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

:root {
  --bg-deep: #060b18;
  --bg-mid: #0a1628;
  --bg-card: rgba(13, 31, 60, 0.7);
  --bg-card-border: rgba(0, 212, 255, 0.08);
  --cyan: #00d4ff;
  --cyan-dim: #0088aa;
  --cyan-glow: rgba(0, 212, 255, 0.15);
  --purple: #9b6dff;
  --text: #c0cfe0;
  --text-bright: #e8f0f8;
  --text-dim: #5a7090;
  --text-mid: #8899b0;
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: 'Inter', 'Segoe UI', -apple-system, 'Helvetica Neue', sans-serif;
  background: var(--bg-deep);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
}

/* ---- Starfield ---- */
.starfield {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(1px 1px at 10% 20%, rgba(255,255,255,0.35), transparent),
    radial-gradient(1px 1px at 30% 60%, rgba(255,255,255,0.25), transparent),
    radial-gradient(1.2px 1.2px at 50% 10%, rgba(255,255,255,0.4), transparent),
    radial-gradient(1px 1px at 70% 80%, rgba(255,255,255,0.25), transparent),
    radial-gradient(1px 1px at 90% 40%, rgba(255,255,255,0.3), transparent),
    radial-gradient(1.5px 1.5px at 15% 75%, rgba(0,212,255,0.25), transparent),
    radial-gradient(1.5px 1.5px at 85% 15%, rgba(155,109,255,0.2), transparent),
    radial-gradient(1px 1px at 25% 45%, rgba(255,255,255,0.2), transparent),
    radial-gradient(1px 1px at 60% 35%, rgba(255,255,255,0.3), transparent),
    radial-gradient(1px 1px at 45% 90%, rgba(255,255,255,0.2), transparent),
    radial-gradient(1px 1px at 80% 55%, rgba(255,255,255,0.25), transparent),
    radial-gradient(1px 1px at 5% 50%, rgba(255,255,255,0.2), transparent),
    radial-gradient(1px 1px at 95% 70%, rgba(255,255,255,0.3), transparent),
    radial-gradient(1px 1px at 40% 5%, rgba(255,255,255,0.25), transparent);
  pointer-events: none;
  z-index: 0;
}

.page { position: relative; z-index: 1; }

/* ---- Hero ---- */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 2rem 1.5rem 0;
}

.hero-banner-wrap {
  width: min(900px, 100vw);
  margin-bottom: -2rem;
  margin-top: -3rem;
  position: relative;
  -webkit-mask-image:
    linear-gradient(to right, transparent, black 15%, black 85%, transparent),
    linear-gradient(to bottom, transparent, black 20%, black 65%, transparent);
  -webkit-mask-composite: destination-in;
  mask-image:
    linear-gradient(to right, transparent, black 15%, black 85%, transparent),
    linear-gradient(to bottom, transparent, black 20%, black 65%, transparent);
  mask-composite: intersect;
}

.hero-banner {
  width: 100%;
  display: block;
  filter: drop-shadow(0 0 40px rgba(0, 212, 255, 0.1));
}

.hero-tagline {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  font-weight: 400;
  font-style: italic;
  color: var(--text-mid);
  max-width: 540px;
  margin-bottom: 2.5rem;
}

/* ---- Book section ---- */
.book-section {
  display: flex;
  gap: 3rem;
  align-items: flex-start;
  max-width: 920px;
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
}

.book-cover-wrap {
  flex-shrink: 0;
  width: 300px;
}

.book-cover {
  width: 100%;
  border-radius: 4px;
  box-shadow:
    0 0 50px rgba(0, 212, 255, 0.08),
    0 15px 50px rgba(0, 0, 0, 0.5);
}

.book-info {
  flex: 1;
  min-width: 0;
}

.book-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-bright);
  margin-bottom: 0.25rem;
  line-height: 1.3;
}

.book-series {
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 0.5rem;
}

.book-authors {
  font-size: 0.95rem;
  color: var(--text-dim);
  margin-bottom: 1.5rem;
}

.book-authors strong {
  color: var(--text);
  font-weight: 600;
}

.blurb p {
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--text);
  margin-bottom: 1rem;
}

.blurb p:last-child { margin-bottom: 0; }

.blurb .hook {
  font-style: italic;
  color: var(--text-bright);
  font-size: 1rem;
}

.blurb .kicker {
  font-weight: 600;
  color: var(--text-bright);
  font-style: italic;
}

.book-cta {
  margin-top: 1.75rem;
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
}

.cta-btn {
  display: inline-block;
  padding: 0.8rem 2rem;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--bg-deep);
  background: linear-gradient(135deg, var(--cyan), #33ddff);
  border-radius: 4px;
  transition: all 0.25s ease;
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
}

.cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(0, 212, 255, 0.35);
  background: linear-gradient(135deg, #33ddff, #66e8ff);
}

.cta-sub {
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* ---- Divider ---- */
.divider {
  width: 100%;
  max-width: 920px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan-dim), transparent);
  margin: 0 auto;
  opacity: 0.3;
}

/* ---- Universe section ---- */
.universe {
  max-width: 920px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

.universe-header {
  text-align: center;
  margin-bottom: 2rem;
}

.universe-header h2 {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 0.75rem;
}

.universe-header p {
  font-size: 1.05rem;
  color: var(--text);
  max-width: 620px;
  margin: 0 auto;
  line-height: 1.75;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: 6px;
  padding: 1.5rem;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
  backdrop-filter: blur(4px);
}

.card:hover {
  border-color: rgba(0, 212, 255, 0.18);
  box-shadow: 0 0 25px rgba(0, 212, 255, 0.05);
}

.card h3 {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 0.6rem;
}

.card p {
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--text-dim);
}

/* ---- Premise quote ---- */
.premise-quote {
  max-width: 640px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 3rem;
  text-align: center;
}

.premise-quote blockquote {
  font-size: 1.15rem;
  font-style: italic;
  line-height: 1.8;
  color: var(--text);
  border: none;
  position: relative;
}

.premise-quote blockquote::before {
  content: '';
  display: block;
  width: 40px;
  height: 2px;
  background: var(--cyan-dim);
  margin: 0 auto 1.5rem;
  opacity: 0.5;
}

.premise-quote .accent {
  color: var(--text-bright);
  font-weight: 500;
}

/* ---- Bottom CTA ---- */
.bottom-cta {
  text-align: center;
  padding: 0 1.5rem 3rem;
}

.bottom-cta p {
  font-size: 0.95rem;
  color: var(--text-mid);
  margin-bottom: 1.25rem;
}

/* ---- Footer ---- */
footer {
  text-align: center;
  padding: 2.5rem 1.5rem;
  border-top: 1px solid rgba(255,255,255,0.04);
}

footer p {
  font-size: 0.78rem;
  color: var(--text-dim);
  letter-spacing: 0.04em;
}

footer a {
  color: var(--cyan-dim);
  text-decoration: none;
}

footer a:hover { color: var(--cyan); }

/* ---- Responsive ---- */
@media (max-width: 720px) {
  .book-section {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 2rem;
  }
  .book-cover-wrap { width: min(300px, 75vw); }
  .book-info { text-align: center; }
  .book-cta { justify-content: center; }
  .cards { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .book-cover-wrap { width: 85vw; }
  .hero-banner { margin-bottom: 0.5rem; }
}