:root {
  color-scheme: light dark;
  --bg: #f5f6f8;
  --surface: #ffffff;
  --text: #1c2230;
  --muted: #697386;
  --border: #e2e5ea;
  --accent: #2563eb;
  --on-accent: #ffffff;
  --good: #15803d;
  --good-bg: #effbf3;
  --down: #b42318;
  --warn-bg: #fff6e5;
  --warn-border: #f1bf5e;
  --line: #2563eb;
  --grid: #eceef2;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1216;
    --surface: #171b21;
    --text: #e6e9ef;
    --muted: #9aa3b2;
    --border: #272d36;
    --accent: #60a5fa;
    --on-accent: #0f1216;
    --good: #4ade80;
    --good-bg: #10241a;
    --down: #f87171;
    --warn-bg: #2a2110;
    --warn-border: #8a6a1f;
    --line: #60a5fa;
    --grid: #232932;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.wrap { max-width: 980px; margin: 0 auto; padding: 24px 16px 32px; }
h1 { font-size: 1.35rem; margin: 0 0 16px; }
.muted { color: var(--muted); font-weight: 400; }

.banner {
  background: var(--warn-bg);
  border: 1px solid var(--warn-border);
  border-radius: 10px;
  padding: 10px 14px;
  margin-bottom: 16px;
}

.cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
}

.card h2 {
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 6px;
}

.big { font-size: 1.75rem; font-weight: 650; margin: 0; font-variant-numeric: tabular-nums; }
.big small { font-size: .9rem; font-weight: 500; color: var(--muted); }
.sub { margin: 4px 0 0; color: var(--muted); font-size: .88rem; }

.card.good { border-color: var(--good); background: var(--good-bg); }
.card.good .big { color: var(--good); }
.up { color: var(--good); }
.down { color: var(--down); }

.info { margin: 12px 2px 20px; color: var(--muted); font-size: .9rem; }

.chart-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
}

.ranges { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 8px; }

.ranges button {
  font: inherit;
  font-size: .85rem;
  padding: 4px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  cursor: pointer;
}

.ranges button.active { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }

.chart { position: relative; height: 380px; }

footer { margin-top: 16px; font-size: .8rem; text-align: center; }

@media (max-width: 720px) {
  .cards { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .chart { height: 300px; }
  .big { font-size: 1.5rem; }
}