body {
    background-color: #f5f6fa;
}

.upload-zone {
    border: 2px dashed #dee2e6;
    border-radius: 0.5rem;
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.3s, background-color 0.3s;
}

.upload-zone:hover {
    border-color: #0d6efd;
}

.upload-zone.drag-over {
    border-color: #0d6efd;
    background-color: #e8f0fe;
}

.screenshot-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 1rem;
}

.screenshot-card img {
    width: 100%;
    height: auto;
    border-radius: 0.375rem 0.375rem 0 0;
    transition: transform 0.2s;
}

.screenshot-card:hover img {
    transform: scale(1.01);
}

.table th {
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: #6c757d;
}