.header {
 background: #99ff66; 
  display: block; margin: 0 auto;
    width: 100%;
}




.whatsapp-button-container {
    text-align: center;
    margin-top: 20px;
}

.whatsapp-button {
    display: inline-block;
    background-color: #25d366;
    color: white;
    font-size: 16px;
    padding: 10px 20px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: bold;
    display: flex;
    align-items: center;
}
/* Hintergrundfarbe der gesamten Leiste */
.navbar {
    background-color: #3498db;
}