body{
    box-sizing:border-box;
    margin:0;
    padding:0;
}

.fleche img{
    transition-duration: 4s;
    transition-delay: 2s;
}

.fleche img:hover{
     transform: rotate(90deg);
     transition-duration: 4s;
    transition-delay: 2s;
}

.projet{
   border:solid #DD5735 5px;
    border-radius: 50% /50%;
    margin:10px;
    position:absolute;
}

.projet img{
    transition-duration: 1s;
    transition-delay: 1s;
    
}

.projet img:hover{
    transform:scale(0.5)
}
.titre{
    color:#DD5735;
    position:absolute;
    margin-top:200px;
    margin-left:120px;
    font-weight:bold;
    opacity:0;
}

.titre:hover{
    opacity:100%;
    transition-delay:2s;
}