:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #101016;
  color: #f3f4f8;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: #101016;
  color: #f3f4f8;
  line-height: 1.65;
}

header {
  border-bottom: 1px solid #2a2c38;
  background: #171821;
}

nav, main, footer {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
}

nav {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  color: #ffffff;
  font-size: 20px;
  font-weight: 750;
  text-decoration: none;
}

.nav-links { display: flex; gap: 18px; }
.nav-links a, footer a { color: #9fc5ff; }

main { padding: 44px 0 56px; }
h1 { margin: 0 0 12px; font-size: 34px; line-height: 1.2; }
h2 { margin: 32px 0 8px; font-size: 21px; }
p, li { color: #c8cad4; }
a { color: #8ab8ff; }
.meta { color: #9396a5; font-size: 14px; }
.notice {
  margin: 24px 0;
  padding: 16px;
  border-left: 3px solid #3694ff;
  background: #191d29;
}

.action {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: 12px;
  padding: 0 16px;
  border-radius: 6px;
  background: #1976d2;
  color: #ffffff;
  font-weight: 700;
  text-decoration: none;
}

footer {
  padding: 24px 0 40px;
  border-top: 1px solid #2a2c38;
  color: #9396a5;
  font-size: 14px;
}

@media (max-width: 640px) {
  nav { align-items: flex-start; flex-direction: column; padding: 14px 0; }
  .nav-links { flex-wrap: wrap; gap: 10px 16px; }
  h1 { font-size: 28px; }
  main { padding-top: 32px; }
}