:root {
    --primary-color: #2c5aa0;
    --primary-dark: #1e3a7a;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-color: #1e293b;
    --text-muted: #64748b;
    --text-secondary: #475569;
    --border-color: #e2e8f0;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

/* Dashboard Layout */
.dashboard {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    background: var(--card-bg);
    border-right: 1px solid var(--border-color);
    padding: 20px 0;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.sidebar-header {
    padding: 0 20px 20px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header h2 {
    font-size: 20px;
    color: var(--primary-color);
}

.sidebar-menu {
    list-style: none;
    padding: 20px 0;
}

.sidebar-menu li {
    margin-bottom: 4px;
}

.sidebar-menu a {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    color: var(--text-color);
    text-decoration: none;
    transition: all 0.3s;
}

.sidebar-menu a:hover,
.sidebar-menu a.active {
    background: var(--bg-color);
    color: var(--primary-color);
}

.sidebar-menu a i {
    margin-right: 12px;
    width: 20px;
}

.main-content {
    flex: 1;
    margin-left: 260px;
    padding: 0;
}

.topbar {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 16px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.topbar h1 {
    font-size: 24px;
    color: var(--text-color);
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 16px;
}

.user-info {
    text-align: right;
}

.user-name {
    font-weight: 500;
    color: var(--text-color);
    font-size: 14px;
}

.user-role {
    font-size: 12px;
    color: var(--text-muted);
}

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

/* Submenu Styles */
.menu-item-has-children {
    position: relative;
}

.menu-toggle {
    display: flex !important;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    cursor: pointer;
}

.menu-toggle .arrow {
    font-size: 10px;
    transition: transform 0.3s ease;
    margin-left: auto;
}

.menu-item-has-children.active .arrow {
    transform: rotate(180deg);
}

.submenu {
    display: none;
    background: var(--bg-color);
    margin: 0;
    padding: 0;
    list-style: none;
    border-left: 2px solid var(--primary-color);
    margin-left: 10px;
}

.menu-item-has-children.active .submenu {
    display: block;
}

.category-header {
    padding: 8px 20px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    background: rgba(0, 0, 0, 0.03);
    border-bottom: 1px solid var(--border-color);
}

.category-items {
    list-style: none;
    margin: 0;
    padding: 0;
}

.category-items li a {
    padding: 8px 20px 8px 40px !important;
    font-size: 13px;
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s ease;
}

.category-items li a:hover {
    background: var(--bg-color);
    color: var(--primary-color);
    padding-left: 45px !important;
}

.category-items li a.active {
    background: var(--bg-color);
    color: var(--primary-color);
    font-weight: 500;
}

.menu-divider {
    height: 1px;
    background: var(--border-color);
    margin: 8px 20px;
    list-style: none;
}

/* Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--card-bg);
    padding: 24px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    border-left: 4px solid var(--primary-color);
}

.stat-card.success {
    border-left-color: var(--success-color);
}

.stat-card.warning {
    border-left-color: var(--warning-color);
}

.stat-card.danger {
    border-left-color: var(--danger-color);
}

.stat-label {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.stat-value {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-color);
}

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
}

.card-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
}

.card-header .btn {
    flex-shrink: 0;
    white-space: nowrap;
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-color);
}

.card-body {
    padding: 20px;
}

/* Table */
.table-responsive {
    overflow-x: auto;
}

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

table thead {
    background: var(--bg-color);
}

table th {
    padding: 12px;
    text-align: left;
    font-weight: 600;
    color: var(--text-color);
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

table td {
    padding: 12px;
    border-top: 1px solid var(--border-color);
    font-size: 14px;
}

table tbody tr:hover {
    background: var(--bg-color);
}

table th.text-right,
table td.text-right {
    text-align: right;
}

table th.text-center,
table td.text-center {
    text-align: center;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    text-align: center;
}

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

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

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

.btn-secondary:hover {
    background: #475569;
}

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

.btn-danger:hover {
    background: #dc2626;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 13px;
}

.btn-icon {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 18px;
    padding: 6px;
    border-radius: 6px;
    transition: all 0.3s;
}

.btn-icon:hover {
    background: var(--bg-color);
}

.btn-edit:hover {
    background: rgba(44, 90, 160, 0.1);
}

.btn-delete:hover {
    background: rgba(239, 68, 68, 0.1);
}

/* Loading */
.loading {
    text-align: center;
    padding: 40px;
    color: var(--text-muted);
}

.spinner {
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto 16px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

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

.modal-content {
    background-color: var(--card-bg);
    margin: 5% auto;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    width: 90%;
    max-width: 600px;
    animation: slideDown 0.3s ease-out;
}

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

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

.modal-header h3 {
    margin: 0;
    color: var(--text-color);
    font-size: 20px;
}

.close {
    color: var(--text-muted);
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s;
}

.close:hover {
    color: var(--danger-color);
}

.modal-body {
    padding: 20px;
}

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

/* Form Styles */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-color);
    font-weight: 500;
    font-size: 14px;
}

.form-control,
.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
    font-family: inherit;
    transition: border-color 0.3s;
}

.form-control:focus,
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(44, 90, 160, 0.1);
}

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

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

/* Search Bar */
.search-bar {
    margin-bottom: 20px;
}

.search-input {
    width: 100%;
    max-width: 400px;
    padding: 10px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(44, 90, 160, 0.1);
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 8px;
    justify-content: center;
    align-items: center;
}

/* Alert */
.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
}

.alert-error {
    background: #fee;
    color: var(--danger-color);
    border: 1px solid var(--danger-color);
}

.alert-success {
    background: #efe;
    color: var(--success-color);
    border: 1px solid var(--success-color);
}

/* Utilities */
.text-center {
    text-align: center;
}

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

.mt-20 {
    margin-top: 20px;
}

/* Context Selector */
.context-selector {
    background: var(--card-bg);
    border-bottom: 2px solid var(--primary-color);
    padding: 12px 20px;
    margin-bottom: 20px;
    box-shadow: var(--shadow);
}

.context-selector-content {
    display: flex;
    gap: 20px;
    align-items: center;
    flex-wrap: wrap;
}

.context-field {
    display: flex;
    align-items: center;
    gap: 8px;
}

.context-field label {
    font-weight: 600;
    color: var(--text-color);
    font-size: 0.9rem;
    white-space: nowrap;
}

.context-field select {
    min-width: 200px;
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: white;
    color: var(--text-color);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
}

.context-field select:hover {
    border-color: var(--primary-color);
}

.context-field select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(44, 90, 160, 0.1);
}

/* Operation Filter */
.operation-filter {
    display: flex;
    align-items: flex-end;
    gap: 15px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 6px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.filter-field {
    display: flex;
    flex-direction: column;
    gap: 5px;
    min-width: 200px;
}

.filter-field label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin: 0;
}

.filter-field select {
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    background: white;
    font-size: 14px;
    transition: all 0.2s;
}

.filter-field select:hover {
    border-color: var(--primary-color);
}

.filter-field select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(44, 90, 160, 0.1);
}

.operation-filter .btn-sm {
    padding: 8px 16px;
    font-size: 14px;
    margin-top: auto;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

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

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

    .modal-content {
        width: 95%;
        margin: 10% auto;
    }

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

    .search-input {
        max-width: 100%;
    }
}