:root{--paper:#f3eee2;--ink:#26382d;--muted:#5f6b60;--line:#c9c8b8;--accent:#995335;--green:#293d31}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.65 system-ui,"Noto Sans CJK SC",sans-serif}button,input{font:inherit}button,a,input{touch-action:manipulation}button{cursor:pointer}a{color:inherit;text-underline-offset:.25em}button:focus-visible,a:focus-visible,input:focus-visible,canvas:focus-visible{outline:2px solid var(--accent);outline-offset:5px}button:disabled{opacity:.5;cursor:wait}.wrap{width:min(1220px,calc(100% - 72px));margin:auto}
.mast{display:flex;align-items:center;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line);padding:23px 0}.wordmark{font:700 29px/1 Georgia,serif;letter-spacing:-.05em;text-decoration:none}.wordmark span{color:var(--accent)}.mast-note{font-size:10px;letter-spacing:.19em;color:var(--muted)}.quiet{font-size:12px}
.intro{display:flex;justify-content:space-between;gap:30px;align-items:end;padding:42px 0 35px}.eyebrow{font-size:10px;letter-spacing:.15em;font-weight:650;color:var(--accent);margin:0 0 15px}h1{font:600 clamp(36px,4.7vw,64px)/1.2 "Noto Serif CJK SC",SimSun,Georgia,serif;letter-spacing:-.055em;margin:0}h1 br{display:none}.intro-side{max-width:330px;flex-shrink:0}.intro-side p{color:var(--muted);font-size:14px;margin:0 0 10px}.privacy{font-size:11px;color:var(--muted)}.privacy span{color:#6d835b;margin-right:4px}
.workspace{display:grid;grid-template-columns:minmax(0,1fr) 300px;border:1px solid var(--line);background:#ede7da}.board{min-width:0;padding:17px 24px 14px}.board-top,.board-bottom{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:11px;color:var(--muted)}.small-label{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.text-button{background:none;border:0;color:var(--ink);padding:0;white-space:nowrap;font-size:11px}.stage{position:relative;display:flex;align-items:center;justify-content:center;min-height:390px;padding:22px 0 28px}.stage canvas{display:block;width:auto;height:auto;max-width:100%;max-height:370px;box-shadow:0 8px 22px #293d311c;cursor:grab;touch-action:none;background:var(--green)}.stage canvas:active{cursor:grabbing}.drag-hint{position:absolute;bottom:5px;font-size:10px;letter-spacing:.04em;color:var(--muted);pointer-events:none}.drop-cover{display:none;position:absolute;inset:0;align-items:center;justify-content:center;background:#293d31ed;color:var(--paper);font-family:serif;font-size:28px;pointer-events:none}.stage.dropping .drop-cover{display:flex}.board-bottom{border-top:1px solid var(--line);padding-top:12px;align-items:start}.board-bottom span:first-child{white-space:nowrap;font-variant-numeric:tabular-nums}.board-bottom span:last-child{text-align:right}
.controls{padding:24px;background:#f7f3ea;border-left:1px solid var(--line);display:flex;flex-direction:column;gap:22px}.control-section{margin:0;padding:0;border:0;min-width:0}.control-section legend{padding:0;margin-bottom:12px}.step{display:block;font-size:12px;letter-spacing:.08em;font-weight:650;color:var(--muted);margin-bottom:12px}legend .step{margin:0}.upload-button{display:flex;justify-content:space-between;align-items:center;background:transparent;border:1px solid #8c978a;padding:10px 13px;width:100%;font-size:13px;color:var(--ink)}.upload-button:hover{background:#e9ecdf}.help{font-size:12px;line-height:1.7;color:var(--muted);margin:9px 0 0}.segmented{display:flex;border:1px solid var(--line)}.segmented label{flex:1;text-align:center;position:relative;cursor:pointer}.segmented label+label{border-left:1px solid var(--line)}.segmented input,.swatch input{position:absolute;opacity:0;width:1px;height:1px}.segmented span{display:block;padding:7px 2px;font-size:12px}.segmented input:checked+span{background:var(--green);color:white}.segmented input:focus-visible+span{outline:2px solid var(--accent);outline-offset:2px}
.range-label{display:flex;justify-content:space-between;font-size:12px;margin-top:16px;color:var(--muted)}.range{width:100%;margin:8px 0 0;accent-color:var(--green);height:20px;cursor:pointer}.swatches{display:flex;gap:19px}.swatch{display:flex;flex-direction:column;align-items:center;gap:5px;font-size:12px;position:relative;cursor:pointer}.color{width:29px;height:29px;border:1px solid var(--line);display:block;border-radius:50%}.color-none{background:linear-gradient(135deg,#f7f3ea 48%,#b7b6a2 49%,#b7b6a2 51%,#f7f3ea 52%)}.color-white{background:white}.color-cream{background:var(--paper)}.swatch input:checked+.color{outline:1.5px solid var(--green);outline-offset:3px}.swatch input:focus-visible+.color{outline:2px solid var(--accent);outline-offset:4px}.export{margin-top:auto}.primary{display:flex;align-items:center;justify-content:space-between;width:100%;border:0;background:var(--green);color:white;padding:12px 16px;font-size:13px}.primary:hover:not(:disabled){background:#3e5543}.export .help{text-align:center}.status{min-height:20px;color:var(--accent);font-size:12px;margin:10px 0 0}
.about{display:grid;grid-template-columns:1fr 1fr;gap:40px;border-top:1px solid var(--line);margin-top:28px;padding:27px 0 35px}.about h2{font:600 27px/1.4 "Noto Serif CJK SC",SimSun,serif;margin:0;letter-spacing:-.03em}.about p{font-size:13px;color:var(--muted);margin:0 0 12px;max-width:42em}footer{border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:14px;padding:19px 0 24px;color:var(--muted);font-size:11px}
@media(max-width:900px){.mast-note{display:none}h1 br{display:block}.intro-side{max-width:230px}.workspace{grid-template-columns:minmax(0,1fr) 260px}.controls{padding:22px 18px}}
@media(max-width:640px){.wrap{width:calc(100% - 32px)}.mast{padding:20px 0}.intro{display:block;padding:30px 0 24px}.intro-side{max-width:none;margin-top:18px}.intro-side p{display:none}h1{font-size:39px}.workspace{grid-template-columns:1fr}.board{padding:14px}.stage{min-height:300px;padding-top:18px}.stage canvas{max-height:300px}.board-bottom{font-size:10px}.controls{border-left:0;border-top:1px solid var(--line);display:grid;grid-template-columns:1fr 1fr;gap:24px 20px;padding:20px}.control-section:first-child{grid-column:1/-1}.control-section:first-child .help{margin-top:7px}.export{align-self:end;grid-column:1/-1}.swatches{gap:14px}.about{grid-template-columns:1fr;gap:20px;margin-top:20px}.about h2 br{display:none}footer span:nth-child(2){display:none}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}