/* Loading State Critical CSS */
body {
    background-color: #0a1628;
    color: #fff;
    margin: 0;
    opacity: 0;
    transition: opacity 0.5s ease;
}
body.loaded {
    opacity: 1;
}

/* =========================================================================
   MINE Catalog Specific Styles
   ========================================================================= */

/* Section Layout */
.portfolio-section,
.videos-section {
    padding: 6rem 0;
    position: relative;
    background-color: var(--mine-navy);
}

.portfolio-section {
    background-image: radial-gradient(circle at 10% 20%, rgba(34, 211, 238, 0.03) 0%, transparent 50%),
                      radial-gradient(circle at 90% 80%, rgba(167, 139, 250, 0.03) 0%, transparent 50%);
}

.videos-section {
    background-color: var(--mine-navy-light);
    border-top: 1px solid rgba(255, 255, 255, 0.03);
    background-image: radial-gradient(circle at 50% 50%, rgba(214, 175, 55, 0.02) 0%, transparent 60%);
}

/* Filter Bar */
.filter-bar {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 3.5rem;
    padding: 0 1rem;
}

.filter-btn {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    color: var(--gray-300);
    font-family: var(--font-heading);
    padding: 0.65rem 1.6rem;
    border-radius: var(--radius-full);
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    transition: all var(--transition-base);
}

.filter-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(212, 175, 55, 0.3);
    color: #fff;
    transform: translateY(-2px);
}

.filter-btn.active {
    background: var(--gold-gradient);
    border-color: transparent;
    color: var(--mine-navy);
    box-shadow: 0 4px 15px rgba(212, 175, 55, 0.35);
    font-weight: 700;
}

/* Portfolio Grid */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
    transition: opacity 0.2s var(--transition-base), transform 0.2s var(--transition-base);
}

.portfolio-grid.fade-out {
    opacity: 0;
    transform: translateY(15px) scale(0.99);
}

.portfolio-grid.fade-in {
    opacity: 1;
    transform: translateY(0) scale(1);
}

/* Portfolio Cards */
.portfolio-card {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    background: var(--gradient-card);
    border: 1px solid rgba(255, 255, 255, 0.04);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    cursor: pointer;
    aspect-ratio: 4 / 3;
    display: flex;
    flex-direction: column;
    animation: cardEntrance 0.6s cubic-bezier(0.16, 1, 0.3, 1) both;
    animation-delay: var(--stagger-delay, 0s);
}

.portfolio-card:hover {
    transform: translateY(-8px);
    border-color: rgba(212, 175, 55, 0.4);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4), 
                0 0 25px rgba(212, 175, 55, 0.15);
}

.portfolio-img-wrapper {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.portfolio-img-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.portfolio-card:hover .portfolio-img-wrapper img {
    transform: scale(1.06);
}

/* Portfolio Overlay Card */
.portfolio-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, 
                                rgba(10, 22, 40, 0.98) 0%, 
                                rgba(10, 22, 40, 0.8) 55%, 
                                rgba(10, 22, 40, 0.25) 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 1.75rem;
    opacity: 0;
    transition: all var(--transition-base);
    box-sizing: border-box;
}

.portfolio-card:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-badge {
    align-self: flex-start;
    background: rgba(212, 175, 55, 0.15);
    border: 1px solid var(--mine-gold);
    color: var(--mine-gold-light);
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    padding: 0.3rem 0.8rem;
    border-radius: var(--radius-full);
    margin-bottom: 0.8rem;
    letter-spacing: 0.5px;
    font-family: var(--font-heading);
}

.portfolio-card-title {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 700;
    color: #fff;
    margin: 0 0 0.4rem 0;
    line-height: 1.3;
}

.portfolio-card-desc {
    font-size: 0.88rem;
    color: var(--gray-300);
    margin: 0;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

