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

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f5f7fa;
  color: #1f2933;
  line-height: 1.6;
}

a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  width: 100%;
  max-width: 980px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.site-header {
  background: #0f172a;
  color: #f9fafb;
  position: sticky;
  top: 0;
  z-index: 20;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 0;
}

.branding h1 {
  margin: 0;
  font-size: 1.4rem;
  letter-spacing: 0.03em;
}

.tagline {
  margin: 0.15rem 0 0;
  font-size: 0.85rem;
  color: #cbd5f5;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 1.1rem;
  margin: 0;
  padding: 0;
  font-size: 0.95rem;
}

.nav-links a {
  color: #e5e7eb;
  font-weight: 500;
}

.nav-links a:hover {
  color: #ffffff;
}

.hero {
  background: linear-gradient(135deg, #0f172a, #1e293b);
  color: #f9fafb;
  padding: 3rem 0;
}

.hero h2 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.hero p {
  max-width: 40rem;
  color: #e5e7eb;
}

.section {
  padding: 2.5rem 0;
}

.section-alt {
  background: #ffffff;
}

.section h2 {
  margin-top: 0;
  font-size: 1.6rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.card {
  background: #f9fafb;
  padding: 1rem;
  border: 1px solid #e5e7eb;
  border-radius: 0.75rem;
}

.doc-list {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
}

.doc-list li {
  padding: 0.6rem 0;
  border-bottom: 1px solid #e5e7eb;
}

.two-column {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  margin-top: 1rem;
}

.notice {
  font-size: 0.8rem;
  color: #6b7280;
  margin-top: 0.4rem;
}

.site-footer {
  background: #0f172a;
  color: #9ca3af;
  padding: 1.5rem 0;
  text-align: center;
  margin-top: 2rem;
  font-size: 0.9rem;
}

.small { font-size: 0.85rem; }
.muted { color: #6b7280; }

@media (max-width: 720px) {
  .header-inner { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
}