styles.css

* {
    font-family: Arial, sans-serif;
}

html, body{
    min-height: 100%
}

body {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

#title {
    font-size: 28px;
    margin-top: 10px;
    width: 100%;
    text-align: center;
}

#description {
    margin-top: 25px;
}

#description a {
    text-decoration: none;
    color: #9b4d02;
    text-align: center;
}

#mode {
    border-radius: 10px;
    padding: .5% 4%;
    font-size: 17px;
}

#mode-container {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%
}

#tooltip{
    position: absolute;
    visibility: hidden;
    height: auto;
    width: auto;
    border: 1px solid whitesmoke;
    border-radius: 10px;
    padding: 1% 4%;
    background-color: whitesmoke;
    opacity: .8;
    z-index: 999;
}

.canton {
    stroke: lightgray;
}

.canton:hover {
    opacity: .5;
    cursor: pointer;
}

.slidecontainer {
    width: 60%;
    display: flex;
    align-items: center;
}

.slidecontainer > label {
    font-weight: bold;
}

.slidecontainer > label:first-child {
    margin-right: 2%;
}

.slidecontainer > label:last-child {
    margin-left: 2%;
}

.slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 25px;
    background: #d3d3d3;
    outline: none;
    opacity: 0.7;
    -webkit-transition: .2s;
    transition: opacity .2s;
    border-radius: 10px;
}

.slider:hover {
    opacity: 1;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 25px;
    height: 25px;
    background: #04AA6D;
    cursor: pointer;
    border-radius: 15px;
}

.slider::-moz-range-thumb {
    width: 25px;
    height: 25px;
    background: #04AA6D;
    cursor: pointer;
}