:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
    color: #333;
}

.navbar {
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.navbar-brand {
    font-weight: 600;
    font-size: 1.3rem;
}

.card {
    border: none;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    border-radius: 8px;
    margin-bottom: 1.5rem;
}

.card-header {
    border-radius: 8px 8px 0 0 !important;
    font-weight: 600;
    padding: 1rem 1.25rem;
}

.card-body {
    padding: 1.5rem;
}

.btn {
    border-radius: 6px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background-color: #0056b3;
    border-color: #0056b3;
}

.table {
    margin-bottom: 0;
}

.table thead th {
    border-bottom: 2px solid #dee2e6;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
    color: #495057;
}

.table-hover tbody tr:hover {
    background-color: #f5f5f5;
}

.badge {
    padding: 0.5rem 0.75rem;
    font-weight: 500;
    border-radius: 4px;
}

.alert {
    border: none;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.form-control {
    border-radius: 6px;
    border: 1px solid #dee2e6;
    padding: 0.75rem 1rem;
    transition: all 0.3s ease;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

.form-label {
    font-weight: 500;
    color: #495057;
    margin-bottom: 0.5rem;
}

.list-group-item {
    border: none;
    border-bottom: 1px solid #dee2e6;
    padding: 1rem 1.25rem;
    transition: all 0.3s ease;
}

.list-group-item:hover {
    background-color: #f8f9fa;
    padding-left: 1.5rem;
}

.list-group-item.active {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.modal-content {
    border: none;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    border-radius: 8px;
}

.modal-header {
    border-bottom: 1px solid #dee2e6;
    background-color: #f8f9fa;
    border-radius: 8px 8px 0 0;
}

.modal-title {
    font-weight: 600;
}

.pagination {
    margin-top: 1.5rem;
}

.page-link {
    border-radius: 6px;
    margin: 0 2px;
    border: 1px solid #dee2e6;
    color: var(--primary-color);
}

.page-link:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.page-item.active .page-link {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.min-vh-100 {
    min-height: 100vh;
}

.text-muted {
    color: #6c757d !important;
}

.bg-light {
    background-color: #f8f9fa !important;
}

h1, h2, h3, h4, h5, h6 {
    color: #212529;
    font-weight: 600;
}

.page-title {
    margin-top: 0.25rem;
    margin-bottom: 1.5rem;
    font-size: 1.9rem;
    line-height: 1.2;
}

.page-title .bi {
    margin-right: 0.5rem;
}

@media (max-width: 768px) {
    .page-title {
        font-size: 1.6rem;
    }
}

.page-wrapper {
    padding-top: 1.5rem;
    padding-bottom: 2rem;
}

.page-wrapper.container,
.page-wrapper.container-fluid {
    margin-top: 0 !important;
}

.nav-tabs {
    border-bottom: 2px solid #dee2e6;
}

.nav-tabs .nav-link {
    color: #495057;
    border: none;
    border-bottom: 3px solid transparent;
    font-weight: 500;
    transition: all 0.3s ease;
}

.nav-tabs .nav-link:hover {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.nav-tabs .nav-link.active {
    color: var(--primary-color);
    background-color: transparent;
    border-bottom-color: var(--primary-color);
}

pre {
    background-color: #f8f9fa;
    border: 1px solid #dee2e6;
    border-radius: 6px;
    padding: 1rem;
    overflow-x: auto;
    font-size: 0.85rem;
}

.table-responsive {
    border-radius: 6px;
}

@media (max-width: 768px) {
    .container-fluid {
        padding: 0.5rem;
    }
    
    .card {
        margin-bottom: 1rem;
    }
    
    .btn {
        font-size: 0.9rem;
        padding: 0.4rem 0.8rem;
    }
}

.text-white {
    color: white !important;
}

.bg-primary {
    background-color: var(--primary-color) !important;
}

.bg-success {
    background-color: var(--success-color) !important;
}

.bg-danger {
    background-color: var(--danger-color) !important;
}

.bg-warning {
    background-color: var(--warning-color) !important;
}

.bg-info {
    background-color: var(--info-color) !important;
}

.bg-dark {
    background-color: #343a40 !important;
}

.bg-secondary {
    background-color: var(--secondary-color) !important;
}