:root {
    --primary-color: #2c3e50;
    --accent-color: #3498db;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    line-height: 1.6;
}

.hero-section {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    padding: 4rem 0;
}

.nav-tabs .nav-link {
    color: var(--primary-color);
    border: none;
    padding: 1rem 1.5rem;
    transition: all 0.3s ease;
}

.nav-tabs .nav-link:hover {
    background-color: rgba(52, 152, 219, 0.1);
}

.nav-tabs .nav-link.active {
    color: var(--accent-color);
    border-bottom: 3px solid var(--accent-color);
    font-weight: 600;
}

.card {
    border: none;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
}

.table {
    font-size: 0.95rem;
}

.table th {
    background-color: #f8f9fa;
    border-top: 2px solid #dee2e6;
}

.btn-outline-primary {
    padding: 0.25rem 0.5rem;
}

.text-muted {
    font-size: 0.85rem;
}