#tahvel{
    background-color: bisque;
    width: 30%;
    height: 20%;
}
h1 {
    background-color: darkgray;
    border: solid 3pt lightslategrey;
    border-radius: 50px;
    text-align: center;
    font-family: Arial;
}
input[type=button]{
    background-color: dimgrey;
    color: black;
    padding: 20px 32px;
    border: 0;
}
input[type=button]hover{
    background-color: aliceblue;
}