body{
    background: white;
    font-family: Arial, Helvetica, sans-serif;
    color: rgb(255, 255, 255);
    text-align: center;
    
}



.box{
    padding: 20px 50px;
    background: #0e5dad44;
    margin: 20px;
    margin-left: 230px;
    text-align: center;
    color: #ffffaa;
    border-top: 1px solid;
    font-family: sans-serif;
    font-weight: bold;
    font-size: 30px; 
}


.card{
 background: #6ac;
text-align: center;
width: 395px;
margin: auto;
margin-top: 10px;
padding: 20px 10px;
box-shadow: 0px 0px 35px rgba(8, 8, 8, 0.4) ;
border-radius: 8px;
display: inline-block;
margin: 80px;
}

.red_card{
    background:#f86 ;
}

.green_card{

    background: #5b7;
}
.card_title{
    font-size: 22px;
    margin: 0;
}

.card_subtitle{
    font-size: 20px;
    font-weight: 100;
    letter-spacing: 2px;
    margin: 0;
    margin-top: 5px;
}
<!--aqui va el contenido-->
.card_content{
    font-size: 20px;
    padding: 10px 20px;
    padding-bottom: 0;
    text-align: justify;
    margin-bottom: 0;
}

.card_img{ 
width: 300px;
}