qgis2web.css

html, body {
    height: 100%;
    padding: 0;
    margin: 0;
    font-family: sans-serif;
    font-size: small;
}

th, td {
    vertical-align: top;
    text-align: left;
}

#map {
    width: 100%;
    height: 100%;
}

.ol-popup {
    display: none;
    position: absolute;
    background-color: white;
    -moz-box-shadow: 0 1px 4px rgba(0,0,0,0.2);
    -webkit-filter: drop-shadow(0 1px 4px rgba(0,0,0,0.2));
    filter: drop-shadow(0 1px 4px rgba(0,0,0,0.2));
    padding: 15px;
    border-radius: 10px;
    border: 1px solid #cccccc;
    bottom: 12px;
    left: -50px;   
    height: auto;
    width: auto;
    min-width: 100px;
    max-height:400px;  
    overflow: auto;      
}

.ol-popup-closer {
    text-decoration: none;
    position: absolute;
    top: 2px;
    right: 8px;
}

.ol-popup-closer:after {
    content: "X";
}

.ol-attribution a {
    text-decoration: none;
    color: #666;
    font-family: sans-serif;
    font-size: 100%;
}

#popup-content>ul>li:nth-child(even) {
    background-color: #eee;
}

#popup-content ul {
    list-style-type: none;
    padding-left: 0;
}

#popup-content li {
    margin-bottom:0.25em;
}