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

  :root {
    --bg-app: #1e1e1e;
    --bg-sidebar: #252526;
    --bg-editor: #1e1e1e;
    --bg-panel: #1e1e1e;
    --bg-titlebar: #323233;
    --bg-tab: #2d2d2d;
    --bg-tab-active: #1e1e1e;
    --bg-statusbar: #007acc;
    --bg-input: #3c3c3c;
    --text-primary: #d4d4d4;
    --text-secondary: #858585;
    --text-dimmed: #6b6b6b;
    --text-white: #ffffff;
    --border: #3c3c3c;
    --border-light: #454545;
    --accent: #007acc;
    --accent-green: #4ec9b0;
    --accent-yellow: #dcdcaa;
    --accent-blue: #569cd6;
    --accent-orange: #ce9178;
    --accent-pink: #c586c0;
    --accent-red: #f44747;
    --indent: 1.5rem;
    --mono: 'JetBrains Mono', monospace;
    --sans: 'Inter', sans-serif;
    --serif: 'Instrument Serif', serif;
  }

  html, body {
    height: 100%;
    font-family: var(--sans);
    background: var(--bg-app);
    color: var(--text-primary);
    overflow: hidden;
  }

  /* ── VS Code Shell ─────────────────────────────────── */
  .vscode {
    display: flex;
    flex-direction: column;
    height: 100vh;
    width: 100vw;
  }

  /* Title Bar */
  .titlebar {
    height: 30px;
    background: var(--bg-titlebar);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    flex-shrink: 0;
    -webkit-app-region: drag;
  }
  .titlebar-title {
    font-size: 12px;
    color: var(--text-secondary);
    font-family: var(--sans);
  }
  .titlebar-dots {
    position: absolute;
    left: 14px;
    display: flex;
    gap: 8px;
  }
  .titlebar-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
  }
  .dot-red { background: #ff5f57; }
  .dot-yellow { background: #febc2e; }
  .dot-green { background: #28c840; }
  .titlebar-menu {
    position: absolute;
    left: 50px;
    display: flex;
    gap: 0;
  }
  .titlebar-menu span {
    font-size: 12px;
    color: var(--text-secondary);
    padding: 0 8px;
    line-height: 30px;
    cursor: default;
  }
  .titlebar-menu span:hover { background: rgba(255,255,255,0.06); }

  /* Main body row */
  .vscode-body {
    display: flex;
    flex: 1;
    overflow: hidden;
  }

  /* Activity Bar */
  .activitybar {
    width: 48px;
    background: #333333;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: 4px;
    gap: 0;
    border-right: 1px solid rgba(0,0,0,0.3);
  }
  .activity-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0.6;
    border-left: 2px solid transparent;
    transition: opacity 0.15s;
  }
  .activity-icon.active {
    opacity: 1;
    border-left-color: var(--text-primary);
  }
  .activity-icon:hover { opacity: 1; }
  .activity-icon svg { width: 24px; height: 24px; fill: currentColor; }

  /* Sidebar */
  .sidebar {
    width: 240px;
    background: var(--bg-sidebar);
    flex-shrink: 0;
    border-right: none;
    display: flex;
    flex-direction: column;
    overflow: hidden;
  }

  /* Sidebar resize handle */
  .sidebar-resize-handle {
    width: 5px;
    flex-shrink: 0;
    background: var(--border);
    cursor: col-resize;
    position: relative;
    z-index: 10;
    transition: background 0.15s;
  }
  .sidebar-resize-handle::after {
    content: '';
    position: absolute;
    inset: 0;
    margin: 0 -4px;
  }
  .sidebar-resize-handle:hover,
  .sidebar-resize-handle.is-dragging {
    background: var(--accent);
  }
  .sidebar-header {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-secondary);
    padding: 14px 20px 8px;
    flex-shrink: 0;
  }
  .file-tree { flex: 1; overflow-y: auto; font-size: 13px; }
  .tree-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 3px 12px 3px 20px;
    color: var(--text-secondary);
    cursor: pointer;
    white-space: nowrap;
    transition: background 0.1s;
    user-select: none;
  }
  .tree-item:hover { background: rgba(255,255,255,0.05); }
  .tree-item.active { background: rgba(0,122,204,0.2); color: var(--text-primary); }
  .tree-item.folder { color: var(--text-primary); font-weight: 500; }
  .tree-item svg { width: 16px; height: 16px; flex-shrink: 0; }
  .tree-item.indent-1 { padding-left: 32px; }
  .tree-item.indent-2 { padding-left: 44px; }
  .tree-item.indent-3 { padding-left: 56px; }

