* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: #1f2937;
  background: #f3f4f6;
  line-height: 1.6;
}

a {
  color: #0b5fff;
}

header {
  background: #0f172a;
  color: #ffffff;
  border-bottom: 4px solid #0b5fff;
}

.topbar {
  max-width: 1120px;
  margin: 0 auto;
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  margin: 0;
  font-size: 1.25rem;
}

.nav {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.nav a {
  color: #0f172a;
  text-decoration: none;
  background: #ffffff;
  border: 1px solid #cbd5e1;
  padding: 6px 10px;
  border-radius: 8px;
}

.nav a:hover {
  background: #e2e8f0;
}

main {
  max-width: 1120px;
  margin: 24px auto;
  padding: 0 20px;
}

.hero,
.section,
.notice {
  background: #ffffff;
  border: 1px solid #d1d5db;
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 16px;
}

.hero h2,
.section h2,
.notice h2 {
  margin-top: 0;
  color: #0f172a;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.card {
  border: 1px solid #d1d5db;
  border-radius: 10px;
  padding: 14px;
  background: #f9fafb;
}

ul {
  margin-top: 6px;
}

.footer-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 6px 0 0;
}

footer {
  max-width: 1120px;
  margin: 0 auto 24px;
  padding: 0 20px;
}

.legal {
  background: #ffffff;
  border: 1px solid #d1d5db;
  border-radius: 12px;
  padding: 16px 20px;
}

.muted {
  color: #6b7280;
}

@media (max-width: 900px) {
  .grid {
    grid-template-columns: 1fr;
  }
}