:root {
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui, sans-serif;
  color: #10203b;
  background: #f5f8ff;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 32px 20px;
  background: radial-gradient(circle at top, #dce9ff 0, #f5f8ff 50%);
}

main {
  width: min(680px, 100%);
  padding: 36px;
  border: 1px solid rgba(50, 94, 166, 0.14);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 24px 70px rgba(36, 78, 146, 0.12);
}

.brand { display: flex; align-items: center; gap: 14px; }
.brand img { width: 56px; height: 56px; border-radius: 14px; }
h1 { margin: 0; font-size: clamp(1.8rem, 5vw, 2.4rem); letter-spacing: -0.04em; }
h2 { margin-top: 28px; font-size: 1.15rem; }
p, li { line-height: 1.65; color: #405171; }
ol, ul { padding-left: 1.4rem; }
code { padding: 0.15em 0.4em; border-radius: 6px; background: #edf3ff; }
a { color: #245fc2; }
nav { margin-top: 32px; display: flex; gap: 18px; flex-wrap: wrap; font-size: 0.92rem; }
.updated { margin-top: 32px; font-size: 0.85rem; color: #70809e; }

@media (max-width: 520px) {
  main { padding: 26px 22px; border-radius: 22px; }
}