  /* Editor area */
  .editor-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
  }

  /* Tabs */
  .tabs {
    height: 35px;
    background: var(--bg-titlebar);
    display: flex;
    align-items: flex-end;
    flex-shrink: 0;
    border-bottom: 1px solid var(--border);
    overflow: hidden;
  }
  .tab {
    height: 35px;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0 14px;
    font-size: 13px;
    color: var(--text-secondary);
    background: var(--bg-tab);
    border-right: 1px solid var(--border);
    cursor: pointer;
    white-space: nowrap;
    user-select: none;
  }
  .tab.active {
    background: var(--bg-tab-active);
    color: var(--text-primary);
    border-top: 1px solid var(--accent);
  }
  .tab-dot { width: 8px; height: 8px; border-radius: 50%; }
  .tab-dot-md { background: #519aba; }
  .tab-dot-ts { background: #3178c6; }

  /* The editor / chat pane split */
  .editor-split {
    flex: 1;
    display: flex;
    overflow: hidden;
  }

  /* Chat pane — left 55% */
  .chat-pane {
    width: 55%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--bg-editor);
    flex-shrink: 0;
  }
  .chat-pane-header {
    height: 27px;
    background: var(--bg-titlebar);
    display: flex;
    align-items: center;
    padding: 0 14px;
    font-size: 11px;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
    gap: 8px;
  }
  .chat-pane-header .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent-green); }

  .chat-scroll {
    flex: 1;
    overflow-y: auto;
    padding: 20px 0;
    scroll-behavior: smooth;
  }
  .chat-scroll::-webkit-scrollbar { width: 8px; }
  .chat-scroll::-webkit-scrollbar-track { background: transparent; }
  .chat-scroll::-webkit-scrollbar-thumb { background: #4a4a4a; border-radius: 4px; }

  /* Phase divider */
  .phase-divider {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px 24px 8px;
    opacity: 0;
    transform: translateY(8px);
    transition: all 0.4s ease;
  }
  .phase-divider.visible { opacity: 1; transform: translateY(0); }
  .phase-divider-line { flex: 1; height: 1px; background: var(--border-light); }
  .phase-badge {
    font-family: var(--mono);
    font-size: 10px;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 3px 10px;
    border-radius: 100px;
    white-space: nowrap;
  }
  .badge-pm { background: rgba(86,156,214,0.15); color: #569cd6; border: 1px solid rgba(86,156,214,0.3); }
  .badge-ux { background: rgba(197,134,192,0.15); color: #c586c0; border: 1px solid rgba(197,134,192,0.3); }
  .badge-tpm { background: rgba(220,220,170,0.15); color: #dcdcaa; border: 1px solid rgba(220,220,170,0.3); }
  .badge-dev { background: rgba(78,201,176,0.15); color: #4ec9b0; border: 1px solid rgba(78,201,176,0.3); }
  .badge-sdet { background: rgba(244,71,71,0.15); color: #f44747; border: 1px solid rgba(244,71,71,0.3); }
  .badge-devops { background: rgba(206,145,120,0.15); color: #ce9178; border: 1px solid rgba(206,145,120,0.3); }

  /* Message bubbles */
  .msg {
    padding: 4px 24px;
    opacity: 0;
    transform: translateY(6px);
    transition: all 0.35s ease;
  }
  .msg.visible { opacity: 1; transform: translateY(0); }

