body{
    margin:0;
    font-family: Arial, Helvetica, sans-serif;
    background:#f4f4f4;
}

header{
    background:#222;
    color:white;
    text-align:center;
    padding:20px;
    font-size:28px;
    letter-spacing:1px;
}

.gallery{
    display:grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap:15px;
    padding:20px;
    max-width:1200px;
    margin:auto;
}

.gallery img{
    width:100%;
    height:250px;
    object-fit:cover;
    border-radius:10px;
    cursor:pointer;
    transition: transform .3s, box-shadow .3s;
}

.gallery img:hover{
    transform:scale(1.05);
    box-shadow:0 8px 20px rgba(0,0,0,.2);
}

.lightbox{
    position:fixed;
    top:0;
    left:0;
    width:100%;
    height:100%;
    background:rgba(0,0,0,.9);
    display:none;
    justify-content:center;
    align-items:center;
    z-index:1000;
}

.lightbox img{
    max-width:90%;
    max-height:90%;
    border-radius:10px;
}

.close{
    position:absolute;
    top:20px;
    right:30px;
    color:white;
    font-size:40px;
    cursor:pointer;
}

footer{
    text-align:center;
    padding:15px;
    background:#222;
    color:white;
}