:root {
            --bg-main: #0b0f19;
            --bg-sidebar: #070a12;
            --bg-card: #111827;
            --bg-hover: #1f293d;
            --bg-user-msg: #1e293b;
            --bg-assistant-msg: transparent;
            --border-color: #1e293b;
            --border-hover: #334155;
            --text-primary: #f8fafc;
            --text-secondary: #94a3b8;
            --text-muted: #64748b;
            --accent-primary: #6366f1;
            --accent-glow: rgba(99, 102, 241, 0.25);
            --code-bg: #0f1422;
            --input-bg: #111827;
            --topbar-bg: rgba(11, 15, 25, 0.85);
        }

        [data-theme="dark"] {
            --bg-main: #0b0f19;
            --bg-sidebar: #070a12;
            --bg-card: #111827;
            --bg-hover: #1f293d;
            --bg-user-msg: #1e293b;
            --bg-assistant-msg: transparent;
            --border-color: #1e293b;
            --border-hover: #334155;
            --text-primary: #f8fafc;
            --text-secondary: #94a3b8;
            --text-muted: #64748b;
            --accent-primary: #6366f1;
            --accent-glow: rgba(99, 102, 241, 0.25);
            --code-bg: #0f1422;
            --input-bg: #111827;
            --topbar-bg: rgba(11, 15, 25, 0.85);
        }

        [data-theme="light"] {
            --bg-main: #ffffff;
            --bg-sidebar: #f1f5f9;
            --bg-card: #ffffff;
            --bg-hover: #e2e8f0;
            --bg-user-msg: #f1f5f9;
            --bg-assistant-msg: transparent;
            --border-color: #cbd5e1;
            --border-hover: #94a3b8;
            --text-primary: #0f172a;
            --text-secondary: #334155;
            --text-muted: #64748b;
            --accent-primary: #4f46e5;
            --accent-glow: rgba(79, 70, 229, 0.15);
            --code-bg: #f8fafc;
            --input-bg: #f8fafc;
            --topbar-bg: rgba(255, 255, 255, 0.95);
        }



        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            outline: none;
        }

        body {
            background-color: var(--bg-main);
            color: var(--text-primary);
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
            height: 100vh;
            display: flex;
            overflow: hidden;
            -webkit-font-smoothing: antialiased;
        }

        /* Sidebar Styling */
        .sidebar {
            width: 270px;
            background-color: var(--bg-sidebar);
            border-right: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            transition: transform 0.25s ease, width 0.25s ease;
            z-index: 50;
            flex-shrink: 0;
        }

        .sidebar.collapsed {
            transform: translateX(-100%);
            position: absolute;
            height: 100%;
        }

        .sidebar-header {
            padding: 16px 14px 12px 14px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            border-bottom: 1px solid var(--border-color);
        }

        .brand-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .brand-badge {
            display: flex;
            align-items: center;
            gap: 9px;
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.3px;
        }

        .brand-icon {
            width: 28px;
            height: 28px;
            border-radius: 8px;
            background: linear-gradient(135deg, #6366f1, #a855f7);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #ffffff;
            font-size: 13px;
            box-shadow: 0 0 12px var(--accent-glow);
        }

        .btn-new-chat {
            background: var(--bg-card);
            border: 1px solid var(--accent-primary);
            color: var(--accent-primary);
            font-weight: 600;
            font-size: 13.5px;
            border-radius: 10px;
            padding: 9px 14px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            transition: all 0.2s ease;
            width: 100%;
        }

        .btn-new-chat:hover {
            background: var(--accent-primary);
            color: #ffffff;
            border-color: var(--accent-primary);
            box-shadow: 0 4px 14px var(--accent-glow);
        }

        .history-list {
            flex: 1;
            overflow-y: auto;
            padding: 12px 8px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .history-list::-webkit-scrollbar {
            width: 5px;
        }

        .history-list::-webkit-scrollbar-thumb {
            background: #1e293b;
            border-radius: 4px;
        }

        .history-title {
            font-size: 11px;
            text-transform: uppercase;
            letter-spacing: 0.6px;
            color: var(--text-muted);
            padding: 6px 10px 4px 10px;
            font-weight: 600;
        }

        .history-item {
            padding: 8px 12px;
            border-radius: 8px;
            font-size: 13px;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            transition: all 0.15s ease;
            text-overflow: ellipsis;
            white-space: nowrap;
            overflow: hidden;
            position: relative;
        }

        .history-item:hover, .history-item.active {
            background-color: var(--bg-hover);
            color: var(--text-primary);
        }

        .history-item-label {
            display: flex;
            align-items: center;
            gap: 8px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            flex: 1;
        }

