#custom-banner {
    position: fixed;
    left: 20px;
    bottom: 20px;
    width: 300px;
    display: none;
    z-index: 1000;
}

#custom-banner img {
    opacity: 0.9;
}

#close-banner {
    position: absolute;
    right: -10px;
    top: -10px;
    background: none;
    border: 2px solid black;
    font-size: 30px;
    color: black;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: white;
    cursor: pointer;
}

@media (max-width: 768px) {
    #custom-banner {
        left: 20px;
        bottom: 20px;
        width: 130px;
    }

    #close-banner {
        width: 8px;
        height: 30px;
        font-size: 15px;
        right: -15px;
        top: -15px;
    }
}

@media (min-width: 769px) {
    #close-banner {
        top: -16px;
    }
}