/* ==========================================================================
   İNGİLİZCE DERS NOTLARI REHBERİ - MODERN TABLET & WEB STİL SİSTEMİ
   ========================================================================== */

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

/* --- 1. TEMA DEĞİŞKENLERİ (CSS CUSTOM PROPERTIES) --- */
:root, [data-theme="sepia"] {
  --theme-name: 'sepia';
  --bg-body: #f4efe4;
  --bg-card: #fbf8f1;
  --bg-card-hover: #ffffff;
  --bg-card-subtle: #eae3d2;
  --bg-header: rgba(244, 239, 228, 0.92);
  --border-subtle: #ded4c0;
  --border-strong: #bfb299;
  
  --text-main: #2b2520;
  --text-muted: #5e5449;
  --text-dim: #8c7e6e;

  /* 3 Renkli Kalem Metodolojisi */
  --pen-red: #b91c1c;
  --pen-red-bg: #fdf2f2;
  --pen-red-border: #f87171;
  --pen-red-glow: rgba(185, 28, 28, 0.12);

  --pen-brown: #78350f;
  --pen-brown-bg: #fef9ed;
  --pen-brown-border: #d97706;
  --pen-brown-glow: rgba(120, 53, 15, 0.1);

  --pen-green: #15803d;
  --pen-green-bg: #f0fdf4;
  --pen-green-border: #4ade80;
  --pen-green-glow: rgba(21, 128, 61, 0.12);

  --accent-gold: #d97706;
  --accent-gold-bg: #fef3c7;
  --shadow-sm: 0 1px 3px rgba(43, 37, 32, 0.05);
  --shadow-md: 0 4px 12px rgba(43, 37, 32, 0.08);
  --shadow-lg: 0 12px 28px rgba(43, 37, 32, 0.12);
}

[data-theme="dark"] {
  --theme-name: 'dark';
  --bg-body: #121316;
  --bg-card: #1c1d22;
  --bg-card-hover: #24252c;
  --bg-card-subtle: #272831;
  --bg-header: rgba(18, 19, 22, 0.92);
  --border-subtle: #2c2e38;
  --border-strong: #404352;
  
  --text-main: #f1f2f5;
  --text-muted: #a4a7b5;
  --text-dim: #717482;

  /* 3 Renkli Kalem (Dark Mod Optimize) */
  --pen-red: #f87171;
  --pen-red-bg: #2d1618;
  --pen-red-border: #ef4444;
  --pen-red-glow: rgba(248, 113, 113, 0.2);

  --pen-brown: #fbbf24;
  --pen-brown-bg: #2b2210;
  --pen-brown-border: #f59e0b;
  --pen-brown-glow: rgba(251, 191, 36, 0.15);

  --pen-green: #4ade80;
  --pen-green-bg: #122818;
  --pen-green-border: #22c55e;
  --pen-green-glow: rgba(74, 222, 128, 0.18);

  --accent-gold: #f59e0b;
  --accent-gold-bg: #322510;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 12px 30px rgba(0, 0, 0, 0.7);
}

[data-theme="light"] {
  --theme-name: 'light';
  --bg-body: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-hover: #f8fafc;
  --bg-card-subtle: #f1f5f9;
  --bg-header: rgba(248, 250, 252, 0.94);
  --border-subtle: #e2e8f0;
  --border-strong: #cbd5e1;
  
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-dim: #64748b;

  --pen-red: #dc2626;
  --pen-red-bg: #fef2f2;
  --pen-red-border: #fca5a5;
  --pen-red-glow: rgba(220, 38, 38, 0.12);

  --pen-brown: #92400e;
  --pen-brown-bg: #fffbeb;
  --pen-brown-border: #fcd34d;
  --pen-brown-glow: rgba(146, 64, 14, 0.1);

  --pen-green: #16a34a;
  --pen-green-bg: #f0fdf4;
  --pen-green-border: #86efac;
  --pen-green-glow: rgba(22, 163, 74, 0.12);

  --accent-gold: #d97706;
  --accent-gold-bg: #fef3c7;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 12px 28px rgba(15, 23, 42, 0.1);
}

