:root {
    --primary-color: #4F46E5;
    --primary-dark: #4338CA;
    --primary-light: #6366F1;
    --secondary-color: #10B981;
    --danger-color: #EF4444;
    --warning-color: #F59E0B;
    --info-color: #3B82F6;
    --success-color: #10B981;
    --dark: #1F2937;
    --dark-light: #374151;
    --gray: #6B7280;
    --gray-light: #9CA3AF;
    --gray-lighter: #E5E7EB;
    --gray-lightest: #F3F4F6;
    --white: #FFFFFF;
    --sidebar-width: 280px;
    --header-height: 70px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--gray-lightest);
    color: var(--dark);
    line-height: 1.6;
}

/* Sidebar */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--dark);
    color: var(--white);
    overflow-y: auto;
    z-index: 1000;
    transition: var(--transition);
}

.sidebar::-webkit-scrollbar {
    width: 6px;
}

.sidebar::-webkit-scrollbar-thumb {
    background: var(--dark-light);
    border-radius: 3px;
}

.sidebar-header {
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid var(--dark-light);
}

.sidebar-header i {
    font-size: 28px;
    color: var(--primary-light);
}

.sidebar-header h2 {
    font-size: 22px;
    font-weight: 600;
}

.sidebar-nav {
    padding: 20px 0;
}

.nav-section {
    padding: 15px 20px 8px;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--gray);
    font-weight: 600;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    color: var(--gray-light);
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
}

.nav-item:hover {
    background: var(--dark-light);
    color: var(--white);
}

.nav-item.active {
    background: var(--primary-color);
    color: var(--white);
    border-left: 3px solid var(--primary-light);
}

.nav-item i {
    width: 20px;
    text-align: center;
    font-size: 16px;
}

/* Main Content */
.main-content {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    transition: var(--transition);
}

/* Header */
.header {
    position: sticky;
    top: 0;
    height: var(--header-height);
    background: var(--white);
    border-bottom: 1px solid var(--gray-lighter);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 30px;
    z-index: 100;
}

.btn-menu {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--dark);
    cursor: pointer;
    padding: 8px;
}

.header-search {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--gray-lightest);
    padding: 10px 16px;
    border-radius: 8px;
    width: 400px;
}

.header-search i {
    color: var(--gray);
}

.header-search input {
    border: none;
    background: none;
    outline: none;
    flex: 1;
    font-size: 14px;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.btn-icon {
    position: relative;
    background: none;
    border: none;
    font-size: 20px;
    color: var(--gray);
    cursor: pointer;
    padding: 8px;
    border-radius: 6px;
    transition: var(--transition);
}

.btn-icon:hover {
    background: var(--gray-lightest);
    color: var(--dark);
}

.btn-icon .badge {
    position: absolute;
    top: 4px;
    right: 4px;
    background: var(--danger-color);
    color: var(--white);
    font-size: 10px;
    padding: 2px 6px;
    border-radius: 10px;
    font-weight: 600;
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    padding: 6px 12px;
    border-radius: 8px;
    transition: var(--transition);
}

.user-menu:hover {
    background: var(--gray-lightest);
}

.user-menu img {
    width: 36px;
    height: 36px;
    border-radius: 50%;
}

.user-menu span {
    font-weight: 500;
    color: var(--dark);
}

.user-menu i {
    font-size: 12px;
    color: var(--gray);
}

/* Logout Button */
.btn-logout {
    display: flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, var(--danger-color) 0%, #DC2626 100%);
    color: var(--white);
    border: none;
    padding: 10px 16px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.btn-logout:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.btn-logout:active {
    transform: translateY(0);
}

.btn-logout i {
    font-size: 16px;
}

.user-menu span {
    font-weight: 500;
    font-size: 14px;
}

/* Content */
.content {
    padding: 30px;
}

.module-container {
    display: none;
}

.module-container.active {
    display: block;
    animation: fadeIn 0.3s;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.module-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.module-header h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--dark);
}

.module-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-secondary {
    background: var(--gray-lighter);
    color: var(--dark);
}

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

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

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

.btn-sm {
    padding: 6px 12px;
    font-size: 13px;
}

/* Select */
.select-period, .select-chart-period {
    padding: 10px 16px;
    border: 1px solid var(--gray-lighter);
    border-radius: 8px;
    background: var(--white);
    font-size: 14px;
    cursor: pointer;
    outline: none;
}

/* KPI Cards */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

@media (min-width: 1400px) {
    .kpi-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.kpi-card {
    background: var(--white);
    border-radius: 12px;
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    transition: var(--transition);
}

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

.kpi-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--white);
}

.kpi-content {
    flex: 1;
}

.kpi-label {
    font-size: 13px;
    color: var(--gray);
    margin-bottom: 6px;
}

.kpi-value {
    font-size: 26px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 6px;
}

.kpi-change {
    font-size: 12px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 4px;
}

.kpi-change.positive {
    color: var(--success-color);
}

.kpi-change.negative {
    color: var(--danger-color);
}

/* Charts */
.charts-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: 24px;
    margin-bottom: 30px;
}

.chart-card {
    background: var(--white);
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    transition: var(--transition);
    overflow: hidden;
}

.chart-card:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.chart-card-large {
    grid-column: span 2;
}

.chart-card-medium {
    grid-column: span 1;
}

.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.chart-header h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--dark);
}

.chart-container {
    position: relative;
    height: 320px;
    width: 100%;
}

.chart-container-doughnut {
    height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.chart-container canvas {
    max-height: 100%;
    width: 100% !important;
}

/* Summary Grid */
.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 24px;
}

.summary-card {
    background: var(--white);
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.summary-card h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--dark);
}

