.wb-builder {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  font-family: sans-serif;
}
.wb-panel { flex: 1; min-width: 320px; }
.wb-row { margin-bottom: 10px; }
.wb-row label { display:inline-block; width:100px; }
.wb-wheel-block { border-bottom: 1px solid #ddd; margin-bottom: 15px; padding-bottom: 10px; }
.wb-buttons { margin-top: 12px; display: flex; gap: 8px; flex-wrap: wrap; }
.wb-buttons button { padding: 6px 12px; border:1px solid #ccc; background:#f5f5f5; cursor:pointer; border-radius:4px; }
.wb-buttons button:hover { background:#e8e8e8; }
canvas { display: block; margin: auto; border-radius: 8px; }