body{margin:0;background:#0b0f14;color:#e6eef7;font-family:system-ui}
.topbar{padding:10px;display:flex;justify-content:space-between;align-items:center}
.brand{display:flex;gap:8px;align-items:center}
.dot{width:10px;height:10px;background:#3aa3ff;border-radius:50%}
.seg button{margin:2px;padding:8px;border-radius:6px;border:none;background:#1c2530;color:#e6eef7}
.seg button.on{background:#3aa3ff}
.chartWrap{position:relative;height:80vh}
#chart{position:absolute;inset:0}
#overlay{position:absolute;inset:0}