:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-2: #f1f5f9;
  --border: #e2e8f0;
  --border-strong: #cbd5e1;
  --text: #0f172a;
  --text-muted: #475569;
  --text-dim: #94a3b8;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-soft: #dbeafe;
  --accent: #f97316;
  --success: #16a34a;
  --success-soft: #dcfce7;
  --info: #7c3aed;
  --info-soft: #ede9fe;
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 14px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1220;
    --surface: #111827;
    --surface-2: #0f172a;
    --border: #1f2937;
    --border-strong: #334155;
    --text: #f8fafc;
    --text-muted: #cbd5e1;
    --text-dim: #64748b;
    --primary: #3b82f6;
    --primary-hover: #60a5fa;
    --primary-soft: rgba(59, 130, 246, 0.18);
    --accent: #fb923c;
    --success: #22c55e;
    --success-soft: rgba(34, 197, 94, 0.16);
    --info: #a78bfa;
    --info-soft: rgba(167, 139, 250, 0.18);
  }
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 72px;
}

body {
  min-height: 100vh;
  font-family: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

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

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

a:focus-visible,
button:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--primary) 35%, transparent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

.shell {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  border-bottom: 1px solid var(--border);
  backdrop-filter: saturate(160%) blur(8px);
  -webkit-backdrop-filter: saturate(160%) blur(8px);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-3) 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--text);
  font-weight: 800;
}

.brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: var(--primary);
  color: #ffffff;
  font-size: 14px;
  font-weight: 800;
}

.brand-name {
  font-size: 15px;
  color: var(--text);
}

.nav {
  display: none;
  align-items: center;
  gap: var(--space-5);
}

.nav a {
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 700;
}

.nav a:hover {
  color: var(--text);
}

.nav .ext::after {
  content: " ↗";
  color: var(--text-dim);
  font-weight: 500;
}

@media (min-width: 780px) {
  .nav {
    display: flex;
  }
}

.page-hero {
  padding: var(--space-8) 0 var(--space-7);
  border-bottom: 1px solid var(--border);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin: 0 0 var(--space-5);
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.eyebrow .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
}

.page-hero h1 {
  max-width: 16ch;
  margin: 0 0 var(--space-5);
  font-size: clamp(34px, 6vw, 58px);
  line-height: 1.05;
  letter-spacing: -0.03em;
  font-weight: 800;
}

.page-hero .accent {
  color: var(--primary);
}

.lede {
  max-width: 64ch;
  margin: 0 0 var(--space-6);
  color: var(--text-muted);
  font-size: clamp(16px, 2vw, 19px);
  line-height: 1.65;
}

.hero-actions,
.button-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 12px 20px;
  border: 0;
  border-radius: var(--radius);
  font: inherit;
  font-size: 15px;
  font-weight: 800;
  cursor: pointer;
  transition: background-color 150ms ease, color 150ms ease, border-color 150ms ease, transform 80ms ease;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--primary);
  color: #ffffff;
}

.btn-primary:hover {
  background: var(--primary-hover);
  color: #ffffff;
}

.btn-ghost {
  border: 1px solid var(--border-strong);
  background: transparent;
  color: var(--text);
}

.btn-ghost:hover {
  border-color: var(--text);
  color: var(--text);
}

.section {
  padding: var(--space-8) 0;
  border-bottom: 1px solid var(--border);
}

.section-head {
  max-width: 64ch;
  margin: 0 0 var(--space-6);
}

.section-eyebrow {
  margin: 0 0 var(--space-2);
  color: var(--text-dim);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.section h2,
.section-head h2 {
  margin: 0 0 var(--space-3);
  font-size: clamp(26px, 4vw, 40px);
  line-height: 1.12;
  letter-spacing: -0.025em;
  font-weight: 800;
}

.section-head p,
.muted {
  color: var(--text-muted);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-4);
}

.card-grid.two {
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.info-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  min-height: 100%;
  padding: var(--space-5);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
}

.info-card h3 {
  margin: 0;
  font-size: 19px;
  line-height: 1.3;
}

.info-card p {
  margin: 0;
  color: var(--text-muted);
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: auto;
}

.tag,
.pill {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  min-height: 28px;
  padding: 5px 10px;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 800;
}

.tag.primary,
.pill.primary {
  background: var(--primary-soft);
  color: var(--primary);
}

.tag.success,
.pill.success {
  background: var(--success-soft);
  color: var(--success);
}

.article-body {
  max-width: 780px;
}

.article-body h2 {
  margin-top: var(--space-7);
}

.article-body p,
.article-body li {
  color: var(--text-muted);
}

.article-body ul,
.article-body ol {
  padding-left: 1.2rem;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--surface-2);
  color: var(--text);
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

tr:last-child td {
  border-bottom: 0;
}

.contact-list {
  display: grid;
  gap: var(--space-3);
  padding: 0;
  margin: 0;
  list-style: none;
}

.contact-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  min-height: 52px;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font-weight: 800;
}

.contact-list span {
  color: var(--text-muted);
  font-weight: 600;
}

.site-footer {
  padding: var(--space-7) 0;
  color: var(--text-muted);
}

.footer-grid {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-links a {
  color: var(--text-muted);
  font-weight: 700;
}

.footer-links a:hover {
  color: var(--text);
}

@media (max-width: 640px) {
  .topbar {
    position: static;
  }

  .shell {
    padding: 0 var(--space-4);
  }

  .page-hero {
    padding: var(--space-7) 0 var(--space-6);
  }

  .page-hero h1 {
    max-width: 100%;
    font-size: clamp(30px, 10vw, 40px);
  }

  .hero-actions,
  .button-row {
    align-items: stretch;
  }

  .hero-actions .btn,
  .button-row .btn {
    width: 100%;
    flex: 1 1 100%;
  }

  .section {
    padding: var(--space-7) 0;
  }

  .card-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .card-grid.two {
    grid-template-columns: 1fr;
  }

  .info-card {
    min-width: 0;
    padding: var(--space-4);
  }

  th,
  td {
    padding: 12px;
  }
}