:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  background: #08111c;
  color: #edf5ff;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background:
    radial-gradient(circle at 20% 0%, rgba(40, 190, 150, 0.16), transparent 34rem),
    #08111c;
  line-height: 1.7;
}

main, nav {
  width: min(880px, calc(100% - 40px));
  margin: 0 auto;
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0;
}

nav div { display: flex; gap: 18px; }
a { color: #7ae4bd; }
nav a { text-decoration: none; }

header { padding: 80px 0 48px; }
h1 { margin: 0 0 18px; font-size: clamp(38px, 8vw, 72px); line-height: 1.05; }
h2 { margin-top: 42px; color: #c9f7e6; }
p, li { color: #b9c7d8; }
.lead { max-width: 700px; font-size: 19px; }
.tag {
  display: inline-block;
  margin-bottom: 18px;
  padding: 6px 10px;
  border: 1px solid rgba(122, 228, 189, 0.28);
  border-radius: 999px;
  color: #7ae4bd;
  font-size: 12px;
  letter-spacing: 0.08em;
}
.card {
  margin: 24px 0;
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.035);
}
footer {
  margin-top: 72px;
  padding: 28px 0 42px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: #718197;
  font-size: 13px;
}
code { color: #9ddcff; }

@media (max-width: 620px) {
  nav { align-items: flex-start; gap: 16px; }
  nav div { flex-direction: column; gap: 5px; }
  header { padding-top: 48px; }
}