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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: #1a2332;
  background: linear-gradient(180deg, #edf1f9 0%, #f7f9fc 40%, #ffffff 100%);
}

a {
  color: #2563eb;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  width: min(100% - 2rem, 720px);
  margin-inline: auto;
}

.site-header {
  padding: 1.25rem 0;
  border-bottom: 1px solid rgba(37, 99, 235, 0.12);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(8px);
}

.brand {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #1e40af;
  text-decoration: none;
}

.brand:hover {
  text-decoration: none;
  color: #1d4ed8;
}

.main-content {
  flex: 1;
  padding: 2rem 0 3rem;
}

.page-card {
  background: #ffffff;
  border: 1px solid rgba(37, 99, 235, 0.1);
  border-radius: 12px;
  padding: clamp(1.25rem, 4vw, 2rem);
  box-shadow: 0 4px 24px rgba(30, 64, 175, 0.06);
}

.hero {
  text-align: center;
  padding: clamp(2rem, 6vw, 3.5rem) 0 1rem;
}

.hero h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(2rem, 6vw, 2.75rem);
  letter-spacing: -0.03em;
  color: #1e40af;
}

.hero .subtitle {
  margin: 0 0 1.25rem;
  font-size: 1.125rem;
  color: #475569;
}

.hero .description {
  margin: 0 auto 2rem;
  max-width: 36rem;
  color: #334155;
}

.link-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.75rem;
  text-align: left;
  max-width: 20rem;
  margin-inline: auto;
}

.link-list a {
  display: block;
  padding: 0.75rem 1rem;
  background: #f8fafc;
  border: 1px solid rgba(37, 99, 235, 0.12);
  border-radius: 8px;
  font-weight: 500;
}

.link-list a:hover {
  background: #eff6ff;
  text-decoration: none;
}

h1.page-title {
  margin: 0 0 0.5rem;
  font-size: clamp(1.5rem, 4vw, 2rem);
  letter-spacing: -0.02em;
  color: #1e293b;
}

.meta {
  margin: 0 0 1.5rem;
  color: #64748b;
  font-size: 0.9375rem;
}

.notice {
  margin: 0 0 1.5rem;
  padding: 0.875rem 1rem;
  background: #fffbeb;
  border: 1px solid #fde68a;
  border-radius: 8px;
  color: #92400e;
  font-size: 0.9375rem;
}

.prose h2 {
  margin: 2rem 0 0.75rem;
  font-size: 1.25rem;
  color: #1e293b;
}

.prose h3 {
  margin: 1.25rem 0 0.5rem;
  font-size: 1.0625rem;
  color: #334155;
}

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

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

.prose li {
  margin-bottom: 0.35rem;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 1rem;
  font-size: 0.9375rem;
}

.prose th,
.prose td {
  border: 1px solid #e2e8f0;
  padding: 0.5rem 0.75rem;
  text-align: left;
  vertical-align: top;
}

.prose th {
  background: #f8fafc;
  font-weight: 600;
}

.prose hr {
  border: none;
  border-top: 1px solid #e2e8f0;
  margin: 2rem 0;
}

.prose code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.875em;
  background: #f1f5f9;
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

.site-footer {
  padding: 1.5rem 0 2rem;
  border-top: 1px solid rgba(37, 99, 235, 0.1);
  background: rgba(255, 255, 255, 0.7);
}

.footer-inner {
  text-align: center;
}

.footer-brand {
  margin: 0 0 0.75rem;
  font-weight: 600;
  color: #1e40af;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem 1.25rem;
  margin-bottom: 0.75rem;
}

.footer-nav a {
  font-size: 0.9375rem;
}

.footer-copy {
  margin: 0;
  font-size: 0.8125rem;
  color: #94a3b8;
}

@media (max-width: 480px) {
  .prose table {
    display: block;
    overflow-x: auto;
  }
}