:root{--bg: #eef0f6;--surface: #ffffff;--surface-sunken: #f4f6fa;--border: #e3e7ef;--border-strong: #ccd3e0;--ink: #101828;--ink-soft: #667085;--ink-faint: #98a2b3;--accent: #4f46e5;--accent-strong: #4338ca;--accent-soft: #eef0fe;--gradient: linear-gradient(135deg, #6366f1, #a855f7);--danger: #dc2626;--radius-lg: 16px;--radius: 12px;--radius-sm: 9px;--shadow-sm: 0 1px 2px rgba(16, 24, 40, .06);--shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 12px 32px -8px rgba(16, 24, 40, .12);--topbar-h: 60px}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:14px/1.5 system-ui,-apple-system,PingFang SC,Microsoft YaHei,sans-serif;-webkit-font-smoothing:antialiased}h1,h2{margin:0;font-weight:600}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}button{font:inherit;color:inherit;cursor:pointer;border:1px solid var(--border);background:var(--surface);border-radius:var(--radius-sm);padding:6px 12px;transition:background .14s,border-color .14s,color .14s,box-shadow .14s}button:hover:not(:disabled){border-color:var(--accent);color:var(--accent)}button:disabled{opacity:.45;cursor:not-allowed}button.is-active{background:var(--accent);border-color:var(--accent);color:#fff}button.ghost{background:transparent;border-color:transparent}button.primary{background:var(--gradient);border-color:transparent;color:#fff;box-shadow:0 1px 2px #4f46e559}button.primary:hover:not(:disabled){background:var(--gradient);color:#fff;filter:brightness(1.06)}.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;height:var(--topbar-h);padding:0 20px;background:var(--surface);border-bottom:1px solid var(--border)}.brand{display:flex;align-items:center;gap:12px}.brand-mark{display:grid;place-items:center;width:36px;height:36px;border-radius:11px;background:var(--gradient);color:#fff;font-weight:700;box-shadow:0 4px 12px -2px #6366f180}.brand h1{font-size:16px;letter-spacing:.01em}.brand p{margin:1px 0 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h2{display:flex;align-items:center;gap:9px;font-size:13px;font-weight:600;color:var(--ink);letter-spacing:.02em;margin-bottom:14px}.step{display:inline-grid;place-items:center;width:21px;height:21px;border-radius:7px;background:var(--accent-soft);color:var(--accent);font-size:11px;font-weight:700}.dropzone{display:grid;place-items:center;gap:3px;padding:26px 12px;border:1.5px dashed var(--border-strong);border-radius:var(--radius);background:var(--surface-sunken);cursor:pointer;text-align:center;transition:border-color .14s,background .14s,transform .14s}.dropzone:hover,.dropzone.is-over{border-color:var(--accent);background:var(--accent-soft);transform:translateY(-1px)}.dropzone-icon{display:grid;place-items:center;width:38px;height:38px;margin-bottom:4px;border-radius:999px;background:var(--surface);color:var(--accent);box-shadow:var(--shadow-sm);transition:transform .14s}.dropzone:hover .dropzone-icon,.dropzone.is-over .dropzone-icon{transform:scale(1.08)}.dropzone-text{font-weight:500}.dropzone-hint{font-size:12px;color:var(--ink-faint)}.source-info{margin:10px 0 0;font-size:12px;color:var(--ink-soft);word-break:break-all}.field{margin-bottom:16px}.field:last-child{margin-bottom:0}.field>label{display:flex;align-items:center;gap:6px;margin-bottom:7px;font-size:13px;font-weight:500}.field-hint{margin:6px 0 0;font-size:12px;color:var(--ink-faint)}.field.is-disabled>label,.field.is-disabled .chip-row{opacity:.45}select{width:100%;padding:8px 30px 8px 11px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M2.5 4.5L6 8l3.5-3.5' fill='none' stroke='%23667085' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") no-repeat right 10px center / 12px;appearance:none;font:inherit;color:var(--ink);transition:border-color .14s}select:hover{border-color:var(--border-strong)}select:focus-visible{outline:2px solid var(--accent);outline-offset:-1px;outline-offset:1px}input[type=range]{width:100%;appearance:none;height:22px;background:transparent;cursor:pointer}input[type=range]::-webkit-slider-runnable-track{height:4px;border-radius:999px;background:var(--border-strong)}input[type=range]::-webkit-slider-thumb{appearance:none;width:16px;height:16px;margin-top:-6px;border-radius:50%;background:var(--surface);border:2px