/* Same dark palette as @delta/ui-kit's skin.css / the Worker's hand-rendered
   /mfa page — this is a plain static site (no build step, no access to the
   shared package), so the variables are duplicated here on purpose, same
   POC-only pattern used elsewhere in this project for small cross-cutting
   pieces. */
:root {
  color-scheme: dark;
  --bg: #0f1115;
  --surface: #171a21;
  --border: #2a2e37;
  --text: #e8eaed;
  --muted: #9aa0ab;
  --accent: #5b8def;
  --accent-ink: #08101f;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

a {
  color: inherit;
}

.site-header {
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 10;
}

.site-header-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.brand {
  font-weight: 700;
  font-size: 1.125rem;
  text-decoration: none;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
}

.site-nav a {
  text-decoration: none;
  color: var(--muted);
  font-size: 0.9375rem;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--text);
}

.operator-login-link {
  font: inherit;
  padding: 8px 16px;
  background: var(--accent);
  border-radius: 999px;
  color: var(--accent-ink) !important;
  font-weight: 600;
  text-decoration: none !important;
}

main {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

.hero {
  padding: 72px 0 48px;
  text-align: center;
}

.hero h1 {
  font-size: 2.5rem;
  margin: 0 0 16px;
}

.hero p {
  color: var(--muted);
  font-size: 1.125rem;
  max-width: 640px;
  margin: 0 auto 32px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  font: inherit;
  padding: 12px 24px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9375rem;
  display: inline-block;
}

.btn-primary {
  background: var(--accent);
  color: var(--accent-ink);
}

.btn-secondary {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
}

h2 {
  font-size: 1.5rem;
  margin: 0 0 8px;
}

.section {
  padding: 48px 0;
  border-top: 1px solid var(--border);
}

.section-intro {
  color: var(--muted);
  max-width: 640px;
  margin: 0 0 32px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}

.card h3 {
  margin: 0 0 8px;
  font-size: 1.0625rem;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.875rem;
}

.callout {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px;
  text-align: center;
}

.callout h2 {
  margin-bottom: 12px;
}

.callout p {
  color: var(--muted);
  max-width: 520px;
  margin: 0 auto 24px;
}

.prose p {
  color: var(--muted);
  max-width: 720px;
}

.prose h3 {
  margin-top: 32px;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 24px;
  text-align: center;
  color: var(--muted);
  font-size: 0.8125rem;
}