:root{--bg: #16161a;--panel: #1c1c22;--panel-2: #23232b;--border: #2c2c34;--text: #e5e7eb;--muted: #9aa0aa;--accent: #6ea8fe;--accent-2: #3b82f6;--danger: #f87171}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased}.app{display:flex;height:100vh;overflow:hidden}.sidebar{width:268px;flex:0 0 268px;background:var(--panel);border-right:1px solid var(--border);display:flex;flex-direction:column;overflow-y:auto}.brand{display:flex;align-items:center;gap:10px;padding:16px 16px 14px;border-bottom:1px solid var(--border)}.brand-dot{width:14px;height:14px;border-radius:3px;background:linear-gradient(135deg,#6ea8fe,#b39dff);box-shadow:0 0 12px #6ea8fe99}.brand-title{font-weight:700;font-size:15px;letter-spacing:.3px}.brand-sub{font-size:11px;color:var(--muted)}.panel-head{display:flex;align-items:center;gap:8px;font-size:12px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.6px;padding:12px 16px 8px}.palette-wrap{display:flex;flex-direction:column;flex:1 1 auto;min-height:0}.current-chip{width:16px;height:16px;border-radius:3px;border:1px solid rgba(255,255,255,.25)}.current-idx{font-size:11px;color:var(--text)}.palette{display:grid;grid-template-columns:repeat(8,1fr);gap:3px;padding:0 12px 12px;overflow-y:auto;align-content:start}.swatch{aspect-ratio:1 / 1;border:1px solid rgba(255,255,255,.08);border-radius:3px;padding:0;cursor:pointer;transition:transform .06s ease}.swatch:hover{transform:scale(1.12)}.swatch.selected{border:2px solid #fff;box-shadow:0 0 0 2px var(--accent-2)}.info{border-top:1px solid var(--border);padding-bottom:14px}.info-row{display:flex;justify-content:space-between;align-items:center;font-size:12px;padding:4px 16px;color:var(--muted)}.info-row b{color:var(--text);font-weight:600}.info-row b.inline{display:flex;align-items:center;gap:6px}.info-chip{width:14px;height:14px;border-radius:3px;border:1px solid rgba(255,255,255,.25)}.viewport{flex:1 1 auto;display:flex;flex-direction:column;min-width:0}.toolbar{display:flex;align-items:center;gap:16px;flex-wrap:wrap;padding:10px 14px;background:var(--panel);border-bottom:1px solid var(--border)}.tool-group{display:flex;align-items:center;gap:8px}.tool-right{margin-left:auto;justify-content:flex-end}.filename{font-size:12px;color:var(--text);background:var(--panel-2);border:1px solid var(--border);padding:4px 10px;border-radius:6px;max-width:200px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.hint{font-size:11px;color:var(--muted)}.btn{font-size:13px;color:var(--text);background:var(--panel-2);border:1px solid var(--border);padding:6px 12px;border-radius:6px;cursor:pointer;transition:background .12s ease,border-color .12s ease}.btn:hover:not(:disabled){background:#2c2c36;border-color:#3a3a46}.btn:disabled{opacity:.4;cursor:not-allowed}.btn.active{border-color:var(--accent-2);color:#fff;background:#3b82f62e}.export-select{font-size:13px;color:var(--text);background:var(--panel-2);border:1px solid var(--border);padding:6px 10px;border-radius:6px;cursor:pointer;transition:border-color .12s ease}.export-select:focus{outline:none;border-color:var(--accent-2)}.export-select:hover{background:#2c2c36;border-color:#3a3a46}.seg{display:inline-flex;border:1px solid var(--border);border-radius:6px;overflow:hidden}.seg-btn{font-size:13px;color:var(--muted);background:var(--panel-2);border:none;padding:6px 14px;cursor:pointer}.seg-btn.active{background:var(--accent-2);color:#fff}.canvas-wrap{position:relative;flex:1 1 auto;min-height:0;overflow:hidden}.canvas-wrap canvas{display:block}.backend-badge{position:absolute;top:10px;right:12px;z-index:5;font-size:11px;font-weight:600;letter-spacing:.4px;padding:3px 9px;border-radius:999px;border:1px solid var(--border);background:#16161ab8;color:var(--muted);pointer-events:none;-webkit-user-select:none;user-select:none}.backend-badge.webgpu{color:#b9f6ca;border-color:#69f0ae80;background:#0d281cb8}.backend-badge.webgl{color:#ffd180;border-color:#ffb26680;background:#2e200db8}.layers-panel{border-top:1px solid var(--border);padding-bottom:8px}.layers-panel .panel-head{display:flex;align-items:center;justify-content:space-between}.btn-sm{font-size:11px;padding:3px 8px;border-radius:5px}.layer-list{display:flex;flex-direction:column;gap:4px;padding:0 12px}.layer-empty{font-size:12px;color:var(--muted);padding:6px 4px}.layer-item{display:grid;grid-template-columns:22px 1fr auto auto;grid-template-areas:"eye name count ops" "eye opacity opacity opacity";align-items:center;gap:4px 6px;padding:6px 8px;background:var(--panel-2);border:1px solid var(--border);border-radius:6px;cursor:pointer}.layer-item.active{border-color:var(--accent-2);background:#3b82f61f}.layer-item .eye{grid-area:eye;width:22px;height:22px;font-size:12px;border:1px solid var(--border);background:transparent;color:var(--muted);border-radius:5px;cursor:pointer}.layer-item .eye.on{color:var(--text)}.layer-name{grid-area:name;font-size:12px;color:var(--text);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.layer-name-input{grid-area:name;font-size:12px;color:var(--text);background:var(--bg);border:1px solid var(--accent-2);border-radius:4px;padding:2px 4px}.layer-count{grid-area:count;font-size:11px;color:var(--muted)}.layer-ops{grid-area:ops;display:flex;gap:2px}.layer-op{width:20px;height:20px;font-size:11px;line-height:1;border:1px solid var(--border);background:transparent;color:var(--muted);border-radius:4px;cursor:pointer;padding:0}.layer-op:hover:not(:disabled){color:var(--text);border-color:#3a3a46}.layer-op:disabled{opacity:.3;cursor:not-allowed}.layer-opacity{grid-area:opacity;width:100%;accent-color:var(--accent-2);cursor:pointer}.layer-hint{font-size:10px;color:var(--muted);padding:6px 12px 0}.seg.csg{gap:0}.csg-select{font-size:13px;color:var(--text);background:var(--panel-2);border:none;border-right:1px solid var(--border);padding:6px 10px;cursor:pointer}.csg-select:focus{outline:none}