:root{font-family:Inter,"Noto Sans JP","Yu Gothic UI",Meiryo,system-ui,sans-serif;color:#202629;background:#f4f5f6;font-size:14px;color-scheme:light;--text:#202629;--muted:#59636b;--line:#dfe3e5;--accent:#12695e;--tint:#e9f3ef;--surface:#fff}
*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button{cursor:pointer}button,input,select{touch-action:manipulation}button{border:1px solid transparent;border-radius:7px;background:transparent;color:var(--text);padding:9px 12px;line-height:1.4;transition:background .15s,border-color .15s}button:hover{background:#e9eded}button:disabled{opacity:.45;cursor:default}button:focus-visible,input:focus-visible,select:focus-visible,canvas:focus-visible{outline:3px solid #288d7e;outline-offset:3px}button.primary{background:var(--accent);color:#fff}button.primary:hover:not(:disabled){background:#0b5249}.secondary{background:var(--surface);border-color:#cfd5d8}.dark{background:#253137;color:white}.dark:hover:not(:disabled){background:#35454e}.full{width:100%}.text-button{padding:4px 0;font-size:12px;border-radius:3px;color:var(--muted)}.text-button:hover:not(:disabled){color:var(--accent);background:transparent;text-decoration:underline}.danger{color:#a13732}.muted{color:var(--muted);font-size:12px}.numeric,output{font-variant-numeric:tabular-nums}[hidden]{display:none!important}
.topbar{height:68px;background:#fff;border-bottom:1px solid var(--line);padding:0 32px;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:12px}.brand strong{font-size:21px;letter-spacing:.04em}.brand-mark{display:grid;place-items:center;background:var(--accent);color:#fff;width:33px;height:33px;border-radius:9px;font-size:28px;font-weight:700}.prototype-label{font-size:11px;color:#626e75;border:1px solid var(--line);border-radius:4px;padding:3px 6px;letter-spacing:.03em}.privacy{font-size:12px;color:var(--muted)}.privacy span{color:var(--accent);font-size:9px;margin-right:5px}main{max-width:1800px;margin:auto;padding:25px 28px 0}.intro{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:22px}h1{font-size:24px;margin:0 0 7px;line-height:1.4;letter-spacing:-.03em;text-wrap:balance}.intro p{margin:0;font-size:13px;color:var(--muted)}.intro-actions{display:flex;gap:10px;flex-shrink:0}.workspace{display:grid;grid-template-columns:204px minmax(0,1fr) 272px;min-height:615px;height:calc(100dvh - 208px);max-height:980px;border:1px solid var(--line);border-radius:12px;background:var(--surface);overflow:hidden}.panel-heading{display:flex;align-items:center;justify-content:space-between;gap:8px}.panel-heading h2{font-size:14px;font-weight:650;margin:0}.panel-heading h2 span{color:var(--muted);font-size:12px;font-weight:400;margin-left:6px}.library{padding:19px 15px 12px;display:flex;flex-direction:column;min-height:0;border-right:1px solid var(--line)}.selection-controls{display:flex;justify-content:space-between;padding:11px 0}.image-list{display:flex;flex-direction:column;gap:10px;overflow:auto;min-height:0;padding:2px;flex:1}.list-empty{font-size:12px;color:var(--muted);line-height:1.8;text-align:center;margin-top:80px}.image-card{position:relative;flex-shrink:0;border:2px solid transparent;border-radius:7px;background:#f3f5f5;overflow:hidden}.image-card.current{border-color:var(--accent)}.image-card .thumb-button{padding:0;display:block;width:100%;text-align:left;border:0;border-radius:0}.image-card canvas{width:100%;height:90px;object-fit:contain;display:block;background:#e9eeee}.thumb-label{display:block;padding:8px 8px 8px 29px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:11px}.image-card input{position:absolute;bottom:8px;left:7px;margin:0;accent-color:var(--accent);width:15px;height:15px;cursor:pointer}.library-note{font-size:10px;color:var(--muted);line-height:1.8;margin:14px 