/* === PrepMundo Sub-App CSS — Outfit + Nunito Design System === */
/* Colors: Navy #0B2447, Amber #F59E0B, Green #10B981, Warm White #F7F6F3 */

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

:root {
  --primary: #0B2447;
  --primary-hover: #0a1e3a;
  --primary-light: #EEF1F8;
  --primary-subtle: #C7D2E4;
  --accent: #dc2626;
  --accent-light: #fef2f2;
  --amber: #F59E0B;
  --amber-light: #FFFBEB;
  --amber-subtle: #FDE68A;
  --success: #10B981;
  --success-light: #ECFDF5;
  --success-subtle: #A7F3D0;
  --warning: #F59E0B;
  --warning-light: #FFFBEB;
  --bg: #F7F6F3;
  --surface: #ffffff;
  --surface-raised: #ffffff;
  --text: #1A2332;
  --text-secondary: #4B5563;
  --text-muted: rgba(26,35,50,.45);
  --border: #E5E2DC;
  --border-light: #F0EDE6;
  --radius: 10px;
  --radius-lg: 14px;
  --radius-xl: 18px;
  --radius-full: 9999px;
  --shadow-xs: 0 1px 2px rgba(11,36,71,0.05);
  --shadow: 0 1px 3px rgba(11,36,71,0.06), 0 1px 2px rgba(11,36,71,0.04);
  --shadow-md: 0 4px 6px -1px rgba(11,36,71,0.08), 0 2px 4px -2px rgba(11,36,71,0.05);
  --shadow-lg: 0 10px 24px rgba(11,36,71,0.1), 0 4px 8px rgba(11,36,71,0.06);
  --shadow-xl: 0 20px 40px rgba(11,36,71,0.12), 0 8px 16px rgba(11,36,71,0.06);
  --max-width: 960px;
  --header-height: 60px;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

body {
  font-family: 'Nunito', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; height: auto; }
a { color: var(--primary); text-decoration: none; }
button { cursor: pointer; font-family: inherit; }

/* === PrepMundo Brand Bar === */
.prepmundo-bar {
  background: var(--primary);
  padding: 6px 20px;
  display: flex;
  align-items: center;
}

.prepmundo-bar-link {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.9);
  letter-spacing: 0.01em;
  transition: color 0.2s;
}

.prepmundo-bar-link:hover {
  color: #fff;
}

.prepmundo-bar-logo {
  width: 20px;
  height: 20px;
  object-fit: contain;
  border-radius: 4px;
  opacity: 0.9;
}

.prepmundo-bar-sep {
  margin: 0 6px;
  color: rgba(255,255,255,0.3);
  font-size: 0.9rem;
}

/* Override inline span colors in prepmundo-bar */
.prepmundo-bar-link span span[style] {
  color: var(--amber) !important;
}

/* === Header === */
.header {
  background: var(--primary);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 16px rgba(11,36,71,0.2);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  color: #fff;
  font-family: 'Outfit', sans-serif;
  font-weight: 800;
  font-size: 1.1rem;
  white-space: nowrap;
  letter-spacing: -0.02em;
}

.nav {
  display: flex;
  gap: 2px;
}

.nav a {
  color: rgba(255,255,255,0.75);
  padding: 7px 13px;
  border-radius: var(--radius);
  font-family: 'Nunito', sans-serif;
  font-size: 0.875rem;
  font-weight: 600;
  transition: all 0.2s var(--ease);
}

.nav a:hover {
  background: rgba(255,255,255,0.12);
  color: #fff;
}

.nav a.active {
  background: rgba(245,158,11,0.2);
  color: var(--amber);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.lang-toggle {
  background: rgba(255,255,255,0.12);
  color: rgba(255,255,255,0.9);
  border: 1px solid rgba(255,255,255,0.2);
  padding: 5px 12px;
  border-radius: var(--radius-full);
  font-family: 'Outfit', sans-serif;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  transition: all 0.2s var(--ease);
}

