/* ============================================================
   ENGLISH LEARNING GUIDE — DESIGN SYSTEM
   Premium dark-mode İngilizce öğrenme kılavuzu
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ======================== TOKENS ======================== */
:root {
  /* Core palette */
  --bg-primary: #06081a;
  --bg-secondary: #0d1130;
  --bg-card: #111540;
  --bg-card-hover: #161b52;
  --bg-surface: #1a1f5c;
  --bg-input: #0f1338;

  /* Text */
  --text-primary: #e8eaf6;
  --text-secondary: #9fa8da;
  --text-muted: #5c6bc0;

  /* Accents */
  --accent-gold: #f59e0b;
  --accent-gold-glow: rgba(245, 158, 11, 0.25);
  --accent-blue: #60a5fa;
  --accent-blue-glow: rgba(96, 165, 250, 0.2);
  --accent-green: #34d399;
  --accent-green-glow: rgba(52, 211, 153, 0.15);
  --accent-purple: #a78bfa;
  --accent-purple-glow: rgba(167, 139, 250, 0.15);
  --accent-rose: #fb7185;
  --accent-rose-glow: rgba(251, 113, 133, 0.15);
  --accent-cyan: #22d3ee;
  --accent-orange: #fb923c;

  /* Gradients */
  --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-gold: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  --gradient-blue: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
  --gradient-green: linear-gradient(135deg, #10b981 0%, #059669 100%);
  --gradient-purple: linear-gradient(135deg, #8b5cf6 0%, #6d28d9 100%);
  --gradient-rose: linear-gradient(135deg, #f43f5e 0%, #be123c 100%);
  --gradient-cyan: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
  --gradient-warm: linear-gradient(135deg, #f97316 0%, #dc2626 100%);

  /* Borders & Shadows */
  --border-subtle: rgba(99, 102, 241, 0.15);
  --border-active: rgba(99, 102, 241, 0.4);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
  --shadow-glow-gold: 0 0 30px rgba(245,158,11,0.15);
  --shadow-glow-blue: 0 0 30px rgba(96,165,250,0.15);
  --shadow-glow-purple: 0 0 30px rgba(167,139,250,0.15);

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

  /* Radii */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  --transition-spring: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
  position: relative;
  -webkit-font-smoothing: antialiased;
}

/* Animated background pattern */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(99,102,241,0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(168,85,247,0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 60% 80%, rgba(59,130,246,0.05) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

a { color: var(--accent-blue); text-decoration: none; }
a:hover { text-decoration: underline; }

img { max-width: 100%; }

::selection {
  background: rgba(99, 102, 241, 0.3);
  color: #fff;
}

/* ======================== TYPOGRAPHY ======================== */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  line-height: 1.2;
}

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

.text-en { color: var(--accent-blue); font-weight: 500; }
.text-tr { color: var(--accent-green); font-style: italic; }
.text-synonym { color: var(--accent-purple); }
.text-gold { color: var(--accent-gold); }
.text-rose { color: var(--accent-rose); }

.mono { font-family: 'JetBrains Mono', monospace; }

/* ======================== LAYOUT ======================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  position: relative;
  z-index: 1;
}

.page-view {
  display: none;
  animation: fadeSlideIn 0.5s ease forwards;
  min-height: calc(100vh - 80px);
  padding-top: var(--space-xl);
  padding-bottom: var(--space-3xl);
}

.page-view.active {
  display: block;
}

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

/* ======================== HEADER / NAV ======================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(6, 8, 26, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  padding: var(--space-md) 0;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.logo {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  align-items: center;
  gap: var(--space-sm);
  font-family: 'Outfit', sans-serif;
  font-weight: 800;
  font-size: 1.4rem;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  transition: var(--transition-base);
}
.logo-icon, .logo-text { white-space: nowrap; }

