:root {
  --bg: #07111f;
  --bg-2: #0c1730;
  --panel: rgba(255,255,255,0.05);
  --panel-strong: rgba(255,255,255,0.08);
  --line: rgba(255,255,255,0.10);
  --text: #ecf2ff;
  --muted: #b8c5e2;
  --accent: #7dd3fc;
  --accent-2: #a78bfa;
  --accent-3: #34d399;
  --accent-4: #f59e0b;
  --danger: #fb7185;
  --shadow: 0 24px 64px rgba(0,0,0,0.28);
  --radius: 18px;
  --radius-lg: 28px;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  line-height: 1.6;
  background:
    radial-gradient(circle at top left, rgba(125,211,252,0.10), transparent 26%),
    radial-gradient(circle at top right, rgba(167,139,250,0.14), transparent 30%),
    linear-gradient(180deg, var(--bg) 0%, #09111f 100%);
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
p { margin: 0 0 1rem; }
ul { margin: 0.75rem 0 0; padding-left: 1.15rem; }

.container { width: min(var(--max), calc(100% - 2rem)); margin: 0 auto; }
.narrow { width: min(880px, calc(100% - 2rem)); margin: 0 auto; }
.section { padding: 5.25rem 0; }
.section.alt {
  background: rgba(255,255,255,0.03);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.eyebrow {
  margin-bottom: 0.75rem;
  font-size: 0.82rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 800;
}
.display {
  font-size: clamp(2.9rem, 6vw, 5.25rem);
  line-height: 0.98;
  margin: 0 0 1rem;
}
.page-title {
  font-size: clamp(2.4rem, 4.8vw, 4rem);
  line-height: 1.04;
  margin: 0 0 1rem;
}
.lede, .muted { color: var(--muted); }
.section-head { max-width: 760px; margin-bottom: 2rem; }
.section-head h2 {
  font-size: clamp(1.9rem, 3.2vw, 2.8rem);
  line-height: 1.08;
  margin: 0 0 0.8rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(18px);
  background: rgba(8, 12, 24, 0.76);
  border-bottom: 1px solid var(--line);
}
.nav-wrap {
  min-height: 76px;
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}
.brand-mark { font-weight: 800; letter-spacing: 0.08em; }
.brand-sub { font-size: 0.8rem; color: var(--muted); }
.nav { display: flex; gap: 1.15rem; align-items: center; flex-wrap: wrap; }
.nav a { color: var(--muted); font-weight: 600; }
.nav a:hover, .nav a.active { color: var(--text); }

.hero { padding: 6.8rem 0 4.5rem; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.9fr;
  gap: 2rem;
  align-items: center;
}
.hero-actions, .action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 1.5rem;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 1.1rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
}
.btn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #07111f;
}
.btn.secondary {
  background: rgba(255,255,255,0.04);
  border-color: rgba(255,255,255,0.14);
}
.btn.ghost {
  background: transparent;
  border-color: rgba(255,255,255,0.18);
}

.panel, .card, .book-card, .tier, .callout, .author-card, .pricing-card, .timeline-step, .stat-card, .quote-card, .contact-card {
  background: linear-gradient(180deg, rgba(255,255,255,0.055), rgba(255,255,255,0.025));
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  border-radius: var(--radius);
}
.panel { padding: 1.25rem; }
.card, .book-card, .tier, .author-card, .pricing-card, .timeline-step, .stat-card, .quote-card, .contact-card { padding: 1.35rem; }
.card h3, .book-card h3, .tier h3, .pricing-card h3, .timeline-step h3, .stat-card h3, .contact-card h3 { margin-top: 0; margin-bottom: 0.6rem; }
.card p, .book-card p, .tier p, .pricing-card p, .timeline-step p, .quote-card p, .contact-card p, .author-card p, li { color: var(--muted); }

.stack-diagram { display: grid; gap: 0.82rem; }
.layer {
  padding: 1rem 1rem 1rem 1.12rem;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.08);
  font-weight: 800;
}
.layer span {
  display: block;
  margin-top: 0.2rem;
  font-size: 0.93rem;
  color: rgba(255,255,255,0.8);
  font-weight: 500;
}
.layer.wisdom { background: linear-gradient(90deg, rgba(167,139,250,0.35), rgba(167,139,250,0.1)); }
.layer.experience { background: linear-gradient(90deg, rgba(52,211,153,0.30), rgba(52,211,153,0.10)); }
.layer.knowledge { background: linear-gradient(90deg, rgba(125,211,252,0.32), rgba(125,211,252,0.08)); }
.layer.information { background: linear-gradient(90deg, rgba(96,165,250,0.28), rgba(96,165,250,0.08)); }
.layer.data { background: linear-gradient(90deg, rgba(148,163,184,0.26), rgba(148,163,184,0.08)); }

