:root {
  --paper: #E8E5D8;
  --paper-warm: #EFEDE3;
  --ink: #1C1C1C;
  --ink-soft: rgba(28,28,28,.58);
  --glass: rgba(255,255,255,.45);
  --glass-line: rgba(255,255,255,.6);
  --acid: #E7F65E;
  --orange: #F9A16C;
  --teal: #619B8A;
  --pink: #E0A7C2;
  --gold: #D4A373;
  --r-lg: 32px;
  --r-md: 20px;
  --r-pill: 100px;
  --font: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: 'Space Mono', ui-monospace, Menlo, monospace;
  --ease: cubic-bezier(.16,1,.3,1);
  --spring: cubic-bezier(.34,1.56,.64,1);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  background: var(--paper); color: var(--ink);
  font: 400 16px/1.6 var(--font);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden; position: relative; min-height: 100vh;
}
.mono { font-family: var(--mono); }
.blob { position: fixed; border-radius: 50%; filter: blur(90px); opacity: .5; pointer-events: none; z-index: 0; }
.blob--1 { width: 460px; height: 460px; background: var(--acid); top: -160px; left: -140px; }
.blob--2 { width: 400px; height: 400px; background: var(--orange); bottom: -150px; right: -120px; opacity: .42; }
.skip { position: absolute; left: -9999px; display: inline-flex; align-items: center; min-height: 44px; }
.skip:focus { left: 20px; top: 20px; z-index: 40; background: var(--ink); color: var(--paper); padding: 0 20px; border-radius: var(--r-pill); }
:is(a, button, [tabindex]):focus-visible { outline: 3px solid var(--ink); outline-offset: 3px; }
.top { position: relative; z-index: 5; display: flex; align-items: center; justify-content: space-between;
  gap: 20px; padding: 22px clamp(18px, 4vw, 52px); }
.brand { font-weight: 600; font-size: 17px; letter-spacing: -.01em; }
.pill { display: inline-flex; align-items: center; gap: 9px; min-height: 40px; padding: 0 18px;
  border-radius: var(--r-pill); background: var(--glass); border: 1px solid var(--glass-line);
  backdrop-filter: blur(10px); font: 400 12.5px/1 var(--mono); }
.led { width: 7px; height: 7px; border-radius: 50%; background: var(--teal); animation: led 2.2s ease-in-out infinite; }
@keyframes led { 0%,100% { opacity: 1 } 50% { opacity: .35 } }
main { position: relative; z-index: 2; padding: 0 clamp(18px, 4vw, 52px) 60px; max-width: 1180px; margin: 0 auto; }
.hero { padding: clamp(24px, 5vw, 60px) 0 clamp(18px, 3vw, 34px); max-width: 760px; }
.kick { font: 400 12.5px/1 var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--ink-soft); }
.dot { color: var(--orange); }
h1 { font: 800 clamp(42px, 8vw, 88px)/.96 var(--font); letter-spacing: -.04em; margin: 16px 0 18px; }
h1 em { font-style: normal; color: var(--teal); }
.lede { font-size: clamp(15px, 1.7vw, 18px); color: var(--ink-soft); max-width: 54ch; }
.stage { display: flex; flex-direction: column; align-items: center; gap: 22px;
  padding: clamp(30px, 6vw, 66px) 0 clamp(20px, 3vw, 40px); }
.book { perspective: 1400px; width: min(760px, 100%); }
.spread {
  position: relative;
  border-radius: var(--r-lg);
  background: linear-gradient(168deg, var(--paper-warm), #E4E0D2);
  box-shadow: 0 2px 0 rgba(255,255,255,.7) inset, 0 26px 60px -26px rgba(28,28,28,.45);
  padding: clamp(22px, 3vw, 34px);
  min-height: clamp(430px, 52vw, 520px);
  transform-style: preserve-3d;
  transform: rotateX(var(--tx, 6deg)) rotateY(var(--ty, 0deg));
  transition: transform .5s var(--ease);
}
.spread::before { content: ""; position: absolute; left: 50%; top: 14px; bottom: 14px; width: 22px;
  transform: translateX(-50%);
