:root{--o-ink:var(--ig-ink,#1b1917);--o-muted:var(--ig-muted,#5d574f);--o-rule:var(--ig-rule,#ded7cc);--o-accent:var(--ig-accent,#8a4b26);
  --lab-bg:#131517;--lab-panel:#171a1c;--lab-line:#2c3236;--lab-ink:#eaeff1;--lab-muted:#b4c1c8;--lab-faint:#93a3ad;--lab-on:#b4f2d2;--lab-on-bg:#1c3029;--lab-on-line:#7fc4a2;
  font-family:Inter,-apple-system,BlinkMacSystemFont,"Noto Sans JP",sans-serif;font-synthesis:none}
*{box-sizing:border-box}body{margin:0}a{color:inherit;text-underline-offset:4px}
button,input{font:inherit}button,a,input{outline-offset:4px}
button{cursor:pointer;color:inherit;background:transparent;border:1px solid var(--o-rule);border-radius:5px;padding:10px 14px;font-size:14px;min-height:42px}
header{max-width:1500px;margin:auto;display:flex;justify-content:space-between;align-items:center;padding:25px 40px;border-bottom:1px solid var(--o-rule);font-size:14px;color:var(--o-ink)}
.brand{text-decoration:none;letter-spacing:.12em;font-weight:650}.brand span{color:var(--o-muted);font-weight:400;letter-spacing:0;margin-left:15px}
main{max-width:1500px;margin:auto;padding:0 40px;color:var(--o-ink)}
.intro{display:flex;align-items:center;justify-content:space-between;gap:50px;padding:38px 0 28px}
.eyebrow{font-size:12px!important;letter-spacing:.13em;color:var(--o-muted);font-weight:600;line-height:1.7}
h1{font-size:clamp(30px,3.4vw,52px);letter-spacing:-.04em;font-weight:500;line-height:1.15;margin:12px 0}
p{font-size:16px;line-height:1.75;color:var(--o-muted)}.intro>p{max-width:430px;margin:0}
.tabs{display:flex;gap:8px;margin-bottom:0}
.tabs button{padding:14px 22px;border-radius:6px 6px 0 0;border-bottom:0;color:var(--o-ink);background:transparent;border-color:var(--o-rule)}
.tabs button:hover{background:color-mix(in srgb,var(--o-ink) 6%,transparent)}
.tabs button[aria-pressed=true]{background:var(--lab-bg);color:var(--lab-on);border-color:var(--lab-bg)}
.lab{display:grid;grid-template-columns:minmax(0,1fr) 345px;border:1px solid var(--lab-line);background:var(--lab-panel);min-height:640px;color:var(--lab-ink);border-radius:0 6px 6px 6px;overflow:hidden;color-scheme:dark}
.lab p{color:var(--lab-muted)}.lab .eyebrow{color:var(--lab-faint)}
.lab button{color:var(--lab-ink);border-color:#3d464c;background:#1d2124}.lab button:hover{background:#262c30}
.lab button[aria-pressed=true]{color:var(--lab-on);border-color:var(--lab-on-line);background:var(--lab-on-bg)}
.stage{min-height:640px;position:relative;min-width:0;display:flex;flex-direction:column;background:var(--lab-bg)}
.stage-top,.stage-bottom{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;gap:16px;font-size:13px;color:var(--lab-faint);position:relative;z-index:2}
.stage-top span:first-child{font-size:14px;color:var(--lab-ink)}.stage-top span:last-child{font-size:11px;letter-spacing:.07em}
#canvas-host{flex:1;min-height:450px;overflow:hidden;position:relative}canvas{display:block;touch-action:none}
.stage-bottom{font-size:12px}.stage-bottom button{font-size:12px}
#tags{position:absolute;inset:0;pointer-events:none;z-index:1}#tags svg{position:absolute;inset:0;width:100%;height:100%;overflow:visible}
#tags svg path{fill:none;stroke:#d9e6ea;stroke-width:1;opacity:.55}#tags svg circle{fill:#131517;stroke:#d9e6ea;stroke-width:1.3;opacity:.85}
#tags svg path.on{stroke:var(--lab-on);opacity:1;stroke-width:1.4}#tags svg circle.on{stroke:var(--lab-on);fill:var(--lab-on)}
.tag{position:absolute;font-size:12px;line-height:1.25;color:var(--lab-ink);background:#14181bdd;border:1px solid #39424a;padding:4px 8px;border-radius:3px;white-space:nowrap;backdrop-filter:blur(3px)}
.tag.on{color:var(--lab-on);border-color:var(--lab-on-line);background:#15241ee6}
#stage-legend{position:absolute;top:52px;right:16px;z-index:2;display:flex;flex-wrap:wrap;justify-content:flex-end;gap:6px 12px;max-width:60%;font-size:12px;color:var(--lab-muted);pointer-events:none}
#stage-legend span{display:flex;align-items:center;gap:6px;background:#14181bcc;padding:3px 8px;border-radius:3px}
#stage-legend i{width:12px;height:12px;border-radius:2px;display:inline-block}#stage-legend i.sw{width:28px;height:4px}
.q{display:inline-grid;place-items:center;width:18px;height:18px;border-radius:50%;font-size:13px;font-weight:700;color:#0d1114;margin-right:2px}
