:root {
  color-scheme: dark;
  --bg: #1a1b1e;
  --surface: #25272b;
  --line: #3a3d42;
  --text: #e6e7e9;
  --muted: #a9afb7;
  --accent: #8bb4ff;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.7;
}
header, main, footer { width: min(780px, calc(100% - 32px)); margin-inline: auto; }
header { padding: 32px 0 20px; border-bottom: 1px solid var(--line); }
.eyebrow { margin: 0 0 6px; color: var(--accent); font-size: 13px; font-weight: 700; letter-spacing: .04em; }
h1 { margin: 0; font-size: clamp(28px, 5vw, 42px); line-height: 1.25; }
.lead { margin: 14px 0 0; color: var(--muted); font-size: 18px; }
.meta { margin-top: 8px; font-size: 14px; }
main { padding: 14px 0 34px; }
section { padding: 24px 0; border-bottom: 1px solid var(--line); }
h2 { margin: 0 0 10px; font-size: 21px; }
h3 { margin: 18px 0 6px; font-size: 17px; }
p { margin: 8px 0; color: var(--muted); }
strong { color: var(--text); }
ul { margin: 10px 0 0; padding-left: 24px; color: var(--muted); }
ol { margin: 10px 0 0; padding-left: 28px; color: var(--muted); }
li + li { margin-top: 7px; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.button {
  display: inline-block; padding: 8px 13px; border: 1px solid var(--line); border-radius: 7px;
  color: var(--text); background: var(--surface); text-decoration: none;
}
.button.primary { border-color: #4c8bf5; background: #4c8bf5; color: #fff; }
a { color: var(--accent); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }
footer { display: flex; flex-wrap: wrap; gap: 8px 18px; padding: 24px 0 38px; color: var(--muted); font-size: 14px; }
@media (max-width: 520px) {
  header { padding-top: 24px; }
  .lead { font-size: 16px; }
}