:root {
  color-scheme: light dark;
  --bg: #f6f6f4;
  --fg: #1b1b1b;
  --muted: #5c5c5c;
  --link: #0b57d0;
  --border: #d9d9d4;
  --card: #ffffff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121212;
    --fg: #ececec;
    --muted: #b3b3b3;
    --link: #8ab4f8;
    --border: #3a3a3a;
    --card: #1c1c1c;
  }
}

* {
  box-sizing: border-box;
}

html {
  font-family: "Segoe UI", system-ui, sans-serif;
  line-height: 1.55;
  background: var(--bg);
  color: var(--fg);
}

body {
  margin: 0;
}

header,
main,
footer {
  max-width: 44rem;
  margin: 0 auto;
  padding: 1.25rem 1.1rem;
}

header {
  padding-bottom: 0;
}

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

h1 {
  font-size: 1.7rem;
  line-height: 1.25;
  margin: 0 0 0.4rem;
}

h2 {
  font-size: 1.15rem;
  margin: 1.6rem 0 0.5rem;
}

p,
ul {
  margin: 0.7rem 0;
}

ul {
  padding-left: 1.2rem;
}

a {
  color: var(--link);
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  margin: 0.75rem 0 0;
}

.card {
  display: block;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.9rem 1rem;
  text-decoration: none;
  color: inherit;
}

.card strong {
  display: block;
  color: var(--link);
}

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

.updated {
  color: var(--muted);
  margin: 0 0 1.2rem;
}