/**
 * Portfolio Gallery - Masonry Responsive Grid
 * v2.11.0 - Grid Responsive con Lazy Loading
 */

/* ============================================
   MASONRY GRID LAYOUT (Column-based approach)
   ============================================ */

.portfolio-masonry-grid {
    column-count: 3;
    column-gap: 1.5rem;
    padding: 0;
    margin: 0;
}

.portfolio-masonry-item {
    break-inside: avoid;
    page-break-inside: avoid;
    margin-bottom: 1.5rem;
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.portfolio-masonry-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.portfolio-masonry-item img {
    width: 100%;
    height: auto;
    display: block;
    cursor: pointer;
    background: #f0f0f0; /* Placeholder mientras carga */
}

/* Lazy loading - imagen antes de cargar */
.portfolio-masonry-item img[data-src] {
    filter: blur(5px);
    opacity: 0.6;
    transition: filter 0.3s ease, opacity 0.3s ease;
}

/* Lazy loading - imagen cargada */
.portfolio-masonry-item img.loaded {
    filter: blur(0);
    opacity: 1;
}

.portfolio-masonry-caption {
    padding: 1rem;
    color: #666;
    font-size: 0.9rem;
    margin: 0;
}

/* ============================================
   RESPONSIVE BREAKPOINTS
   ============================================ */

/* Tablets - 2 columnas */
@media (max-width: 1024px) {
    .portfolio-masonry-grid {
        column-count: 2;
        column-gap: 1.25rem;
    }

    .portfolio-masonry-item {
        margin-bottom: 1.25rem;
    }
}

/* Mobile - 1 columna */
@media (max-width: 640px) {
    .portfolio-masonry-grid {
        column-count: 1;
        column-gap: 0;
    }

    .portfolio-masonry-item {
        margin-bottom: 1rem;
    }
}

/* ============================================
   BEFORE/AFTER SECTION - Mejoras responsive
   ============================================ */

.before-after-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

@media (max-width: 768px) {
    .before-after-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
}

/* ============================================
   LOADING SPINNER (opcional para lazy loading)
   ============================================ */

.portfolio-loading {
    display: inline-block;
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #003366;
    border-radius: 50%;
    animation: portfolio-spin 1s linear infinite;
    margin: 2rem auto;
}

@keyframes portfolio-spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ============================================
   LIGHTBOX IMPROVEMENTS (ya existe pero mejoramos)
   ============================================ */

#lightbox-dialog {
    border: none;
    background: rgba(0, 0, 0, 0.95);
    max-width: 100vw;
    max-height: 100vh;
    padding: 0;
    color: white;
}

#lightbox-dialog::backdrop {
    background: rgba(0, 0, 0, 0.9);
}

.lightbox-content {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 80vh;
    padding: 2rem;
}

#lightbox-img {
    max-width: 90vw;
    max-height: 75vh;
    object-fit: contain;
    border-radius: 8px;
}

.lightbox-caption {
    color: #f0f0f0;
    margin-top: 1rem;
    text-align: center;
    font-size: 1rem;
    max-width: 600px;
}

.lightbox-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: none;
    font-size: 2rem;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    transition: background 0.3s ease;
    z-index: 10;
}

.lightbox-close:hover {
    background: rgba(255, 255, 255, 0.3);
}

.lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: none;
    font-size: 3rem;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    cursor: pointer;
    transition: background 0.3s ease;
    z-index: 10;
}

.lightbox-nav:hover {
    background: rgba(255, 255, 255, 0.3);
}

.lightbox-nav--prev {
    left: 1rem;
}

.lightbox-nav--next {
    right: 1rem;
}

@media (max-width: 768px) {
    .lightbox-nav {
        width: 45px;
        height: 45px;
        font-size: 2rem;
    }

    #lightbox-img {
        max-width: 95vw;
        max-height: 70vh;
    }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.portfolio-section {
    margin-bottom: 3rem;
}

.portfolio-heading {
    color: #003366;
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
    font-weight: 700;
}

.portfolio-subtext {
    color: #666;
    margin-bottom: 2rem;
    font-size: 1.05rem;
}