/* internal/server/static/chrome.css
   Chrome-only styles. Scoped under .wb-shell so iframe content (rendered MD,
   authored HTML) is never affected. Tokens kept in sync with the spec design
   system at docs/superpowers/spec-design-system.html so chrome and prose
   share the same warm off-white. */

:root {
  --wb-bg:           #fafaf9;  /* warm off-white — shell, topbar, sidebar */
  --wb-surface:      #ffffff;  /* white — interactive controls (search, dropdown) */
  --wb-text:         #1c1917;
  --wb-muted:        #78716c;
  --wb-rule:         #e7e5e4;
  --wb-accent:       #b45309;
  --wb-accent-tint:  #fde6d8;  /* peachy — active page */
  --wb-accent-dark:  #7c2d12;
  --wb-accent-bg:    #fef3c7;  /* warm yellow — search highlight only */
  --wb-hover:        rgba(28, 25, 23, 0.045);
  --wb-shadow-1:     0 1px 2px rgba(28, 25, 23, 0.04), 0 1px 3px rgba(28, 25, 23, 0.06);
  --wb-shadow-2:     0 4px 6px rgba(28, 25, 23, 0.05), 0 10px 20px rgba(28, 25, 23, 0.08);

  --wb-sans:    'Source Sans 3', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --wb-topbar-h:  52px;
  --wb-sidebar-w: 280px;
}

/* Several shell mounts (#wb-resolve-mount, #wb-thread-header, …) ship with the
   `hidden` attribute and are revealed by toggling el.hidden in chrome.js. But
   component rules below set an explicit `display` (flex), and an author
   `display` always beats the UA `[hidden]{display:none}` rule — so without
   this the `hidden` attribute is a no-op and e.g. the empty resolve overlay
   permanently covers the document. Make `hidden` authoritative. */
.wb-shell [hidden] { display: none !important; }

.wb-shell {
  margin: 0;
  background: var(--wb-bg);
  color: var(--wb-text);
  font-family: var(--wb-sans);
  font-size: 14px;
  display: grid;
  grid-template-columns: var(--wb-sidebar-w) 1fr;
  grid-template-rows: auto var(--wb-topbar-h) 1fr;
  grid-template-areas:
    "banner  banner"
    "topbar  topbar"
    "sidebar main";
  /* dvh handles the iOS address-bar shrink/grow; vh fallback for older browsers. */
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
}

/* ─── topbar ─────────────────────────────────────────────────────────── */

.wb-topbar {
  grid-area: topbar;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 0 18px;
  background: var(--wb-bg);
  border-bottom: 1px solid var(--wb-rule);
}

/* Hamburger — visible on desktop for left-sidebar rail state and on mobile for overlay nav. */
.wb-menu {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: transparent;
  border: 1px solid var(--wb-rule);
  border-radius: 4px;
  padding: 0;
  width: 36px;
  height: 36px;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  color: var(--wb-text);
}
.wb-menu:hover { background: var(--wb-hover); }

.wb-title {
  font-weight: 600;
  font-size: 13.5px;
  letter-spacing: -0.005em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.wb-search {
  flex: 1;
  min-width: 0;            /* allow shrinking inside the flex row */
  max-width: 480px;
  padding: 7px 12px;
  border: 1px solid var(--wb-rule);
  border-radius: 5px;
  background: var(--wb-surface);
  color: var(--wb-text);
  font: inherit;
  transition: border-color 120ms ease, box-shadow 120ms ease;
}
.wb-search::placeholder { color: var(--wb-muted); }
.wb-search:hover { border-color: #d6d3d1; }
.wb-search:focus {
  outline: none;
  border-color: var(--wb-accent);
  box-shadow: 0 0 0 3px rgba(180, 83, 9, 0.15);
}

/* ─── auth chrome ────────────────────────────────────────────────────── */

.wb-auth {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  white-space: nowrap;
}

.wb-auth-user {
  color: var(--wb-muted);
  font-size: 13px;
}

.wb-auth-button {
  border: 1px solid var(--wb-rule);
  background: var(--wb-surface);
  color: var(--wb-text);
  border-radius: 4px;
  padding: 6px 10px;
  font: inherit;
  font-size: 13px;
  text-decoration: none;
  cursor: pointer;
}

