body {
    background: #111;
    color: #fff;
    font-family: Arial, sans-serif;
    text-align: center;
}

/* CONTENEDOR DE GALERÍA */
.gallery {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

/* MINIATURAS */
.gallery img {
    width: 200px;
    height: 260px;
    object-fit: cover;
    cursor: pointer;
    border-radius: 6px;
    transition: transform 0.2s;
}

.gallery img:hover {
    transform: scale(1.05);
}

/* LIGHTBOX (FONDO OSCURO) */
#lightbox {
    display: none;
    position: fixed;
    z-index: 999;
    padding-top: 40px;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    
    background-color: rgba(0,0,0,0.9);
}

/* IMAGEN GRANDE */
#lightbox img {
    margin: auto;
    display: block;
    max-width: 90%;
    max-height: 90%;
    border-radius: 8px;
}

/* BOTÓN CERRAR */
#lightbox span {
    position: absolute;
    top: 20px;
    right: 35px;
    color: white;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
}

/* thumbnails */
.gallery img{
    width: 100%;
    max-width: 250px;
    height: 200px;
    object-fit: cover;
    cursor: pointer;
    border-radius: 8px;
}

.upload-btn{
    display: flex;
    align-items: center;
    justify-content: center;

    width: 95%;
    max-width: 500px;
    height: 100px;

    margin: 30px auto;

    font-size: 26px;
    font-weight: bold;

    background: #222;
    color: white;

    border-radius: 16px;

    cursor: pointer;

    box-shadow: 0 6px 15px rgba(0,0,0,0.4);

    transition: all 0.15s ease;

    user-select: none;
}


.upload-btn:active{
    transform: scale(0.96);
    background: #000;
}