/* ============================================================
           ROOT VARIABLES - Apidog Style
           ============================================================ */
        :root {
            --primary: #22c55e;
            --primary-hover: #16a34a;
            --primary-light: #dcfce7;
            --primary-dark: #15803d;
            --bg-body: #ffffff;
            --bg-card: #ffffff;
            --bg-sidebar: #fafafa;
            --bg-code: #0d1117;
            --bg-input: #f8f8fa;

            --border-color: #e5e7eb;
            --border-dark: #2a2933;

            --text-primary: #111827;
            --text-secondary: #6b7280;
            --text-muted: #9ca3af;

            --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 4px 20px rgba(0, 0, 0, 0.08);

            --radius: 12px;
            --radius-sm: 8px;
        }

        [data-theme="dark"] {
            --bg-body: #1a1922;
            --bg-card: #121216;
            --bg-sidebar: #14131b;
            --bg-code: #0d1117;
            --bg-input: #1f1e2a;

            --border-color: #2a2933;

            --text-primary: #e5e7eb;
            --text-secondary: #9ca3af;
            --text-muted: #6b7280;

            --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.3);
            --shadow-lg: 0 4px 20px rgba(0, 0, 0, 0.5);
        }

        /* ============================================================
           RESET & BASE
           ============================================================ */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            background: var(--bg-body);
            color: var(--text-primary);
            height: 100vh;
            overflow: hidden;
        }

        /* Scrollbar */
        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }

        ::-webkit-scrollbar-track {
            background: transparent;
        }

        ::-webkit-scrollbar-thumb {
            background: var(--border-color);
            border-radius: 4px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-muted);
        }

        /* ============================================================
           APP CONTAINER - 3 Panel Layout
           ============================================================ */
        .app-container {
            display: flex;
            height: 100vh;
            overflow: hidden;
        }

        /* ============================================================
           SIDEBAR (Panel 1)
           ============================================================ */
        .sidebar {
            width: 400px;
            min-width: 400px;
            background: var(--bg-sidebar);
            border-right: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            overflow: hidden;
            flex-shrink: 0;
        }

        .sidebar-header {
            padding: 16px 20px 12px;
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-shrink: 0;
        }

        .sidebar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
        }

        .sidebar-brand-icon {
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 16px;
            flex-shrink: 0;
        }

        .sidebar-brand-title {
            font-weight: 700;
            font-size: 16px;
            color: var(--text-primary);
        }

        .sidebar-search {
            padding: 12px 20px 8px;
            flex-shrink: 0;
        }

        .sidebar-search-wrapper {
            position: relative;
        }

        .sidebar-search-input {
            width: 100%;
            padding: 8px 12px 8px 36px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            background: var(--bg-card);
            color: var(--text-primary);
            font-size: 14px;
            outline: none;
            transition: border-color 0.2s;
        }

        .sidebar-search-input:focus {
            border-color: var(--primary);
        }

        .sidebar-search-icon {
            position: absolute;
            left: 12px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 14px;
            pointer-events: none;
        }

        .sidebar-search-shortcut {
            position: absolute;
            right: 12px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 11px;
            color: var(--text-muted);
            background: var(--border-color);
            padding: 2px 8px;
            border-radius: 4px;
            font-weight: 500;
        }

        .sidebar-nav {
            flex: 1;
            overflow-y: auto;
            padding: 8px 12px 20px;
        }

        .sidebar-nav-label {
            font-size: 11px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            color: var(--text-muted);
            padding: 12px 12px 6px;
        }

        .sidebar-nav-item {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            text-decoration: none;
            font-size: 14px;
            transition: all 0.15s;
            cursor: pointer;
            position: relative;
        }

        .sidebar-nav-item:hover {
            background: var(--primary-light);
            color: var(--text-primary);
        }

        [data-theme="dark"] .sidebar-nav-item:hover {
            background: rgba(147, 115, 238, 0.08);
        }

        .sidebar-nav-item.active {
            background: var(--primary-light);
            color: var(--primary);
            font-weight: 500;
        }

