/* ============================================
   JIVEN LIBRARY - Warm Library Theme
   ============================================ */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;600;700;800&family=Inter:wght@300;400;500;600;700&family=Material+Symbols+Rounded:opsz,wght,FILL,GRAD@24,400,1,0&display=swap');

:root {
  --wood-dark: #1a0f0a;
  --wood-mid: #2C1810;
  --wood-light: #5D3A1A;
  --wood-accent: #8B4513;
  --parchment: #FFF8DC;
  --parchment-dark: #F5E6C8;
  --gold: #DAA520;
  --gold-bright: #FFD700;
  --gold-dim: #B8860B;
  --text-dark: #3E2723;
  --text-light: #F5E6C8;
  --text-muted: #a89080;
  --success: #4CAF50;
  --success-dark: #2E7D32;
  --error: #E53935;
  --error-dark: #C62828;
  --info: #42A5F5;
  --xp-gradient: linear-gradient(90deg, #FF8F00, #FFD700);
  --shadow-soft: 0 2px 12px rgba(0,0,0,0.3);
  --shadow-medium: 0 4px 20px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 20px rgba(218,165,32,0.3);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: 'Inter', sans-serif;
  background: linear-gradient(135deg, var(--wood-dark) 0%, var(--wood-mid) 50%, #1e120b 100%);
  color: var(--text-light);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--wood-dark); }
::-webkit-scrollbar-thumb { background: var(--wood-accent); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--gold-dim); }

/* ===== TOP BAR ===== */
.top-bar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(26, 15, 10, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 2px solid var(--wood-accent);
  padding: 8px 20px;
  display: flex; align-items: center; justify-content: space-between;
  height: 56px;
}

.top-bar-left { display: flex; align-items: center; gap: 12px; }

.logo {
  font-family: 'Playfair Display', serif;
  font-size: 20px; font-weight: 700;
  background: linear-gradient(135deg, var(--gold-bright), var(--gold));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}

.rank-badge {
  display: flex; align-items: center; gap: 6px;
  background: rgba(218,165,32,0.15);
  border: 1px solid rgba(218,165,32,0.3);
  padding: 4px 12px; border-radius: 20px;
  font-size: 12px; font-weight: 600;
  color: var(--gold-bright);
}
.rank-badge .rank-icon { font-size: 18px; }

.top-bar-center {
  flex: 1; max-width: 300px; margin: 0 20px;
}
.xp-bar-container {
  display: flex; align-items: center; gap: 8px;
}
.xp-bar-label { font-size: 11px; color: var(--text-muted); white-space: nowrap; }
.xp-bar-track {
  flex: 1; height: 10px; background: rgba(255,255,255,0.08);
  border-radius: 10px; overflow: hidden; position: relative;
}
.xp-bar-fill {
  height: 100%; background: var(--xp-gradient);
  border-radius: 10px; transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}
.xp-bar-fill::after {
  content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  animation: shimmer 2s infinite;
}
@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}
.xp-bar-text { font-size: 11px; color: var(--gold); font-weight: 600; white-space: nowrap; }

.top-bar-right { display: flex; align-items: center; gap: 16px; }

.streak-display {
  display: flex; align-items: center; gap: 4px;
  font-size: 14px; font-weight: 700;
  color: #FF6D00;
  animation: fireFlicker 1.5s ease-in-out infinite alternate;
}
@keyframes fireFlicker {
  0% { transform: scale(1); filter: brightness(1); }
  50% { transform: scale(1.05); filter: brightness(1.2); }
  100% { transform: scale(1); filter: brightness(0.95); }
}
.streak-count { font-size: 16px; }

.nav-btn {
  background: none; border: none; color: var(--text-muted);
  cursor: pointer; font-size: 22px; padding: 4px;
  transition: var(--transition); border-radius: 8px;
}
.nav-btn:hover { color: var(--gold); background: rgba(218,165,32,0.1); }

/* ===== MAIN CONTENT ===== */
.main-content {
  margin-top: 56px; padding: 24px;
  max-width: 1100px; margin-left: auto; margin-right: auto;
  min-height: calc(100vh - 56px);
}

.page { display: none; animation: fadeSlideIn 0.4s ease; }
.page.active { display: block; }

