:root[data-theme="light"] {
  --bg: #FFFFFF;
  --bg-raised: #F8FAFC;
  --bg-sunken: #F1F5F9;
  --text: #111827;
  --text-muted: #475569;
  --text-faint: #64748B;
  --border: #E2E8F0;
  --border-strong: #CBD5E1;
  --link: #1D4ED8;
  --link-hover: #1E40AF;
  --primary-bg: #1D4ED8;
  --primary-text: #FFFFFF;
  --primary-hover: #1E40AF;
  --code-bg: #F1F5F9;
  --code-text: #0F172A;
  --code-border: #E2E8F0;
  --input-bg: #FFFFFF;
  --input-border: #CBD5E1;
  --focus-ring: #1D4ED8;
  --error-text: #B91C1C;
  --error-bg: #FEF2F2;
  --error-border: #FECACA;
  --success-text: #166534;
}

:root[data-theme="dark"] {
  --bg: #0B1220;
  --bg-raised: #111C33;
  --bg-sunken: #080E1B;
  --text: #E5E7EB;
  --text-muted: #9CA3AF;
  --text-faint: #7C8AA0;
  --border: #243349;
  --border-strong: #3B4F73;
  --link: #93C5FD;
  --link-hover: #BFDBFE;
  --primary-bg: #2563EB;
  --primary-text: #FFFFFF;
  --primary-hover: #1D4ED8;
  --code-bg: #131F38;
  --code-text: #E5E7EB;
  --code-border: #243349;
  --input-bg: #0B1220;
  --input-border: #3B4F73;
  --focus-ring: #93C5FD;
  --error-text: #FCA5A5;
  --error-bg: #2A1215;
  --error-border: #7F1D1D;
  --success-text: #86EFAC;
}

* { box-sizing: border-box; }

html {
  background: var(--bg);
  color: var(--text);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--primary-bg);
  color: var(--primary-text);
  padding: 12px 16px;
  z-index: 100;
}

.skip-link:focus { left: 0; }

a { color: var(--link); }
a:hover { color: var(--link-hover); }

a:focus-visible, button:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

.site-header {
  position: sticky;
  top: 0;
  min-height: 56px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  z-index: 10;
}

.header-inner {
  max-width: 72ch;
  margin: 0 auto;
  padding: 8px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
  font-size: 18px;
  min-height: 44px;
}

.brand .tld { color: var(--text-muted); font-weight: 700; }
.brand svg { color: var(--text); }

.header-spacer { flex: 1; }

.theme-group {
  display: inline-flex;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  overflow: hidden;
}

.theme-group button {
  appearance: none;
  border: 0;
  background: var(--bg);
  color: var(--text-muted);
  font: inherit;
  font-size: 14px;
  padding: 10px 12px;
  min-height: 44px;
  cursor: pointer;
}

.theme-group button + button { border-left: 1px solid var(--border); }

.theme-group button[aria-pressed="true"] {
  background: var(--bg-sunken);
  color: var(--text);
  font-weight: 600;
}

.header-cta {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 14px;
}

main {
  max-width: 72ch;
  margin: 0 auto;
  padding: 32px 16px 64px;
}

.prose { max-width: 68ch; }

.eyebrow {
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin: 0 0 8px;
}

h1 {
  font-size: 40px;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
}

h2 {
  font-size: 20px;
  line-height: 1.2;
  margin: 40px 0 12px;
}

.subhead {
  color: var(--text-muted);
  font-size: 18px;
  margin: 0 0 24px;
}

.actions { display: flex; gap: 12px; flex-wrap: wrap; margin: 0 0 32px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 20px;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
}

.btn-primary { background: var(--primary-bg); color: var(--primary-text); }
.btn-primary:hover { background: var(--primary-hover); color: var(--primary-text); }

.btn-secondary {
  background: transparent;
  color: var(--link);
  border-color: var(--border-strong);
}
.btn-secondary:hover { color: var(--link-hover); border-color: var(--link); }

.card {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin: 0 0 16px;
}

.card h2, .card h3 { margin-top: 0; }

.price-row { display: flex; gap: 12px; flex-wrap: wrap; }
.price-box { flex: 1 1 220px; }

.status-line { color: var(--text-muted); font-size: 14px; }
.status-line strong { color: var(--text); }

pre.code {
  background: var(--code-bg);
  color: var(--code-text);
  border: 1px solid var(--code-border);
  border-radius: 8px;
  padding: 16px;
  overflow-x: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 14px;
  line-height: 1.5;
}

.code-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: 24px 0 0;
}

.code-head span { color: var(--text-muted); font-size: 14px; }

.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 44px;
  padding: 8px 12px;
  background: var(--bg-raised);
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  font: inherit;
  font-size: 14px;
  cursor: pointer;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 16px 48px;
}

.footer-inner {
  max-width: 72ch;
  margin: 0 auto;
  color: var(--text-muted);
  font-size: 14px;
}

.footer-brand { font-weight: 700; letter-spacing: -0.02em; color: var(--text); font-size: 20px; }
.footer-brand .tld { color: var(--text-muted); }

.footer-inner nav { display: flex; gap: 24px; flex-wrap: wrap; margin: 12px 0; }
.footer-inner nav a { min-height: 44px; display: inline-flex; align-items: center; }

.toc { list-style: none; padding: 0; margin: 0 0 24px; }
.toc li { margin: 0; }
.toc a { display: inline-flex; align-items: center; min-height: 44px; }

table.facts { border-collapse: collapse; width: 100%; margin: 16px 0; }
table.facts th, table.facts td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
table.facts th { color: var(--text-muted); font-weight: 600; width: 30%; }

@media (max-width: 480px) {
  h1 { font-size: 28px; }
  main { padding: 24px 16px 48px; }
  .btn-primary { width: 100%; }
  .header-cta span.cta-short { display: inline; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
}