/* ==========================================================================
   BRAIN-FRIENDLY ENGLISH — MODERN LUXURY UX/UI STYLESHEET
   Exclusive Typography: Cinzel Decorative, Playfair Display, Plus Jakarta Sans, JetBrains Mono
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Cinzel+Decorative:wght@700;900&family=Cinzel:wght@500;600;700;800&family=JetBrains+Mono:wght@400;500;600&family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400;1,600&family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

:root {
  /* Color Palette */
  --bg-dark: #070d17;
  --bg-deep: #0a1320;
  --bg-card: rgba(14, 25, 41, 0.72);
  --bg-card-hover: rgba(20, 35, 58, 0.85);
  --bg-card-solid: #0e1929;
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(245, 158, 11, 0.35);
  --border-teal-glow: rgba(20, 184, 166, 0.35);

  /* Accents */
  --gold-primary: #f59e0b;
  --gold-light: #fbbf24;
  --gold-dark: #d97706;
  --gold-glow: 0 0 25px rgba(245, 158, 11, 0.3);
  --gold-glow-lg: 0 0 45px rgba(245, 158, 11, 0.45);

  --teal-accent: #14b8a6;
  --teal-light: #2dd4bf;
  --teal-glow: 0 0 25px rgba(20, 184, 166, 0.3);

  /* Text */
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-gold: #fde68a;

  /* Typography */
  --font-display: 'Cinzel Decorative', 'Cinzel', serif;
  --font-serif: 'Playfair Display', Georgia, serif;
  --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Layout */
  --max-w: 1240px;
  --header-h: 76px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Light Theme Variables */
[data-theme="light"] {
  --bg-dark: #f6f8fb;
  --bg-deep: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.88);
  --bg-card-hover: rgba(255, 255, 255, 0.98);
  --bg-card-solid: #ffffff;
  --border-subtle: rgba(15, 23, 42, 0.08);
  --border-glow: rgba(217, 119, 6, 0.4);
  --border-teal-glow: rgba(13, 148, 136, 0.4);
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-gold: #b45309;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  background-color: var(--bg-dark);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Canvas Background for Bioluminescent Ocean */
#ambient-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.65;
}

/* Lighthouse Ambient Beam */
.lighthouse-beam {
  position: absolute;
  top: -120px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 600px;
  background: radial-gradient(ellipse at top, rgba(245, 158, 11, 0.15) 0%, rgba(20, 184, 166, 0.06) 45%, transparent 70%);
  filter: blur(40px);
  pointer-events: none;
  z-index: 1;
  animation: pulseBeam 9s ease-in-out infinite alternate;
}

@keyframes pulseBeam {
  0% { opacity: 0.55; transform: translateX(-50%) rotate(-3deg) scale(0.96); }
  50% { opacity: 0.85; transform: translateX(-50%) rotate(2deg) scale(1.05); }
  100% { opacity: 0.55; transform: translateX(-50%) rotate(-3deg) scale(0.96); }
}

/* Typography Utilities */
.font-display { font-family: var(--font-display); }
.font-serif { font-family: var(--font-serif); }
.font-sans { font-family: var(--font-sans); }
.font-mono { font-family: var(--font-mono); }

.text-gold { color: var(--gold-primary); }
.text-teal { color: var(--teal-accent); }
.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }

/* Container */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 2;
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(7, 13, 23, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: var(--transition);
}

[data-theme="light"] .site-header {
  background: rgba(255, 255, 255, 0.88);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-primary);
  transition: var(--transition);
}

.brand-link:hover .brand-beacon {
  box-shadow: var(--gold-glow);
  transform: rotate(12deg) scale(1.05);
}

.brand-beacon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, var(--gold-light), #b45309);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 16px rgba(245, 158, 11, 0.4);
  transition: var(--transition);
  color: #070d17;
  font-size: 1.1rem;
}

.brand-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.04em;
  background: linear-gradient(135deg, #ffffff 40%, var(--gold-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

[data-theme="light"] .brand-title {
  background: linear-gradient(135deg, #0f172a 40%, #d97706 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
  padding: 0.5rem 0.8rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.nav-link:hover, .nav-link.active {
  color: var(--gold-primary);
  background: rgba(245, 158, 11, 0.08);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.88rem;
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-full);
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  outline: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--gold-primary), var(--gold-dark));
  color: #070d17;
  box-shadow: 0 4px 16px rgba(245, 158, 11, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--gold-glow);
  background: linear-gradient(135deg, var(--gold-light), var(--gold-primary));
}