.logo:hover { transform: scale(1.03); }

.logo-icon {
  font-size: 1.6rem;
  filter: drop-shadow(0 0 8px rgba(245,158,11,0.4));
}

.logo-text {
  background: linear-gradient(135deg, var(--accent-gold), var(--accent-orange));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  list-style: none;
}

.nav-links a, .nav-links button {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition-fast);
  cursor: pointer;
  background: none;
  border: none;
  font-family: inherit;
  white-space: nowrap;
}

.nav-links a:hover, .nav-links button:hover,
.nav-links a.active, .nav-links button.active {
  color: var(--text-primary);
  background: var(--bg-card);
  text-decoration: none;
}

.nav-links a.active {
  color: var(--accent-gold);
}

/* Mobile hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 8px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition-base);
}

/* ======================== DASHBOARD / HERO ======================== */
.hero-section {
  text-align: center;
  padding: var(--space-3xl) 0 var(--space-2xl);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 6px 16px;
  background: rgba(99,102,241,0.1);
  border: 1px solid rgba(99,102,241,0.2);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  color: var(--accent-purple);
  margin-bottom: var(--space-lg);
  font-weight: 500;
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 900;
  margin-bottom: var(--space-md);
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.3rem);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto var(--space-xl);
  font-weight: 300;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: var(--space-2xl);
  flex-wrap: wrap;
}

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

.stat-number {
  font-family: 'Outfit', sans-serif;
  font-size: 2.2rem;
  font-weight: 800;
  background: var(--gradient-gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ======================== LEVEL ROADMAP ======================== */
.roadmap-section {
  padding: var(--space-xl) 0;
}

.roadmap-section h2 {
  font-size: 1.8rem;
  margin-bottom: var(--space-sm);
}

.roadmap-subtitle {
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
}

.roadmap-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-lg);
}

/* ======================== LEVEL CARD ======================== */
.level-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  cursor: pointer;
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}

.level-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--card-accent, var(--gradient-hero));
  opacity: 0;
  transition: var(--transition-base);
}

.level-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-active);
  box-shadow: var(--shadow-md);
  background: var(--bg-card-hover);
}

.level-card:hover::before { opacity: 1; }

.level-card-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.level-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  font-size: 1.4rem;
  background: rgba(99,102,241,0.1);
  border: 1px solid rgba(99,102,241,0.2);
  flex-shrink: 0;
}

.level-number {
  font-family: 'Outfit', sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.level-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.level-date {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.level-card-body p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.level-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: var(--space-md);
}

.tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 500;
  background: rgba(99,102,241,0.1);
  color: var(--accent-purple);
  border: 1px solid rgba(99,102,241,0.15);
}

.tag.tag-vocab { background: rgba(96,165,250,0.1); color: var(--accent-blue); border-color: rgba(96,165,250,0.15); }
.tag.tag-grammar { background: rgba(245,158,11,0.1); color: var(--accent-gold); border-color: rgba(245,158,11,0.15); }
.tag.tag-dialogue { background: rgba(52,211,153,0.1); color: var(--accent-green); border-color: rgba(52,211,153,0.15); }
.tag.tag-practice { background: rgba(251,113,133,0.1); color: var(--accent-rose); border-color: rgba(251,113,133,0.15); }

/* ======================== EXTRAS GRID ======================== */
.extras-section {
  padding: var(--space-2xl) 0;
}

.extras-section h2 {
  font-size: 1.8rem;
  margin-bottom: var(--space-sm);
}

.extras-subtitle {
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
}

.extras-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-lg);
}

.extra-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  cursor: pointer;
  transition: var(--transition-base);
  text-align: center;
}

.extra-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-active);
  box-shadow: var(--shadow-md);
  background: var(--bg-card-hover);
}

.extra-card .extra-icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-md);
  display: block;
}

