/* ============================================
   Interview Arena — Design System
   Premium dark-mode UI with glassmorphism
   ============================================ */

/* === Google Fonts === */
@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@300;400;500;600;700&family=IBM+Plex+Mono:wght@400;500;600&family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400&display=swap');

/* === CSS Custom Properties === */
:root {
  /* Default: Light Mode (Warm off-white theme matched to ts-age) */
  --bg-primary: #fafaf9;
  --bg-secondary: #1c1c1a; /* Sidebar background (always dark) */
  --bg-tertiary: #f2f2ef;
  --bg-card: #ffffff;
  --bg-card-hover: #f2f2ef;
  --border-color: #d4d4c8;
  --grid-color: rgba(28, 28, 26, 0.02);

  /* Glass Effect */
  --glass-bg: #ffffff;
  --glass-border: #d4d4c8;
  --glass-blur: none;
  --glass-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);

  /* Text Colors */
  --text-primary: #1c1c1a;
  --text-secondary: #4a4a44;
  --text-muted: #8a8a80;
  --text-accent: #6d28d9;

  /* Accent Colors */
  --accent-violet: #6d28d9;
  --accent-blue: #1d4ed8;
  --accent-cyan: #0f766e;
  --accent-emerald: #15803d;
  --accent-amber: #b45309;
  --accent-red: #b91c1c;
  --accent-pink: #be185d;

  /* Accent Gradient */
  --gradient-primary: linear-gradient(135deg, var(--accent-violet), var(--accent-blue));
  --gradient-warm: linear-gradient(135deg, var(--accent-amber), var(--accent-red));
  --gradient-success: linear-gradient(135deg, var(--accent-emerald), var(--accent-cyan));
  --gradient-purple: linear-gradient(135deg, var(--accent-violet), var(--accent-pink));

  /* Persona Colors */
  --persona-architect: var(--accent-blue);
  --persona-qa-lead: var(--accent-emerald);
  --persona-delivery: var(--accent-amber);
  --persona-hr: var(--accent-pink);

  /* Score Colors */
  --score-exceptional: var(--accent-emerald);
  --score-good: var(--accent-cyan);
  --score-average: var(--accent-amber);
  --score-fail: var(--accent-red);

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Typography (Matched to ts-age) */
  --font-sans: 'IBM Plex Sans', system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
  --font-serif: 'Playfair Display', Georgia, serif;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 500ms;
}

/* === Dark Mode Overrides === */
[data-theme="dark"] {
  --bg-primary: #121212;
  --bg-secondary: #1c1c1a;
  --bg-tertiary: #1e1e1e;
  --bg-card: rgba(255, 255, 255, 0.02);
  --bg-card-hover: rgba(255, 255, 255, 0.05);
  --border-color: #3a3a3a;
  --grid-color: rgba(255, 255, 255, 0.015);

  --glass-bg: rgba(255, 255, 255, 0.02);
  --glass-border: #3a3a3a;
  --glass-blur: blur(12px);
  --glass-shadow: 0 4px 20px rgba(0, 0, 0, 0.35);

  --text-primary: #e4e4e4;
  --text-secondary: #b0b0b0;
  --text-muted: #949494;
  --text-accent: #a78bfa;

  --accent-violet: #a78bfa;
  --accent-blue: #60a5fa;
  --accent-cyan: #5eead4;
  --accent-emerald: #4ade80;
  --accent-amber: #fbbf24;
  --accent-red: #f87171;
  --accent-pink: #fb7185;

  --gradient-primary: linear-gradient(135deg, var(--accent-violet), var(--accent-blue));
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* === Background Grid Pattern === */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(circle at 25% 25%, rgba(124, 58, 237, 0.04) 0%, transparent 50%),
    radial-gradient(circle at 75% 75%, rgba(59, 130, 246, 0.04) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

/* === App Container === */
#app {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* === Scrollbar === */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* ============================================
   WELCOME SCREEN
   ============================================ */

.welcome-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: var(--space-2xl);
  animation: fadeIn 0.8s var(--ease-out);
}

.welcome-logo {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-xl);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
  margin-bottom: var(--space-lg);
  box-shadow: 0 0 40px rgba(124, 58, 237, 0.3);
  animation: float 3s ease-in-out infinite;
}

