/* Export page chrome — dense devtool aesthetic shared with the tv- tool
       cards (tool-render.css): mono type, hairline borders via color-mix,
       small radii, tinted neutrals, whisper hovers. All colors derive from
       the theme vars injected on :root (--text, --muted, --dim, --accent,
       --border, --success, --error, --warning, --body-bg, --container-bg,
       --info-bg, …) so light and dark themes both work. */

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

    :root {
      --line-height: 18px; /* 12px font * 1.5 */
      --sidebar-width: 400px;
      --sidebar-min-width: 240px;
      --sidebar-max-width: 840px;
      --sidebar-resizer-width: 6px;
      --content-max-width: 1100px;
      --hairline: color-mix(in srgb, var(--text) 10%, transparent);
      --hairline-soft: color-mix(in srgb, var(--text) 7%, transparent);
      --hairline-strong: color-mix(in srgb, var(--text) 18%, transparent);
      --hover-wash: color-mix(in srgb, var(--text) 5%, transparent);
      --inset-bg: var(--info-bg, color-mix(in srgb, var(--text) 4%, transparent));
      --ring: color-mix(in srgb, var(--accent) 70%, transparent);
      --radius-card: 8px;
      --radius-ctl: 6px;
    }

    html {
      scrollbar-width: thin;
      scrollbar-color: color-mix(in srgb, var(--text) 22%, transparent) transparent;
    }

    body {
      font-family: ui-monospace, 'SF Mono', 'Cascadia Code', 'Source Code Pro', Menlo, Consolas, 'DejaVu Sans Mono', monospace;
      font-size: 12px;
      line-height: var(--line-height);
      color: var(--text);
      background: var(--body-bg);
      -webkit-font-smoothing: antialiased;
    }

    ::selection {
      background: color-mix(in srgb, var(--accent) 28%, transparent);
    }

    :focus-visible {
      outline: 2px solid var(--ring);
      outline-offset: 1px;
    }

    /* Thin themed scrollbars everywhere */
    * {
      scrollbar-width: thin;
      scrollbar-color: color-mix(in srgb, var(--text) 22%, transparent) transparent;
    }

    ::-webkit-scrollbar {
      width: 8px;
      height: 8px;
    }

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

    ::-webkit-scrollbar-thumb {
      background: color-mix(in srgb, var(--text) 18%, transparent);
      border-radius: 4px;
    }

    ::-webkit-scrollbar-thumb:hover {
      background: color-mix(in srgb, var(--text) 30%, transparent);
    }

    body.sidebar-resizing {
      cursor: col-resize;
      user-select: none;
    }

    #app {
      display: flex;
      min-height: 100vh;
    }

    /* ================= Sidebar ================= */

    #sidebar {
      width: var(--sidebar-width);
      min-width: var(--sidebar-width);
      max-width: var(--sidebar-width);
      background: color-mix(in srgb, var(--container-bg) 72%, var(--body-bg));
      flex-shrink: 0;
      display: flex;
      flex-direction: column;
      position: sticky;
      top: 0;
      height: 100vh;
      border-right: 1px solid var(--hairline);
    }

    .sidebar-header {
      padding: 10px 12px 8px;
      flex-shrink: 0;
      border-bottom: 1px solid var(--hairline-soft);
    }

    .sidebar-controls {
      padding: 0 0 6px;
    }

    .sidebar-search {
      width: 100%;
      box-sizing: border-box;
      padding: 5px 9px;
      font-size: 11px;
      font-family: inherit;
      background: color-mix(in srgb, var(--body-bg) 70%, transparent);
      color: var(--text);
      border: 1px solid var(--hairline);
      border-radius: var(--radius-ctl);
      transition: border-color 0.12s ease, box-shadow 0.12s ease;
    }

    .sidebar-search:hover {
      border-color: var(--hairline-strong);
    }

    .sidebar-search:focus {
      outline: none;
      border-color: color-mix(in srgb, var(--accent) 55%, transparent);
      box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 18%, transparent);
    }

