stylesss.css

* {
    box-sizing: border-box;
}
table {
    padding: 0 3px;
}
table td {
    width: 100%;
    display: block;
}
label {
    display: block;
    padding-bottom: 5px;
}
span {
    color: #2FB3CD;
}
input {
    border: 1px solid #ccc;
    width: 100%;
    padding: 10px;
    outline: none;
    margin-bottom: 15px;
}
input[type=submit] {
    background-color: #0DBFDC;
    color: white;
    font-weight: bold;
    margin-top: 40px;
    border-radius: 4px;
    width: 100%;
}
textarea {
    border: 1px solid #ccc;
    width: 100%;
    padding: 10px;
    outline: none;
    min-height: 80px;
    resize: vertical;
}
@media only screen and (min-width: 768px) {
    table {
        padding: 30px 80px 0 80px;
    }
    table td {
        width: 50%;
        display: inline-block;
    }
    textarea, input {
        width: 80%;
    }
    input[type=submit] {
        width: fit-content;
    }
}