        [data-theme="dark"] .sidebar-nav-item.active {
            background: rgba(147, 115, 238, 0.12);
        }

        .sidebar-nav-item .nav-icon {
            font-size: 16px;
            width: 20px;
            text-align: center;
            flex-shrink: 0;
        }

        .sidebar-nav-item .nav-badge {
            margin-left: auto;
            font-size: 8px;
            padding: 2px 8px;
            border-radius: 12px;
            background: var(--border-color);
            color: var(--text-muted);
        }

        .sidebar-nav-item.active .nav-badge {
            background: var(--primary-light);
            color: var(--primary);
        }

        .sidebar-nav-divider {
            height: 1px;
            background: var(--border-color);
            margin: 8px 12px;
        }

        .sidebar-nav-sub {
            padding-left: 12px;
        }

        .sidebar-nav-item .method-badge {
            font-size: 9px;
            font-weight: 700;
            padding: 1px 6px;
            border-radius: 3px;
            background: #dbeafe;
            color: #2563eb;
            flex-shrink: 0;
        }

        [data-theme="dark"] .sidebar-nav-item .method-badge {
            background: rgba(37, 99, 235, 0.15);
            color: #60a5fa;
        }

        /* Collapsible source */
        .sidebar-source-header {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: all 0.15s;
            user-select: none;
        }

        .sidebar-source-header:hover {
            background: var(--primary-light);
        }

        [data-theme="dark"] .sidebar-source-header:hover {
            background: rgba(147, 115, 238, 0.08);
        }

        .sidebar-source-header .arrow {
            transition: transform 0.2s;
            font-size: 12px;
            color: var(--text-muted);
        }

        .sidebar-source-header .arrow.open {
            transform: rotate(90deg);
        }

        .sidebar-source-children {
            overflow: hidden;
            max-height: 0;
            transition: max-height 0.3s ease;
        }

        .sidebar-source-children.open {
            max-height: 2000px;
        }

        /* ============================================================
           MAIN CONTENT (Panel 2)
           ============================================================ */
        .main-content {
            flex: 1;
            overflow-y: auto;
            padding: 0 40px 40px;
            background: var(--bg-body);
        }

        /* Top Nav */
        .top-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 0 12px;
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            background: var(--bg-body);
            z-index: 10;
            backdrop-filter: blur(12px);
            background: rgba(255, 255, 255, 0.85);
        }

        [data-theme="dark"] .top-nav {
            background: rgba(26, 25, 34, 0.9);
        }

        .top-nav-breadcrumb {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            color: var(--text-secondary);
        }

        .top-nav-breadcrumb span {
            color: var(--text-primary);
        }

        .top-nav-actions {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .top-nav-btn {
            padding: 6px 12px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            background: var(--bg-card);
            color: var(--text-secondary);
            font-size: 13px;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 6px;
            transition: all 0.2s;
        }

        .top-nav-btn:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        .sidebar-toggle-btn {
            display: none;
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            background: var(--bg-card);
            color: var(--text-secondary);
            cursor: pointer;
            font-size: 18px;
        }

        .sidebar-toggle-btn:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        /* Content Header */
        .content-header {
            padding: 24px 0 16px;
        }

        .content-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }

        .content-title .status-badge {
            font-size: 13px;
            font-weight: 400;
            padding: 2px 14px;
            border-radius: 20px;
            background: rgba(59, 130, 246, 0.08);
            color: #3b82f6;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .content-title .status-badge .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: #3b82f6;
            display: inline-block;
        }

        .content-subtitle {
            color: var(--text-secondary);
            font-size: 14px;
            margin-top: 4px;
        }

        /* Endpoint URL */
        .endpoint-url {
            display: flex;
            align-items: stretch;
            padding: 4px;
            border-radius: var(--radius);
            border: 1px solid var(--border-color);
            background: var(--bg-card);
            margin: 16px 0 24px;
            position: sticky;
            top: 72px;
            z-index: 5;
        }