    .sidebar-search:focus-visible {
      outline: none;
    }

    .sidebar-search::placeholder {
      color: var(--muted);
    }

    .sidebar-filters {
      display: flex;
      gap: 4px;
      align-items: center;
      flex-wrap: wrap;
    }

    .filter-btn {
      padding: 2px 8px;
      font-size: 10px;
      font-family: inherit;
      background: transparent;
      color: var(--muted);
      border: 1px solid var(--hairline);
      border-radius: 999px;
      cursor: pointer;
      transition: color 0.12s ease, border-color 0.12s ease, background 0.12s ease, transform 0.08s ease;
    }

    .filter-btn:hover {
      color: var(--text);
      background: var(--hover-wash);
      border-color: var(--hairline-strong);
    }

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

    .filter-btn.active {
      background: color-mix(in srgb, var(--accent) 16%, transparent);
      color: color-mix(in srgb, var(--accent) 80%, var(--text));
      border-color: color-mix(in srgb, var(--accent) 45%, transparent);
    }

    .sidebar-close {
      display: none;
      width: 22px;
      height: 22px;
      padding: 0;
      font-size: 11px;
      line-height: 20px;
      font-family: inherit;
      background: transparent;
      color: var(--muted);
      border: 1px solid var(--hairline);
      border-radius: var(--radius-ctl);
      cursor: pointer;
      margin-left: auto;
      transition: color 0.12s ease, background 0.12s ease, transform 0.08s ease;
    }

    .sidebar-close:hover {
      color: var(--text);
      background: var(--hover-wash);
    }

    .sidebar-close:active {
      transform: scale(0.95);
    }

    .tree-container {
      flex: 1;
      overflow: auto;
      padding: 6px 0;
    }

    .tree-node {
      padding: 1px 10px;
      cursor: pointer;
      display: flex;
      align-items: baseline;
      font-size: 11px;
      line-height: 15px;
      white-space: nowrap;
    }

    .tree-node:hover {
      background: var(--hover-wash);
    }

    .tree-node.active {
      background: var(--selectedBg);
      box-shadow: inset 2px 0 0 var(--accent);
    }

    .tree-node.active .tree-content {
      font-weight: bold;
    }

    .tree-node.in-path {
      background: color-mix(in srgb, var(--accent) 8%, transparent);
    }

    .tree-node.in-path.active {
      background: var(--selectedBg);
    }

    .tree-node:not(.in-path) {
      opacity: 0.45;
    }

    .tree-node:not(.in-path):hover {
      opacity: 1;
    }

    .tree-prefix {
      color: color-mix(in srgb, var(--muted) 65%, transparent);
      flex-shrink: 0;
      font-family: inherit;
      white-space: pre;
    }

    .tree-marker {
      color: var(--accent);
      flex-shrink: 0;
    }

    .tree-content {
      color: var(--text);
    }

    .tree-label {
      color: color-mix(in srgb, var(--accent) 80%, var(--text));
    }

    .tree-role-user {
      color: var(--accent);
    }

    .tree-role-developer {
      color: var(--dim);
    }

    .tree-role-assistant {
      color: var(--success);
    }

    .tree-role-tool {
      color: var(--muted);
    }

    .tree-muted {
      color: var(--muted);
    }

    .tree-error {
      color: var(--error);
    }

    .tree-compaction {
      color: var(--borderAccent);
    }

    .tree-branch-summary {
      color: var(--warning);
    }

    .tree-custom-message {
      color: var(--customMessageLabel);
    }

    .tree-status {
      padding: 5px 12px;
      font-size: 10px;
      color: var(--muted);
      flex-shrink: 0;
      border-top: 1px solid var(--hairline-soft);
    }

    #sidebar-resizer {
      width: var(--sidebar-resizer-width);
      flex-shrink: 0;
      position: sticky;
      top: 0;
      height: 100vh;
      cursor: col-resize;
      touch-action: none;
      background: transparent;
      transition: background 0.12s ease;
    }