/* ─── sidebar ────────────────────────────────────────────────────────── */

.wb-sidebar {
  grid-area: sidebar;
  border-right: 1px solid var(--wb-rule);
  background: var(--wb-bg);
  overflow: auto;
  padding: 14px 10px 24px;
  /* iOS momentum scroll */
  -webkit-overflow-scrolling: touch;
}

.wb-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

/* Root-level files render flat at the top — no disclosure wrapper, always
   visible. Nested groups sit below in their own <details> blocks. */
.wb-nav-root { list-style: none; margin: 0 0 12px; padding: 0; }

.wb-nav-root + .wb-group { margin-top: 0; }

.wb-group { margin: 0; }
.wb-group + .wb-group { margin-top: 2px; }

/* Hide native disclosure marker — we draw our own triangle for visual control. */
.wb-group > summary { list-style: none; }
.wb-group > summary::-webkit-details-marker { display: none; }

.wb-group > summary {
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--wb-muted);
  padding: 8px 8px 6px;
  border-radius: 4px;
  user-select: none;
}
.wb-group > summary:hover { color: var(--wb-text); background: var(--wb-hover); }

/* CSS-only disclosure triangle. Rotates on open. */
.wb-group > summary::before {
  content: "";
  width: 0;
  height: 0;
  border-left: 4px solid currentColor;
  border-top: 3px solid transparent;
  border-bottom: 3px solid transparent;
  transition: transform 140ms ease;
  flex-shrink: 0;
}
.wb-group[open] > summary::before { transform: rotate(90deg); }

.wb-nav ul {
  list-style: none;
  margin: 2px 0 0;
  padding: 0;
}
.wb-nav-root li,
.wb-group ul li { margin: 0; }

.wb-nav a {
  display: block;
  padding: 6px 10px;
  border-radius: 4px;
  color: var(--wb-text);
  text-decoration: none;
  font-size: 13.5px;
  line-height: 1.4;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: background-color 100ms ease;
}
.wb-group ul a { padding-left: 18px; }
.wb-nav a:hover { background: var(--wb-hover); }
.wb-nav a:focus-visible {
  outline: none;
  background: var(--wb-hover);
  box-shadow: 0 0 0 2px var(--wb-accent);
}
.wb-nav a[aria-current="page"] {
  background: var(--wb-accent-tint);
  color: var(--wb-accent);
  font-weight: 600;
}
.wb-nav a[aria-current="page"]:hover { background: var(--wb-accent-tint); }

/* ─── main ───────────────────────────────────────────────────────────── */

.wb-main {
  grid-area: main;
  position: relative;
  overflow: hidden;
  background: var(--wb-bg);
}

#wb-content {
  width: 100%;
  height: 100%;
  border: 0;
  background: var(--wb-bg);
}

/* ─── search results dropdown ────────────────────────────────────────── */

.wb-search-results {
  position: absolute;
  top: 8px;
  left: 12px;
  right: 12px;
  max-height: 60%;
  overflow: auto;
  background: var(--wb-surface);
  border: 1px solid var(--wb-rule);
  border-radius: 6px;
  box-shadow: var(--wb-shadow-2);
  z-index: 10;
  -webkit-overflow-scrolling: touch;
}
.wb-search-results:empty { display: none; }
.wb-search-results h3 {
  margin: 0;
  padding: 10px 14px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--wb-muted);
  background: var(--wb-bg);
  border-bottom: 1px solid var(--wb-rule);
}
.wb-search-results ul { list-style: none; margin: 0; padding: 4px 0; }
.wb-search-results li {
  padding: 8px 14px;
  border-bottom: 1px solid var(--wb-rule);
}
.wb-search-results li:last-child { border-bottom: none; }
.wb-search-results li a {
  color: var(--wb-text);
  text-decoration: none;
  font-weight: 600;
}
.wb-search-results li a:hover { color: var(--wb-accent); }
.wb-search-results li small { color: var(--wb-muted); margin-left: 6px; font-weight: 400; }
.wb-search-results .wb-snippet { margin: 4px 0 0; color: var(--wb-muted); font-size: 12px; line-height: 1.5; }
.wb-search-results .wb-snippet mark {
  background: var(--wb-accent-bg);
  color: var(--wb-text);
  padding: 0 2px;
  border-radius: 2px;
}
.wb-search-results .wb-empty { padding: 12px 14px; color: var(--wb-muted); font-size: 13px; margin: 0; }
.wb-search-results .wb-offline { color: var(--wb-accent); }

