:root {
            --bg-page: #f8fafc;
            --bg-card: #ffffff;
            --bg-surface: #ffffff;
            --border-color: #e2e8f0;
            --border-subtle: #f1f5f9;
            --text-main: #0f172a;
            --text-muted: #64748b;
            --text-light: #94a3b8;
            --primary: #2563eb;
            --primary-hover: #1d4ed8;
            --primary-light: #eff6ff;
            --primary-border: #bfdbfe;
            --success: #16a34a;
            --success-bg: #f0fdf4;
            --success-border: #bbf7d0;
            --warning: #d97706;
            --warning-bg: #fffbeb;
            --warning-border: #fde68a;
            --danger: #dc2626;
            --danger-bg: #fef2f2;
            --danger-border: #fecaca;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 14px;
            --shadow-card: 0 1px 3px 0 rgba(15, 23, 42, 0.04), 0 1px 2px -1px rgba(15, 23, 42, 0.04);
            --shadow-hover: 0 6px 16px -2px rgba(15, 23, 42, 0.08), 0 2px 6px -1px rgba(15, 23, 42, 0.04);
        }

        :root[data-theme="dark"] {
            --bg-page: #0b0f17;
            --bg-card: #131b26;
            --bg-surface: #182232;
            --border-color: #243247;
            --border-subtle: #192333;
            --text-main: #f1f5f9;
            --text-muted: #94a3b8;
            --text-light: #64748b;
            --primary: #3b82f6;
            --primary-hover: #2563eb;
            --primary-light: rgba(59, 130, 246, 0.15);
            --primary-border: rgba(59, 130, 246, 0.35);
            --success: #22c55e;
            --success-bg: rgba(34, 197, 94, 0.15);
            --success-border: rgba(34, 197, 94, 0.3);
            --warning: #f59e0b;
            --warning-bg: rgba(245, 158, 11, 0.15);
            --warning-border: rgba(245, 158, 11, 0.3);
            --danger: #ef4444;
            --danger-bg: rgba(239, 68, 68, 0.15);
            --danger-border: rgba(239, 68, 68, 0.3);
            --shadow-card: 0 1px 3px 0 rgba(0, 0, 0, 0.3);
            --shadow-hover: 0 6px 16px -2px rgba(0, 0, 0, 0.5);
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-page);
            color: var(--text-main);
            line-height: 1.5;
            -webkit-font-smoothing: antialiased;
            font-feature-settings: "cv02", "cv03", "cv04", "cv11", "tnum";
            transition: background-color 0.2s ease, color 0.2s ease;
        }

        /* Top Navigation Header */
        .site-header {
            background: var(--bg-card);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.02);
            transition: background 0.2s ease, border-color 0.2s ease;
        }

        .header-inner {
            max-width: 1400px;
            margin: 0 auto;
            padding: 12px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .brand-wrap {
            display: flex;
            align-items: center;
            gap: 12px;
            text-decoration: none;
            color: inherit;
        }

        .brand-logo {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, #2563eb, #1d4ed8);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 2px 6px rgba(37, 99, 235, 0.25);
            flex-shrink: 0;
        }

        .brand-text {
            display: flex;
            flex-direction: column;
        }

        .brand-title {
            font-size: 17px;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--text-main);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .brand-badge-tag {
            font-size: 10px;
            font-weight: 600;
            padding: 1px 6px;
            border-radius: 4px;
            background: var(--primary-light);
            color: var(--primary);
            border: 1px solid var(--primary-border);
        }

        .brand-subtitle {
            font-size: 12px;
            color: var(--text-muted);
            font-weight: 400;
        }

        /* Header Right Controls */
        .header-right {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }

        /* Network Diagnostics Widget */
        .diag-pill {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 12.5px;
            color: var(--text-muted);
            background: var(--bg-page);
            border: 1px solid var(--border-color);
            padding: 6px 14px;
            border-radius: 9999px;
            cursor: default;
            transition: all 0.2s ease;
        }

        .diag-item {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .diag-val {
            font-weight: 600;
            color: var(--text-main);
            font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
        }

        .diag-copy {
            cursor: pointer;
            color: var(--text-light);
            transition: color 0.15s;
        }