.welcome-title {
  font-family: var(--font-serif);
  font-size: 3rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-md);
  text-align: center;
  letter-spacing: -1px;
}

.welcome-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  text-align: center;
  max-width: 560px;
  margin-bottom: var(--space-3xl);
  line-height: 1.7;
}

.welcome-profile-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  backdrop-filter: var(--glass-blur);
  padding: var(--space-xl);
  max-width: 600px;
  width: 100%;
  margin-bottom: var(--space-2xl);
}

.welcome-profile-card h3 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--text-muted);
  margin-bottom: var(--space-md);
}

.profile-name {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.profile-role {
  color: var(--text-accent);
  font-weight: 500;
  margin-bottom: var(--space-md);
}

.profile-details {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.profile-tag {
  background: rgba(124, 58, 237, 0.1);
  border: 1px solid rgba(124, 58, 237, 0.2);
  color: var(--text-accent);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 500;
}

.welcome-rounds {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  max-width: 600px;
  width: 100%;
  margin-bottom: var(--space-2xl);
}

.round-preview {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  text-align: center;
  transition: all var(--duration-normal) var(--ease-out);
}

.round-preview:hover {
  background: var(--bg-card-hover);
  border-color: rgba(255, 255, 255, 0.15);
  transform: translateY(-2px);
}

.round-preview .round-num {
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.round-preview .round-name {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-top: var(--space-xs);
}

/* === Primary Button === */
.btn-primary {
  background: var(--gradient-primary);
  color: white;
  border: none;
  padding: 14px 40px;
  border-radius: var(--radius-full);
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
  position: relative;
  overflow: hidden;
  letter-spacing: 0.3px;
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.2), transparent);
  opacity: 0;
  transition: opacity var(--duration-normal);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(124, 58, 237, 0.35);
}

.btn-primary:hover::before {
  opacity: 1;
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: var(--glass-bg);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
  padding: 12px 28px;
  border-radius: var(--radius-full);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
  backdrop-filter: var(--glass-blur);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: rgba(255, 255, 255, 0.15);
}

.btn-icon {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: var(--space-sm);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-icon:hover {
  background: var(--glass-bg);
  color: var(--text-primary);
}

/* ============================================
   INTERVIEW LAYOUT — Main Stage
   ============================================ */

.interview-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: 100vh;
  animation: fadeIn 0.5s var(--ease-out);
}

/* === Left Sidebar === */
.sidebar {
  background: #1c1c1a !important;
  border-right: 1px solid #333 !important;
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  z-index: 1000;
  transition: transform var(--duration-normal) var(--ease-out);
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-normal) var(--ease-out);
}

.sidebar-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.sidebar-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid #333;
}

.sidebar-logo {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.sidebar-title {
  font-family: "Playfair Display", "Georgia", "Garamond", serif;
  font-size: 1.3rem;
  font-weight: 600;
  font-style: italic;
  color: #c8c8c8;
  letter-spacing: 0.5px;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

/* Interviewer Avatar Section */
.interviewer-section {
  text-align: center;
  padding: var(--space-lg) 0;
}

.interviewer-avatar {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  margin: 0 auto var(--space-md);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 40px;
  background: var(--bg-tertiary);
}

.interviewer-avatar::after {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  border: 2px solid transparent;
  animation: avatarPulse 2s ease-in-out infinite;
}

.interviewer-avatar[data-persona="architect"]::after {
  border-color: var(--persona-architect);
  box-shadow: 0 0 20px rgba(59, 130, 246, 0.3);
}

.interviewer-avatar[data-persona="qa-lead"]::after {
  border-color: var(--persona-qa-lead);
  box-shadow: 0 0 20px rgba(16, 185, 129, 0.3);
}

.interviewer-avatar[data-persona="delivery"]::after {
  border-color: var(--persona-delivery);
  box-shadow: 0 0 20px rgba(245, 158, 11, 0.3);
}

.interviewer-avatar[data-persona="hr"]::after {
  border-color: var(--persona-hr);
  box-shadow: 0 0 20px rgba(217, 70, 239, 0.3);
}

.interviewer-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.interviewer-role {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* Round Progress / Sidebar Accordion Index */
.round-progress {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sidebar-round-group {
  display: flex;
  flex-direction: column;
}