.extra-card h3 {
  font-size: 1.05rem;
  margin-bottom: var(--space-xs);
}

.extra-card p {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

/* ======================== LESSON PAGE ======================== */
.lesson-header {
  padding: var(--space-2xl) 0 var(--space-xl);
  text-align: center;
  position: relative;
}

.lesson-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 200%;
  height: 300px;
  background: radial-gradient(ellipse at center, rgba(99,102,241,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition-fast);
  margin-bottom: var(--space-lg);
  font-family: inherit;
}

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

.lesson-icon-large {
  font-size: 3rem;
  margin-bottom: var(--space-md);
  display: block;
}

.lesson-level-badge {
  display: inline-block;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--gradient-gold);
  color: #000;
  margin-bottom: var(--space-md);
  letter-spacing: 0.05em;
}

.lesson-title {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 800;
  margin-bottom: var(--space-sm);
}

.lesson-date-badge {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Lesson sections */
.lesson-section {
  margin-top: var(--space-2xl);
}

.section-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.section-header .section-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  font-size: 1.2rem;
  background: rgba(99,102,241,0.1);
}

.section-header h2 {
  font-size: 1.4rem;
  font-weight: 700;
}

/* ======================== VOCABULARY CARDS ======================== */
.vocab-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-md);
}

.vocab-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  cursor: pointer;
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}

.vocab-card:hover {
  border-color: var(--accent-blue);
  box-shadow: var(--shadow-glow-blue);
  transform: translateY(-2px);
}

.vocab-card .vocab-en {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--accent-blue);
  margin-bottom: 6px;
}

.vocab-card .vocab-tr {
  font-size: 0.92rem;
  color: var(--accent-green);
  font-style: italic;
  margin-bottom: 8px;
}

.vocab-card .vocab-synonyms {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.vocab-card .vocab-synonyms .syn-tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  background: var(--accent-purple-glow);
  color: var(--accent-purple);
  border: 1px solid rgba(167,139,250,0.2);
}

/* ======================== SENTENCES ======================== */
.sentence-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.sentence-pair {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  border-left: 3px solid var(--accent-blue);
  transition: var(--transition-base);
}

.sentence-pair:hover {
  border-left-color: var(--accent-gold);
  background: var(--bg-card-hover);
}

.sentence-en {
  font-size: 1rem;
  font-weight: 500;
  color: var(--accent-blue);
  margin-bottom: 6px;
}

.sentence-tr {
  font-size: 0.9rem;
  color: var(--accent-green);
  font-style: italic;
}

/* ======================== DIALOGUES ======================== */
.dialogue-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  max-width: 700px;
  margin: 0 auto;
}

.dialogue-bubble {
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-lg);
  max-width: 85%;
  position: relative;
  animation: bubbleFadeIn 0.3s ease forwards;
}

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

.dialogue-bubble.speaker-a {
  align-self: flex-start;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-bottom-left-radius: 4px;
}

.dialogue-bubble.speaker-b {
  align-self: flex-end;
  background: linear-gradient(135deg, rgba(99,102,241,0.2), rgba(139,92,246,0.15));
  border: 1px solid rgba(99,102,241,0.3);
  border-bottom-right-radius: 4px;
}

.dialogue-speaker {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent-gold);
  margin-bottom: 4px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.dialogue-text {
  font-size: 0.95rem;
  line-height: 1.6;
}

.dialogue-tr {
  margin-top: 6px;
  padding-top: 6px;
  border-top: 1px dashed var(--border-subtle, rgba(255,255,255,0.15));
  font-size: 0.85rem;
  font-style: italic;
  line-height: 1.5;
  opacity: 0.85;
}

/* ======================== GRAMMAR BOXES ======================== */
.grammar-box {
  background: var(--bg-card);
  border: 1px solid var(--accent-gold);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
  position: relative;
  overflow: hidden;
}

.grammar-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-gold);
}

.grammar-box h3 {
  color: var(--accent-gold);
  font-size: 1.1rem;
  margin-bottom: var(--space-md);
}