    #sidebar-resizer:hover,
    body.sidebar-resizing #sidebar-resizer {
      background: color-mix(in srgb, var(--accent) 25%, transparent);
    }

    /* ================= Main content ================= */

    #content {
      flex: 1;
      min-width: 0;
      padding: 20px 28px 48px;
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    #content > * {
      width: 100%;
      max-width: var(--content-max-width);
    }

    /* ================= Header card ================= */

    .header {
      background: color-mix(in srgb, var(--container-bg) 60%, var(--body-bg));
      border: 1px solid var(--hairline);
      border-radius: var(--radius-card);
      padding: 12px 16px;
      margin-bottom: 14px;
    }

    .header h1 {
      font-size: 12.5px;
      font-weight: 650;
      letter-spacing: 0.01em;
      color: var(--text);
      margin-bottom: 2px;
      overflow-wrap: anywhere;
    }

    .help-bar {
      font-size: 10px;
      color: var(--dim);
      margin-bottom: 10px;
    }

    .header-info {
      display: flex;
      flex-wrap: wrap;
      gap: 3px 22px;
      font-size: 11px;
    }

    .info-item {
      display: flex;
      align-items: baseline;
      gap: 6px;
      min-width: 0;
    }

    .info-label {
      font-size: 9.5px;
      font-weight: 600;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      color: var(--dim);
    }

    .info-value {
      color: var(--text);
      overflow-wrap: anywhere;
    }

    /* ================= System prompt / tools panels ================= */

    .system-prompt {
      background: color-mix(in srgb, var(--container-bg) 45%, var(--body-bg));
      border: 1px solid var(--hairline);
      border-radius: var(--radius-card);
      padding: 10px 14px;
      margin-bottom: 14px;
    }

    .system-prompt-header {
      font-size: 10px;
      font-weight: 600;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      color: var(--customMessageLabel, var(--muted));
    }

    .system-prompt-content {
      color: var(--customMessageText, var(--muted));
      white-space: pre-wrap;
      word-wrap: break-word;
      font-size: 11px;
      max-height: 240px;
      overflow-y: auto;
      overscroll-behavior: contain;
      margin-top: 8px;
      padding: 8px 10px;
      background: var(--inset-bg);
      border-radius: var(--radius-ctl);
    }

    .system-prompt.provider-prompt {
      border-left: 2px solid var(--warning);
    }

    .system-prompt-note {
      font-size: 10px;
      font-style: italic;
      color: var(--muted);
      margin-top: 6px;
    }

    .tools-list {
      background: color-mix(in srgb, var(--container-bg) 45%, var(--body-bg));
      border: 1px solid var(--hairline);
      border-radius: var(--radius-card);
      padding: 10px 14px;
      margin-bottom: 14px;
      cursor: pointer;
    }

    .tools-header {
      font-size: 10px;
      font-weight: 600;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      color: var(--warning);
      margin-bottom: 8px;
    }

    .tools-list.collapsed .tools-header {
      margin-bottom: 0;
    }

    .tools-list.collapsed .tools-content {
      display: none;
    }

    .tools-list:not(.collapsed) .tools-collapsed {
      display: none;
    }

    .tools-collapsed {
      margin-top: 6px;
      display: flex;
      flex-wrap: wrap;
      gap: 4px;
    }

    .tools-content {
      display: flex;
      flex-direction: column;
      gap: 3px;
      max-height: 320px;
      overflow-y: auto;
      overscroll-behavior: contain;
    }

    .tool-name-chip {
      display: inline-block;
      padding: 0 6px;
      border-radius: 3px;
      background: color-mix(in srgb, var(--text) 6%, transparent);
      color: var(--muted);
      font-size: 10px;
      line-height: 17px;
      font-weight: 500;
    }

