@keyframes click-wave {
    0% {
        height: 25px;
        width: 25px;
        opacity: 0.35;
        position: relative;
    }

    100% {
        height: 100px;
        width: 100px;
        margin-left: -40px;
        margin-top: -40px;
        opacity: 0;
    }
}

.option-input {
    -webkit-appearance: none;
    -moz-appearance: none;
    -ms-appearance: none;
    -o-appearance: none;
    appearance: none;
    position: relative;
    top: 13.33333px;
    right: 0;
    bottom: 0;
    left: 0;
    height: 25px;
    width: 25px;
    transition: all 0.15s ease-out 0s;
    background: #cbd1d8;
    border: none;
    color: #fff;
    cursor: pointer;
    display: inline-block;
    margin-right: 0.5rem;
    outline: none !important;
    position: relative;
    /*z-index: 1000;*/
}

.option-input-checkbox {
    top: 0px !important;
}

.option-input:hover {
    background: #9faab7;
}

.option-input:checked {
    background: #40e0d0;
}

    .option-input:checked::before {
        height: 25px;
        width: 25px;
        position: absolute;
        content: '✔';
        display: inline-block;
        font-size: 20px;
        text-align: center;
        line-height: 25px;
    }

    .option-input:checked::after {
        -webkit-animation: click-wave 0.65s;
        -moz-animation: click-wave 0.65s;
        animation: click-wave 0.65s;
        background: #40e0d0;
        content: '';
        display: block;
        position: relative;
        z-index: 100;
    }

.option-input.radio {
    border-radius: 50%;
}

    .option-input.radio::after {
        border-radius: 50%;
    }