input[type=text], select, textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid white;
    border-radius: 5px;
    box-sizing: border-box;
    resize: vertical;
}

input[type=submit] {
    background-color: lightgreen;
    color: black;
    padding: 10px 20px;
    margin-top: 5px;
    border: none;
    border-radius: 5px;
    float: right;
}

label {
    padding: 10px 10px 10px 0;
    display: inline-block;
}

.container {
    border-radius: 5px;
    background-color: lightgrey;
    padding: 20px;
}

.col25 {
    float: left;
    width: 25%;
    margin-top: 6px;
}

.col75 {
    float: left;
    width: 75%;
    margin-top: 6px;
}

.col37 {
    float: left;
    width: 37.5%;
    margin-top: 6px;
}

.row:after {
    content: "";
    display: table;
    clear: both;
}

@media screen and (max-width: 600px) {
    .col25, .col75, input[type=submit] {
        width: 100%;
        margin-top: 0;
    }
}

@media screen and (max-width: 600px) {
    .col25, .col37, .col37 {
        width: 100%;
        margin-top: 0;
    }
}