[data-theme="forest"] {
  --theme-name: 'forest';
  --bg-body: #16201b;
  --bg-card: #1f2d26;
  --bg-card-hover: #26382f;
  --bg-card-subtle: #283a31;
  --bg-header: rgba(22, 32, 27, 0.94);
  --border-subtle: #2d4238;
  --border-strong: #3f5d4f;
  
  --text-main: #ecfdf5;
  --text-muted: #a7d0ba;
  --text-dim: #739884;

  --pen-red: #fb7185;
  --pen-red-bg: #351a22;
  --pen-red-border: #f43f5e;
  --pen-red-glow: rgba(251, 113, 133, 0.2);

  --pen-brown: #fcd34d;
  --pen-brown-bg: #342d13;
  --pen-brown-border: #f59e0b;
  --pen-brown-glow: rgba(252, 211, 77, 0.15);

  --pen-green: #34d399;
  --pen-green-bg: #143525;
  --pen-green-border: #10b981;
  --pen-green-glow: rgba(52, 211, 153, 0.2);

  --accent-gold: #fbbf24;
  --accent-gold-bg: #3b3214;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 12px 30px rgba(0, 0, 0, 0.7);
}

/* --- 2. TEMEL YAZI BOYUTU ÖLÇEKLENDİRMESİ --- */
html {
  font-size: 17.5px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
}

html[data-font="small"] { font-size: 15px; }
html[data-font="normal"] { font-size: 17.5px; }
html[data-font="large"] { font-size: 20px; }
html[data-font="xlarge"] { font-size: 23px; }

@media (min-width: 768px) {
  html {
    font-size: 18.5px;
  }
  html[data-font="small"] { font-size: 16px; }
  html[data-font="normal"] { font-size: 18.5px; }
  html[data-font="large"] { font-size: 21.5px; }
  html[data-font="xlarge"] { font-size: 24.5px; }
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-body);
  color: var(--text-main);
  line-height: 1.6;
  letter-spacing: -0.012em;
  min-height: 100vh;
  transition: background-color 0.25s ease, color 0.25s ease;
  padding-bottom: 80px;
  overflow-x: hidden;
}

/* Headings font */
h1, h2, h3, .font-heading {
  font-family: 'Outfit', 'Inter', sans-serif;
  letter-spacing: -0.02em;
}

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

/* --- 3. TABLET & ERGONOMİ: DOKUNMATİK HEDEFLER & KAYDIRMA --- */
button, a, input, [role="button"] {
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: 999px;
}

/* Safe area for iPad/Tablet notch & status bar */
.safe-padding {
  padding-top: env(safe-area-inset-top);
  padding-left: env(safe-area-inset-left);
  padding-right: env(safe-area-inset-right);
}

/* --- 4. HEADER & TABLET NAVİGASYON --- */
.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg-header);
  border-bottom: 1px solid var(--border-subtle);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: border-color 0.25s ease;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand-section {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: inherit;
  flex-shrink: 0;
}

.brand-badge {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Outfit', sans-serif;
  font-weight: 800;
  font-size: 15px;
  background: linear-gradient(135deg, #f59e0b, #d97706);
  color: #1e293b;
  box-shadow: 0 2px 8px rgba(217, 119, 6, 0.35);
}

.brand-title-wrap {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1.2;
  color: var(--text-main);
}

.brand-sub {
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* Header Action Controls */
.header-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.theme-selector-group, .zoom-selector-group {
  display: flex;
  gap: 2px;
  background: var(--bg-card-subtle);
  padding: 2px;
  border-radius: 10px;
  border: 1px solid var(--border-subtle);
  flex-shrink: 0;
}

.btn-theme {
  height: 32px;
  min-width: 30px;
  padding: 0 4px;
  font-size: 0.82rem;
}

.btn-zoom {
  height: 32px;
  min-width: 28px;
  padding: 0 4px;
  font-weight: 700;
}

