:root{--primary:#1c1c1e;--on-primary:#fff;--brand-yellow:#ffd02f;--brand-blue:#4262ff;--brand-teal:#0fbcb0;--teal-light:#c3faf5;--canvas:#fff;--surface:#f7f8fa;--surface-soft:#fafbfc;--surface-yellow:#fff8e0;--hairline:#e0e2e8;--hairline-soft:#eef0f3;--hairline-strong:#c7cad5;--ink-deep:#050038;--ink:#1c1c1e;--slate:#555a6a;--steel:#6b6f7e;--page-bg:#f3f4f7;color:var(--ink);background:var(--page-bg);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;line-height:1.5}*{box-sizing:border-box}body{min-width:320px;margin:0}button,input{font:inherit}.app-shell{min-height:100vh;padding:24px}.topbar{background:var(--canvas);border:1px solid var(--hairline);border-radius:8px;justify-content:space-between;align-items:center;gap:24px;max-width:1480px;margin:0 auto 18px;padding:18px;display:flex}.brand-lockup{align-items:center;gap:14px;min-width:0;display:flex}.brand-mark{background:var(--brand-yellow);border:2px solid var(--ink-deep);color:var(--ink-deep);border-radius:8px;flex:none;justify-content:center;align-items:center;width:48px;height:48px;font-size:24px;font-weight:800;display:inline-flex}.topbar h1,.result-header h2,.block-title h2,.section-heading h2{color:var(--ink-deep);margin:0}.topbar h1{font-size:clamp(24px,3vw,38px);font-weight:800;line-height:1.08}.topbar p,.result-header p,.section-heading p{color:var(--slate);margin:5px 0 0;font-size:14px;line-height:1.5}.primary-action,.export-actions button,.series-toolbar button{cursor:pointer;font:inherit;border:0;justify-content:center;align-items:center;display:inline-flex}.primary-action{background:var(--primary);color:var(--on-primary);white-space:nowrap;border-radius:999px;gap:8px;min-height:44px;padding:0 20px;font-size:14px;font-weight:700}.primary-action:disabled,.export-actions 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input{opacity:0;pointer-events:none;position:absolute;inset:0}.upload-placeholder{color:var(--slate);text-align:center;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:6px;min-height:190px;display:flex}.upload-placeholder strong{color:var(--ink-deep)}.upload-placeholder small{color:var(--steel)}.source-preview{object-fit:contain;width:100%;height:230px;display:block}.file-meta{color:var(--slate);word-break:break-all;flex-direction:column;gap:4px;margin-top:10px;font-size:12px;display:flex}.segmented-control{background:var(--surface);border:1px solid var(--hairline);border-radius:8px;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px;padding:6px;display:grid}.segmented-control button{color:var(--slate);cursor:pointer;font:inherit;text-align:left;background:0 0;border:0;border-radius:6px;flex-direction:column;gap:2px;padding:10px;display:flex}.segmented-control button.active{background:var(--canvas);color:var(--ink-deep);box-shadow:0 8px 20px #05003814}.segmented-control span{font-weight:800}.segmented-control small{font-size:11px}.series-toolbar{color:var(--slate);justify-content:space-between;align-items:center;margin:12px 0 8px;font-size:12px;display:flex}.series-toolbar div{gap:6px;display:flex}.series-toolbar button{background:var(--surface);color:var(--ink);border-radius:999px;padding:5px 10px;font-size:12px}.series-grid{grid-template-columns:repeat(5,minmax(0,1fr));gap:7px;display:grid}.series-grid button{background:var(--surface-soft);border:1px solid var(--hairline);color:var(--ink);cursor:pointer;border-radius:6px;align-items:center;gap:5px;min-height:34px;padding:6px;display:flex;position:relative}.series-grid button.selected{border-color:var(--brand-blue);box-shadow:inset 0 0 0 1px var(--brand-blue)}.series-grid button>span{border-radius:999px;flex:none;width:12px;height:12px}.series-grid svg{color:var(--brand-blue);position:absolute;top:5px;right:5px}.field{gap:7px;margin-bottom:12px;display:grid}.dimension-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;display:grid}.field span,.slider-field span{color:var(--slate);font-size:13px;font-weight:650}.field input{background:var(--surface-soft);color:var(--ink-deep);font:inherit;text-align:center;border:0;width:100%;min-width:0;min-height:38px;padding:0 8px}.field