/* Backdrop is invisible on desktop. Mobile rules show it when the sidebar
   is open so a tap outside the sidebar dismisses the menu. */
.wb-backdrop {
  display: none;
}

/* ─── left sidebar state machine ──────────────────────────────────────── */

.wb-shell--left-rail { grid-template-columns: 16px 1fr; }
.wb-shell--left-rail .wb-sidebar {
  padding: 0;
  overflow: hidden;
  cursor: pointer;
}
.wb-shell--left-rail .wb-sidebar > * { display: none; }
.wb-shell--left-rail .wb-sidebar::before {
  content: "›";
  display: block;
  text-align: center;
  font-size: 13px;
  color: var(--wb-muted);
  padding-top: 10px;
}

.wb-shell--left-overlay .wb-sidebar {
  position: fixed;
  top: var(--wb-topbar-h);
  left: 0;
  bottom: 0;
  width: var(--wb-sidebar-w);
  z-index: 30;
  box-shadow: var(--wb-shadow-2);
  background: var(--wb-bg);
  padding: 14px 10px 24px;
  overflow: auto;
}
.wb-shell--left-overlay .wb-sidebar > * { display: revert; }
.wb-shell--left-overlay .wb-sidebar::before { display: none; }
.wb-shell--left-overlay .wb-sidebar { cursor: default; }

/* ─── Mobile breakpoint ──────────────────────────────────────────────── */

@media (max-width: 768px) {
  .wb-shell {
    /* Sidebar is no longer in the grid — it's an overlay. */
    grid-template-columns: 1fr;
    grid-template-rows: auto var(--wb-topbar-h) 1fr;
    grid-template-areas:
      "banner"
      "topbar"
      "main";
  }

  .wb-topbar { padding: 0 12px; gap: 10px; }

  .wb-menu { display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0; }

  /* Title is too cramped alongside hamburger + search on a phone. Hide it;
     the favicon / tab title still identifies the app. */
  .wb-title { display: none; }

  .wb-search {
    /* Bump tap target; iOS auto-zooms <16px inputs, so 16px font here. */
    padding: 9px 12px;
    font-size: 16px;
  }

  .wb-sidebar {
    position: fixed;
    top: var(--wb-topbar-h);
    left: 0;
    bottom: 0;
    width: min(85vw, var(--wb-sidebar-w));
    transform: translateX(-100%);
    transition: transform 180ms ease;
    z-index: 20;
    box-shadow: var(--wb-shadow-2);
  }

  .wb-shell.is-sidebar-open .wb-sidebar {
    transform: translateX(0);
  }

  .wb-backdrop {
    display: block;
    position: fixed;
    top: var(--wb-topbar-h);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(28, 25, 23, 0.32);
    opacity: 0;
    pointer-events: none;
    transition: opacity 180ms ease;
    z-index: 15;
  }

  .wb-shell.is-sidebar-open .wb-backdrop {
    opacity: 1;
    pointer-events: auto;
  }

  /* Larger tap targets on nav items. */
  .wb-group > summary { padding: 11px 8px; font-size: 12px; }
  .wb-nav a          { padding: 11px 10px; font-size: 14.5px; }
  .wb-group ul a     { padding-left: 20px; }

  .wb-search-results { left: 8px; right: 8px; top: 6px; }
  .wb-search-results li { padding: 11px 14px; }
}

