.flex_wrap {margin-left: auto; margin-right: auto; margin-top: 10px; margin-bottom: 15px;}
.flex {
    display: flex;
    flex-flow: wrap;
    margin-left: auto;
    margin-right: auto;
    padding: 10px;
    justify-content: center; 
    border: 3px solid;
    border-radius: 3px;
    border-color: #fff;
    -moz-box-shadow: 0 0 7px #33;
    -webkit-box-shadow: 0 0 7px #333;
    box-shadow: 0 0 7px #333;      
    color: #f5f5f5;
    background-color: #090909;
    font-family: courier, monospace;
}

.flex_testimonial {
    width: 350px;
    min-height: 400px;        
    margin: 15px;
    border-collapse: collapse;
    border: 1px solid;
    border-radius: 0px;
    border-color: #090909;
    -moz-box-shadow: 0 0 4px #b2b2b2;
    -webkit-box-shadow: 0 0 4px #b2b2b2;
    box-shadow: 0 0 4px #b2b2b2;
    background-color: #fff;
}

.flex_row {
    display: table-row;
    text-align: left;
 }

.flex_cell_client {
    display: table-cell;
    padding-left: 35px;
    padding-bottom: 35px;
    font-size: 1em;
    font-weight: 600;
    line-height: 1.5em;
    letter-spacing: 0em;
    background-color: #fff;
    font-family: verdana, sans-serif; 
    color: #090909;
}

.flex_cell_testimonial {
    display: table-cell;
    padding: 25px;
    text-align: left;
    line-height: 2em;    
    font-family: courier, monospace;
    font-size: .95em;
    color: #090909;      
}

mark {background: #ffff99!important; padding: 3px;} 

@media all and (min-width: 360px) and (max-width: 480px) { 
    .flex_testimonial {width: 300px;}
    .flex_cell_client {font-size: .85em}
    .flex_cell_testimonial {font-size: .75em;}   
}