body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background: #f4f6f9;
  color: #222;
}

header {
  background: linear-gradient(135deg, #3a7bd5, #3a6073);
  color: white;
  padding: 2.5rem 1rem;
  text-align: center;
}

header h1 {
  margin: 0;
  font-size: 2.2rem;
}

main {
  max-width: 1100px;
  margin: auto;
  padding: 2rem 1rem;
}

.card {
  background: white;
  padding: 1.5rem 2rem;
  margin-bottom: 1.5rem;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}

.card h2 {
  margin-top: 0;
  color: #2c5282;
}

.dashboard {
  margin-top: 1.5rem;
}

.dashboard h3 {
  margin-bottom: 0.5rem;
  color: #334155;
}

iframe {
  width: 100%;
  height: 480px;
  border-radius: 8px;
  border: 1px solid #ddd;
  background: white;
}

footer {
  text-align: center;
  color: #666;
  padding: 1.5rem;
  font-size: 0.9rem;
}