    .tool-item {
      font-size: 11px;
    }

    .tool-item-name {
      font-weight: 600;
      color: var(--text);
    }

    .tool-item-desc {
      color: var(--dim);
    }

    /* ================= Messages ================= */

    #messages {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .message-timestamp {
      font-size: 10px;
      color: var(--dim);
      opacity: 0.85;
    }

    .user-message,
    .assistant-message {
      position: relative;
      border-radius: var(--radius-card);
    }

    .user-message > .message-timestamp,
    .assistant-message > .message-timestamp {
      position: absolute;
      top: 9px;
      right: 40px;
      line-height: 14px;
    }

    .user-message::before,
    .assistant-message::before {
      display: block;
      font-size: 9.5px;
      font-weight: 600;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      line-height: 14px;
      margin-bottom: 6px;
    }

    .user-message {
      background: color-mix(in srgb, var(--accent) 6%, transparent);
      border: 1px solid color-mix(in srgb, var(--accent) 22%, var(--hairline));
      color: var(--userMessageText, var(--text));
      padding: 9px 14px 11px;
    }

    .user-message::before {
      content: 'user';
      color: color-mix(in srgb, var(--accent) 85%, var(--text));
    }

    .user-message.developer-message {
      background: color-mix(in srgb, var(--text) 3%, transparent);
      border-color: var(--hairline);
    }

    .user-message.developer-message::before {
      content: 'developer';
      color: var(--dim);
    }

    .user-message.developer-message .markdown-content {
      color: var(--dim);
    }

    .assistant-message {
      display: flex;
      flex-direction: column;
      gap: 8px;
      padding: 0 1px;
    }

    .assistant-message::before {
      content: 'assistant';
      color: color-mix(in srgb, var(--success) 80%, var(--text));
      margin-bottom: -2px;
    }

    .assistant-text {
      padding: 0;
    }

    /* Copy link button - appears on hover */
    .copy-link-btn {
      position: absolute;
      top: 5px;
      right: 6px;
      width: 24px;
      height: 24px;
      padding: 5px;
      background: color-mix(in srgb, var(--body-bg) 70%, transparent);
      border: 1px solid var(--hairline);
      border-radius: var(--radius-ctl);
      color: var(--muted);
      cursor: pointer;
      opacity: 0;
      transition: opacity 0.15s ease, background 0.15s ease, color 0.15s ease, transform 0.08s ease;
      display: flex;
      align-items: center;
      justify-content: center;
      z-index: 10;
    }

    .copy-link-btn svg {
      width: 12px;
      height: 12px;
    }

    .user-message:hover .copy-link-btn,
    .assistant-message:hover .copy-link-btn,
    .copy-link-btn:focus-visible {
      opacity: 1;
    }

    .copy-link-btn:hover {
      background: var(--hover-wash);
      color: var(--text);
      border-color: var(--hairline-strong);
    }

    .copy-link-btn:active {
      transform: scale(0.92);
    }

    .copy-link-btn.copied {
      opacity: 1;
      background: color-mix(in srgb, var(--success) 15%, transparent);
      color: var(--success);
      border-color: color-mix(in srgb, var(--success) 45%, transparent);
    }

    /* Highlight effect for deep-linked messages */
    .user-message.highlight,
    .assistant-message.highlight {
      animation: highlight-pulse 2s ease-out;
    }

    @keyframes highlight-pulse {
      0% {
        box-shadow: 0 0 0 3px var(--accent);
      }
      100% {
        box-shadow: 0 0 0 0 transparent;
      }
    }

    /* ================= Thinking blocks ================= */

    .thinking-block {
      border-left: 2px solid var(--hairline-strong);
      padding: 1px 0 1px 12px;
    }

    .thinking-text {
      display: none;
      color: var(--thinkingText, var(--muted));
      font-style: italic;
      font-size: 11.5px;
      white-space: pre-wrap;
    }

    .thinking-collapsed {
      display: block;
      color: var(--dim);
      font-style: italic;
      font-size: 11px;
    }

