#scrollToTopBtn {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 48px;
    height: 48px;
    background-color: rgba(91 192 222);
    color: #fff;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 999;
    transition: opacity 0.3s ease, transform 0.3s ease;
    backdrop-filter: blur(6px);
}

#scrollToTopBtn svg {
    stroke: #232323;
}

#scrollToTopBtn:hover {
    background-color: rgba(91 192 222);
    transform: scale(1.2);
}
#scrollToTopBtn:hover svg {
    stroke: #fff;
}

/* Плавне зникнення/поява */
#scrollToTopBtn.show {
    display: flex;
    opacity: 1;
}