        .history-del-btn {
            opacity: 0;
            color: #94a3b8;
            font-size: 11px;
            padding: 2px 5px;
            border-radius: 4px;
            transition: opacity 0.2s;
            background: transparent;
            border: none;
            cursor: pointer;
            -webkit-tap-highlight-color: transparent;
            touch-action: manipulation;
        }

        .history-item:hover .history-del-btn,
        .history-item:focus-within .history-del-btn {
            opacity: 1;
        }

        /* Touch devices: always show delete/stop so buttons remain tappable */
        @media (hover: none) and (pointer: coarse) {
            .history-del-btn {
                opacity: 0.85;
            }
        }

        .history-del-btn:hover {
            color: #ef4444;
            background: rgba(239, 68, 68, 0.15);
        }

        .sidebar-footer {
            padding: 12px 14px;
            border-top: 1px solid var(--border-color);
            background: var(--bg-sidebar);
            display: flex;
            flex-direction: column;
            gap: 8px;
            font-size: 12px;
            color: var(--text-secondary);
        }

        .status-pill {
            display: flex;
            align-items: center;
            gap: 7px;
            color: #10b981;
            font-size: 12px;
            font-weight: 500;
        }

        .status-dot {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: #10b981;
            box-shadow: 0 0 8px #10b981;
        }

        /* Main Workspace */
        .main-workspace {
            flex: 1;
            display: flex;
            flex-direction: column;
            height: 100vh;
            overflow: hidden;
            position: relative;
            background-color: var(--bg-main);
        }

        /* Top Bar */
        .topbar {
            height: 58px;
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
            background: var(--topbar-bg);
            backdrop-filter: blur(12px);
            position: relative;
            z-index: 20;
            gap: 12px;
            flex-shrink: 0;
        }

        /* Sidebar backdrop: hidden by default (also outside mobile media query) */
        .sidebar-backdrop {
            display: none;
            pointer-events: none;
        }

        /* Dynamic overlays (Live Terminal / Git Diff) — previously missing CSS */
        .workspace-modal-overlay {
            position: fixed;
            inset: 0;
            width: 100vw;
            height: 100vh;
            background: rgba(10, 15, 29, 0.82);
            backdrop-filter: blur(8px);
            z-index: 9999;
            display: none;
            align-items: center;
            justify-content: center;
            padding: 16px;
        }
        .workspace-modal-card {
            background: #0f172a;
            border: 1px solid #1e293b;
            border-radius: 16px;
            width: 100%;
            max-width: 580px;
            max-height: 90vh;
            overflow: auto;
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
            padding: 16px;
        }
        .workspace-modal-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            margin-bottom: 12px;
        }
        .workspace-modal-header h3 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0;
        }
        .btn-close-modal {
            background: transparent;
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            width: 34px;
            height: 34px;
            border-radius: 8px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            touch-action: manipulation;
        }

        .topbar-left {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 1;
            min-width: 0;
        }

        .btn-icon {
            background: transparent;
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            width: 34px;
            height: 34px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.2s;
            flex-shrink: 0;
        }

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

        .model-picker-wrap {
            position: relative;
            max-width: 280px;
            flex-shrink: 1;
            min-width: 0;
        }

        .model-select {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            font-size: 13px;
            font-weight: 500;
            padding: 6px 14px;
            border-radius: 10px;
            cursor: pointer;
            transition: all 0.2s;
            appearance: none;
            -webkit-appearance: none;
            padding-right: 30px;
            max-width: 280px;
            text-overflow: ellipsis;
            white-space: nowrap;
            overflow: hidden;
            width: 100%;
        }

        .model-select:hover, .model-select:focus {
            border-color: var(--accent-primary);
            box-shadow: 0 0 0 2px var(--accent-glow);
        }

        .model-select-arrow {
            position: absolute;
            right: 12px;
            top: 50%;
            transform: translateY(-50%);
            pointer-events: none;
            font-size: 11px;
            color: var(--text-muted);
        }

        .topbar-right {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .token-tracker-chip {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            padding: 5px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 7px;
            color: var(--text-secondary);
        }

        .token-tracker-chip b {
            color: var(--accent-primary);
            font-family: 'JetBrains Mono', monospace;
        }

        .mode-switcher-wrap {
            display: flex;
            background: var(--bg-sidebar);
            border: 1px solid var(--border-color);
            border-radius: 10px;
            padding: 3px;
            gap: 4px;
        }

        .btn-mode {
            background: transparent;
            border: none;
            color: var(--text-secondary);
            font-size: 12.5px;
            font-weight: 500;
            padding: 5px 12px;
            border-radius: 7px;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 6px;
            transition: all 0.2s ease;
        }

        .btn-mode:hover {
            color: var(--text-primary);
        }

        .btn-mode.active {
            background: var(--bg-hover);
            color: var(--text-primary);
            font-weight: 600;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
        }

