#tahvel{
    background-color: deepskyblue;
    width: 40%;
    height: 30%;
    border: mediumpurple 3px solid;
}
h1{
    background-color: mediumpurple;
    text-align: center;
    font-family: serif, Verdana;
    height: 50px;
}
input[type=button]{
    background-color: mediumpurple;
    color: black;
    padding: 20px 32px;
}
input[type=button]:hover{
    background-color: orange;
}