/* home: one fixed WebGL stage (the crystal) behind transparent sections of glass. */
.stage { position: fixed; inset: 0; z-index: 0; pointer-events: none; }
.stage canvas { width: 100%; height: 100%; display: block; }
.stage-fade { position: absolute; inset: 0; background: radial-gradient(ellipse at 50% 50%, transparent 40%, rgba(6,6,7,.75) 100%); }
main { position: relative; z-index: 1; }
body > header.nav, body > .sheet { z-index: 90; }

/* ---------- hero */
.hero { min-height: 100svh; display: grid; grid-template-rows: 1fr auto; padding-top: var(--nav); }
.hero-grid { display: grid; align-items: center; padding-top: clamp(24px, 6vh, 72px); padding-bottom: clamp(24px, 4vh, 48px); }
.hero-copy { display: grid; gap: clamp(20px, 3vh, 32px); justify-items: start; max-width: 720px; }
.hero-h { font-size: clamp(54px, 7.6vw, 118px); }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }
.facts { display: grid; grid-template-columns: repeat(4, 1fr); margin-bottom: clamp(20px, 3vh, 36px); padding: 8px; }
.fact { display: grid; gap: 4px; padding: 20px 24px; align-content: start; }
.fact + .fact { border-left: 1px solid var(--line); }
.fact b { font-family: var(--f-display); font-weight: 700; font-size: clamp(24px, 2.6vw, 38px); line-height: 1; letter-spacing: -.03em; }
.fact span { color: var(--mute); font-size: 14px; }

/* ---------- engine: scroll story */
.story { position: relative; height: 560vh; }
.story-in { position: sticky; top: 0; height: 100svh; display: grid; align-items: center; }
.story-grid { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: clamp(32px, 6vw, 96px); align-items: center; }
.story-head { display: grid; gap: 22px; align-content: start; }
.steps { list-style: none; margin: 18px 0 0; padding: 0; display: grid; gap: 4px; }
.steps li { display: flex; align-items: baseline; gap: 16px; padding: 10px 0; font-family: var(--f-display); font-weight: 700; font-size: clamp(24px, 2.6vw, 34px); letter-spacing: -.03em; color: rgba(255,255,255,.28); transition: color .4s var(--ease), transform .4s var(--ease); }
.steps li b { font-size: 12px; color: inherit; letter-spacing: 0; }
.steps li.on { color: #fff; transform: translateX(10px); }
.steps li.done { color: rgba(255,255,255,.55); }
.story-card { background: rgba(7, 8, 10, .62); padding: clamp(24px, 3vw, 40px); display: grid; gap: 18px; min-height: 420px; align-content: start; overflow: hidden; }
.story-bar { position: absolute; left: 0; top: 0; right: 0; height: 2px; background: var(--line); }
.story-bar i { display: block; height: 100%; width: 0; background: #fff; box-shadow: 0 0 18px #fff; }
.story-card .lead { max-width: 46ch; font-size: 17px; }
.story-viz { display: grid; gap: 10px; margin-top: 6px; }
.bar { display: grid; grid-template-columns: 96px minmax(0, 1fr) 70px; align-items: center; gap: 14px; font-family: var(--f-mono); font-size: 12px; color: var(--mute); }
.bar i { display: block; height: 10px; border-radius: 6px; background: linear-gradient(90deg, #fff, #8d94a0); transform-origin: left; width: var(--w, 0%); transition: width .9s var(--ease); }
.bar em { font-style: normal; text-align: right; color: var(--text); }
.bar.dim i { background: linear-gradient(90deg, #5c626d, #3a3e46); }
.viz-note { font-family: var(--f-mono); font-size: 12px; color: var(--mute); }
.viz-chain { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; font-family: var(--f-mono); font-size: 12px; }
.viz-chain span { padding: 6px 10px; border-radius: 10px; box-shadow: inset 0 0 0 1px var(--line-2); color: var(--text-2); }
.viz-chain i { color: var(--mute); font-style: normal; }

/* ---------- presets */
.presets { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 16px; }
.preset { padding: 30px; display: grid; gap: 18px; align-content: start; transition: transform .4s var(--ease); }
.preset:hover { transform: translateY(-4px); }
.preset h3 { display: flex; justify-content: space-between; align-items: baseline; }
.preset .split { display: grid; gap: 8px; }
.preset dl { margin: 0; display: grid; gap: 10px; font-size: 15px; }
.preset dt { font-family: var(--f-mono); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: var(--mute); }
.preset dd { margin: 2px 0 0; color: var(--text); }
.lev { padding: 28px 32px; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); gap: 12px 40px; align-items: center; }
.lev .eyebrow { grid-column: 1; } .lev .lead { grid-column: 1; font-size: 15px; }
.lev-grid { grid-column: 2; grid-row: 1 / span 2; display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.lev-grid div { padding: 18px; border-radius: 16px; box-shadow: inset 0 0 0 1px var(--line); display: grid; gap: 4px; }
.lev-grid b { font-family: var(--f-display); font-weight: 700; font-size: 30px; letter-spacing: -.03em; }
.lev-grid span { font-family: var(--f-mono); font-size: 11.5px; color: var(--mute); }