        .btn-mode.coding-active {
            background: var(--accent-glow);
            border: 1px solid var(--accent-primary);
            color: var(--accent-primary);
        }

        .workspace-chip {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            padding: 5px 11px;
            border-radius: 9px;
            font-size: 11.5px;
            font-family: 'JetBrains Mono', monospace;
            display: flex;
            align-items: center;
            gap: 6px;
            cursor: pointer;
            transition: all 0.2s ease;
        }

        .workspace-chip:hover {
            border-color: var(--border-hover);
            color: var(--text-primary);
            background: var(--bg-hover);
        }

        .workspace-chip.local {
            background: rgba(16, 185, 129, 0.12);
            border: 1px solid rgba(16, 185, 129, 0.45);
            color: #6ee7b7;
        }

        .workspace-chip.local:hover {
            border-color: #10b981;
            background: rgba(16, 185, 129, 0.22);
            color: #a7f3d0;
        }

        .pulse-dot-green {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: #10b981;
            box-shadow: 0 0 8px #10b981;
            display: inline-block;
        }

        .pulse-dot-blue {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: #6366f1;
            box-shadow: 0 0 8px #6366f1;
            display: inline-block;
        }

        /* Workspace Modal Styles */
        .ws-modal-backdrop {
            position: fixed;
            top: 0;
            left: 0;
            width: 100vw;
            height: 100vh;
            background: rgba(10, 15, 29, 0.82);
            backdrop-filter: blur(8px);
            z-index: 9999;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }

        .ws-modal-box {
            background: #0f172a;
            border: 1px solid #1e293b;
            border-radius: 16px;
            width: 100%;
            max-width: 580px;
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
            overflow: hidden;
            animation: wsFadeIn 0.2s ease-out;
        }

        @keyframes wsFadeIn {
            from { opacity: 0; transform: scale(0.96); }
            to { opacity: 1; transform: scale(1); }
        }

        .ws-modal-header {
            padding: 18px 22px;
            border-bottom: 1px solid #1e293b;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .ws-modal-title {
            font-size: 16px;
            font-weight: 600;
            color: #f8fafc;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .ws-modal-close {
            background: transparent;
            border: none;
            color: #94a3b8;
            font-size: 18px;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 6px;
            transition: all 0.2s;
        }

        .ws-modal-close:hover {
            color: #f8fafc;
            background: #1e293b;
        }

        .ws-modal-body {
            padding: 22px;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .ws-choice-card {
            background: #131d33;
            border: 1px solid #1e293b;
            border-radius: 12px;
            padding: 16px;
            cursor: pointer;
            transition: all 0.2s ease;
        }

        .ws-choice-card:hover {
            border-color: #3b82f6;
            background: #162442;
        }

        .ws-choice-card.active {
            border-color: #10b981;
            background: rgba(16, 185, 129, 0.08);
            box-shadow: 0 0 16px rgba(16, 185, 129, 0.12);
        }

        .ws-choice-card.active.vps-active {
            border-color: #6366f1;
            background: rgba(99, 102, 241, 0.08);
            box-shadow: 0 0 16px rgba(99, 102, 241, 0.12);
        }

        .ws-card-header {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            margin-bottom: 12px;
        }

        .ws-card-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex-shrink: 0;
        }

        .ws-card-icon.local {
            background: rgba(16, 185, 129, 0.15);
            color: #34d399;
        }

        .ws-card-icon.vps {
            background: rgba(99, 102, 241, 0.15);
            color: #818cf8;
        }

        .ws-card-title-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 4px;
        }

        .ws-card-title {
            font-size: 14.5px;
            font-weight: 600;
            color: #f1f5f9;
        }

        .ws-badge {
            font-size: 11px;
            padding: 2px 8px;
            border-radius: 6px;
            font-weight: 500;
        }

        .ws-badge.recommended {
            background: rgba(16, 185, 129, 0.2);
            color: #6ee7b7;
            border: 1px solid rgba(16, 185, 129, 0.3);
        }

        .ws-badge.vps {
            background: rgba(99, 102, 241, 0.2);
            color: #a5b4fc;
            border: 1px solid rgba(99, 102, 241, 0.3);
        }

        .ws-card-desc {
            font-size: 12px;
            color: #94a3b8;
            line-height: 1.5;
            margin: 0;
        }

        .ws-card-action {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 12px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            gap: 10px;
        }

        .ws-status-text {
            font-size: 12px;
            color: #cbd5e1;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            font-family: 'JetBrains Mono', monospace;
        }

        .btn-ws-action {
            background: #2563eb;
            color: #ffffff;
            border: none;
            border-radius: 8px;
            padding: 7px 14px;
            font-size: 12px;
            font-weight: 500;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: all 0.2s;
            white-space: nowrap;
        }