        .diag-copy:hover {
            color: var(--primary);
        }

        .diag-divider {
            width: 1px;
            height: 12px;
            background: var(--border-color);
        }

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

        .header-action-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 12px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            color: var(--text-muted);
            font-size: 12.5px;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.15s ease;
        }

        .header-action-btn:hover {
            color: var(--text-main);
            border-color: var(--primary-border);
            background: var(--primary-light);
        }

        /* Progress Bar */
        .progress-bar-wrap {
            height: 3px;
            background: transparent;
            position: relative;
            overflow: hidden;
        }

        .progress-bar-inner {
            height: 100%;
            background: linear-gradient(90deg, #3b82f6, #60a5fa);
            width: 0%;
            transition: width 0.15s ease;
        }

        /* Main Container */
        .main-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 20px 24px 60px;
        }

        /* Tabs Container */
        .tabs-nav {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 6px;
            margin-bottom: 16px;
            box-shadow: var(--shadow-card);
            overflow-x: auto;
            scrollbar-width: thin;
        }

        .tabs-list {
            display: flex;
            gap: 4px;
            min-width: max-content;
        }

        .tab-btn {
            padding: 8px 14px;
            border-radius: var(--radius-md);
            border: none;
            background: transparent;
            color: var(--text-muted);
            font-size: 13.5px;
            font-weight: 500;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: all 0.15s ease;
        }

        .tab-btn:hover {
            color: var(--text-main);
            background: var(--bg-page);
        }

        .tab-btn.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }

        .tab-badge {
            font-size: 11px;
            padding: 1px 6px;
            border-radius: 9999px;
            background: var(--border-subtle);
            color: var(--text-muted);
        }

        .tab-btn.active .tab-badge {
            background: var(--primary-border);
            color: var(--primary);
        }

        /* Toolbar Panel */
        .toolbar-panel {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 14px 18px;
            margin-bottom: 16px;
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .toolbar-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 10px;
        }

        .btn-group {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 7px 14px;
            border-radius: var(--radius-md);
            font-size: 13px;
            font-weight: 500;
            border: 1px solid var(--border-color);
            background: var(--bg-card);
            color: var(--text-main);
            cursor: pointer;
            transition: all 0.15s ease;
            text-decoration: none;
        }

        .btn:hover {
            background: var(--bg-page);
            border-color: #cbd5e1;
        }

        .btn-primary {
            background: var(--primary);
            color: #ffffff;
            border-color: var(--primary);
            box-shadow: 0 1px 2px rgba(37, 99, 235, 0.2);
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            border-color: var(--primary-hover);
            color: #ffffff;
        }

        .btn-primary:disabled {
            background: #93c5fd;
            border-color: #93c5fd;
            cursor: not-allowed;
            box-shadow: none;
        }

        .btn-stop {
            color: var(--danger);
            border-color: var(--danger-border);
        }

        .btn-stop:hover:not(:disabled) {
            background: var(--danger-bg);
        }

        .btn-stop:disabled {
            opacity: 0.4;
            cursor: not-allowed;
        }

        .btn-loop.active {
            background: #faf5ff;
            color: #9333ea;
            border-color: #e9d5ff;
        }

        :root[data-theme="dark"] .btn-loop.active {
            background: rgba(147, 51, 234, 0.15);
            color: #c084fc;
            border-color: rgba(147, 51, 234, 0.35);
        }

        .toolbar-divider {
            height: 1px;
            background: var(--border-subtle);
        }

        .filters-group {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
            flex: 1;
        }

        .search-box {
            position: relative;
            flex: 1;
            min-width: 200px;
            max-width: 300px;
        }

        .search-box i {
            position: absolute;
            left: 11px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-light);
            font-size: 12.5px;
        }

        .search-input {
            width: 100%;
            padding: 7px 12px 7px 32px;
            font-size: 13px;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            outline: none;
            background: var(--bg-card);
            color: var(--text-main);
            transition: all 0.15s;
        }

        .search-input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.08);
        }

        .search-input::placeholder {
            color: var(--text-light);
        }

        .select-ctl {
            padding: 7px 11px;
            font-size: 13px;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            background: var(--bg-card);
            color: var(--text-main);
            outline: none;
            cursor: pointer;
            transition: border-color 0.15s;
        }

