:root {
  --bg: #050608;
  --panel: rgba(12, 16, 22, 0.82);
  --text: #f5f2e8;
  --muted: #a8afb8;
  --accent: #f2b84b;
  --accent-soft: rgba(242, 184, 75, 0.18);
  --line: rgba(255, 255, 255, 0.12);
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.55);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at 50% 42%, rgba(25, 47, 70, 0.20), transparent 35%),
    radial-gradient(circle at 20% 80%, rgba(242, 184, 75, 0.08), transparent 30%),
    linear-gradient(180deg, #080b10 0%, var(--bg) 62%);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.18;
  background-image:
    linear-gradient(rgba(255,255,255,0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.018) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(to bottom, black, transparent 84%);
}

a { color: inherit; }

.site-shell {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.hero {
  min-height: 100vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 48px 0;
}

.hero-card {
  width: min(760px, 100%);
  padding: clamp(28px, 6vw, 72px);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(14,18,24,0.86), rgba(6,8,12,0.82));
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
  position: relative;
  overflow: hidden;
}

.hero-card::after {
  content: "";
  position: absolute;
  inset: auto 12% 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.65;
}

.eyebrow {
  margin: 0 0 18px;
  text-transform: uppercase;
  letter-spacing: 0.32em;
  font-size: 0.72rem;
  color: var(--muted);
}

.brand {
  margin: 0;
  font-size: clamp(2.1rem, 8vw, 5rem);
  line-height: 0.95;
  letter-spacing: -0.045em;
  text-transform: uppercase;
}

.count-label {
  margin: clamp(46px, 8vw, 76px) 0 8px;
  color: var(--muted);
  letter-spacing: 0.26em;
  text-transform: uppercase;
  font-size: 0.78rem;
}

.count {
  margin: 0;
  font-variant-numeric: tabular-nums;
  font-size: clamp(3.5rem, 13vw, 7.6rem);
  font-weight: 800;
  letter-spacing: -0.055em;
  color: var(--accent);
  text-shadow: 0 0 32px rgba(242, 184, 75, 0.17);
}

.hero-copy {
  width: min(560px, 100%);
  margin: 26px auto 0;
  line-height: 1.65;
  color: var(--muted);
  font-size: clamp(0.98rem, 2vw, 1.08rem);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 34px;
}

.btn {
  appearance: none;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #12100b;
  min-height: 48px;
  padding: 13px 24px;
  font: inherit;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  text-decoration: none;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(242, 184, 75, 0.18);
}

.btn.secondary {
  color: var(--text);
  background: transparent;
  border-color: var(--line);
}

.observer-result {
  display: none;
  margin-top: 28px;
  padding: 20px;
  border: 1px solid var(--line);
  background: var(--accent-soft);
}

.observer-result.show { display: block; }

.observer-number {
  color: var(--accent);
  font-size: 1.35rem;
  font-weight: 800;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: rgba(5, 6, 8, 0.82);
  backdrop-filter: blur(12px);
}

.nav {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.nav-brand {
  font-weight: 900;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 18px;
  font-size: 0.9rem;
  color: var(--muted);
}

.nav-links a { text-decoration: none; }
.nav-links a:hover { color: var(--text); }

.page {
  padding: 64px 0 96px;
}

.page h1 {
  font-size: clamp(2.4rem, 7vw, 5rem);
  line-height: 0.98;
  letter-spacing: -0.045em;
  margin: 0 0 22px;
}

.lead {
  max-width: 760px;
  color: var(--muted);
  font-size: 1.12rem;
  line-height: 1.7;
}

.video-wrap {
  margin-top: 36px;
  aspect-ratio: 16/9;
  border: 1px solid var(--line);
  background: #000;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.video-placeholder {
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 32px;
  color: var(--muted);
  background:
    radial-gradient(circle at center, rgba(242, 184, 75, 0.10), transparent 36%),
    #050608;
}

.section-title {
  margin-top: 72px;
  margin-bottom: 20px;
  font-size: clamp(1.8rem, 5vw, 3rem);
}

.book-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 30px;
}

.book-card {
  padding: 28px;
  border: 1px solid var(--line);
  background: var(--panel);
}

.book-card .kicker {
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.7rem;
}

.book-card h2 {
  margin: 11px 0 8px;
  font-size: 1.55rem;
}

.book-card p {
  color: var(--muted);
  line-height: 1.6;
  min-height: 76px;
}

.book-card a {
  display: inline-block;
  margin-top: 8px;
  color: var(--accent);
  font-weight: 800;
  text-decoration: none;
}

.footer {
  padding: 30px 0 56px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  text-align: center;
  font-size: 0.88rem;
}

@media (max-width: 720px) {
  .book-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .hero-card { padding-inline: 22px; }
}