:root {
  --bg: #ffffff;
  --fg: #1b1f23;
  --muted: #5b6570;
  --line: #e3e7eb;
  --card: #f7f9fa;
  --link: #1a5fb4;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171a;
    --fg: #e8eaed;
    --muted: #9aa4ae;
    --line: #2a2f35;
    --card: #1c2025;
    --link: #7cb0f0;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
  max-width: 44rem;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
header { border-bottom: 1px solid var(--line); padding-bottom: 1.25rem; margin-bottom: 2rem; }
h1 { font-size: 1.6rem; margin: 0 0 .35rem; }
h2 { font-size: 1.15rem; margin: 2rem 0 .6rem; }
h3 { font-size: 1rem; margin: 1.4rem 0 .4rem; }
.brand { display: flex; align-items: center; gap: .85rem; margin-bottom: .4rem; }
.brand img { flex: none; }
.brand h1 { margin: 0; }
.tagline, .muted { color: var(--muted); }
.tagline { margin: 0; }
a { color: var(--link); }
nav a { margin-right: 1rem; }
.app {
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  margin: 1rem 0;
}
.app h3 { margin-top: 0; }
table { border-collapse: collapse; width: 100%; margin: .75rem 0; }
th, td { border: 1px solid var(--line); padding: .5rem .6rem; text-align: left; vertical-align: top; }
th { background: var(--card); font-weight: 600; }
code { background: var(--card); padding: .1rem .35rem; border-radius: 4px; font-size: .9em; }
ul { padding-left: 1.2rem; }
footer { border-top: 1px solid var(--line); margin-top: 3rem; padding-top: 1rem; font-size: .9rem; }
@media (max-width: 480px) { table, thead, tbody, th, td, tr { display: block; } th { border-bottom: none; } }