.lang-toggle:hover {
  background: rgba(245,158,11,0.25);
  color: var(--amber);
  border-color: rgba(245,158,11,0.4);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: rgba(255,255,255,0.9);
  font-size: 1.4rem;
  padding: 4px;
}

/* === Main Content === */
#app {
  flex: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 28px 24px 40px;
  width: 100%;
}

/* === Footer === */
.footer {
  background: var(--primary);
  color: rgba(255,255,255,0.55);
  text-align: center;
  padding: 24px;
  font-size: 0.78rem;
  margin-top: auto;
  font-family: 'Nunito', sans-serif;
}

.footer a {
  color: rgba(255,255,255,0.7);
}

.footer a:hover {
  color: var(--amber);
}

.footer p + p { margin-top: 4px; }

/* === Home Page Hero === */
.hero {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin-bottom: 28px;
}

.hero-img {
  width: 100%;
  height: 280px;
  object-fit: cover;
  display: block;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(11,36,71,0.9) 0%, rgba(11,36,71,0.65) 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 32px;
  color: #fff;
}

.hero-overlay h1 {
  font-family: 'Outfit', sans-serif;
  font-size: 1.85rem;
  font-weight: 800;
  margin-bottom: 8px;
  letter-spacing: -0.03em;
  line-height: 1.2;
}

.hero-overlay p {
  font-size: 1rem;
  opacity: 0.85;
  font-weight: 400;
  max-width: 500px;
}

/* === Stats Bar === */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 28px;
}

.stat {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
  border: 1px solid var(--border);
  transition: all 0.2s var(--ease);
}

.stat:hover {
  border-color: var(--primary-subtle);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.stat-number {
  font-family: 'Outfit', sans-serif;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 2px;
}

/* === CTA Cards (Home Screen) === */
.cta-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.cta-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 18px 22px;
  display: flex;
  align-items: center;
  gap: 18px;
  transition: all 0.25s var(--ease);
  cursor: pointer;
  border: 1.5px solid var(--border);
  width: 100%;
  text-align: left;
  font-size: 1rem;
  color: var(--text);
}

.cta-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-subtle);
}

.cta-icon {
  font-size: 1.65rem;
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-light);
  border-radius: var(--radius);
}

.cta-card h3 {
  font-family: 'Outfit', sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 2px;
  letter-spacing: -0.01em;
  color: var(--primary);
}

.cta-card p {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* === Exam Page === */
.exam-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 8px;
}

.exam-timer {
  font-family: 'Outfit', sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--primary);
  background: var(--primary-light);
  padding: 7px 16px;
  border-radius: var(--radius-full);
  letter-spacing: 0.04em;
  border: 1.5px solid var(--primary-subtle);
}

.exam-timer.warning {
  color: var(--accent);
  background: var(--accent-light);
  border-color: #fca5a5;
  animation: pulse 1s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

.exam-progress {
  width: 100%;
  height: 5px;
  background: var(--border);
  border-radius: var(--radius-full);
  margin-bottom: 24px;
  overflow: hidden;
}

.exam-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--amber), var(--success));
  border-radius: var(--radius-full);
  transition: width 0.4s var(--ease);
}

/* === Question Card === */
.question-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 28px;
  border: 1px solid var(--border);
  margin-bottom: 16px;
  box-shadow: var(--shadow-xs);
}

.question-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.question-category {
  background: var(--primary-light);
  color: var(--primary);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.question-text {
  font-family: 'Outfit', sans-serif;
  font-size: 1.08rem;
  font-weight: 600;
  margin-bottom: 20px;
  line-height: 1.5;
  letter-spacing: -0.01em;
  color: var(--text);
}

.question-image {
  margin-bottom: 20px;
  text-align: center;
}

.question-image img {
  max-height: 200px;
  border-radius: var(--radius);
}

.options-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.option-btn {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 13px 18px;
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-family: 'Nunito', sans-serif;
  font-size: 0.95rem;
  text-align: left;
  transition: all 0.2s var(--ease);
  cursor: pointer;
  color: var(--text);
}

.option-btn:hover:not(.disabled) {
  border-color: var(--primary-subtle);
  background: var(--primary-light);
  transform: translateX(4px);
}