    /* ================= Tool executions (bash / js) ================= */

    .tool-execution {
      border: 1px solid var(--hairline);
      border-radius: var(--radius-ctl);
      padding: 8px 12px;
      font-size: 11.5px;
      overflow: hidden;
    }

    .tool-execution.error {
      border-color: color-mix(in srgb, var(--error) 40%, var(--hairline));
    }

    .tool-execution.pending {
      border-style: dashed;
    }

    .tool-execution > .message-timestamp {
      float: right;
      margin-left: 10px;
    }

    /* Tool calls render inside the <omp-tool-view> web component, which draws
       its own card chrome; the host box collapses to a plain block. */
    omp-tool-view.tool-execution {
      display: block;
      padding: 0;
      background: none;
      border: none;
      border-radius: 0;
      overflow: visible;
    }

    .tool-command {
      font-weight: 600;
      white-space: pre-wrap;
      word-wrap: break-word;
      overflow-wrap: break-word;
      word-break: break-word;
      padding-left: 13px;
      position: relative;
    }

    .tool-command::before {
      content: '';
      position: absolute;
      left: 0;
      top: 5px;
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--dim);
    }

    .tool-execution.success > .tool-command::before {
      background: var(--success);
    }

    .tool-execution.error > .tool-command::before {
      background: var(--error);
    }

    .tool-output {
      margin-top: 8px;
      padding: 7px 9px;
      border-radius: 4px;
      background: var(--inset-bg);
      color: var(--toolOutput, var(--muted));
      word-wrap: break-word;
      overflow-wrap: break-word;
      word-break: break-word;
      font-family: inherit;
      font-size: 11.5px;
      overflow-x: auto;
    }

    .tool-output > div,
    .output-preview,
    .output-full {
      margin: 0;
      padding: 0;
      line-height: var(--line-height);
    }

    .tool-output pre {
      margin: 0;
      padding: 0;
      font-family: inherit;
      color: inherit;
      white-space: pre-wrap;
      word-wrap: break-word;
      overflow-wrap: break-word;
    }

    .tool-output code {
      padding: 0;
      background: none;
      color: var(--text);
    }

    .tool-output.expandable {
      cursor: pointer;
    }

    .tool-output.expandable:hover .expand-hint {
      color: var(--text);
      text-decoration: underline;
    }

    .tool-output.expandable .output-full {
      display: none;
    }

    .tool-output.expandable.expanded .output-preview {
      display: none;
    }

    .tool-output.expandable.expanded .output-full {
      display: block;
    }

    .expand-hint {
      color: var(--dim);
      font-size: 10.5px;
    }

    /* ================= Meta entries ================= */

    .model-change,
    .thinking-change {
      padding: 0 2px;
      color: var(--dim);
      font-size: 11px;
    }

    .model-name,
    .thinking-level {
      color: var(--borderAccent, var(--accent));
      font-weight: 600;
    }

    /* Compaction / Branch Summary - matches customMessage colors from TUI */
    .compaction {
      background: color-mix(in srgb, var(--customMessageBg, var(--container-bg)) 70%, var(--body-bg));
      border: 1px solid var(--hairline);
      border-radius: var(--radius-card);
      padding: 9px 14px;
      cursor: pointer;
    }

    .compaction-label {
      font-size: 10px;
      font-weight: 600;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      color: var(--customMessageLabel, var(--muted));
      margin-bottom: 2px;
    }

    .compaction-collapsed {
      color: var(--customMessageText, var(--muted));
      font-size: 11px;
    }

    .compaction-content {
      display: none;
      color: var(--customMessageText, var(--muted));
      white-space: pre-wrap;
      margin-top: 8px;
      font-size: 11.5px;
    }

    .compaction.expanded .compaction-collapsed {
      display: none;
    }

    .compaction.expanded .compaction-content {
      display: block;
    }

    .branch-summary {
      background: color-mix(in srgb, var(--customMessageBg, var(--container-bg)) 70%, var(--body-bg));
      border: 1px solid var(--hairline);
      border-radius: var(--radius-card);
      padding: 9px 14px;
    }

