:root {
  color-scheme: light;
  --accent: #5b4ee8;
  --border: #e5e7eb;
  --muted: #5f6570;
  --surface: #ffffff;
  --background: #f7f7fa;
  --text: #16171a;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--background);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

body {
  margin: 0;
}

header,
main,
footer {
  width: min(100% - 2rem, 760px);
  margin-inline: auto;
}

header {
  padding-block: 2rem 1rem;
}

.brand {
  color: var(--text);
  font-size: 1.1rem;
  font-weight: 750;
  text-decoration: none;
}

main {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: 0 1px 3px rgb(0 0 0 / 5%);
  padding: clamp(1.25rem, 4vw, 3rem);
}

h1,
h2,
h3 {
  line-height: 1.25;
}

h1 {
  font-size: clamp(1.8rem, 6vw, 2.5rem);
  margin: 0 0 0.25rem;
}

h2 {
  border-top: 1px solid var(--border);
  font-size: 1.25rem;
  margin: 2rem 0 0.75rem;
  padding-top: 1.5rem;
}

h3 {
  font-size: 1rem;
  margin: 1.5rem 0 0.5rem;
}

p,
ul {
  margin-block: 0.75rem;
}

li + li {
  margin-top: 0.35rem;
}

.meta,
.note {
  color: var(--muted);
}

a {
  color: var(--accent);
  overflow-wrap: anywhere;
}

footer {
  color: var(--muted);
  font-size: 0.875rem;
  padding-block: 1.5rem 3rem;
  text-align: center;
}

@media (max-width: 520px) {
  header,
  main,
  footer {
    width: min(100% - 1rem, 760px);
  }

  header {
    padding-left: 0.5rem;
  }

  main {
    border-radius: 12px;
  }
}