:root {
    --primary-color: #4e73df;
    --secondary-color: #f8f9fc;
    --text-color: #333;
    --bg-color: #fff;
    --card-bg: #fff;
    --border-color: #e3e6f0;
}

[data-bs-theme="dark"] {
    --primary-color: #4e73df;
    --secondary-color: #2c2c2c;
    --text-color: #f8f9fa;
    --bg-color: #1a1a1a;
    --card-bg: #2c2c2c;
    --border-color: #444;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease;
}

.card {
    background-color: var(--card-bg);
    border-color: var(--border-color);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.drop-zone {
    border: 2px dashed var(--border-color);
    background-color: var(--secondary-color);
    transition: all 0.3s ease;
    cursor: pointer;
}

.drop-zone:hover {
    border-color: var(--primary-color);
    background-color: rgba(78, 115, 223, 0.05);
}

.drop-zone.active {
    border-color: var(--primary-color);
    background-color: rgba(78, 115, 223, 0.1);
}

.file-item {
    transition: transform 0.2s ease;
}

.file-item:hover {
    transform: translateY(-2px);
}

.ad-space {
    background-color: var(--secondary-color);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .sidebar {
        order: -1;
        margin-bottom: 2rem;
    }
}

/* Accessibility improvements */
a:focus, button:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .no-print {
        display: none !important;
    }
    
    body {
        background-color: white;
        color: black;
    }
}