  .msg-operator { padding: 8px 24px; }
  .msg-agent { padding: 4px 24px; }

  .msg-inner {
    display: flex;
    align-items: flex-start;
    gap: 12px;
  }

  .avatar {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--mono);
    font-size: 10px;
    font-weight: 600;
    margin-top: 1px;
    letter-spacing: 0;
  }
  .avatar-operator { background: #4a5568; color: #e2e8f0; }
  .avatar-pm { background: rgba(86,156,214,0.2); color: #569cd6; font-size: 9px; }
  .avatar-ux { background: rgba(197,134,192,0.2); color: #c586c0; font-size: 9px; }
  .avatar-tpm { background: rgba(220,220,170,0.2); color: #dcdcaa; font-size: 9px; }
  .avatar-dev { background: rgba(78,201,176,0.2); color: #4ec9b0; font-size: 9px; }
  .avatar-sdet { background: rgba(244,71,71,0.2); color: #f44747; font-size: 9px; }
  .avatar-devops { background: rgba(206,145,120,0.2); color: #ce9178; font-size: 9px; }

  .msg-content { flex: 1; min-width: 0; }
  .msg-meta {
    display: flex;
    align-items: baseline;
    gap: 10px;
    margin-bottom: 4px;
  }
  .msg-name {
    font-size: 12px;
    font-weight: 600;
  }
  .name-operator { color: var(--text-primary); }
  .name-pm { color: #569cd6; }
  .name-ux { color: #c586c0; }
  .name-tpm { color: #dcdcaa; }
  .name-dev { color: #4ec9b0; }
  .name-sdet { color: #f44747; }
  .name-devops { color: #ce9178; }

  .msg-time {
    font-family: var(--mono);
    font-size: 10px;
    color: var(--text-dimmed);
  }
  .msg-text {
    font-size: 13px;
    color: var(--text-primary);
    line-height: 1.65;
    white-space: pre-wrap;
  }
  .msg-text .mention {
    font-family: var(--mono);
    font-size: 11px;
    font-weight: 500;
    padding: 1px 5px;
    border-radius: 3px;
    background: rgba(0,122,204,0.15);
    color: #4fc1ff;
  }

  /* Typing indicator */
  .typing-indicator {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 0;
  }
  .typing-dot {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--text-secondary);
    animation: typingBounce 1.2s infinite;
  }
  .typing-dot:nth-child(2) { animation-delay: 0.2s; }
  .typing-dot:nth-child(3) { animation-delay: 0.4s; }
  @keyframes typingBounce {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.5; }
    30% { transform: translateY(-4px); opacity: 1; }
  }

  /* Output blocks */
  .output-block {
    margin-top: 10px;
    border-radius: 6px;
    background: #252526;
    border: 1px solid var(--border-light);
    overflow: hidden;
    font-family: var(--mono);
  }
  .output-block-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 14px;
    background: #2d2d2d;
    border-bottom: 1px solid var(--border);
    font-size: 11px;
    color: var(--text-secondary);
  }
  .output-block-lang {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-dimmed);
  }
  .output-block-body {
    padding: 12px 14px;
    font-size: 12px;
    line-height: 1.7;
    color: var(--text-primary);
    overflow-x: auto;
  }

  /* Task list */
  .task-list {
    margin-top: 10px;
    display: flex;
    flex-direction: column;
    gap: 4px;
  }
  .task-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--mono);
    font-size: 12px;
    color: var(--text-secondary);
    padding: 5px 10px;
    border-radius: 4px;
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--border);
    opacity: 0;
    transform: translateX(-6px);
    transition: all 0.3s ease;
  }
  .task-item.visible { opacity: 1; transform: translateX(0); }
  .task-icon { font-size: 11px; }
  .task-name { flex: 1; color: var(--text-primary); }
  .task-status {
    font-size: 10px;
    padding: 2px 6px;
    border-radius: 3px;
    letter-spacing: 0.04em;
    text-transform: uppercase;
  }
  .status-done { background: rgba(78,201,176,0.15); color: #4ec9b0; }
  .status-running { background: rgba(0,122,204,0.15); color: #4fc1ff; }

  /* Gate approved banner */
  .gate-banner {
    margin-top: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border-radius: 6px;
    background: rgba(78,201,176,0.08);
    border: 1px solid rgba(78,201,176,0.25);
    font-size: 12px;
    color: #4ec9b0;
    font-family: var(--mono);
    font-weight: 500;
  }
  .gate-icon { font-size: 14px; }

