:root{--ink:#1c1c1c;--ink2:#555;--ink3:#9a9a9a;--line:#e2e2e2;--bg:#fafafa;--panel:#ffffff}*{box-sizing:border-box;margin:0;padding:0}html,body,#app{height:100%}body{font:13px/1.45 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--ink);background:var(--bg);overflow:hidden}#app{display:flex;flex-direction:column}.topbar{display:flex;align-items:center;gap:6px;padding:8px 12px;background:var(--panel);border-bottom:1px solid var(--line);-webkit-user-select:none;user-select:none}.brand{font-weight:700;letter-spacing:.4px;margin-right:10px;font-size:14px}.brand span{color:var(--ink3);font-weight:400}.tb-sep{width:1px;height:22px;background:var(--line);margin:0 4px}button,.btn{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:7px;padding:5px 10px;font:inherit;cursor:pointer;display:inline-flex;align-items:center;gap:6px}button:hover,.btn:hover{border-color:#bbb}button.active{background:var(--ink);color:#fff;border-color:var(--ink)}button:disabled{opacity:.4;cursor:default}.tb-right{margin-left:auto;display:flex;align-items:center;gap:6px}.save-note{color:var(--ink3);font-size:12px;margin-right:4px}.zoom-label{min-width:44px;text-align:center;color:var(--ink2)}.main{display:flex;flex:1;min-height:0}.palette{width:232px;background:var(--panel);border-right:1px solid var(--line);overflow-y:auto;padding:10px}.palette h3{font-size:11px;text-transform:uppercase;letter-spacing:.8px;color:var(--ink3);margin:4px 0 8px}.palette details{margin-bottom:10px}.palette summary{cursor:pointer;font-weight:600;padding:5px 4px;border-radius:6px;list-style:none;display:flex;align-items:center}.palette summary:before{content:"▸";color:var(--ink3);margin-right:6px;font-size:10px;transition:transform .12s}.palette details[open] summary:before{transform:rotate(90deg)}.palette summary:hover{background:#f2f2f2}.pal-grid{display:grid;grid-template-columns:1fr 1fr;gap:6px;padding:6px 0 2px}.pal-item{border:1px solid var(--line);border-radius:8px;background:#fff;padding:6px 4px 5px;display:flex;flex-direction:column;align-items:center;gap:3px;cursor:grab;text-align:center}.pal-item:hover{border-color:#aaa;box-shadow:0 1px 3px #0000000f}.pal-item:active{cursor:grabbing}.pal-item .nm{font-size:11px;line-height:1.2}.pal-item .dm{font-size:10px;color:var(--ink3)}.thumb{width:64px;height:40px;pointer-events:none}.canvas-wrap{flex:1;position:relative;min-width:0;background:#fff}.canvas-wrap svg{display:block;width:100%;height:100%;touch-action:none;user-select:none;-webkit-user-select:none}.canvas-wrap svg.tool-wall{cursor:crosshair}.canvas-wrap svg.tool-marquee{cursor:crosshair}.pal-search{width:100%;padding:6px 10px;margin-bottom:10px;border:1px solid var(--line);border-radius:7px;font:inherit;background:#fff}.pal-search:focus{outline:none;border-color:#999}.pal-none{color:var(--ink3);font-size:12px;padding:8px 2px}.canvas-wrap svg.panning{cursor:grabbing}.hintbar{position:absolute;left:50%;bottom:14px;transform:translate(-50%);background:#1c1c1cd9;color:#fff;padding:6px 14px;border-radius:20px;font-size:12px;pointer-events:none;white-space:nowrap}.scalebar{position:absolute;right:16px;bottom:14px;color:var(--ink2);font-size:11px;text-align:center;pointer-events:none}.scalebar .bar{height:4px;border:1px solid var(--ink2);border-top:none;margin-top:2px}.props{width:236px;background:var(--panel);border-left:1px solid var(--line);overflow-y:auto;padding:12px}.props h3{font-size:13px;margin-bottom:2px}.props .sub{color:var(--ink3);font-size:11px;margin-bottom:12px}.fld{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px;gap:8px}.fld label{color:var(--ink2);font-size:12px;white-space:nowrap}.fld input,.fld select{width:104px;padding:4px 7px;border:1px solid var(--line);border-radius:6px;font:inherit;text-align:right;background:#fff}.fld input:focus{outline:none;border-color:#999}.row-btns{display:flex;gap:6px;flex-wrap:wrap;margin:10px 0}.row-btns button{flex:1;justify-content:center;font-size:12px}.danger{color:#b23b3b}.swatches{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:8px}.sw{width:22px;height:22px;border-radius:6px;border:1px solid rgba(0,0,0,.15);cursor:pointer}.sw.on{outline:2px solid var(--ink);outline-offset:1px}.color-pick{width:104px;height:28px;padding:2px;border:1px solid var(--line);border-radius:6px;background:#fff;cursor:pointer}.callout-text{width:100%;padding:6px 8px;border:1px solid var(--line);border-radius:6px;font:inherit;resize:vertical;margin-bottom:4px;background:#fff}.callout-text:focus{outline:none;border-color:#999}.ctxmenu{position:absolute;z-index:20;min-width:160px;background:#fff;border:1px solid var(--line);border-radius:9px;box-shadow:0 6px 20px #0000001f;padding:4px;display:flex;flex-direction:column}.ctxmenu button{border:none;border-radius:6px;justify-content:flex-start;padding:6px 10px;width:100%}.ctxmenu button:hover{background:#f2f2f2}.ctx-sep{height:1px;background:var(--line);margin:4px 6px}.props .empty{color:var(--ink3);font-size:12px;padding-top:8px}.kbd{border:1px solid var(--line);border-radius:4px;padding:0 4px;font-size:11px;background:#f5f5f5}.help{margin-top:14px;border-top:1px solid var(--line);padding-top:10px;color:var(--ink2);font-size:11.5px}.help p{margin-bottom:5px}