.summary-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--gray-lightest);
}

.summary-item:last-child {
    border-bottom: none;
}

.summary-item span {
    color: var(--gray);
    font-size: 14px;
}

.summary-item strong {
    font-size: 15px;
    font-weight: 600;
}

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

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

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

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

/* Activity List */
.activity-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.activity-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--gray-lightest);
    border-radius: 8px;
}

.activity-item i {
    font-size: 8px;
}

.activity-item span {
    flex: 1;
    font-size: 14px;
    color: var(--dark);
}

.activity-item small {
    font-size: 12px;
    color: var(--gray);
}

/* Project Progress */
.project-progress {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.progress-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.progress-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.progress-header span {
    font-size: 14px;
    color: var(--dark);
}

.progress-header strong {
    font-size: 14px;
    color: var(--primary-color);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--gray-lightest);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    border-radius: 4px;
    transition: var(--transition);
}

/* Table */
.table-container {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.table-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--gray-lighter);
}

.table-header h3 {
    font-size: 18px;
    font-weight: 600;
}

.table-actions {
    display: flex;
    gap: 12px;
}

.search-box {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--gray-lightest);
    padding: 8px 12px;
    border-radius: 6px;
}

.search-box input {
    border: none;
    background: none;
    outline: none;
    width: 200px;
    font-size: 14px;
}

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

thead {
    background: var(--gray-lightest);
}

thead th {
    padding: 16px;
    text-align: left;
    font-size: 13px;
    font-weight: 600;
    color: var(--gray);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

tbody td {
    padding: 16px;
    border-top: 1px solid var(--gray-lighter);
    font-size: 14px;
}

tbody tr:hover {
    background: var(--gray-lightest);
}

.table-actions-cell {
    display: flex;
    gap: 8px;
}

/* Badge */
.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.badge-success {
    background: #D1FAE5;
    color: #065F46;
}

.badge-danger {
    background: #FEE2E2;
    color: #991B1B;
}

.badge-warning {
    background: #FEF3C7;
    color: #92400E;
}

.badge-info {
    background: #DBEAFE;
    color: #1E40AF;
}

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

/* Form */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 14px;
    font-weight: 500;
    color: var(--dark);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 10px 12px;
    border: 1px solid var(--gray-lighter);
    border-radius: 6px;
    font-size: 14px;
    font-family: inherit;
    outline: none;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

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

.form-group-full {
    grid-column: 1 / -1;
}

/* Modal */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 2000;
}

.modal-overlay.active {
    display: block;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 99999;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 99998;
}

.modal-container {
    position: relative;
    z-index: 99999;
    background: var(--white);
    border-radius: 16px;
    max-width: 800px;
    width: 90%;
    max-height: 90vh;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: modalSlideIn 0.3s ease;
}

.modal.active {
    display: block;
    animation: modalSlideIn 0.3s;
}

@keyframes modalSlideIn {
    from { opacity: 0; transform: translateY(-50px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px;
    border-bottom: 1px solid var(--gray-lighter);
}

.modal-header h2 {
    font-size: 20px;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    color: var(--gray);
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    transition: var(--transition);
}

.modal-close:hover {
    background: var(--gray-lightest);
    color: var(--dark);
}

.modal-body {
    padding: 24px;
    max-height: calc(90vh - 180px);
    overflow-y: auto;
    overflow-x: hidden;
}

.modal-body::-webkit-scrollbar {
    width: 8px;
}

.modal-body::-webkit-scrollbar-track {
    background: var(--gray-lightest);
    border-radius: 4px;
}

.modal-body::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 4px;
}

.modal-body::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 20px 24px;
    border-top: 1px solid var(--gray-lighter);
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    padding: 20px;
}

.pagination button {
    padding: 8px 12px;
    border: 1px solid var(--gray-lighter);
    background: var(--white);
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
}

.pagination button:hover:not(:disabled) {
    background: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

.pagination button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.pagination span {
    font-size: 14px;
    color: var(--gray);
}

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

.empty-state i {
    font-size: 64px;
    color: var(--gray-lighter);
    margin-bottom: 16px;
}

.empty-state h3 {
    font-size: 20px;
    color: var(--dark);
    margin-bottom: 8px;
}

.empty-state p {
    color: var(--gray);
    margin-bottom: 24px;
}

/* Loading */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--gray-lighter);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Responsive */
@media (max-width: 1400px) {
    .charts-row {
        grid-template-columns: 1fr;
    }

    .chart-card-large,
    .chart-card-medium {
        grid-column: span 1;
    }
}

@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.active {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
    }

    .btn-menu {
        display: block;
    }

    .header-search {
        width: 250px;
    }

    .charts-row {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .chart-container {
        height: 280px;
    }

    .chart-container-doughnut {
        height: 250px;
    }
}

@media (max-width: 768px) {
    .content {
        padding: 20px;
    }

    .module-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }

    .kpi-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .header-search {
        display: none;
    }

    .btn-logout span {
        display: none;
    }

    .btn-logout {
        padding: 10px 12px;
    }

    .header-actions {
        gap: 12px;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

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

    table {
        min-width: 600px;
    }

    .charts-row {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .chart-container {
        height: 250px;
    }

    .chart-container-doughnut {
        height: 220px;
    }

    .chart-card {
        padding: 16px;
    }

    .summary-grid {
        grid-template-columns: 1fr;
    }
}

/* Additional utility classes */
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }

.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }

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

.fw-bold { font-weight: 600; }
.fw-normal { font-weight: 400; }

.d-flex { display: flex; }
.flex-column { flex-direction: column; }
.align-items-center { align-items: center; }
.justify-content-between { justify-content: space-between; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.gap-3 { gap: 24px; }