/* ===========================
   DESIGN TOKENS — Book Cover Palette
   Dark chocolate, rich gold, cream
=========================== */
:root, [data-theme="light"] {
  --color-bg: #F5F0E8;
  --color-surface: #FAF7F2;
  --color-surface-2: #FFFFFF;
  --color-border: #DDD5C0;
  --color-divider: #E8E0CC;
  --color-text: #1A1500;
  --color-text-muted: #5C5030;
  --color-text-faint: #A89870;
  --color-text-inverse: #FAF7F2;
  --color-primary: #8B6914;
  --color-primary-hover: #6F5210;
  --color-primary-light: #F0E6CC;
  --color-gold: #C8A84B;
  --color-gold-light: #EDD98A;
  --color-dark: #1A1500;
  --color-dark-2: #2D2200;

  --font-display: 'Boska', 'Georgia', serif;
  --font-body: 'Satoshi', 'Helvetica Neue', sans-serif;

  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-hero: clamp(3rem, 1rem + 6vw, 7rem);

  --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem;
  --space-4: 1rem; --space-5: 1.25rem; --space-6: 1.5rem;
  --space-8: 2rem; --space-10: 2.5rem; --space-12: 3rem;
  --space-16: 4rem; --space-20: 5rem; --space-24: 6rem;

  --radius-sm: 4px; --radius-md: 8px;
  --radius-lg: 16px; --radius-xl: 24px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 3px rgba(26,21,0,0.08);
  --shadow-md: 0 4px 20px rgba(26,21,0,0.10);
  --shadow-lg: 0 16px 48px rgba(26,21,0,0.16);

  --content-default: 1100px;
  --transition: 180ms cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="dark"] {
  --color-bg: #120F00;
  --color-surface: #1A1500;
  --color-surface-2: #221C00;
  --color-border: #3A3010;
  --color-divider: #2A2200;
  --color-text: #F0E8CC;
  --color-text-muted: #A89060;
  --color-text-faint: #6A5830;
  --color-text-inverse: #120F00;
  --color-primary: #D4A843;
  --color-primary-hover: #E8C060;
  --color-primary-light: #2A2000;
  --color-gold: #D4A843;
  --color-gold-light: #3A2E00;
  --color-dark: #F0E8CC;
  --color-dark-2: #D4C8A0;
}

/* ===========================
   BASE
=========================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.65;
  transition: background var(--transition), color var(--transition);
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.1; text-wrap: balance; }
p { text-wrap: pretty; }
ul { list-style: none; }

.container { max-width: var(--content-default); margin: 0 auto; padding: 0 var(--space-6); }
.section { padding: clamp(var(--space-16), 8vw, var(--space-24)) 0; }

.eyebrow {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}
.lead {
  font-size: var(--text-lg);
  font-weight: 400;
  line-height: 1.5;
  margin-bottom: var(--space-5);
}

/* ===========================
   BUTTONS
=========================== */
.btn {
  display: inline-flex; align-items: center; gap: var(--space-2);
  font-family: var(--font-body); font-size: var(--text-sm); font-weight: 700;
  padding: 0.7em 1.6em; border-radius: var(--radius-sm);
  cursor: pointer; border: 2px solid transparent;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn-primary { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.btn-primary:hover { background: var(--color-primary-hover); border-color: var(--color-primary-hover); }
.btn-ghost { background: transparent; color: rgba(255,255,255,0.9); border-color: rgba(255,255,255,0.4); }
.btn-ghost:hover { background: rgba(255,255,255,0.12); }
.btn-lg { padding: 0.9em 2em; font-size: var(--text-base); }
.btn-full { width: 100%; justify-content: center; }

