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

:root {
    --primary: #0066cc;
    --secondary: #6c757d;
    --success: #28a745;
    --danger: #dc3545;
    --warning: #ffc107;
    --info: #17a2b8;
    --light: #f8f9fa;
    --dark: #343a40;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f4f4f4;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.navbar {
    background-color: var(--dark);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand a {
    font-size: 1.5rem;
    font-weight: bold;
    color: white;
    text-decoration: none;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-link {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.nav-link:hover {
    background-color: rgba(255,255,255,0.1);
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-left: 20px;
    padding-left: 20px;
    border-left: 1px solid rgba(255,255,255,0.2);
}

.user-name {
    font-weight: bold;
}

.user-role {
    color: #aaa;
    font-size: 0.9rem;
}

.main-content {
    padding: 2rem 0;
    min-height: calc(100vh - 200px);
}

.footer {
    background-color: var(--dark);
    color: white;
    text-align: center;
    padding: 1.5rem 0;
    margin-top: 3rem;
}

.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background-color: #0052a3;
}

.btn-success {
    background-color: var(--success);
    color: white;
}

.btn-success:hover {
    background-color: #218838;
}

.btn-danger {
    background-color: var(--danger);
    color: white;
}

.btn-danger:hover {
    background-color: #c82333;
}

.btn-secondary {
    background-color: var(--secondary);
    color: white;
}

.btn-secondary:hover {
    background-color: #5a6268;
}

.btn-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
}

.btn-block {
    display: block;
    width: 100%;
}

.card {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 1.5rem;
}

.card-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid #dee2e6;
    background-color: #f8f9fa;
    border-radius: 8px 8px 0 0;
}

.card-header h3 {
    margin: 0;
    font-size: 1.25rem;
}

.card-body {
    padding: 1.5rem;
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid #dee2e6;
}

.table th {
    background-color: #f8f9fa;
    font-weight: bold;
}

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

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid #ced4da;
    border-radius: 4px;
    font-size: 1rem;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0,102,204,0.1);
}

textarea.form-control {
    min-height: 100px;
    resize: vertical;
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
    font-weight: bold;
    border-radius: 4px;
}

.badge-info {
    background-color: var(--info);
    color: white;
}

.badge-warning {
    background-color: var(--warning);
    color: var(--dark);
}

.badge-success {
    background-color: var(--success);
    color: white;
}

.badge-danger {
    background-color: var(--danger);
    color: white;
}

.badge-secondary {
    background-color: var(--secondary);
    color: white;
}

.alert {
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-danger {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-warning {
    background-color: #fff3cd;
    color: #856404;
    border: 1px solid #ffeaa7;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.stat-icon {
    font-size: 3rem;
}

.stat-info h3 {
    margin: 0;
    font-size: 2rem;
    color: var(--primary);
}

.stat-info p {
    margin: 0;
    color: #666;
}

.stat-success .stat-info h3 {
    color: var(--success);
}

.stat-warning .stat-info h3 {
    color: var(--warning);
}

.stat-info .stat-info h3 {
    color: var(--info);
}

.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -10px;
}

.col-md-4 {
    flex: 0 0 33.333%;
    padding: 0 10px;
}

.col-md-8 {
    flex: 0 0 66.666%;
    padding: 0 10px;
}

.col-md-3 {
    flex: 0 0 25%;
    padding: 0 10px;
}

.col-md-2 {
    flex: 0 0 16.666%;
    padding: 0 10px;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.page-header h1 {
    margin: 0;
}

.text-center {
    text-align: center;
}

.mt-3 {
    margin-top: 1rem;
}

.mt-4 {
    margin-top: 1.5rem;
}

.mb-2 {
    margin-bottom: 0.5rem;
}

.mb-4 {
    margin-bottom: 1.5rem;
}

.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-box {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
}

.login-box h1 {
    text-align: center;
    margin-bottom: 0.5rem;
    font-size: 2rem;
}

.login-box h2 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: #666;
    font-size: 1.5rem;
}

.login-footer {
    margin-top: 1.5rem;
    text-align: center;
    color: #666;
}

.filter-form {
    display: flex;
}

@media (max-width: 768px) {
    .nav-menu {
        flex-direction: column;
        gap: 10px;
    }
    
    .col-md-4, .col-md-8, .col-md-3, .col-md-2 {
        flex: 0 0 100%;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
}