/* ============================================
   THE ORACLE'S ALGORITHM - Main Stylesheet
   ============================================ */

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

:root {
  --gold: #B8974A;
  --gold-light: #D4B06A;
  --white: #FFFFFF;
  --off-white: #FAF9F7;
  --text-dark: #1A1A1A;
  --text-mid: #444444;
  --text-light: #888888;
  --warm-cream: #F5F2ED;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Cormorant Garamond', 'Georgia', serif;
  color: var(--text-dark);
  background: var(--white);
  line-height: 1.7;
  font-size: 18px;
}

/* --- Typography --- */
h1, h2, h3, h4 {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.2;
}

h1 { font-size: clamp(2.2rem, 5vw, 4rem); }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); }
h3 { font-size: clamp(1.3rem, 2.5vw, 1.8rem); }

p { margin-bottom: 1.2em; color: var(--text-mid); }

a { color: var(--gold); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--gold-light); }

/* --- Navigation --- */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(184,151,74,0.2);
  padding: 0 2rem;
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-dark);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-logo span { color: var(--gold); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 0;
  list-style: none;
}

.nav-links > li {
  position: relative;
}

.nav-links > li > a {
  display: block;
  padding: 0.5rem 1.1rem;
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dark);
  font-family: 'Cormorant Garamond', serif;
  font-weight: 600;
  transition: color 0.2s;
}

.nav-links > li > a:hover { color: var(--gold); }

/* Dropdown */
.dropdown { position: relative; }

.dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--white);
  border: 1px solid rgba(184,151,74,0.2);
  border-top: 2px solid var(--gold);
  min-width: 220px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
  z-index: 100;
}

.dropdown:hover .dropdown-menu { display: block; }

.dropdown-menu a {
  display: block;
  padding: 0.7rem 1.2rem;
  font-size: 0.85rem;
  color: var(--text-dark);
  letter-spacing: 0.05em;
  border-bottom: 1px solid rgba(184,151,74,0.1);
  transition: background 0.2s, color 0.2s;
}

.dropdown-menu a:hover {
  background: var(--warm-cream);
  color: var(--gold);
}

/* Mobile menu */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-dark);
  transition: all 0.3s;
}

/* --- Hero Section --- */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  margin-top: 70px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  transition: opacity 1.5s ease-in-out;
}

.hero-bg.active { opacity: 1; }
.hero-bg.inactive { opacity: 0; }

.hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.45);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
  padding: 2rem;
}

.hero-eyebrow {
  font-size: 0.78rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 1.2rem;
  font-family: 'Cormorant Garamond', serif;
}

.hero h1 {
  color: var(--text-dark);
  margin-bottom: 0.5rem;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.3rem);
  color: var(--text-mid);
  margin-bottom: 2rem;
  font-style: italic;
}

.hero-tagline {
  font-size: 0.9rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-mid);
  margin-bottom: 2.5rem;
}

.btn {
  display: inline-block;
  padding: 0.9rem 2.4rem;
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-family: 'Cormorant Garamond', serif;
  font-weight: 600;
  transition: all 0.25s;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--gold);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--gold-light);
  color: var(--white);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--gold);
  border: 1.5px solid var(--gold);
}

.btn-outline:hover {
  background: var(--gold);
  color: var(--white);
}

/* --- Page Header (inner pages) --- */
.page-header {
  background: var(--warm-cream);
  padding: 7rem 2rem 4rem;
  text-align: center;
  border-bottom: 1px solid rgba(184,151,74,0.15);
}

.page-header h1 { color: var(--text-dark); }

.page-header .gold-line {
  width: 50px;
  height: 2px;
  background: var(--gold);
  margin: 1.2rem auto 0;
}

/* --- Sections --- */
section { padding: 5rem 2rem; }

.container {
  max-width: 1100px;
  margin: 0 auto;
}

.container-narrow {
  max-width: 750px;
  margin: 0 auto;
}

.section-eyebrow {
  font-size: 0.75rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 0.8rem;
}

.section-title {
  margin-bottom: 1rem;
  color: var(--text-dark);
}

.gold-divider {
  width: 40px;
  height: 2px;
  background: var(--gold);
  margin: 1.2rem 0 2rem;
}

.gold-divider.center { margin: 1.2rem auto 2rem; }

/* --- Book Grid --- */
.books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 2.5rem;
  margin-top: 3rem;
}

.book-card {
  text-align: center;
  transition: transform 0.25s;
}

.book-card:hover { transform: translateY(-4px); }

.book-card a {
  display: block;
  text-decoration: none;
}

.book-cover-wrap {
  position: relative;
  overflow: hidden;
  border-radius: 3px;
  box-shadow: 0 6px 24px rgba(0,0,0,0.12);
  margin-bottom: 1rem;
  transition: box-shadow 0.25s;
}

.book-card:hover .book-cover-wrap {
  box-shadow: 0 12px 36px rgba(0,0,0,0.18);
}

.book-cover-wrap img {
  width: 100%;
  display: block;
}

.book-card h3 {
  font-size: 0.95rem;
  color: var(--text-dark);
  margin-bottom: 0.3rem;
}