  /* Input bar */
  .chat-input-bar {
    padding: 12px 20px;
    border-top: 1px solid var(--border);
    background: var(--bg-editor);
    flex-shrink: 0;
  }
  .input-field {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--bg-input);
    border: 1px solid var(--border-light);
    border-radius: 6px;
    padding: 8px 12px;
    font-family: var(--mono);
    font-size: 12px;
    color: var(--text-secondary);
    position: relative;
    min-height: 38px;
  }
  .input-typed {
    color: var(--text-primary);
    white-space: pre-wrap;
  }
  .input-cursor {
    display: inline-block;
    width: 2px;
    height: 14px;
    background: var(--accent);
    vertical-align: middle;
    margin-left: 1px;
    animation: blink 1s step-end infinite;
  }
  @keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

  /* Right pane: spec preview */
  .spec-pane {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: #1e1e1e;
  }
  .spec-pane-header {
    height: 27px;
    background: var(--bg-titlebar);
    display: flex;
    align-items: center;
    padding: 0 14px;
    font-size: 11px;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
    gap: 6px;
  }
  .spec-scroll {
    flex: 1;
    overflow-y: auto;
    padding: 20px 24px;
    font-family: var(--mono);
    font-size: 12px;
    line-height: 1.7;
    color: var(--text-primary);
    scroll-behavior: smooth;
  }
  .spec-scroll::-webkit-scrollbar { width: 8px; }
  .spec-scroll::-webkit-scrollbar-track { background: transparent; }
  .spec-scroll::-webkit-scrollbar-thumb { background: #4a4a4a; border-radius: 4px; }

  .spec-content { opacity: 0; transition: opacity 0.5s ease; }
  .spec-content.visible { opacity: 1; }

  /* Line numbers */
  .spec-line { display: flex; gap: 16px; }
  .line-no {
    color: var(--text-dimmed);
    user-select: none;
    min-width: 24px;
    text-align: right;
    font-size: 11px;
  }
  .line-code { flex: 1; }

  .c-keyword { color: var(--accent-blue); }
  .c-string { color: var(--accent-orange); }
  .c-comment { color: #6a9955; font-style: italic; }
  .c-type { color: var(--accent-yellow); }
  .c-value { color: #b5cea8; }
  .c-heading { color: #4fc1ff; font-weight: 600; }
  .c-muted { color: var(--text-dimmed); }
  .c-green { color: var(--accent-green); }

  /* Status bar */
  .statusbar {
    height: 22px;
    background: var(--bg-statusbar);
    display: flex;
    align-items: center;
    padding: 0 12px;
    font-family: var(--mono);
    font-size: 11px;
    color: rgba(255,255,255,0.9);
    flex-shrink: 0;
    gap: 16px;
    justify-content: space-between;
  }
  .statusbar-left, .statusbar-right { display: flex; gap: 12px; align-items: center; }
  .statusbar-item { cursor: pointer; }
  .statusbar-item:hover { background: rgba(255,255,255,0.1); padding: 0 6px; border-radius: 2px; }

  /* Panel (bottom terminal-like) */
  .panel {
    height: 140px;
    background: #1e1e1e;
    border-top: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    overflow: hidden;
  }
  .panel-tabs {
    height: 27px;
    background: var(--bg-titlebar);
    display: flex;
    align-items: center;
    gap: 0;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
  }
  .panel-tab {
    height: 27px;
    padding: 0 14px;
    font-size: 11px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    cursor: pointer;
    border-bottom: 1px solid transparent;
  }
  .panel-tab.active {
    color: var(--text-primary);
    border-bottom-color: var(--accent);
  }
  .panel-body {
    flex: 1;
    overflow-y: auto;
    padding: 8px 14px;
    font-family: var(--mono);
    font-size: 11.5px;
    line-height: 1.6;
    color: var(--text-secondary);
  }
  .panel-body::-webkit-scrollbar { width: 6px; }
  .panel-body::-webkit-scrollbar-thumb { background: #4a4a4a; border-radius: 3px; }