        .endpoint-url .method-tag {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            margin: 4px;
            border-radius: 6px;
            background: #dbeafe;
            color: #2563eb;
            font-weight: 700;
            font-size: 12px;
            flex-shrink: 0;
        }

        [data-theme="dark"] .endpoint-url .method-tag {
            background: rgba(37, 99, 235, 0.15);
            color: #60a5fa;
        }

        .endpoint-url .url-text {
            display: flex;
            align-items: center;
            padding: 0 12px;
            font-size: 14px;
            color: var(--text-primary);
            font-family: 'SF Mono', 'Menlo', monospace;
            flex: 1;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .endpoint-url .url-icon {
            display: flex;
            align-items: center;
            padding: 0 8px;
            color: var(--text-muted);
            cursor: pointer;
        }

        .endpoint-url .url-icon:hover {
            color: var(--primary);
        }

        /* Section */
        .section {
            margin-bottom: 32px;
        }

        .section-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        /* Params Table */
        .params-table {
            width: 100%;
            border-collapse: collapse;
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border-color);
        }

        .params-table th {
            text-align: left;
            padding: 10px 16px;
            background: var(--bg-sidebar);
            font-size: 13px;
            font-weight: 600;
            color: var(--text-secondary);
            border-bottom: 1px solid var(--border-color);
        }

        .params-table td {
            padding: 10px 16px;
            border-bottom: 1px solid var(--border-color);
            font-size: 14px;
        }

        .params-table tr:last-child td {
            border-bottom: none;
        }

        .params-table .param-name {
            font-weight: 500;
            color: var(--text-primary);
            font-family: 'SF Mono', 'Menlo', monospace;
            font-size: 13px;
        }

        .params-table .param-type {
            color: var(--text-secondary);
            font-size: 13px;
        }

        .params-table .param-required {
            color: #ef4444;
            font-size: 12px;
            font-weight: 500;
        }

        .params-table .param-desc {
            color: var(--text-secondary);
            font-size: 13px;
        }

        .params-table .param-example {
            font-family: 'SF Mono', 'Menlo', monospace;
            font-size: 13px;
            color: var(--text-primary);
            background: var(--bg-sidebar);
            padding: 2px 8px;
            border-radius: 4px;
            display: inline-block;
        }

        /* Response */
        .response-item {
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            overflow: hidden;
            margin-bottom: 12px;
        }

        .response-header {
            padding: 12px 16px;
            background: var(--bg-sidebar);
            display: flex;
            align-items: center;
            gap: 12px;
            cursor: pointer;
            border-bottom: 1px solid var(--border-color);
        }

        .response-header .status-code {
            font-weight: 700;
            color: #22c55e;
        }

        .response-header .status-label {
            color: var(--text-secondary);
            font-size: 14px;
        }

        .response-body {
            padding: 16px;
            background: var(--bg-code);
            overflow-x: auto;
        }

        .response-body pre {
            color: #e5e7eb;
            font-family: 'SF Mono', 'Menlo', monospace;
            font-size: 13px;
            line-height: 1.6;
            margin: 0;
            white-space: pre-wrap;
            word-break: break-all;
        }

        /* Code Viewer */
        .code-viewer {
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border-color);
        }

        .code-tabs {
            display: flex;
            gap: 4px;
            padding: 8px 12px;
            background: var(--bg-sidebar);
            border-bottom: 1px solid var(--border-color);
            overflow-x: auto;
        }

        .code-tab {
            padding: 4px 12px;
            border-radius: 4px;
            font-size: 13px;
            color: var(--text-secondary);
            cursor: pointer;
            border: none;
            background: transparent;
            transition: all 0.15s;
        }

        .code-tab:hover {
            color: var(--text-primary);
            background: var(--border-color);
        }

        .code-tab.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 500;
        }

        [data-theme="dark"] .code-tab.active {
            background: rgba(147, 115, 238, 0.12);
        }

        .code-content {
            padding: 16px;
            background: var(--bg-code);
            overflow-x: auto;
        }

