*
{
    font-family: monospace;
}

body
{
    background-color: black;
    color: white;
}

.container
{
    display: block;
    margin-left: auto;
    margin-right: auto;
    width: 800px;
    height: auto;
}

.btnNote
{
    margin: auto;
    height: 40px;
    width: 120px;
    background-color: white;
    color: black;
    border: none;
}

.btnOctave
{
    display: block;
    margin-left: auto;
    margin-right: auto;
    height: 40px;
    width: 40px;
    background-color: white;
    color: black;
    border: none;
}

#play
{
    display: block;
    margin-left: auto;
    margin-right: auto;
    height: 40px;
    width: 120px;
    justify-content: center;
    align-items: center;
    background-color: white;
    color: black;
    border: none;
}

.btnNote:hover, #play:hover, .btnOctave:hover, .btnOctave.active, .btnNote.active, #play.active
{
    background-color: gray;
}

#waves
{
    display: block;
    margin-left: auto;
    margin-right: auto;
    width: 100%;
    text-align: center;
}

#waves input[type="radio"]
{
    opacity: 0;
    position: fixed;
    width: 0;
}

#waves label
{
    display: inline-block;
    background-color: black;
    padding: 10px;
    width: 100px;
    border: 1px solid #ffffff;
}

#waves input[type="radio"]:checked + label
{
    background-color: white;
    color: black;
}

#waves input[type="radio"]:hover + label
{
    border: 1px dashed white;
}

.caption
{
    font-size: xx-small;
    text-align: center;
    position: relative;
    top: 10%;
}
#notes
{
    display: flex;
    margin-left: auto;
    margin-right: auto;
    padding-top: 20px;
}

#filters, #slider, #playButton, #octaveDisplay, #freqOut
{

    padding-bottom: 10px;
    display: block;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

#octave
{
    padding-top:20px;
    padding-bottom: 20px;
    display: block;
    margin-left: auto;
    margin-right: auto;
}

#octDisplay
{
    text-align: center;
}

#toggleGroup
{
    padding-top: 20px;
    display: block;
    margin-left: auto;
    margin-right: auto;
    color: black;
    border: none;
    text-align: center;
}

#toggleGroup table
{
    width: 100%;
    border: 1px solid white;
    border-collapse: collapse;
}

#toggleGroup table td, th
{
    border: 1px solid white;
    width: 100px;
    text-align: center;
}

.slider
{
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 25px;
    background: white;
    outline: none;
}

.slider_filters
{
    -webkit-appearance: none;
    appearance: none;
    width: 75%;
    height: 10px;
    background: white;
    outline: none;
}
  
.slider::-webkit-slider-thumb, .slider_filters::-webkit-slider-thumb
{
    -webkit-appearance: none;
    appearance: none;
    width: 25px;
    height: 25px;
    background: black;
    cursor: pointer;
}
  
.slider::-moz-range-thumb, .slider_filters::-webkit-slider-thumb
{
    width: 25px;
    height: 25px;
    background: black;
    cursor: pointer;
}
.slider::-webkit-slider-thumb:hover, .slider_filters::-webkit-slider-thumb:hover
{
    background: gray;
}

.switch
{
    position: relative;
    display: inline-block;
    width: 55px;
    height: 28px;
}
  
.switch input
{
    opacity: 0;
    width: 0;
    height: 0;
}
  
.toggle
{
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: black;
    -webkit-transition: .4s;
    transition: .4s;
}
  
.toggle:before
{
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    -webkit-transition: .2s;
    transition: .2s;
}
.toggle:hover
{
    background-color: gray;
}
  
input:checked + .toggle
{
    background-color: black;
}
  
input:checked + .toggle:before
{
    -webkit-transform: translateX(26px);
    -ms-transform: translateX(26px);
    transform: translateX(26px);
}