  background: linear-gradient(90deg, transparent, rgba(28,28,28,.10) 45%, rgba(28,28,28,.10) 55%, transparent); }
.page { position: absolute; left: clamp(22px,3vw,34px); bottom: clamp(22px,3vw,34px);
  width: min(46%, 330px); z-index: 4; }
.num { font-size: 12px; color: var(--ink-soft); letter-spacing: .08em; }
h2 { font: 800 clamp(26px, 3.4vw, 40px)/1.02 var(--font); letter-spacing: -.03em; margin: 8px 0 10px; }
.page__d { font-size: 14px; line-height: 1.6; color: var(--ink-soft); }
.tags { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }
.tags li { font: 400 11px/1 var(--mono); padding: 7px 11px; border-radius: var(--r-pill);
  background: rgba(255,255,255,.6); border: 1px solid rgba(28,28,28,.1); }
.go { display: inline-flex; align-items: center; min-height: 44px; margin-top: 16px; padding: 0 22px;
  border-radius: var(--r-pill); background: var(--ink); color: var(--paper-warm);
  font: 500 13px/1 var(--font); text-decoration: none; position: relative; overflow: hidden;
  transition: transform .25s var(--spring); }
.go:hover { transform: translateY(-3px); }
.go::after { content: ""; position: absolute; inset: 0; transform: translateX(-120%) skewX(-18deg);
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.35), transparent); transition: transform .7s var(--ease); }
.go:hover::after { transform: translateX(120%) skewX(-18deg); }
.pop { position: absolute; right: clamp(22px,3vw,34px); top: clamp(24px,3vw,38px);
  width: min(50%, 340px); height: clamp(250px, 30vw, 320px);
  transform-style: preserve-3d; z-index: 3; }
.lay {
  position: absolute; left: 0; right: 0; bottom: 0;
  border-radius: var(--r-md);
  transform-origin: bottom center;
  display: flex; align-items: flex-start; padding: 11px 16px;
  font: 800 clamp(15px, 1.7vw, 22px)/1.05 var(--font); letter-spacing: -.02em;
  box-shadow: 0 12px 26px -14px rgba(28,28,28,.5);
  will-change: transform;
  transition: transform .55s var(--spring);
}
.lay--back  { height: 100%; left: 0;    right: 0;    background: var(--teal);   color: #F4F2E9; transform: rotateX(calc(90deg - var(--p,0) * 88deg)) translateZ(8px); }
.lay--mid   { height: 74%;  left: 7%;   right: 7%;   background: var(--orange); color: #2A1B10; transform: rotateX(calc(90deg - var(--p,0) * 83deg)) translateZ(26px); }
.lay--front { height: 44%;  left: 15%;  right: 15%;  background: var(--acid);   color: #23260A; transform: rotateX(calc(90deg - var(--p,0) * 78deg)) translateZ(52px); }
.lay span { display: block; }
.lay--back::after, .lay--front::after {
  content: ""; position: absolute; inset: 0; border-radius: inherit; opacity: .16; pointer-events: none;
  background: repeating-linear-gradient(45deg, currentColor 0 2px, transparent 2px 8px);
}
.lay span { position: relative; z-index: 1; }
.lay--back span, .lay--mid span { font: 700 11px/1 var(--mono); letter-spacing: .14em; text-transform: uppercase; }
.crease { position: absolute; left: 0; right: 0; bottom: -2px; height: 3px; border-radius: 3px;
  background: rgba(28,28,28,.16); }
.tab { position: absolute; right: clamp(30px,4vw,50px); bottom: -20px; z-index: 6;
  display: flex; flex-direction: column; align-items: center; gap: 7px;
  background: var(--gold); border: 0; border-radius: 0 0 var(--r-md) var(--r-md);
  padding: 12px 22px 14px; cursor: grab; min-height: 56px;
  box-shadow: 0 10px 20px -10px rgba(28,28,28,.5);
  transform: translateY(calc(var(--p,0) * -14px));
  transition: transform .4s var(--spring), background .2s;