solid var(--accent);box-shadow:var(--shadow-sm);transition:transform .12s}input[type=range]:hover::-webkit-slider-thumb{transform:scale(1.12)}input[type=range]::-moz-range-track{height:4px;border-radius:999px;background:var(--border-strong)}input[type=range]::-moz-range-thumb{width:12px;height:12px;border-radius:50%;background:var(--surface);border:2px solid var(--accent);box-shadow:var(--shadow-sm)}output{font-variant-numeric:tabular-nums;color:var(--accent);font-weight:700;background:var(--accent-soft);border-radius:999px;padding:0 8px;font-size:12px;line-height:20px}.chip-row{display:flex;flex-wrap:wrap;gap:6px;margin-top:9px}.chip{padding:4px 11px;font-size:12px;border-radius:8px;font-variant-numeric:tabular-nums}.chip:hover:not(.is-active){background:var(--surface-sunken)}.chip.is-active{box-shadow:0 1px 3px #4f46e566}.switch{display:flex;align-items:center;gap:9px;font-size:13px;cursor:pointer;margin-bottom:12px}.switch input{appearance:none;flex:none;width:34px;height:20px;margin:0;border-radius:999px;background:var(--border-strong);position:relative;cursor:pointer;transition:background .16s}.switch input:before{content:"";position:absolute;top:3px;left:3px;width:14px;height:14px;border-radius:50%;background:#fff;box-shadow:0 1px 2px #10182840;transition:left .16s}.switch input:checked{background:var(--accent)}.switch input:checked:before{left:17px}.switch input:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.stats{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:0 0 12px}.stats div{background:var(--surface-sunken);border-radius:var(--radius-sm);padding:8px 11px}.stats dt{font-size:11px;color:var(--ink-soft)}.stats dd{margin:2px 0 0;font-size:15px;font-weight:700;font-variant-numeric:tabular-nums;letter-spacing:-.01em}.timing{margin:0 0 12px;font-size:11px;color:var(--ink-faint);font-variant-numeric:tabular-nums}.export-row{display:grid;grid-template-columns:1fr 1fr;gap:8px}.export-row button{font-size:12px;padding:8px 6px;background:var(--surface-sunken);border-color:transparent;font-weight:500}.export-row button:hover:not(:disabled){background:var(--accent-soft)}.stage{display:flex;flex-direction:column;height:100%;min-height:480px;overflow:hidden}.stage-toolbar{display:flex;flex-wrap:wrap;align-items:center;gap:6px 10px;padding:9px 12px;border-bottom:1px solid var(--border);background:var(--surface);border-radius:var(--radius-lg) var(--radius-lg) 0 0}.toolbar-sep{width:1px;height:20px;background:var(--border)}.view-switch,.tool-switch,.brush-size,.history-actions,.zoom-actions,.major-switch{display:flex;align-items:center;gap:3px}.zoom-actions{margin-left:auto}.view-switch{background:var(--surface-sunken);border:1px solid var(--border);border-radius:10px;padding:3px}.view-switch button{border:none;background:transparent;border-radius:7px;padding:4px 12px;font-size:13px;color:var(--ink-soft)}.view-switch button:hover:not(.is-active){color:var(--ink);background:transparent;border-color:transparent}.view-switch button.is-active{background:var(--surface);color:var(--ink);font-weight:600;box-shadow:var(--shadow-sm)}.tool-switch{background:transparent}.tool-switch button{font-size:15px;padding:5px 9px;border-radius:var(--radius-sm)}.tool-switch button.is-active{background:var(--accent-soft);border-color:var(--accent);color:inherit}.tool-switch button svg,.brush-size button svg,.history-actions button svg,.zoom-actions button svg,.dropzone-icon svg{display:block;width:16px;height:16px}.tool-switch button{display:grid;place-items:center;padding:7px}.tool-switch button svg{width:17px;height:17px}.brush-size button,.history-actions button,.zoom-actions button{display:grid;place-items:center;padding:6px 8px}.zoom-actions button svg{width:15px;height:15px}.dropzone-icon svg{width:18px;height:18px}.major-switch button,.brush-size button,.history-actions button,.zoom-actions button{padding:4px 9px;font-variant-numeric:tabular-nums}.major-label{font-size:12px;color:var(--ink-soft);margin-right:2px}.brush-size span,.zoom-actions span{min-width:44px;text-align:center;font-size:12px;color:var(--ink-soft);font-variant-numeric:tabular-nums}.zoom-actions span{min-width:48px;background:var(--surface-sunken);border-radius:999px;padding:2px 