        .code-content pre {
            color: #e5e7eb;
            font-family: 'SF Mono', 'Menlo', monospace;
            font-size: 13px;
            line-height: 1.7;
            margin: 0;
        }

        /* Pagination */
        .pagination {
            display: flex;
            gap: 12px;
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
        }

        .pagination-item {
            flex: 1;
            padding: 12px 16px;
            border-radius: var(--radius);
            border: 1px solid var(--border-color);
            text-decoration: none;
            color: var(--text-primary);
            transition: all 0.2s;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .pagination-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-card);
        }

        .pagination-item .direction {
            font-size: 12px;
            color: var(--text-secondary);
        }

        .pagination-item .title {
            font-weight: 500;
        }

        .pagination-item.next {
            text-align: right;
            justify-content: flex-end;
        }

        /* ============================================================
           RIGHT PANEL - Try it out (Panel 3)
           ============================================================ */
        .right-panel {
            width: 450px;
            min-width: 450px;
            border-left: 1px solid var(--border-color);
            background: var(--bg-card);
            display: flex;
            flex-direction: column;
            overflow: hidden;
            flex-shrink: 0;
        }

        .right-panel-header {
            padding: 12px 16px;
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-shrink: 0;
        }

        .right-panel-title {
            font-weight: 600;
            font-size: 14px;
            color: var(--text-primary);
        }

        .right-panel-close {
            cursor: pointer;
            color: var(--text-muted);
            font-size: 18px;
            padding: 4px;
        }

        .right-panel-close:hover {
            color: var(--text-primary);
        }

        .right-panel-body {
            flex: 1;
            overflow-y: auto;
            padding: 16px;
        }

        /* Try it out - Request */
        .try-request {
            display: flex;
            gap: 8px;
            margin-bottom: 16px;
            padding: 4px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            background: var(--bg-input);
        }

        .try-request .method-tag-sm {
            display: inline-flex;
            align-items: center;
            padding: 2px 10px;
            border-radius: 4px;
            background: #dbeafe;
            color: #2563eb;
            font-weight: 700;
            font-size: 11px;
            flex-shrink: 0;
        }

        .try-request .url-input {
            flex: 1;
            border: none;
            background: transparent;
            padding: 6px 8px;
            font-size: 13px;
            color: var(--text-primary);
            outline: none;
            font-family: 'SF Mono', 'Menlo', monospace;
            min-width: 0;
        }

        .try-request .send-btn {
            padding: 4px 16px;
            border-radius: 4px;
            background: var(--primary);
            color: white;
            border: none;
            font-weight: 600;
            font-size: 13px;
            cursor: pointer;
            transition: background 0.2s;
        }

        .try-request .send-btn:hover {
            background: var(--primary-hover);
        }

        /* Try it out - Params */
        .try-params {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            overflow: hidden;
            margin-bottom: 12px;
        }

        .try-params-header {
            padding: 8px 12px;
            background: var(--bg-sidebar);
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            border-bottom: 1px solid var(--border-color);
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .try-params-header .arrow {
            transition: transform 0.2s;
            font-size: 12px;
        }

        .try-params-header .arrow.open {
            transform: rotate(90deg);
        }

        .try-params-body {
            padding: 8px 12px;
        }

        .try-params-body .param-row {
            display: flex;
            gap: 8px;
            margin-bottom: 6px;
            align-items: center;
        }

        .try-params-body .param-row input {
            padding: 4px 8px;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            font-size: 13px;
            background: var(--bg-input);
            color: var(--text-primary);
            outline: none;
            flex: 1;
        }

        .try-params-body .param-row input:focus {
            border-color: var(--primary);
        }

        .try-params-body .param-row .param-key {
            flex: 0 0 35%;
        }

        .try-params-body .param-row .param-value {
            flex: 1;
        }

        .try-params-body .param-row .param-check {
            width: 18px;
            height: 18px;
            cursor: pointer;
            accent-color: var(--primary);
        }

