:root {
    --primary-color: #da1010;
    --secondary-color: #2c3e50;
    --light-color: #212761;
    --dark-color: #eea509;
    --gap: 15px;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--light-color);
    color: var(--secondary-color);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--gap);
}

.gallery-header {
    text-align: center;
    padding: 40px 20px;
    background-color: rgb(236, 112, 10);
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.gallery-header h1 {
    margin: 0;
    color: var(--secondary-color);
    font-weight: 600;
}

/* Estilos de los Filtros */
.filter-container {
    text-align: center;
    margin-bottom: 40px;
}

.filter-btn {
    border: none;
    background-color: #fff;
    padding: 12px 24px;
    margin: 5px;
    cursor: pointer;
    border-radius: 5px;
    transition: background-color 0.3s, color 0.3s;
    font-size: 16px;
    font-weight: 500;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    text-transform: capitalize;
}

.filter-btn:hover {
    background-color: var(--primary-color);
    color: white;
}

.filter-btn.active {
    background-color: var(--primary-color);
    color: white;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

/* Estilos de la Galería */
.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--gap);
}

.gallery-item {
    overflow: hidden;
    cursor: pointer;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(212, 35, 35, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    height: 250px;
    position: relative;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.gallery-item:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 16px rgba(0,0,0,0.2);
}

.gallery-item.hide {
    display: none;
}

.gallery-item.show {
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}

/* Estilos del Lightbox */
.lightbox-modal {
    display: none;
    position: fixed;
    z-index: 1000;
    padding-top: 60px;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.9);
    animation: fadeIn 0.5s;
}

.lightbox-content {
    margin: auto;
    display: block;
    max-width: 80%;
    max-height: 80vh;
    animation: zoomIn 0.5s;
}

@keyframes zoomIn {
    from {transform: scale(0.5);}
    to {transform: scale(1);}
}

.close-btn, .prev-btn, .next-btn {
    position: absolute;
    color: white;
    font-size: 40px;
    font-weight: bold;
    transition: 0.3s;
    cursor: pointer;
    user-select: none;
    z-index: 1001;
}

.close-btn {
    top: 15px;
    right: 35px;
}

.prev-btn, .next-btn {
    top: 50%;
    transform: translateY(-50%);
    padding: 16px;
}

.prev-btn {
    left: 10px;
}

.next-btn {
    right: 10px;
}

.close-btn:hover, .prev-btn:hover, .next-btn:hover {
    color: var(--primary-color);
}


/* Diseño Responsivo */
@media (max-width: 768px) {
    .gallery {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
    .filter-btn {
        padding: 10px 18px;
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    .gallery {
        grid-template-columns: 1fr;
    }
    .filter-container {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
    }
    .filter-btn {
        flex-grow: 1;
        margin: 4px;
    }
    .lightbox-content {
        max-width: 95%;
    }
}