.ib-scroll-top-fab {
    position: fixed;
    left: auto;
    right: 12px;
    bottom: calc(16px + env(safe-area-inset-bottom, 0px));
    z-index: 1035;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 0;
    min-width: 0;
    height: 52px;
    padding: 0;
    margin: 0;
    border: 0;
    border-radius: 50%;
    overflow: hidden;
    appearance: none;
    -webkit-appearance: none;
    background: linear-gradient(180deg, #4b8fb8 0%, #368daf 100%);
    color: #fff;
    box-shadow: 0 6px 18px rgba(54, 141, 175, 0.4);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(8px) scale(0.92);
    transition: opacity 0.22s ease, visibility 0.22s ease, transform 0.22s ease, width 0.22s ease, box-shadow 0.22s ease;
}

.ib-scroll-top-fab.is-visible {
    width: 52px;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0) scale(1);
}

.ib-scroll-top-fab:hover,
.ib-scroll-top-fab:focus-visible {
    color: #fff;
    box-shadow: 0 8px 22px rgba(54, 141, 175, 0.5);
    outline: none;
}

.ib-scroll-top-fab i {
    font-size: 22px;
    line-height: 1;
}

body.has-mobile-bottom-bar .ib-scroll-top-fab {
    bottom: calc(78px + env(safe-area-inset-bottom, 0px));
}

@media (min-width: 992px) {
    .ib-scroll-top-fab {
        right: 20px;
        bottom: 24px;
        width: 48px;
        height: 48px;
    }

    .ib-scroll-top-fab.is-visible {
        width: 48px;
    }

    .ib-scroll-top-fab i {
        font-size: 20px;
    }

    body.has-mobile-bottom-bar .ib-scroll-top-fab {
        bottom: 24px;
    }
}