body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
  background: #f5f5f5;
}

.header {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 60px 40px;
  border-radius: 12px;
  margin-bottom: 40px;
  text-align: center;
}

.header h1 {
  margin: 0;
  font-size: 2.5em;
  font-weight: 700;
}

.header p {
  margin: 10px 0 0 0;
  font-size: 1.2em;
  opacity: 0.9;
}

.viz-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 30px;
  margin: 30px 0;
}

.viz-card {
  background: white;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
  transition: transform 0.3s, box-shadow 0.3s;
}

.viz-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 15px rgba(0,0,0,0.2);
}

.viz-image {
  width: 100%;
  height: auto;
  display: block;
  border-bottom: 1px solid #eee;
}

.viz-content {
  padding: 20px;
}

.viz-title {
  font-size: 1.3em;
  font-weight: 600;
  color: #333;
  margin: 0 0 15px 0;
  line-height: 1.4;
}

.viz-links {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.viz-links a {
  padding: 8px 16px;
  background: #667eea;
  color: white;
  text-decoration: none;
  border-radius: 6px;
  font-size: 0.85em;
  transition: background 0.3s;
}

.viz-links a:hover {
  background: #5568d3;
}

.footer {
  text-align: center;
  padding: 40px 20px;
  color: #666;
  margin-top: 40px;
}

.stats-box {
  background: white;
  padding: 20px;
  border-radius: 8px;
  text-align: center;
  margin: 30px 0;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.stats-number {
  font-size: 3em;
  font-weight: 700;
  color: #667eea;
  margin: 0;
}

.stats-label {
  color: #666;
  margin: 5px 0 0 0;
}