/* --- Media Gallery Grid --- */
.media-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.media-item {
    border-radius: var(--radius);
    border: 1px solid var(--border);
    overflow: hidden;
    background: var(--bg-white);
    transition: box-shadow var(--transition);
    cursor: pointer;
    position: relative;
}
.media-item:hover {
    box-shadow: var(--shadow-md);
}
.media-item.selected {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px var(--primary);
}

.media-item-thumb {
    width: 100%;
    aspect-ratio: 16/9;
    background: var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}
.media-item-thumb img,
.media-item-thumb video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.media-item-thumb .play-icon {
    position: absolute;
    width: 40px;
    height: 40px;
    background: rgba(0,0,0,0.6);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1rem;
}

.media-item-info {
    padding: 10px 12px;
}
.media-item-name {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.media-item-meta {
    font-size: 0.6875rem;
    color: var(--text-muted);
    margin-top: 2px;
}

.media-item-bots {
    font-size: 0.65rem;
    color: var(--primary);
    margin-top: 2px;
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.media-item-actions {
    position: absolute;
    top: 8px;
    right: 8px;
    display: flex;
    gap: 4px;
    opacity: 0;
    transition: opacity var(--transition);
}
.media-item:hover .media-item-actions {
    opacity: 1;
}
.media-item-actions button {
    width: 28px;
    height: 28px;
    background: rgba(0,0,0,0.6);
    border-radius: var(--radius-sm);
    color: #fff;
    font-size: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
}
.media-item-actions button:hover {
    background: rgba(0,0,0,0.8);
}

/* --- File Upload --- */
.upload-area {
    border: 2px dashed var(--border);
    border-radius: var(--radius-lg);
    padding: 40px;
    text-align: center;
    transition: all var(--transition);
    cursor: pointer;
}
.upload-area:hover,
.upload-area.dragover {
    border-color: var(--primary);
    background: var(--primary-light);
}
.upload-area-icon {
    font-size: 2.5rem;
    margin-bottom: 12px;
    opacity: 0.4;
}
.upload-area h4 {
    font-size: 0.9375rem;
    margin-bottom: 4px;
}
.upload-area p {
    font-size: 0.8125rem;
}

.upload-progress {
    margin-top: 16px;
}
.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--border-light);
    border-radius: var(--radius-full);
    overflow: hidden;
}
.progress-bar-fill {
    height: 100%;
    background: var(--primary);
    border-radius: var(--radius-full);
    transition: width 0.3s ease;
}

/* --- Lightbox --- */
.lightbox-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.9);
    z-index: 1100;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
}
.lightbox-content {
    max-width: 90vw;
    max-height: 80vh;
}
.lightbox-content img,
.lightbox-content video {
    max-width: 100%;
    max-height: 80vh;
    border-radius: var(--radius);
}
.lightbox-close {
    position: absolute;
    top: 20px;
    right: 20px;
    color: #fff;
    font-size: 2rem;
    cursor: pointer;
    opacity: 0.7;
}
.lightbox-close:hover {
    opacity: 1;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .media-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .media-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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