@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== BOOKSHELF PAGE ===== */
.bookshelf-header {
  text-align: center; margin-bottom: 32px;
  padding-top: 16px;
}
.bookshelf-header h1 {
  font-family: 'Playfair Display', serif;
  font-size: 36px; font-weight: 800;
  background: linear-gradient(135deg, var(--gold-bright), var(--parchment), var(--gold));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; margin-bottom: 8px;
}
.bookshelf-header p { color: var(--text-muted); font-size: 14px; }

.daily-challenge-banner {
  background: linear-gradient(135deg, rgba(218,165,32,0.2), rgba(255,215,0,0.1));
  border: 2px solid var(--gold);
  border-radius: var(--radius-lg);
  padding: 16px 24px; margin: 20px 0 32px;
  display: flex; align-items: center; justify-content: space-between;
  cursor: pointer; transition: var(--transition);
  animation: glowPulse 3s ease-in-out infinite;
}
.daily-challenge-banner:hover { transform: translateY(-2px); box-shadow: var(--shadow-glow); }
@keyframes glowPulse {
  0%, 100% { box-shadow: 0 0 10px rgba(218,165,32,0.2); }
  50% { box-shadow: 0 0 25px rgba(218,165,32,0.4); }
}
.daily-challenge-left { display: flex; align-items: center; gap: 16px; }
.daily-challenge-icon { font-size: 36px; }
.daily-challenge-info h3 { color: var(--gold-bright); font-size: 16px; }
.daily-challenge-info p { color: var(--text-muted); font-size: 13px; margin-top: 2px; }
.daily-challenge-arrow { font-size: 24px; color: var(--gold); }
.daily-challenge-done { opacity: 0.5; pointer-events: none; }
.daily-challenge-done .daily-challenge-icon::after { content: ' ✓'; color: var(--success); }

.bookshelf {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 24px; padding: 20px 0;
}

.book-card {
  background: linear-gradient(145deg, var(--wood-light), var(--wood-mid));
  border-radius: var(--radius);
  padding: 24px 16px; text-align: center;
  cursor: pointer; transition: var(--transition);
  border: 2px solid transparent;
  position: relative; overflow: hidden;
  transform-style: preserve-3d;
  perspective: 800px;
}
.book-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: var(--book-color, var(--gold));
  border-radius: var(--radius) var(--radius) 0 0;
}
.book-card:hover {
  transform: translateY(-8px);
  border-color: var(--book-color, var(--gold));
  box-shadow: 0 12px 30px rgba(0,0,0,0.5), 0 0 15px color-mix(in srgb, var(--book-color, var(--gold)) 30%, transparent);
}
.book-card:active { transform: translateY(-4px) scale(0.98); }

.book-icon { font-size: 48px; margin-bottom: 12px; display: block; }
.book-title {
  font-family: 'Playfair Display', serif;
  font-size: 16px; font-weight: 700; margin-bottom: 8px;
  color: var(--parchment);
}
.book-progress {
  font-size: 12px; color: var(--text-muted); margin-bottom: 10px;
}
.book-progress-bar {
  height: 4px; background: rgba(255,255,255,0.1);
  border-radius: 4px; overflow: hidden;
}
.book-progress-fill {
  height: 100%; border-radius: 4px;
  background: var(--book-color, var(--gold));
  transition: width 0.6s ease;
}

/* ===== SUBJECT PAGE ===== */
.subject-header {
  display: flex; align-items: center; gap: 16px;
  margin-bottom: 24px; padding-top: 8px;
}
.back-btn {
  background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.12);
  color: var(--text-light); padding: 8px 16px; border-radius: var(--radius-sm);
  cursor: pointer; font-size: 14px; transition: var(--transition);
  display: flex; align-items: center; gap: 6px;
}
.back-btn:hover { background: rgba(218,165,32,0.15); border-color: var(--gold-dim); color: var(--gold); }

.subject-title {
  font-family: 'Playfair Display', serif;
  font-size: 28px; font-weight: 700;
}
.mistakes-badge {
  background: rgba(229,57,53,0.2); border: 1px solid rgba(229,57,53,0.4);
  color: #FF8A80; padding: 4px 12px; border-radius: 20px;
  font-size: 12px; font-weight: 600; cursor: pointer;
  transition: var(--transition);
}
.mistakes-badge:hover { background: rgba(229,57,53,0.3); }