.sidebar-round-btn {
  display: flex;
  align-items: center;
  width: 100%;
  background: transparent;
  border: 1px solid transparent;
  color: #b0b0b0;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
  text-align: left;
  user-select: none;
  gap: 10px;
}

.sidebar-round-btn:hover {
  background: rgba(255, 255, 255, 0.05);
  color: #e4e4e4;
}

.sidebar-round-btn.active {
  background: rgba(255, 255, 255, 0.02);
  border-color: #3a3a3a;
  color: #e4e4e4;
}

.sidebar-round-btn .round-caret {
  font-size: 0.7rem;
  transition: transform var(--duration-normal) var(--ease-out);
  color: #949494;
  display: inline-block;
}

.sidebar-round-btn.expanded .round-caret {
  transform: rotate(90deg);
}

.sidebar-round-btn .round-progress-badge {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  background: rgba(255, 255, 255, 0.04);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  margin-left: auto;
  color: #949494;
  font-weight: 500;
}

.sidebar-round-btn.active .round-progress-badge {
  background: rgba(167, 139, 250, 0.15);
  color: #a78bfa;
}

.sidebar-q-list {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.25s ease;
  opacity: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-left: 10px;
  margin-top: 4px;
  border-left: 1px solid rgba(255, 255, 255, 0.05);
}

.sidebar-q-list.expanded {
  max-height: 2000px;
  opacity: 1;
}

.sidebar-q-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-xs);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  color: #949494;
  text-decoration: none;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  line-height: 1.4;
  transition: all var(--duration-fast) var(--ease-out);
  cursor: pointer;
  user-select: none;
  text-align: left;
  border-left: 2px solid transparent;
}

.sidebar-q-item:hover {
  color: #e4e4e4;
  background: rgba(255, 255, 255, 0.02);
}

.sidebar-q-item.active {
  color: #e4e4e4;
  background: rgba(167, 139, 250, 0.08);
  border-left-color: #a78bfa;
  font-weight: 500;
}

.sidebar-q-item .q-prefix {
  font-weight: 600;
  color: #949494;
  flex-shrink: 0;
  min-width: 24px;
}

.sidebar-q-item.active .q-prefix {
  color: #a78bfa;
}

.sidebar-q-item.follow-up {
  padding-left: 18px;
  opacity: 0.85;
}

.sidebar-q-item.follow-up .q-prefix {
  color: #fbbf24;
  min-width: 14px;
}

.sidebar-q-item.active.follow-up {
  background: rgba(251, 191, 36, 0.06);
  border-left-color: #fbbf24;
  opacity: 1;
}

.sidebar-q-item .q-check {
  color: #4ade80;
  font-weight: bold;
  margin-left: auto;
  font-size: 0.75rem;
  padding-left: 6px;
  flex-shrink: 0;
}

/* Question Counter */
.question-counter {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid #333;
  border-radius: var(--radius-md);
  padding: var(--space-md);
  text-align: center;
}

.question-counter-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: #949494;
  margin-bottom: var(--space-sm);
}

.question-counter-value {
  font-size: 1.75rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.question-counter-bar {
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-full);
  margin-top: var(--space-sm);
  overflow: hidden;
}

.question-counter-bar-fill {
  height: 100%;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  transition: width var(--duration-slow) var(--ease-out);
}

/* Session Stats */
.session-stats {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  padding-top: var(--space-lg);
  border-top: 1px solid #333;
}

.stat-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
}

.stat-label {
  color: #949494;
}

.stat-value {
  color: #e4e4e4;
  font-weight: 600;
  font-family: var(--font-mono);
}

/* === Main Stage (Right Panel) === */
.main-stage {
  display: flex;
  flex-direction: column;
  padding: var(--space-2xl) var(--space-3xl);
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
}

/* Round Header */
.round-header {
  margin-bottom: var(--space-2xl);
  animation: slideDown 0.5s var(--ease-out);
}

.round-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: var(--space-md);
}

.round-badge[data-round="1"] {
  background: rgba(16, 185, 129, 0.1);
  color: var(--persona-qa-lead);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.round-badge[data-round="2"] {
  background: rgba(59, 130, 246, 0.1);
  color: var(--persona-architect);
  border: 1px solid rgba(59, 130, 246, 0.2);
}