.btn-icon {
  height: 38px;
  min-width: 38px;
  padding: 0 8px;
  border-radius: 10px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-card-subtle);
  color: var(--text-main);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.btn-icon:hover {
  background: var(--bg-card);
  border-color: var(--border-strong);
  transform: translateY(-1px);
}

.btn-icon:active {
  transform: scale(0.96);
}

/* Quick Page Pill Navigator */
.sub-nav {
  position: sticky;
  top: 60px;
  z-index: 90;
  background-color: var(--bg-card-subtle);
  border-bottom: 1px solid var(--border-subtle);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  width: 100%;
}

.sub-nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 6px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

/* Zone 1: Kaydırılabilir Sayfa Butonları (S1 - S9) */
.sub-nav-links {
  display: flex;
  align-items: center;
  gap: 5px;
  overflow-x: auto;
  white-space: nowrap;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  flex: 1 1 auto;
  min-width: 0;
  padding-right: 6px;
}
.sub-nav-links::-webkit-scrollbar { display: none; }

/* Zone 2: Sabit Sağ Aksiyon Bölümü (Test Butonu & İlerleme Çubuğu) */
.sub-nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
  margin-left: auto;
}

.nav-pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 9px;
  border-radius: 8px;
  font-size: 0.78rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid transparent;
  transition: all 0.18s ease;
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-pill:hover, .nav-pill.active {
  color: var(--text-main);
  background: var(--bg-card);
  border-color: var(--border-subtle);
  box-shadow: var(--shadow-sm);
}

.pill-badge {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  font-size: 0.75rem;
  background: var(--bg-card);
  padding: 1px 4px;
  border-radius: 4px;
  border: 1px solid var(--border-subtle);
}

.nav-pill.highlight {
  color: var(--pen-red);
  background: var(--pen-red-bg);
  border-color: var(--pen-red-border);
}

.nav-test-pill {
  font-weight: 700;
  padding: 6px 12px;
  border-radius: 9px;
  letter-spacing: -0.01em;
  box-shadow: 0 1px 6px rgba(239, 68, 68, 0.18);
}
.nav-test-pill:hover {
  background: var(--pen-red-bg);
  border-color: var(--pen-red);
  transform: translateY(-1px);
}

/* Study Progress Banner in Nav */
.study-progress-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 8px;
  background: var(--accent-gold-bg);
  color: var(--pen-brown);
  font-size: 0.74rem;
  font-weight: 700;
  border: 1px solid var(--border-subtle);
  flex-shrink: 0;
}

.progress-mini-bar {
  width: 44px;
  height: 6px;
  background: rgba(0, 0, 0, 0.12);
  border-radius: 999px;
  overflow: hidden;
}

.progress-mini-fill {
  height: 100%;
  background: var(--accent-gold);
  border-radius: 999px;
  width: 0%;
  transition: width 0.3s ease;
}

/* --- 5. ANA İÇERİK DÜZENİ (MAIN LAYOUT) --- */
.main-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

/* Section Anchor Offset for Fixed Header */
section {
  scroll-margin-top: 110px;
}

/* Section Header Bar */
.section-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--border-subtle);
  margin-bottom: 18px;
}

.section-title-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.section-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--pen-red);
}

.badge-page {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 6px;
  background-color: var(--pen-red-bg);
  color: var(--pen-red);
  border: 1px solid var(--pen-red-border);
}

/* Checkbox "Okundu" Tracker on Each Page */
.page-tracker-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 8px;
  border: 1px solid var(--border-subtle);
  background-color: var(--bg-card);
  color: var(--text-muted);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
}

.page-tracker-btn:hover {
  background-color: var(--bg-card-subtle);
  border-color: var(--border-strong);
}

.page-tracker-btn.completed {
  background-color: var(--pen-green-bg);
  border-color: var(--pen-green-border);
  color: var(--pen-green);
}

.page-tracker-btn .check-icon {
  width: 16px;
  height: 16px;
  border-radius: 4px;
  border: 1.5px solid currentColor;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
}

/* --- 6. KARTLAR VE GÖRSEL METODOLOJİ (CARDS & 3-PEN METODU) --- */
.card-theme {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 20px;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.card-theme:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
}

