.title-aaa {
    position : relative;
    text-align: center;
}
.btn-am{
    background: #222222 !important;
    color: yellow;
    border: 1px solid #000;
    border-radius: 5px;
    width: 100% !important;
    display: block;
}

.btn-am button{
    width: 100% !important;
    display: block;
    background: none !important;
    font-size: 20px;
    border: none;
}
.btn-am:active{
    color: yellow;
}
.btn-am:visited{
    color: yellow;
}
.btn-am:hover{
    color: yellow;
    background: #000 !important;
}
.container_alerta {
        font-family: Arial, sans-serif;
        margin: 20px auto;
        max-width: 600px;
        background-color: #f9f9f9;
        padding: 30px;
        border-radius: 8px;
    }

    .label_alerta {
        display: block;
        margin-top: 10px;
    }

    .input_alerta, .textarea_alerta, .select_alerta {
        width: 100%;
        padding: 8px;
        margin-top: 5px;
        border: 1px solid #ccc;
        border-radius: 4px;
    }

    .btn_alerta {
        margin-top: 15px;
        padding: 10px 15px;
        background-color: #4CAF50;
        color: white;
        border: none;
        border-radius: 4px;
        cursor: pointer;
    }

    .btn_alerta:hover {
        background-color: #45a049;
    }

    .mensaje {
        color: green;
    }
    
    .img-thumbnail{
        width: auto !important;
        height: 40% !important;
    }
    
    .title-aaa{
        font-size: 3rem;
        font-weight: bold;
    }