/* ─── topic sidebar ─────────────────────────────────────────────────── */

.wb-main {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
}

.wb-topic-sidebar {
  /* width is set to 320px below to match the .wb-main grid track; without
     border-box the 12px padding + 1px border push the real width to 345px,
     overflowing the track and clipping the header/button past the viewport. */
  box-sizing: border-box;
  border-left: 1px solid var(--wb-rule);
  background: var(--wb-surface);
  overflow: auto;
  padding: 12px;
}

.wb-topic-sidebar__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 12px;
}

.wb-topic-sidebar__header h2 {
  margin: 0;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--wb-muted);
}

.wb-topic-sidebar button:not(.wb-btn) {
  border: 1px solid var(--wb-rule);
  background: var(--wb-bg);
  color: var(--wb-text);
  border-radius: 4px;
  padding: 6px 8px;
  font: inherit;
  cursor: pointer;
}

.wb-topic-card {
  width: 100%;
  text-align: left;
  margin: 0 0 8px;
  padding: 8px;
  border: 1px solid var(--wb-rule);
  border-radius: 6px;
  background: var(--wb-bg);
}

.wb-topic-card[aria-selected="true"] {
  border-color: var(--wb-accent);
  box-shadow: 0 0 0 2px rgba(180, 83, 9, .12);
}

.wb-topic-card__quote,
.wb-topic-card__preview,
.wb-topic-message {
  margin: 4px 0 0;
  color: var(--wb-muted);
  font-size: 12px;
  line-height: 1.45;
}

.wb-topic-list__subheader {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 10.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--wb-muted);
  margin: 8px 0 4px;
}
.wb-topic-list__subheader:first-child { margin-top: 0; }
.wb-topic-list__subheader > span { flex: 1; }
.wb-topic-list__subheader-select {
  border: 1px solid var(--wb-rule);
  background: var(--wb-surface);
  color: var(--wb-text);
  font: inherit;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: 3px;
  cursor: pointer;
}
.wb-topic-list__subheader-select:hover { background: var(--wb-hover); }

.wb-topic-card {
  position: relative;
  cursor: pointer;
}
.wb-topic-card__select {
  position: absolute;
  top: 8px;
  left: 8px;
  width: 14px;
  height: 14px;
  border: 1px solid var(--wb-rule);
  border-radius: 3px;
  background: var(--wb-surface);
  box-sizing: border-box;
}
.wb-topic-card__select--checked {
  background: var(--wb-accent);
  border-color: var(--wb-accent);
}
.wb-topic-card__select--checked::after {
  content: '';
  position: absolute;
  left: 3px;
  top: 0px;
  width: 4px;
  height: 8px;
  border: solid var(--wb-bg);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}
/* When multi-select is active, push card content right so it doesn't
   collide with the checkbox in the top-left. */
.wb-topic-list--multiselect .wb-topic-card { padding-left: 28px; }

.wb-multiselect-header {
  display: flex;
  gap: 8px;
  align-items: center;
  padding: 8px 12px;
  background: var(--wb-accent-tint);
  border-bottom: 1px solid var(--wb-rule);
  font-size: 12px;
}
.wb-multiselect-header__count { font-weight: 600; flex: 1; }
.wb-multiselect-header__cancel,
.wb-multiselect-header__submit {
  padding: 4px 10px;
  border: 1px solid var(--wb-rule);
  background: var(--wb-surface);
  color: var(--wb-text);
  font: inherit;
  font-size: 11px;
  font-weight: 600;
  border-radius: 4px;
  cursor: pointer;
}
.wb-multiselect-header__submit {
  background: var(--wb-accent);
  color: var(--wb-bg);
  border-color: var(--wb-accent);
}
.wb-multiselect-header__submit:hover:not([disabled]) {
  background: var(--wb-accent-dark);
}
.wb-multiselect-header__submit[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
}

.wb-topic-card__head {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 12.5px;
  margin-bottom: 2px;
}

.wb-topic-card__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--wb-accent-bg);
  border: 1px solid var(--wb-accent);
  flex-shrink: 0;
}
.wb-topic-card[data-kind="global"] .wb-topic-card__dot {
  background: var(--wb-rule);
  border-color: var(--wb-muted);
}
.wb-topic-card[data-kind="batch"] .wb-topic-card__dot {
  background: var(--wb-accent);
  border-color: var(--wb-accent);
}

