/* Public subject landing pages (public/landing/<subject>/index.html), served at
   /<subject>/ to signed-out visitors and search engines by public/_worker.js. */
:root {
  --sl-bg: #08101f;
  --sl-panel: #101a2e;
  --sl-text: #eef2fb;
  --sl-muted: #b6c0d6;
  --sl-accent: #7cc4ff;
  --sl-line: rgba(255, 255, 255, 0.14);
  color-scheme: dark;
}

* { box-sizing: border-box; }

body.seo-landing {
  margin: 0;
  background:
    linear-gradient(rgba(6, 10, 20, 0.5), rgba(6, 10, 20, 0.82)),
    var(--sl-bg-image, none) center / cover fixed,
    var(--sl-bg);
  color: var(--sl-text);
  font: 400 1rem/1.65 system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}

.skip-link { position: absolute; left: -999px; }
.skip-link:focus { left: 1rem; top: 1rem; z-index: 10; background: var(--sl-panel); padding: 0.5rem 1rem; }

.seo-landing a { color: var(--sl-accent); }
.seo-landing a:focus-visible { outline: 3px solid var(--sl-accent); outline-offset: 3px; }

.seo-landing__bar,
.seo-landing__main,
.seo-landing__footer {
  width: min(62rem, calc(100% - 2rem));
  margin-inline: auto;
}

.seo-landing__bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding-block: 1rem;
  /* room for the site-wide search button fixed in the top-right corner */
  padding-right: 9.5rem;
}

.seo-landing__brand { color: var(--sl-text) !important; font-weight: 800; text-decoration: none; }
.seo-landing__login { font-weight: 700; }

.seo-landing__main {
  padding: clamp(1.25rem, 4vw, 2.5rem);
  border: 1px solid var(--sl-line);
  border-radius: 1rem;
  background: rgba(12, 20, 38, 0.8);
  backdrop-filter: blur(6px);
}

.seo-landing__crumbs { color: var(--sl-muted); font-size: 0.9rem; }

.seo-landing h1 { margin: 0.5rem 0 1rem; font-size: clamp(1.9rem, 5vw, 3rem); line-height: 1.1; }
.seo-landing h2 { margin-top: 2.25rem; font-size: 1.4rem; }
.seo-landing h3 { margin-bottom: 0.25rem; font-size: 1.05rem; }
.seo-landing p, .seo-landing li, .seo-landing dd { max-width: 72ch; }
.seo-landing__lead { font-size: 1.1rem; color: var(--sl-muted); }

.seo-landing__actions { display: flex; flex-wrap: wrap; align-items: center; gap: 0.75rem 1.25rem; margin-top: 1.5rem; }
.seo-landing__primary {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  padding: 0.6rem 1.2rem;
  border-radius: 999px;
  background: var(--sl-accent);
  color: #06101f !important;
  font-weight: 800;
  text-decoration: none;
}

.seo-landing__topics { display: grid; gap: 0.75rem; margin: 0; }
.seo-landing__topics div { padding: 0.75rem 1rem; border: 1px solid var(--sl-line); border-radius: 0.75rem; }
.seo-landing__topics dt { font-weight: 700; }
.seo-landing__topics dd { margin: 0.2rem 0 0; color: var(--sl-muted); }

.seo-landing__years {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.5rem;
  padding: 0;
  list-style: none;
}
.seo-landing__years li {
  padding: 0.2rem 0.65rem;
  border: 1px solid var(--sl-line);
  border-radius: 999px;
  font-size: 0.9rem;
}

.seo-landing__related { display: flex; flex-wrap: wrap; gap: 0.5rem 1.25rem; }

.seo-landing__footer {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  padding-block: 1.5rem 2.5rem;
  color: var(--sl-muted);
  font-size: 0.9rem;
}
.seo-landing__footer p { flex-basis: 100%; margin: 0.5rem 0 0; }

@media (min-width: 48rem) {
  .seo-landing__topics { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 40rem) {
  .seo-landing__bar, .seo-landing__main, .seo-landing__footer { width: calc(100% - 2rem); }
  .seo-landing__bar { padding-right: 3.5rem; }
}