.grammar-box .grammar-rule {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.9rem;
  color: var(--accent-cyan);
  background: rgba(34,211,238,0.05);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--accent-cyan);
  margin-bottom: var(--space-md);
}

.grammar-box .grammar-examples {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

/* ======================== PHRASES ======================== */
.phrase-item {
  display: flex;
  align-items: baseline;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--border-subtle);
}

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

.phrase-en { font-weight: 500; color: var(--accent-blue); flex: 1; }
.phrase-separator { color: var(--text-muted); font-size: 0.8rem; }
.phrase-tr { color: var(--accent-green); font-style: italic; flex: 1; }

/* ======================== QUIZ ENGINE ======================== */
.quiz-container {
  max-width: 800px;
  margin: 0 auto;
}

.quiz-progress {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.quiz-progress-bar {
  flex: 1;
  height: 8px;
  background: var(--bg-card);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.quiz-progress-fill {
  height: 100%;
  background: var(--gradient-gold);
  border-radius: var(--radius-full);
  transition: width 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.quiz-progress-text {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  white-space: nowrap;
}

.quiz-question-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  margin-bottom: var(--space-lg);
}

.quiz-question-number {
  font-family: 'Outfit', sans-serif;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-gold);
  margin-bottom: var(--space-sm);
  letter-spacing: 0.05em;
}

.quiz-question-text {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: var(--space-xl);
  line-height: 1.5;
}

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

.quiz-option {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  background: var(--bg-input);
  border: 2px solid var(--border-subtle);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-base);
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--text-primary);
  width: 100%;
  text-align: left;
}

.quiz-option:hover:not(.disabled) {
  border-color: var(--accent-blue);
  background: rgba(96,165,250,0.05);
}

.quiz-option .option-letter {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(99,102,241,0.1);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--text-muted);
  flex-shrink: 0;
  transition: var(--transition-base);
}

.quiz-option:hover:not(.disabled) .option-letter {
  background: var(--accent-blue);
  color: #fff;
}

.quiz-option.correct {
  border-color: var(--accent-green);
  background: var(--accent-green-glow);
}

.quiz-option.correct .option-letter {
  background: var(--accent-green);
  color: #fff;
}

.quiz-option.incorrect {
  border-color: var(--accent-rose);
  background: var(--accent-rose-glow);
}

.quiz-option.incorrect .option-letter {
  background: var(--accent-rose);
  color: #fff;
}

.quiz-option.disabled {
  cursor: default;
  opacity: 0.6;
}

.quiz-option.correct.disabled, .quiz-option.incorrect.disabled {
  opacity: 1;
}

.quiz-explanation {
  margin-top: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  background: rgba(245,158,11,0.05);
  border: 1px solid rgba(245,158,11,0.2);
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  color: var(--accent-gold);
  display: none;
}

.quiz-explanation.show { display: block; }

.quiz-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--space-xl);
}

/* ======================== QUIZ RESULT ======================== */
.quiz-result {
  text-align: center;
  padding: var(--space-3xl) 0;
}

.quiz-result .result-icon {
  font-size: 4rem;
  margin-bottom: var(--space-lg);
}

.quiz-result .result-score {
  font-family: 'Outfit', sans-serif;
  font-size: 3rem;
  font-weight: 900;
}

.quiz-result .result-label {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
}

.score-circle {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-xl);
  position: relative;
}

.score-circle::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 6px solid var(--border-subtle);
}

.score-circle::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 6px solid transparent;
  border-top-color: var(--accent-gold);
  animation: scoreReveal 1s ease forwards;
}

@keyframes scoreReveal {
  from { transform: rotate(0deg); }
  to { transform: rotate(var(--score-rotation, 180deg)); }
}

/* ======================== TENSE TABLE ======================== */
.tense-grid {
  overflow-x: auto;
}

