:root {
  color-scheme: light dark;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;
  line-height: 1.7;
  background: #f5f8fc;
  color: #17212b;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: linear-gradient(180deg, #f5f8fc 0%, #ffffff 65%);
}

main {
  width: min(680px, calc(100% - 40px));
  margin: 0 auto;
  padding: 72px 0 64px;
}

.mark {
  display: grid;
  place-items: center;
  width: 72px;
  height: 72px;
  margin-bottom: 24px;
  border-radius: 22px;
  background: #1769c2;
  color: white;
  font-size: 36px;
}

h1 { margin: 0 0 8px; font-size: clamp(32px, 8vw, 46px); letter-spacing: .02em; }
h2 { margin-top: 38px; font-size: 20px; }
p, li { color: #4b5560; }
ul { padding-left: 1.35em; }
a { color: #0a62b7; }
.lead { margin: 0; font-size: 18px; }
.meta { margin-top: 48px; font-size: 13px; color: #77808a; }
.links { display: flex; flex-wrap: wrap; gap: 14px 24px; margin-top: 34px; }
.links a { text-decoration: none; font-weight: 600; }

@media (prefers-color-scheme: dark) {
  :root { background: #101418; color: #f2f4f7; }
  body { background: linear-gradient(180deg, #101820 0%, #101418 65%); }
  p, li { color: #b8c0c8; }
  a { color: #6eb7ff; }
}