/* Reset */
body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background-color: #f5f7fa;
  color: #333;
}

/* Header */
header {
  background-color: #4f46e5;
  color: white;
  padding: 20px;
  text-align: center;
}

/* Navigation */
nav {
  background-color: #e5e7eb;
  padding: 10px;
  text-align: center;
}

nav a {
  margin: 0 15px;
  text-decoration: none;
  color: #4f46e5;
  font-weight: bold;
}

nav a:hover {
  text-decoration: underline;
}

/* Main content */
.container {
  max-width: 900px;
  margin: auto;
  padding: 30px;
}

.card {
  background-color: white;
  padding: 20px;
  margin-bottom: 20px;
  border-radius: 8px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.05);
}

/* Footer */
footer {
  background-color: #111827;
  color: white;
  text-align: center;
  padding: 15px;
  font-size: 14px;
}