:root{--bg: #000005;--surface: #0f0f1a;--surface2: #181828;--border: #252540;--text: #d8d8f0;--text-dim: #777999;--accent: #6a7eff;--accent2: #ff7eb3;--radius: 6px;--sidebar-w: 280px}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Segoe UI,system-ui,sans-serif;font-size:13px;background:var(--bg);color:var(--text);height:100vh;overflow:hidden}.app{display:flex;height:100vh}.canvas-area{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;background:var(--bg);position:relative}.canvas-area canvas{border-radius:var(--radius);box-shadow:0 0 80px #5064ff1f}.hint{position:absolute;bottom:16px;color:var(--text-dim);font-size:11px;opacity:.5}.sidebar{width:var(--sidebar-w);background:var(--surface);border-left:1px solid var(--border);overflow-y:auto;display:flex;flex-direction:column;gap:0;padding-bottom:24px}.sidebar-section{padding:12px 14px;border-bottom:1px solid var(--border);display:flex;flex-direction:column;gap:8px}.section-label{font-size:10px;text-transform:uppercase;letter-spacing:.08em;color:var(--text-dim);font-weight:600}select{width:100%;background:var(--surface2);color:var(--text);border:1px solid var(--border);border-radius:var(--radius);padding:6px 8px;font-size:13px;cursor:pointer;outline:none}select:focus{border-color:var(--accent)}.control-row{display:flex;align-items:center;gap:6px;width:100%}.control-label{flex:0 0 72px;font-size:11px;color:var(--text-dim);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.control-row input[type=range]{flex:1;accent-color:var(--accent);height:2px;cursor:pointer}.control-value{flex:0 0 38px;text-align:right;font-size:11px;color:var(--text-dim);font-variant-numeric:tabular-nums}.control-toggle input[type=checkbox]{accent-color:var(--accent);cursor:pointer;width:14px;height:14px}.btn{width:100%;padding:7px 10px;background:var(--surface2);color:var(--text);border:1px solid var(--border);border-radius:var(--radius);cursor:pointer;font-size:12px;text-align:left;transition:border-color .15s,background .15s}.btn:hover{border-color:var(--accent);background:#1a1a38}.btn:active{background:#222248}.btn:disabled{opacity:.4;cursor:default}.btn-small{padding:3px 6px;background:var(--surface2);color:var(--text-dim);border:1px solid var(--border);border-radius:4px;cursor:pointer;font-size:12px;line-height:1;flex-shrink:0}.btn-small:hover{border-color:var(--accent);color:var(--text)}.palette-row{display:flex;align-items:center;gap:8px;padding:4px 6px;border-radius:4px;cursor:pointer;border:1px solid transparent;transition:background .1s,border-color .1s}.palette-row:hover{background:#ffffff0a}.palette-row--active{border-color:var(--accent);background:#6a7eff14}.palette-label{flex:0 0 68px;font-size:11px;color:var(--text-dim)}.color-row{display:flex;gap:4px;align-items:center}.color-swatch{width:20px;height:20px;border-radius:4px;border:1px solid rgba(255,255,255,.12);position:relative;flex-shrink:0;transition:transform .1s}.color-swatch:hover{transform:scale(1.15);border-color:#fff}.sidebar-export{gap:6px}.sidebar-export .control-label{flex:0 0 72px}.sidebar::-webkit-scrollbar{width:4px}.sidebar::-webkit-scrollbar-track{background:transparent}.sidebar::-webkit-scrollbar-thumb{background:var(--border);border-radius:2px}@media (max-width: 720px){body{overflow:auto}.app{flex-direction:column;height:auto;min-height:100%;overflow:visible}.canvas-area{flex:none;padding:24px 0 16px}.canvas-area canvas{width:min(400px,90vw)!important;height:min(400px,90vw)!important}.sidebar{width:100%;border-left:none;border-top:1px solid var(--border);overflow-y:visible;max-height:none}}