.goingup-btn {
    position: fixed;
    bottom: 40px;
    z-index: 9999;
    width: 48px;
    height: 48px;
    border: none;
    border-radius: 50%;
    font-size: 18px;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.goingup-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.4);
}

.goingup-btn:focus {
    outline: 2px solid rgba(255, 255, 255, 0.6);
    outline-offset: 2px;
}

.goingup-btn.goingup-visible {
    opacity: 1;
    visibility: visible;
}

.goingup-bottom-right {
    right: 40px;
}

.goingup-bottom-left {
    left: 40px;
}