:root{--bg:#EFEFEC;--surface:#FFFFFF;--ink:#15161B;--muted:#6A6D74;--line:#D6D5D0;--accent:#2B3A8C;--on-accent:#FFFFFF;--bar:rgba(239,239,236,.72);--fill:rgba(21,22,27,.06);--r:14px;--shadow:0 1px 2px rgba(20,20,30,.06),0 18px 40px -18px rgba(20,20,30,.35);--mono:ui-monospace,"SF Mono",Menlo,monospace}@media(prefers-color-scheme:dark){:root{--bg:#0E0F12;--surface:#18191D;--ink:#F2F2F0;--muted:#9A9DA4;--line:#2C2D33;--accent:#8E9BFF;--on-accent:#0E0F12;--bar:rgba(14,15,18,.72);--fill:rgba(242,242,240,.08);--shadow:0 1px 2px rgba(0,0,0,.4),0 18px 40px -18px rgba(0,0,0,.8)}}*{box-sizing:border-box;margin:0}html{-webkit-text-size-adjust:100%}body{background:var(--bg);color:var(--ink);font:1rem/1.5 system-ui,-apple-system,SF Pro Text,sans-serif;padding-top:env(safe-area-inset-top);-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}.wrap{max-width:1080px;margin:0 auto;padding:0 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span{position:absolute;background:var(--bg);padding:0 6px;white-space:nowrap}.dim.w span{left:50%;top:-1px;transform:translate(-50%)}.dim.l span{top:50%;left:4px;transform:translate(-50%,-50%) rotate(90deg)}#v3d canvas{display:block;width:100%;height:100%;touch-action:none}.hint{position:absolute;bottom:4px;left:0;right:0;text-align:center;font-size:.75rem;color:var(--muted);pointer-events:none}.seg{display:grid;grid-auto-flow:column;grid-auto-columns:1fr;gap:4px;padding:4px;background:var(--fill);border-radius:12px}.seg button{all:unset;cursor:pointer;text-align:center;padding:10px 0;border-radius:9px;font:500 .9375rem/1.2 var(--mono);color:var(--muted);transition:transform .1s ease-out}.seg button:active{transform:scale(.97)}.seg button[aria-pressed=true]{background:var(--surface);color:var(--ink);box-shadow:0 1px 3px #0000001f}.seg small{display:block;font:.75rem/1.2 system-ui,sans-serif;margin-top:2px;opacity:.8}.seg.mini{width:max-content;margin:0 auto;border-radius:10px}.seg.mini button{padding:6px 16px;font:500 .8125rem/1.2 system-ui,sans-serif;border-radius:7px}.info{display:flex;justify-content:space-between;align-items:baseline;gap:16px;margin-top:24px}.info .price{font-size:1.25rem}#sizes{margin-top:22px}.guide{margin-top:36px;border-top:1px solid var(--line);padding:20px 0 12px}.guide h2{font-size:.8125rem;font-weight:600;color:var(--muted);letter-spacing:.01em;margin-bottom:12px}.guide ol{list-style:none;padding:0;display:grid;gap:14px;counter-reset:s}.guide li{display:grid;grid-template-columns:28px 1fr;gap:10px;font-size:.9375rem;line-height:1.45;counter-increment:s}.guide li:before{content:counter(s);display:grid;place-items:center;width:24px;height:24px;border-radius:50%;border:1px solid var(--line);font:500 .75rem/1 var(--mono);color:var(--muted)}.tip{margin-top:16px;padding:12px 14px;border-radius:12px;background:var(--fill);font-size:.875rem;color:var(--muted)}.tip b{color:var(--ink);font-weight:600}.bar{position:fixed;left:0;right:0;bottom:0;padding:12px 20px calc(12px + env(safe-area-inset-bottom));background:var(--bar);-webkit-backdrop-filter:blur(20px) saturate(180%);backdrop-filter:blur(20px) saturate(180%)}.cta{all:unset;box-sizing:border-box;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:10px;width:100%;height:54px;border-radius:var(--r);background:var(--accent);color:var(--on-accent);font-weight:600;font-size:1.0625rem;transition:transform .1s ease-out,opacity .2s}.cta:active{transform:scale(.97)}.cta[aria-disabled=true]{opacity:.4;cursor:default}.cta svg{width:20px;height:20px}.note{margin-top:8px;text-align:center;font-size:.8125rem;color:var(--muted)}.note:empty{display:none}.empty{padding:80px 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