:root {
  color-scheme: light dark;
  --background: #f7f8fa;
  --surface: #ffffff;
  --text: #1b2530;
  --muted: #4d5b68;
  --link: #1459a6;
  --border: #d7dee5;
  --accent: #e8f1fb;
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #121820;
    --surface: #1b2530;
    --text: #eef3f8;
    --muted: #c0ccd7;
    --link: #9ac8ff;
    --border: #3b4a59;
    --accent: #24384c;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 32px 20px 48px;
  background: var(--background);
  color: var(--text);
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 17px;
  line-height: 1.65;
}

main {
  width: 100%;
  max-width: 40rem;
  margin: 0 auto;
}

.site-header {
  margin: 0 0 32px;
  padding: 26px 28px 28px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: 0 8px 28px rgb(20 35 50 / 7%);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

h1,
h2 {
  color: var(--text);
  line-height: 1.2;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 8vw, 2.8rem);
  letter-spacing: -0.035em;
}

.intro {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 1.05rem;
}

section {
  margin: 0 0 26px;
  padding: 0 4px;
}

h2 {
  margin: 0 0 10px;
  font-size: 1.28rem;
  letter-spacing: -0.015em;
}

p {
  margin: 0 0 12px;
}

a {
  color: var(--link);
  font-weight: 600;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  text-decoration-thickness: 2px;
}

a:focus-visible {
  outline: 3px solid var(--link);
  outline-offset: 3px;
  border-radius: 2px;
}

strong {
  color: var(--text);
}

code {
  padding: 0.08em 0.28em;
  background: var(--accent);
  border-radius: 4px;
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.9em;
  overflow-wrap: anywhere;
}

.updated {
  margin-top: 24px;
  color: var(--muted);
  font-size: 0.9rem;
}

footer {
  margin-top: 34px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
}

@media (max-width: 480px) {
  body {
    padding: 18px 16px 36px;
    font-size: 16px;
  }

  .site-header {
    margin-bottom: 28px;
    padding: 22px 20px 24px;
    border-radius: 14px;
  }
}