DursunCan You can add this to your CSS. Or, I went ahead and updated this one BBCode. So, you can do composer update zerosonesfun/blur
.
/* Blurred spoiler in dark mode */
.dark .bbspoiler-blur {
text-shadow: 0 0 12px rgba(255,255,255,1.0), 0 0 12px rgba(255,255,255,1.0);
transition: all 2s ease-in-out;
padding-left: 5px;
}
.dark .bbspoiler-blur:hover {
text-shadow: none;
color: #fff;
cursor: help;
padding-left: 0;
}