:root{--bg:#0f1114;--surface:#1a1d23;--border:#2a2f38;--text:#e8eaed;--text-muted:#9aa0a8;--accent:#5b9cf5;--accent-dim:#5b9cf540;--highlight:#7ee787;--danger:#f85149;--radius:6px;--panel-width:260px;--surface-raised:#22262e}*,*:before,*:after{box-sizing:border-box}html,body{color:var(--text);background:var(--bg);height:100%;margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Noto Sans,Ubuntu,Cantarell,Helvetica Neue,sans-serif;font-size:14px}#app{display:flex;flex-direction:column;height:100vh}.toolbar{display:flex;border-bottom:1px solid var(--border);background:var(--surface);flex-shrink:0;align-items: center;gap:8px;padding:10px 14px}.toolbar .btn-ghost{margin-left:auto}.btn-ghost.active{border-color:var(--accent);color:var(--accent);background:var(--accent-dim)}.btn{display:inline-flex;border:1px solid var(--border);border-radius:var(--radius);background:var(--bg);color:var(--text);cursor:pointer;align-items: center;padding:6px 12px;transition:border-color .15s,background .15s;font-size:13px}.btn:hover:not(:disabled){border-color:var(--accent)}.btn:disabled{opacity:.4;cursor:not-allowed}.btn-primary{background:var(--accent);border-color:var(--accent);color:#0f1114;font-weight:500}.btn-primary:hover{filter:brightness(1.08)}.workspace{display:flex;flex:1;min-height:0}.layer-panel{width:var(--panel-width);border-right:1px solid var(--border);background:var(--surface);display:flex;overflow:hidden;flex-direction:column;flex-shrink:0}.layer-panel[hidden]{display:none}.layer-panel-header{text-transform:uppercase;letter-spacing:.06em;color:var(--text-muted);border-bottom:1px solid var(--border);background:var(--surface);flex-shrink:0;padding:10px 14px;font-size:11px;font-weight:600}.layer-tree{overflow:auto;scrollbar-width:thin;scrollbar-color:var(--border)transparent;flex:1;padding:8px}.layer-tree::-webkit-scrollbar{width:8px}.layer-tree::-webkit-scrollbar-track{background:0 0}.layer-tree::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}.layer-tree::-webkit-scrollbar-thumb:hover{background:#3d4450}.layer-tree-empty{color:var(--text-muted);text-align:center;margin:0;padding:16px 10px;font-size:12px;line-height:1.5}.layer-tree-root,.layer-tree ul{list-style:none;margin:0;padding:0}.layer-node{margin:0}.layer-children{border-left:1px solid var(--border);overflow:hidden;margin-left:6px;padding-left:10px;transition:max-height .2s,opacity .15s}.layer-children.collapsed{display:none}.layer-item{display:flex;border-radius:var(--radius);cursor:pointer;align-items: center;gap:4px;margin:1px 0;padding:2px 4px 2px 2px;transition:background .12s}.layer-item:hover{background:var(--surface-raised)}.layer-item.selected{background:var(--accent-dim);box-shadow:inset 2px 0 0 var(--accent)}.layer-item.hovered:not(.selected){box-shadow:inset 2px 0 0 var(--highlight);background:#7ee78714}.layer-chevron,.layer-chevron-spacer{flex-shrink:0;width:20px;height:20px}.layer-chevron-spacer{display:block}.layer-chevron{display:flex;color:var(--text-muted);cursor:pointer;background:0 0;border:none;border-radius:4px;justify-content:center;align-items: center;padding:0;transition:color .12s,background .12s,transform .15s}.layer-chevron:hover{background:var(--bg);color:var(--text)}.layer-chevron.collapsed{transform:rotate(-90deg)}.layer-item-body{display:flex;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex:1;align-items:baseline;gap:0;min-width:0;padding:4px 6px 4px 0;font-family:ui-monospace,Cascadia Code,SF Mono,Menlo,monospace;font-size:12px;line-height:1.35}.layer-tag{color:var(--accent);flex-shrink:0;font-weight:500}.layer-id{color:var(--text);overflow:hidden;text-overflow:ellipsis;flex-shrink:1}.layer-class{color:var(--text-muted);overflow:hidden;text-overflow:ellipsis;flex-shrink:1}.layer-item.selected 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6px}.drop-zone-hint{opacity:.7;font-size:12px}.canvas-area.drag-over .drop-zone{border-color:var(--accent);color:var(--accent)}.canvas{display:flex;overflow:auto;justify-content:center;align-items: center;width:100%;height:100%;padding:24px}.canvas svg{display:block;max-width:100%;max-height:100%}.canvas svg [data-dissect-id].dissect-hover{outline:2px solid var(--highlight);outline-offset:1px}.canvas svg [data-dissect-id].dissect-selected{outline:2px solid var(--accent);outline-offset:1px}.canvas svg [data-dissect-id].dissect-dragging{cursor:grabbing}.error-toast{position:absolute;background:var(--danger);color:#fff;border-radius:var(--radius);max-width:90%;padding:10px 16px;font-size:13px;bottom:16px;left:50%;transform:translate(-50%)}.tooltip{position:fixed;z-index:1000;pointer-events:none;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);max-width:320px;padding:6px 10px;font-family:ui-monospace,monospace;font-size:12px;line-height:1.5;box-shadow:0 4px 12px #0006}.tooltip .tooltip-tag{color:var(--accent);font-weight:600}.tooltip .tooltip-meta{color:var(--text-muted)}.context-menu{position:fixed;z-index:1001;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);min-width:140px;padding:4px;box-shadow:0 4px 16px #00000073}.context-menu button{display:block;color:var(--text);text-align:left;cursor:pointer;background:0 0;border:none;border-radius:4px;width:100%;padding:8px 12px;font-size:13px}.context-menu button:hover:not(:disabled){background:var(--accent-dim)}.context-menu button:disabled{opacity:.4;cursor:not-allowed}