0 0}.editor{display:flex;flex-direction:column;min-height:0;min-width:0;background:#f8f9fa}.editor-heading{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:17px 20px 11px;background:white}.filename{font-size:12px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.toolbar{padding:0 13px 10px;display:flex;align-items:center;gap:3px;flex-wrap:wrap;background:#fff;border-bottom:1px solid var(--line)}.tool{font-size:12px;padding:7px 9px;white-space:nowrap}.tool.active{background:var(--tint);color:var(--accent);font-weight:600}.tool:last-child{margin-left:auto}.tool-hint{font-size:11px;color:var(--muted);margin:0;padding:10px 18px;min-height:36px}.stage{display:flex;align-items:center;justify-content:center;min-height:0;flex:1;overflow:auto;padding:18px 24px 26px;background-image:radial-gradient(#d6dcde .7px,transparent .7px);background-size:16px 16px}.stage.dragging{background-color:#dcefe6;outline:2px dashed var(--accent);outline-offset:-8px}.empty-state{text-align:center;line-height:1.8;padding:20px 0}.empty-symbol{display:grid;place-items:center;width:64px;height:64px;margin:0 auto 18px;background:#e8ecee;border:1px solid #d9e0e2;border-radius:15px;color:#68787f;font-size:38px;transform:rotate(-5deg)}.empty-state h2{font-size:18px;margin:0 0 9px}.empty-state p{color:var(--muted);font-size:13px;margin:0 0 23px}.empty-state>span{display:block;color:var(--muted);font-size:11px;margin-top:12px}.canvas-wrap{width:100%;height:100%;display:flex;align-items:center;justify-content:center;min-height:0}#preview{display:block;max-width:100%;max-height:100%;width:auto;height:auto;object-fit:contain;touch-action:none;box-shadow:0 5px 25px #20332815}#preview[data-tool]:not([data-tool="view"]){cursor:crosshair}.editor-footer{background:white;border-top:1px solid var(--line);padding:12px 16px;display:flex;align-items:center;justify-content:space-between;gap:10px}.editor-footer>div{display:flex;gap:14px}.editor-footer .secondary{font-size:12px}.settings{padding:19px 18px 15px;border-left:1px solid var(--line);overflow:auto}.settings-note{font-size:11px;color:var(--muted);margin:9px 0 22px}.settings fieldset{border:0;margin:0;padding:0;min-width:0}.settings fieldset:disabled{opacity:.45}.setting-block{margin-bottom:22px}.setting-block>label{font-size:12px;font-weight:550;display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}.setting-block output{font-size:11px;color:var(--muted);font-weight:400}.swatches{display:flex;gap:8px;align-items:center}.swatches button{width:29px;height:29px;flex-shrink:0;padding:0;border:2px solid white;border-radius:50%;background:var(--swatch);box-shadow:0 0 0 1px #d1d9d9}.swatches button[aria-pressed="true"]{box-shadow:0 0 0 2px var(--accent)}input[type="color"]{padding:2px;width:30px;height:30px;border:1px solid #cfd8d6;border-radius:5px;background:white;cursor:pointer}input[type="range"]{width:100%;accent-color:var(--accent);height:16px;margin:0;cursor:pointer}select{height:36px;width:100%;padding:0 10px;border:1px solid #d5dcdf;border-radius:6px;background:white;color:var(--text)}.field-hint{font-size:10px;color:var(--muted);line-height:1.7;margin:8px 0 0}.batch-block{margin-top:6px;padding-bottom:18px;border-bottom:1px solid var(--line)}.batch-block button{font-size:12px;padding:11px 7px}.batch-block p,.export-block p{font-size:10px;color:var(--muted);line-height:1.8;margin:9px 0 0}.export-block{padding-top:18px}.export-block>div{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.export-block strong{font-size:12px}.export-block span{font-size:10px;color:var(--muted)}.page-footer{padding:11px 3px;display:flex;gap:14px;justify-content:space-between;font-size:10px;color:var(--muted)}.annotation-options{display:flex;gap:10px;align-items:center;flex-wrap:wrap;background:white;padding:10px 