        .btn-ws-action:hover {
            background: #1d4ed8;
        }

        .btn-ws-action.btn-emerald {
            background: #059669;
        }

        .btn-ws-action.btn-emerald:hover {
            background: #047857;
        }

        .ws-input-vps {
            flex: 1;
            background: #0a0f1d;
            border: 1px solid #1e293b;
            border-radius: 7px;
            color: #f1f5f9;
            padding: 6px 10px;
            font-size: 12px;
            font-family: 'JetBrains Mono', monospace;
        }

        .ws-input-vps:focus {
            outline: none;
            border-color: #6366f1;
        }

        .agent-ws-banner {
            background: rgba(99, 102, 241, 0.08);
            border: 1px solid rgba(99, 102, 241, 0.25);
            padding: 8px 12px;
            border-radius: 10px;
            font-size: 12px;
            color: #c7d2fe;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
        }

        .agent-ws-banner code {
            background: rgba(0, 0, 0, 0.3);
            padding: 2px 6px;
            border-radius: 4px;
            font-family: 'JetBrains Mono', monospace;
            color: #38bdf8;
            margin-left: 6px;
        }

        .tool-call-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 10px;
            margin-bottom: 8px;
            overflow: hidden;
            font-size: 12.5px;
            transition: all 0.2s;
        }

        .tool-call-card.running {
            border-color: rgba(99, 102, 241, 0.5);
            box-shadow: 0 0 12px rgba(99, 102, 241, 0.15);
        }

        .tool-call-card.finished {
            border-color: var(--border-color);
        }

        .tool-call-header {
            padding: 8px 12px;
            display: flex;
            align-items: center;
            gap: 8px;
            cursor: pointer;
            user-select: none;
        }

        .tool-call-header:hover {
            background: var(--bg-hover);
        }

        .tool-call-name {
            font-weight: 500;
            color: var(--text-primary);
            font-family: 'JetBrains Mono', monospace;
            font-size: 12px;
        }

        .tool-badge {
            font-size: 10px;
            padding: 2px 7px;
            border-radius: 12px;
            background: rgba(245, 158, 11, 0.15);
            color: #fbbf24;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .tool-badge.success {
            background: rgba(16, 185, 129, 0.15);
            color: #10b981;
        }

        .tool-call-body {
            padding: 8px 12px;
            border-top: 1px solid var(--border-color);
            background: var(--code-bg);
        }

        .tool-call-output {
            margin: 0;
            font-family: 'JetBrains Mono', monospace;
            font-size: 11px;
            color: var(--text-secondary);
            max-height: 220px;
            overflow-y: auto;
            white-space: pre-wrap;
            word-break: break-all;
        }

        /* Chat Canvas */
        .chat-canvas {
            flex: 1;
            overflow-y: auto;
            display: flex;
            flex-direction: column;
            scroll-behavior: smooth;
        }

        .chat-canvas::-webkit-scrollbar {
            width: 6px;
        }

        .chat-canvas::-webkit-scrollbar-thumb {
            background: #1e293b;
            border-radius: 3px;
        }

        .chat-inner {
            width: 100%;
            max-width: 820px;
            margin: 0 auto;
            padding: 24px 20px 140px 20px;
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        /* Welcome Hero Screen */
        .welcome-hero {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            min-height: calc(100vh - 280px);
            margin: 0 auto;
            text-align: center;
            animation: fadeIn 0.4s ease-out;
        }

        .hero-logo-box {
            width: 64px;
            height: 64px;
            border-radius: 20px;
            background: linear-gradient(135deg, #4f46e5, #9333ea);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            color: white;
            box-shadow: 0 10px 30px rgba(99, 102, 241, 0.35);
            margin-bottom: 20px;
        }

        .hero-title {
            font-size: 26px;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 8px;
            letter-spacing: -0.5px;
        }

        .hero-subtitle {
            font-size: 14.5px;
            color: var(--text-secondary);
            max-width: 500px;
            line-height: 1.5;
            margin-bottom: 30px;
        }

        .suggestion-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 12px;
            width: 100%;
            max-width: 680px;
        }

        @media (max-width: 640px) {
            .suggestion-grid {
                grid-template-columns: 1fr;
            }
        }

        .suggestion-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            padding: 14px 16px;
            border-radius: 12px;
            cursor: pointer;
            text-align: left;
            transition: all 0.2s ease;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .suggestion-card:hover {
            border-color: #6366f1;
            background: #172033;
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(0, 0, 0, 0.25);
        }

        .suggestion-card-title {
            font-size: 13.5px;
            font-weight: 600;
            color: #f1f5f9;
            display: flex;
            align-items: center;
            gap: 7px;
        }