.wb-topic-card__pill {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: var(--wb-accent);
  color: var(--wb-bg);
  padding: 1px 6px;
  border-radius: 3px;
}

.wb-batch-children {
  margin-left: 14px;
  padding-left: 8px;
  border-left: 2px solid var(--wb-accent);
}

.wb-batch-children > .wb-topic-card {
  margin-top: 4px;
}

.wb-topic-card__label { flex: 0 0 auto; }
.wb-topic-card__readers {
  margin-left: auto;
  display: flex;
  align-items: center;
}

.wb-topic-card__quote {
  font-style: italic;
}

.wb-btn {
  border: 1px solid var(--wb-rule);
  background: var(--wb-surface);
  color: var(--wb-text);
  border-radius: 4px;
  padding: 5px 10px;
  font: inherit;
  font-size: 12.5px;
  cursor: pointer;
}
.wb-btn:hover { background: var(--wb-hover); }
.wb-btn:disabled { opacity: 0.55; cursor: not-allowed; }
.wb-btn--primary { background: var(--wb-text); color: var(--wb-bg); border-color: var(--wb-text); }
.wb-btn--primary:hover { background: var(--wb-text); }
.wb-btn--accent { background: var(--wb-accent); color: var(--wb-bg); border-color: var(--wb-accent); }
.wb-btn--accent:hover { background: var(--wb-accent-dark, #7c2d12); }
.wb-btn--danger { background: var(--wb-accent-tint); color: #7c2d12; border-color: #7c2d12; }
.wb-btn--muted { color: var(--wb-muted); }

.wb-topic-thread {
  border-top: 1px solid var(--wb-rule);
  margin-top: 12px;
  padding-top: 12px;
}

.wb-topic-reply-form textarea {
  width: 100%;
  box-sizing: border-box;
  resize: vertical;
  border: 1px solid var(--wb-rule);
  border-radius: 4px;
  padding: 8px;
  font: inherit;
}

@media (max-width: 900px) {
  .wb-main {
    grid-template-columns: 1fr;
  }
  .wb-topic-sidebar {
    display: none;
  }
}

/* ─── right sidebar state machine ─────────────────────────────────────── */

.wb-topic-sidebar {
  width: 320px;
}

.wb-shell--right-rail .wb-main {
  grid-template-columns: minmax(0, 1fr) 16px;
}
.wb-shell--right-rail .wb-topic-sidebar {
  width: 16px;
  padding: 0;
  overflow: hidden;
  cursor: pointer;
}
.wb-shell--right-rail .wb-topic-sidebar > * { display: none; }
.wb-shell--right-rail .wb-topic-sidebar::before {
  content: "‹";
  display: block;
  text-align: center;
  font-size: 13px;
  color: var(--wb-muted);
  padding-top: 10px;
}

.wb-shell--right-overlay .wb-topic-sidebar {
  position: fixed;
  top: var(--wb-topbar-h);
  right: 0;
  bottom: 0;
  width: 320px;
  z-index: 30;
  box-shadow: var(--wb-shadow-2);
  overflow: auto;
  padding: 12px;
}
.wb-shell--right-overlay .wb-topic-sidebar > * { display: revert; }
.wb-shell--right-overlay .wb-topic-sidebar::before { display: none; }
.wb-shell--right-overlay .wb-topic-sidebar { cursor: default; }

/* Right-sidebar toggle button (topbar). Hidden by default; visible only when
   the right sidebar is in rail. */
.wb-right-toggle {
  width: 28px; height: 28px;
  border: 1px solid var(--wb-rule);
  border-radius: 4px;
  background: var(--wb-surface);
  color: var(--wb-muted);
  cursor: pointer;
  padding: 0;
  font: inherit;
}
.wb-right-toggle:hover { background: var(--wb-hover); }

