.modal_back_aviso {
    position: fixed;
    z-index: 99999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: rgba(0, 0, 0, 0.4);
    transition: 0.5s;
    
    display: flex;
    justify-content: center;
    align-items: center;
}

.content_aviso {
    min-width: 300px;
    max-width: 400px;

    width: auto;
    height: auto;

    padding: 10px;

    background-color: white;
    display: block;
}

    .content_aviso .header_aviso {
        width: 100%;
        height: 20px;

        display: block;
    }

        .content_aviso .header_aviso label {
            font-size: 15px;
        }

        .content_aviso .header_aviso a {
            cursor: pointer;
            display: block;

            float: right;
        }

    .content_aviso .body_aviso {
        width: 100%;
        height: auto;
        display: block;
        word-break: break-word;
    }

    .content_aviso .buttons_aviso {
        width: 100%;
        height: 45px;

        text-align: right;

        display: block;
    }

        .content_aviso .buttons_aviso a {
            width: auto;
            height: 35px;
            cursor: pointer;
            background-color: dodgerblue;
            color: white;
            line-height: 35px;
            text-align: center;

            border-radius: 1px;
            padding: 0px 10px;
            margin: 10px;
            margin-right: 0px;

            display: inline-block;
        }