:root{--navy:#0b1368;--ink:#1f2937;--muted:#6b7280;--line:#d8dde7;--bg:#f5f7fb;--white:#fff;--red:#b42318;--blue:#155eef}*{box-sizing:border-box}html,body{margin:0;height:100%;font-family:Arial,Helvetica,sans-serif;color:var(--ink);background:var(--bg)}body{display:flex;flex-direction:column}.topbar{display:flex;justify-content:space-between;gap:20px;align-items:center;padding:18px 24px;background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}.eyebrow{font-size:11px;letter-spacing:.16em;font-weight:700;color:var(--navy)}h1{font-size:22px;margin:4px 0}.identity{font-size:13px;color:var(--muted)}.top-actions{display:flex;align-items:center;gap:12px}.status{font-size:12px;color:var(--muted)}button{font:inherit;border:1px solid var(--line);background:#fff;border-radius:10px;padding:10px 14px;cursor:pointer;color:var(--ink)}button:hover{background:#f8fafc}button.active{border-color:var(--navy);color:var(--navy);box-shadow:inset 0 0 0 1px var(--navy)}button.primary{background:var(--navy);border-color:var(--navy);color:#fff;font-weight:700}.danger-ghost{color:var(--red)}main{width:min(1500px,100%);margin:0 auto;padding:18px 20px 30px}.sections{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-bottom:12px}.sections button{font-weight:700}.workspace-shell{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;box-shadow:0 4px 18px rgba(15,23,42,.05);position:relative}.toolbar{display:flex;flex-wrap:wrap;gap:7px;padding:10px;border-bottom:1px solid var(--line)}.palette{border-bottom:1px solid var(--line);background:#f8faff;padding:12px}.palette-head{display:flex;align-items:center;gap:14px;margin-bottom:10px}.palette-head strong{font-size:14px;color:var(--navy)}.palette-head span{font-size:12px;color:var(--muted);flex:1}.palette-head button{padding:3px 9px;font-size:20px}.palette-items{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:8px}.palette-item{display:flex;align-items:center;justify-content:center;min-height:54px;background:#fff;border:1px solid #cfd5e1;border-radius:10px;padding:8px;font-size:18px;font-weight:600;cursor:grab;text-align:center;user-select:none}.palette-item small{display:block;font-size:10px;font-weight:400;color:var(--muted)}.palette-item:active{cursor:grabbing}.canvas-wrap{position:relative;height:calc(100vh - 240px);min-height:480px;background:#fff}.canvas-wrap canvas{width:100%;height:100%;display:block;touch-action:none;cursor:crosshair}.canvas-wrap.select-mode canvas{cursor:default}.hint{padding:8px 12px;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}.toast{position:fixed;right:24px;bottom:24px;max-width:420px;padding:14px 16px;background:#111827;color:#fff;border-radius:10px;box-shadow:0 8px 30px rgba(0,0,0,.2);z-index:30}@media(max-width:720px){.topbar{align-items:flex-start;padding:14px}.top-actions{flex-direction:column;align-items:flex-end}.status{display:none}main{padding:10px}.toolbar button{padding:8px 10px;font-size:13px}.palette-items{grid-template-columns:repeat(3,1fr)}.canvas-wrap{height:calc(100vh - 285px);min-height:400px}h1{font-size:18px}}