/* ===========================
   HEADER
=========================== */
.header {
  position: sticky; top: 0; z-index: 100;
  background: oklch(from var(--color-bg) l c h / 0.94);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-divider);
  transition: box-shadow var(--transition);
}
.header-inner {
  max-width: var(--content-default); margin: 0 auto;
  padding: 0 var(--space-6); height: 72px;
  display: flex; align-items: center; gap: var(--space-5);
}
.logo { display: flex; align-items: center; gap: var(--space-3); flex-shrink: 0; }
.logo-img { width: 44px; height: 44px; border-radius: 50%; object-fit: cover; }
.logo-text {
  font-family: var(--font-display); font-size: var(--text-base);
  font-weight: 700; color: var(--color-text);
}
.nav { display: flex; align-items: center; gap: var(--space-6); margin-left: auto; }
.nav a {
  font-size: var(--text-sm); font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition);
}
.nav a:hover { color: var(--color-primary); }
.header-actions { display: flex; align-items: center; gap: var(--space-3); margin-left: var(--space-4); }
.theme-toggle {
  width: 36px; height: 36px; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-text-muted); background: transparent;
  border: 1px solid var(--color-border); cursor: pointer;
  transition: color var(--transition), background var(--transition);
}
.theme-toggle:hover { color: var(--color-primary); background: var(--color-primary-light); }
.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  padding: 8px; background: none; border: none; cursor: pointer; margin-left: auto;
}
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--color-text); }

/* ===========================
   HERO
=========================== */
.hero {
  min-height: 90vh;
  background: linear-gradient(135deg, #1A1500 0%, #2D2200 50%, #1A1200 100%);
  color: #F5ECD8;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: var(--space-12);
  padding: var(--space-20) clamp(var(--space-6), 6vw, var(--space-16));
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 70% 50%, rgba(200,168,75,0.08) 0%, transparent 70%);
  pointer-events: none;
}
.hero-bg-text {
  position: absolute; bottom: -0.1em; right: -0.05em;
  font-family: var(--font-display);
  font-size: clamp(8rem, 20vw, 22rem);
  font-weight: 700;
  color: rgba(200,168,75,0.05);
  line-height: 1; pointer-events: none; user-select: none;
  letter-spacing: -0.02em;
}
.hero-content { max-width: 580px; z-index: 1; }
.hero-content .eyebrow { color: var(--color-gold-light); }
.hero-title {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  font-weight: 700; line-height: 1.0;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-6); color: #fff;
}
.hero-title em { font-style: italic; color: var(--color-gold); }
.hero-sub { font-size: var(--text-lg); color: rgba(245,236,216,0.7); line-height: 1.5; margin-bottom: var(--space-8); max-width: 50ch; }
.hero-ctas { display: flex; gap: var(--space-4); flex-wrap: wrap; }
.hero-book-visual { display: flex; justify-content: center; align-items: center; z-index: 1; }
.book-cover-img {
  width: 100%; max-width: 480px;
  border-radius: var(--radius-md);
  box-shadow: -20px 20px 60px rgba(0,0,0,0.6), 0 0 0 1px rgba(200,168,75,0.2);
  transform: perspective(900px) rotateY(-8deg) rotateX(2deg);
}

/* ===========================
   QUOTE BANNER
=========================== */
.quote-banner {
  background: var(--color-primary);
  padding: var(--space-12) 0;
}
.quote-banner blockquote {
  text-align: center; max-width: 820px; margin: 0 auto;
}
.quote-banner p {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-style: italic;
  color: #fff;
  line-height: 1.4;
  margin-bottom: var(--space-4);
}
.quote-banner cite {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-style: normal;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.65);
}

/* ===========================
   ABOUT
=========================== */
.about { background: var(--color-surface); }
.about-grid {
  display: grid;
  grid-template-columns: 400px 1fr;
  gap: var(--space-16); align-items: center;
}
.author-photo {
  width: 100%; border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  object-fit: cover; aspect-ratio: 3/4;
}
.about-text-col h2 { font-size: var(--text-2xl); margin-bottom: var(--space-4); }
.about-text-col p { color: var(--color-text-muted); margin-bottom: var(--space-4); max-width: 60ch; }
.about-stats {
  display: flex; gap: var(--space-8);
  margin-top: var(--space-8); padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
}
.stat-num { display: block; font-family: var(--font-display); font-size: var(--text-2xl); font-weight: 700; color: var(--color-primary); line-height: 1; }
.stat-label { font-size: var(--text-xs); color: var(--color-text-muted); margin-top: var(--space-1); }

/* ===========================
   BOOK SECTION
=========================== */
.book-section { background: var(--color-bg); }
.section-header { text-align: center; margin-bottom: var(--space-12); }
.section-header h2 { font-size: var(--text-2xl); margin-bottom: var(--space-4); }
.section-sub { font-size: var(--text-lg); color: var(--color-text-muted); max-width: 56ch; margin: 0 auto; }