.option-btn.selected {
  border-color: var(--amber);
  background: var(--amber-light);
  font-weight: 600;
}

.option-btn.correct {
  border-color: var(--success);
  background: var(--success-light);
}

.option-btn.incorrect {
  border-color: var(--accent);
  background: var(--accent-light);
}

.option-btn.disabled {
  cursor: default;
}

.option-letter {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
  transition: all 0.2s var(--ease);
}

.option-btn.selected .option-letter {
  background: var(--amber);
  color: #fff;
}

.option-btn.correct .option-letter {
  background: var(--success);
  color: #fff;
}

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

.explanation {
  background: var(--success-light);
  border-left: 3px solid var(--success);
  padding: 14px 18px;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin-top: 16px;
  font-size: 0.9rem;
  color: #065f46;
  line-height: 1.6;
}

.explanation.incorrect-explanation {
  background: var(--accent-light);
  border-left-color: var(--accent);
  color: #991b1b;
}

.exam-nav {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 20px;
}

/* === Buttons === */
.btn {
  padding: 10px 22px;
  border-radius: var(--radius);
  border: none;
  font-family: 'Outfit', sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  transition: all 0.2s var(--ease);
  letter-spacing: -0.01em;
}

.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(11,36,71,0.25);
}

.btn-primary:hover {
  background: var(--primary-hover);
  box-shadow: 0 6px 16px rgba(11,36,71,0.3);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border: 1.5px solid var(--border);
}

.btn-secondary:hover {
  background: var(--border-light);
  border-color: var(--primary-subtle);
}

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

.btn-danger:hover { background: #b91c1c; }

.btn-hard {
  background: var(--amber-light);
  border: 1.5px solid var(--amber);
  color: #92400e;
  padding: 7px 14px;
  font-size: 0.8rem;
  border-radius: var(--radius-full);
  font-weight: 700;
  transition: all 0.2s var(--ease);
}

.btn-hard.active {
  background: var(--amber);
  color: #fff;
  border-color: var(--amber);
  box-shadow: 0 2px 8px rgba(245,158,11,0.35);
}

/* === Results === */
.results-card {
  background: var(--surface);
  border-radius: var(--radius-xl);
  padding: 40px 28px;
  border: 1px solid var(--border);
  text-align: center;
  margin-bottom: 24px;
  box-shadow: var(--shadow-md);
}

.results-score {
  font-family: 'Outfit', sans-serif;
  font-size: 4rem;
  font-weight: 900;
  margin: 12px 0;
  letter-spacing: -0.05em;
}

.results-score.pass { color: var(--success); }
.results-score.fail { color: var(--accent); }

.results-badge {
  display: inline-block;
  padding: 7px 24px;
  border-radius: var(--radius-full);
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 20px;
  letter-spacing: 0.04em;
}

.results-badge.pass {
  background: var(--success-light);
  color: var(--success);
  border: 1.5px solid var(--success-subtle);
}

.results-badge.fail {
  background: var(--accent-light);
  color: var(--accent);
  border: 1.5px solid #fca5a5;
}

.results-details {
  display: flex;
  justify-content: center;
  gap: 32px;
  margin-top: 20px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.results-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* === Question Bank === */
.category-pills {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  margin-bottom: 20px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.category-pills::-webkit-scrollbar {
  display: none;
}

.category-pill {
  padding: 7px 16px;
  border-radius: var(--radius-full);
  border: 1.5px solid var(--border);
  background: var(--surface);
  font-family: 'Outfit', sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
  transition: all 0.2s var(--ease);
  color: var(--text-secondary);
  cursor: pointer;
}

.category-pill:hover {
  border-color: var(--primary-subtle);
  background: var(--primary-light);
  color: var(--primary);
}

.category-pill.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(11,36,71,0.25);
}

.bank-progress {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  font-weight: 600;
}

/* === Hard Questions / Empty State === */
.empty-state {
  text-align: center;
  padding: 64px 24px;
  color: var(--text-muted);
}