/* ─── thread header ───────────────────────────────────────────────────── */

.wb-thread-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 8px 10px;
  background: var(--wb-bg);
  border-bottom: 1px solid var(--wb-rule);
  font-size: 12px;
  margin-bottom: 12px;
}

.wb-thread-header__title { font-weight: 600; }
.wb-thread-header__actions { display: flex; gap: 6px; }

.wb-btn.is-busy::after {
  content: " ⟳";
  display: inline-block;
  animation: wb-spin 900ms linear infinite;
}
@keyframes wb-spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

/* ─── modal backdrop + confirm card ───────────────────────────────────── */

.wb-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(28, 25, 23, 0.32);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
}

.wb-confirm {
  background: var(--wb-surface);
  border: 1px solid var(--wb-rule);
  border-radius: 6px;
  padding: 14px 16px;
  width: 360px;
  max-width: calc(100vw - 32px);
  box-shadow: 0 8px 24px rgba(28, 25, 23, .16);
}
.wb-confirm h4 {
  margin: 0 0 8px;
  font-size: 15px;
}
.wb-confirm p {
  margin: 0 0 12px;
  color: var(--wb-muted);
  font-size: 12.5px;
  line-height: 1.5;
}
.wb-confirm__actions {
  display: flex;
  justify-content: flex-end;
  gap: 6px;
}

/* ─── discard inline panel ────────────────────────────────────────────── */

.wb-discard {
  margin-bottom: 12px;
  padding: 10px 12px;
  background: var(--wb-accent-tint);
  border: 1px solid var(--wb-accent-dark);
  border-radius: 4px;
  font-size: 12px;
}
.wb-discard label {
  display: block;
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--wb-accent-dark);
  margin-bottom: 4px;
}
.wb-discard textarea {
  width: 100%;
  box-sizing: border-box;
  border: 1px solid var(--wb-rule);
  border-radius: 4px;
  padding: 6px 8px;
  font: inherit;
  background: var(--wb-surface);
  color: var(--wb-text);
  margin-bottom: 8px;
  min-height: 48px;
  resize: vertical;
}
.wb-discard__actions {
  display: flex;
  justify-content: flex-end;
  gap: 6px;
}

/* ─── compose-and-propose checkbox ────────────────────────────────────── */

.wb-reply-checkbox {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 6px 0 8px;
  color: var(--wb-muted);
  font-size: 12px;
  cursor: pointer;
}
.wb-reply-checkbox input { accent-color: var(--wb-accent); }

/* ─── agent-proposal message rows ─────────────────────────────────────── */

.wb-agent-msg {
  border-left: 3px solid var(--wb-accent);
  background: var(--wb-accent-bg);
  padding: 8px 10px;
  border-radius: 0 4px 4px 0;
  margin: 8px 0;
  font-size: 12.5px;
}
.wb-agent-msg--superseded,
.wb-agent-msg--stale {
  background: var(--wb-bg);
  border-left-color: var(--wb-muted);
  color: var(--wb-muted);
}
.wb-agent-msg__head {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-bottom: 4px;
  color: var(--wb-accent);
}
.wb-agent-msg--superseded .wb-agent-msg__head,
.wb-agent-msg--stale .wb-agent-msg__head { color: var(--wb-muted); }
.wb-agent-msg__body { margin: 0; }
.wb-agent-msg__footer {
  display: flex;
  justify-content: flex-end;
  gap: 6px;
  margin-top: 8px;
}

.wb-pill {
  display: inline-block;
  font-size: 9.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  padding: 2px 7px;
  border-radius: 99px;
}
.wb-pill--pending { background: var(--wb-accent); color: var(--wb-bg); }
.wb-pill--superseded { background: var(--wb-rule); color: var(--wb-muted); }
.wb-pill--stale-source,
.wb-pill--stale-topic { background: var(--wb-accent-tint); color: var(--wb-accent-dark); }

/* ─── Resolve mode ────────────────────────────────────────────────────── */

.wb-resolve {
  position: absolute;
  inset: 0;
  background: var(--wb-bg);
  display: flex;
  flex-direction: column;
  z-index: 10;
}

