.iso-forum-backtop {
    position: fixed;
    right: 24px;
    bottom: 162px;
    z-index: 1090;
    display: grid;
    place-items: center;
    width: 48px;
    height: 48px;
    padding: 0;
    color: #f8fafc;
    background: linear-gradient(145deg, #5368ee, #7658e8);
    border: 1px solid rgba(255, 255, 255, .28);
    border-radius: 16px;
    box-shadow: 0 12px 30px rgba(16, 34, 69, .4);
    font: 700 24px/1 system-ui, sans-serif;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px) scale(.94);
    transition: opacity .2s ease, visibility .2s ease, transform .2s ease, box-shadow .2s ease;
}
.iso-forum-backtop.is-visible {
    opacity: 1;
    visibility: visible;
    transform: none;
}
.iso-forum-backtop:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 34px rgba(32, 49, 112, .52);
}
.iso-forum-backtop:focus-visible {outline: 3px solid #8fb8ff;outline-offset: 3px}
@media (max-width:720px) {
    .iso-forum-backtop {right:12px;bottom:82px;width:44px;height:44px;border-radius:14px;font-size:22px}
}
@media (prefers-reduced-motion:reduce) {.iso-forum-backtop{transition:none}}