.button-black {
  background-color: black;
  border-color: black;
}

.button-white {
  background-color: white;
  color: black;
  border-color: black;
}


input[type=range] {
    /*removes default webkit styles*/
    -webkit-appearance: none;
    
    /*fix for FF unable to apply focus style bug */
    border: 1px solid white;
    
    /*required for proper track sizing in FF*/
    width: 300px;
}
input[type=range]::-webkit-slider-runnable-track {
    width: 300px;
    height: 20px;
    background: #ddd;
    border: none;
    border-radius: 3px;
}
input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    border: none;
    height: 16px;
    width: 16px;
    border-radius: 50%;
    background: goldenrod;
    margin-top: -4px;
}
input[type=range]:focus {
    outline: none;
}
input[type=range]:focus::-webkit-slider-runnable-track {
    background: #ccc;
}

input[type=range]::-moz-range-track {
    width: 300px;
    height: 20px;
    background: #ddd;
    border: none;
    border-radius: 3px;
}
input[type=range]::-moz-range-thumb {
    border: none;
    height: 16px;
    width: 16px;
    border-radius: 50%;
    background: goldenrod;
}

/*hide the outline behind the border*/
input[type=range]:-moz-focusring{
    outline: 1px solid white;
    outline-offset: -1px;
}

input[type=range]::-ms-track {
    width: 300px;
    height: 20px;
    
    /*remove bg colour from the track, we'll use ms-fill-lower and ms-fill-upper instead */
    background: transparent;
    
    /*leave room for the larger thumb to overflow with a transparent border */
    border-color: transparent;
    border-width: 6px 0;

    /*remove default tick marks*/
    color: transparent;
}
input[type=range]::-ms-fill-lower {
    background: #777;
    border-radius: 10px;
}
input[type=range]::-ms-fill-upper {
    background: #ddd;
    border-radius: 10px;
}
input[type=range]::-ms-thumb {
    border: none;
    height: 16px;
    width: 16px;
    border-radius: 50%;
    background: goldenrod;
}
input[type=range]:focus::-ms-fill-lower {
    background: #888;
}
input[type=range]:focus::-ms-fill-upper {
    background: #ccc;
}