input:focus{outline:0}.size-summary{background:var(--ink-deep);color:var(--on-primary);border-radius:8px;grid-template-columns:1fr auto;align-items:center;gap:2px 12px;margin-bottom:12px;padding:12px;display:grid}.size-summary span{color:#ffffffb8;font-size:12px;font-weight:700}.size-summary strong{grid-row:2;font-size:22px}.size-summary small{color:#fff8e0;white-space:nowrap;background:#ffffff1f;border-radius:999px;grid-area:1/2/span 2;align-self:center;padding:6px 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button:hover{background:var(--surface);color:var(--ink-deep)}.check-row{color:var(--ink);cursor:pointer;align-items:center;gap:9px;margin:10px 0 0;font-size:14px;display:flex}.check-row input{accent-color:var(--brand-blue);width:16px;height:16px}.slider-field{gap:8px;margin-top:10px;display:grid}.slider-field.disabled{opacity:.45}.slider-field input{accent-color:var(--brand-blue);width:100%}.result-panel{flex-direction:column;display:flex;overflow:hidden}.error-banner{color:#8a1f1f;background:#fff0f0;border-bottom:1px solid #f3c9c9;padding:12px 18px;font-size:14px}.result-header{justify-content:space-between;align-items:flex-start;gap:20px;padding:18px;display:flex}.result-header h2{font-size:22px}.export-actions{flex-wrap:wrap;justify-content:flex-end;gap:8px;display:flex}.export-actions button{background:var(--surface);color:var(--ink);border-radius:999px;gap:6px;min-height:36px;padding:0 13px;font-size:13px;font-weight:700}.export-actions button:first-child{background:var(--brand-yellow);color:var(--ink-deep)}.stat-strip{border-top:1px solid var(--hairline);grid-template-columns:repeat(4,minmax(0,1fr));display:grid}.stat-strip div{border-right:1px solid var(--hairline);gap:4px;padding:14px 18px;display:grid}.stat-strip div:last-child{border-right:0}.stat-strip span{color:var(--steel);font-size:12px}.stat-strip strong{color:var(--ink-deep);font-size:18px}.preview-stage{background:linear-gradient(90deg, #ffd02f2e 0 1px, transparent 1px 42px), linear-gradient(#4262ff1a 0 1px, transparent 1px 42px), var(--surface-soft);border-top:1px solid var(--hairline);min-height:420px;position:relative;overflow:hidden}.canvas-scroller{height:100%;max-height:620px;padding:28px;overflow:auto}.canvas-scroller canvas{background:var(--canvas);border:1px solid var(--hairline);border-radius:8px;margin:0 auto;display:block;box-shadow:0 22px 60px #05003824}.empty-state{color:var(--slate);text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:8px;min-height:420px;padding:28px;display:flex}.empty-state strong{color:var(--ink-deep);font-size:18px}.processing-mask{color:var(--ink-deep);z-index:2;background:#ffffffc7;justify-content:center;align-items:center;gap:10px;font-weight:800;display:flex;position:absolute;inset:0}.spin{animation:.9s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.color-section{border-top:1px solid var(--hairline);padding:18px}.section-heading{flex-direction:column;align-items:flex-start;gap:0}.color-list{grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:8px;max-height:260px;display:grid;overflow:auto}.color-row,.muted-row{background:var(--surface-soft);border:1px solid var(--hairline-soft);color:var(--slate);border-radius:8px;grid-template-columns:20px 48px 78px 1fr 44px;align-items:center;gap:8px;min-height:42px;padding:8px;font-size:12px;display:grid}.color-row strong{color:var(--ink-deep)}.swatch{border:1px solid #00000029;border-radius:6px;width:20px;height:20px}.muted-row{grid-column:1/-1;padding:14px;display:block}@media (width<=1080px){.workspace{grid-template-columns:1fr}.control-panel{grid-template-columns:repeat(2,minmax(0,1fr));display:grid}.upload-block{grid-row:span 2}}@media (width<=760px){.app-shell{padding:12px}.topbar,.result-header{flex-direction:column;align-items:stretch}.primary-action{width:100%}.control-panel{grid-template-columns:1fr}.stat-strip{grid-template-columns:repeat(2,minmax(0,1fr))}.stat-strip div:nth-child(2){border-right:0}.stat-strip div:first-child,.stat-strip div:nth-child(2){border-bottom:1px solid var(--hairline)}.export-actions{grid-template-columns:repeat(2,minmax(0,1fr));display:grid}.export-actions button{width:100%}.canvas-scroller{padding:16px}}