.wb-resolve__toolbar {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 10px;
  background: var(--wb-bg);
  border-bottom: 1px solid var(--wb-rule);
  font-size: 12px;
}
.wb-resolve__count { color: var(--wb-muted); }
.wb-resolve__count--expandable {
  background: transparent;
  border: 1px solid var(--wb-rule);
  border-radius: 3px;
  padding: 2px 6px;
  font: inherit;
  color: var(--wb-muted);
  cursor: pointer;
}
.wb-resolve__count--expandable:hover { background: var(--wb-hover); color: var(--wb-text); }
.wb-resolve__count--expandable[aria-expanded="true"] { background: var(--wb-hover); color: var(--wb-text); }
.wb-resolve__spacer { flex: 1; }

.wb-resolve__children {
  position: absolute;
  top: 100%;
  left: 10px;
  margin-top: 2px;
  background: var(--wb-surface);
  border: 1px solid var(--wb-rule);
  border-radius: 4px;
  box-shadow: var(--wb-shadow-2);
  padding: 4px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 200px;
  max-width: 360px;
  z-index: 5;
}
.wb-resolve__child {
  text-align: left;
  padding: 4px 8px;
  font-family: inherit;
  font-size: 12px;
  color: var(--wb-text);
  background: transparent;
  border: none;
  border-radius: 3px;
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.wb-resolve__child:hover { background: var(--wb-hover); }

.wb-seg {
  display: inline-flex;
  border: 1px solid var(--wb-rule);
  border-radius: 4px;
  overflow: hidden;
  background: var(--wb-surface);
}
.wb-seg__opt {
  padding: 3px 10px;
  font-size: 11px;
  color: var(--wb-muted);
  border-right: 1px solid var(--wb-rule);
  background: transparent;
  cursor: pointer;
  border: 0;
  border-right: 1px solid var(--wb-rule);
}
.wb-seg__opt:last-child { border-right: none; }
.wb-seg__opt.is-on { background: var(--wb-text); color: var(--wb-bg); }

.wb-resolve__banner {
  padding: 8px 12px;
  font-size: 12px;
  border-bottom: 1px solid var(--wb-rule);
}
.wb-resolve__banner--stale { background: var(--wb-accent-tint); color: var(--wb-accent-dark); }
.wb-resolve__banner--superseded { background: var(--wb-rule); color: var(--wb-muted); }

.wb-resolve__body { flex: 1; overflow: auto; }

/* ─── Tier 1 unified diff ─────────────────────────────────────────────── */

.wb-diff {
  margin: 0;
  padding: 10px 14px;
  background: #292524;
  color: #e7e5e4;
  font-family: 'JetBrains Mono', Menlo, Consolas, monospace;
  font-size: 11.5px;
  line-height: 1.55;
  overflow: auto;
  white-space: pre;
  /* Required on mobile — the parent .wb-resolve__body is also overflow:auto.
     Without max-width here, the inner <pre> would expand to fit its content
     and the parent would scroll instead of the pre, defeating the spec's
     "horizontally-scrollable <pre>" requirement. */
  max-width: 100%;
  box-sizing: border-box;
}
.wb-diff__line { display: block; }
.wb-diff__line--add { color: #86efac; }
.wb-diff__line--del { color: #fca5a5; }
.wb-diff__line--hunk { color: #fbbf24; }

/* ─── Tier 2 side-by-side ─────────────────────────────────────────────── */

.wb-tier2 {
  display: grid;
  grid-template-columns: minmax(360px, 1fr) minmax(360px, 1fr);
  height: 100%;
  min-height: 0;
}
.wb-tier2__pane {
  display: flex;
  flex-direction: column;
  min-height: 0;
  background: var(--wb-surface);
}
.wb-tier2__pane + .wb-tier2__pane { border-left: 1px solid var(--wb-rule); }
.wb-tier2__pane h4 {
  margin: 0;
  padding: 6px 10px;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--wb-muted);
  background: var(--wb-bg);
  border-bottom: 1px solid var(--wb-rule);
}
.wb-tier2__iframe {
  flex: 1;
  width: 100%;
  border: 0;
  background: var(--wb-bg);
}