.portfolio-view-icon {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    width: 42px;
    height: 42px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1rem;
    transition: all var(--transition-base);
}

html[dir="rtl"] .portfolio-view-icon {
    right: auto;
    left: 1.5rem;
}

.portfolio-card:hover .portfolio-view-icon {
    background: var(--mine-gold);
    border-color: transparent;
    color: var(--mine-navy);
    transform: scale(1.1);
    box-shadow: 0 0 12px rgba(212, 175, 55, 0.5);
}

/* Empty State */
.empty-portfolio-state {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 5rem 2rem;
    text-align: center;
}

.empty-portfolio-state i {
    font-size: 3rem;
    color: var(--mine-gold);
    margin-bottom: 1.5rem;
    opacity: 0.6;
}

.empty-portfolio-state p {
    font-size: 1.125rem;
    color: var(--gray-400);
    margin: 0;
    font-family: var(--font-heading);
}

/* =========================================================================
   Videos Section Styles
   ========================================================================= */

.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: 2rem;
}

.video-card {
    border-radius: var(--radius-xl);
    overflow: hidden;
    background: var(--gradient-card);
    border: 1px solid rgba(255, 255, 255, 0.04);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.video-card:hover {
    transform: translateY(-8px);
    border-color: rgba(212, 175, 55, 0.4);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4), 
                0 0 25px rgba(212, 175, 55, 0.15);
}

.video-wrapper {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
    height: 0;
    overflow: hidden;
    cursor: pointer;
}

.video-wrapper img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.video-card:hover .video-wrapper img {
    transform: scale(1.03);
}

.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

/* Branded play button integration */
.play-btn-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(10, 22, 40, 0.45);
    transition: background-color var(--transition-base);
}

.video-card:hover .play-btn-overlay {
    background: rgba(10, 22, 40, 0.2);
}

.play-btn-overlay svg {
    width: 70px;
    height: 50px;
    transition: transform var(--transition-bounce), filter var(--transition-base);
    filter: drop-shadow(0 4px 10px rgba(0,0,0,0.4));
}

.play-btn-overlay svg path[fill="red"] {
    fill: var(--mine-navy) !important;
    stroke: var(--mine-gold) !important;
    stroke-width: 1.5px;
    transition: all var(--transition-base);
}

.play-btn-overlay svg path[fill="white"] {
    fill: var(--mine-gold) !important;
    transition: all var(--transition-base);
}

.video-card:hover .play-btn-overlay svg {
    transform: scale(1.12);
    filter: drop-shadow(0 0 15px rgba(212, 175, 55, 0.7));
}

.video-card:hover .play-btn-overlay svg path[fill="red"] {
    fill: var(--mine-gold) !important;
    stroke: transparent !important;
}

.video-card:hover .play-btn-overlay svg path[fill="white"] {
    fill: var(--mine-navy) !important;
}

/* =========================================================================
   Premium Lightbox Slideshow Styles
   ========================================================================= */

.lightbox {
    position: fixed;
    inset: 0;
    background: rgba(5, 10, 20, 0.96);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
    padding: var(--spacing-2xl) var(--spacing-xl);
    backdrop-filter: blur(15px);
    box-sizing: border-box;
}

.lightbox.active {
    opacity: 1;
    visibility: visible;
}

.lightbox-content-wrapper {
    position: relative;
    max-width: 900px;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    border-radius: var(--radius-xl);
    overflow: hidden;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.6), 
                0 0 45px rgba(34, 211, 238, 0.15);
    animation: lightboxEntrance 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

#lightboxImg {
    max-width: 100%;
    max-height: 65vh;
    width: auto;
    height: auto;
    object-fit: contain;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: opacity 0.15s ease, transform 0.15s ease;
}

.lightbox-caption {
    width: 100%;
    padding: var(--spacing-lg) var(--spacing-xl);
    background: rgba(10, 22, 40, 0.95);
    backdrop-filter: blur(10px);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    box-sizing: border-box;
}

