/* ── BASE ── */
body {
  background: var(--dark);
  color: var(--txt);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
}

/* ── NAV ── */
#nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  padding: 18px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid transparent;
  transition: background var(--dur-mid), border-color var(--dur-mid);
}
#nav.scrolled {
  background: rgba(7,7,13,0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-color: var(--bdr);
}
.nav-logo {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  flex-shrink: 0;
}
.logo-accent { color: var(--gold); }
.nav-links {
  display: flex;
  gap: 28px;
}
.nav-links a {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
  text-transform: uppercase;
  transition: color var(--dur-fast);
}
.nav-links a:hover { color: var(--txt); }

/* ── HERO ── */
#hero {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  padding: 110px 48px 60px;
  gap: 24px;
  position: relative;
  overflow: hidden;
}
#hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  opacity: 0.55;
}
.hero-left  { position: relative; z-index: 2; }
.hero-right {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 560px;
}
#book-canvas { width: 100%; height: 100%; }

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(44px, 5.5vw, 84px);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.03;
  margin-bottom: 26px;
}
.hero-title .line { overflow: hidden; display: block; }
.hero-title .word { display: inline-block; }

.hero-eyebrow {
  font-size: 11px;
  letter-spacing: 0.28em;
  color: var(--gold);
  text-transform: uppercase;
  margin-bottom: 22px;
}
.hero-sub {
  font-size: 16px;
  color: var(--muted);
  line-height: 1.72;
  max-width: 400px;
  margin-bottom: 44px;
}
.hero-sub em { color: var(--emerald); font-style: normal; }

.hero-btns {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.hero-stats {
  display: flex;
  gap: 36px;
  margin-top: 48px;
  flex-wrap: wrap;
}
.stat-num {
  display: block;
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
}
.stat-num .gold { color: var(--gold); }
.stat-label {
  display: block;
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--muted);
  text-transform: uppercase;
  margin-top: 5px;
}

.hero-badge {
  position: absolute;
  top: 24px; right: 16px;
  background: var(--glass);
  border: 1px solid var(--bdr);
  border-radius: var(--r-md);
  padding: 10px 16px;
  backdrop-filter: blur(10px);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 8px;
}
.badge-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--emerald);
  box-shadow: 0 0 7px var(--emerald);
  animation: blink 2s ease-in-out infinite;
}
@keyframes blink {
  0%,100% { opacity: 1; } 50% { opacity: 0.3; }
}

.scroll-hint {
  position: absolute;
  bottom: 30px; left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  z-index: 2;
}
.scroll-hint span { font-size: 10px; letter-spacing: 0.22em; color: var(--muted); text-transform: uppercase; }
.scroll-mouse { width: 22px; height: 36px; border: 1px solid var(--bdr); border-radius: 11px; display: flex; align-items: flex-start; justify-content: center; padding-top: 6px; }
.scroll-wheel { width: 3px; height: 7px; background: var(--gold); border-radius: 2px; animation: wheel 1.6s ease-in-out infinite; }
@keyframes wheel { 0%,100% { transform: translateY(0); opacity: 1; } 60% { transform: translateY(9px); opacity: 0; } }

/* ── SECTIONS ── */
section { padding: var(--sp-3xl) 0; }
#features, #pricing { padding: var(--sp-3xl) var(--sp-xl); }

.section-header { text-align: center; padding: 0 var(--sp-xl); margin-bottom: 64px; }
.section-eyebrow {
  font-size: 11px;
  letter-spacing: 0.28em;
  color: var(--gold);
  text-transform: uppercase;
  margin-bottom: 14px;
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(32px, 4vw, 58px);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.1;
}

/* ── CHAPTERS TRACK ── */
.chapters-track {
  display: flex;
  gap: 22px;
  padding: 8px 48px 20px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  cursor: grab;
}
.chapters-track:active { cursor: grabbing; }
.chapters-track::-webkit-scrollbar { height: 3px; }
.chapters-track::-webkit-scrollbar-track { background: rgba(255,255,255,0.04); }
.chapters-track::-webkit-scrollbar-thumb { background: var(--gold); border-radius: 2px; }

/* ── FEATURES ── */
.features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
  max-width: 1140px;
  margin: 72px auto 0;
}
.features-visual {
  position: relative;
  height: 520px;
  display: flex;
  align-items: center;
  justify-content: center;
}
#book2-canvas { position: absolute; inset: 0; width: 100%; height: 100%; }

