.slider{
    width: 100%;
    height: 25px;
    outline: none;
    opacity: 0.8;
    background: rgb(150, 150, 150);
    -webkit-appearance: none;
    -webkit-transition: 0.25s;
    transition: opacity 0.25s;
}

.slider:hover {
    opacity: 1.0;
}

.slider::-webkit-slider-thumb {
    appearance: none;
    width: 25px;
    height: 25px;
    background: rgb(135,205,250);
    cursor: pointer;
    -webkit-appearance: none;
}

.slider::-moz-range-thumb {
    width: 25px;
    height: 25px;
    background: rgb(135,205,250);
    cursor: pointer;
}