html {
    scroll-behavior: smooth;
}

#main-controls {
    border: 1px solid blue;
    padding: 15px;
    margin-top: 10px;
}
#main-controls button {
    background-color: blue;
    color: white;
}
#main-controls button:hover {
    background-color: #00FFFF;
    color: black;
}
#main-controls label {
    color: blue;
}
  
.collapsable {
    border: 1px solid #ccc;
    padding: 15px;
    margin-top: 10px;
    display: none;
}

.collapsable:has(:target) {
    display: block;
}