:root {
  --sky-top: #bfe0f7;
  --sky-bottom: #eef6fc;
  --card: #ffffff;
  --text: #1c2633;
  --muted: #5a6878;
  --accent: #e8800f;
  --accent-ink: #b85f00;
  --line: #d8e6f1;
}
* { box-sizing: border-box; }
html { background: var(--sky-bottom); }
body {
  margin: 0;
  min-height: 100vh;
  background: linear-gradient(180deg, var(--sky-top) 0%, var(--sky-bottom) 420px);
  color: var(--text);
  font: 16px/1.6 "Montserrat", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
img { display: block; max-width: 100%; height: auto; }
.visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}

/* Home page: the poster design as one centred column */
.poster {
  max-width: 1024px;
  margin: 0 auto;
  background: var(--sky-bottom);
  box-shadow: 0 0 60px rgba(28, 38, 51, 0.12);
}
.poster picture, .poster img { width: 100%; }
.poster-footer { padding: 26px 16px 30px; text-align: center; }
.poster-footer nav {
  display: flex; align-items: center; justify-content: center;
  gap: 14px 22px; flex-wrap: wrap;
}
.poster-footer a { color: var(--text); text-decoration: none; font-weight: 500; font-size: 16px; }
.poster-footer a:hover { color: var(--accent-ink); }
.poster-footer .sep { color: var(--muted); }
.poster-footer .rule { width: 52px; height: 1px; background: #9fb1c2; }
.copyright { margin: 14px 0 0; color: var(--muted); font-size: 13px; }
@media (max-width: 560px) {
  .poster-footer nav { gap: 8px 10px; }
  .poster-footer a { font-size: 14px; }
  .poster-footer .rule { display: none; }
}

/* Legal and support pages */
header.site, main.doc, footer.site { max-width: 760px; margin: 0 auto; padding: 0 16px; }
header.site { padding-top: 18px; }
header.site .banner img { width: 260px; margin: 0 auto; border-radius: 14px; }
header.site nav { margin-top: 12px; display: flex; justify-content: center; gap: 22px; flex-wrap: wrap; }
header.site nav a { color: var(--muted); text-decoration: none; font-weight: 500; font-size: 15px; }
header.site nav a:hover, header.site nav a[aria-current="page"] { color: var(--accent-ink); }
main.doc {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 28px 24px;
  margin-top: 16px;
  box-shadow: 0 8px 30px rgba(28, 38, 51, 0.06);
}
main.doc h1 { font-size: 28px; font-weight: 800; line-height: 1.25; margin: 0 0 6px; }
main.doc h2 { font-size: 18px; font-weight: 700; margin: 28px 0 6px; }
main.doc p.meta { color: var(--muted); margin-top: 0; font-size: 14px; }
main.doc a { color: var(--accent-ink); }
main.doc ul { padding-left: 22px; }
@media (max-width: 800px) {
  main.doc { margin: 16px 12px 0; padding: 24px 18px; }
  header.site nav { gap: 6px 16px; }
  header.site nav a { font-size: 14px; }
}
footer.site { color: var(--muted); font-size: 13px; text-align: center; padding-top: 18px; padding-bottom: 40px; }