* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, "Helvetica Neue", sans-serif;
  line-height: 1.7;
  color: #1f2937;
  background: #f3f7fb;
}

.container {
  width: min(1100px, 92%);
  margin: 0 auto;
}

.site-header {
  background: linear-gradient(135deg, #0f4c81, #1d75b8);
  color: #ffffff;
  padding: 32px 0;
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.site-header h1 {
  margin: 0;
  font-size: 2.1rem;
}

.site-header p {
  margin: 6px 0 0;
  color: #e6f1fb;
}

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

nav a {
  color: #ffffff;
  text-decoration: none;
  padding: 8px 14px;
  border: 1px solid rgba(255, 255, 255, 0.45);
  border-radius: 999px;
}

nav a:hover {
  background: rgba(255, 255, 255, 0.16);
}

main {
  padding: 36px 0;
}

.card {
  background: #ffffff;
  border-radius: 18px;
  padding: 28px;
  margin-bottom: 24px;
  box-shadow: 0 10px 30px rgba(15, 76, 129, 0.08);
  border: 1px solid #e5edf5;
}

.hero {
  padding: 40px 32px;
}

.label {
  display: inline-block;
  margin: 0 0 8px;
  color: #0f4c81;
  font-weight: bold;
}

h2 {
  margin-top: 0;
  color: #0f4c81;
  font-size: 1.7rem;
}

h3 {
  margin-top: 28px;
  color: #164e7a;
  font-size: 1.25rem;
}

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

.features-grid div {
  background: #f3f8fd;
  border: 1px solid #dbeafe;
  border-radius: 14px;
  padding: 14px 16px;
}

.highlight-card {
  background: #eef7ff;
}

.button {
  display: inline-block;
  margin-top: 8px;
  background: #0f4c81;
  color: #ffffff;
  text-decoration: none;
  padding: 10px 18px;
  border-radius: 999px;
  font-weight: bold;
}

.button:hover {
  background: #0b3d66;
}

a {
  color: #0f4c81;
}

.document {
  max-width: 850px;
  margin-right: auto;
  margin-left: auto;
}

.updated {
  color: #64748b;
  font-size: 0.95rem;
}

ul {
  padding-right: 22px;
}

footer {
  padding: 24px 0;
  color: #64748b;
  text-align: center;
}

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

  .site-header h1 {
    font-size: 1.8rem;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .card,
  .hero {
    padding: 22px;
  }
}