.header {
    text-align: center;
}
.header h1 {
    font-family: arial;
}
.header p {
    font-family: arial;
}
.move {
    padding: 10px;
}
.buttontype {
    text-align: center;
}
.btn {
    width: 115px;
    height: 45px;
    background-color: transparent;
    border-radius: 10px;
    border: 1px solid;
}
.btn:hover {
    border-radius: 6px;
    cursor: pointer;
    background-color: rgba(192, 192, 192, 0.205);
}
.classes {
    border: 1px solid;
    padding: 20px;
    display: none;
}
.classes h1 {
    text-align: center;
    font-family: arial;
}
.buttons {
    text-align: center;
}
.ais {
    border: 1px solid;
    padding: 20px;
    display: none;
}
.ais h1 {
    text-align: center;
    font-family: arial;
}