.advertisement {
    position: fixed;
    width: 200px;
    height: 500px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    transition: transform 0.2s ease;
    top: 50%;
    transform: translateY(-50%);
    z-index: 100;
}

.advertisement:first-of-type {
    left: 20px;
}

.advertisement:last-of-type {
    right: 20px;
}

.advertisement:hover {
    transform: translateY(-50%) scale(1.02);
}

.advertisement img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}