.chapters-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}
.chapter-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius); padding: 20px;
  cursor: pointer; transition: var(--transition);
  animation: staggerIn 0.5s ease backwards;
}
.chapter-card:nth-child(1) { animation-delay: 0.05s; }
.chapter-card:nth-child(2) { animation-delay: 0.1s; }
.chapter-card:nth-child(3) { animation-delay: 0.15s; }
.chapter-card:nth-child(4) { animation-delay: 0.2s; }
.chapter-card:nth-child(5) { animation-delay: 0.25s; }
.chapter-card:nth-child(6) { animation-delay: 0.3s; }
.chapter-card:nth-child(7) { animation-delay: 0.35s; }
.chapter-card:nth-child(8) { animation-delay: 0.4s; }

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

.chapter-card:hover {
  background: rgba(255,255,255,0.08);
  border-color: var(--gold-dim);
  transform: translateY(-3px);
  box-shadow: var(--shadow-medium);
}
.chapter-name {
  font-size: 15px; font-weight: 600; margin-bottom: 12px;
  color: var(--parchment);
}
.chapter-stats {
  display: flex; gap: 16px; font-size: 12px; color: var(--text-muted);
}
.chapter-stats span { display: flex; align-items: center; gap: 4px; }
.chapter-mode-btns {
  display: flex; gap: 8px; margin-top: 12px;
}
.mode-btn {
  flex: 1; padding: 8px; border-radius: var(--radius-sm);
  border: 1px solid rgba(255,255,255,0.1);
  background: rgba(255,255,255,0.05);
  color: var(--text-light); cursor: pointer;
  font-size: 12px; font-weight: 500;
  transition: var(--transition); text-align: center;
}
.mode-btn:hover { background: rgba(218,165,32,0.15); border-color: var(--gold); color: var(--gold); }
.mode-btn.mcq-btn:hover { border-color: #42A5F5; color: #42A5F5; background: rgba(66,165,245,0.1); }
.mode-btn.written-btn:hover { border-color: #AB47BC; color: #AB47BC; background: rgba(171,71,188,0.1); }

/* ===== QUIZ PAGE ===== */
.quiz-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 24px;
}
.quiz-progress-info {
  font-size: 14px; color: var(--text-muted);
}
.quiz-progress-info strong { color: var(--gold); }
.quiz-timer {
  font-size: 14px; color: var(--text-muted);
  background: rgba(255,255,255,0.05); padding: 6px 14px;
  border-radius: 20px; border: 1px solid rgba(255,255,255,0.08);
}
.quiz-progress-bar {
  height: 6px; background: rgba(255,255,255,0.08);
  border-radius: 6px; margin-bottom: 32px; overflow: hidden;
}
.quiz-progress-fill {
  height: 100%; border-radius: 6px;
  background: var(--xp-gradient);
  transition: width 0.4s ease;
}

.question-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-lg); padding: 32px;
  max-width: 700px; margin: 0 auto;
  animation: fadeSlideIn 0.4s ease;
}
.question-text {
  font-size: 18px; font-weight: 500; line-height: 1.6;
  margin-bottom: 28px; color: var(--parchment);
}
.options-list { display: flex; flex-direction: column; gap: 12px; }

.option-btn {
  display: flex; align-items: center; gap: 14px;
  background: rgba(255,255,255,0.04);
  border: 2px solid rgba(255,255,255,0.1);
  border-radius: var(--radius); padding: 16px 20px;
  cursor: pointer; transition: var(--transition);
  text-align: left; color: var(--text-light);
  font-size: 15px; line-height: 1.4;
}
.option-btn:hover:not(.disabled) {
  background: rgba(218,165,32,0.08);
  border-color: var(--gold-dim);
  transform: translateX(4px);
}
.option-btn:active:not(.disabled) { transform: translateX(2px) scale(0.99); }

.option-letter {
  width: 32px; height: 32px; border-radius: 50%;
  background: rgba(255,255,255,0.08);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 14px; flex-shrink: 0;
  transition: var(--transition);
}
.option-btn:hover:not(.disabled) .option-letter { background: rgba(218,165,32,0.2); color: var(--gold); }

.option-btn.correct {
  background: rgba(76,175,80,0.15); border-color: var(--success);
  animation: correctPulse 0.5s ease;
}
.option-btn.correct .option-letter { background: var(--success); color: white; }

