body {
  font-family: 'Segoe UI', sans-serif;
  background-color: #f5f9fb;
  color: #222;
  margin: 0;
  padding: 0;
}

.site-header {
  background-color: #d3e7f5;
  text-align: center;
  padding: 2.5rem;
  border-bottom: 2px solid #aacde3;
}
.site-header h1 {
  margin: 0;
  font-size: 2.6rem;
  color: #15577d;
}
.site-nav {
  margin-top: 0.75rem;
}
.site-nav a {
  color: #134c6a;
  text-decoration: none;
  font-weight: bold;
  margin: 0 18px;
}

.site-subtitle {
  background-color: #eaf5fc;
  padding: 1.25rem;
  text-align: center;
  font-size: 1.2rem;
  color: #444;
}

.content {
  max-width: 980px;
  margin: 2rem auto;
  padding: 0 2rem;
  line-height: 1.8;
}

.download-btn, .cta-card-btn {
  display: inline-block;
  background-color: #1e6a93;
  color: white;
  padding: 0.8rem 1.3rem;
  border-radius: 6px;
  text-decoration: none;
  font-weight: bold;
  margin-top: 1.2rem;
}
.download-btn:hover, .cta-card-btn:hover {
  background-color: #124f70;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 1.6rem;
  margin-top: 2.2rem;
}

.card {
  background: white;
  padding: 1.6rem;
  border: 1px solid #cce3f0;
  border-radius: 10px;
  box-shadow: 0 5px 12px rgba(0,0,0,0.05);
}
.card h3 {
  margin-top: 0;
  color: #145072;
}
.card blockquote {
  font-style: italic;
  color: #555;
  font-size: 0.95rem;
}

.site-footer {
  text-align: center;
  background-color: #d7edf9;
  padding: 2rem;
  font-size: 0.95rem;
  color: #444;
}