.error_sem {   padding:2px 10px 2px 10px; display: none; color:#C03; font-size:12px;}

.success_sem { display: none; padding:2px 10px 2px 10px; color:#FF6A00;  font-size:14px;}

.whatsapp{
    position: fixed;
    right: 15px;
    bottom: 60px;
    z-index: 99999;    
}

.whatsapp a{
    font-size: 28px;
    color: white;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    text-align: center;
    line-height: 60px;
    display: block;
    background-color: #00e675;
    box-shadow: 0 3px 12px #00000040;
    transition: 0.3s;
}

.whatsapp a:hover{
    background-color: #118c7e;
}