#lightboxTitle {
    font-family: var(--font-heading);
    color: #fff;
    font-size: 1.45rem;
    font-weight: 700;
    margin: 0 0 0.5rem 0;
    letter-spacing: 0.5px;
}

#lightboxDesc {
    color: var(--gray-300);
    font-size: 0.95rem;
    margin: 0 0 0.8rem 0;
    line-height: 1.5;
    max-width: 600px;
}

.lightbox-counter {
    color: var(--mine-gold-light);
    font-size: 0.8rem;
    font-weight: 700;
    font-family: var(--font-body);
    background: rgba(212, 175, 55, 0.12);
    border: 1px solid rgba(212, 175, 55, 0.2);
    padding: 0.2rem 0.8rem;
    border-radius: var(--radius-full);
    letter-spacing: 1px;
}

/* Lightbox Actions & Navigation */
.lightbox-close {
    position: absolute;
    top: 2rem;
    right: 2rem;
    font-size: 2.2rem;
    color: rgba(255, 255, 255, 0.6);
    cursor: pointer;
    transition: all var(--transition-base);
    z-index: 2010;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-full);
    line-height: 1;
}

html[dir="rtl"] .lightbox-close {
    right: auto;
    left: 2rem;
}

.lightbox-close:hover {
    color: var(--mine-navy);
    background: var(--gold-gradient);
    border-color: transparent;
    transform: rotate(90deg) scale(1.08);
    box-shadow: 0 0 15px rgba(212, 175, 55, 0.5);
}

.lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 56px;
    height: 56px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.7);
    font-size: 1.25rem;
    cursor: pointer;
    transition: all var(--transition-base);
    z-index: 2010;
}

.lightbox-nav:hover {
    background: var(--gold-gradient);
    border-color: transparent;
    color: var(--mine-navy);
    box-shadow: 0 0 20px rgba(212, 175, 55, 0.6);
    transform: translateY(-50%) scale(1.08);
}

.lightbox-nav.prev {
    left: 2.5rem;
}

.lightbox-nav.next {
    right: 2.5rem;
}

/* =========================================================================
   Animations Keyframes
   ========================================================================= */

@keyframes cardEntrance {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes lightboxEntrance {
    from {
        opacity: 0;
        transform: scale(0.92) translateY(10px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

/* =========================================================================
   Responsive Media Queries
   ========================================================================= */

@media (max-width: 1024px) {
    .lightbox-nav.prev {
        left: 1.5rem;
    }
    .lightbox-nav.next {
        right: 1.5rem;
    }
}

@media (max-width: 768px) {
    .portfolio-section,
    .videos-section {
        padding: 4.5rem 0;
    }
    
    .filter-bar {
        margin-bottom: 2.5rem;
        gap: 0.5rem;
    }
    
    .filter-btn {
        padding: 0.55rem 1.25rem;
        font-size: 0.88rem;
    }
    
    .portfolio-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: 1.5rem;
    }
    
    .video-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .lightbox {
        padding: var(--spacing-xl) var(--spacing-md);
    }
    
    .lightbox-nav {
        top: auto;
        bottom: 1.5rem;
        transform: none;
        width: 48px;
        height: 48px;
        font-size: 1rem;
    }
    
    .lightbox-nav:hover {
        transform: scale(1.05);
    }
    
    .lightbox-nav.prev {
        left: calc(50% - 60px);
    }
    
    .lightbox-nav.next {
        right: calc(50% - 60px);
    }
    
    .lightbox-close {
        top: 1rem;
        right: 1rem;
        width: 40px;
        height: 40px;
        font-size: 1.8rem;
    }
    
    html[dir="rtl"] .lightbox-close {
        left: 1rem;
    }
    
    #lightboxTitle {
        font-size: 1.25rem;
    }
    
    #lightboxDesc {
        font-size: 0.88rem;
    }
}

@media (max-width: 480px) {
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
}