        .select-ctl:focus {
            border-color: var(--primary);
        }

        .toggle-grouping {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12.5px;
            color: var(--text-muted);
            cursor: pointer;
            user-select: none;
            padding: 6px 10px;
            border-radius: var(--radius-md);
            border: 1px solid transparent;
            transition: all 0.15s;
        }

        .toggle-grouping:hover {
            background: var(--bg-page);
            border-color: var(--border-color);
        }

        .toggle-grouping input {
            cursor: pointer;
            accent-color: var(--primary);
        }

        .view-switch {
            display: flex;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 2px;
            background: var(--bg-page);
        }

        .view-btn {
            border: none;
            background: transparent;
            padding: 5px 12px;
            border-radius: 6px;
            font-size: 12.5px;
            color: var(--text-muted);
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 5px;
            transition: all 0.15s;
        }

        .view-btn.active {
            background: var(--bg-card);
            color: var(--text-main);
            font-weight: 600;
            box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
        }

        
        .filters-grid-2col {
            display: contents;
        }

        .filters-sub-row {
            display: contents;
        }

        .table-sub-meta {
            display: none;
        }

        .table-name-wrap {
            font-weight: 500;
        }

        .mobile-action-bar {
            display: none;
        }

        /* Metric Highlights */
        .metric-row {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 12px;
            margin-bottom: 20px;
        }

        .metric-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 12px 16px;
            box-shadow: var(--shadow-card);
        }

        .metric-label {
            font-size: 11.5px;
            font-weight: 500;
            color: var(--text-muted);
            margin-bottom: 2px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .metric-val {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-main);
            font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
        }

        .metric-sub {
            font-size: 11px;
            color: var(--text-light);
            margin-top: 2px;
        }

        /* Region Group Section */
        .group-section {
            margin-bottom: 24px;
        }

        .group-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 12px;
            padding-bottom: 6px;
            border-bottom: 1px solid var(--border-color);
        }

        .group-title {
            font-size: 14.5px;
            font-weight: 600;
            color: var(--text-main);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .group-badge {
            font-size: 12px;
            color: var(--text-muted);
            font-weight: 400;
        }

        /* Cards Layout */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 12px;
        }

        .node-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 14px 16px;
            box-shadow: var(--shadow-card);
            transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            position: relative;
        }

        .node-card:hover {
            border-color: #cbd5e1;
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        :root[data-theme="dark"] .node-card:hover {
            border-color: #3b82f6;
        }

        .card-top {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 10px;
            margin-bottom: 8px;
        }

        .card-title-wrap {
            flex: 1;
        }

        .card-title {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-main);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .rank-tag {
            font-size: 10px;
            font-weight: 700;
            padding: 1px 5px;
            border-radius: 4px;
            background: #f1f5f9;
            color: #475569;
            font-family: ui-monospace, SFMono-Regular, monospace;
        }

        .rank-gold {
            background: #fef08a;
            color: #854d0e;
        }
        .rank-silver {
            background: #e2e8f0;
            color: #334155;
        }
        .rank-bronze {
            background: #fed7aa;
            color: #9a3412;
        }

        .card-meta {
            font-size: 11.5px;
            color: var(--text-muted);
            margin-top: 3px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .code-badge {
            font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
            background: var(--bg-page);
            padding: 1px 5px;
            border-radius: 4px;
            border: 1px solid var(--border-subtle);
            font-size: 11px;
            color: var(--text-muted);
        }

        .reping-btn {
            width: 26px;
            height: 26px;
            border: 1px solid var(--border-color);
            background: var(--bg-card);
            color: var(--text-muted);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 11px;
            cursor: pointer;
            transition: all 0.15s;
        }

        .reping-btn:hover {
            background: var(--bg-page);
            color: var(--text-main);
            border-color: #94a3b8;
        }

        .card-main {
            display: flex;
            align-items: baseline;
            justify-content: space-between;
            margin: 8px 0 6px;
        }