.option-btn.wrong {
  background: rgba(229,57,53,0.15); border-color: var(--error);
  animation: wrongShake 0.5s ease;
}
.option-btn.wrong .option-letter { background: var(--error); color: white; }

.option-btn.disabled { pointer-events: none; opacity: 0.6; }
.option-btn.disabled.correct, .option-btn.disabled.wrong { opacity: 1; }

@keyframes correctPulse {
  0% { transform: scale(1); }
  30% { transform: scale(1.02); }
  100% { transform: scale(1); }
}
@keyframes wrongShake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-8px); }
  40% { transform: translateX(8px); }
  60% { transform: translateX(-5px); }
  80% { transform: translateX(5px); }
}

.explanation-box {
  margin-top: 20px; padding: 16px 20px;
  background: rgba(66,165,245,0.1);
  border: 1px solid rgba(66,165,245,0.3);
  border-radius: var(--radius); font-size: 14px;
  line-height: 1.6; color: #90CAF9;
  animation: fadeSlideIn 0.3s ease;
}

.xp-popup {
  position: fixed; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  font-size: 28px; font-weight: 800;
  color: var(--gold-bright);
  text-shadow: 0 0 20px rgba(255,215,0,0.5);
  pointer-events: none; z-index: 200;
  animation: xpFloat 1.2s ease forwards;
}
@keyframes xpFloat {
  0% { opacity: 1; transform: translate(-50%, -50%) scale(0.5); }
  30% { opacity: 1; transform: translate(-50%, -70%) scale(1.2); }
  100% { opacity: 0; transform: translate(-50%, -150%) scale(0.8); }
}

/* ===== WRITTEN ANSWER PAGE ===== */
.written-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-lg); padding: 32px;
  max-width: 700px; margin: 0 auto;
}
.written-question {
  font-size: 18px; font-weight: 500; line-height: 1.6;
  margin-bottom: 8px; color: var(--parchment);
}
.written-hints {
  margin-bottom: 16px; font-size: 13px; color: var(--text-muted);
}
.written-hints span {
  display: inline-block; background: rgba(255,255,255,0.06);
  padding: 2px 10px; border-radius: 12px; margin: 2px 4px 2px 0;
}
.answer-textarea {
  width: 100%; min-height: 150px; padding: 16px;
  background: rgba(0,0,0,0.2); border: 2px solid rgba(255,255,255,0.1);
  border-radius: var(--radius); color: var(--parchment);
  font-family: 'Inter', sans-serif; font-size: 15px;
  line-height: 1.6; resize: vertical;
  transition: var(--transition);
}
.answer-textarea:focus {
  outline: none; border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(218,165,32,0.15);
}
.char-count { text-align: right; font-size: 12px; color: var(--text-muted); margin-top: 4px; }

.submit-btn {
  margin-top: 16px; padding: 12px 32px;
  background: var(--xp-gradient);
  border: none; border-radius: var(--radius-sm);
  color: var(--wood-dark); font-size: 15px; font-weight: 700;
  cursor: pointer; transition: var(--transition);
}
.submit-btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-glow); }

.model-answer-panel {
  margin-top: 24px; padding: 20px;
  background: rgba(76,175,80,0.08);
  border: 1px solid rgba(76,175,80,0.2);
  border-radius: var(--radius);
  animation: fadeSlideIn 0.4s ease;
}
.model-answer-panel h4 {
  color: var(--success); font-size: 14px; margin-bottom: 10px;
  text-transform: uppercase; letter-spacing: 1px;
}
.model-answer-text { line-height: 1.7; color: var(--parchment-dark, #e8d5b8); font-size: 14px; }

.self-eval {
  margin-top: 16px; display: flex; align-items: center; gap: 12px;
}
.self-eval-label { font-size: 14px; color: var(--text-muted); }
.star-rating { display: flex; gap: 4px; }
.star-btn {
  font-size: 28px; background: none; border: none;
  cursor: pointer; transition: var(--transition);
  filter: grayscale(1) opacity(0.3);
}
.star-btn.active { filter: none; opacity: 1; transform: scale(1.1); }
.star-btn:hover { transform: scale(1.2); }

.add-note-check {
  margin-top: 12px; display: flex; align-items: center; gap: 8px;
  font-size: 14px; color: var(--text-muted); cursor: pointer;
}
.add-note-check input { accent-color: var(--gold); }

