:root{--violet:#6556e8;--violet-dark:#4538bc;--violet-soft:#ece9ff;--violet-wash:#f6f4ff;--ink:#18172a;--ink-soft:#3b3950;--muted:#666579;--line:#e2e0ec;--paper:#fff;--shell:#f7f6fb;--mint:#dff6ef;--mint-ink:#0c6a58;--amber:#fff0c7;--amber-ink:#805900;--sans:system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--mono:ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;--gutter:clamp(20px, 5vw, 72px);--stack:clamp(64px, 9vw, 128px);--radius:14px}*{box-sizing:border-box}html{scroll-behavior:smooth}@media 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var(--line);border-radius:24px;min-width:0;margin:0;overflow:hidden;box-shadow:0 28px 72px #221f481c}.hero-demo__head{justify-content:space-between;align-items:center;gap:18px;padding:20px 22px;display:flex}.hero-demo__head h2{margin-top:3px;font-size:clamp(1.25rem,2vw,1.65rem)}.hero-demo__kicker,.hero-demo__format,.hero-demo__counter{font-family:var(--mono);letter-spacing:.09em;text-transform:uppercase;font-size:.68rem}.hero-demo__kicker{color:var(--violet)}.hero-demo__format{background:var(--violet-soft);color:var(--violet-dark);border-radius:999px;flex:none;padding:7px 10px}.hero-demo__controls{flex:none;align-items:center;gap:8px;display:flex}.hero-demo__playback{border:1px solid var(--line);background:var(--paper);min-height:34px;color:var(--ink-soft);font:650 .72rem/1 var(--sans);cursor:pointer;border-radius:999px;padding:7px 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span.is-active{border-color:var(--violet);background:var(--violet-soft);color:var(--violet-dark)}.tool-shape{width:16px;height:16px;color:var(--violet);font:700 .75rem/1 var(--mono);place-items:center;display:inline-grid}.tool-shape--cylinder{border:2px solid;border-radius:50%/25%}.tool-shape--size,.tool-shape--combine{border:1px solid;border-radius:4px}.hero-demo__counter{z-index:2;color:var(--paper);background:#18172ae0;border-radius:999px;padding:7px 10px;position:absolute;bottom:14px;right:14px;box-shadow:0 4px 18px #18172a2e}.hero-demo figcaption{padding:20px 22px 22px}.hero-demo__active{gap:7px;min-height:68px;display:grid}.hero-demo__active p{color:var(--ink-soft);font-size:.92rem;line-height:1.45}.hero-demo__steps{grid-template-columns:repeat(5,minmax(0,1fr));gap:8px;margin-top:17px;display:grid}.hero-demo__steps button{border:1px solid var(--line);background:var(--paper);width:100%;min-height:46px;color:var(--ink-soft);font:650 .78rem/1.2 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var(--line);background:var(--paper);border-radius:16px;align-content:start;gap:8px;padding:24px;display:grid}.lessons-preview__count{font-family:var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--violet);font-size:.78rem}.lessons-preview__list p:last-child{color:var(--ink-soft);font-size:.95rem}.progression{background:var(--shell)}.progression__track li{background:var(--paper);border:1px solid var(--line);border-radius:16px;align-content:start;gap:8px;padding:26px;display:grid}.tick{background:var(--violet-soft);border-bottom:2px solid var(--violet);border-radius:3px;width:30px;height:6px;margin-bottom:6px}.cohort{font-family:var(--mono);letter-spacing:.06em;color:var(--muted);font-size:.78rem}.progression__track p:last-child{color:var(--ink-soft);font-size:.95rem}.learn__grid>li{align-content:start;gap:10px;display:grid}.learn__grid h3 a{text-decoration:none}.learn__grid h3 a:hover{color:var(--violet)}.learn__grid 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