        .ping-val {
            font-size: 26px;
            font-weight: 700;
            font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
            display: flex;
            align-items: baseline;
            gap: 2px;
            color: #64748b;
        }

        .ping-val .unit {
            font-size: 12px;
            font-weight: 500;
            color: var(--text-light);
        }

        .status-badge {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 11px;
            font-weight: 500;
            padding: 2px 8px;
            border-radius: 9999px;
            background: var(--bg-page);
            color: var(--text-muted);
            border: 1px solid transparent;
        }

        .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: #94a3b8;
        }

        /* Latency Progress Bar Indicator */
        .latency-bar-track {
            height: 3px;
            background: var(--border-subtle);
            border-radius: 2px;
            overflow: hidden;
            margin-bottom: 10px;
        }

        .latency-bar-fill {
            height: 100%;
            width: 0%;
            border-radius: 2px;
            background: #cbd5e1;
            transition: width 0.3s ease, background 0.3s ease;
        }

        /* Color States */
        .c-fast { color: #15803d !important; }
        .bg-fast { background: var(--success-bg) !important; color: var(--success) !important; border-color: var(--success-border) !important; }
        .dot-fast { background: var(--success) !important; }

        .c-good { color: #0d9488 !important; }
        .bg-good { background: rgba(13, 148, 136, 0.12) !important; color: #0d9488 !important; border-color: rgba(13, 148, 136, 0.28) !important; }
        .dot-good { background: #0d9488 !important; }

        .c-warn { color: #b45309 !important; }
        .bg-warn { background: var(--warning-bg) !important; color: var(--warning) !important; border-color: var(--warning-border) !important; }
        .dot-warn { background: var(--warning) !important; }

        .c-slow { color: #c2410c !important; }
        .bg-slow { background: rgba(194, 65, 12, 0.12) !important; color: #ea580c !important; border-color: rgba(194, 65, 12, 0.28) !important; }
        .dot-slow { background: #ea580c !important; }

        .c-offline { color: #b91c1c !important; font-size: 16px !important; }
        .bg-offline { background: var(--danger-bg) !important; color: var(--danger) !important; border-color: var(--danger-border) !important; }
        .dot-offline { background: var(--danger) !important; }

        .dot-testing { background: var(--primary) !important; animation: pulse 0.8s infinite alternate; }

        @keyframes pulse {
            0% { opacity: 0.4; transform: scale(0.85); }
            100% { opacity: 1; transform: scale(1.25); }
        }

        .card-stats {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 4px;
            padding-top: 8px;
            border-top: 1px solid var(--border-subtle);
        }

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

        .stat-title {
            font-size: 10px;
            color: var(--text-light);
        }

        .stat-num {
            font-size: 11.5px;
            font-weight: 600;
            color: var(--text-muted);
            font-family: ui-monospace, SFMono-Regular, monospace;
        }

        /* Table View */
        .table-wrap {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow-x: auto;
            box-shadow: var(--shadow-card);
        }

        table.node-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 13px;
            text-align: left;
        }

        table.node-table th {
            background: var(--bg-page);
            padding: 9px 12px;
            font-weight: 600;
            color: var(--text-muted);
            border-bottom: 1px solid var(--border-color);
            white-space: nowrap;
            user-select: none;
            cursor: pointer;
            transition: background 0.15s, color 0.15s;
        }

        table.node-table th:hover {
            background: var(--border-subtle);
            color: var(--text-main);
        }

        table.node-table th.sorted {
            color: var(--primary);
            background: var(--primary-light);
        }

        table.node-table th .sort-icon {
            font-size: 10px;
            margin-left: 4px;
            opacity: 0.6;
        }

        table.node-table th.sorted .sort-icon {
            opacity: 1;
            color: var(--primary);
        }

        table.node-table td {
            padding: 9px 12px;
            border-bottom: 1px solid var(--border-subtle);
            color: var(--text-main);
            white-space: nowrap;
        }

        table.node-table tr:hover td {
            background: var(--bg-page);
        }

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

        .td-mono {
            font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
            font-size: 12.5px;
        }