/* ---------- lab */
.lab { padding: clamp(18px, 2.4vw, 32px); display: grid; gap: 18px; }
.lab-ctl { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.seg { display: inline-flex; padding: 4px; border-radius: 14px; box-shadow: inset 0 0 0 1px var(--line-2); background: rgba(0,0,0,.25); }
.seg button { border: 0; background: transparent; height: 38px; padding: 0 16px; border-radius: 10px; font-weight: 600; font-size: 14px; color: var(--mute); transition: all .2s; }
.seg button:hover { color: #fff; }
.seg button.on { background: #f1f3f5; color: #08090a; }
#labChart { width: 100%; height: clamp(240px, 34vw, 380px); border-radius: 16px; background: rgba(0,0,0,.35); box-shadow: inset 0 0 0 1px var(--line); touch-action: pan-y; }
.lab-out { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.lab-out div { padding: 16px 18px; border-radius: 16px; box-shadow: inset 0 0 0 1px var(--line); display: grid; gap: 2px; }
.lab-out span { font-family: var(--f-mono); font-size: 11px; letter-spacing: .06em; text-transform: uppercase; color: var(--mute); }
.lab-out b { font-family: var(--f-display); font-weight: 700; font-size: clamp(22px, 2.4vw, 32px); letter-spacing: -.03em; line-height: 1.1; }
.lab-out small { color: var(--mute); font-size: 12.5px; }
.lab-note { margin: 0; font-size: 12px; color: var(--mute); }

/* ---------- board */
.board { padding: 8px; }
.board-head { display: grid; grid-template-columns: 40px 1.6fr 1fr 1fr 1fr 1fr; gap: 12px; padding: 14px 22px; font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: var(--mute); border-bottom: 1px solid var(--line); }
.board-row { display: grid; grid-template-columns: 40px 1.6fr 1fr 1fr 1fr 1fr; gap: 12px; align-items: center; padding: 16px 22px; border-bottom: 1px solid var(--line); text-decoration: none; transition: background .2s; }
.board-row:hover { background: var(--glass-2); }
.board-row .bc { display: grid; } .board-row .bc b { font-family: var(--f-display); font-size: 19px; letter-spacing: -.02em; } .board-row small { color: var(--mute); font-family: var(--f-mono); font-size: 12px; }
.board-empty { display: grid; justify-items: center; text-align: center; gap: 16px; padding: clamp(48px, 7vw, 96px) 24px; }
.board-empty .lead { max-width: 52ch; }
.board-orb { width: 74px; height: 74px; border-radius: 50%; background: radial-gradient(circle at 32% 28%, rgba(255,255,255,.9), rgba(255,255,255,.12) 38%, rgba(255,255,255,.04) 70%); box-shadow: inset 0 0 0 1px rgba(255,255,255,.35), 0 0 60px -10px rgba(255,255,255,.35); animation: orb 6s ease-in-out infinite; }
@keyframes orb { 50% { transform: translateY(-8px); } }

/* ---------- safety */
.trio { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.trio .card { display: grid; gap: 14px; align-content: start; padding: 32px; }
.trio p { margin: 0; font-size: 16px; }

/* ---------- faq */
.faq { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: clamp(32px, 6vw, 96px); align-items: start; }
.faq .sec-head { margin: 0; position: sticky; top: 120px; }
.faq-list details { border-top: 1px solid var(--line); }
.faq-list details:last-child { border-bottom: 1px solid var(--line); }
.faq-list summary { list-style: none; cursor: pointer; padding: 24px 52px 24px 0; position: relative; font-family: var(--f-display); font-weight: 700; font-size: clamp(19px, 1.8vw, 24px); letter-spacing: -.02em; line-height: 1.15; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: '+'; position: absolute; right: 6px; top: 50%; transform: translateY(-50%); font-family: var(--f-mono); font-size: 22px; color: var(--mute); transition: transform .3s var(--ease), color .3s; }
.faq-list details[open] summary::after { transform: translateY(-50%) rotate(45deg); color: #fff; }
.faq-list details p { margin: 0 0 26px; max-width: 62ch; color: var(--mute); }

/* ---------- closing */
.cta { padding: clamp(120px, 18vw, 260px) 0 clamp(90px, 12vw, 160px); }
.cta-in { display: grid; gap: 40px; justify-items: center; text-align: center; }
.cta-h { font-size: clamp(54px, 9.6vw, 150px); }

@media (max-width: 960px) {
  .hero-grid { align-items: end; }
  .facts { grid-template-columns: 1fr 1fr; }
  .fact:nth-child(3) { border-left: 0; } .fact:nth-child(n+3) { border-top: 1px solid var(--line); }
  .story { height: 520vh; }
  .story-grid { grid-template-columns: 1fr; gap: 20px; align-content: center; }
  .steps { display: flex; flex-wrap: wrap; gap: 4px 18px; margin-top: 4px; } .steps li { font-size: 20px; padding: 4px 0; } .steps li.on { transform: none; }
  .story-card { min-height: 0; }
  .presets, .trio { grid-template-columns: 1fr; }
  .lev { grid-template-columns: minmax(0, 1fr); padding: 24px 20px; } .lev > * { min-width: 0; } .lev-grid { grid-column: 1; grid-row: auto; grid-template-columns: 1fr; }
  .lab-out { grid-template-columns: 1fr 1fr; }
  .board-head { display: none; }
  .faq { grid-template-columns: 1fr; } .faq .sec-head { position: static; }
}