CSS for Firefox addon SuperStart

superstart.css

#sites,
#folder {
    font-family: "Ubuntu Mono",monospace;
}
.site-title-text {
    font-weight:400!important;
}
#folder {
    padding: 1em 0 3em;
}
.site-snapshot {
    background-position: 50% 50%;
    background-size: contain;
    border:none;
}
.site .site-title-text {    
    font-size: 1.4rem;
    font-weight: 700;
    height: 1em;
    left: auto;
    margin: 0 auto;
    overflow: hidden;
    padding: 9px 0;
    position: absolute;
    top: 0;
    right: auto;
    text-align: center;
    text-overflow: ellipsis;
    white-space: nowrap;
    width: 100%;
}
.site.folder .site-title-text {
    background-color: rgba(0, 0, 0, 0.3);
    border-bottom-left-radius: 6px;
    border-bottom-right-radius: 6px;
    top: -32px;
}
.site.in-folder .site-title-text {
    font-size:1.2rem;
    top:5px;
}
.placeholder-snapshot .site-title-text,
.site-title-folder-size {
    display: none;
}
.folder,
.site {
    background-color: transparent;
    border: none!important;
    border-radius: 6px;
}
.site .site-link .site-snapshot {
    background-color: transparent;
}
.site-snapshot.folder-snapshot {
    height: 130px !important;
}
.site-snapshot {
    background-color:transparent;
}
.site-snapshot.folder-snapshot, 
.site-snapshot:not(.placeholder-snapshot) {
    border-radius:6px;    
    border:none;
}
.folder-snapshot {
    background-color: transparent;
}
.site.folder .site-link .site-snapshot {
    background-color: rgba(0, 0, 0, 0.3);
}
.site.folder {
    background-color: rgba(0, 0, 0, 0.15);
}
.image-preview {
    border:none;
}