#kalk1, #kalk2, #kalk3{
    width: 350px;
    border: 1pt solid blue;
    border-radius: 15px;
    background-color: lightgreen;
    padding: 1%;
}
input[type="number"] {
    width: 40px;
    height: 30px;
    border: 1px solid blueviolet;
    border-radius: 20px;
    background-color: yellow;
    color: #333;
    appearance: none;
    text-align: center;
}
input[type="button"] {
    width: 80px;
    height: 30px;
    border: 1px solid blueviolet;
    border-radius: 20px;
    background-color: yellow;
    color: #333;
    appearance: none;
    text-align: center;
}

input[type="number"]:focus,
input[type="number"]:hover {
    border: 1px solid #999;
}