:root {
  --bg: #f7f7f5;
  --surface: #ffffff;
  --text: #1c1c1e;
  --muted: #6b6b70;
  --border: #e4e4e0;
  --accent: #0a4672;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111113;
    --surface: #1c1c1f;
    --text: #f2f2f2;
    --muted: #a1a1a6;
    --border: #2c2c30;
    --accent: #6cb6e8;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 48px 16px;
  background: var(--bg);
  color: var(--text);
  font-family:
    system-ui,
    -apple-system,
    'Segoe UI',
    Roboto,
    sans-serif;
  line-height: 1.6;
}

main {
  max-width: 720px;
  margin: 0 auto;
}

h1 {
  margin: 0;
  font-size: 40px;
  letter-spacing: -0.5px;
}

h2 {
  margin: 48px 0 16px;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--muted);
}

p {
  margin: 0 0 12px;
}

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

.lead {
  font-size: 19px;
  color: var(--muted);
}

.app {
  display: flex;
  gap: 18px;
  align-items: center;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--surface);
  text-decoration: none;
  color: inherit;
}

.app img {
  width: 72px;
  height: 72px;
  border-radius: 18px;
  flex-shrink: 0;
}

.app strong {
  display: block;
  font-size: 18px;
}

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

dl {
  margin: 0;
}

dt {
  margin-top: 16px;
  font-weight: 600;
}

dd {
  margin: 4px 0 0;
  color: var(--muted);
}

footer {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 14px;
  color: var(--muted);
}