テンプレート:Spoiler/styles.css

.spoiler {
    background:#555;    
    transition:all 0.2s;
}
div.spoiler {
    display:table;
}
.spoiler span {
    user-select:none;
    opacity:0;
    transition:all 0.2s;
}
.spoiler.off, 
.spoiler.showall,
.spoiler.hover:hover {
    background:unset !important;
    filter:none !important;
}
.spoiler.off span, 
.spoiler.showall span,
.spoiler.hover:hover span {
    user-select:unset;
    opacity:1;
}