:root {
  --ground: #FFFBF2;
  --surface: #FFFFFF;
  --ink: #14100A;
  --muted: #5F5546;
  --faint: #8A7A5E;
  --rule: #E3D9C4;
  --accent: #E76F0E;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ground: #0E111A;
    --surface: #161A26;
    --ink: #E4E7EF;
    --muted: #99A1B8;
    --faint: #6E7690;
    --rule: #272D3D;
    --accent: #E39A4E;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 44rem; margin: 0 auto; padding: 0 1.5rem 5rem; }

header { padding: 4rem 0 2rem; border-bottom: 1px solid var(--rule); }

.brand {
  display: inline-flex; align-items: center; gap: .7rem;
  text-decoration: none; color: var(--ink);
}
.mark {
  width: 2.25rem; height: 2.25rem; border-radius: .6rem;
  background: var(--accent); flex: none;
}
.brand strong { font-size: 1.35rem; letter-spacing: -.02em; }

h1 { font-size: 2rem; line-height: 1.15; letter-spacing: -.03em; margin: 2.5rem 0 .5rem; }
h2 { font-size: 1.1rem; letter-spacing: -.01em; margin: 2.25rem 0 .5rem; }
p, li { color: var(--muted); }
li { margin-bottom: .4rem; }
strong { color: var(--ink); }

.updated { color: var(--faint); font-size: .875rem; margin: 0 0 2rem; }

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

.card {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: .9rem;
  padding: 1.5rem;
  margin: 2rem 0;
}

.mail {
  display: inline-block; margin-top: .35rem;
  font-size: 1.15rem; font-weight: 600;
}

footer {
  margin-top: 3rem; padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
  color: var(--faint); font-size: .875rem;
}
footer a { margin-right: 1rem; }