:root {
  color-scheme: light dark;
  --page: #f5f7fb;
  --ink: #101114;
  --muted: #5f6470;
  --line: rgba(16, 17, 20, 0.12);
  --surface: rgba(255, 255, 255, 0.78);
  --accent: #087f72;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 15% 0%, rgba(60, 186, 174, 0.16), transparent 31rem),
    radial-gradient(circle at 88% 8%, rgba(98, 142, 235, 0.14), transparent 26rem),
    var(--page);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  letter-spacing: 0;
  line-height: 1.5;
}

a {
  color: var(--accent);
}

main {
  width: min(760px, calc(100% - 32px));
  margin: 0 auto;
  padding: clamp(40px, 8vw, 88px) 0;
}

article {
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--surface);
  box-shadow: 0 24px 72px rgba(16, 17, 20, 0.1);
  padding: clamp(24px, 5vw, 56px);
  -webkit-backdrop-filter: blur(24px);
  backdrop-filter: blur(24px);
}

nav {
  display: flex;
  gap: 18px;
  align-items: center;
  margin-bottom: 38px;
  color: var(--muted);
  font-size: 15px;
}

nav strong {
  color: var(--ink);
  font-size: 17px;
}

nav a {
  text-decoration: none;
}

h1 {
  margin: 0 0 10px;
  font-size: clamp(34px, 6vw, 58px);
  letter-spacing: -0.02em;
  line-height: 1.05;
}

h2 {
  margin: 32px 0 10px;
  font-size: clamp(20px, 3vw, 26px);
  line-height: 1.2;
}

h3 {
  margin: 20px 0 8px;
  font-size: 18px;
}

p,
li {
  color: var(--muted);
  font-size: 17px;
}

ul,
ol {
  padding-left: 22px;
}

.lede {
  color: var(--ink);
  font-size: 20px;
  max-width: 36rem;
}

.meta {
  color: var(--muted);
  font-size: 15px;
}

.callout {
  margin-top: 24px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.52);
  padding: 18px 20px;
}

.callout p {
  margin: 0;
}

footer {
  margin-top: 26px;
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}

@media (prefers-color-scheme: dark) {
  :root {
    --page: #080a0d;
    --ink: #f5f7fb;
    --muted: #aeb5c2;
    --line: rgba(255, 255, 255, 0.12);
    --surface: rgba(24, 28, 35, 0.76);
    --accent: #64e2d3;
  }

  .callout {
    background: rgba(255, 255, 255, 0.05);
  }
}