body {
    font-family: 'Red Hat Display', sans-serif;
}
.header {
    margin: 20px;
}

button {
    font-family: 'Red Hat Display', sans-serif;
    background: none;
    border: 1px solid black;
    border-radius: 5px;
    text-decoration: none;
    padding: 15px;
    outline: none;
    transition-duration: 0.4s;
}

button:hover {
    background-color: #4CAF50; /* Green */
    color: white;
    border: 1px solid #4CAF50;
  }