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var(--line-2),0 18px 40px -12px rgba(0,0,0,.6);font-size:13px;line-height:1.5;color:var(--ink-2);opacity:0;transform:translateY(4px);pointer-events:none;transition:opacity .16s,transform .16s var(--ease)}.mth-tip b{display:block;color:var(--ink);font-weight:600;margin-bottom:2px}.mth-tip.on{opacity:1;transform:none}.mth-card{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r);padding:22px}.mth-card-head{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:8px 16px;margin-bottom:18px}.mth-card-head h3{font-family:inherit;font-size:15px;font-weight:600}.mth-card-head span{font-size:12px;color:var(--ink-3)}.mth-illus{mix-blend-mode:lighten}.mth-hero{padding:calc(var(--mth-top) + 96px) 0 72px}.mth-hero .mth-wrap{display:grid;grid-template-columns:1.15fr 1fr;gap:64px;align-items:end}.mth-hero .mth-lead{margin:24px 0 32px}.mth-toc{border-top:1px solid var(--line)}.mth-toc a{position:relative;display:grid;grid-template-columns:44px 1fr 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p{margin-top:10px;font-size:14px;color:var(--ink-3)}.mth-cta{padding:120px 0;text-align:center;border-top:1px solid var(--line)}.mth-cta .mth-h2{margin-bottom:12px}.mth-cta p{color:var(--ink-2);margin:0 auto 28px;max-width:46ch}@media (prefers-reduced-motion:no-preference){.mth .mth-reveal{opacity:0;transform:translateY(18px)}}.mth-curve svg{width:100%;height:auto;overflow:visible}.mth-curve .mth-grid line{stroke:var(--line)}.mth-curve .mth-bar{fill:rgba(255,255,255,.07);transition:fill .3s;cursor:pointer}.mth-curve .mth-bar.on{fill:rgba(255,255,255,.2)}.mth-curve .mth-committed{fill:none;stroke:var(--sky);stroke-width:2}.mth-curve .mth-area{fill:url(#mth-cgrad)}.mth-curve .mth-ax{fill:var(--ink-3);font-size:11px}.mth-curve .mth-cursor{stroke:var(--ink);stroke-width:1;stroke-dasharray:3 4;transition:transform .45s var(--ease)}.mth-curve .mth-dot{fill:var(--bg-2);stroke:var(--sky);stroke-width:2;transition:transform .45s var(--ease)}.mth-curve input{width:100%;min-height:44px;margin-top:10px;accent-color:var(--sky)}.mth-readout{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:16px}.mth-readout div{padding-top:10px;border-top:1px solid var(--line)}.mth-readout strong{display:block;font-size:22px;font-weight:600;letter-spacing:-.02em;font-variant-numeric:tabular-nums}.mth-readout span{font-size:12px;color:var(--ink-3)}.mth-vm{position:relative;aspect-ratio:16/10}.mth-vm svg{position:absolute;inset:0;width:100%;height:100%}.mth-vm .mth-v-line{stroke:var(--line-2);stroke-width:1.5;fill:none}.mth-vm .mth-v-link{stroke:var(--sky);stroke-width:1.5;stroke-dasharray:4 5;fill:none;opacity:0;transition:opacity .3s}.mth-vm .mth-v-link.on{opacity:1;animation:mth-dash 1.2s linear infinite}@keyframes mth-dash{to{stroke-dashoffset:-18}}.mth-vm .mth-node.left{min-height:44px;display:flex;align-items:center;justify-content:center}.mth-vm .mth-node{position:absolute;transform:translate(-50%,-50%);width:27%;padding:7px 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