body{margin:0;background:#0b0f14;color:#e6edf3;font-family:system-ui}
.topbar{padding:12px;border-bottom:1px solid #223047}
.controls{display:flex;gap:8px;flex-wrap:wrap}
input,select,button{background:#121826;color:#e6edf3;border:1px solid #223047;border-radius:8px;padding:6px}
button{background:#4cc9f0;color:#041019;font-weight:700;border:none}
.layout{padding:10px}
.chart-wrap{border:1px solid #223047;border-radius:12px;overflow:hidden;background:#0f1522}
#chart{height:60vh;min-height:320px}
.status{padding:8px 10px;color:#93a4b8;font-size:12px;border-top:1px solid #223047;white-space:pre-line}