.empty-state-icon {
  font-size: 3.5rem;
  margin-bottom: 16px;
}

.empty-state h2 {
  margin-bottom: 8px;
  color: var(--text);
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
}

.empty-state p {
  max-width: 360px;
  margin: 0 auto;
  line-height: 1.6;
}

/* === Resources === */
.resource-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.resource-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  border: 1px solid var(--border);
  display: block;
  transition: all 0.25s var(--ease);
  color: var(--text);
}

.resource-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-subtle);
}

.resource-card h3 {
  margin-bottom: 5px;
  color: var(--primary);
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 1rem;
}

.resource-card p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.resource-steps {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 28px;
  border: 1px solid var(--border);
  margin-top: 20px;
}

.resource-steps h2 {
  margin-bottom: 16px;
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--primary);
}

.resource-steps ol {
  padding-left: 24px;
}

.resource-steps li {
  margin-bottom: 12px;
  line-height: 1.6;
  color: var(--text-secondary);
}

/* === Exam Start === */
.exam-start {
  text-align: center;
  padding: 32px;
}

.exam-start h2 {
  margin-bottom: 12px;
  font-family: 'Outfit', sans-serif;
  font-weight: 800;
  letter-spacing: -0.02em;
  font-size: 1.4rem;
  color: var(--primary);
}

.exam-info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 24px 0;
  text-align: left;
}

.exam-info-item {
  background: var(--bg);
  padding: 14px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.exam-info-item strong {
  display: block;
  font-family: 'Outfit', sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}

/* === Section Title === */
.section-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 20px;
  letter-spacing: -0.03em;
  color: var(--primary);
}

/* === Study Guide === */
.study-topics-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-top: 20px;
}

.study-topic-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 20px 22px;
  display: flex;
  align-items: center;
  gap: 18px;
  transition: all 0.25s var(--ease);
  cursor: pointer;
  border: 1.5px solid var(--border);
  width: 100%;
  text-align: left;
  font-size: 1rem;
  color: var(--text);
}

.study-topic-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-subtle);
}

.study-topic-card.read {
  border-color: var(--success-subtle);
  background: linear-gradient(135deg, var(--surface) 0%, var(--success-light) 100%);
}

.study-topic-icon {
  font-size: 1.6rem;
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-light);
  border-radius: var(--radius);
}

.study-topic-card.read .study-topic-icon {
  background: var(--success-light);
}

.study-topic-info {
  flex: 1;
}

.study-topic-info h3 {
  font-family: 'Outfit', sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 2px;
  letter-spacing: -0.01em;
  color: var(--primary);
}

.study-topic-info p {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.study-topic-status {
  font-family: 'Outfit', sans-serif;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  white-space: nowrap;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: var(--border-light);
}

.study-topic-card.read .study-topic-status {
  color: var(--success);
  background: var(--success-light);
}

.study-progress-bar {
  width: 100%;
  height: 6px;
  background: var(--border);
  border-radius: var(--radius-full);
  margin-bottom: 20px;
  overflow: hidden;
}

.study-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--success), #34D399);
  border-radius: var(--radius-full);
  transition: width 0.4s var(--ease);
}

/* === Study Content === */
.study-header {
  margin-bottom: 20px;
}

.study-content {
  background: var(--surface);
  border-radius: var(--radius-xl);
  padding: 36px;
  border: 1px solid var(--border);
  margin-bottom: 24px;
  box-shadow: var(--shadow-xs);
}

.study-section {
  margin-bottom: 36px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border-light);
}

.study-section:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.study-section h3 {
  font-family: 'Outfit', sans-serif;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 14px;
  letter-spacing: -0.02em;
  position: relative;
  padding-left: 16px;
}

.study-section h3::before {
  content: '';
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 4px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--amber), var(--primary));
}

.study-section p {
  margin-bottom: 14px;
  line-height: 1.8;
  color: var(--text-secondary);
}

.study-section ul, .study-section ol {
  padding-left: 24px;
  margin-bottom: 14px;
}

.study-section li {
  margin-bottom: 8px;
  line-height: 1.7;
  color: var(--text-secondary);
}