.btn-teal {
  background: linear-gradient(135deg, var(--teal-accent), #0f766e);
  color: #ffffff;
  box-shadow: 0 4px 16px rgba(20, 184, 166, 0.3);
}

.btn-teal:hover {
  transform: translateY(-2px);
  box-shadow: var(--teal-glow);
  background: linear-gradient(135deg, var(--teal-light), var(--teal-accent));
}

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

.btn-outline:hover {
  border-color: var(--gold-primary);
  color: var(--gold-primary);
  background: rgba(245, 158, 11, 0.06);
}

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 50%;
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  color: var(--text-secondary);
}

.btn-icon:hover {
  color: var(--gold-primary);
  border-color: var(--gold-primary);
}

.btn-sm {
  padding: 0.4rem 0.85rem;
  font-size: 0.8rem;
}

.btn-lg {
  padding: 0.9rem 2rem;
  font-size: 1rem;
}

/* Badge Pill */
.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  background: rgba(245, 158, 11, 0.12);
  color: var(--gold-primary);
  border: 1px solid rgba(245, 158, 11, 0.25);
}

.badge-teal {
  background: rgba(20, 184, 166, 0.12);
  color: var(--teal-light);
  border-color: rgba(20, 184, 166, 0.25);
}

/* Hero Section */
.hero-section {
  padding: 5rem 0 4rem;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 4.2vw, 3.8rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0.02em;
}

.hero-title span {
  display: block;
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  background: linear-gradient(135deg, var(--gold-light), var(--gold-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 580px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.5rem;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.hero-meta-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.hero-meta-icon {
  color: var(--gold-primary);
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  margin-top: 0.5rem;
}

/* Hero Book Showcase Card */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.book-glow-box {
  position: relative;
  width: 100%;
  max-width: 380px;
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  background: linear-gradient(160deg, rgba(20, 35, 58, 0.8) 0%, rgba(10, 19, 32, 0.95) 100%);
  border: 1px solid var(--border-glow);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6), var(--gold-glow);
  transition: var(--transition);
}

.book-glow-box:hover {
  transform: translateY(-6px) scale(1.02);
  border-color: var(--gold-primary);
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.7), var(--gold-glow-lg);
}

.book-cover-img {
  width: 100%;
  height: 380px;
  object-fit: cover;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  display: block;
}

.book-badge-overlay {
  position: absolute;
  top: 2.2rem;
  right: 2.2rem;
  background: rgba(7, 13, 23, 0.88);
  backdrop-filter: blur(8px);
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--gold-primary);
  color: var(--gold-light);
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
}

.book-card-footer {
  margin-top: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.book-price-tag {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--gold-primary);
}

.book-format-tag {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* Sections Common */
.section {
  padding: 5rem 0;
  position: relative;
}

.section-alt {
  background: rgba(10, 19, 32, 0.65);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 3.5rem;
}

.section-eyebrow {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold-primary);
  margin-bottom: 0.75rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.2vw, 2.75rem);
  font-weight: 700;
  line-height: 1.25;
}

.section-title span {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  color: var(--gold-primary);
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-top: 1rem;
  line-height: 1.7;
}

/* Glass Card */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.glass-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(245, 158, 11, 0.3);
  transform: translateY(-4px);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4);
}

/* 3 Core Principles Grid */
.principles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.principle-card {
  padding: 2.25rem 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.principle-num {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--gold-primary);
  opacity: 0.85;
}

.principle-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
}

.principle-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* Chapters Matrix & Browser */
.stage-tabs {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.stage-tab-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.stage-tab-btn.active, .stage-tab-btn:hover {
  background: rgba(245, 158, 11, 0.15);
  border-color: var(--gold-primary);
  color: var(--gold-light);
}

.chapters-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 1.25rem;
}

.chapter-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 200px;
  cursor: pointer;
}

.chapter-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.75rem;
}

.chapter-number {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: rgba(245, 158, 11, 0.4);
  transition: var(--transition);
}

.chapter-card:hover .chapter-number {
  color: var(--gold-primary);
  transform: scale(1.1);
}

.chapter-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.chapter-tense {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--gold-primary);
  font-style: italic;
}

