:root {
  color-scheme: light dark;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
  line-height: 1.65;
  --background: #f6f7f9;
  --surface: #ffffff;
  --text: #1d1d1f;
  --secondary: #68686d;
  --border: #e2e3e7;
  --accent: #5b45d6;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
}

main {
  width: min(100% - 32px, 780px);
  margin: 48px auto;
  padding: clamp(28px, 6vw, 64px);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 24px;
  box-shadow: 0 18px 48px rgb(0 0 0 / 5%);
}

h1 {
  margin: 0 0 40px;
  font-size: clamp(2rem, 6vw, 3rem);
  line-height: 1.1;
  letter-spacing: -0.035em;
}

h2 {
  margin: 36px 0 12px;
  font-size: 1.15rem;
  line-height: 1.35;
}

p,
ul {
  margin: 0 0 18px;
}

ul {
  padding-left: 1.4em;
}

li + li {
  margin-top: 8px;
}

a {
  color: var(--accent);
  text-underline-offset: 3px;
}

hr {
  margin: 44px 0 24px;
  border: 0;
  border-top: 1px solid var(--border);
}

.attribution {
  margin-bottom: 0;
  color: var(--secondary);
  font-size: 0.875rem;
}

@media (max-width: 560px) {
  main {
    width: 100%;
    margin: 0;
    border: 0;
    border-radius: 0;
    box-shadow: none;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #111113;
    --surface: #1c1c1f;
    --text: #f5f5f7;
    --secondary: #aaaab0;
    --border: #343438;
    --accent: #a99cff;
  }
}