styles.css

/* common ------------------------------------ */

html {
    font-size: 16px;
    font-family: sans-serif;
}

body {
    font-size: 1rem;
    line-height: 1.5rem;

    display: flex;
    align-items: center;
    justify-content: center;
    width: 100vw;
    height: 100vh;
    margin: 0;
}

/* tilemap ----------------------------------- */

svg {
    display: block;
    width: 850px;
    height: 500px;
}

.county-0 { fill: #dddddd; }
.county-1 { fill: #8da0cb; }
.county-2 { fill: #a6d854; }
.county-3 { fill: #e78ac3; }
.county-4 { fill: #e5c494; }
.county-5 { fill: #fc8d62; }
.county-6 { fill: #b3b3b3; }
.county-7 { fill: #ffd92f; }
.county-8 { fill: #66c2a5; }

rect:hover {
    opacity: .5;
}

text {
    pointer-events: none;
}

/* popup ------------------------------------- */

.popup {
    opacity: 0;
    pointer-events: none;

    background-color: #fff;
    box-shadow: 0 4px 10px rgba(0, 0, 0, .25);

    position: absolute;
    top: 0;
    left: 0;
    transition: all .2s ease-out;
}

.popup.active {
    opacity: 1;
}

table {
    border-spacing: none;
    padding: 10px;
}

td {
    padding: 0 5px;
}

td:first-of-type {
    color: #999;
}

td:first-of-type::after {
    content: ':';
}