/* Mercury static site. Plain-language, accessibility-first (Confluence:
   Accessibility & Plain Language): high contrast, generous spacing, readable
   measure, scales with the user's font-size preference, no JS. */

:root {
  --ink: #1a1d24;
  --muted: #51596b;
  --accent: #1457c8;
  --rule: #e2e6ee;
  --bg: #ffffff;
  --bg-soft: #f6f8fc;
  --measure: 42rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  /* Respect the user's browser font-size; everything below uses rem. */
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  font-size: 1.125rem;
  line-height: 1.65;
}

/* Keyboard skip link — visible only on focus. */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: #fff;
  padding: 0.6rem 1rem;
  border-radius: 0 0 0.4rem 0;
}
.skip-link:focus {
  left: 0;
}

a {
  color: var(--accent);
}
a:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

.site-header {
  border-bottom: 1px solid var(--rule);
}
.wordmark {
  display: inline-block;
  font-weight: 700;
  letter-spacing: -0.01em;
  text-decoration: none;
  color: var(--ink);
}
.site-header .wordmark {
  padding: 1.25rem 1.5rem;
  font-size: 1.25rem;
}

/* Readable column for long-form legal text. */
.prose {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 1.5rem 1.5rem 4rem;
}
.prose h1 {
  font-size: 1.9rem;
  line-height: 1.2;
  margin: 1.5rem 0 0.5rem;
}
.prose h2 {
  font-size: 1.35rem;
  margin: 2.5rem 0 0.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
}
.prose h3 {
  font-size: 1.1rem;
  margin: 1.75rem 0 0.4rem;
}
.prose p,
.prose li {
  color: var(--ink);
}
.prose blockquote {
  margin: 1.5rem 0;
  padding: 0.75rem 1.25rem;
  background: var(--bg-soft);
  border-left: 4px solid var(--accent);
  color: var(--muted);
  border-radius: 0 0.4rem 0.4rem 0;
}
.prose hr {
  border: none;
  border-top: 1px solid var(--rule);
  margin: 2.5rem 0;
}
.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0;
  font-size: 0.98rem;
}
.prose th,
.prose td {
  text-align: left;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--rule);
  vertical-align: top;
}
.prose th {
  background: var(--bg-soft);
}
.prose code {
  background: var(--bg-soft);
  padding: 0.1rem 0.35rem;
  border-radius: 0.25rem;
  font-size: 0.9em;
}

.site-footer {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 1.5rem;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.95rem;
}

/* Centered placeholder landing page. */
.landing {
  min-height: 80vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem 1.5rem;
  gap: 0.25rem;
}
.landing .wordmark {
  font-size: 2.5rem;
  margin: 0;
}
.landing .tagline {
  color: var(--muted);
  margin: 0.25rem 0 1.25rem;
}