        /* Toast Feedback */
        .toast-box {
            position: fixed;
            bottom: 24px;
            right: 24px;
            background: #0f172a;
            color: #ffffff;
            padding: 9px 16px;
            border-radius: var(--radius-md);
            font-size: 13px;
            display: flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.2);
            z-index: 1000;
            transform: translateY(60px);
            opacity: 0;
            transition: all 0.2s ease;
        }

        .toast-box.show {
            transform: translateY(0);
            opacity: 1;
        }

        /* Footer */
        .site-footer {
            margin-top: 40px;
            padding: 24px 0 30px;
            border-top: 1px solid var(--border-color);
            text-align: center;
            color: var(--text-light);
            font-size: 12px;
        }

        .site-footer a {
            color: var(--text-muted);
            text-decoration: none;
        }

        .site-footer a:hover {
            color: var(--primary);
            text-decoration: underline;
        }

        /* Mobile & Tablet Responsive Design */
        @media (max-width: 992px) {
            .header-inner {
                padding: 12px 18px;
            }
            .main-container {
                padding: 16px 18px 70px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --safe-bottom: env(safe-area-inset-bottom, 0px);
            }

            body {
                -webkit-tap-highlight-color: transparent;
                padding-bottom: calc(30px + var(--safe-bottom));
            }

            button, select, input {
                touch-action: manipulation;
            }

            .btn:active, .tab-btn:active, .reping-btn:active, .header-action-btn:active {
                transform: scale(0.96);
            }

            /* Header Grid on Mobile */
            .header-inner {
                padding: 10px 14px;
                display: grid;
                grid-template-columns: 1fr auto;
                grid-template-areas: 
                    "brand actions"
                    "diag diag";
                gap: 8px 10px;
            }

            .brand-wrap {
                grid-area: brand;
                gap: 10px;
            }

            .brand-logo {
                width: 32px;
                height: 32px;
            }

            .brand-title {
                font-size: 15.5px;
            }

            .brand-subtitle {
                font-size: 11px;
            }

            .header-right {
                display: contents;
            }

            .header-actions {
                grid-area: actions;
                display: flex;
                align-items: center;
                gap: 6px;
            }

            .header-action-btn {
                padding: 5px 9px;
                font-size: 12px;
            }

            .diag-pill {
                grid-area: diag;
                width: 100%;
                padding: 5px 10px;
                font-size: 11px;
                gap: 8px;
                overflow-x: auto;
                scrollbar-width: none;
                -webkit-overflow-scrolling: touch;
                justify-content: space-between;
            }

            .diag-pill::-webkit-scrollbar {
                display: none;
            }

            .diag-divider {
                display: none;
            }

            /* Main Container */
            .main-container {
                padding: 12px 12px 80px;
            }

            /* Tabs Nav */
            .tabs-nav {
                padding: 4px;
                margin-bottom: 12px;
                border-radius: var(--radius-md);
                scrollbar-width: none;
                -webkit-overflow-scrolling: touch;
            }

            .tabs-nav::-webkit-scrollbar {
                display: none;
            }

            .tab-btn {
                padding: 6px 11px;
                font-size: 13px;
                border-radius: 8px;
            }

            .tab-badge {
                font-size: 10px;
                padding: 1px 5px;
            }

            /* Toolbar on Mobile */
            .toolbar-panel {
                padding: 12px 12px;
                margin-bottom: 12px;
                gap: 10px;
            }

            .toolbar-row {
                flex-direction: column;
                align-items: stretch;
                gap: 8px;
            }

            .btn-group-actions {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 7px;
                width: 100%;
            }

            .btn-group-actions .btn-primary {
                grid-column: 1 / -1;
                min-height: 44px;
                font-size: 14.5px;
                font-weight: 600;
                justify-content: center;
            }

            .btn-group-actions .btn {
                min-height: 38px;
                font-size: 12px;
                justify-content: center;
                padding: 6px 8px;
            }

            .btn-group-export {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 7px;
                width: 100%;
            }

            .btn-group-export .btn {
                min-height: 36px;
                font-size: 12px;
                justify-content: center;
                padding: 6px 8px;
            }

            /* Filters */
            .filters-group {
                display: flex;
                flex-direction: column;
                gap: 8px;
                width: 100%;
            }

            .search-box {
                width: 100%;
                max-width: none;
            }

