*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{color-scheme:dark;--bg: #141414;--surface: #181818;--border: #e4e4e433;--text: #e4e4e4eb;--text-muted: #e4e4e48d;--accent: #599ce7;--accent-hover: #6aabe9}html,body{height:100%;overflow:hidden}body{font-family:system-ui,-apple-system,Segoe UI,sans-serif;background:var(--bg);color:var(--text)}#app{display:flex;flex-direction:column;height:100dvh;overflow:hidden}.toolbar{display:flex;flex-wrap:wrap;align-items:center;gap:16px;padding:12px 16px;border-bottom:1px solid var(--border);background:var(--surface)}.toolbar h1{font-size:18px;font-weight:600;margin-right:8px}.shape-picker{display:flex;gap:6px}.shape-btn,.actions button{font:inherit;font-size:13px;padding:6px 12px;border-radius:6px;border:1px solid var(--border);background:transparent;color:var(--text);cursor:pointer;transition:background .12s,border-color .12s}.shape-btn:hover,.actions button:hover{background:#e4e4e411}.shape-btn.active{border-color:var(--accent);background:#599ce733;color:var(--accent)}.actions{display:flex;gap:8px;margin-left:auto}.canvas-wrap{flex:1;display:flex;flex-direction:column;min-height:0;padding:16px;gap:8px}#canvas{flex:1;width:100%;min-height:0;border:1px solid var(--border);border-radius:8px;background:var(--surface);cursor:crosshair;touch-action:none}.hint{font-size:12px;color:var(--text-muted)}