.round-badge[data-round="3"] {
  background: rgba(245, 158, 11, 0.1);
  color: var(--persona-delivery);
  border: 1px solid rgba(245, 158, 11, 0.2);
}

.round-badge[data-round="4"] {
  background: rgba(217, 70, 239, 0.1);
  color: var(--persona-hr);
  border: 1px solid rgba(217, 70, 239, 0.2);
}

.round-title {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

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

/* === Question Bubble === */
.question-container {
  margin-bottom: var(--space-xl);
  animation: slideUp 0.5s var(--ease-out);
}

.question-bubble {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  border-top-left-radius: var(--radius-sm);
  padding: var(--space-xl);
  backdrop-filter: var(--glass-blur);
  position: relative;
}

.question-meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
}

.question-topic-tag {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--accent-violet);
  background: rgba(124, 58, 237, 0.1);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-weight: 600;
}

.question-difficulty {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-weight: 600;
}

.question-difficulty.easy {
  color: var(--accent-emerald);
  background: rgba(16, 185, 129, 0.1);
}

.question-difficulty.medium {
  color: var(--accent-amber);
  background: rgba(245, 158, 11, 0.1);
}

.question-difficulty.hard {
  color: var(--accent-red);
  background: rgba(239, 68, 68, 0.1);
}

.question-resume-tag {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-weight: 600;
  color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.2);
}

.question-text {
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--text-primary);
  font-weight: 400;
}

.question-text code {
  font-family: var(--font-mono);
  background: rgba(124, 58, 237, 0.1);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-size: 0.9em;
  color: var(--accent-violet);
}

/* === Typing Indicator === */
.typing-indicator {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: var(--space-md) var(--space-lg);
  animation: fadeIn 0.3s;
}

.typing-indicator span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
  animation: typing 1.4s ease-in-out infinite;
}

.typing-indicator span:nth-child(2) {
  animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
  animation-delay: 0.4s;
}

/* === Answer Area === */
.answer-container {
  margin-bottom: var(--space-xl);
  animation: slideUp 0.6s var(--ease-out);
}

.answer-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
}

.answer-textarea {
  width: 100%;
  min-height: 180px;
  max-height: 400px;
  background: var(--bg-tertiary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  line-height: 1.7;
  resize: vertical;
  transition: border-color var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out);
}

.answer-textarea:focus {
  outline: none;
  border-color: var(--accent-violet);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.15);
}

.answer-textarea::placeholder {
  color: var(--text-muted);
}

.answer-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--space-md);
}

.answer-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.answer-hint kbd {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--glass-border);
  border-radius: 4px;
  padding: 2px 6px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

/* === Feedback Card === */
.feedback-container {
  animation: slideUp 0.5s var(--ease-out);
  margin-bottom: var(--space-xl);
}

.feedback-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  backdrop-filter: var(--glass-blur);
  overflow: hidden;
}

.feedback-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg) var(--space-xl);
  border-bottom: 1px solid var(--glass-border);
}

.feedback-header-left {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.feedback-header-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--text-muted);
}

.score-badge {
  display: inline-flex;
  align-items: baseline;
  gap: 2px;
  padding: 8px 20px;
  border-radius: var(--radius-full);
  font-weight: 800;
  font-size: 1.3rem;
  font-family: var(--font-mono);
}

.score-badge .score-max {
  font-size: 0.8rem;
  font-weight: 500;
  opacity: 0.6;
}

.score-badge.exceptional {
  background: rgba(16, 185, 129, 0.15);
  color: var(--score-exceptional);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.score-badge.good {
  background: rgba(6, 182, 212, 0.15);
  color: var(--score-good);
  border: 1px solid rgba(6, 182, 212, 0.3);
}

.score-badge.average {
  background: rgba(245, 158, 11, 0.15);
  color: var(--score-average);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.score-badge.fail {
  background: rgba(239, 68, 68, 0.15);
  color: var(--score-fail);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.feedback-body {
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.feedback-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.feedback-section-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.feedback-section-title.good {
  color: var(--accent-emerald);
}

.feedback-section-title.missed {
  color: var(--accent-red);
}

.feedback-point {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-secondary);
  padding-left: var(--space-sm);
}

