:root {
  --navy: #1a0f6e;
  --navy-dark: #120b52;
  --gold: #e8c97a;
  --gold-light: #f5dfa0;
  --white: #ffffff;
  --off-white: #f8f6f0;
  --text-dark: #1a1a2e;
  --text-muted: #555;
  --accent: #4a90d9;
  --card-shadow: 0 4px 20px rgba(0,0,0,0.15);
  --radius: 8px;
}

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

body {
  font-family: 'Georgia', 'Times New Roman', serif;
  color: var(--text-dark);
  background: var(--off-white);
  line-height: 1.7;
}

/* NAV */
nav {
  position: sticky;
  top: 0;
  background: var(--navy);
  z-index: 100;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.4);
}
nav .logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}
nav .logo img {
  height: 48px;
  width: auto;
  object-fit: contain;
}
nav ul {
  list-style: none;
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}
nav ul a {
  display: inline-block;
  background: var(--gold-light);
  color: var(--navy-dark);
  text-decoration: none;
  font-size: 0.68rem;
  font-family: 'Helvetica Neue', sans-serif;
  font-weight: 700;
  letter-spacing: 0.02em;
  padding: 0.22rem 0.6rem;
  border-radius: 20px;
  white-space: nowrap;
  transition: background 0.2s, transform 0.15s;
}
nav ul a:hover {
  background: #f5dfa0;
  transform: translateY(-1px);
}

/* HERO */
.hero {
  background: var(--navy);
  color: var(--white);
  padding: 5rem 2rem 4rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 70% 50%, rgba(201,168,76,0.08) 0%, transparent 70%);
}
.hero h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  color: var(--gold);
  letter-spacing: 0.04em;
  margin-bottom: 0.5rem;
  position: relative;
}
.hero .tagline {
  font-size: 1.15rem;
  color: rgba(255,255,255,0.75);
  font-style: italic;
  margin-bottom: 2rem;
  position: relative;
}
.hero .cta-btn {
  display: inline-block;
  background: var(--gold);
  color: var(--navy-dark);
  padding: 0.9rem 2.2rem;
  border-radius: 40px;
  font-family: 'Helvetica Neue', sans-serif;
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  transition: background 0.2s, transform 0.2s;
  position: relative;
  letter-spacing: 0.03em;
}
.hero .cta-btn:hover { background: var(--gold-light); transform: translateY(-2px); }

/* ABOUT */
.about {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 3rem;
  max-width: 900px;
  margin: 0 auto;
  padding: 4rem 2rem;
  align-items: start;
}
.about h2 {
  font-size: 2rem;
  color: var(--navy);
  margin-bottom: 1rem;
}
.about p { color: var(--text-muted); margin-bottom: 0.8rem; }
.about img {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
  object-fit: cover;
  aspect-ratio: 3/4;
  order: 2;
}

/* SECTION CONTAINER */
.section {
  padding: 3.5rem 2rem;
  max-width: 1100px;
  margin: 0 auto;
}
.section-alt { background: var(--white); padding: 3.5rem 0; }
.section-alt .section { padding-top: 0; padding-bottom: 0; }

.section h2 {
  font-size: 1.9rem;
  color: var(--navy);
  margin-bottom: 0.5rem;
}
.section .series-desc {
  color: var(--text-muted);
  max-width: 720px;
  margin-bottom: 2rem;
  font-size: 0.95rem;
}

/* BOOK GRID */
.book-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}
.book-card {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  transition: transform 0.2s;
}
.book-card:hover { transform: translateY(-4px); }
.book-card img {
  width: 100%;
  border-radius: 4px;
  box-shadow: var(--card-shadow);
  aspect-ratio: 2/3;
  object-fit: cover;
  background: #ddd;
}
.book-card .book-num {
  font-size: 0.7rem;
  font-family: 'Helvetica Neue', sans-serif;
  color: var(--gold);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 0.6rem;
}
.book-card .book-title {
  font-size: 0.82rem;
  font-weight: bold;
  color: var(--text-dark);
  line-height: 1.3;
}

/* BOX SETS */
.boxset-row {
  display: flex;
  gap: 1.2rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}
.boxset-label {
  font-size: 0.65rem;
  color: var(--accent);
  font-family: 'Helvetica Neue', sans-serif;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.06em;
  margin-top: 0.5rem;
}

/* AMAZON BANNER */
.amazon-banner {
  background: var(--navy);
  color: var(--white);
  text-align: center;
  padding: 4rem 2rem;
}
.amazon-banner h2 { color: var(--gold); margin-bottom: 0.6rem; font-size: 1.8rem; }
.amazon-banner p { color: rgba(255,255,255,0.7); margin-bottom: 1.8rem; max-width: 480px; margin-left: auto; margin-right: auto; }
.amazon-banner a {
  display: inline-block;
  background: var(--gold);
  color: var(--navy-dark);
  padding: 0.85rem 2rem;
  border-radius: 40px;
  font-family: 'Helvetica Neue', sans-serif;
  font-weight: 700;
  text-decoration: none;
  transition: background 0.2s, transform 0.2s;
}
.amazon-banner a:hover { background: var(--gold-light); transform: translateY(-2px); }

/* FOOTER */
footer {
  background: var(--navy-dark);
  color: rgba(255,255,255,0.45);
  text-align: center;
  padding: 2rem;
  font-size: 0.8rem;
  font-family: 'Helvetica Neue', sans-serif;
}
footer a { color: var(--gold); text-decoration: none; }

/* DIVIDER */
.gold-divider {
  width: 60px;
  height: 3px;
  background: var(--gold);
  margin: 0.8rem 0 1.8rem;
}

/* RESPONSIVE */
@media (max-width: 700px) {
  .about { grid-template-columns: 1fr; }
  .about img { max-width: 220px; margin: 0 auto; order: -1; }
  nav ul { display: none; }
  .book-grid { grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); gap: 1rem; }
}