#aviso-compatibilidade {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: #ffcc00;
    color: #000;
    text-align: center;
    padding: 10px;
    font-size: 16px;
    z-index: 9999;
    display: none;
}
#aviso-compatibilidade button {
    margin-left: 10px;
    padding: 5px 10px;
    background: #000;
    color: #fff;
    border: none;
    cursor: pointer;
}