style.css

@import url('https://fonts.googleapis.com/css2?family=Bangers&display=swap');
html {
    box-sizing: border-box;
}
body {
    margin: 0;
    background-color: whitesmoke;
    font-family: 'Bangers' , sans-serif;
}
h1 {text-align: center;font-size: 3em;letter-spacing: 8px;}
.loader {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255,255,255,0.8);
}
/*
    here i made it position fixed to cover all the page and over the hight
    like i'm stretching a paper on a table to paint it
*/
/*
    here i made it fixed to bc i want it to be fixed and to give it dimentions (top , left)
    and the transform => translate to make the top & left 50% without counting element's width and height

*/
.loader img{
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}
.imgs-container {
    margin: 10px 25%;
}
.imgs-container img{
    margin-top: 5px;
    width: 100%;
}
/*
    // Media Query
*/
@media screen and (max-width: 600px){
    .imgs-container {
        margin: 10px 5%;
    }
}