/* Vocabulary section */
.vocab-search-bar {
  position: sticky;
  top: 72px;
  z-index: 20;
  background: var(--bg-base, #0b0f19);
  padding: 12px 0 16px;
  margin-bottom: 8px;
}
.vocab-search-input {
  width: 100%;
  padding: 14px 18px;
  font-size: 1rem;
  color: var(--text-primary, #e5e7eb);
  background: var(--bg-surface, #131826);
  border: 1px solid var(--border-subtle, #2a2f3e);
  border-radius: 14px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.vocab-search-input:focus {
  border-color: var(--accent-gold, #f59e0b);
  box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.15);
}
.vocab-count {
  margin-top: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.vocab-row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 16px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border-subtle, #2a2f3e);
}
.vocab-row:hover { background: rgba(99,102,241,0.05); }
.vocab-row-word {
  font-weight: 700;
  color: var(--accent-gold, #f59e0b);
  font-size: 1.02rem;
  word-break: break-word;
}
.vocab-def { margin-bottom: 4px; }
.vocab-pos {
  display: inline-block;
  font-size: 0.72rem;
  padding: 1px 7px;
  margin-right: 8px;
  border-radius: 6px;
  background: rgba(99,102,241,0.15);
  color: var(--accent-purple, #a78bfa);
  font-style: italic;
}
.vocab-mean { color: var(--text-primary, #e5e7eb); }

/* Vocab pagination */
.vocab-pagination {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin: 28px 0 12px;
}
.vocab-page-btn {
  min-width: 40px;
  padding: 8px 12px;
  font-size: 0.9rem;
  font-weight: 600;
  text-align: center;
  color: var(--text-primary, #e5e7eb);
  background: var(--bg-surface, #131826);
  border: 1px solid var(--border-subtle, #2a2f3e);
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, transform 0.1s;
}
.vocab-page-btn:hover:not(.active):not(.disabled) {
  border-color: var(--accent-gold, #f59e0b);
  transform: translateY(-1px);
}
.vocab-page-btn.active {
  background: linear-gradient(135deg, var(--accent-gold, #f59e0b), var(--accent-orange, #fb923c));
  color: #1a1207;
  border-color: transparent;
  cursor: default;
}
.vocab-page-btn.disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
.vocab-page-ellipsis {
  padding: 8px 4px;
  color: var(--text-muted);
}

@media (max-width: 640px) {
  .vocab-row { grid-template-columns: 1fr; gap: 4px; }
  .vocab-search-bar { top: 64px; }
  .vocab-page-btn { min-width: 34px; padding: 7px 9px; font-size: 0.82rem; }
}

/* Turkish translation helpers */
.tense-tr {
  display: inline-block;
  margin-top: 4px;
  font-size: 0.78rem;
  font-style: italic;
  color: var(--text-muted);
  opacity: 0.9;
}
.story-en { margin-bottom: 6px; }
.story-tr {
  color: var(--accent-gold);
  font-style: italic;
  font-size: 0.95rem;
  opacity: 0.9;
}
.debate-side-tr {
  margin-top: 8px;
  font-size: 0.85rem;
  font-style: italic;
  color: var(--text-muted);
}
.ielts-q-tr {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 6px;
}
.ielts-a-tr {
  margin-top: 8px;
  font-size: 0.9rem;
  color: var(--accent-gold);
  line-height: 1.6;
}

.tense-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 0.85rem;
}

.tense-table th {
  background: var(--bg-surface);
  padding: var(--space-md);
  text-align: left;
  color: var(--accent-gold);
  font-weight: 600;
  position: sticky;
  top: 0;
  border-bottom: 2px solid var(--accent-gold);
}

.tense-table td {
  padding: var(--space-md);
  border-bottom: 1px solid var(--border-subtle);
  vertical-align: top;
}

.tense-table tr:hover td {
  background: rgba(99,102,241,0.05);
}

.tense-name {
  font-weight: 600;
  color: var(--accent-purple);
  white-space: nowrap;
}

