style.css

@import url('https://fonts.googleapis.com/css2?family=Pragati+Narrow:wght@700&display=swap');
body {
    margin: 0;
    padding: 0;
    font-family: Arial, Helvetica, sans-serif;
}

tbody {
    width: 100%;
}

#myTable {
    border-collapse: collapse;
    width: 84.02%;
    border: 1px solid #ddd;
    font-size: 14px;
    margin-left: 5%;
    margin-right: 0%;
    margin-top: 100px;
}

#myTable th, #myTable td {
    text-align: left;
    /* Left-align text */
    padding: 12px;
    /* Add padding */
}

#myTable tr {
    /* Add a bottom border to all table rows */
    border-bottom: 1px solid #ddd;
}

#myTable tr.header, #myTable tr:hover {
    /* Add a grey background color to the table header and on hover */
    background-color: #f1f1f1;
}

input:invalid {
    border: 3px solid red;
}

.kemler {
    height: 250px;
    width: 395px;
    background-color: orange;
    text-align: center;
    align-items: center;
    margin: auto;
    border: black;
    border-style: solid;
    margin-top: 75px;
    font-family: 'Pragati Narrow', sans-serif;
}

.lineone {
    text-align: center;
    padding-top: 20px;
    padding-bottom: 20px;
    font-size: 50px;
    margin: auto;
    border-bottom: black solid;
}

.linetwo {
    text-align: center;
    padding-top: 20px;
    padding-bottom: 20px;
    font-size: 50px;
    margin: auto;
}

#myInput {
    width: 50%;
    /* Full-width */
    text-align: center;
    color: black;
    background-color: transparent;
    border: none;
    font-size: 50px;
    outline: none;
    font-family: 'Pragati Narrow', sans-serif;
}

#myInput:focus {
    border: none;
    outline: none;
}

input::-webkit-outer-spin-button, input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

/* Firefox */

input[type=number] {
    -moz-appearance: textfield;
}