/* ===== RESULTS PAGE ===== */
.results-container {
  max-width: 600px; margin: 40px auto; text-align: center;
  animation: fadeSlideIn 0.5s ease;
}
.score-circle-container { position: relative; width: 160px; height: 160px; margin: 0 auto 24px; }
.score-circle {
  width: 160px; height: 160px;
  transform: rotate(-90deg);
}
.score-circle-bg {
  fill: none; stroke: rgba(255,255,255,0.06); stroke-width: 8;
}
.score-circle-fill {
  fill: none; stroke-width: 8; stroke-linecap: round;
  stroke-dasharray: 440; stroke-dashoffset: 440;
  transition: stroke-dashoffset 1.5s cubic-bezier(0.4, 0, 0.2, 1);
}
.score-circle-text {
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  font-size: 36px; font-weight: 800; color: var(--gold-bright);
}
.results-title {
  font-family: 'Playfair Display', serif;
  font-size: 28px; margin-bottom: 8px;
}
.results-subtitle { color: var(--text-muted); font-size: 15px; margin-bottom: 24px; }

.results-stats {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px;
  margin-bottom: 24px;
}
.result-stat {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius); padding: 16px;
}
.result-stat-value { font-size: 24px; font-weight: 700; color: var(--gold); }
.result-stat-label { font-size: 12px; color: var(--text-muted); margin-top: 4px; }

.results-xp {
  background: rgba(255,215,0,0.08);
  border: 1px solid rgba(255,215,0,0.2);
  border-radius: var(--radius); padding: 16px;
  margin-bottom: 24px;
}
.results-xp-value { font-size: 28px; font-weight: 800; color: var(--gold-bright); }

.results-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.result-btn {
  padding: 12px 24px; border-radius: var(--radius-sm);
  border: 2px solid; font-size: 14px; font-weight: 600;
  cursor: pointer; transition: var(--transition);
  background: transparent;
}
.result-btn.primary {
  background: var(--xp-gradient); border-color: transparent;
  color: var(--wood-dark);
}
.result-btn.primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-glow); }
.result-btn.secondary {
  border-color: var(--gold-dim); color: var(--gold);
}
.result-btn.secondary:hover { background: rgba(218,165,32,0.1); }

/* ===== RANK UP CELEBRATION ===== */
.rankup-overlay {
  position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.85); z-index: 300;
  display: flex; align-items: center; justify-content: center;
  animation: fadeIn 0.3s ease;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.rankup-content {
  text-align: center; animation: rankupBounce 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}
@keyframes rankupBounce {
  0% { opacity: 0; transform: scale(0.3) translateY(40px); }
  60% { transform: scale(1.1) translateY(-10px); }
  100% { opacity: 1; transform: scale(1) translateY(0); }
}
.rankup-icon { font-size: 80px; margin-bottom: 16px; }
.rankup-label {
  font-size: 14px; color: var(--gold); text-transform: uppercase;
  letter-spacing: 3px; margin-bottom: 8px;
}
.rankup-name {
  font-family: 'Playfair Display', serif;
  font-size: 40px; font-weight: 800;
  background: linear-gradient(135deg, var(--gold-bright), #FFF8DC, var(--gold));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; margin-bottom: 16px;
}
.rankup-dismiss {
  padding: 10px 30px; background: var(--xp-gradient);
  border: none; border-radius: 20px; color: var(--wood-dark);
  font-size: 15px; font-weight: 700; cursor: pointer;
  transition: var(--transition);
}
.rankup-dismiss:hover { transform: scale(1.05); }

/* Confetti */
.confetti-container {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  pointer-events: none; z-index: 301; overflow: hidden;
}
.confetti {
  position: absolute; top: -10px;
  width: 8px; height: 8px; border-radius: 2px;
  animation: confettiFall 3s ease-in forwards;
}
@keyframes confettiFall {
  0% { transform: translateY(0) rotate(0deg); opacity: 1; }
  100% { transform: translateY(100vh) rotate(720deg); opacity: 0; }
}