    .branch-summary-header {
      font-size: 10px;
      font-weight: 600;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      color: var(--borderAccent, var(--accent));
      margin-bottom: 4px;
    }

    /* Hook/custom messages */
    .hook-message {
      background: color-mix(in srgb, var(--customMessageBg, var(--container-bg)) 70%, var(--body-bg));
      border: 1px solid var(--hairline);
      border-radius: var(--radius-card);
      color: var(--customMessageText, var(--muted));
      padding: 9px 14px;
    }

    .hook-type {
      font-size: 10px;
      font-weight: 600;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      color: var(--customMessageLabel, var(--muted));
      margin-bottom: 2px;
    }

    /* Error */
    .error-text {
      color: var(--error);
      padding: 0 2px;
    }

    /* Share viewer fetch/decrypt failure (template.js showLoadError) */
    .share-load-error {
      margin: 36px auto;
      max-width: 640px;
      padding: 14px 16px;
      background: color-mix(in srgb, var(--error) 7%, transparent);
      border: 1px solid color-mix(in srgb, var(--error) 40%, transparent);
      border-radius: var(--radius-card);
      color: var(--error);
    }

    /* Images */
    .message-images {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 10px;
    }

    .message-image {
      max-width: 100%;
      max-height: 400px;
      border-radius: var(--radius-ctl);
      border: 1px solid var(--hairline);
      margin: 0;
    }

    /* ================= Markdown content ================= */

    .markdown-content {
      overflow-wrap: anywhere;
    }

    .markdown-content h1,
    .markdown-content h2,
    .markdown-content h3,
    .markdown-content h4,
    .markdown-content h5,
    .markdown-content h6 {
      color: var(--mdHeading, var(--text));
      margin: var(--line-height) 0 4px 0;
      font-weight: 650;
      line-height: 1.4;
    }

    .markdown-content h1:first-child,
    .markdown-content h2:first-child,
    .markdown-content h3:first-child {
      margin-top: 0;
    }

    .markdown-content h1 { font-size: 1.25em; }
    .markdown-content h2 { font-size: 1.15em; }
    .markdown-content h3 { font-size: 1.05em; }
    .markdown-content h4 { font-size: 1em; }
    .markdown-content h5 { font-size: 1em; }
    .markdown-content h6 { font-size: 1em; letter-spacing: 0.04em; }
    .markdown-content p { margin: 0; }
    .markdown-content p + p { margin-top: var(--line-height); }

    .markdown-content a {
      color: var(--mdLink, var(--accent));
      text-decoration: underline;
      text-decoration-color: color-mix(in srgb, var(--mdLink, var(--accent)) 45%, transparent);
      text-underline-offset: 2px;
    }

    .markdown-content a:hover {
      text-decoration-color: currentColor;
    }

    .markdown-content code {
      background: color-mix(in srgb, var(--text) 8%, transparent);
      color: var(--mdCode, var(--text));
      padding: 0 4px;
      border-radius: 3px;
      font-family: inherit;
      font-size: 0.95em;
    }

    .markdown-content pre {
      background: var(--inset-bg);
      border: 1px solid var(--hairline-soft);
      border-radius: var(--radius-ctl);
      padding: 8px 10px;
      margin: 10px 0;
      overflow-x: auto;
    }

    .markdown-content pre code {
      display: block;
      background: none;
      padding: 0;
      font-size: 11.5px;
      color: var(--text);
    }

    .markdown-content blockquote {
      border-left: 2px solid var(--mdQuoteBorder, var(--hairline-strong));
      padding-left: 12px;
      margin: 10px 0;
      color: var(--mdQuote, var(--muted));
      font-style: italic;
    }

    .markdown-content ul,
    .markdown-content ol {
      margin: 8px 0;
      padding-left: 26px;
    }

