body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #f4f6f8;
  color: #333;
}

/* Navigatie */
nav {
  background: #2c3e50;
  padding: 15px;
  text-align: center;
}

nav a {
  color: white;
  margin: 0 10px;
  text-decoration: none;
  font-weight: bold;
}

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

/* Inhoud */
main {
  max-width: 900px;
  margin: auto;
  padding: 20px;
}

/* Blokken */
.card {
  background: white;
  padding: 20px;
  margin: 20px 0;
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

/* Titels */
h1 {
  text-align: center;
}