:root {
  --ink: #0b0d12;
  --ink-soft: #161a22;
  --paper: #f6f1e8;
  --mist: #8b93a7;
  --line: rgba(246, 241, 232, 0.12);
  --accent: #3d8fd1;
  --accent-dim: rgba(196, 163, 90, 0.18);
  --serif: "Fraunces", Georgia, serif;
  --sans: "Outfit", "Segoe UI", system-ui, sans-serif;
  --mono: "IBM Plex Mono", Consolas, monospace;
  --max: 1100px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 5rem; background: #0b0d12; color-scheme: dark; }
body {
  margin: 0;
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  color: var(--paper);
  background: #0b0d12;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: 0; background: none; color: inherit; }
.wrap { width: min(var(--max), calc(100% - 2.5rem)); margin-inline: auto; }
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 0.9rem 1.25rem;
  background: rgba(11, 13, 18, 0.72);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s var(--ease), background .3s var(--ease);
}
.nav.scrolled { border-bottom-color: var(--line); background: rgba(11, 13, 18, 0.92); }
.nav-brand { display: flex; align-items: center; gap: .65rem; font-weight: 600; letter-spacing: .02em; }
.nav-mark {
  width: 12px; height: 12px; border-radius: 3px;
  background: var(--accent); box-shadow: 0 0 18px var(--accent);
}
.nav-links { display: flex; gap: 1.25rem; font-size: .92rem; color: var(--mist); }
.nav-links a:hover { color: var(--paper); }
.nav-cta {
  padding: .55rem 1rem; border-radius: 999px; font-weight: 600; font-size: .9rem;
  background: var(--accent); color: #0b0d12;
}
.nav-toggle { display: none; width: 42px; height: 42px; place-items: center; gap: 5px; flex-direction: column; }
.nav-toggle span { display: block; width: 20px; height: 2px; background: var(--paper); }
.nav-mobile {
  display: none; position: fixed; inset: 64px 0 auto 0; z-index: 40;
  background: #12151c; border-bottom: 1px solid var(--line);
  padding: 1rem 1.25rem 1.25rem; flex-direction: column; gap: .85rem;
}
.nav-mobile.open { display: flex; }
.hero {
  position: relative; padding: 8.5rem 0 4rem;
  background:
    radial-gradient(ellipse 60% 50% at 80% 20%, color-mix(in srgb, var(--accent) 28%, transparent), transparent 70%),
    radial-gradient(ellipse 50% 40% at 10% 80%, color-mix(in srgb, var(--accent) 12%, transparent), transparent 70%),
    #0b0d12;
  overflow: visible; /* allow 3D book yaw to show without clipping */
}
.hero-grid {
  display: grid; grid-template-columns: 1.15fr .85fr; gap: 3rem; align-items: center;
}
.hero-kicker {
  display: inline-flex; align-items: center; gap: .6rem;
  font-family: var(--mono); font-size: .78rem; letter-spacing: .08em; text-transform: uppercase;
  color: var(--mist); margin-bottom: 1rem;
}
.hero-kicker em {
  font-style: normal; color: #0b0d12; background: var(--accent);
  padding: .2rem .5rem; border-radius: 4px; font-weight: 600;
}
h1 {
  font-family: var(--serif); font-weight: 450; font-size: clamp(2.4rem, 5vw, 3.6rem);
  line-height: 1.08; margin: 0 0 .75rem; letter-spacing: -0.02em;
}
h1 .thin {
  display: block; margin-top: .75rem;
  font-size: clamp(1.05rem, 2vw, 1.25rem); font-weight: 300; color: var(--mist);
  line-height: 1.45; max-width: min(36ch, 100%);
  overflow-wrap: break-word; word-wrap: break-word; hyphens: auto;
}
.lede { color: #d7d0c3; font-size: 1.08rem; max-width: 48ch; }
.hero-promise {
  margin: 1.5rem 0 0; padding: 1rem 1.15rem; border-left: 3px solid var(--accent);
  background: rgba(255,255,255,.03); border-radius: 0 12px 12px 0;
}
.hero-promise strong { display: block; font-family: var(--serif); font-size: 1.15rem; margin-bottom: .35rem; }
.hero-promise span { color: var(--mist); font-size: .98rem; }
.btn-row { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1.75rem; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: .85rem 1.25rem; border-radius: 999px; font-weight: 600;
  transition: transform .2s var(--ease), background .2s var(--ease);
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--accent); color: #0b0d12; }
.btn-ghost { border: 1px solid var(--line); color: var(--paper); }
.hero-meta {
  display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 1rem;
  margin-top: 2rem; padding-top: 1.25rem; border-top: 1px solid var(--line);
  font-size: .88rem; color: var(--mist);
}
.hero-meta strong { display: block; color: var(--paper); font-size: .95rem; margin-bottom: .15rem; }
.book-stage {
  display: flex; justify-content: center; align-items: center;
  perspective: 1400px;
  padding: 1.25rem 2.25rem 2rem 0.5rem; /* room for 3D yaw + ground shadow */
  overflow: visible;
  position: relative;
}
.book-showcase {
  width: min(270px, 70vw);
  transform-style: preserve-3d;
  position: relative;
}
.book-showcase::after {
  content: "";
  position: absolute;
  left: 12%; right: 8%; bottom: -20px;
  height: 32px;
  background: radial-gradient(ellipse at center, rgba(0,0,0,.55) 0%, transparent 72%);
  z-index: -1;
  pointer-events: none;
}
.book-3d {
  position: relative;
  transform: rotateY(-16deg) rotateX(5deg);
