body {
    margin:0;
    font-family:Arial;
    background:#111;
    color:#fff;
}

.contenedor {
    max-width:1200px;
    margin:auto;
    padding:30px;
}

h1 {
    text-align:center;
    margin-bottom:30px;
}

.grid-galerias,
.grid-imagenes {
    display:grid;
    grid-template-columns: repeat(auto-fit,minmax(250px,1fr));
    gap:20px;
}

.tarjeta {
    background:#222;
    border-radius:10px;
    overflow:hidden;
    text-decoration:none;
    color:white;
    transition:0.3s;
}

.tarjeta:hover {
    transform:scale(1.03);
}

.tarjeta img {
    width:100%;
    height:220px;
    object-fit:cover;
}

.tarjeta span {
    display:block;
    padding:10px;
    text-align:center;
    background:#000;
}

.grid-imagenes img {
    width:100%;
    height:250px;
    object-fit:cover;
    border-radius:10px;
    cursor:pointer;
    transition:0.3s;
}

.grid-imagenes img:hover {
    transform:scale(1.03);
}

.volver {
    display:inline-block;
    margin-bottom:20px;
    color:white;
    text-decoration:none;
}

/* MODAL */

#modal {
    position:fixed;
    top:0; left:0; right:0; bottom:0;
    background:rgba(0,0,0,0.9);
    display:none;
    justify-content:center;
    align-items:center;
    z-index:999;
}

#modal img {
    width:90%;
    max-width:900px;
    max-height:90vh;
    object-fit:contain;
}