        .suggestion-card-desc {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* Message Rows */
        .msg-row {
            display: flex;
            gap: 16px;
            width: 100%;
            animation: fadeIn 0.25s ease-out;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(6px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .msg-row.user {
            justify-content: flex-end;
        }

        .msg-avatar {
            width: 32px;
            height: 32px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 13px;
        }

        .msg-avatar.ai {
            background: linear-gradient(135deg, #6366f1, #8b5cf6);
            color: white;
            box-shadow: 0 2px 10px rgba(99, 102, 241, 0.3);
        }

        .msg-avatar.user {
            background: #334155;
            color: #e2e8f0;
        }

        .msg-body-wrapper {
            max-width: calc(100% - 48px);
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        /* User Message Bubble */
        .msg-row.user .msg-content {
            background-color: var(--bg-user-msg);
            color: var(--text-primary);
            padding: 12px 18px;
            border-radius: 18px;
            border-bottom-right-radius: 4px;
            font-size: 14.5px;
            line-height: 1.6;
            border: 1px solid var(--border-hover);
            word-break: break-word;
        }

        /* Assistant Message */
        .msg-row.bot .msg-content {
            color: var(--text-primary);
            font-size: 14.5px;
            line-height: 1.7;
            padding-top: 3px;
            word-break: break-word;
        }

        /* Markdown Elements Inside Assistant Message */
        .msg-content p {
            margin-bottom: 12px;
            color: var(--text-primary);
        }
        .msg-content p:last-child {
            margin-bottom: 0;
        }
        .msg-content h1, .msg-content h2, .msg-content h3, .msg-content h4 {
            color: var(--text-primary);
            margin-top: 16px;
            margin-bottom: 8px;
            font-weight: 600;
        }
        .msg-content h1 { font-size: 20px; }
        .msg-content h2 { font-size: 18px; }
        .msg-content h3 { font-size: 16px; }

        .msg-content ul, .msg-content ol {
            margin-left: 20px;
            margin-bottom: 12px;
            color: var(--text-primary);
        }
        .msg-content li {
            margin-bottom: 4px;
            color: var(--text-primary);
        }
        .msg-content strong, .msg-content b {
            color: var(--text-primary);
            font-weight: 600;
        }
        .msg-content blockquote {
            border-left: 3px solid var(--accent-primary);
            padding-left: 12px;
            margin: 12px 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        /* Markdown Tables */
        .msg-content .table-responsive {
            width: 100%;
            overflow-x: auto;
            margin: 16px 0;
            border-radius: 10px;
            border: 1px solid var(--border-color);
            background: var(--bg-card);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
        }

        .msg-content table {
            width: 100%;
            border-collapse: collapse;
            font-size: 13.5px;
            text-align: left;
            line-height: 1.6;
            color: var(--text-primary);
        }

        .msg-content th {
            background: var(--bg-hover);
            color: var(--text-primary);
            font-weight: 600;
            padding: 10px 14px;
            border-bottom: 2px solid var(--border-color);
            white-space: nowrap;
        }

        .msg-content td {
            padding: 10px 14px;
            border-bottom: 1px solid var(--border-color);
            color: var(--text-primary);
            vertical-align: top;
        }

        .msg-content tr:last-child td {
            border-bottom: none;
        }

        .msg-content tr:nth-child(even) td {
            background: var(--bg-sidebar);
        }

        .msg-content tr:hover td {
            background: var(--bg-hover);
        }

        .msg-content hr {
            border: 0;
            height: 1px;
            background: linear-gradient(to right, var(--accent-glow), var(--border-color), transparent);
            margin: 20px 0;
        }

        .msg-content code:not(pre code) {
            background: var(--bg-hover);
            color: var(--accent-primary);
            padding: 2px 6px;
            border-radius: 5px;
            font-family: 'JetBrains Mono', monospace;
            font-size: 12.5px;
            border: 1px solid var(--border-color);
            word-break: break-word;
        }

        /* Code Blocks */
        .code-container {
            margin: 14px 0;
            background: var(--code-bg);
            border: 1px solid var(--border-color);
            border-radius: 10px;
            overflow: hidden;
        }
        .code-header {
            background: var(--bg-hover);
            padding: 6px 14px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 11.5px;
            color: var(--text-secondary);
            font-family: 'JetBrains Mono', monospace;
            border-bottom: 1px solid var(--border-color);
        }
        .btn-copy-code {
            background: transparent;
            border: none;
            color: var(--text-secondary);
            cursor: pointer;
            font-size: 11.5px;
            display: flex;
            align-items: center;
            gap: 5px;
            padding: 3px 6px;
            border-radius: 4px;
            transition: all 0.15s;
        }
        .btn-copy-code:hover {
            color: var(--text-primary);
            background: var(--bg-hover);
        }
        .code-container pre {
            margin: 0;
            padding: 14px;
            overflow-x: auto;
        }
        .code-container code {
            font-family: 'JetBrains Mono', monospace;
            font-size: 13px;
            line-height: 1.5;
            background: transparent !important;
            padding: 0 !important;
            color: var(--text-primary);
        }

