:root {
  --bg: #101020;
  --panel: #191931;
  --panel-2: #222242;
  --line: #34345b;
  --text: #f1f1fa;
  --muted: #aaaac5;
  --accent: #8b5cf6;
  --gold: #fbbf24;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--text); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; line-height: 1.6; }
a { color: inherit; }
.about-nav { position: sticky; top: 0; z-index: 20; height: 66px; display: flex; align-items: center; justify-content: space-between; padding: 0 max(22px, calc((100vw - 1180px) / 2)); background: rgba(16,16,32,.9); border-bottom: 1px solid rgba(255,255,255,.08); backdrop-filter: blur(12px); }
.about-brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 750; }
.about-brand img { width: 36px; height: 36px; }
.about-nav-cta { padding: 8px 13px; border: 1px solid var(--line); border-radius: 8px; text-decoration: none; font-size: .9rem; }
main, footer { width: min(1180px, calc(100% - 44px)); margin-inline: auto; }
.about-hero { min-height: 660px; display: grid; grid-template-columns: 1.08fr .92fr; gap: 70px; align-items: center; padding: 80px 0; }
.eyebrow { margin: 0 0 10px; color: #c4b5fd !important; font-size: .78rem !important; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 750px; margin-bottom: 22px; font-size: clamp(2.7rem, 6vw, 5.2rem); line-height: .99; letter-spacing: -.045em; }
h2 { margin-bottom: 16px; font-size: clamp(2rem, 4vw, 3.3rem); line-height: 1.08; letter-spacing: -.025em; }
h3 { margin-bottom: 8px; font-size: 1.04rem; }
.lead, .section-heading > p:not(.eyebrow) { max-width: 700px; color: var(--muted); font-size: 1.12rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 11px; margin-top: 30px; }
.button { display: inline-flex; min-height: 45px; align-items: center; justify-content: center; padding: 10px 17px; border: 1px solid var(--line); border-radius: 9px; text-decoration: none; font-weight: 750; }
.button.primary { border-color: var(--accent); background: var(--accent); color: #fff; }
.button:hover, .about-nav-cta:hover { filter: brightness(1.14); }
.about-scene-card { position: relative; height: 560px; margin: 0; overflow: hidden; border: 1px solid rgba(148,163,184,.22); border-radius: 24px; background: #121225; box-shadow: 0 30px 90px rgba(0,0,0,.4); isolation: isolate; }
.about-scene-card::after { content: ""; position: absolute; inset: 0; z-index: 2; pointer-events: none; box-shadow: inset 0 0 90px rgba(5,5,18,.28); }
.about-scene-toolbar { position: absolute; z-index: 6; top: 0; left: 0; right: 0; display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 16px; background: linear-gradient(rgba(10,10,25,.8), transparent); font-size: .72rem; }
.about-scene-status { display: inline-flex; align-items: center; gap: 7px; color: #e8e5ff; font-weight: 750; }
.about-scene-status i { width: 8px; height: 8px; border-radius: 50%; background: #ef4444; box-shadow: 0 0 0 4px rgba(239,68,68,.14), 0 0 16px rgba(239,68,68,.65); }
.about-scene-mode { color: #c4b5fd; border: 1px solid rgba(196,181,253,.25); border-radius: 999px; padding: 4px 8px; background: rgba(15,15,35,.45); }
.about-scene-canvas { position: absolute; inset: 0 0 142px; cursor: grab; touch-action: none; }
.about-scene-canvas:active { cursor: grabbing; }
.about-scene-canvas canvas { width: 100%; height: 100%; display: block; }
.about-scene-fallback { position: absolute; inset: 0; display: grid; place-items: center; padding: 30px; background: radial-gradient(circle at 50% 38%, rgba(124,58,237,.3), transparent 34%), linear-gradient(#17172d, #0e0e20); color: #aaaac5; font-size: .86rem; text-align: center; }
.about-scene-card.is-ready .about-scene-fallback { display: none; }
.about-scene-card.is-fallback .about-scene-fallback { color: #d8d5e8; }
.about-scene-caption { position: absolute; z-index: 7; left: 0; right: 0; bottom: 0; min-height: 142px; display: grid; grid-template-columns: minmax(0,1fr) auto; gap: 12px 20px; align-items: start; padding: 17px 18px 15px; border-top: 1px solid rgba(148,163,184,.18); background: rgba(13,13,30,.92); backdrop-filter: blur(14px); }
.about-scene-copy { min-width: 0; }
.about-scene-number { display: block; margin-bottom: 3px; color: #a78bfa; font: 750 .68rem/1.2 ui-monospace, SFMono-Regular, Consolas, monospace; letter-spacing: .08em; }
.about-scene-copy strong { display: block; overflow: hidden; color: #f8fafc; font-size: .96rem; text-overflow: ellipsis; white-space: nowrap; }
.about-scene-copy p { margin: 4px 0 0; color: #aaaac5; font-size: .78rem; line-height: 1.45; }
.about-scene-controls { display: flex; align-items: center; gap: 12px; padding-top: 5px; }
.about-scene-play { display: grid; place-items: center; width: 36px; height: 36px; border: 1px solid rgba(167,139,250,.55); border-radius: 50%; background: rgba(124,58,237,.24); color: #f5f3ff; cursor: pointer; }
.about-scene-play:hover { background: rgba(124,58,237,.48); }
.about-scene-steps { display: flex; gap: 7px; }
.about-scene-steps button { width: 24px; height: 5px; border: 0; border-radius: 999px; padding: 0; background: #41415f; cursor: pointer; transition: width .2s ease, background .2s ease; }
.about-scene-steps button.active { width: 38px; background: #a78bfa; }