.book-showcase {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: var(--space-12); align-items: start;
}
.book-showcase-img { position: sticky; top: 90px; }
.book-full-cover {
  width: 100%; border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.format-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  margin-bottom: var(--space-6);
}
.format-badge {
  display: inline-block; font-size: var(--text-xs); font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase;
  padding: 5px 14px; border-radius: var(--radius-full);
  background: var(--color-primary); color: #fff;
  margin-bottom: var(--space-5);
}
.format-card h3 { font-size: var(--text-xl); margin-bottom: var(--space-2); }
.book-subtitle { font-style: italic; color: var(--color-text-muted); margin-bottom: var(--space-4); font-size: var(--text-sm); }
.format-card p { color: var(--color-text-muted); margin-bottom: var(--space-5); }
.format-price { display: flex; align-items: baseline; gap: var(--space-2); margin-bottom: var(--space-5); }
.price { font-family: var(--font-display); font-size: var(--text-2xl); font-weight: 700; color: var(--color-primary); }
.price-note { font-size: var(--text-sm); color: var(--color-text-muted); }
.format-note { font-size: var(--text-xs); color: var(--color-text-faint); margin-top: var(--space-3); text-align: center; }

.acronym-block {
  background: var(--color-dark);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
}
[data-theme="dark"] .acronym-block { background: var(--color-surface-2); }
.acronym-block h4 {
  font-family: var(--font-display); font-size: var(--text-lg);
  color: var(--color-gold); margin-bottom: var(--space-6);
  text-align: center;
}
.acronym-list { display: flex; flex-direction: column; gap: var(--space-4); }
.acronym-item { display: flex; align-items: flex-start; gap: var(--space-4); }
.letter {
  font-family: var(--font-display); font-size: var(--text-xl);
  font-weight: 700; color: var(--color-gold);
  line-height: 1; flex-shrink: 0; width: 32px;
}
.acronym-item strong { display: block; font-size: var(--text-sm); color: #F5ECD8; margin-bottom: 2px; }
.acronym-item p { font-size: var(--text-xs); color: rgba(245,236,216,0.55); }

/* ===========================
   GOLD EDITION TEASER
=========================== */
.gold-teaser { background: var(--color-surface); }

.gold-teaser-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.gold-cover-img {
  width: 100%;
  max-width: 420px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  margin: 0 auto;
}

.gold-teaser-text h2 {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-2);
}

.gold-tag {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-5);
}

.gold-teaser-text p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
}

.gold-pillars {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.gold-pillars span {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 5px 14px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
}

.gold-quote {
  background: var(--color-dark);
  border-left: 3px solid var(--color-gold);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: var(--space-5) var(--space-6);
  margin-bottom: var(--space-6);
}

.gold-quote p {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-style: italic;
  color: rgba(245,236,216,0.9) !important;
  margin-bottom: var(--space-2) !important;
}

.gold-quote cite {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-gold) !important;
}

.btn-gold {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
  font-weight: 700;
}
.btn-gold:hover {
  background: var(--color-primary);
  color: #fff;
}

/* ===========================
   COUPLE SECTION
=========================== */
.couple-section {
  background: linear-gradient(135deg, #1A1500 0%, #2D2200 100%);
  color: #F5ECD8;
}
.couple-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: var(--space-16); align-items: center;
}
.couple-img {
  width: 100%; border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  object-fit: cover; aspect-ratio: 3/4;
  max-height: 600px;
}
.couple-section .eyebrow { color: var(--color-gold); }
.couple-section h2 { font-size: var(--text-2xl); color: #fff; margin-bottom: var(--space-5); }
.couple-section .lead { color: rgba(245,236,216,0.85); }
.couple-section p { color: rgba(245,236,216,0.65); margin-bottom: var(--space-5); }

/* ===========================
   CONTACT
=========================== */
.contact-section { background: var(--color-surface); }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-16); align-items: start; }
.contact-text h2 { font-size: var(--text-2xl); margin-bottom: var(--space-5); }
.contact-text > p { color: var(--color-text-muted); margin-bottom: var(--space-8); }
.contact-info { display: flex; flex-direction: column; gap: var(--space-4); margin-bottom: var(--space-8); }
.contact-item { display: flex; align-items: center; gap: var(--space-3); font-size: var(--text-sm); color: var(--color-text-muted); }
.contact-item a { color: var(--color-primary); }
.contact-item a:hover { text-decoration: underline; }
.contact-item svg { color: var(--color-primary); flex-shrink: 0; }

