:root {
  --navy: #12315c;
  --ink: #16202a;
  --muted: #5d6b76;
  --card: #f3f5f8;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --ink: #eef2f6; --muted: #a3b0bc; --card: #1c242d; }
  body { background: #0f141a; }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
  color: var(--ink);
}
main, header, footer { max-width: 46rem; margin: 0 auto; padding: 0 1.25rem; }
header { padding-top: 3rem; text-align: center; }
header .icon {
  width: 88px;
  height: 88px;
  border-radius: 20px;
  margin: 0 auto 1rem;
  background: var(--navy);
  display: grid;
  place-items: center;
  border: 3px solid #c62828;
}
header .icon span {
  display: block;
  width: 36px;
  height: 36px;
  border: 3px solid #c62828;
  border-radius: 6px;
  background: #fff;
}
h1 { font-size: 2.2rem; margin: 0.2rem 0; }
h2 { font-size: 1.25rem; margin-top: 2rem; }
.tagline { color: var(--muted); font-size: 1.15rem; margin: 0.25rem 0 1.5rem; }
.badge {
  display: inline-block;
  padding: 0.7rem 1.3rem;
  border-radius: 12px;
  background: var(--navy);
  color: white;
  text-decoration: none;
  font-weight: 600;
}
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr)); gap: 0.8rem; }
.card { background: var(--card); border-radius: 14px; padding: 1rem 1.1rem; }
.card h3 { margin: 0 0 0.3rem; font-size: 1rem; }
.card p { margin: 0; color: var(--muted); font-size: 0.95rem; }
nav { text-align: center; margin: 1.5rem 0 0; }
nav a { color: var(--navy); margin: 0 0.6rem; text-decoration: none; }
@media (prefers-color-scheme: dark) {
  nav a { color: #8eb4e8; }
}
footer { color: var(--muted); font-size: 0.85rem; padding: 2.5rem 1.25rem 3rem; text-align: center; }
a { color: var(--navy); }
@media (prefers-color-scheme: dark) {
  a { color: #8eb4e8; }
}