.card-grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 16px;
}

.card-grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 14px;
}

.card-header-sub {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-subtle);
}

.card-title-sub {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--pen-brown);
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-badge-logic {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  padding: 3px 8px;
  border-radius: 6px;
  background-color: var(--bg-card-subtle);
  color: var(--pen-green);
  border: 1px solid var(--border-subtle);
}

/* Kutu Türleri: Bilgi / Mantık Kutusu */
.box-logic {
  background-color: var(--bg-card-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 12px 14px;
  font-size: 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.box-logic-title {
  font-weight: 700;
  color: var(--pen-green);
  display: flex;
  align-items: center;
  gap: 6px;
}

.box-logic-text {
  color: var(--text-muted);
  line-height: 1.55;
}

/* Kırmızı Formül Kutusu */
.box-formula {
  background-color: var(--pen-red-bg);
  border: 1px solid var(--pen-red-border);
  border-radius: 12px;
  padding: 12px 14px;
  font-size: 0.85rem;
  color: var(--pen-red);
  box-shadow: 0 2px 6px var(--pen-red-glow);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.box-formula-title {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  color: var(--pen-red);
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Kritik Sınav Tuzağı & Uyarı Kutusu */
.box-warning {
  background-color: var(--pen-red-bg);
  border: 1.5px solid var(--pen-red);
  border-radius: 12px;
  padding: 14px 16px;
  font-size: 0.85rem;
  color: var(--pen-red);
  position: relative;
}

.box-warning-title {
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 6px;
}

/* Örnek Cümle Listesi */
.example-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.example-item {
  background-color: var(--bg-card-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.example-sentence-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.example-en {
  font-weight: 700;
  color: var(--pen-brown);
  font-size: 1.02rem;
  line-height: 1.45;
}

.example-tr {
  color: var(--pen-green);
  font-size: 0.92rem;
  padding-left: 12px;
  border-left: 2.5px solid var(--pen-green-border);
  line-height: 1.45;
}

/* Sesli Telaffuz (TTS) Butonu */
.btn-speech {
  height: 28px;
  width: 28px;
  border-radius: 6px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: all 0.15s ease;
}

.btn-speech:hover {
  background: var(--accent-gold-bg);
  color: var(--pen-brown);
  border-color: var(--accent-gold);
  transform: scale(1.08);
}

.btn-speech:active {
  transform: scale(0.92);
}

/* Cümleyi Kopyala Butonu */
.btn-copy {
  height: 28px;
  width: 28px;
  border-radius: 6px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  color: var(--text-dim);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: all 0.15s ease;
}
.btn-copy:hover {
  color: var(--text-main);
  border-color: var(--border-strong);
}

/* --- 7. KALEM KILAVUZU BANNERI --- */
.pen-guide-banner {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 18px;
  padding: 20px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.pen-guide-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-subtle);
}

.pen-legend-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 12px;
}

.pen-legend-box {
  border-radius: 12px;
  padding: 14px;
  border: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.pen-legend-box.red {
  background-color: var(--pen-red-bg);
  border-color: var(--pen-red-border);
  color: var(--pen-red);
}

.pen-legend-box.brown {
  background-color: var(--pen-brown-bg);
  border-color: var(--pen-brown-border);
  color: var(--pen-brown);
}

.pen-legend-box.green {
  background-color: var(--pen-green-bg);
  border-color: var(--pen-green-border);
  color: var(--pen-green);
}

.pen-legend-title {
  font-size: 0.85rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 6px;
}

.pen-legend-content {
  font-size: 0.78rem;
  line-height: 1.6;
}

/* --- 8. İNTERAKTİF TEST BÖLÜMÜ (QUIZ SECTION) --- */
.quiz-section {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 24px;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.quiz-dashboard {
  background-color: var(--bg-card-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 14px 18px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.quiz-score-group {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.quiz-score-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 700;
}

.badge-correct { color: var(--pen-green); }
.badge-wrong { color: var(--pen-red); }
.badge-total { color: var(--text-dim); }