.about-scene-steps button:focus-visible, .about-scene-play:focus-visible { outline: 2px solid #ddd6fe; outline-offset: 3px; }
.about-scene-hint { grid-column: 1 / -1; color: #777793; font-size: .67rem; }
.principle { display: grid; grid-template-columns: auto 1fr; gap: 24px; align-items: center; margin: 0 0 110px; padding: 30px; border: 1px solid rgba(251,191,36,.3); border-radius: 18px; background: rgba(251,191,36,.055); }
.principle img { width: 66px; height: 66px; }
.principle h2 { margin-bottom: 6px; font-size: clamp(1.35rem, 3vw, 2rem); }
.principle p { margin: 0; color: #ded8c7; }
.about-section { padding: 85px 0; border-top: 1px solid rgba(255,255,255,.08); }
.section-heading { max-width: 760px; margin-bottom: 42px; }
.section-heading.wide { max-width: 900px; }
.feature-grid { display: grid; gap: 16px; }
.feature-grid.four { grid-template-columns: repeat(4, 1fr); }
.feature-grid.three { grid-template-columns: repeat(3, 1fr); }
.feature-grid article { min-height: 240px; padding: 24px; border: 1px solid var(--line); border-radius: 15px; background: var(--panel); }
.feature-grid p, .step-list p { color: var(--muted); font-size: .94rem; }
.audience-grid article { min-height: 180px; }
.audience-grid h3 { margin-bottom: 13px; font-size: 1.15rem; }
.availability-note { display: grid; grid-template-columns: minmax(150px,.3fr) 1fr; gap: 24px; align-items: start; margin-top: 16px; padding: 22px 24px; border: 1px solid rgba(134,239,172,.25); border-radius: 14px; background: rgba(34,197,94,.065); }
.availability-note strong { color: #bbf7d0; font-size: 1.05rem; }
.availability-note p { margin: 0; color: #c7d8cc; }
.feature-icon { display: grid; place-items: center; width: 42px; height: 42px; margin-bottom: 38px; border-radius: 11px; background: rgba(139,92,246,.14); color: #ddd6fe; font-weight: 850; }
.split-section { display: grid; grid-template-columns: .9fr 1.1fr; gap: 70px; }
.step-list { display: grid; gap: 14px; }
.step-list article { display: grid; grid-template-columns: auto 1fr; gap: 16px; padding: 21px; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); }
.step-list b { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; background: var(--accent); }
.step-list p { margin: 0; }
.uses-section { display: grid; grid-template-columns: .8fr 1.2fr; gap: 60px; }
.uses-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.uses-list li { display: grid; grid-template-columns: minmax(130px,.42fr) 1fr; gap: 18px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.uses-list span { color: var(--muted); }
.data-note { display: grid; grid-template-columns: .8fr 1.2fr; gap: 60px; margin: 85px 0; padding: 35px; border-radius: 18px; background: var(--panel-2); }
.data-note h2 { font-size: clamp(1.7rem, 3vw, 2.5rem); }
.data-note p { color: #c7c7dc; }
.data-points > p { padding-bottom: 16px; border-bottom: 1px solid rgba(255,255,255,.08); }
.export-note { margin: 20px 0; padding: 18px; border: 1px solid rgba(196,181,253,.24); border-radius: 12px; background: rgba(139,92,246,.08); }
.export-note strong { display: block; margin-bottom: 6px; color: #ddd6fe; }
.export-note p { margin: 0; font-size: .9rem; }
.closing { max-width: 820px; margin: 120px auto; text-align: center; }
.closing img { width: 76px; height: 76px; margin-bottom: 20px; }
.closing p { color: var(--muted); font-size: 1.08rem; }
.closing .button { margin-top: 16px; }
footer { display: flex; justify-content: space-between; padding: 28px 0 45px; border-top: 1px solid rgba(255,255,255,.08); color: var(--muted); font-size: .88rem; }
@media (max-width: 900px) {
  .about-hero, .split-section, .uses-section, .data-note { grid-template-columns: 1fr; gap: 34px; }
  .about-hero { padding-top: 60px; }
  .about-scene-card { height: 620px; }
  .feature-grid.four { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .availability-note { grid-template-columns: 1fr; gap: 6px; }
}
@media (max-width: 620px) {
  main, footer { width: min(100% - 30px, 1180px); }
  .about-nav { padding-inline: 15px; }
  .about-brand span { display: none; }
  .about-hero { min-height: auto; padding: 54px 0 70px; }
  .about-scene-card { height: 500px; border-radius: 18px; }
  .about-scene-canvas { bottom: 164px; }
  .about-scene-caption { min-height: 164px; grid-template-columns: 1fr; gap: 8px; padding: 14px; }
  .about-scene-controls { position: absolute; right: 14px; top: 12px; }
  .about-scene-copy { padding-right: 135px; }
  .about-scene-copy p { font-size: .74rem; }
  .about-scene-hint { padding-top: 2px; }
  .principle { grid-template-columns: 1fr; }
  .feature-grid.four, .feature-grid.three { grid-template-columns: 1fr; }
  .feature-grid article { min-height: auto; }
  .feature-icon { margin-bottom: 24px; }
  .uses-list li { grid-template-columns: 1fr; gap: 5px; }
}
@media (max-width: 430px) {
  .about-scene-card { height: 560px; }
  .about-scene-canvas { bottom: 220px; }
  .about-scene-caption { min-height: 220px; }
  .about-scene-controls { position: static; grid-row: 2; justify-content: space-between; }
  .about-scene-copy { padding-right: 0; }
  .about-scene-hint { grid-row: 3; }
}