:root {
  --navy: #0d1b3a;
  --cream: #faf5ec;
  --lime: #a3e635;
  --text: #1c2333;
  --muted: #5b6472;
  --bg: #fbfaf7;
  --card: #ffffff;
  --border: #e6e2d8;
}
@media (prefers-color-scheme: dark) {
  :root {
    --text: #eef1f6;
    --muted: #9aa3b2;
    --bg: #0b1226;
    --card: #14203f;
    --border: #24335c;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;
  line-height: 1.8;
}
header {
  background: var(--navy);
  color: var(--cream);
  padding: 40px 24px 32px;
}
.header-inner, main, footer .footer-inner {
  max-width: 720px;
  margin: 0 auto;
}
header .app-name {
  font-size: 1.6rem;
  font-weight: 700;
  margin: 0;
}
header .app-name .dot { color: var(--lime); }
header .tagline {
  margin: 6px 0 0;
  opacity: 0.85;
  font-size: 0.95rem;
}
nav { margin-top: 16px; font-size: 0.9rem; }
nav a {
  color: var(--cream);
  text-decoration: none;
  border: 1px solid rgba(250, 245, 236, 0.35);
  border-radius: 999px;
  padding: 6px 14px;
  margin-right: 8px;
  display: inline-block;
  margin-top: 6px;
}
nav a:hover { background: rgba(250, 245, 236, 0.12); }
main { padding: 32px 24px 48px; }
h1 { font-size: 1.4rem; margin: 0 0 4px; }
.updated { color: var(--muted); font-size: 0.85rem; margin-bottom: 24px; }
h2 {
  font-size: 1.05rem;
  margin: 32px 0 8px;
  padding-left: 10px;
  border-left: 4px solid var(--lime);
}
p, li { font-size: 0.95rem; }
ul { padding-left: 1.4em; }
a { color: #2563eb; }
@media (prefers-color-scheme: dark) { a { color: #7ea6ff; } }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 20px;
  margin: 12px 0;
}
.card h3 { margin: 0 0 6px; font-size: 0.98rem; }
.card p { margin: 0; color: var(--muted); }
footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.8rem;
  padding: 20px 24px 40px;
}
footer a { color: inherit; }