        /* Assistant Footer Metadata */
        .bot-meta-bar {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-top: 8px;
            font-size: 11.5px;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        .meta-pill {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            padding: 2px 8px;
            border-radius: 6px;
            display: inline-flex;
            align-items: center;
            gap: 5px;
            color: var(--text-secondary);
        }
        .meta-pill i {
            color: var(--accent-primary);
        }
        .meta-actions {
            display: flex;
            gap: 6px;
            margin-left: auto;
        }
        .btn-meta-action {
            background: transparent;
            border: none;
            color: var(--text-muted);
            cursor: pointer;
            padding: 3px 6px;
            border-radius: 4px;
            font-size: 12px;
            transition: color 0.15s;
        }
        .btn-meta-action:hover {
            color: var(--text-primary);
            background: var(--bg-hover);
        }

        /* Thinking / Loading Indicator */
        .thinking-bubble {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 12px;
            border-radius: 12px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            font-size: 13px;
            color: var(--text-secondary);
            width: fit-content;
        }
        .pulse-dots {
            display: flex;
            gap: 4px;
        }
        .pulse-dot {
            width: 6px;
            height: 6px;
            background: var(--accent-primary);
            border-radius: 50%;
            animation: pulseAnim 1.4s infinite ease-in-out both;
        }
        .pulse-dot:nth-child(1) { animation-delay: -0.32s; }
        .pulse-dot:nth-child(2) { animation-delay: -0.16s; }
        @keyframes pulseAnim {
            0%, 80%, 100% { transform: scale(0); opacity: 0.3; }
            40% { transform: scale(1); opacity: 1; }
        }

        /* Docked Floating Input Area */
        .input-dock {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 16px 20px 20px 20px;
            background: linear-gradient(to top, var(--bg-main) 75%, transparent);
            display: flex;
            flex-direction: column;
            align-items: center;
            z-index: 30;
            /* Gradient area is visual only — do not intercept clicks underneath */
            pointer-events: none;
        }
        .input-dock > * {
            pointer-events: auto;
        }

        .input-box-wrapper {
            width: 100%;
            max-width: 820px;
            background: var(--input-bg);
            border: 1px solid var(--border-color);
            border-radius: 20px;
            padding: 8px 12px 8px 16px;
            display: flex;
            align-items: flex-end;
            gap: 10px;
            box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
            transition: border-color 0.2s, box-shadow 0.2s;
        }

        .input-box-wrapper:focus-within {
            border-color: var(--accent-primary);
            box-shadow: 0 0 0 2px var(--accent-glow), 0 10px 25px -5px rgba(0, 0, 0, 0.1);
        }

        .chat-textarea {
            flex: 1;
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-size: 16px;
            font-family: inherit;
            line-height: 1.5;
            resize: none;
            max-height: 180px;
            padding: 6px 0;
        }

        .chat-textarea::placeholder {
            color: var(--text-muted);
        }

        .btn-send {
            width: 36px;
            height: 36px;
            border-radius: 12px;
            background: #6366f1;
            border: none;
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.2s ease;
            flex-shrink: 0;
        }

        .btn-attach-img {
            background: transparent;
            border: none;
            color: #94a3b8;
            font-size: 16px;
            cursor: pointer;
            padding: 6px 10px;
            border-radius: 8px;
            transition: all 0.2s ease;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .btn-attach-img:hover {
            color: #38bdf8;
            background: rgba(56, 189, 248, 0.1);
        }

        .image-preview-slot {
            position: relative;
            display: inline-block;
            margin-right: 10px;
            margin-bottom: 6px;
        }

        .image-preview-slot img {
            height: 48px;
            width: auto;
            border-radius: 8px;
            border: 1px solid rgba(56, 189, 248, 0.4);
            object-fit: cover;
        }

        .btn-remove-img {
            position: absolute;
            top: -6px;
            right: -6px;
            width: 18px;
            height: 18px;
            border-radius: 50%;
            background: #ef4444;
            color: #ffffff;
            border: none;
            font-size: 10px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .btn-send:hover:not(:disabled) {
            background: #4f46e5;
            transform: scale(1.05);
        }

        .btn-send:disabled {
            background: #1e293b;
            color: #475569;
            cursor: not-allowed;
            transform: none;
        }