.chapter-card-footer {
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
}

.chapter-free-tag {
  color: var(--teal-light);
  font-weight: 600;
}

.chapter-locked-tag {
  color: var(--text-muted);
}

/* Story Reader Modal / Drawer */
.reader-modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(4, 8, 14, 0.95);
  backdrop-filter: blur(20px);
  display: none;
  overflow-y: auto;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.reader-modal.open {
  display: flex;
  flex-direction: column;
  opacity: 1;
}

.reader-toolbar {
  position: sticky;
  top: 0;
  background: rgba(7, 13, 23, 0.92);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  z-index: 10;
}

.reader-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.reader-content-wrap {
  max-width: 760px;
  margin: 3rem auto;
  padding: 0 1.5rem 5rem;
}

.reader-chapter-num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold-primary);
  margin-bottom: 0.5rem;
}

.reader-chapter-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.reader-tense-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.25);
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  color: var(--gold-light);
  margin-bottom: 2.5rem;
}

.reader-story-body {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  line-height: 2;
  color: #e2e8f0;
}

.reader-story-body p {
  margin-bottom: 1.75rem;
}

.reader-story-body strong {
  font-weight: 700;
  color: var(--gold-light);
  background: rgba(245, 158, 11, 0.12);
  padding: 0.1em 0.3em;
  border-radius: 4px;
}

.reader-key-examples-box {
  background: var(--bg-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin-top: 3rem;
}

.reader-key-examples-box h4 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--gold-primary);
  margin-bottom: 0.75rem;
}

.reader-key-examples-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.95rem;
}

/* Grammar Matrix Interactive View */
.grammar-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
}

.grammar-card {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.grammar-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.grammar-ch-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.grammar-tense-name {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 0.2rem;
}

.formula-tag {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 0.35rem 0.7rem;
  border-radius: var(--radius-sm);
  background: rgba(20, 184, 166, 0.15);
  border: 1px solid rgba(20, 184, 166, 0.3);
  color: var(--teal-light);
}

.grammar-uses-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.grammar-uses-list li::before {
  content: "•";
  color: var(--gold-primary);
  font-weight: bold;
  display: inline-block;
  width: 1em;
}

.grammar-story-quote {
  background: rgba(0, 0, 0, 0.3);
  border-left: 2px solid var(--gold-primary);
  padding: 0.75rem 1rem;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 0.92rem;
  color: var(--text-gold);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

/* Irregular Verbs Table & Search */
.verbs-filter-bar {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.search-input-wrap {
  position: relative;
  flex: 1;
  min-width: 260px;
}

.search-input {
  width: 100%;
  padding: 0.8rem 1rem 0.8rem 2.75rem;
  border-radius: var(--radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  transition: var(--transition);
}

.search-input:focus {
  outline: none;
  border-color: var(--gold-primary);
  box-shadow: 0 0 16px rgba(245, 158, 11, 0.2);
}

.search-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.verbs-table-container {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
}

.verbs-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.verbs-table th {
  padding: 1.1rem 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gold-primary);
  background: rgba(7, 13, 23, 0.6);
  border-bottom: 1px solid var(--border-subtle);
}

.verbs-table td {
  padding: 0.95rem 1.25rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  font-size: 0.92rem;
  transition: var(--transition);
}

.verbs-table tr:hover td {
  background: rgba(245, 158, 11, 0.05);
}

.verbs-table .v-base {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-primary);
}

.verbs-table .v-past, .verbs-table .v-part {
  font-family: var(--font-mono);
  color: var(--teal-light);
}

.verbs-table .v-meaning {
  font-family: var(--font-sans);
  color: var(--text-secondary);
  font-style: italic;
  font-size: 0.85rem;
}

/* Vocabulary Cards & Filter */
.vocab-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}

.vocab-card {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 0.75rem;
}

.vocab-word {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
}

.vocab-type-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
  background: rgba(245, 158, 11, 0.12);
  color: var(--gold-primary);
  width: fit-content;
}

.vocab-def {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* Travel Survival Pack 20-Page Visual Gallery */
.travel-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.travel-card {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.travel-img-preview {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  cursor: pointer;
  transition: var(--transition);
}

.travel-img-preview:hover {
  transform: scale(1.03);
  border-color: var(--gold-primary);
  box-shadow: var(--gold-glow);
}

.travel-card-info {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.travel-card-title {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 600;
}