            .search-input {
                font-size: 16px !important; /* Prevents iOS auto zoom */
                height: 40px;
                padding: 8px 12px 8px 34px;
            }

            .filters-grid-2col {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 7px;
                width: 100%;
            }

            .select-ctl {
                font-size: 16px !important; /* Prevents iOS auto zoom */
                height: 40px;
                width: 100%;
            }

            .filters-sub-row {
                display: flex;
                align-items: center;
                justify-content: space-between;
                width: 100%;
                gap: 8px;
            }

            .toggle-grouping {
                padding: 8px 10px;
                font-size: 12px;
                background: var(--bg-page);
                border-radius: var(--radius-md);
            }

            .view-switch {
                width: 100%;
                display: grid;
                grid-template-columns: 1fr 1fr;
                padding: 3px;
            }

            .view-btn {
                justify-content: center;
                padding: 7px;
            }

            /* Metrics Row on Mobile */
            .metric-row {
                grid-template-columns: 1fr 1fr;
                gap: 7px;
                margin-bottom: 14px;
            }

            .metric-card {
                padding: 10px 12px;
                border-radius: var(--radius-md);
            }

            .metric-card-best {
                grid-column: 1 / -1;
                background: linear-gradient(135deg, var(--bg-card), var(--primary-light));
            }

            .metric-label {
                font-size: 11px;
            }

            .metric-val {
                font-size: 18px;
            }

            .metric-sub {
                font-size: 10.5px;
            }

            /* Cards on Mobile */
            .cards-grid {
                grid-template-columns: 1fr;
                gap: 9px;
            }

            .node-card {
                padding: 12px 13px;
                border-radius: var(--radius-md);
            }

            .card-title {
                font-size: 13.5px;
            }

            .reping-btn {
                width: 32px;
                height: 32px;
                font-size: 12px;
            }

            .ping-val {
                font-size: 23px;
            }

            .card-stats {
                padding-top: 8px;
                gap: 2px;
            }

            .stat-title {
                font-size: 9.5px;
            }

            .stat-num {
                font-size: 11.5px;
            }

            /* Table on Mobile */
            .table-wrap {
                border-radius: var(--radius-md);
                -webkit-overflow-scrolling: touch;
            }

            table.node-table th, table.node-table td {
                padding: 8px 9px;
                font-size: 12px;
            }

            .table-sub-meta {
                display: block;
                font-size: 10.5px;
                color: var(--text-light);
                font-family: ui-monospace, SFMono-Regular, monospace;
                margin-top: 1px;
            }

            .col-code, .col-group, .col-round, .col-max {
                display: none !important;
            }

            /* Floating Mobile Action Bar */
            .mobile-action-bar {
                display: flex;
                align-items: center;
                justify-content: space-between;
                position: fixed;
                bottom: calc(12px + var(--safe-bottom));
                left: 12px;
                right: 12px;
                background: var(--bg-card);
                border: 1px solid var(--border-color);
                border-radius: 9999px;
                padding: 6px 8px 6px 14px;
                box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.2), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
                z-index: 999;
                transform: translateY(120px);
                opacity: 0;
                pointer-events: none;
                transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.25s ease;
                gap: 8px;
            }

            .mobile-action-bar.visible {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }

            .mob-status-wrap {
                display: flex;
                align-items: center;
                gap: 7px;
                flex: 1;
                min-width: 0;
                font-size: 12px;
                color: var(--text-muted);
                overflow: hidden;
                text-overflow: ellipsis;
                white-space: nowrap;
                cursor: pointer;
            }

            .mob-status-wrap strong {
                color: var(--text-main);
                font-family: ui-monospace, SFMono-Regular, monospace;
            }

            .mob-actions {
                display: flex;
                align-items: center;
                gap: 6px;
                flex-shrink: 0;
            }

            .mob-btn {
                padding: 7px 15px;
                border-radius: 9999px;
                font-size: 13px;
                font-weight: 600;
                border: none;
                cursor: pointer;
                display: inline-flex;
                align-items: center;
                gap: 5px;
                transition: transform 0.1s;
            }

