:root {
  color-scheme: light dark;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  --accent: #c8102e;
  --accent-soft: rgba(200, 16, 46, 0.12);
  --bg: #f4f4f5;
  --card: #ffffff;
  --text: #18181b;
  --muted: #71717a;
  --border: #e4e4e7;
  --max: 720px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #09090b;
    --card: #18181b;
    --text: #fafafa;
    --muted: #a1a1aa;
    --border: #3f3f46;
    --accent-soft: rgba(200, 16, 46, 0.22);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
}

a { color: var(--accent); }
a:hover { text-decoration: none; }

.skip-link {
  position: absolute;
  left: -9999px;
}

.skip-link:focus {
  left: 16px;
  top: 16px;
  z-index: 100;
  background: var(--card);
  padding: 8px 12px;
  border-radius: 8px;
}

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

.header-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  text-decoration: none;
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.95rem;
}

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

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

.nav-toggle {
  display: none;
  border: 1px solid var(--border);
  background: transparent;
  color: inherit;
  border-radius: 8px;
  padding: 8px 12px;
  font: inherit;
  cursor: pointer;
}

.page-main {
  padding: 40px 20px 64px;
}

.container {
  max-width: var(--max);
  margin: 0 auto;
}

.prose h1 {
  margin: 0 0 8px;
  font-size: clamp(1.75rem, 4vw, 2.2rem);
  line-height: 1.2;
}

.prose h2 {
  margin: 2rem 0 0.75rem;
  font-size: 1.25rem;
}

.prose h3 {
  margin: 1.25rem 0 0.5rem;
  font-size: 1.05rem;
}

.prose p,
.prose ul,
.prose ol {
  margin: 0 0 1rem;
}

.prose ul,
.prose ol {
  padding-left: 1.25rem;
}

.updated {
  color: var(--muted);
  margin-bottom: 1.5rem !important;
}

.scope-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  margin: 1rem 0 1.5rem;
}

.scope-table th,
.scope-table td {
  border: 1px solid var(--border);
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}

.scope-table th {
  background: var(--accent-soft);
}

.limited-use {
  background: var(--accent-soft);
  border-left: 4px solid var(--accent);
  padding: 14px 16px;
  border-radius: 0 12px 12px 0;
  margin: 1.5rem 0;
}

.limited-use p:last-child {
  margin-bottom: 0;
}

.btn {
  display: inline-block;
  border-radius: 12px;
  padding: 12px 18px;
  font-weight: 600;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #fff !important;
}

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

.hero {
  max-width: 960px;
  margin: 0 auto;
  padding: 48px 20px 24px;
}

.hero-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 32px;
}

.hero .eyebrow {
  margin: 0 0 8px;
  font-size: 0.85rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.hero h1 {
  margin: 0 0 12px;
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  line-height: 1.15;
}

.hero p {
  margin: 0 0 20px;
  color: var(--muted);
  max-width: 52ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.feature-grid {
  max-width: 960px;
  margin: 0 auto;
  padding: 8px 20px 48px;
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.feature-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
}

.feature-card h2 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.feature-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.faq-item {
  border-top: 1px solid var(--border);
  padding-top: 1rem;
  margin-top: 1rem;
}

.faq-item:first-of-type {
  border-top: 0;
  padding-top: 0;
  margin-top: 0;
}

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--card);
  padding: 24px 20px;
}

.footer-bottom {
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-bottom p { margin: 0; }

@media (max-width: 640px) {
  .nav-toggle { display: block; }

  .site-nav {
    display: none;
    width: 100%;
    flex-direction: column;
    padding-top: 8px;
  }

  .site-nav.is-open { display: flex; }

  .header-inner { flex-wrap: wrap; }
}