.quiz-filter-group {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.btn-filter {
  padding: 5px 10px;
  border-radius: 8px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-filter.active, .btn-filter:hover {
  background: var(--pen-brown-bg);
  border-color: var(--accent-gold);
  color: var(--pen-brown);
}

.quiz-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 16px;
}

.quiz-item {
  background-color: var(--bg-card-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: all 0.2s ease;
}

.quiz-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.74rem;
  color: var(--text-dim);
}

.quiz-question {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.5;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.quiz-opt-btn {
  width: 100%;
  text-align: left;
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  color: var(--text-main);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.18s ease;
  min-height: 44px;
  display: flex;
  align-items: center;
}

.quiz-opt-btn:hover:not(:disabled) {
  border-color: var(--accent-gold);
  background-color: var(--accent-gold-bg);
  color: var(--pen-brown);
  transform: translateX(2px);
}

.quiz-opt-btn.is-correct {
  border-color: var(--pen-green) !important;
  background-color: var(--pen-green-bg) !important;
  color: var(--pen-green) !important;
  font-weight: 700 !important;
}

.quiz-opt-btn.is-wrong {
  border-color: var(--pen-red) !important;
  background-color: var(--pen-red-bg) !important;
  color: var(--pen-red) !important;
  font-weight: 600 !important;
}

.quiz-feedback {
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 0.82rem;
  line-height: 1.5;
  display: none;
  animation: fadeIn 0.25s ease-in-out;
}

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

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- 9. HIZLI FORMÜL ÖZETİ (CHEAT SHEET) MODAL / DRAWER --- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.modal-backdrop.open {
  display: flex;
}

.modal-content {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  max-width: 760px;
  width: 100%;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.modal-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--pen-red);
  display: flex;
  align-items: center;
  gap: 8px;
}

.modal-body {
  padding: 20px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.btn-close-modal {
  height: 32px;
  width: 32px;
  border-radius: 8px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-card-subtle);
  color: var(--text-dim);
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* --- 10. ARAMA VE FİLTRELEME ÇEKMECESİ --- */
.search-container {
  display: flex;
  align-items: center;
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 6px 12px;
  gap: 8px;
  flex: 1 1 auto;
  min-width: 130px;
  max-width: 380px;
  transition: all 0.2s ease;
}

.search-container:focus-within {
  border-color: var(--accent-gold);
  box-shadow: 0 0 0 3px var(--accent-gold-bg);
}

.search-input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-main);
  font-size: 0.88rem;
  width: 100%;
  font-family: inherit;
}

.search-input::placeholder {
  color: var(--text-dim);
}

.search-clear-btn {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 14px;
  display: none;
}

/* Arama Eşleşmesi Vurgusu */
.highlight-match {
  background-color: #fef08a;
  color: #854d0e;
  padding: 0 2px;
  border-radius: 3px;
}
[data-theme="dark"] .highlight-match {
  background-color: #854d0e;
  color: #fef08a;
}

/* --- 11. TABLET SIDEBAR & OFFCANVAS NAVİGASYON --- */
.sidebar-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  z-index: 150;
  display: none;
}

.sidebar-overlay.open {
  display: block;
}

.toc-drawer {
  position: fixed;
  top: 0;
  left: -320px;
  width: 300px;
  height: 100%;
  background-color: var(--bg-card);
  border-right: 1px solid var(--border-subtle);
  z-index: 160;
  display: flex;
  flex-direction: column;
  transition: left 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: var(--shadow-lg);
}

.toc-drawer.open {
  left: 0;
}

.drawer-header {
  padding: 16px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.drawer-body {
  padding: 14px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.drawer-nav-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  border-radius: 10px;
  color: var(--text-main);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  transition: all 0.15s ease;
}

.drawer-nav-item:hover {
  background-color: var(--bg-card-subtle);
  color: var(--pen-brown);
}

.drawer-nav-item.active {
  background-color: var(--accent-gold-bg);
  color: var(--pen-brown);
  border: 1px solid var(--border-subtle);
}

