:root {
  color-scheme: light dark;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #0b0f14;
  color: #e7edf5;
}
* { box-sizing: border-box; }
body { margin: 0; }
main { width: min(760px, calc(100% - 40px)); margin: 0 auto; padding: 72px 0 96px; }
a { color: #57adff; }
.brand { display: flex; align-items: center; gap: 12px; color: #aeb9c7; font-size: 14px; }
.brand img { width: 34px; height: 34px; }
h1 { margin: 34px 0 14px; font-size: clamp(34px, 7vw, 56px); letter-spacing: -.035em; line-height: 1.02; }
h2 { margin-top: 42px; font-size: 22px; }
p, li { color: #c6d0dd; font-size: 17px; line-height: 1.65; }
nav { display: flex; gap: 18px; margin-top: 30px; }
.note { margin-top: 38px; padding: 18px 20px; border: 1px solid #273443; border-radius: 16px; background: #111821; }
footer { margin-top: 64px; padding-top: 24px; border-top: 1px solid #273443; color: #8290a2; font-size: 13px; }
@media (prefers-color-scheme: light) {
  :root { background: #fff; color: #111820; }
  p, li { color: #3f4b5a; }
  .note { background: #f6f8fb; border-color: #dbe2ea; }
  footer { border-color: #dbe2ea; }
}