  .terminal-line { display: block; }
  .terminal-line.success { color: var(--accent-green); }
  .terminal-line.info { color: #4fc1ff; }
  .terminal-line.warn { color: #dcdcaa; }
  .terminal-line.prompt { color: var(--text-secondary); }
  .terminal-line.hidden { opacity: 0; }
  .terminal-cursor {
    display: inline-block;
    width: 7px;
    height: 13px;
    background: var(--text-secondary);
    vertical-align: middle;
    animation: blink 1s step-end infinite;
  }

  /* Completion overlay */
  .completion-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.5s ease;
  }
  .completion-overlay.visible {
    opacity: 1;
    pointer-events: all;
  }
  .completion-card {
    background: #252526;
    border: 1px solid var(--border-light);
    border-radius: 12px;
    padding: 40px 48px;
    text-align: center;
    max-width: 480px;
    transform: scale(0.95);
    transition: transform 0.5s cubic-bezier(0.34,1.56,0.64,1);
  }
  .completion-overlay.visible .completion-card { transform: scale(1); }
  .completion-icon { font-size: 48px; margin-bottom: 16px; }
  .completion-title {
    font-family: var(--serif);
    font-size: 28px;
    font-weight: 400;
    color: var(--text-white);
    margin-bottom: 10px;
  }
  .completion-sub {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.65;
    margin-bottom: 24px;
  }
  .completion-phases {
    display: flex;
    gap: 8px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 28px;
  }
  .completion-phase {
    font-family: var(--mono);
    font-size: 10px;
    padding: 4px 10px;
    border-radius: 100px;
    border: 1px solid var(--border-light);
    color: var(--text-secondary);
  }
  .completion-phase.done { border-color: rgba(78,201,176,0.4); color: #4ec9b0; }
  .completion-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--sans);
    font-size: 13px;
    font-weight: 500;
    padding: 10px 22px;
    border-radius: 6px;
    background: var(--accent);
    color: #fff;
    border: none;
    cursor: pointer;
    transition: opacity 0.15s;
  }
  .completion-btn:hover { opacity: 0.88; }

  /* ── Completion buttons row ────────────────────────── */
  .completion-btns {
    display: flex;
    gap: 10px;
    justify-content: center;
  }
  .completion-btn-ghost {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--sans);
    font-size: 13px;
    font-weight: 500;
    padding: 10px 22px;
    border-radius: 6px;
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-light);
    cursor: pointer;
    transition: all 0.15s;
  }
  .completion-btn-ghost:hover { color: var(--text-primary); background: rgba(255,255,255,0.05); }

  /* ── Pause indicator ───────────────────────────────── */
  .pause-indicator {
    position: fixed;
    bottom: 82px;
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    background: rgba(30,30,30,0.95);
    border: 1px solid var(--border-light);
    border-radius: 100px;
    padding: 7px 18px 7px 14px;
    font-size: 12px;
    color: var(--text-secondary);
    font-family: var(--mono);
    backdrop-filter: blur(10px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
    z-index: 500;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 8px;
  }
  .pause-indicator.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
  .pause-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    flex-shrink: 0;
    animation: pausePulse 1.2s infinite;
  }
  @keyframes pausePulse { 0%,100%{opacity:1} 50%{opacity:0.3} }

  /* ── Post-close browse mode ──────────────────────────── */
  body.demo-done .chat-input-bar { opacity: 0; pointer-events: none; transition: opacity 0.3s; }
  body.demo-done .chat-scroll { padding-bottom: 16px; }

  /* Restart icon */
  .restart-section {
    position: fixed;
    bottom: 36px;
    right: 20px;
    z-index: 500;
  }
  .restart-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    font-family: var(--sans);
    font-size: 11px;
    color: var(--text-secondary);
    background: rgba(255,255,255,0.06);
    border: 1px solid var(--border-light);
    border-radius: 4px;
    padding: 6px 10px;
    cursor: pointer;
    transition: all 0.15s;
    opacity: 0;
  }
  .restart-btn.visible { opacity: 1; }
  .restart-btn:hover { background: rgba(255,255,255,0.1); color: var(--text-primary); }
</style>