:root {
  --brand: #023c69;
  --brand-light: #e6f4fe;
  --text: #101828;
  --muted: #6c7278;
  --border: rgba(16, 24, 40, 0.1);
  --bg: #f8fafc;
  --card: #ffffff;
  --max-width: 760px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
}

a {
  color: var(--brand);
}

a:hover {
  text-decoration: none;
}

.site-header {
  background: linear-gradient(135deg, #023c69 0%, #035a9e 100%);
  color: #fff;
  padding: 2rem 1.25rem 2.5rem;
}

.site-header-inner,
.page,
.site-footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: 0.02em;
}

.brand-mark {
  width: 2rem;
  height: 2rem;
  border-radius: 0.5rem;
  background: rgba(255, 255, 255, 0.15);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 800;
}

.app-badge {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.site-header h1 {
  margin: 0.75rem 0 0;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  line-height: 1.2;
}

.meta {
  margin: 0.75rem 0 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.9375rem;
}

.page {
  padding: 0 1.25rem 3rem;
}

.card {
  margin-top: -1.5rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 1.75rem 1.5rem;
  box-shadow: 0 8px 30px rgba(16, 24, 40, 0.06);
}

.card h2 {
  margin: 2rem 0 0.75rem;
  font-size: 1.125rem;
  line-height: 1.35;
  color: var(--brand);
}

.card h2:first-child {
  margin-top: 0;
}

.card p,
.card li {
  color: var(--text);
}

.card ul {
  margin: 0.5rem 0 0;
  padding-left: 1.25rem;
}

.card li + li {
  margin-top: 0.35rem;
}

.card ul ul {
  margin-top: 0.35rem;
}

.contact-box p {
  margin: 0;
}

.contact-box p + p {
  margin-top: 0.5rem;
}

.contact-box a {
  font-weight: 600;
  word-break: break-word;
}

.toc {
  margin: 0 0 1.5rem;
  padding: 1rem 1.1rem;
  border-radius: 0.75rem;
  background: var(--brand-light);
  border: 1px solid rgba(2, 60, 105, 0.08);
}

.toc strong {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--brand);
}

.toc ol {
  margin: 0;
  padding-left: 1.15rem;
}

.toc li + li {
  margin-top: 0.25rem;
}

.contact-box {
  margin-top: 1.5rem;
  padding: 1rem 1.1rem;
  border-radius: 0.75rem;
  background: #f1f5f9;
  border: 1px solid var(--border);
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 1.25rem 2rem;
  color: var(--muted);
  font-size: 0.875rem;
}

.site-footer a {
  font-weight: 600;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin-bottom: 0.75rem;
}

@media (min-width: 640px) {
  .card {
    padding: 2rem 2.25rem;
  }
}