:root {
    --primary-color: #0d6efd;
    --success-color: #198754;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #0dcaf0;
    --dark-color: #212529;
    --light-bg: #f8f9fa;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f7fa;
}

/* Navigation */
.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
}

/* Cards */
.demo-card {
    transition: transform 0.2s, box-shadow 0.2s;
    border: none;
}

.demo-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15) !important;
}

.demo-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
}

/* Dashboard Cards */
.kpi-card {
    border: none;
    border-radius: 12px;
    transition: transform 0.2s;
}

.kpi-card:hover {
    transform: translateY(-3px);
}

.kpi-icon {
    width: 50px;
    height: 50px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.kpi-value {
    font-size: 2rem;
    font-weight: 700;
    margin: 10px 0;
}

.kpi-label {
    color: #6c757d;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Tables */
.table-container {
    background: white;
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
}

.table {
    margin-bottom: 0;
}

.table thead th {
    background-color: #f8f9fa;
    border-bottom: 2px solid #dee2e6;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
    color: #495057;
}

.table-hover tbody tr:hover {
    background-color: #f8f9fa;
}

/* Badges */
.badge {
    padding: 0.5em 0.75em;
    font-weight: 500;
}

/* Buttons */
.btn {
    border-radius: 8px;
    padding: 0.5rem 1.2rem;
    font-weight: 500;
}

.btn-sm {
    padding: 0.25rem 0.75rem;
    border-radius: 6px;
}

/* Search and Filter Bar */
.search-filter-bar {
    background: white;
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 20px;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
}

/* Charts Container */
.chart-container {
    background: white;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    height: 100%;
}

.chart-placeholder {
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 8px;
    color: white;
    font-size: 1.2rem;
}

/* Page Header */
.page-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 40px 0;
    margin-bottom: 30px;
}

.page-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.page-subtitle {
    opacity: 0.9;
    font-size: 1.1rem;
}

/* Stats Cards */
.stat-card {
    border-left: 4px solid;
    transition: all 0.2s;
}

.stat-card:hover {
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

.stat-card.primary { border-left-color: var(--primary-color); }
.stat-card.success { border-left-color: var(--success-color); }
.stat-card.danger { border-left-color: var(--danger-color); }
.stat-card.warning { border-left-color: var(--warning-color); }
.stat-card.info { border-left-color: var(--info-color); }

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 10px;
}

/* Status Badges */
.status-approved { background-color: #198754; }
.status-pending { background-color: #ffc107; color: #000; }
.status-rejected { background-color: #dc3545; }
.status-draft { background-color: #6c757d; }
.status-processing { background-color: #0dcaf0; color: #000; }
.status-completed { background-color: #198754; }

/* Forms */
.form-control, .form-select {
    border-radius: 8px;
    border: 1px solid #ced4da;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

/* Modal */
.modal-content {
    border-radius: 12px;
    border: none;
}

.modal-header {
    border-bottom: 1px solid #dee2e6;
    padding: 1.5rem;
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    border-top: 1px solid #dee2e6;
    padding: 1.5rem;
}

/* Responsive */
@media (max-width: 768px) {
    .kpi-value {
        font-size: 1.5rem;
    }
    
    .page-title {
        font-size: 1.5rem;
    }
    
    .action-buttons {
        flex-direction: column;
    }
}

/* Loading Spinner */
.spinner-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 9999;
    align-items: center;
    justify-content: center;
}

.spinner-overlay.show {
    display: flex;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: #6c757d;
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 20px;
    opacity: 0.5;
}

/* Sidebar Navigation (for dashboard) */
.sidebar {
    min-height: calc(100vh - 56px);
    background: white;
    box-shadow: 2px 0 5px rgba(0,0,0,0.1);
    padding-top: 20px;
}

.sidebar .nav-link {
    color: #495057;
    padding: 12px 20px;
    border-radius: 8px;
    margin: 5px 10px;
    transition: all 0.2s;
}

.sidebar .nav-link:hover,
.sidebar .nav-link.active {
    background-color: var(--primary-color);
    color: white;
}

/* Progress Bars */
.progress {
    height: 8px;
    border-radius: 10px;
}

/* Tooltips */
.tooltip {
    font-size: 0.875rem;
}