.backroundImageSlider{
    min-height: 81vh;
    width: 100%;
    background-image: linear-gradient(rgba(4, 9, 30, 0.7), rgba(4, 9, 30, 0.7)), url(slide-1.jpg);
    background-position: center;
    background-size:cover;
    position: relative;
    margin-top: 10px;
    animation: slide 16s ease-in-out infinite;
    transition: background-size 0.5s ease;
}

@keyframes slide{
    0%{
        background-image: linear-gradient(rgba(4, 9, 30, 0.7), rgba(4, 9, 30, 0.7)), url(slide-1.jpg);
    }
    25%{
        background-image: linear-gradient(rgba(4, 9, 30, 0.7), rgba(4, 9, 30, 0.7)), url(slide-2.jpg);
    }
    50%{
        background-image: linear-gradient(rgba(4, 9, 30, 0.7), rgba(4, 9, 30, 0.7)), url(slide-3.jpg);
    }
   75%{
    background-image: linear-gradient(rgba(4, 9, 30, 0.7), rgba(4, 9, 30, 0.7)), url(slide-4.jpg);
    }
    100%{
        background-image: linear-gradient(rgba(4, 9, 30, 0.7), rgba(4, 9, 30, 0.7)), url(slide-5.jpg);
    }
}

.mesajPrincipal{
    width: 90%;
    color:#fff;
    position: absolute;
    top:50%;
    left:50%;
    transform: translate(-50%,-50%);
    text-align: center;
}

.mesajPrincipal h1{
    font-size: 32px;
    color:#fff;
}

.mesajPrincipal p{
    margin:10px 0 40px;
    font-size: 17px;
    color:#fff;
}

.mesajPrincipal p span{
    color:orange;
}

@media(max-width:700px){

.mesajPrincipal{
    width: 95%;
}

.mesajPrincipal h1 {
        font-size: 25px;
}

.mesajPrincipal p{
    font-size: 12px;
}
.backroundImageSlider{
    min-height: 84vh;
}
}