}
.tab:active { cursor: grabbing; }
.tab:hover { background: #E0B184; }
.tab__grip { width: 34px; height: 4px; border-radius: 4px; background: rgba(28,28,28,.35); }
.tab__t { font: 700 11px/1 var(--mono); letter-spacing: .14em; text-transform: uppercase; color: #3B2A14; }
.pager { display: flex; align-items: center; gap: 14px; }
.rnd { width: 46px; height: 46px; border-radius: 50%; border: 1px solid rgba(28,28,28,.18);
  background: var(--glass); backdrop-filter: blur(8px); cursor: pointer; font-size: 17px;
  transition: transform .25s var(--spring), background .2s; }
.rnd:hover { transform: translateY(-3px); background: #fff; }
.dots { display: flex; gap: 7px; }
.dots button { width: 11px; height: 11px; border-radius: 50%; border: 0; padding: 0; cursor: pointer;
  background: rgba(28,28,28,.2); transition: transform .3s var(--spring), background .2s; }
.dots button:hover { transform: scale(1.35); }
.dots button.is-on { background: var(--ink); transform: scale(1.35); }
.stats { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 14px;
  padding: clamp(24px,4vw,50px) 0 0; }
.stat { border-radius: var(--r-lg); padding: 24px 22px; position: relative; overflow: hidden; }
.stat:nth-child(1) { background: var(--acid); }
.stat:nth-child(2) { background: var(--orange); }
.stat:nth-child(3) { background: var(--teal); color: #F4F2E9; }
.stat:nth-child(4) { background: var(--pink); }
.stat::after { content: ""; position: absolute; right: -20px; top: -20px; width: 110px; height: 110px;
  border-radius: 50%; background: repeating-linear-gradient(45deg, currentColor 0 2px, transparent 2px 7px); opacity: .18; }
.stat b { position: relative; z-index: 1; display: block; font: 800 clamp(30px,4vw,44px)/1 var(--font); letter-spacing: -.03em; }
.stat span { position: relative; z-index: 1; display: block; margin-top: 7px; font: 400 12px/1.3 var(--mono); }
.foot { position: relative; z-index: 2; display: flex; justify-content: space-between; gap: 18px;
  flex-wrap: wrap; padding: 26px clamp(18px,4vw,52px) 40px; border-top: 1px solid rgba(28,28,28,.12);
  max-width: 1180px; margin: 0 auto; font-size: 14px; color: var(--ink-soft); }
@media (max-width: 900px) {
  .pager { flex-wrap: wrap; justify-content: center; }
  .dots { gap: 0; flex-wrap: wrap; justify-content: center; max-width: 100%; }
  .dots button { width: 44px; height: 44px; background: transparent; position: relative; }
  .dots button::after { content: ""; position: absolute; inset: 0; margin: auto; width: 11px; height: 11px;
    border-radius: 50%; background: rgba(28,28,28,.2); transition: background .2s; }
  .dots button.is-on::after { background: var(--ink); }
  .dots button:hover { transform: none; }
  .dots button:hover::after { transform: scale(1.35); }
  .rnd { width: 48px; height: 48px; }
  .tab { min-height: 56px; }
}
@media (max-width: 820px) {
  .spread { min-height: 0; padding-bottom: 30px; }
  .page { position: static; width: auto; margin-top: clamp(220px, 44vw, 300px); }
  .pop { right: auto; left: clamp(22px,3vw,34px); width: calc(100% - clamp(44px,6vw,68px)); height: clamp(200px, 40vw, 260px); }
  .stats { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .tab { right: 50%; transform: translateX(50%) translateY(calc(var(--p,0) * -14px)); }
}
@media (max-width: 480px) { .stats { grid-template-columns: 1fr; } }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 1ms !important; animation: none !important; }
}