/* ── PRICING CARD ── */
.pricing-card {
  max-width: 500px;
  margin: 52px auto 0;
  background: var(--graph);
  border: 1px solid var(--bdr);
  border-radius: var(--r-xl);
  padding: 44px;
  position: relative;
  overflow: hidden;
  text-align: center;
}
.pricing-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
}
.pricing-amount { margin: 16px 0 6px; }
.price-main { font-family: var(--font-display); font-size: 68px; font-weight: 800; letter-spacing: -0.06em; line-height: 1; }
.price-main sup { font-size: 28px; vertical-align: top; margin-top: 12px; }
.price-old { font-size: 18px; color: var(--muted); text-decoration: line-through; margin-left: 10px; }
.price-note { font-size: 13px; color: var(--muted); margin-bottom: 28px; }
.price-features { text-align: left; display: flex; flex-direction: column; gap: 12px; margin-bottom: 36px; }
.price-feature { display: flex; align-items: center; gap: 11px; font-size: 13px; color: var(--muted); }
.check { width: 17px; height: 17px; border-radius: 50%; background: rgba(16,185,129,0.14); border: 1px solid rgba(16,185,129,0.28); display: flex; align-items: center; justify-content: center; flex-shrink: 0; font-size: 9px; color: var(--emerald); }
.trust-badges { display: flex; justify-content: center; gap: 16px; margin-top: 20px; flex-wrap: wrap; }
.trust-badge { font-size: 11px; color: var(--muted); }

/* ── MARQUEE ── */
.marquee-wrap { display: flex; flex-direction: column; gap: 22px; margin-top: 56px; overflow: hidden; }
.marquee-row { display: flex; gap: 22px; will-change: transform; }

/* ── FLOAT WIDGET ── */
#float-widget {
  position: fixed;
  bottom: 24px; right: 24px;
  z-index: 400;
  background: rgba(13,17,23,0.92);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid var(--bdr);
  border-radius: var(--r-lg);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 14px;
  transform: translateY(120px);
  opacity: 0;
  transition: transform var(--dur-mid) var(--ease-out), opacity var(--dur-mid);
  pointer-events: none;
}
#float-widget.visible {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}
.fw-thumb { width: 40px; height: 54px; background: linear-gradient(135deg,#1a2035,#0d1117); border-radius: 5px; border: 1px solid var(--bdr); display: flex; align-items: center; justify-content: center; font-size: 18px; flex-shrink: 0; }
.fw-title { font-size: 12px; font-weight: 700; }
.fw-price { font-family: var(--font-display); font-size: 18px; font-weight: 800; color: var(--gold); }

/* ── MODAL ── */
#modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0,0,0,0.75);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-mid);
}
#modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}
#modal {
  background: #0D1117;
  border: 1px solid var(--bdr);
  border-radius: var(--r-xl);
  width: 100%;
  max-width: 460px;
  padding: 40px;
  position: relative;
  transform: scale(0.94) translateY(16px);
  transition: transform var(--dur-mid) var(--ease-out);
  max-height: 90vh;
  overflow-y: auto;
}
#modal::-webkit-scrollbar { width: 3px; }
#modal::-webkit-scrollbar-thumb { background: var(--bdr); border-radius: 2px; }
#modal-overlay.open #modal { transform: scale(1) translateY(0); }

/* ── FOOTER ── */
footer {
  padding: 50px 48px;
  border-top: 1px solid var(--bdr);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-logo { font-family: var(--font-display); font-size: 14px; font-weight: 800; letter-spacing: 0.18em; text-transform: uppercase; }
.footer-copy { font-size: 11px; color: var(--muted); }

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  #hero { grid-template-columns: 1fr; padding: 90px 20px 50px; }
  .hero-right { height: 300px; }
  #nav { padding: 14px 20px; }
  .nav-links { display: none; }
  .btn-nav { font-size: 11px; padding: 8px 14px; }
  #float-widget { left: 12px; right: 12px; bottom: 12px; }
  .features-grid { grid-template-columns: 1fr; gap: 40px; }
  #features, #pricing { padding: 80px 20px; }
  .features-visual { height: 300px; }
  footer { padding: 36px 20px; flex-direction: column; align-items: flex-start; }
  .chapters-track { padding: 8px 20px 16px; }
  #modal { padding: 28px 22px; }
  section { padding: 80px 0; }
  .section-header { padding: 0 20px; }
}