.book-number {
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gold);
}

.amazon-btn {
  display: inline-block;
  margin-top: 0.6rem;
  padding: 0.4rem 1rem;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: var(--gold);
  color: var(--white);
  border-radius: 2px;
  transition: background 0.2s;
}

.amazon-btn:hover { background: var(--gold-light); color: var(--white); }

/* --- Single Book Page --- */
.book-detail {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 4rem;
  align-items: start;
}

.book-detail-cover {
  position: sticky;
  top: 100px;
}

.book-detail-cover img {
  width: 100%;
  border-radius: 4px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.15);
}

/* --- About Section --- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 5rem;
  align-items: center;
}

.author-photo {
  border-radius: 4px;
  width: 100%;
  box-shadow: 0 12px 40px rgba(0,0,0,0.12);
}

/* --- AI Reviews --- */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.review-card {
  background: var(--warm-cream);
  border-left: 3px solid var(--gold);
  padding: 2rem;
}

.review-card blockquote {
  font-style: italic;
  color: var(--text-mid);
  margin-bottom: 1rem;
  line-height: 1.8;
}

.review-source {
  font-size: 0.78rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gold);
  font-weight: 600;
}

/* --- Forms --- */
.form-group {
  margin-bottom: 1.4rem;
}

.form-group label {
  display: block;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-mid);
  margin-bottom: 0.4rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.8rem 1rem;
  border: 1px solid rgba(184,151,74,0.3);
  border-radius: 2px;
  font-family: inherit;
  font-size: 1rem;
  background: var(--white);
  color: var(--text-dark);
  transition: border-color 0.2s;
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--gold);
}

.form-group textarea { min-height: 140px; resize: vertical; }

.form-success {
  display: none;
  background: #f0f7f0;
  border: 1px solid #c3dfc3;
  padding: 1rem 1.4rem;
  border-radius: 2px;
  color: #2d6a2d;
  margin-top: 1rem;
}

/* --- PayPal/Donate --- */
.donate-section {
  background: var(--warm-cream);
  border-radius: 4px;
  padding: 3rem;
  text-align: center;
  border: 1px solid rgba(184,151,74,0.2);
}

.donate-amount-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  margin: 2rem 0;
}

.donate-amount {
  padding: 0.7rem 1.5rem;
  border: 1.5px solid var(--gold);
  background: transparent;
  color: var(--gold);
  font-family: inherit;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.2s;
  border-radius: 2px;
}

.donate-amount:hover, .donate-amount.active {
  background: var(--gold);
  color: var(--white);
}

/* --- Free Reading --- */
.excerpt-card {
  border: 1px solid rgba(184,151,74,0.2);
  border-top: 3px solid var(--gold);
  padding: 2.5rem;
  margin-bottom: 2rem;
  background: var(--white);
}

.excerpt-card h3 {
  color: var(--gold);
  margin-bottom: 0.3rem;
  font-size: 1rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.excerpt-card h4 {
  color: var(--text-dark);
  margin-bottom: 1.2rem;
  font-size: 1.4rem;
}

.excerpt-text {
  font-style: italic;
  color: var(--text-mid);
  line-height: 1.9;
  border-left: 2px solid rgba(184,151,74,0.3);
  padding-left: 1.4rem;
  margin-bottom: 1.2rem;
}

/* --- Canon page --- */
.canon-intro {
  background: var(--warm-cream);
  padding: 4rem;
  border-left: 4px solid var(--gold);
  margin-bottom: 3rem;
}

/* --- Footer --- */
footer {
  background: var(--text-dark);
  color: rgba(255,255,255,0.6);
  padding: 3rem 2rem;
  text-align: center;
}

.footer-inner {
  max-width: 700px;
  margin: 0 auto;
}

.footer-logo {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.1rem;
  color: var(--white);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.footer-logo span { color: var(--gold); }

.footer-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin: 1.5rem 0;
  list-style: none;
}

.footer-links a {
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  transition: color 0.2s;
}

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

.footer-instagram {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--gold);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  margin-bottom: 1.5rem;
  transition: color 0.2s;
}

.footer-instagram:hover { color: var(--gold-light); }

.footer-copy {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.3);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    padding: 1rem 0 2rem;
    border-bottom: 1px solid rgba(184,151,74,0.2);
    gap: 0;
  }

  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }

  .dropdown-menu {
    position: static;
    box-shadow: none;
    border: none;
    border-top: none;
    background: var(--warm-cream);
    display: none;
  }

  .dropdown.open .dropdown-menu { display: block; }

  .about-grid { grid-template-columns: 1fr; gap: 2rem; }
  .book-detail { grid-template-columns: 1fr; }
  .book-detail-cover { position: static; max-width: 240px; margin: 0 auto; }
  .books-grid { grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
  .reviews-grid { grid-template-columns: 1fr; }
  .canon-intro { padding: 2rem; }
  section { padding: 3.5rem 1.5rem; }
}

@media (max-width: 480px) {
  .books-grid { grid-template-columns: repeat(2, 1fr); gap: 1rem; }
}