:root {
  --bg: #0f1419;
  --panel: #1a212b;
  --panel-border: #2a3441;
  --text: #e6edf3;
  --muted: #9aa7b4;
  --accent: #4cc2ff;
  --accent-press: #2aa3e0;
  --warn: #d29922;
  --bad: #f85149;
  --good: #3fb950;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.5;
}

header, main, footer { max-width: 1120px; margin: 0 auto; padding: 0 20px; }
header { padding-top: 32px; }

h1 { margin: 0 0 8px; font-size: 1.85rem; }
.subtitle { color: var(--muted); max-width: 90ch; }
.subtitle a { color: var(--accent); }

.repo-link { margin: 6px 0 0; font-size: 0.85rem; }
.repo-link a { display: inline-flex; align-items: center; gap: 6px; color: var(--muted); text-decoration: none; }
.repo-link a:hover { color: var(--accent); }
.repo-link svg { display: block; }

.status {
  display: inline-block; margin-top: 8px; padding: 6px 12px;
  border-radius: 999px; font-size: 0.85rem; font-weight: 600;
}
.status--loading { background: #3a2f12; color: var(--warn); }
.status--ready   { background: #12331c; color: var(--good); }
.status--busy    { background: #12283a; color: var(--accent); }
.status--error   { background: #3a1414; color: var(--bad); }

main { margin-top: 24px; display: flex; flex-direction: column; gap: 20px; }

.panel {
  background: var(--panel); border: 1px solid var(--panel-border);
  border-radius: 12px; padding: 20px;
}
.panel h2 { margin: 0 0 6px; font-size: 1.2rem; }
.muted { color: var(--muted); }
.small { font-size: 0.86rem; }
code { color: var(--accent); background: #0f1620; padding: 0 4px; border-radius: 4px; }

.controls { display: flex; flex-wrap: wrap; gap: 14px; align-items: flex-end; margin: 14px 0; }
.field { margin: 0; }
.field.grow { flex: 1; min-width: 220px; }
.field label { display: block; font-size: 0.82rem; font-weight: 600; margin-bottom: 6px; }
input[type="number"], select {
  background: #0f1620; border: 1px solid var(--panel-border); color: var(--text);
  border-radius: 8px; padding: 8px 10px; font-size: 0.95rem; width: 150px;
}
input[type="range"] { width: 100%; accent-color: var(--accent); }
output { font-variant-numeric: tabular-nums; color: var(--accent); font-weight: 600; }

.segmented { display: inline-flex; border: 1px solid var(--panel-border); border-radius: 8px; overflow: hidden; }
.seg-btn {
  font: inherit; font-weight: 600; padding: 8px 14px; border: 0; cursor: pointer;
  background: #0f1620; color: var(--muted); border-right: 1px solid var(--panel-border);
}
.seg-btn:last-child { border-right: 0; }
.seg-btn:hover { color: var(--text); }
.seg-btn.is-active { background: var(--accent); color: #04121c; }

.chart-wrap { width: 100%; overflow-x: auto; }
canvas { width: 100%; height: auto; border-radius: 8px; background: #fff; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin: 6px 0 14px; }
.stat { background: #0f1620; border: 1px solid var(--panel-border); border-radius: 10px; padding: 11px 13px; }
.stat .v { font-size: 1.35rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.stat .l { color: var(--muted); font-size: 0.76rem; margin-top: 2px; }
.stat--accent .v { color: var(--accent); }
.stat--good .v { color: var(--good); }
.stat--warn .v { color: var(--warn); }
.stat--bad .v { color: var(--bad); }

.takeaway {
  margin-top: 12px; padding: 12px 14px; background: #0f1620;
  border-left: 3px solid var(--accent); border-radius: 6px; font-size: 0.92rem;
}

footer { padding: 24px 20px 40px; color: var(--muted); font-size: 0.85rem; }
footer a { color: var(--accent); }
footer code { color: var(--accent); }