.feedback-point .point-icon {
  flex-shrink: 0;
  margin-top: 3px;
}

.feedback-point .point-icon.good {
  color: var(--accent-emerald);
}

.feedback-point .point-icon.missed {
  color: var(--accent-red);
}

/* Model Answer */
.model-answer {
  background: rgba(124, 58, 237, 0.05);
  border: 1px solid rgba(124, 58, 237, 0.15);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}

.model-answer-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--accent-violet);
  font-weight: 600;
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.model-answer-text {
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--text-secondary);
}

.model-answer-text code {
  font-family: var(--font-mono);
  background: rgba(124, 58, 237, 0.1);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-size: 0.85em;
  color: var(--accent-violet);
}

.model-answer-text pre {
  background: var(--bg-primary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: var(--space-md);
  margin: var(--space-md) 0;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.6;
}

/* Feedback Navigation */
.feedback-nav {
  display: flex;
  justify-content: flex-end;
  padding: var(--space-lg) var(--space-xl);
  border-top: 1px solid var(--glass-border);
  gap: var(--space-md);
}

/* ============================================
   ROUND INTRO SCREEN
   ============================================ */

.round-intro {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: var(--space-2xl);
  animation: fadeIn 0.8s var(--ease-out);
}

.round-intro-number {
  font-size: 6rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: var(--space-md);
  animation: scaleIn 0.6s var(--ease-spring);
}

.round-intro-title {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
  text-align: center;
}

.round-intro-persona {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
}

.round-intro-topics {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  justify-content: center;
  max-width: 500px;
  margin-bottom: var(--space-2xl);
}

.round-intro-topic {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* ============================================
   ROUND SUMMARY MODAL
   ============================================ */

.round-summary {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: var(--space-2xl);
  animation: fadeIn 0.6s var(--ease-out);
}

.summary-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  backdrop-filter: var(--glass-blur);
  padding: var(--space-2xl);
  max-width: 650px;
  width: 100%;
  animation: scaleIn 0.5s var(--ease-spring);
}

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

.summary-round-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
}

.summary-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}

.summary-overall-score {
  font-size: 3.5rem;
  font-weight: 800;
  font-family: var(--font-mono);
  text-align: center;
  margin-bottom: var(--space-xl);
}

.summary-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.summary-stat {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}

.summary-stat-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  margin-bottom: var(--space-xs);
}

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

.summary-feedback {
  background: rgba(124, 58, 237, 0.05);
  border: 1px solid rgba(124, 58, 237, 0.15);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.summary-feedback-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--accent-violet);
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.summary-feedback-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

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

/* ============================================
   FINAL SCORECARD
   ============================================ */

.final-scorecard {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: var(--space-2xl);
  animation: fadeIn 0.8s var(--ease-out);
}

.scorecard-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  backdrop-filter: var(--glass-blur);
  padding: var(--space-2xl) var(--space-3xl);
  max-width: 750px;
  width: 100%;
  animation: scaleIn 0.6s var(--ease-spring);
}

.scorecard-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.scorecard-title {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-sm);
}

.scorecard-subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
}

.scorecard-overall {
  text-align: center;
  margin-bottom: var(--space-2xl);
  padding: var(--space-xl);
  background: rgba(255, 255, 255, 0.02);
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-border);
}

.scorecard-overall-score {
  font-size: 5rem;
  font-weight: 800;
  font-family: var(--font-mono);
  line-height: 1;
  margin-bottom: var(--space-sm);
}

.scorecard-overall-label {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--text-muted);
}

.scorecard-verdict {
  font-size: 1.2rem;
  font-weight: 600;
  margin-top: var(--space-md);
  padding: 8px 24px;
  border-radius: var(--radius-full);
  display: inline-block;
}

.scorecard-verdict.pass {
  background: rgba(16, 185, 129, 0.1);
  color: var(--accent-emerald);
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.scorecard-verdict.borderline {
  background: rgba(245, 158, 11, 0.1);
  color: var(--accent-amber);
  border: 1px solid rgba(245, 158, 11, 0.25);
}

.scorecard-verdict.fail {
  background: rgba(239, 68, 68, 0.1);
  color: var(--accent-red);
  border: 1px solid rgba(239, 68, 68, 0.25);
}