.tense-positive { color: var(--accent-green); }
.tense-negative { color: var(--accent-rose); }
.tense-question { color: var(--accent-blue); }
.tense-neg-question { color: var(--accent-orange); }

/* Tense verb selector tabs */
.verb-tabs {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
}

.verb-tab {
  padding: 8px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition-fast);
  font-family: inherit;
}

.verb-tab:hover, .verb-tab.active {
  background: var(--gradient-gold);
  color: #000;
  border-color: transparent;
  font-weight: 600;
}

/* ======================== CONDITIONAL CARDS ======================== */
.conditional-type {
  margin-bottom: var(--space-2xl);
}

.conditional-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.conditional-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  font-family: 'Outfit', sans-serif;
  font-size: 1.4rem;
  font-weight: 800;
  color: #fff;
}

.conditional-badge.type-0 { background: var(--gradient-blue); }
.conditional-badge.type-1 { background: var(--gradient-green); }
.conditional-badge.type-2 { background: var(--gradient-purple); }
.conditional-badge.type-3 { background: var(--gradient-rose); }

.conditional-structure {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.9rem;
  color: var(--accent-cyan);
  background: rgba(34,211,238,0.05);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--accent-cyan);
  margin-bottom: var(--space-lg);
  display: inline-block;
}

.conditional-examples {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.conditional-example {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}

.conditional-example .cond-en {
  color: var(--accent-blue);
  font-weight: 500;
  margin-bottom: 4px;
  font-size: 0.9rem;
}

.conditional-example .cond-tr {
  color: var(--accent-green);
  font-style: italic;
  font-size: 0.85rem;
}

/* ======================== STORY READER ======================== */
.story-container {
  max-width: 750px;
  margin: 0 auto;
}

.story-paragraph {
  font-size: 1.05rem;
  line-height: 2;
  margin-bottom: var(--space-lg);
  color: var(--text-primary);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  transition: var(--transition-base);
}

.story-paragraph:hover {
  background: rgba(99,102,241,0.03);
}

.story-word {
  cursor: help;
  border-bottom: 1px dashed var(--accent-purple);
  color: var(--accent-blue);
  position: relative;
}

.story-word:hover {
  color: var(--accent-gold);
}

/* ======================== DEBATE CARDS ======================== */
.debate-controls {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.debate-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  margin-bottom: var(--space-lg);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--space-lg);
  align-items: center;
  transition: var(--transition-base);
}

.debate-card:hover {
  border-color: var(--border-active);
  box-shadow: var(--shadow-sm);
}

.debate-side {
  padding: var(--space-md);
}

.debate-side-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
}

.debate-side.side-a .debate-side-label { color: var(--accent-green); }
.debate-side.side-b .debate-side-label { color: var(--accent-rose); }

.debate-side-text {
  font-size: 0.92rem;
  line-height: 1.5;
}

.debate-vs {
  font-family: 'Outfit', sans-serif;
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--accent-gold);
  text-align: center;
}

.debate-number {
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
  font-weight: 600;
}

/* ======================== Q&A ACCORDION ======================== */
.qa-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.qa-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition-base);
}

.qa-item:hover {
  border-color: var(--border-active);
}

.qa-question {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-lg);
  cursor: pointer;
  transition: var(--transition-fast);
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-primary);
  width: 100%;
  background: none;
  border: none;
  text-align: left;
}

.qa-question:hover { background: rgba(99,102,241,0.03); }

.qa-question .qa-num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: rgba(99,102,241,0.1);
  color: var(--accent-purple);
  font-size: 0.8rem;
  font-weight: 700;
  flex-shrink: 0;
}

.qa-question .qa-arrow {
  margin-left: auto;
  color: var(--text-muted);
  transition: var(--transition-base);
  flex-shrink: 0;
}

