:root {
  color-scheme: light dark;
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.7;
  color: #172026;
  background: #f4f7f8;
}

body {
  margin: 0;
}

main {
  width: min(680px, calc(100% - 40px));
  margin: 0 auto;
  padding: 72px 0;
}

h1,
h2,
h3 {
  line-height: 1.3;
}

h1 {
  margin: 0 0 24px;
  font-size: clamp(2rem, 7vw, 3.5rem);
  letter-spacing: -0.04em;
}

h2 {
  margin-top: 48px;
  font-size: 1.35rem;
}

h3 {
  margin-top: 32px;
  font-size: 1.05rem;
}

a {
  color: #087d8f;
}

.lead {
  font-size: 1.2rem;
}

.links {
  display: grid;
  gap: 12px;
  margin: 40px 0;
}

.links a {
  padding: 18px 20px;
  color: inherit;
  background: #ffffff;
  border: 1px solid #dce5e8;
  border-radius: 14px;
  text-decoration: none;
}

footer {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid #dce5e8;
  font-size: 0.9rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    color: #edf3f4;
    background: #10272c;
  }

  a {
    color: #7ed9e5;
  }

  .links a {
    background: #17343a;
    border-color: #315158;
  }

  footer {
    border-color: #315158;
  }
}