input:checked + label {
    border: solid 2px #1e88e5;
    color: #F00;
}

[type=checkbox] + label:before, [type=checkbox]:not(.filled-in) + label:after {
    display: none;
}

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

.check {
    visibility: hidden;
}

input:checked + label .check {
    visibility: visible;
}

input.checkbox:checked + label:before {
    content: "";
}