.study-image {
  display: block;
  max-width: 100%;
  max-height: 300px;
  margin: 20px auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.study-fact {
  background: linear-gradient(135deg, var(--amber-light) 0%, var(--primary-light) 100%);
  border-left: 4px solid var(--amber);
  padding: 16px 20px;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 20px 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.study-timeline {
  margin: 20px 0;
  padding-left: 20px;
  border-left: 2px solid var(--primary-subtle);
}

.timeline-item {
  padding: 10px 0 10px 20px;
  position: relative;
  line-height: 1.6;
  color: var(--text-secondary);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -7px;
  top: 16px;
  width: 12px;
  height: 12px;
  border-radius: var(--radius-full);
  background: var(--amber);
  border: 3px solid var(--amber-light);
}

.timeline-date {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  color: var(--primary);
  margin-right: 8px;
  font-variant-numeric: tabular-nums;
}

.study-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 20px 0;
  font-size: 0.9rem;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
}

.study-table th, .study-table td {
  padding: 12px 16px;
  text-align: left;
}

.study-table th {
  background: var(--primary);
  color: #fff;
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.study-table td {
  border-top: 1px solid var(--border-light);
  color: var(--text-secondary);
}

.study-table tr:nth-child(even) td {
  background: var(--bg);
}

.study-table tr:hover td {
  background: var(--primary-light);
}

.study-nav {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

/* === Infographics === */
.infographic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.infographic-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: all 0.25s var(--ease);
}

.infographic-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-subtle);
}

.infographic-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  display: block;
}

.infographic-card-body {
  padding: 16px;
}

.infographic-card-body h3 {
  font-family: 'Outfit', sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 4px;
}

.infographic-card-body p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* === Tabs / Page Sections === */
.tabs {
  display: flex;
  gap: 2px;
  background: var(--border-light);
  border-radius: var(--radius);
  padding: 4px;
  margin-bottom: 20px;
}

.tab {
  flex: 1;
  padding: 9px 16px;
  border: none;
  border-radius: 7px;
  font-family: 'Outfit', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: transparent;
  cursor: pointer;
  transition: all 0.2s var(--ease);
}

.tab.active {
  background: var(--surface);
  color: var(--primary);
  box-shadow: var(--shadow);
}

/* === Badges & Tags === */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-family: 'Outfit', sans-serif;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.badge-primary {
  background: var(--primary-light);
  color: var(--primary);
}

.badge-amber {
  background: var(--amber-light);
  color: #92400e;
}

.badge-success {
  background: var(--success-light);
  color: #065f46;
}

/* === Mobile Responsive === */
@media (max-width: 768px) {
  .header-inner {
    padding: 0 16px;
  }

  .nav {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--primary);
    flex-direction: column;
    padding: 8px;
    border-top: 1px solid rgba(255,255,255,0.1);
    box-shadow: 0 8px 24px rgba(11,36,71,0.3);
  }

  .nav.open {
    display: flex;
  }

  .nav a {
    padding: 12px 16px;
    border-radius: var(--radius);
    color: rgba(255,255,255,0.8);
  }

  .nav a:hover, .nav a.active {
    background: rgba(255,255,255,0.12);
    color: #fff;
  }

  .menu-toggle {
    display: block;
  }

  #app {
    padding: 20px 16px 32px;
  }

  .hero-overlay h1 {
    font-size: 1.4rem;
  }

  .hero-img {
    height: 200px;
  }

  .hero-overlay {
    padding: 20px;
  }

  .exam-info-grid {
    grid-template-columns: 1fr;
  }

  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  .stat {
    padding: 12px 10px;
  }

  .results-details {
    gap: 16px;
    flex-wrap: wrap;
  }

  .study-content {
    padding: 20px 16px;
  }

  .question-card {
    padding: 20px 16px;
  }

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

  .tabs {
    flex-wrap: wrap;
  }
}

@media (max-width: 480px) {
  .section-title {
    font-size: 1.2rem;
  }

  .results-score {
    font-size: 3rem;
  }

  .exam-timer {
    font-size: 0.9rem;
  }
}