        /* Try it out - Response */
        .try-response {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            overflow: hidden;
            margin-top: 12px;
        }

        .try-response-header {
            padding: 8px 12px;
            background: var(--bg-sidebar);
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .try-response-body {
            padding: 12px;
            background: var(--bg-code);
            min-height: 120px;
            max-height: 300px;
            overflow-y: auto;
        }

        .try-response-body pre {
            color: #e5e7eb;
            font-family: 'SF Mono', 'Menlo', monospace;
            font-size: 12px;
            line-height: 1.6;
            margin: 0;
            white-space: pre-wrap;
            word-break: break-all;
        }

        .try-response-empty {
            color: var(--text-muted);
            font-size: 13px;
            text-align: center;
            padding: 20px 0;
        }

        /* ============================================================
           RESPONSIVE
           ============================================================ */
        @media (max-width: 1400px) {
            .right-panel {
                width: 380px;
                min-width: 380px;
            }
        }

        @media (max-width: 1200px) {
            .sidebar {
                width: 320px;
                min-width: 320px;
            }

            .right-panel {
                width: 350px;
                min-width: 350px;
            }

            .main-content {
                padding: 0 24px 30px;
            }
        }

        @media (max-width: 1024px) {
            .right-panel {
                display: none;
            }

            .sidebar {
                width: 300px;
                min-width: 300px;
            }

            .sidebar-toggle-btn {
                display: flex;
            }
        }

        @media (max-width: 768px) {
            .sidebar {
                display: none;
                position: fixed;
                top: 0;
                left: 0;
                height: 100vh;
                width: 320px;
                z-index: 100;
                box-shadow: var(--shadow-lg);
            }

            .sidebar.open {
                display: flex;
            }

            .sidebar-overlay {
                display: none;
                position: fixed;
                top: 0;
                left: 0;
                width: 100%;
                height: 100%;
                background: rgba(0, 0, 0, 0.5);
                z-index: 99;
            }

            .sidebar-overlay.open {
                display: block;
            }

            .sidebar-toggle-btn {
                display: flex;
            }

            .main-content {
                padding: 0 16px 20px;
            }

            .content-title {
                font-size: 22px;
            }

            .endpoint-url .url-text {
                font-size: 12px;
                padding: 4px 8px;
            }

            .params-table {
                font-size: 13px;
            }

            .params-table th,
            .params-table td {
                padding: 8px 10px;
            }

            .top-nav-breadcrumb {
                font-size: 13px;
            }

            .top-nav-actions .top-nav-btn span {
                display: none;
            }
        }

        @media (max-width: 480px) {
            .sidebar {
                width: 280px;
            }

            .content-title {
                font-size: 18px;
                flex-wrap: wrap;
            }

            .pagination {
                flex-direction: column;
            }

            .pagination-item.next {
                text-align: left;
                justify-content: flex-start;
            }

            .endpoint-url {
                flex-wrap: wrap;
            }

            .endpoint-url .method-tag {
                font-size: 10px;
                padding: 2px 8px;
            }
        }

        /* ============================================================
           LOADING & ERROR
           ============================================================ */
        .loading-state {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 60px 20px;
            gap: 16px;
        }

        .loading-spinner {
            width: 36px;
            height: 36px;
            border: 3px solid var(--border-color);
            border-top-color: var(--primary);
            border-radius: 50%;
            animation: spin 0.8s linear infinite;
        }

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

        .loading-text {
            color: var(--text-secondary);
            font-size: 14px;
        }

        .error-state {
            text-align: center;
            padding: 60px 20px;
        }

        .error-icon {
            font-size: 40px;
            color: #ef4444;
            margin-bottom: 12px;
        }

        .error-text {
            color: var(--text-secondary);
            font-size: 14px;
        }

        .error-btn {
            margin-top: 16px;
            padding: 8px 24px;
            border-radius: var(--radius-sm);
            background: var(--primary);
            color: white;
            border: none;
            cursor: pointer;
            font-size: 14px;
            transition: background 0.2s;
        }

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