.pre-content {
  display: flex;
  height: 100vh;
  justify-content: center;
  align-items: center;
  background: #fff;
  z-index:99999999;
  
}

.pre-logo { 
width:60%;
  
}

.pre-logo2 { 

  text-align: center;
  display: table-cell;
  vertical-align: middle;
  animation-duration: 4s;
   animation-name: clignoter;
   animation-iteration-count: infinite;
   transition: none;
}


.loading {
    margin: auto;
    text-align: center;
    margin-top: 3vw;
    font-size: 2vw;
}


@keyframes clignoter {
  0%   { opacity:1; }
  40%   {opacity:0; }
  100% { opacity:1; }
}