/* --- 12. FOOTER --- */
.app-footer {
  border-top: 1px solid var(--border-subtle);
  padding: 32px 16px;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.82rem;
  background-color: var(--bg-card-subtle);
  margin-top: 48px;
}

.footer-inner {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* --- 13. MEDYA SORGULARI (TABLET & MOBİL) --- */
.hidden-mobile { display: inline-flex; }
.hidden-tablet { display: inline-flex; }

/* 1200px altı: Hap isimlerini gizle (S1, S2 rozetleri görünür), sağdaki Test asla taşmaz */
@media (max-width: 1200px) {
  .nav-pill-title {
    display: none;
  }
}

/* Tablet (1024px altı) */
@media (max-width: 1024px) {
  .hidden-tablet {
    display: none !important;
  }
  .search-container {
    max-width: 260px;
  }
  .sub-nav-inner {
    padding: 6px 12px;
  }
}

/* Mobil / Dikey Tablet (768px altı) */
@media (max-width: 768px) {
  .hidden-mobile {
    display: none !important;
  }
  .header-container {
    height: 54px;
    padding: 0 10px;
    gap: 8px;
  }
  .brand-sub { display: none; }
  .brand-title { font-size: 0.88rem; }
  .search-container {
    min-width: 100px;
    padding: 5px 8px;
  }
  .search-input {
    font-size: 0.8rem;
  }
  .sub-nav-inner {
    padding: 5px 8px;
    gap: 6px;
  }
  .test-count-badge {
    display: none;
  }
  .progress-label-text {
    display: none;
  }
  .progress-mini-bar {
    width: 32px;
  }
  .card-theme { padding: 16px; border-radius: 14px; }
  .main-wrapper { padding: 16px 10px; gap: 20px; }
  .quiz-section { padding: 16px; border-radius: 16px; }
  .quiz-dashboard { padding: 10px 12px; gap: 10px; }
}

@media (min-width: 1024px) {
  /* Tablet Landscape / Large screen: spacious padding and typography */
  .main-wrapper {
    padding: 32px 24px;
  }
}

/* ==========================================================================
   --- 14. AKTİF ÖĞRENME ARAÇLARI (ACTIVE RECALL, NOT ALMA, ÖGE ANALİZİ) ---
   ========================================================================== */

/* 1) Aktif Hatırlama & Maske Modu (Blur / Tap-to-Reveal) */
.recall-mode-active .maskable-sentence {
  filter: blur(6px);
  user-select: none;
  cursor: pointer;
  background-color: var(--border-subtle);
  border-radius: 6px;
  padding: 0 4px;
  transition: all 0.2s ease;
  position: relative;
}
.recall-mode-active .maskable-sentence::after {
  content: "👁️ Görmek için dokun";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 0.72rem;
  color: var(--text-main);
  background: var(--bg-card);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--border-subtle);
  filter: none;
  white-space: nowrap;
}
.recall-mode-active .maskable-sentence.revealed {
  filter: none;
  background-color: transparent;
  user-select: auto;
}
.recall-mode-active .maskable-sentence.revealed::after {
  display: none;
}

/* 2) Cümle Öge Analizi (Sentence Token Chips) */
.sentence-breakdown {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 6px;
  padding-top: 6px;
  border-top: 1px dashed var(--border-subtle);
}
.token-chip {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 5px;
  border: 1px solid var(--border-subtle);
  display: inline-flex;
  align-items: center;
  gap: 3px;
}
.chip-s { background: #dbeafe; color: #1e40af; border-color: #bfdbfe; }
.chip-v { background: #fee2e2; color: #991b1b; border-color: #fecaca; }
.chip-o { background: #fef3c7; color: #92400e; border-color: #fde68a; }
.chip-adj { background: #f3e8ff; color: #6b21a8; border-color: #e9d5ff; }
.chip-prep { background: #dcfce7; color: #166534; border-color: #bbf7d0; }

