table {
    width: 70%;
    border-collapse: collapse;
}
th, td {
    border: 1px solid black;
    padding: 8px;
    text-align: left;
    color: black;
    font-size: large;
}

.arak{
    margin-top: 30px;
    margin-bottom: 30px;
    margin-left: 30px;
    margin-right: 30px;
}


.caa { max-width: 400px; margin: 10px auto; padding: 20px; border: 1px solid #ccc; border-radius: 5px; }
        input, select { margin-top: 10px; padding: 10px; width: 100%; }
        .calculator-box { border: 1px solid #ccc; padding: 15px; margin-bottom: 10px; }
        .btnasd { margin-top: 10px; padding: 10px; width: 100%; }