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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: #f5f5f5;
    color: #333;
}

.navbar {
    background-color: #2c3e50;
    color: white;
    padding: 1rem 2rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
}

.nav-brand h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.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);
}

.main-content {
    max-width: 1400px;
    margin: 2rem auto;
    padding: 0 2rem;
}

.dashboard-container {
    background: white;
    border-radius: 8px;
    padding: 2rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid #eee;
}

.dashboard-header h2 {
    font-size: 2rem;
    color: #2c3e50;
}

.period-selector {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.period-selector input[type="date"] {
    padding: 0.5rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 0.9rem;
}

.period-selector button {
    padding: 0.5rem 1.5rem;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background-color 0.3s;
}

.period-selector button:hover {
    background-color: #2980b9;
}

.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.kpi-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.kpi-card h3 {
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    opacity: 0.9;
}

.kpi-value {
    font-size: 2rem;
    font-weight: 700;
}

.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

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

.chart-card h3 {
    margin-bottom: 1rem;
    color: #2c3e50;
}

.chart-card canvas {
    max-height: 300px;
}

.data-tables {
    margin-top: 2rem;
}

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

.table-card h3 {
    margin-bottom: 1rem;
    color: #2c3e50;
}

table {
    width: 100%;
    border-collapse: collapse;
    table-layout: auto;
}

table thead {
    background-color: #f8f9fa;
}

table th {
    padding: 0.75rem;
    text-align: left;
    font-weight: 600;
    color: #2c3e50;
    border-bottom: 2px solid #dee2e6;
    box-sizing: border-box;
    vertical-align: middle;
}

table td {
    padding: 0.75rem;
    border-bottom: 1px solid #dee2e6;
    box-sizing: border-box;
    vertical-align: middle;
}

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

.loading {
    text-align: center;
    padding: 2rem;
    color: #666;
}

.error {
    background-color: #fee;
    color: #c33;
    padding: 1rem;
    border-radius: 4px;
    margin: 1rem 0;
}

/* ========== ADMIN STYLES ========== */
.admin-container {
    background: white;
    border-radius: 8px;
    padding: 2rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid #eee;
}

.admin-header h2 {
    font-size: 2rem;
    color: #2c3e50;
}

.admin-tabs {
    display: flex;
    gap: 0.5rem;
}

.tab-btn {
    padding: 0.5rem 1.5rem;
    background-color: #ecf0f1;
    color: #2c3e50;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s;
}

.tab-btn:hover {
    background-color: #bdc3c7;
}

.tab-btn.active {
    background-color: #3498db;
    color: white;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.section-header h3 {
    font-size: 1.5rem;
    color: #2c3e50;
}

.btn-primary {
    padding: 0.5rem 1.5rem;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background-color 0.3s;
}

.btn-primary:hover {
    background-color: #2980b9;
}

.btn-secondary {
    padding: 0.5rem 1.5rem;
    background-color: #95a5a6;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background-color 0.3s;
}

.btn-secondary:hover {
    background-color: #7f8c8d;
}

.btn-sm {
    padding: 0.25rem 0.75rem;
    font-size: 0.8rem;
}

.btn-danger {
    background-color: #e74c3c;
}

.btn-danger:hover {
    background-color: #c0392b;
}

.table-container {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
    table-layout: auto;
}

.data-table thead {
    background-color: #f8f9fa;
}

.data-table th {
    padding: 0.75rem;
    text-align: left;
    font-weight: 600;
    color: #2c3e50;
    border-bottom: 2px solid #dee2e6;
    box-sizing: border-box;
    vertical-align: middle;
}

.data-table td {
    padding: 0.75rem;
    border-bottom: 1px solid #dee2e6;
    box-sizing: border-box;
    vertical-align: middle;
}

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

.data-table .empty,
.data-table .loading,
.data-table .error {
    text-align: center;
    padding: 2rem;
    color: #666;
}

.badge {
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
}

.badge-success {
    background-color: #2ecc71;
    color: white;
}

.badge-danger {
    background-color: #e74c3c;
    color: white;
}

.badge-info {
    background-color: #3498db;
    color: white;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    overflow: auto;
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    padding: 0;
    border-radius: 8px;
    width: 90%;
    max-width: 600px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid #eee;
}

.modal-header h3 {
    margin: 0;
    color: #2c3e50;
}

.close {
    color: #aaa;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close:hover,
.close:focus {
    color: #000;
}

.modal-content form {
    padding: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-section {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid #eee;
}

.form-section:last-child {
    border-bottom: none;
}

.form-section h4 {
    margin-bottom: 1rem;
    color: #2c3e50;
    font-size: 1.1rem;
}

.integration-group {
    margin-bottom: 1.5rem;
}

.integration-label {
    display: flex;
    align-items: center;
    font-weight: 500;
    cursor: pointer;
    margin-bottom: 0.5rem;
}

.integration-label input[type="checkbox"] {
    margin-right: 0.5rem;
    cursor: pointer;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: #2c3e50;
    font-weight: 500;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 0.9rem;
}

.form-group select:disabled {
    background-color: #f5f5f5;
    cursor: not-allowed;
}

.btn-sm {
    padding: 0.25rem 0.75rem;
    font-size: 0.8rem;
    margin-top: 0.5rem;
}

.form-group input[type="checkbox"] {
    margin-right: 0.5rem;
}

.form-group small {
    display: block;
    margin-top: 0.25rem;
    color: #666;
    font-size: 0.8rem;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    padding-top: 1rem;
    border-top: 1px solid #eee;
    margin-top: 1.5rem;
}

@media (max-width: 768px) {
    .dashboard-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .kpi-grid {
        grid-template-columns: 1fr;
    }
    
    .charts-grid {
        grid-template-columns: 1fr;
    }
    
    .admin-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .modal-content {
        width: 95%;
        margin: 10% auto;
    }
}