/* Founders Section */
.founders-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.founder-card {
  text-align: center;
  padding: 2.5rem 2rem;
}

.founder-avatar-wrap {
  position: relative;
  width: 150px;
  height: 150px;
  margin: 0 auto 1.5rem;
}

.founder-avatar {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--gold-primary);
  box-shadow: 0 0 25px rgba(245, 158, 11, 0.35);
}

.founder-name {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
}

.founder-role {
  font-size: 0.85rem;
  color: var(--gold-primary);
  margin-top: 0.25rem;
  margin-bottom: 1rem;
}

.founder-bio {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Kids Section */
.kids-banner {
  background: radial-gradient(circle at top right, rgba(245, 158, 11, 0.15), rgba(20, 184, 166, 0.08) 50%, transparent 100%);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(245, 158, 11, 0.2);
  padding: 3rem 2rem;
  margin-bottom: 3rem;
}

.kids-packages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.kids-package-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 2rem;
}

.package-price {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--gold-primary);
  margin: 1rem 0;
}

.package-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-bottom: 1.5rem;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.package-features li::before {
  content: "✓";
  color: var(--teal-light);
  font-weight: bold;
  margin-right: 0.5rem;
}

/* Testimonials Carousel / Grid */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.testimonial-card {
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.stars-row {
  color: var(--gold-primary);
  font-size: 1rem;
  margin-bottom: 1rem;
  letter-spacing: 0.2em;
}

.testimonial-quote {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.testimonial-author {
  font-weight: 700;
  font-size: 0.95rem;
}

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

/* Purchase & Download Callout */
.buy-box {
  max-width: 540px;
  margin: 0 auto;
  padding: 2.5rem;
  text-align: center;
  border: 1px solid var(--border-glow);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), var(--gold-glow);
}

.buy-box-price {
  font-family: var(--font-serif);
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--gold-primary);
  margin: 1rem 0 0.5rem;
}

.buy-links-group {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-top: 2rem;
}

/* Floating Bottom Bar */
.floating-bottom-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 90;
  background: rgba(7, 13, 23, 0.94);
  backdrop-filter: blur(16px);
  border-top: 1px solid var(--border-glow);
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transform: translateY(100%);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.6);
}

.floating-bottom-bar.visible {
  transform: translateY(0);
}

/* Lightbox Modal */
.lightbox-modal {
  position: fixed;
  inset: 0;
  z-index: 300;
  background: rgba(3, 7, 13, 0.96);
  backdrop-filter: blur(24px);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

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

.lightbox-img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.8);
}

.lightbox-close {
  position: absolute;
  top: 1.5rem;
  right: 2rem;
  font-size: 2rem;
  color: #ffffff;
  cursor: pointer;
  background: none;
  border: none;
}

/* Quick Search Palette (Cmd+K) */
.search-modal {
  position: fixed;
  inset: 0;
  z-index: 250;
  background: rgba(3, 7, 13, 0.85);
  backdrop-filter: blur(16px);
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding-top: 10vh;
}

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

.search-palette {
  width: 100%;
  max-width: 620px;
  background: var(--bg-card-solid);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 25px 70px rgba(0, 0, 0, 0.8);
}

.search-palette-header {
  padding: 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.search-palette-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-size: 1.1rem;
}

.search-results-list {
  max-height: 420px;
  overflow-y: auto;
  list-style: none;
  padding: 0.75rem 0;
}

.search-result-item {
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  transition: var(--transition);
}

.search-result-item:hover, .search-result-item.highlighted {
  background: rgba(245, 158, 11, 0.12);
}

/* Footer */
.site-footer {
  background: #050a12;
  border-top: 1px solid var(--border-subtle);
  padding: 4.5rem 0 2.5rem;
  margin-top: 5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-brand-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-top: 1rem;
  max-width: 320px;
}

.footer-heading {
  font-family: var(--font-display);
  font-size: 0.95rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gold-primary);
  margin-bottom: 1.25rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.88rem;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--gold-light);
  transform: translateX(4px);
  display: inline-block;
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 1rem;
}

/* Responsive Media Queries */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-content {
    align-items: center;
  }
  .hero-meta {
    justify-content: center;
  }
  .hero-cta-group {
    justify-content: center;
  }
  .principles-grid, .kids-packages-grid, .testimonials-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .founders-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}