    .markdown-content li { margin: 0; }
    .markdown-content li + li { margin-top: 2px; }
    .markdown-content li::marker { color: var(--mdListBullet, var(--dim)); }

    .markdown-content hr {
      border: none;
      border-top: 1px solid var(--hairline);
      margin: 14px 0;
    }

    .markdown-content table {
      border-collapse: collapse;
      margin: 10px 0;
      width: 100%;
      font-size: 11.5px;
    }

    .markdown-content th,
    .markdown-content td {
      border: 1px solid var(--hairline);
      padding: 5px 9px;
      text-align: left;
    }

    .markdown-content th {
      background: color-mix(in srgb, var(--text) 5%, transparent);
      font-weight: 600;
    }

    .markdown-content img {
      max-width: 100%;
      border-radius: var(--radius-ctl);
      border: 1px solid var(--hairline);
    }

    /* ================= Syntax highlighting ================= */

    .hljs { background: transparent; color: var(--text); }
    .hljs-comment, .hljs-quote { color: var(--syntaxComment); }
    .hljs-keyword, .hljs-selector-tag { color: var(--syntaxKeyword); }
    .hljs-number, .hljs-literal { color: var(--syntaxNumber); }
    .hljs-string, .hljs-doctag { color: var(--syntaxString); }
    /* Function names: hljs v11 uses .hljs-title.function_ compound class */
    .hljs-function, .hljs-title, .hljs-title.function_, .hljs-section, .hljs-name { color: var(--syntaxFunction); }
    /* Types: hljs v11 uses .hljs-title.class_ for class names */
    .hljs-type, .hljs-class, .hljs-title.class_, .hljs-built_in { color: var(--syntaxType); }
    .hljs-attr, .hljs-variable, .hljs-variable.language_, .hljs-params, .hljs-property { color: var(--syntaxVariable); }
    .hljs-meta, .hljs-meta .hljs-keyword, .hljs-meta .hljs-string { color: var(--syntaxKeyword); }
    .hljs-operator { color: var(--syntaxOperator); }
    .hljs-punctuation { color: var(--syntaxPunctuation); }
    .hljs-subst { color: var(--text); }

    /* ================= Image modal ================= */

    .image-modal {
      display: none;
      position: fixed;
      inset: 0;
      z-index: 200;
      align-items: center;
      justify-content: center;
      padding: 32px;
      background: color-mix(in srgb, var(--body-bg) 72%, transparent);
      backdrop-filter: blur(3px);
    }

    .image-modal.open {
      display: flex;
    }

    .image-modal img {
      max-width: 100%;
      max-height: 100%;
      border-radius: var(--radius-card);
      border: 1px solid var(--hairline-strong);
      box-shadow: 0 16px 48px color-mix(in srgb, var(--text) 12%, transparent);
    }

    /* ================= Footer ================= */

    .footer {
      margin-top: 48px;
      padding: 16px 0 8px;
      text-align: center;
      color: var(--dim);
      font-size: 10px;
      border-top: 1px solid var(--hairline-soft);
    }

    /* ================= Mobile chrome ================= */

    #hamburger {
      display: none;
      position: fixed;
      top: 10px;
      left: 10px;
      z-index: 100;
      width: 28px;
      height: 28px;
      padding: 0;
      font-size: 12px;
      font-family: inherit;
      background: color-mix(in srgb, var(--body-bg) 80%, transparent);
      backdrop-filter: blur(3px);
      color: var(--muted);
      border: 1px solid var(--hairline);
      border-radius: var(--radius-ctl);
      cursor: pointer;
      align-items: center;
      justify-content: center;
      transition: color 0.12s ease, background 0.12s ease, transform 0.08s ease;
    }

    #hamburger:hover {
      color: var(--text);
      background: var(--hover-wash);
    }