        .btn-send.btn-stop {
            background: #ef4444 !important;
            color: #ffffff !important;
            animation: pulseStop 1.4s infinite ease-in-out;
            box-shadow: 0 0 12px rgba(239, 68, 68, 0.45);
        }

        .stop-bar-floating {
            display: flex;
            justify-content: center;
            align-items: center;
            margin-bottom: 10px;
            animation: fadeIn 0.25s ease;
            position: relative;
            z-index: 40;
        }

        .btn-stop-floating {
            background: rgba(239, 68, 68, 0.25);
            border: 1px solid #ef4444;
            color: #ffffff;
            border-radius: 20px;
            padding: 7px 18px;
            font-size: 13px;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 8px;
            cursor: pointer;
            transition: all 0.2s ease;
            backdrop-filter: blur(12px);
            box-shadow: 0 4px 16px rgba(239, 68, 68, 0.35);
            animation: pulseStopBar 2s infinite ease-in-out;
        }

        @keyframes pulseStopBar {
            0%, 100% { box-shadow: 0 4px 16px rgba(239, 68, 68, 0.35); }
            50% { box-shadow: 0 4px 22px rgba(239, 68, 68, 0.7); }
        }

        .btn-stop-floating:hover {
            background: #ef4444;
            color: #ffffff;
            border-color: #f87171;
            transform: translateY(-1px) scale(1.03);
            box-shadow: 0 6px 20px rgba(239, 68, 68, 0.55);
        }

        .btn-stop-floating i {
            font-size: 11px;
        }

        @keyframes pulseStop {
            0%, 100% { transform: scale(1); }
            50% { transform: scale(1.08); }
        }

        .streaming-cursor {
            display: inline-block;
            width: 7px;
            height: 15px;
            background: #6366f1;
            margin-left: 3px;
            vertical-align: middle;
            animation: blinkCursor 0.8s infinite;
        }

        @keyframes blinkCursor {
            0%, 100% { opacity: 1; }
            50% { opacity: 0; }
        }

        .btn-websearch {
            background: rgba(30, 41, 59, 0.6);
            border: 1px solid #334155;
            color: #94a3b8;
            border-radius: 12px;
            padding: 6px 12px;
            font-size: 12px;
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 6px;
            cursor: pointer;
            transition: all 0.2s ease;
            height: 36px;
            flex-shrink: 0;
            user-select: none;
        }

        .btn-websearch:hover {
            background: #1e293b;
            color: #f1f5f9;
            border-color: #475569;
        }

        .btn-websearch.active {
            background: rgba(59, 130, 246, 0.18);
            border-color: #3b82f6;
            color: #60a5fa;
            box-shadow: 0 0 12px rgba(59, 130, 246, 0.35);
        }

        .sources-card {
            background: #0d1322;
            border: 1px solid #1e293b;
            border-radius: 10px;
            padding: 8px 12px;
            margin-bottom: 12px;
            font-size: 12px;
        }

        .sources-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            color: #38bdf8;
            font-weight: 600;
            user-select: none;
        }

        .sources-list {
            margin-top: 8px;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .source-link-item {
            display: flex;
            align-items: flex-start;
            gap: 8px;
            color: #cbd5e1;
            text-decoration: none;
            padding: 6px 10px;
            border-radius: 6px;
            background: rgba(30, 41, 59, 0.4);
            border: 1px solid #1e293b;
            transition: all 0.15s;
        }

        .source-link-item:hover {
            background: rgba(56, 189, 248, 0.12);
            border-color: #0284c7;
            color: #38bdf8;
        }

        .source-num {
            background: #1e293b;
            color: #38bdf8;
            font-size: 10px;
            font-weight: 700;
            width: 18px;
            height: 18px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            margin-top: 1px;
        }

        .source-title {
            font-weight: 500;
            line-height: 1.3;
        }

        .source-url {
            font-size: 10.5px;
            color: var(--text-muted);
            margin-top: 2px;
            word-break: break-all;
        }

        .dock-footer {
            margin-top: 6px;
            font-size: 11.5px;
            color: var(--text-muted);
            text-align: center;
        }