.scorecard-rounds {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-bottom: var(--space-2xl);
}

.scorecard-round {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
}

.scorecard-round-info {
  display: flex;
  flex-direction: column;
}

.scorecard-round-name {
  font-weight: 600;
  font-size: 0.95rem;
}

.scorecard-round-persona {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.scorecard-round-score {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.1rem;
}

.scorecard-round-bar {
  flex: 1;
  margin: 0 var(--space-lg);
  height: 6px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.scorecard-round-bar-fill {
  height: 100%;
  border-radius: var(--radius-full);
  transition: width 1s var(--ease-out);
}

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

/* ============================================
   UTILITY CLASSES
   ============================================ */

.hidden {
  display: none !important;
}

.text-center {
  text-align: center;
}

.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-15px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

@keyframes avatarPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes dotPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.5); }
}

@keyframes typing {
  0%, 60%, 100% {
    opacity: 0.3;
    transform: translateY(0);
  }
  30% {
    opacity: 1;
    transform: translateY(-4px);
  }
}

@keyframes countUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes confetti {
  0% { transform: translateY(0) rotate(0deg); opacity: 1; }
  100% { transform: translateY(-200px) rotate(720deg); opacity: 0; }
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

/* === Confetti Particle === */
.confetti-particle {
  position: fixed;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  pointer-events: none;
  z-index: 1000;
  animation: confettiFall linear forwards;
}

@keyframes confettiFall {
  0% {
    transform: translateY(-10vh) rotate(0deg);
    opacity: 1;
  }
  100% {
    transform: translateY(110vh) rotate(720deg);
    opacity: 0;
  }
}

/* === Shake Animation (empty submit) === */
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  10%, 30%, 50%, 70%, 90% { transform: translateX(-4px); }
  20%, 40%, 60%, 80% { transform: translateX(4px); }
}

.shake {
  animation: shake 0.5s ease-in-out;
}

/* === Study Mode Action Bar === */
.study-action-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding: var(--space-lg) var(--space-xl);
  background: rgba(124, 58, 237, 0.03);
  border: 1px solid rgba(124, 58, 237, 0.1);
  border-radius: var(--radius-lg);
  backdrop-filter: var(--glass-blur);
}

.study-hint {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 1.5;
}

.study-hint-icon {
  font-size: 1.2rem;
  flex-shrink: 0;
}

/* === View Answer Button === */
.btn-view-answer {
  background: rgba(124, 58, 237, 0.08);
  border: 1px solid rgba(124, 58, 237, 0.25);
  color: var(--text-accent);
  padding: 12px 32px;
  border-radius: var(--radius-full);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
  white-space: nowrap;
  letter-spacing: 0.3px;
}

.btn-view-answer:hover {
  background: rgba(124, 58, 237, 0.15);
  border-color: rgba(124, 58, 237, 0.5);
  color: var(--text-primary);
  box-shadow: 0 0 20px rgba(124, 58, 237, 0.3);
  transform: translateY(-2px);
}

.btn-view-answer:active {
  transform: translateY(0);
}

/* === Answer Submitted State === */
.answer-textarea:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  min-height: 80px;
}

.answer-actions.submitted .answer-hint {
  display: none;
}

/* === Round Summary — Strongest/Weakest === */
.summary-highlights {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.summary-highlight {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.summary-highlight-icon {
  font-size: 1.3rem;
  flex-shrink: 0;
}

.summary-highlight-content {
  flex: 1;
}

.summary-highlight-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.summary-highlight-value {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-primary);
}

.summary-highlight-score {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1rem;
  flex-shrink: 0;
}



/* === Top Navigation Bar (Theme Toggle & Sidebar Toggle) === */
.top-nav-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--border-color);
  margin-bottom: var(--space-xl);
}

.btn-sidebar-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  position: relative;
  z-index: 100;
}

.btn-sidebar-toggle span {
  width: 100%;
  height: 3px;
  background: var(--text-primary);
  border-radius: 3px;
  transition: all var(--duration-fast);
}

.btn-theme-toggle {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  padding: 8px 18px;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.02);
  transition: all var(--duration-fast) var(--ease-out);
}

.btn-theme-toggle:hover {
  border-color: var(--text-accent);
  color: var(--text-accent);
  transform: translateY(-1px);
}

