:root {
  color-scheme: light dark;
  --bg: var(--tg-theme-bg-color, #fff);
  --text: var(--tg-theme-text-color, #111);
  --muted: var(--tg-theme-hint-color, #888);
  --accent: var(--tg-theme-button-color, #2481cc);
  --accent-text: var(--tg-theme-button-text-color, #fff);
  --section-bg: var(--tg-theme-secondary-bg-color, #f4f4f5);
  --error: #c0392b;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.4 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

header {
  padding: 16px 16px 8px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}

header h1 {
  font-size: 20px;
  margin: 0;
  font-weight: 600;
}

.muted {
  color: var(--muted);
  font-size: 13px;
}

main {
  padding: 8px 16px 80px;
}

section {
  background: var(--section-bg);
  border-radius: 12px;
  padding: 12px 16px;
  margin: 8px 0;
}

section h2 {
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  margin: 0 0 8px;
}

.kv {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 6px 0;
  border-bottom: 1px solid rgba(128,128,128,0.15);
}

.kv:last-child { border-bottom: 0; }

.kv span { color: var(--muted); }
.kv strong { font-variant-numeric: tabular-nums; font-weight: 600; }

.error { color: var(--error); }

footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 12px 16px env(safe-area-inset-bottom);
  background: var(--bg);
  border-top: 1px solid rgba(128,128,128,0.2);
  display: flex;
  align-items: center;
  gap: 12px;
}

button {
  background: var(--accent);
  color: var(--accent-text);
  border: 0;
  border-radius: 8px;
  padding: 10px 18px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}

button:disabled { opacity: 0.5; }

#staleness.warn { color: #e67e22; }
#staleness.alarm { color: var(--error); }