.q.e{background:#5aa6ff}.q.h{background:#ffad5e}.q.p{background:#8cffb4}.q.x{background:#e3ffe9}
aside{padding:22px 24px;border-left:1px solid var(--lab-line);overflow:auto}
label{display:flex;justify-content:space-between;gap:10px;font-size:14px;margin:0 0 4px;color:var(--lab-ink)}
output{font-variant-numeric:tabular-nums;color:var(--lab-on)}
input[type=range]{width:100%;display:block;margin:6px 0 18px;accent-color:#a0d9bd;cursor:pointer;min-height:22px}
input.ch-r{accent-color:#ff6476}input.ch-g{accent-color:#74dbb0}input.ch-b{accent-color:#77aaff}
.list-head{margin:2px 0 8px}
.layer-list{display:flex;flex-direction:column;gap:3px}
.lab .layer-list button{border-color:transparent;background:transparent;text-align:left;padding:6px 10px;font-size:13.5px;display:flex;align-items:center;gap:10px;min-height:34px;color:var(--lab-ink)}
.lab .layer-list button:hover{background:#22282c}
.lab .layer-list button[aria-pressed=true]{border-color:var(--lab-on-line);color:var(--lab-on);background:var(--lab-on-bg)}
.layer-list button span{width:10px;height:10px;flex-shrink:0;border-radius:2px;box-shadow:0 0 0 1px #ffffff22}
.detail{margin-top:20px;border-top:1px solid var(--lab-line);padding-top:8px}.detail h2{font-size:21px;font-weight:500;line-height:1.4;color:var(--lab-ink);margin:4px 0 6px}
.detail p:not(.eyebrow){font-size:14px;line-height:1.75}
.legend{display:flex;flex-wrap:wrap;gap:14px;font-size:14px;margin:14px 0 22px}.legend span{display:flex;align-items:center;gap:6px}
.phase-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:4px;margin:-10px 0 16px;font-size:11px;color:var(--lab-faint)}
.phase-steps span{border-top:2px solid #39424a;padding-top:4px}.phase-steps span.on{border-color:var(--lab-on);color:var(--lab-on)}
.note{font-size:13px}.presets{display:flex;gap:6px;flex-wrap:wrap;margin:0 0 18px}.lab .presets button{min-height:36px;padding:6px 12px;font-size:13px}
.mix{display:flex;align-items:center;gap:15px;margin:6px 0 18px}.mix p{font-size:13px;margin:0}.mix strong{display:block;color:var(--lab-ink);font-size:18px;font-weight:400;font-variant-numeric:tabular-nums}
#swatch{width:65px;height:65px;border:1px solid #627988;border-radius:5px;box-shadow:0 0 24px -4px currentColor}
.model-note{font-size:12px;line-height:1.8;color:var(--o-muted);padding:13px 0}
.reading{display:grid;grid-template-columns:1fr 1fr;gap:80px;padding:60px 0;border-bottom:1px solid var(--o-rule)}
h2{font-size:29px;font-weight:500;letter-spacing:-.02em;line-height:1.35}h3{font-weight:500;font-size:22px}
.variants{padding:40px 0}.variant-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:35px}.variant-grid article{border-top:2px solid var(--o-accent)}
footer{border-top:1px solid var(--o-rule);padding:30px 0 50px;max-width:100%}footer h2{font-size:20px}footer ol{columns:2;padding-left:22px;font-size:14px;line-height:2}footer p{font-size:13px;max-width:850px}footer a{color:var(--o-accent)}
#fallback{padding:30px;line-height:1.7;color:#ffd39a}[hidden]{display:none!important}
@media(max-width:1000px){main{padding:0 22px}.lab{grid-template-columns:minmax(0,1fr) 300px}.intro{gap:25px}.intro>p{max-width:350px}aside{padding:20px}.reading{gap:35px}.stage-top{flex-wrap:wrap}header{padding:20px 22px}}
@media(max-width:740px){header{padding:18px}.brand span{display:none}main{padding:0 16px}.intro{display:block;padding:28px 0 23px}.intro>p{max-width:none;font-size:15px}.intro h1{margin-bottom:18px}.tabs{gap:3px}.tabs button{font-size:12px;padding:12px 8px;flex:1;min-width:0}.lab{display:block;border-radius:0 0 6px 6px}.stage{min-height:540px}#canvas-host{min-height:360px}.stage-top,.stage-bottom{padding:12px 14px;font-size:11px}.stage-top span:last-child{font-size:10px}#stage-legend{top:44px;right:10px;left:10px;max-width:none;font-size:11px}aside{border-left:0;border-top:1px solid var(--lab-line);padding:22px}.reading{grid-template-columns:1fr;padding:30px 0;gap:20px}.variant-grid{grid-template-columns:1fr;gap:12px}footer ol{columns:1}.reading h2{font-size:26px}.model-note{font-size:11px}.stage-bottom button{white-space:nowrap}.tag{font-size:11px;padding:3px 6px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto}}