*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:#0f0f0f;color:#fff}code{font-family:Courier New,Courier,monospace}#root{height:100vh}.app{display:flex;flex-direction:column;height:100vh;padding:20px;background-color:#0f0f0f}.header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;padding:20px;background-color:#1a1a1a;border-radius:8px;border:1px solid #333}.header h1{font-size:24px;color:#fff}.connection-status{display:flex;align-items:center;gap:10px}.status-indicator{width:12px;height:12px;border-radius:50%;background-color:#f44}.status-indicator.connected{background-color:#4f4}.status-indicator.connecting{background-color:#fa4;animation:pulse 1s infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.performance-stats{display:flex;gap:20px;margin-bottom:20px;padding:15px;background-color:#1a1a1a;border-radius:8px;border:1px solid #333;flex-wrap:wrap}.stat-item{display:flex;flex-direction:column;align-items:center;gap:5px;min-width:120px}.stat-label{font-size:12px;color:#888;text-transform:uppercase}.stat-value{font-size:18px;font-weight:700;color:#fff}.depth-toggle{background:#4CAF50;color:#fff;border:none;padding:8px 12px;border-radius:4px;cursor:pointer;font-size:12px;font-weight:700;transition:background-color .2s ease}.depth-toggle:hover{opacity:.8}.depth-toggle.limited{background:#ff9800}.level-select{background:#333;color:#fff;border:1px solid #555;padding:6px 8px;border-radius:4px;cursor:pointer;font-size:12px;font-weight:700;min-width:60px}.level-select:hover{background:#444}.level-select:focus{outline:none;border-color:#4caf50}.orderbook-container{flex:1;display:flex;gap:20px;min-height:0}.orderbook-side{flex:1;background-color:#1a1a1a;border-radius:8px;border:1px solid #333;overflow:hidden;display:flex;flex-direction:column}.side-header{padding:15px;background-color:#2a2a2a;border-bottom:1px solid #333;text-align:center;font-weight:700;text-transform:uppercase}.side-header.bids{color:#4caf50}.side-header.asks{color:#f44336}.orderbook-headers{display:grid;grid-template-columns:1fr 1fr 1fr;padding:10px 15px;background-color:#2a2a2a;border-bottom:1px solid #333;font-size:12px;color:#888;text-transform:uppercase}.orderbook-list{flex:1;overflow-y:auto}.order-row{display:grid;grid-template-columns:1fr 1fr 1fr;padding:4px 15px;font-family:Courier New,monospace;font-size:13px;border-bottom:1px solid #333;position:relative;transition:background-color .2s ease}.order-row:hover{background-color:#2a2a2a}.order-row.updated{background-color:#ffff001a;animation:highlight .5s ease-out}@keyframes highlight{0%{background-color:#ffff004d}to{background-color:transparent}}.order-price{text-align:left}.order-price.bid{color:#4caf50}.order-price.ask{color:#f44336}.order-size{text-align:right;color:#fff}.order-total{text-align:right;color:#888}@media (max-width: 768px){.app{padding:10px}.orderbook-container{flex-direction:column}.performance-stats{flex-wrap:wrap}.header{flex-direction:column;gap:15px;text-align:center}}