.qa-item.open .qa-arrow {
  transform: rotate(180deg);
}

.qa-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
}

.qa-item.open .qa-answer {
  max-height: 400px;
  padding: 0 var(--space-lg) var(--space-lg);
}

.qa-answer-text {
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--text-secondary);
  padding-left: 46px;
  border-left: 2px solid var(--accent-green);
  margin-left: 15px;
  padding: var(--space-md) var(--space-lg);
}

.qa-category {
  display: inline-block;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-size: 0.68rem;
  font-weight: 600;
  background: rgba(245,158,11,0.1);
  color: var(--accent-gold);
  margin-left: auto;
  margin-right: var(--space-md);
  flex-shrink: 0;
}

/* ======================== IELTS SECTION ======================== */
.ielts-part {
  margin-bottom: var(--space-2xl);
}

.ielts-part-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  padding: var(--space-md) var(--space-lg);
  background: rgba(99,102,241,0.05);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--accent-purple);
}

.ielts-part-num {
  font-family: 'Outfit', sans-serif;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent-purple);
}

.ielts-dialogue {
  margin-bottom: var(--space-lg);
}

.ielts-q {
  font-weight: 600;
  color: var(--accent-gold);
  margin-bottom: var(--space-sm);
  font-size: 0.95rem;
}

.ielts-a {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.8;
  padding-left: var(--space-lg);
  border-left: 2px solid var(--accent-green);
}

/* ======================== BUTTONS ======================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: 'Inter', sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-base);
}

.btn-primary {
  background: var(--gradient-gold);
  color: #000;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow-gold);
}

.btn-secondary {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-active);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.btn-outline:hover {
  border-color: var(--accent-gold);
  color: var(--accent-gold);
}

.btn-sm {
  padding: 6px 14px;
  font-size: 0.8rem;
}

.btn-lg {
  padding: 14px 32px;
  font-size: 1rem;
}

/* ======================== FOOTER ======================== */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  padding: var(--space-xl) 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.82rem;
  position: relative;
  z-index: 1;
}

.site-footer p {
  margin-bottom: var(--space-xs);
}

/* ======================== CONFETTI ======================== */
.confetti-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 999;
  overflow: hidden;
}

.confetti {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 2px;
  animation: confettiFall 3s ease-out forwards;
}

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

/* ======================== SCROLLBAR ======================== */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-surface);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* ======================== TOOLTIP ======================== */
.tooltip {
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  padding: 6px 12px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  color: var(--accent-green);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s ease;
  z-index: 10;
}

.story-word:hover .tooltip {
  opacity: 1;
}

/* ======================== LOADING ======================== */
.loading-spinner {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--space-3xl);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-subtle);
  border-top-color: var(--accent-gold);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ======================== RESPONSIVE ======================== */
@media (max-width: 768px) {
  .container { padding: 0 var(--space-md); }
  
  .nav-links {
    display: none;
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    flex-direction: column;
    padding: var(--space-md);
    border-bottom: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-lg);
    z-index: 99;
  }

  .nav-links.open { display: flex; }

  .hamburger { display: flex; }

  .hero-stats { gap: var(--space-lg); }
  .stat-number { font-size: 1.6rem; }

  .roadmap-grid { grid-template-columns: 1fr; }
  .extras-grid { grid-template-columns: 1fr; }
  .vocab-grid { grid-template-columns: 1fr; }

  .conditional-examples { grid-template-columns: 1fr; }

  .debate-card {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .debate-vs {
    padding: var(--space-sm) 0;
  }

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

@media (max-width: 480px) {
  html { font-size: 14px; }

  .hero-title { font-size: 1.8rem; }
  .hero-stats { flex-direction: column; gap: var(--space-md); }

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

  .quiz-option { padding: var(--space-sm) var(--space-md); font-size: 0.85rem; }
  .quiz-option .option-letter { width: 28px; height: 28px; font-size: 0.75rem; }
}