/* Image Viewer - Full Screen Gallery (Premium Style) */
#image-viewer-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(15, 23, 42, 0.95);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    z-index: 100000;
    /* Highest priority */
    display: none;
    /* Hidden by default */
    opacity: 0;
    transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    /* Flex to center everything */
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

#image-viewer-overlay.active {
    opacity: 1;
}

/* Image Container */
.iv-image-container {
    position: relative;
    width: 100%;
    height: 80%;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.iv-current-image {
    max-width: 90%;
    max-height: 90%;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    transform: scale(0.95);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

#image-viewer-overlay.active .iv-current-image {
    transform: scale(1);
}

/* Controls (Prev/Next) */
.iv-nav-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    -webkit-backdrop-filter: blur(4px);
    backdrop-filter: blur(4px);
    transition: all 0.2s ease;
    z-index: 10;
    outline: none;
}

.iv-nav-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-50%) scale(1.1);
}

.iv-nav-btn.prev {
    left: 30px;
}

.iv-nav-btn.next {
    right: 30px;
}

/* Header Actions */
.iv-header {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    padding: 24px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 20;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.6), transparent);
}

.iv-counter {
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.5px;
    background: rgba(0, 0, 0, 0.3);
    padding: 6px 14px;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.iv-close-btn {
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
    -webkit-backdrop-filter: blur(4px);
    backdrop-filter: blur(4px);
}

.iv-close-btn:hover {
    background: rgba(239, 68, 68, 0.8);
    transform: rotate(90deg);
}

/* Thumbnails Strip */
.iv-thumbnails-track {
    position: absolute;
    bottom: 30px;
    display: flex;
    gap: 10px;
    padding: 10px 20px;
    background: rgba(0, 0, 0, 0.4);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    max-width: 80vw;
    overflow-x: auto;
    z-index: 20;
}

.iv-thumb {
    width: 60px;
    height: 60px;
    border-radius: 8px;
    overflow: hidden;
    opacity: 0.5;
    cursor: pointer;
    transition: all 0.2s;
    border: 2px solid transparent;
    flex-shrink: 0;
}

.iv-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.iv-thumb:hover {
    opacity: 0.8;
    transform: translateY(-2px);
}

.iv-thumb.active {
    opacity: 1;
    border-color: #3b82f6;
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* Mobile Adjustments */
@media (max-width: 768px) {
    .iv-nav-btn {
        display: none;
    }

    /* Use swipe on mobile */
    .iv-thumbnails-track {
        bottom: 20px;
        padding: 6px;
    }

    .iv-thumb {
        width: 48px;
        height: 48px;
    }
}