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

body{

    background-image:url("certificates/gifgit.gif");
    background-size:cover;
    background-position:center;
    background-repeat:no-repeat;
    background-attachment:fixed;

    padding:30px;
}

/* الجاليري */

.gallery{

    width:100%;
    max-width:1500px;

    margin:0 auto 1000px auto;

    display:grid;

    grid-template-columns:repeat(3, 450px);

    justify-content:center;

    gap:25px;
}

/* الصور */

.gallery img{

    width:450px;
    height:320px;

    object-fit:cover;

    display:block;

    border-radius:12px;

    box-shadow:0 8px 20px rgba(0,0,0,.45);

    transition:0.35s;
}

/* Hover */

.gallery img:hover{

    transform:scale(1.05);

    box-shadow:0 15px 35px rgba(0,0,0,.7);

    cursor:pointer;
}

/* Responsive */

@media(max-width:1450px){

.gallery{

grid-template-columns:repeat(2,450px);

}

}

@media(max-width:950px){

.gallery{

grid-template-columns:1fr;

}

.gallery img{

width:100%;
height:auto;

}

}