:root {
  color-scheme: light dark;
  --bg: #f2f2f7;
  --surface: #ffffff;
  --ink: #1c1c1e;
  --muted: #8e8e93;
  --line: #d1d1d6;
  --link: #007aff;
  --measure: 65ch;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --surface: #1c1c1e;
    --ink: #f2f2f7;
    --muted: #8e8e93;
    --line: #3a3a3c;
    --link: #0a84ff;
  }
}

* {
  box-sizing: border-box;
}

html {
  font-size: 17px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
  color: var(--ink);
  background: var(--bg);
}

a {
  color: var(--link);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.wrap {
  width: min(var(--measure), calc(100% - 2.5rem));
  margin: 0 auto;
  padding: 2.5rem 0 4.5rem;
}

header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 1.75rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: 2.25rem;
}

.mark {
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--ink);
  text-decoration: none;
}

.mark:hover {
  text-decoration: none;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.1rem;
  font-size: 0.94rem;
}

h1 {
  font-size: 2rem;
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 1.15;
  margin: 0 0 0.75rem;
}

h2 {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 2rem 0 0.45rem;
}

.lede,
.updated {
  color: var(--muted);
}

.lede {
  font-size: 1.12rem;
  margin: 0 0 1.25rem;
}

.updated {
  font-size: 0.88rem;
  margin: 0 0 2rem;
}

p,
li {
  margin: 0 0 0.9rem;
}

ol {
  padding-left: 1.2rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.25rem 1.35rem;
  margin: 1.5rem 0 2rem;
}

.card p:last-child {
  margin-bottom: 0;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin: 1.5rem 0 0;
  font-weight: 500;
}

footer {
  margin-top: 3rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.88rem;
}

footer p {
  margin: 0 0 0.4rem;
}

body.home {
  color-scheme: light;
  --bg: #f5f5f7;
  --ink: #1c1c1e;
  --muted: #3a3a3c;
  --line: #d8d8dc;
  --link: #007aff;
  text-align: center;
}

body.home .wrap {
  width: min(38rem, calc(100% - 2.5rem));
  padding: 1.75rem 0 3.5rem;
}

body.home header {
  border-bottom: none;
  padding-bottom: 0;
  margin-bottom: 3.25rem;
  text-align: left;
}

body.home .mark {
  font-weight: 700;
}

body.home h1 {
  font-size: 2.15rem;
  font-weight: 700;
  letter-spacing: -0.045em;
  line-height: 1.18;
  margin: 0 0 1rem;
}

body.home .lede {
  color: var(--ink);
  font-size: 1.05rem;
  line-height: 1.5;
  margin: 0 auto 2.35rem;
  max-width: 34rem;
}

body.home hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 0;
}

body.home .block {
  padding: 2.15rem 0 0.35rem;
}

body.home .block + .block {
  padding-top: 1.85rem;
  padding-bottom: 2.15rem;
}

body.home .icon {
  display: block;
  margin: 0 auto 0.85rem;
  color: var(--link);
}

body.home .block p {
  margin: 0 auto;
  max-width: 34rem;
}

body.home .status {
  margin: 2.1rem auto;
  max-width: 36rem;
}

body.home .links {
  justify-content: center;
  gap: 0.85rem 1.65rem;
  margin: 0.35rem 0 2.6rem;
  font-weight: 400;
}

body.home footer {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
  color: var(--ink);
  font-size: 0.82rem;
}