timer text: inline, compact */
  body.game-active .timer-text {
    position: static;
    font-size: 0.95rem;
    font-weight: 700;
    min-width: 2ch;
    text-align: center;
  }

  /* Timer warning state (≤5s) */
  body.game-active .timer.warning {
    background: rgba(245, 158, 11, 0.2);
    border-color: var(--accent-warning);
  }

  body.game-active .timer.warning .timer-text {
    color: var(--accent-warning);
  }

  /* Timer danger state (≤3s) with pulse */
  body.game-active .timer.danger {
    background: rgba(239, 68, 68, 0.25);
    border-color: var(--accent-danger);
    animation: mobileTimerPulse 0.6s ease-in-out infinite alternate;
  }

  body.game-active .timer.danger .timer-text {
    color: var(--accent-danger);
  }

  /* --- 9. Question info: true-centered (back btn left, timer right) --- */

  body.game-active .question-number {
    font-size: 0.9rem;
  }

  /* --- Timer stays order 2 (rightmost) --- */

  /* --- 11. Question text: slightly tighter --- */
  body.game-active .question-text {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-md);
  }

  /* --- 12. Compact scoreboard --- */
  body.game-active .scoreboard {
    padding: var(--spacing-sm);
    gap: var(--spacing-xs);
    margin-top: var(--spacing-xs);
  }

  body.game-active .score-item {
    font-size: 0.8rem;
    padding: 2px var(--spacing-xs);
  }

  /* --- 12. Hide bottom leave button (back arrow in topbar replaces it) --- */
  body.game-active .quit-game-bottom {
    display: none;
  }
}