input[type="checkbox"] {
    display: none;
}

input[type="checkbox"] + label {
    display: block;
    position: relative;
    padding-right: 35px;
    margin-bottom: 20px;
    font: 14px/20px 'Open Sans', Arial, sans-serif;
    color: #ddd;
    cursor: pointer;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

input[type="checkbox"] + label:last-child {
    margin-bottom: 0;
}

input[type="checkbox"] + label:before {
    content: '';
    display: block;
    width: 20px;
    height: 20px;
    border: 1px solid green;
    position: absolute;
    right: 0;
    top: 0;
    opacity: .6;
    -webkit-transition: all .12s, border-color .08s;
    transition: all .12s, border-color .08s;
}

input[type="checkbox"]:checked + label:before {
    width: 10px;
    right: 5px;
    border-radius: 0;
    opacity: 1;
    border-top-color: transparent;
    border-left-color: transparent;
    -webkit-transform: rotate(45deg);
    transform: rotate(45deg);
}

@media screen and (max-width: 480px) {
    #intro {
        margin-left: 22px;
    }
}

.form-check {
    display: none;
    padding-left: 0;
}

.form-check i {
    font-size: 24px;
    color: green;
}

a:hover {
    text-decoration: none;
    color: white;
}