[data-theme="dark"] .chip-s { background: #1e3a8a; color: #bfdbfe; border-color: #2563eb; }
[data-theme="dark"] .chip-v { background: #7f1d1d; color: #fecaca; border-color: #dc2626; }
[data-theme="dark"] .chip-o { background: #78350f; color: #fde68a; border-color: #d97706; }
[data-theme="dark"] .chip-adj { background: #581c87; color: #e9d5ff; border-color: #9333ea; }
[data-theme="dark"] .chip-prep { background: #14532d; color: #bbf7d0; border-color: #16a34a; }

/* 3) Sık Yapılan Hatalar vs Doğrusu (Common Mistakes Comparison) */
.comparison-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 10px;
  margin-top: 8px;
}
.card-mistake {
  background-color: var(--pen-red-bg);
  border: 1px solid var(--pen-red-border);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 0.8rem;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.card-mistake-header {
  font-weight: 800;
  color: var(--pen-red);
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.78rem;
}
.card-correct {
  background-color: var(--pen-green-bg);
  border: 1px solid var(--pen-green-border);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 0.8rem;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.card-correct-header {
  font-weight: 800;
  color: var(--pen-green);
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.78rem;
}

/* 4) Derin Dilbilim Mantığı (Deep Logic Accordion) */
details.deep-logic-accordion {
  background-color: var(--bg-card-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.2s ease;
  margin-top: 6px;
}
details.deep-logic-accordion[open] {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-sm);
}
summary.accordion-summary {
  padding: 10px 14px;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}
summary.accordion-summary:hover {
  color: var(--text-main);
  background-color: var(--bg-card);
}
.accordion-content {
  padding: 12px 14px;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.82rem;
  color: var(--text-main);
  line-height: 1.6;
}

/* 5) Kullanıcı Özel Not Defteri (Personal Note Box) */
.user-note-container {
  margin-top: 8px;
  border: 1px dashed var(--border-strong);
  border-radius: 12px;
  padding: 10px 12px;
  background-color: var(--bg-card);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.user-note-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent-gold);
}
.user-note-textarea {
  width: 100%;
  min-height: 52px;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--border-subtle);
  background-color: var(--bg-card-subtle);
  color: var(--text-main);
  font-size: 0.82rem;
  font-family: inherit;
  resize: vertical;
  outline: none;
}
.user-note-textarea:focus {
  border-color: var(--accent-gold);
  background-color: var(--bg-card);
}
.btn-save-note {
  align-self: flex-end;
  padding: 4px 10px;
  border-radius: 6px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-card-subtle);
  color: var(--text-main);
  font-size: 0.74rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}
.btn-save-note:hover {
  background: var(--accent-gold-bg);
  border-color: var(--accent-gold);
  color: var(--pen-brown);
}

/* 6) Konu İçi Mikro-Pratik (Mini Challenge) */
.mini-check-box {
  background-color: var(--bg-card-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 12px;
  margin-top: 8px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.mini-check-title {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--pen-brown);
  display: flex;
  align-items: center;
  gap: 6px;
}
.mini-check-q {
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text-main);
}
.mini-check-options {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.btn-mini-opt {
  padding: 6px 12px;
  border-radius: 8px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  color: var(--text-main);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
}
.btn-mini-opt:hover:not(:disabled) {
  border-color: var(--accent-gold);
  background: var(--accent-gold-bg);
}
.btn-mini-opt.correct {
  background: var(--pen-green-bg) !important;
  color: var(--pen-green) !important;
  border-color: var(--pen-green) !important;
  font-weight: 700 !important;
}
.btn-mini-opt.wrong {
  background: var(--pen-red-bg) !important;
  color: var(--pen-red) !important;
  border-color: var(--pen-red) !important;
  font-weight: 700 !important;
}
.mini-check-feedback {
  font-size: 0.78rem;
  padding: 6px 10px;
  border-radius: 6px;
  display: none;
}

/* --- 15. TAM EKRAN VE GÖVDE ÖLÇEKLENDİRME UYUMLULUĞU --- */
:fullscreen, :-webkit-full-screen {
  background-color: var(--bg-body);
}

:fullscreen body, :-webkit-full-screen body {
  min-height: 100vh;
  width: 100%;
  background-color: var(--bg-body);
}