.social-row { display: flex; flex-direction: column; gap: var(--space-3); margin-bottom: var(--space-8); }
.social-btn {
  display: inline-flex; align-items: center; gap: var(--space-3);
  font-size: var(--text-sm); font-weight: 600;
  padding: 0.7em 1.2em;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  transition: color var(--transition), background var(--transition), border-color var(--transition);
  width: fit-content;
}
.social-btn:hover { color: var(--color-primary); background: var(--color-primary-light); border-color: var(--color-primary); }

.qr-block { display: flex; flex-direction: column; align-items: flex-start; gap: var(--space-2); }
.qr-img { width: 120px; height: 120px; object-fit: cover; border-radius: var(--radius-md); border: 1px solid var(--color-border); }
.qr-block p { font-size: var(--text-xs); color: var(--color-text-faint); }

.contact-form {
  background: var(--color-surface-2); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: var(--space-8);
  display: flex; flex-direction: column; gap: var(--space-5);
}
.form-group { display: flex; flex-direction: column; gap: var(--space-2); }
.form-group label { font-size: var(--text-sm); font-weight: 600; color: var(--color-text); }
.form-group input, .form-group select, .form-group textarea {
  font-family: var(--font-body); font-size: var(--text-sm);
  padding: 0.7em 1em;
  border: 1px solid var(--color-border); border-radius: var(--radius-sm);
  background: var(--color-bg); color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none; border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}
.form-group textarea { resize: vertical; min-height: 130px; }
.form-success {
  background: #d4edda; color: #155724;
  padding: var(--space-4); border-radius: var(--radius-sm);
  font-size: var(--text-sm); font-weight: 500; text-align: center;
}

/* ===========================
   FOOTER
=========================== */
.footer { background: var(--color-dark); padding: var(--space-8) 0; }
[data-theme="dark"] .footer { background: #0A0800; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: var(--space-4); }
.footer-brand { display: flex; align-items: center; gap: var(--space-3); }
.footer-logo { width: 40px; height: 40px; border-radius: 50%; object-fit: cover; }
.footer-name { font-family: var(--font-display); font-size: var(--text-base); font-weight: 700; color: var(--color-gold); }
.footer-tag { font-size: var(--text-xs); color: rgba(245,236,216,0.45); margin-top: 2px; }
.footer-copy { font-size: var(--text-xs); color: rgba(245,236,216,0.35); }

/* ===========================
   RESPONSIVE
=========================== */
@media (max-width: 960px) {
  .hero { grid-template-columns: 1fr; min-height: auto; padding: var(--space-16) var(--space-6); text-align: center; }
  .hero-ctas { justify-content: center; }
  .hero-book-visual { max-width: 400px; margin: 0 auto; }
  .book-cover-img { transform: none; }

  .about-grid { grid-template-columns: 1fr; }
  .author-photo { max-width: 320px; margin: 0 auto; aspect-ratio: 1; }

  .book-showcase { grid-template-columns: 1fr; }
  .book-showcase-img { position: static; max-width: 500px; margin: 0 auto; }

  .gold-teaser-grid { grid-template-columns: 1fr; }
  .gold-cover-img { max-width: 320px; }
  .couple-grid { grid-template-columns: 1fr; }
  .couple-img { max-width: 380px; margin: 0 auto; aspect-ratio: 3/4; }

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

  .nav { display: none; }
  .header-actions .btn { display: none; }
  .nav-toggle { display: flex; }
  .nav.open {
    display: flex; flex-direction: column;
    position: absolute; top: 72px; left: 0; right: 0;
    background: var(--color-surface); border-bottom: 1px solid var(--color-border);
    padding: var(--space-5) var(--space-6); gap: var(--space-5); z-index: 99;
  }
  .about-stats { flex-wrap: wrap; gap: var(--space-6); }
  .footer-inner { flex-direction: column; text-align: center; }
}

@media (max-width: 500px) {
  .hero-ctas { flex-direction: column; }
  .btn-lg { width: 100%; justify-content: center; }
}