/* === Study Card === */
.study-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.study-question-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.study-divider {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: var(--space-sm) 0;
}

.study-answer-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

/* Expected Concepts */
.expected-concepts-box {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
}

.expected-concepts-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-accent);
  margin-bottom: var(--space-sm);
}

.expected-concept-item {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 6px;
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.expected-concept-item:last-child {
  margin-bottom: 0;
}

.expected-concept-item::before {
  content: '📌';
  font-size: 0.8rem;
}

/* Model Answer Section Override */
.model-answer {
  background: rgba(109, 40, 217, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}

[data-theme="dark"] .model-answer {
  background: rgba(167, 139, 250, 0.03);
}

.model-answer-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--text-accent);
  font-weight: 700;
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.model-answer-text {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--text-secondary);
}

.model-answer-text code {
  font-family: var(--font-mono);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-size: 0.85em;
  color: var(--text-accent);
}

.model-answer-text pre {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: var(--space-md);
  margin: var(--space-md) 0;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.6;
}

/* === Study Sequential Navigation === */
.study-navigation {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
  margin-top: var(--space-md);
}

.study-navigation .btn-primary,
.study-navigation .btn-secondary {
  flex: 1;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px var(--space-lg);
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 1024px) {
  .interview-layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    transform: translateX(-120%);
    width: 280px;
    height: 100vh;
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.5);
    z-index: 1000;
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-overlay {
    display: block;
  }

  .btn-sidebar-toggle {
    display: flex;
  }

  .main-stage {
    padding: var(--space-lg);
  }
}

@media (max-width: 768px) {
  .welcome-title {
    font-size: 2rem;
  }

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

  .summary-stats {
    grid-template-columns: 1fr;
  }

  .main-stage {
    padding: var(--space-md);
  }

  .question-bubble {
    padding: var(--space-lg);
  }

  .round-intro-number {
    font-size: 4rem;
  }

  .scorecard-overall-score {
    font-size: 3.5rem;
  }

  .study-action-bar {
    flex-direction: column;
    text-align: center;
    gap: var(--space-md);
    padding: var(--space-md);
  }

  .study-card {
    padding: var(--space-md);
    gap: var(--space-md);
  }

  .top-nav-bar {
    margin-bottom: var(--space-md);
  }
}

/* ============================================
   QUIZ STYLES
   ============================================ */
.quiz-section {
  margin-top: var(--space-2xl);
  padding: var(--space-xl);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow);
  animation: slideDown 0.4s var(--ease-out);
}

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

.quiz-header h3 {
  font-size: 1.1rem;
  color: var(--text-accent);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.quiz-progress-text {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
  background: var(--bg-tertiary);
  padding: 4px 10px;
  border-radius: var(--radius-full);
}

.quiz-question-text {
  font-size: 1.1rem;
  font-weight: 500;
  margin-bottom: var(--space-lg);
  color: var(--text-primary);
  line-height: 1.5;
}

.quiz-options-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.quiz-option-btn {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 14px 18px;
  border-radius: var(--radius-md);
  text-align: left;
  font-size: 1rem;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
}

.quiz-option-btn:hover:not(:disabled) {
  background: var(--bg-card-hover);
  border-color: var(--text-accent);
  transform: translateX(4px);
}

.quiz-option-btn.correct {
  background: rgba(16, 185, 129, 0.1);
  border-color: var(--accent-emerald);
  color: var(--accent-emerald);
}

.quiz-option-btn.incorrect {
  background: rgba(239, 68, 68, 0.1);
  border-color: var(--accent-red);
  color: var(--accent-red);
}

.quiz-option-btn:disabled {
  cursor: not-allowed;
  opacity: 0.8;
}

.quiz-feedback-text {
  margin-top: var(--space-md);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  animation: fadeIn 0.3s var(--ease-out);
}

.quiz-feedback-text.correct {
  background: rgba(16, 185, 129, 0.1);
  color: var(--accent-emerald);
  border-left: 3px solid var(--accent-emerald);
}

.quiz-feedback-text.incorrect {
  background: rgba(239, 68, 68, 0.1);
  color: var(--accent-red);
  border-left: 3px solid var(--accent-red);
}