*{box-sizing:border-box}body{margin:0;font:14px system-ui,Segoe UI,sans-serif;background:#eef1f5;color:#17202a}header{height:58px;background:#fff;border-bottom:1px solid #d9dee7;display:flex;align-items:center;gap:12px;padding:0 18px}header strong{font-size:18px}header span{color:#6b7280;margin-right:auto}button{border:1px solid #ccd3dd;background:#fff;border-radius:7px;padding:9px 12px;cursor:pointer}button:hover{background:#f5f7fa}button:disabled{opacity:.45;cursor:not-allowed}main{height:calc(100vh - 58px);display:grid;grid-template-columns:160px 1fr;grid-template-rows:1fr 48px}aside{background:#fff;border-right:1px solid #d9dee7;padding:12px;display:flex;flex-direction:column;gap:8px}aside button{text-align:left}.hint{font-size:12px;color:#6b7280;line-height:1.45;margin-top:8px}.workspace{overflow:auto;padding:30px;display:flex;justify-content:center;align-items:flex-start}#stage{position:relative;background:white;box-shadow:0 5px 24px #0002}#pdfCanvas{display:block}#overlay{position:absolute;inset:0}.item{position:absolute;min-width:14px;min-height:14px;cursor:move;user-select:none;border:1px solid transparent;padding:1px 3px;white-space:pre}.item.selected{border:1px dashed #2563eb;background:#dbeafe44}.item.tick{font-family:Arial,sans-serif;font-weight:bold;padding:0;line-height:1}.item.image img{width:100%;height:100%;display:block;pointer-events:none}.resize{position:absolute;width:9px;height:9px;right:-5px;bottom:-5px;background:#2563eb;border-radius:50%;cursor:nwse-resize}nav{grid-column:2;background:#fff;border-top:1px solid #d9dee7;display:flex;align-items:center;justify-content:center;gap:14px}