.grid { display: grid; gap: 1rem; }
.two-up { grid-template-columns: repeat(2, minmax(0,1fr)); }
.three-up { grid-template-columns: repeat(3, minmax(0,1fr)); }
.four-up { grid-template-columns: repeat(4, minmax(0,1fr)); }
.five-up { grid-template-columns: repeat(5, minmax(0,1fr)); }
.book-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 1.2rem; }
.split-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; align-items: start; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  background: rgba(125,211,252,0.12);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 800;
}
.badge.purple { background: rgba(167,139,250,0.14); color: #c8b9ff; }
.badge.green { background: rgba(52,211,153,0.14); color: #7ce9bf; }
.badge.gold { background: rgba(245,158,11,0.14); color: #f9c76d; }

.kpi {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 1rem;
  margin-top: 1.25rem;
}
.kpi .stat-card strong {
  font-size: 1.7rem;
  line-height: 1;
  display: block;
  margin-bottom: 0.35rem;
}

.book-card .book-number, .mini-tag {
  display: inline-block;
  padding: 0.34rem 0.62rem;
  border-radius: 999px;
  background: rgba(125,211,252,0.12);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 800;
  margin-bottom: 0.8rem;
}
.book-card .book-tag { color: var(--text); font-weight: 700; }
.book-cover {
  min-height: 280px;
  padding: 1.4rem;
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border: 1px solid rgba(255,255,255,0.12);
}
.book-cover.book1 { background: linear-gradient(180deg, rgba(125,211,252,0.18), rgba(8,17,31,0.9)); }
.book-cover.book2 { background: linear-gradient(180deg, rgba(167,139,250,0.20), rgba(8,17,31,0.9)); }
.book-cover.book3 { background: linear-gradient(180deg, rgba(52,211,153,0.18), rgba(8,17,31,0.9)); }
.book-cover .cover-series { color: rgba(255,255,255,0.8); font-size: 0.82rem; letter-spacing: 0.14em; text-transform: uppercase; font-weight: 700; }
.book-cover h2 { margin: 0; font-size: 2rem; line-height: 1.05; }
.book-cover p { color: rgba(255,255,255,0.8); margin: 0; }

.price {
  font-size: 2rem;
  line-height: 1;
  font-weight: 800;
  margin: 0.2rem 0 0.65rem;
}
.small { font-size: 0.92rem; color: var(--muted); }
.checklist { list-style: none; padding: 0; margin: 1rem 0 0; }
.checklist li { padding-left: 1.45rem; position: relative; margin-bottom: 0.65rem; }
.checklist li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent-3);
  font-weight: 800;
}

.timeline { display: grid; gap: 1rem; }
.timeline-step { position: relative; }
.timeline-step .step { display: inline-flex; width: 2rem; height: 2rem; border-radius: 999px; align-items: center; justify-content: center; background: rgba(125,211,252,0.12); color: var(--accent); font-weight: 800; margin-bottom: 0.8rem; }

.quote-card blockquote {
  margin: 0;
  font-size: clamp(1.35rem, 3vw, 2.1rem);
  line-height: 1.28;
  font-weight: 800;
}
.quote-card cite {
  display: block;
  margin-top: 0.9rem;
  color: var(--muted);
  font-style: normal;
}

.cta-box {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  align-items: center;
  padding: 1.45rem;
}

.footer {
  border-top: 1px solid var(--line);
  padding: 1.4rem 0 2.1rem;
  color: var(--muted);
}
.footer-wrap {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-mini {
  padding: 4rem 0 2.3rem;
}
.table-like {
  display: grid;
  gap: 0.65rem;
}
.table-row {
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: 1rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.table-row:last-child { border-bottom: 0; }
.table-row strong { color: var(--text); }

@media (max-width: 1100px) {
  .hero-grid, .split-grid, .two-up, .three-up, .four-up, .five-up, .book-grid, .kpi, .cta-box {
    grid-template-columns: 1fr;
    display: grid;
  }
}

@media (max-width: 720px) {
  .nav { display: none; }
  .hero { padding-top: 5rem; }
  .section { padding: 4.1rem 0; }
  .table-row { grid-template-columns: 1fr; gap: 0.35rem; }
}