:root {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --border: #e5e7eb;
  --accent: #0ea5e9;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
}

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

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

.site-header {
  background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 55%, #0ea5e9 100%);
  color: #fff;
  padding: 2.5rem 1.25rem 2rem;
}

.site-header .wrap,
main.wrap,
.site-footer .wrap {
  max-width: 880px;
  margin: 0 auto;
}

.site-header h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.6rem, 4vw, 2.2rem);
}

.site-header p {
  margin: 0;
  opacity: 0.95;
  max-width: 52ch;
}

nav.top-nav {
  margin-top: 1.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

nav.top-nav a {
  color: #fff;
  text-decoration: none;
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.25);
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  font-size: 0.95rem;
}

nav.top-nav a:hover,
nav.top-nav a.active {
  background: rgba(255, 255, 255, 0.28);
}

main.wrap {
  padding: 2rem 1.25rem 3rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.5rem;
  margin-bottom: 1.25rem;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.05);
}

.card h2 {
  margin-top: 0;
  color: #111827;
  font-size: 1.25rem;
}

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

.muted {
  color: var(--muted);
}

.feature-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.feature {
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
}

.feature strong {
  display: block;
  margin-bottom: 0.35rem;
}

.contact-box {
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-radius: 12px;
  padding: 1rem 1.25rem;
}

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

.site-footer {
  border-top: 1px solid var(--border);
  background: #fff;
  padding: 1.25rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.site-footer a {
  color: var(--muted);
}

code {
  background: #f3f4f6;
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  font-size: 0.92em;
}