0;color:var(--ink);font-weight:600}.canvas-wrap{flex:1;min-height:0;display:grid;place-items:center;padding:22px;overflow:auto;background:radial-gradient(circle,#c9d1de 1px,transparent 1.2px) 0 0 / 22px 22px,linear-gradient(180deg,#edf0f5,#e8ebf2)}#board{border-radius:8px;box-shadow:0 0 0 1px #10182814,0 2px 6px #1018281a,0 16px 40px -12px #10182847;image-rendering:pixelated;touch-action:none}#board.is-hidden{display:none}#board[data-tool=picker]{cursor:crosshair}#board[data-tool=fill]{cursor:cell}#board.is-panning{cursor:grab}#board.is-panning-active{cursor:grabbing}.board-holder{display:grid;grid-template-columns:22px auto;grid-template-rows:22px auto}.board-holder[hidden]{display:none}#board{grid-area:2 / 2}#ruler-top,#ruler-left{z-index:2;background:#f1f5f9}#ruler-top{grid-area:1 / 1 / 3 / 3;align-self:start;height:22px;position:sticky;top:0}#ruler-left{grid-area:1 / 1 / 3 / 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stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat left 9px center / 13px;border:1px solid var(--border);border-radius:var(--radius-sm);transition:border-color .14s}.palette-search input:hover{border-color:var(--border-strong)}.palette-search input:focus-visible{outline:2px solid var(--accent);outline-offset:-1px}#filter-empty{margin:10px 2px}.color-list{list-style:none;margin:10px 0 0;padding:0 2px 2px 0;overflow-y:auto;flex:1;display:grid;gap:2px;align-content:start}.color-list li{display:grid;grid-template-columns:26px minmax(0,1fr) auto;align-items:center;gap:10px;padding:6px 8px;border-radius:var(--radius-sm);cursor:pointer;border:1px solid transparent;transition:background .12s,border-color .12s,box-shadow .12s}.color-list li:hover{background:var(--surface-sunken)}.color-list li[hidden]{display:none}.color-list li.is-active{border-color:var(--accent);background:var(--accent-soft);box-shadow:0 1px 4px #4f46e52e}.color-list li.is-isolated{background:var(--accent-soft);box-shadow:inset 3px 0 0 var(--accent)}.color-list li.is-isolated .color-code{font-weight:700}.color-list.has-isolate li:not(.is-isolated){opacity:.55}.color-list.has-isolate li:not(.is-isolated):hover{opacity:1}.swatch{width:26px;height:26px;border-radius:8px;box-shadow:inset 0 0 0 1px #1018281f,inset 0 -4px 8px #10182814;display:grid;place-items:center;font-size:10px;font-family:ui-monospace,monospace;font-weight:600}.color-meta{min-width:0;line-height:1.3}.color-code{font-family:ui-monospace,monospace;font-size:12px;font-weight:600}.color-name{font-size:11px;color:var(--ink-soft);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.color-count{font-size:11px;color:var(--ink-soft);font-variant-numeric:tabular-nums;background:var(--surface-sunken);border-radius:999px;padding:2px 8px}.color-list li.is-active .color-count{background:var(--surface);color:var(--accent);font-weight:600}.panel::-webkit-scrollbar,.color-list::-webkit-scrollbar,.canvas-wrap::-webkit-scrollbar{width:8px;height:8px}.panel::-webkit-scrollbar-thumb,.color-list::-webkit-scrollbar-thumb,.canvas-wrap::-webkit-scrollbar-thumb{background:#66708547;border-radius:999px}.panel::-webkit-scrollbar-thumb:hover,.color-list::-webkit-scrollbar-thumb:hover,.canvas-wrap::-webkit-scrollbar-thumb:hover{background:#66708573}.panel::-webkit-scrollbar-track,.color-list::-webkit-scrollbar-track,.canvas-wrap::-webkit-scrollbar-track{background:transparent}@media(max-width:1180px){.layout{grid-template-columns:300px minmax(0,1fr);height:auto}.stage{height:calc(100vh - var(--topbar-h) - 31px)}.palette-panel{grid-column:1 / -1;max-height:260px}.color-list{grid-template-columns:repeat(auto-fill,minmax(180px,1fr));overflow-y:visible}}@media(max-width:820px){.layout{grid-template-columns:1fr;padding:12px}.panel{overflow:visible}.stage{height:auto;min-height:60vh}.stage-toolbar{gap:6px 10px;padding:8px 10px}.stage-toolbar .toolbar-sep{display:none}.stage-toolbar button{min-height:36px}.view-switch button,.tool-switch button{padding:5px 9px}.major-switch button{min-width:34px}.canvas-wrap{padding:12px;min-height:300px}.chip{padding:7px 12px}.topbar{height:auto;padding:10px 12px;gap:10px}.topbar-actions button{white-space:nowrap}.brand p{display:none}}