    #hamburger:active {
      transform: scale(0.95);
    }

    #sidebar-overlay {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: color-mix(in srgb, var(--body-bg) 55%, transparent);
      backdrop-filter: blur(2px);
      z-index: 98;
    }

    @media (max-width: 900px) {
      #sidebar {
        position: fixed;
        transform: translateX(-100%);
        width: min(var(--sidebar-width), 100vw);
        min-width: 0;
        max-width: 100vw;
        top: 0;
        bottom: 0;
        height: 100vh;
        z-index: 99;
        transition: transform 0.25s ease;
        box-shadow: 8px 0 32px color-mix(in srgb, var(--text) 10%, transparent);
      }

      #sidebar.open {
        transform: translateX(0);
      }

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

      #hamburger {
        display: flex;
      }

      .sidebar-close {
        display: block;
      }

      #sidebar-resizer {
        display: none;
      }

      #content {
        padding: 48px 14px 32px;
      }

      #content > * {
        max-width: 100%;
      }
    }

    /* ================= Motion & print ================= */

    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
      }

      .filter-btn:active,
      .sidebar-close:active,
      .copy-link-btn:active,
      #hamburger:active {
        transform: none;
      }
    }

    @media print {
      #sidebar, #sidebar-toggle, #sidebar-resizer, #hamburger, .copy-link-btn { display: none !important; }
      body { background: white; color: black; }
      #content { max-width: none; padding: 0; }
      .user-message, .tool-execution, .compaction, .branch-summary, .hook-message { break-inside: avoid; }
    }

    /* ==== sub-session overlay (owned by template.js) ==== */

    #subsession-overlay {
      position: fixed;
      inset: 0;
      z-index: 1000;
      display: none;
    }

    #subsession-overlay.open {
      display: block;
    }

    .subsession-backdrop {
      position: absolute;
      inset: 0;
      background: color-mix(in srgb, var(--body-bg) 55%, transparent);
      backdrop-filter: blur(3px);
      -webkit-backdrop-filter: blur(3px);
    }

    .subsession-panel {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      display: flex;
      flex-direction: column;
      width: min(1100px, 92vw);
      max-height: 90vh;
      background: var(--container-bg);
      border: 1px solid var(--border);
      border-radius: 8px;
      box-shadow: 0 24px 64px color-mix(in srgb, var(--body-bg) 70%, transparent);
      outline: none;
      overflow: hidden;
    }

    .subsession-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding: 10px 14px;
      border-bottom: 1px solid var(--border);
      flex: none;
    }

    .subsession-breadcrumb {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 6px;
      min-width: 0;
    }

    .subsession-crumb {
      font: inherit;
      color: var(--accent);
      background: color-mix(in srgb, var(--accent) 12%, transparent);
      border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
      border-radius: 6px;
      padding: 1px 8px;
      max-width: 240px;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    button.subsession-crumb {
      cursor: pointer;
    }

    button.subsession-crumb:hover {
      background: color-mix(in srgb, var(--accent) 22%, transparent);
    }

    .subsession-crumb.current {
      color: var(--text);
      background: transparent;
      border-color: var(--border);
      font-weight: bold;
    }

    .subsession-crumb-sep {
      color: var(--muted);
      flex: none;
    }

    .subsession-close {
      font: inherit;
      font-size: 14px;
      line-height: 1;
      color: var(--muted);
      background: transparent;
      border: 1px solid var(--border);
      border-radius: 6px;
      width: 24px;
      height: 24px;
      flex: none;
      cursor: pointer;
    }

    .subsession-close:hover,
    .subsession-close:focus-visible {
      color: var(--text);
      border-color: var(--accent);
    }

    .subsession-meta {
      padding: 4px 14px;
      color: var(--muted);
      font-size: 11px;
      border-bottom: 1px solid var(--border);
      flex: none;
    }

    .subsession-body {
      flex: 1 1 auto;
      overflow-y: auto;
      padding: 14px;
      overscroll-behavior: contain;
    }

    .subsession-empty {
      color: var(--muted);
    }