:root {
  color-scheme: light dark;
  --bg: #fafafa;
  --fg: #1a1a1a;
  --border: #ccc;
  --muted: #666;
  --accent: #2563eb;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121212;
    --fg: #f0f0f0;
    --border: #444;
    --muted: #aaa;
    --accent: #60a5fa;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.45;
}

header.site {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.75rem 1.5rem;
}

header.site h1 {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 650;
}

header.site nav {
  display: flex;
  gap: 1rem;
}

header.site a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}

header.site a:hover {
  text-decoration: underline;
}

main {
  padding: 1.25rem 1.5rem 2rem;
  max-width: 52rem;
  margin: 0 auto;
}

p.muted {
  color: var(--muted);
  font-size: 0.92rem;
}

table.data {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.9rem;
}

table.data th,
table.data td {
  border: 1px solid var(--border);
  padding: 0.4rem 0.55rem;
  text-align: left;
}

table.data th {
  background: color-mix(in srgb, var(--bg) 90%, var(--fg));
}

form.preset {
  margin: 1rem 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

form.preset label {
  font-size: 0.88rem;
  color: var(--muted);
}

select,
button {
  font: inherit;
  padding: 0.35rem 0.5rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--fg);
}

button {
  border-color: var(--accent);
  color: var(--accent);
  font-weight: 600;
  cursor: pointer;
}

button:hover {
  opacity: 0.9;
}