:root {
  --bg: #0e1116;
  --surface: #161b22;
  --surface-2: #1f2630;
  --border: #2a323d;
  --text: #e6edf3;
  --text-dim: #9aa6b2;
  --accent: #58a6ff;
  --ok: #57c98a;
  --warn: #d29922;
  --bad: #f85149;
  --grid: #2a323d;
  --c1: #58a6ff;
  --c2: #f97583;
  --c3: #57c98a;
  --c4: #f97316;
  --c5: #d29922;
  --c6: #c678dd;
  --code: "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--text);
  font: 15px/1.55 -apple-system, BlinkMacSystemFont, "Hiragino Sans",
    "Yu Gothic UI", system-ui, sans-serif;
}

main { max-width: 1080px; margin: 0 auto; padding: 32px 20px 80px; }
header { margin-bottom: 18px; }
h1 { font-size: 28px; margin: 0 0 8px; letter-spacing: -0.01em; }
.lede { margin: 0; color: var(--text-dim); max-width: 760px; }
.lede strong { color: var(--text); }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

code {
  font-family: var(--code); font-size: 12.5px;
  background: var(--surface-2); padding: 1px 5px; border-radius: 3px;
  border: 1px solid var(--border);
}

section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  margin-bottom: 12px;
}

/* ────────── controls ────────── */

.controls { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }

.control-group {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px; color: var(--text-dim);
}
.control-group span {
  text-transform: uppercase; font-size: 11px; letter-spacing: 0.06em;
}

select, input[type="text"] {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  font: inherit; font-size: 13px; font-family: var(--code);
  padding: 6px 8px; border-radius: 5px;
}

button {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--code); font-size: 12.5px;
  padding: 6px 12px; border-radius: 6px; cursor: pointer;
}
button:hover { border-color: var(--accent); color: var(--accent); }

/* ────────── chart ────────── */

.chart-head {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 8px; flex-wrap: wrap; gap: 8px;
}

.status {
  font-family: var(--code); font-size: 12px; color: var(--text-dim);
}
.status.loading { color: var(--warn); }
.status.ready { color: var(--ok); }
.status.error { color: var(--bad); }

.legend { display: flex; gap: 14px; flex-wrap: wrap; }
.legend-item {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px; font-family: var(--code); color: var(--text-dim);
}
.legend-item .dot { width: 10px; height: 10px; border-radius: 2px; display: inline-block; }

#chart {
  display: block; width: 100%; height: auto;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.gridline { stroke: var(--grid); stroke-width: 1; }
.axis-label {
  fill: var(--text-dim); font-family: var(--code); font-size: 10.5px;
  user-select: none;
}
.series-line {
  fill: none; stroke-width: 1.6;
}
.series-line.c1 { stroke: var(--c1); }
.series-line.c2 { stroke: var(--c2); }
.series-line.c3 { stroke: var(--c3); }
.series-line.c4 { stroke: var(--c4); }
.series-line.c5 { stroke: var(--c5); }
.series-line.c6 { stroke: var(--c6); }

.axis-rect {
  fill: none; stroke: var(--border); stroke-width: 1;
}

/* ────────── stats ────────── */

.stats-section {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  padding: 12px;
}

@media (min-width: 720px) {
  .stats-section { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
}

.stat-card {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 12px;
}
.stat-card .ticker {
  font-family: var(--code); font-weight: 600; font-size: 14px;
  display: flex; align-items: center; gap: 6px;
}
.stat-card .ticker .dot {
  width: 10px; height: 10px; border-radius: 2px; display: inline-block;
}
.stat-card .vals {
  font-family: var(--code); font-size: 11.5px;
  color: var(--text-dim);
  margin-top: 6px;
  display: grid; grid-template-columns: max-content auto; gap: 2px 8px;
}
.stat-card .vals strong { color: var(--text); }
.stat-card .change.up { color: var(--ok); }
.stat-card .change.down { color: var(--bad); }

/* ────────── footer ────────── */

footer { margin-top: 24px; font-size: 12.5px; color: var(--text-dim); }
footer p { margin: 4px 0; }