:root {
  --bg: #f6f7f9; --card: #fff; --text: #14181f; --muted: #667085; --border: #e3e6eb;
  --up: #12805c; --down: #c23a2b; --warn: #b54708; --warn-bg: #fff4e5; --accent: #2457d6;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1216; --card: #181c22; --text: #e8ebf0; --muted: #98a2b3; --border: #2a3038;
    --up: #3ccf91; --down: #ff7a6b; --warn: #fdb022; --warn-bg: #2b2210; --accent: #7aa2ff;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; padding: 16px; background: var(--bg); color: var(--text);
  font: 15px/1.4 system-ui, -apple-system, "Segoe UI", sans-serif;
}
header, main, footer, .banner { max-width: 1100px; margin: 0 auto; }
header { display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; align-items: center; }
h1 { margin: 0; font-size: 1.4rem; }
h2 { margin: 24px 0 10px; font-size: 1rem; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); }
.muted { color: var(--muted); font-size: .85rem; margin: 2px 0 0; }
.actions { display: flex; gap: 14px; align-items: center; }
button {
  background: var(--accent); color: #fff; border: 0; border-radius: 8px;
  padding: 8px 16px; font: inherit; cursor: pointer;
}
button:disabled { opacity: .6; cursor: wait; }
a { color: var(--accent); }
.banner { margin-top: 12px; padding: 8px 12px; border-radius: 8px; background: var(--warn-bg); color: var(--warn); }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 12px; }
.tile { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 14px; }
.tile.stale, .tile.error { border-color: var(--warn); }
.tile-head { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.label { font-weight: 600; }
.badge { font-size: .72rem; padding: 2px 8px; border-radius: 99px; background: var(--warn-bg); color: var(--warn); cursor: help; }
.value { font-size: 1.6rem; font-weight: 700; margin: 6px 0 2px; font-variant-numeric: tabular-nums; }
.unit { font-size: .8rem; font-weight: 400; color: var(--muted); }
.delta { font-variant-numeric: tabular-nums; }
.up { color: var(--up); } .down { color: var(--down); } .flat { color: var(--muted); }
.spark { display: block; width: 100%; height: 36px; margin: 8px 0 6px; }
.spark polyline { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linejoin: round; stroke-linecap: round; }
.spark text { fill: var(--muted); font-size: 10px; }
.meta { font-size: .75rem; color: var(--muted); }
.meta a { color: inherit; }
footer { margin-top: 28px; padding-bottom: 16px; }

@media (max-width: 480px) {
  body { padding: 12px; }
  .grid { grid-template-columns: 1fr 1fr; gap: 8px; }
  .value { font-size: 1.3rem; }
}
@media (max-width: 340px) { .grid { grid-template-columns: 1fr; } }