  transform-style: preserve-3d;
  transition: transform .55s var(--ease);
  filter: drop-shadow(18px 28px 36px rgba(0,0,0,.55));
}
.book-3d:hover {
  transform: rotateY(-7deg) rotateX(2deg) translateY(-8px);
}
.book-cover {
  position: relative;
  border-radius: 3px 8px 8px 3px;
  overflow: hidden;
  aspect-ratio: 2 / 3;
  background: #1a1f2a;
  box-shadow:
    inset -3px 0 0 rgba(255,255,255,.07),
    inset 0 0 0 1px rgba(0,0,0,.35),
    inset 48px 0 48px -36px rgba(255,255,255,.07);
  transform: translateZ(0);
}
.book-cover img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center center;
  display: block;
}
.book-spine-shade {
  position: absolute; inset: 0 auto 0 0; width: 16px; z-index: 2; pointer-events: none;
  background: linear-gradient(90deg, rgba(0,0,0,.6), color-mix(in srgb, var(--accent) 22%, transparent) 55%, transparent);
}
.book-pages {
  position: absolute;
  top: 4px; bottom: 4px; left: 100%;
  width: 16px;
  margin-left: -1px;
  border-radius: 0 3px 3px 0;
  background:
    linear-gradient(90deg, #cfc7b8 0%, #f3ede2 35%, #e7e0d2 70%, #bdb5a6 100%);
  box-shadow: 3px 0 10px rgba(0,0,0,.35);
  transform: translateZ(-8px) rotateY(8deg);
  transform-origin: left center;
}
.book-pages::before {
  content: "";
  position: absolute; inset: 8% 3px 8% 2px;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0 3px,
    rgba(0,0,0,.06) 3px 4px
  );
  opacity: .7;
}
.book-caption {
  margin-top: 1.35rem; text-align: center; color: var(--mist); font-size: .9rem;
  max-width: 28ch; margin-inline: auto;
}
.book-caption strong { color: var(--paper); display: block; margin-bottom: .2rem; }
.motto {
  border-block: 1px solid var(--line); background: #10131a;
  padding: 1.5rem 0; text-align: center;
}
.motto p { margin: 0; font-family: var(--serif); font-size: clamp(1.2rem, 2.5vw, 1.6rem); }
.motto span { color: var(--accent); }
.section { padding: 4.5rem 0; }
.section-label {
  font-family: var(--mono); font-size: .75rem; letter-spacing: .12em; text-transform: uppercase;
  color: var(--accent); margin-bottom: .75rem;
}
h2 {
  font-family: var(--serif); font-weight: 450; font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  line-height: 1.15; margin: 0 0 1rem;
}
.pillars {
  display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 1rem; margin-top: 2rem;
}
.pillar {
  padding: 1.25rem; border-radius: 16px; background: rgba(255,255,255,.03);
  border: 1px solid var(--line);
}
.pillar h3 { margin: 0 0 .5rem; font-size: 1.05rem; color: var(--accent); }
.pillar p { margin: 0; color: var(--mist); font-size: .95rem; }
.list-clean { margin: 1rem 0 0; padding: 0; list-style: none; }
.list-clean li {
  padding: .85rem 0; border-bottom: 1px solid var(--line); color: #d7d0c3;
  padding-left: 1.25rem; position: relative;
}
.list-clean li::before {
  content: ""; position: absolute; left: 0; top: 1.25rem;
  width: 7px; height: 7px; border-radius: 50%; background: var(--accent);
}
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 2.5rem; align-items: start; }
.card {
  padding: 1.5rem; border-radius: 18px; border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.015));
}
.series-strip {
  display: flex; flex-wrap: wrap; gap: .5rem; margin-top: 1rem;
}
.series-strip a {
  font-size: .78rem; font-family: var(--mono); padding: .35rem .55rem;
  border-radius: 999px; border: 1px solid var(--line); color: var(--mist);
}
.series-strip a:hover { border-color: var(--accent); color: var(--paper); }
.series-strip a.current { background: var(--accent-dim); border-color: var(--accent); color: var(--paper); }
.get {
  background:
    radial-gradient(ellipse 50% 60% at 50% 100%, color-mix(in srgb, var(--accent) 22%, transparent), transparent 70%),
    #0b0d12;
}
.footer {
  padding: 2rem 0 3rem; border-top: 1px solid var(--line); color: var(--mist); font-size: .88rem;
}
.footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; }
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.visible { opacity: 1; transform: none; }
.reveal-delay-1 { transition-delay: .08s; }
.reveal-delay-2 { transition-delay: .16s; }
.badge-status {
  display: inline-block; margin-top: .75rem; font-family: var(--mono); font-size: .75rem;
  color: var(--mist); border: 1px solid var(--line); padding: .3rem .55rem; border-radius: 6px;
}
@media (max-width: 900px) {
  .hero-grid, .two-col, .pillars { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .nav-toggle { display: inline-flex; }
  .hero-meta { grid-template-columns: 1fr; }
  .hero { padding-top: 7rem; }
}

/* Phase 2: mobile yaw + reduced motion */
@media (max-width: 720px) {
  .book-3d { transform: rotateY(-10deg) rotateX(3deg); }
  .book-3d:hover { transform: rotateY(-4deg) rotateX(1deg) translateY(-4px); }
  .book-showcase { width: min(240px, 72vw); }
}
@media (prefers-reduced-motion: reduce) {
  .book-3d,
  .book-3d:hover {
    transform: none !important;
    transition: none !important;
    filter: drop-shadow(8px 14px 22px rgba(0,0,0,.5));
  }
  .book-showcase::after { bottom: -12px; opacity: .85; }
}