/* ===== MISTAKE JOURNAL ===== */
.mistake-tabs {
  display: flex; gap: 8px; margin-bottom: 24px; flex-wrap: wrap;
}
.mistake-tab {
  padding: 8px 16px; border-radius: 20px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  color: var(--text-muted); cursor: pointer;
  font-size: 13px; font-weight: 500;
  transition: var(--transition);
}
.mistake-tab:hover { background: rgba(218,165,32,0.1); color: var(--gold); }
.mistake-tab.active { background: rgba(218,165,32,0.15); border-color: var(--gold); color: var(--gold); }
.mistake-tab .count {
  background: rgba(229,57,53,0.3); color: #FF8A80;
  padding: 1px 8px; border-radius: 10px; margin-left: 6px;
  font-size: 11px;
}

.mistake-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius); padding: 20px;
  margin-bottom: 12px; transition: var(--transition);
}
.mistake-card.due-review {
  border-color: rgba(255,152,0,0.4);
  background: rgba(255,152,0,0.05);
}
.mistake-card.resolved {
  opacity: 0.4; text-decoration: line-through;
}
.mistake-question { font-size: 15px; margin-bottom: 10px; color: var(--parchment); }
.mistake-answers { font-size: 13px; margin-bottom: 12px; }
.mistake-your { color: var(--error); }
.mistake-correct { color: var(--success); }
.mistake-meta { display: flex; justify-content: space-between; align-items: center; }
.mistake-date { font-size: 12px; color: var(--text-muted); }
.revise-btn {
  padding: 6px 16px; border-radius: 16px;
  background: rgba(76,175,80,0.15); border: 1px solid rgba(76,175,80,0.3);
  color: var(--success); cursor: pointer; font-size: 12px; font-weight: 600;
  transition: var(--transition);
}
.revise-btn:hover { background: rgba(76,175,80,0.25); }

/* ===== DASHBOARD ===== */
.dashboard-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px; margin-bottom: 24px;
}
.dash-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius); padding: 20px;
  transition: var(--transition);
}
.dash-card:hover { border-color: rgba(218,165,32,0.3); }
.dash-card-value { font-size: 32px; font-weight: 800; color: var(--gold-bright); }
.dash-card-label { font-size: 13px; color: var(--text-muted); margin-top: 4px; }

.dash-charts {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
}
.dash-chart-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius); padding: 20px;
}
.dash-chart-card h3 {
  font-size: 14px; color: var(--text-muted); margin-bottom: 16px;
  text-transform: uppercase; letter-spacing: 1px;
}
.dash-chart-card canvas { width: 100%; }

.heatmap-grid {
  display: grid; grid-template-columns: repeat(7, 1fr); gap: 3px;
}
.heatmap-cell {
  aspect-ratio: 1; border-radius: 3px;
  background: rgba(255,255,255,0.04);
  transition: var(--transition);
}
.heatmap-cell.l1 { background: rgba(218,165,32,0.2); }
.heatmap-cell.l2 { background: rgba(218,165,32,0.4); }
.heatmap-cell.l3 { background: rgba(218,165,32,0.6); }
.heatmap-cell.l4 { background: rgba(218,165,32,0.85); }

/* ===== NOTES PAGE ===== */
.notes-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 20px;
}
.notes-header h2 {
  font-family: 'Playfair Display', serif; font-size: 24px;
}
.add-note-btn {
  padding: 8px 20px; background: var(--xp-gradient);
  border: none; border-radius: var(--radius-sm);
  color: var(--wood-dark); font-weight: 700; font-size: 13px;
  cursor: pointer; transition: var(--transition);
}
.add-note-btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-glow); }

.notes-search {
  width: 100%; padding: 12px 16px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius); color: var(--text-light);
  font-size: 14px; margin-bottom: 20px;
  transition: var(--transition);
}
.notes-search:focus { outline: none; border-color: var(--gold); }
.notes-search::placeholder { color: var(--text-muted); }

.note-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius); padding: 16px;
  margin-bottom: 12px; cursor: pointer;
  transition: var(--transition);
  animation: fadeSlideIn 0.3s ease backwards;
}
.note-card:hover { border-color: var(--gold-dim); background: rgba(255,255,255,0.06); }
.note-card.pinned { border-color: var(--gold); }
.note-card-title { font-size: 15px; font-weight: 600; margin-bottom: 6px; }
.note-card-preview { font-size: 13px; color: var(--text-muted); line-height: 1.5; }
.note-card-meta { display: flex; justify-content: space-between; margin-top: 8px; font-size: 11px; color: var(--text-muted); }

