:root {
  color-scheme: light dark;
  --background: oklch(0.985 0 0);
  --ink: oklch(0.22 0.006 290);
  --muted: oklch(0.42 0.014 290);
  --accent: oklch(0.43 0.17 295);
  --surface: oklch(0.95 0.014 295);
  font-family: system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--background);
  color: var(--ink);
}
main {
  max-width: 56rem;
  margin: 0 auto;
  padding: 2rem clamp(1.25rem, 5vw, 4rem);
}
header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  flex-wrap: wrap;
}
header a {
  font-size: 1.25rem;
  font-weight: 750;
  text-decoration: none;
}
header span,
.detail,
footer {
  color: var(--muted);
}
h1 {
  margin: 4rem 0 1.5rem;
  font-size: clamp(3rem, 9vw, 5.5rem);
  line-height: 1.05;
  letter-spacing: -0.035em;
  text-wrap: balance;
}
h2 {
  font-size: 1.35rem;
  line-height: 1.3;
  text-wrap: balance;
}
p {
  max-width: 65ch;
  font-size: 1rem;
  line-height: 1.7;
  text-wrap: pretty;
}
.intro {
  font-size: 1.25rem;
}
section {
  margin: 2.5rem 0 1.5rem;
  padding: 1.5rem;
  background: var(--surface);
  border-radius: 12px;
}
section h2 {
  margin-top: 0;
}
nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}
a {
  color: var(--accent);
  text-underline-offset: 0.2em;
}
a:hover {
  text-decoration-thickness: 2px;
}
a:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
}
.primary {
  display: inline-block;
  background: var(--accent);
  color: white;
  padding: 0.8rem 1.1rem;
  border-radius: 6px;
  font-weight: 650;
  text-decoration: none;
}
.primary:hover {
  text-decoration: underline;
}
footer {
  margin-top: 3rem;
  font-size: 0.85rem;
  line-height: 1.6;
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: oklch(0.2 0.006 290);
    --ink: oklch(0.95 0 0);
    --muted: oklch(0.77 0.01 290);
    --accent: oklch(0.78 0.12 295);
    --surface: oklch(0.27 0.022 295);
  }
  .primary {
    color: oklch(0.2 0.006 290);
  }
}