        @media (max-width: 768px) {
            .topbar {
                height: 52px;
                padding: 4px 8px;
                gap: 6px;
                /* Do NOT scroll the whole topbar — that pushed right-side buttons off-screen */
                overflow: hidden;
                white-space: nowrap;
                align-items: center;
                /* Keep topbar above drawer/backdrop so controls stay tappable */
                position: relative;
                z-index: 60;
            }
            .sidebar {
                position: fixed;
                left: 0;
                top: 52px; /* below topbar — drawer no longer covers header controls */
                bottom: 0;
                transform: translateX(-100%);
                /* Closed drawer must not steal taps from main UI */
                pointer-events: none;
                z-index: 50;
            }
            .sidebar.mobile-open {
                transform: translateX(0);
                pointer-events: auto;
            }
            .sidebar-backdrop {
                display: none;
                position: fixed;
                top: 52px; /* do not cover topbar */
                left: 0;
                right: 0;
                bottom: 0;
                background: rgba(0, 0, 0, 0.65);
                z-index: 45;
                backdrop-filter: blur(4px);
                pointer-events: none;
            }
            .sidebar-backdrop.active {
                display: block;
                pointer-events: auto;
            }
            .topbar-left {
                display: flex;
                align-items: center;
                flex-wrap: nowrap;
                gap: 5px;
                flex: 1 1 auto;
                min-width: 0; /* allow shrink so horizontal scroll stays inside left cluster */
                overflow-x: auto;
                overflow-y: hidden;
                -webkit-overflow-scrolling: touch;
                touch-action: pan-x;
            }
            .topbar-left::-webkit-scrollbar {
                display: none;
            }
            .topbar-right {
                display: flex;
                align-items: center;
                gap: 4px;
                flex: 0 0 auto; /* pinned — always tappable on mobile */
                margin-left: 4px;
                position: relative;
                z-index: 2;
                /* Solid fill so clipped left-cluster controls cannot look tappable underneath */
                background: var(--bg-main);
                box-shadow: -10px 0 12px var(--bg-main);
                padding-left: 6px;
            }
            .btn-mode span {
                /* Keep mode switcher compact so Chat/Coding stay in the left scrollport */
                max-width: 4.5rem;
                overflow: hidden;
                text-overflow: ellipsis;
            }
            .topbar .btn-icon,
            .topbar .btn-mode,
            .btn-send,
            .btn-attach-img,
            .btn-stop-floating,
            .suggestion-card {
                touch-action: manipulation;
                -webkit-tap-highlight-color: transparent;
            }
            #userLoginBtn.needs-login {
                border-color: #34d399;
                color: #34d399;
                box-shadow: 0 0 0 2px rgba(52, 211, 153, 0.25);
                animation: needsLoginPulse 1.6s ease-in-out infinite;
            }
            @keyframes needsLoginPulse {
                0%, 100% { box-shadow: 0 0 0 2px rgba(52, 211, 153, 0.2); }
                50% { box-shadow: 0 0 0 4px rgba(52, 211, 153, 0.45); }
            }
            .model-picker-wrap {
                max-width: 140px;
                flex-shrink: 0;
            }
            .model-select {
                max-width: 140px;
                font-size: 16px;
                padding: 4px 18px 4px 6px;
                height: 32px;
                text-overflow: ellipsis;
            }
            .model-select-arrow {
                right: 6px;
                font-size: 9px;
            }
            .btn-mode {
                padding: 4px 7px;
                font-size: 11px;
                height: 32px;
                white-space: nowrap;
                flex-shrink: 0;
            }
            .btn-mode span {
                font-size: 11px;
            }
            .workspace-chip {
                max-width: 120px;
                font-size: 10.5px;
                padding: 3px 6px;
                height: 32px;
                flex-shrink: 0;
            }
            #workspacePathLabel {
                overflow: hidden;
                text-overflow: ellipsis;
                white-space: nowrap;
                max-width: 70px;
            }
            .show-all-models-wrap {
                flex-shrink: 0;
            }
            .show-all-models-wrap span {
                display: none;
            }
            .token-tracker-chip {
                display: none !important;
            }
            .chat-inner {
                padding: 12px 8px 180px 8px;
                gap: 14px;
            }
            .msg-row {
                gap: 8px;
            }
            .msg-avatar {
                width: 26px;
                height: 26px;
                font-size: 10.5px;
                border-radius: 8px;
            }
            .msg-body-wrapper {
                max-width: calc(100% - 34px);
            }
            .msg-row.user .msg-content,
            .msg-row.bot .msg-content {
                font-size: 13px;
                line-height: 1.5;
                padding: 10px 14px;
            }
            .input-dock {
                position: fixed;
                bottom: 0;
                left: 0;
                right: 0;
                padding: 8px 10px calc(8px + env(safe-area-inset-bottom, 0px)) 10px;
                background: var(--bg-main);
                z-index: 40; /* below open sidebar (50); above chat content */
                /* Transparent dock chrome must not block taps on message action buttons */
                pointer-events: none;
            }
            .input-dock > * {
                pointer-events: auto;
            }
            .input-box-wrapper {
                padding: 6px 10px;
                border-radius: 16px;
            }
            .chat-textarea {
                font-size: 16px;
            }
            .dock-footer {
                display: none !important;
            }
            .modal-content {
                width: 95% !important;
                max-width: 95% !important;
                margin: 6px auto;
                padding: 14px !important;
            }
        }