/* ===== ACHIEVEMENTS PAGE ===== */
.achievements-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}
.badge-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius); padding: 20px;
  text-align: center; transition: var(--transition);
  position: relative;
}
.badge-card:hover { transform: translateY(-3px); }
.badge-card.earned {
  border-color: var(--gold);
  background: rgba(218,165,32,0.08);
  animation: badgeGlow 3s ease-in-out infinite alternate;
}
@keyframes badgeGlow {
  0% { box-shadow: 0 0 5px rgba(218,165,32,0.1); }
  100% { box-shadow: 0 0 15px rgba(218,165,32,0.3); }
}
.badge-card.locked { opacity: 0.35; filter: grayscale(1); }
.badge-icon { font-size: 40px; margin-bottom: 10px; }
.badge-name { font-size: 14px; font-weight: 600; margin-bottom: 4px; }
.badge-desc { font-size: 11px; color: var(--text-muted); line-height: 1.4; }
.badge-date { font-size: 10px; color: var(--gold-dim); margin-top: 8px; }

/* ===== NOTE MODAL ===== */
.modal-overlay {
  position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.7); z-index: 250;
  display: flex; align-items: center; justify-content: center;
  animation: fadeIn 0.2s ease;
}
.modal {
  background: var(--wood-mid); border: 1px solid var(--wood-accent);
  border-radius: var(--radius-lg); padding: 28px;
  width: 90%; max-width: 500px; max-height: 80vh; overflow-y: auto;
  animation: fadeSlideIn 0.3s ease;
}
.modal h3 {
  font-family: 'Playfair Display', serif; font-size: 20px; margin-bottom: 16px;
}
.modal input, .modal textarea, .modal select {
  width: 100%; padding: 10px 14px;
  background: rgba(0,0,0,0.3); border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-sm); color: var(--text-light);
  font-family: 'Inter', sans-serif; font-size: 14px;
  margin-bottom: 12px; transition: var(--transition);
}
.modal input:focus, .modal textarea:focus, .modal select:focus {
  outline: none; border-color: var(--gold);
}
.modal textarea { min-height: 120px; resize: vertical; }
.modal select option { background: var(--wood-dark); }
.modal-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 16px; }
.modal-btn {
  padding: 8px 20px; border-radius: var(--radius-sm);
  font-size: 13px; font-weight: 600; cursor: pointer;
  transition: var(--transition); border: 1px solid;
}
.modal-btn.save { background: var(--xp-gradient); border-color: transparent; color: var(--wood-dark); }
.modal-btn.save:hover { transform: translateY(-1px); }
.modal-btn.cancel { background: transparent; border-color: rgba(255,255,255,0.2); color: var(--text-muted); }
.modal-btn.cancel:hover { border-color: var(--error); color: var(--error); }
.modal-btn.danger { background: transparent; border-color: rgba(229,57,53,0.3); color: var(--error); }
.modal-btn.danger:hover { background: rgba(229,57,53,0.1); }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .top-bar { padding: 6px 12px; height: 50px; }
  .logo { font-size: 16px; }
  .rank-badge { font-size: 10px; padding: 3px 8px; }
  .rank-badge .rank-icon { font-size: 14px; }
  .top-bar-center { display: none; }
  .main-content { padding: 16px; }
  .bookshelf { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; }
  .bookshelf-header h1 { font-size: 26px; }
  .chapters-grid { grid-template-columns: 1fr; }
  .question-card { padding: 20px; }
  .question-text { font-size: 16px; }
  .results-stats { grid-template-columns: repeat(3, 1fr); gap: 8px; }
  .result-stat { padding: 12px; }
  .result-stat-value { font-size: 20px; }
  .dash-charts { grid-template-columns: 1fr; }
  .achievements-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
  .daily-challenge-banner { flex-direction: column; text-align: center; gap: 12px; }
}
@media (max-width: 480px) {
  .bookshelf { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .book-card { padding: 16px 12px; }
  .book-icon { font-size: 36px; }
  .book-title { font-size: 13px; }
}

/* ===== EMPTY STATE ===== */
.empty-state {
  text-align: center; padding: 60px 20px; color: var(--text-muted);
}
.empty-state-icon { font-size: 64px; margin-bottom: 16px; opacity: 0.5; }
.empty-state-text { font-size: 16px; }