            .mob-btn:active {
                transform: scale(0.95);
            }

            .mob-btn-start {
                background: var(--primary);
                color: #ffffff;
            }

            .mob-btn-stop {
                background: var(--danger);
                color: #ffffff;
            }

            .mob-btn-top {
                width: 32px;
                height: 32px;
                border-radius: 50%;
                background: var(--bg-page);
                border: 1px solid var(--border-color);
                color: var(--text-muted);
                display: flex;
                align-items: center;
                justify-content: center;
                font-size: 12px;
                cursor: pointer;
            }
        }
/* ==========================================================================
   Homepage Cards Grid & Minimal Hero
   ========================================================================== */
.home-hero {
    text-align: center;
    padding: 36px 16px 28px;
    max-width: 820px;
    margin: 0 auto;
}

.home-hero-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-main);
    letter-spacing: -0.02em;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.home-hero-title .badge-tag {
    font-size: 13px;
    font-weight: 600;
    padding: 3px 10px;
    background: var(--primary-light);
    color: var(--primary);
    border: 1px solid var(--primary-border);
    border-radius: 9999px;
}

.home-hero-subtitle {
    font-size: 14.5px;
    color: var(--text-muted);
    line-height: 1.6;
    max-width: 620px;
    margin: 0 auto;
}

.home-providers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 18px;
    padding: 10px 0 40px;
}

.provider-card-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.provider-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 22px 20px;
    box-shadow: var(--shadow-card);
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
}

.provider-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary);
}

.provider-card:active {
    transform: translateY(-1px);
}

.provider-card-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
}

.provider-card-icon-wrap {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    transition: transform 0.2s ease;
}

.provider-card:hover .provider-card-icon-wrap {
    transform: scale(1.08);
}

.provider-card-badge {
    font-size: 12px;
    font-weight: 600;
    padding: 3px 9px;
    border-radius: 9999px;
    background: var(--bg-page);
    color: var(--text-muted);
    border: 1px solid var(--border-color);
    font-variant-numeric: tabular-nums;
}

.provider-card-name {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.provider-card-enname {
    font-size: 12.5px;
    font-weight: 500;
    color: var(--text-light);
    margin-bottom: 10px;
}

.provider-card-desc {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.5;
    margin-bottom: 16px;
    flex-grow: 1;
}

.provider-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 12px;
    border-top: 1px solid var(--border-subtle);
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
}

.provider-card-footer i {
    transition: transform 0.2s ease;
}

.provider-card:hover .provider-card-footer i {
    transform: translateX(4px);
}

/* Subpage Top Bar */
.subpage-nav-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.btn-back {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: var(--radius-md);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    font-size: 13.5px;
    font-weight: 600;
    text-decoration: none;
    box-shadow: var(--shadow-card);
    transition: all 0.15s ease;
}

.btn-back:hover {
    background: var(--primary-light);
    color: var(--primary);
    border-color: var(--primary-border);
}

.btn-back i {
    font-size: 12px;
    transition: transform 0.15s ease;
}

.btn-back:hover i {
    transform: translateX(-3px);
}

.subpage-provider-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.subpage-provider-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
}

.subpage-provider-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-main);
}

.subpage-provider-badge {
    font-size: 12px;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 9999px;
    background: var(--primary-light);
    color: var(--primary);
    border: 1px solid var(--primary-border);
}

@media (max-width: 640px) {
    .home-hero {
        padding: 24px 12px 18px;
    }
    .home-hero-title {
        font-size: 22px;
    }
    .home-providers-grid {
        grid-template-columns: 1fr;
        gap: 12px;
        padding-bottom: 24px;
    }
    .provider-card {
        padding: 16px 16px;
    }
}

/* Network Diagnostic Tip Banner */
.network-tip-banner {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 10px 14px;
    margin-bottom: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-left: 3px solid var(--primary);
    border-radius: var(--radius-md);
    font-size: 12.5px;
    line-height: 1.55;
    color: var(--text-muted);
}

.network-tip-banner .tip-icon {
    color: var(--primary);
    font-size: 14px;
    margin-top: 2px;
    flex-shrink: 0;
}

.network-tip-banner .tip-title {
    font-weight: 600;
    color: var(--text-main);
}