.required label::after {
    content: " *";
}

/* The slider itself */
.slider {
    margin-top: 6px;
    margin-bottom: 6px;
    width: 100%;
}

/* Mouse-over effects */
.slider:hover {
    opacity: 1; /* Fully shown on mouse-over */
}

/* The slider handle (use -webkit- (Chrome, Opera, Safari, Edge) and -moz- (Firefox) to override default look) */
.slider::-webkit-slider-thumb {
    -webkit-appearance: none; /* Override default look */
    appearance: none;
    border-radius: 50%;
    height: 17px;
    width: 17px; /* Set a specific slider handle width */
    background: #4CAF50; /* Green background */
    cursor: pointer; /* Cursor on hover */
}

.slider::-moz-range-thumb {
    -moz-appearance: none;
    border-radius: 50%;
    height: 15px;
    width: 15px; /* Set a specific slider handle width */
    background: #4CAF50; /* Green background */
    cursor: pointer; /* Cursor on hover */
}