17px;border-bottom:1px solid var(--line);font-size:11px}.annotation-options label{display:flex;align-items:center;gap:7px}.annotation-options input:not([type="color"]){width:160px;border:1px solid #cfd5d8;border-radius:5px;padding:6px 8px}.annotation-options select{width:75px;height:30px;font-size:11px}.status{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);padding:13px 22px;border-radius:9px;background:#253137;color:#fff;font-size:13px;max-width:min(600px,92vw);box-shadow:0 6px 25px #0002;z-index:10}.status.error{background:#8a312d}
@media(min-width:1550px){.workspace{grid-template-columns:224px minmax(0,1fr) 300px}.image-card canvas{height:105px}.setting-block{margin-bottom:26px}}
@media(max-width:1150px){main{padding:20px 16px 0}.workspace{grid-template-columns:164px minmax(0,1fr) 248px}.library{padding:17px 11px}.settings{padding:18px 13px}.stage{padding:15px}.editor-footer{flex-wrap:wrap}.toolbar{gap:0}.tool{padding:7px}.intro h1{font-size:21px}.swatches{gap:6px}}
@media(max-width:880px){.topbar{padding:0 18px;height:60px}.privacy{display:none}.intro{align-items:flex-start;flex-direction:column;gap:14px}.intro-actions{width:100%}.intro-actions button{flex:1}.workspace{grid-template-columns:minmax(0,1fr) 255px;height:auto;max-height:none;overflow:visible}.library{grid-column:1/-1;border-right:0;border-bottom:1px solid var(--line);padding:14px;display:grid;grid-template-columns:1fr 1fr;gap:8px}.selection-controls{padding:0;gap:15px;justify-content:flex-end}.image-list{grid-column:1/-1;flex-direction:row;min-height:40px;max-height:125px;padding:3px}.image-card{width:125px}.image-card canvas{height:72px}.list-empty{margin:3px 0;text-align:left}.library-note{display:none}.editor{height:650px;border-bottom-left-radius:12px;overflow:hidden}.settings{border-bottom-right-radius:12px}.stage{min-height:250px}.settings-note{margin-bottom:16px}.setting-block{margin-bottom:17px}}
@media(max-width:600px){main{padding:20px 10px 0}.workspace{grid-template-columns:1fr}.intro{padding:0 6px}.intro h1{font-size:21px}.intro p{font-size:12px}.intro-actions button{font-size:12px}.editor{height:520px;border-radius:0}.settings{border-left:0;border-top:1px solid var(--line);padding:20px;border-radius:0 0 12px 12px}.settings fieldset{display:grid;grid-template-columns:1fr 1fr;gap:0 24px}.setting-block:first-child,.setting-block:last-child{grid-column:1/-1}.swatches{gap:12px}.swatches button{width:34px;height:34px}.editor-heading{padding:14px}.toolbar{padding:0 6px 8px}.tool{font-size:11px;padding:8px 6px;min-height:36px}.tool:last-child{margin-left:0}.tool-hint{padding:9px 12px}.editor-footer{padding:10px;gap:9px}.editor-footer>div{gap:10px}.editor-footer .text-button{font-size:10px}.editor-footer .secondary{font-size:11px;padding:8px}.page-footer{font-size:9px;gap:12px;line-height:1.7}.annotation-options{padding:8px}.prototype-label{font-size:10px}.status{bottom:16px;font-size:12px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}

/* Keep batch export in view while the controls can scroll on short desktop windows. */
@media(min-width:881px){.settings{display:flex;flex-direction:column;overflow:hidden}.settings .panel-heading,.settings-note,.batch-block,.export-block{flex-shrink:0}.settings-note{margin-bottom:14px}.settings fieldset{flex:1;min-height:0;overflow-y:auto;padding:2px 2px 0}.setting-block{margin-bottom:16px}.batch-block{padding-top:10px;padding-bottom:12px}.export-block{padding-top:12px}.export-block>div{margin-bottom:9px}}

.page-footer a{color:var(--muted);text-decoration:underline;text-underline-offset:3px}.page-footer nav{line-height:1.8}.page-footer{flex-wrap:wrap}