/* ─── Approve inline editor ───────────────────────────────────────────── */

.wb-approve {
  padding: 10px 12px;
  background: var(--wb-accent-bg);
  border-bottom: 1px solid var(--wb-rule);
  font-size: 12px;
}
.wb-approve label {
  display: block;
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--wb-accent);
  margin-bottom: 4px;
}
.wb-approve input,
.wb-approve textarea {
  width: 100%;
  box-sizing: border-box;
  border: 1px solid var(--wb-rule);
  border-radius: 4px;
  padding: 6px 8px;
  font: inherit;
  background: var(--wb-surface);
  color: var(--wb-text);
  margin-bottom: 8px;
}
.wb-approve textarea {
  min-height: 50px;
  resize: vertical;
}
.wb-approve__actions {
  display: flex;
  justify-content: flex-end;
  gap: 6px;
}

/* ─── unread + new-messages pill ──────────────────────────────────────── */

.wb-topic-card--unread::after {
  content: "";
  position: absolute;
  top: 8px;
  right: 8px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--wb-accent);
}

.wb-pill-bar {
  text-align: center;
  padding: 6px 0;
}
.wb-pill-bar__pill {
  display: inline-block;
  background: var(--wb-text);
  color: var(--wb-bg);
  padding: 4px 12px;
  border-radius: 99px;
  font-size: 11.5px;
  font: inherit;
  border: 0;
  cursor: pointer;
}

/* ─── presence chips ──────────────────────────────────────────────────── */

.wb-presence {
  display: flex;
  gap: 4px;
  align-items: center;
  margin-left: 8px;
}

.wb-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 1px solid var(--wb-rule);
  background: var(--wb-accent-bg);
  color: var(--wb-accent);
  font-size: 11px;
  font-weight: 700;
}
.wb-chip--small { width: 18px; height: 18px; font-size: 9px; }
.wb-chip--small + .wb-chip--small { margin-left: -6px; }
.wb-chip--more {
  background: var(--wb-rule);
  color: var(--wb-muted);
  border-color: var(--wb-muted);
}

/* ─── toasts ──────────────────────────────────────────────────────────── */

.wb-toast-stack {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 320px;
  pointer-events: none;
}

.wb-toast {
  background: var(--wb-surface);
  border: 1px solid var(--wb-rule);
  border-radius: 6px;
  box-shadow: 0 8px 24px rgba(28, 25, 23, .16);
  padding: 10px 12px;
  font-size: 12.5px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  pointer-events: auto;
}
.wb-toast__body { flex: 1; }
.wb-toast__focus { color: var(--wb-accent); text-decoration: underline; cursor: pointer; }
.wb-toast__secondary { margin: 4px 0 0; color: var(--wb-muted); font-size: 11.5px; }
.wb-toast__close {
  background: transparent;
  border: 0;
  color: var(--wb-muted);
  font-size: 16px;
  line-height: 1;
  cursor: pointer;
  padding: 0 4px;
}

/* ─── dead-doc ────────────────────────────────────────────────────────── */

.wb-dead-doc {
  position: absolute;
  inset: 0;
  background: var(--wb-bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px 20px;
  color: var(--wb-muted);
}
.wb-dead-doc h3 {
  margin: 0 0 8px;
  color: var(--wb-text);
  font-family: 'Source Serif 4', Georgia, serif;
}
.wb-dead-doc a.wb-btn {
  text-decoration: none;
  display: inline-block;
  margin-top: 12px;
}

/* ─── mobile: right-side hamburger + topic-sidebar overlay ────────────── */

@media (max-width: 768px) {
  /* Show the right toggle for authenticated users; the existing display:none
     on .wb-topic-sidebar covers the default; the overlay state pops it. */
  .wb-shell--right-overlay .wb-topic-sidebar {
    display: block;
    position: fixed;
    top: var(--wb-topbar-h);
    right: 0;
    bottom: 0;
    width: min(85vw, 360px);
    z-index: 25;
    overflow: auto;
    box-shadow: var(--wb-shadow-2);
    padding: 12px;
  }
  /* Toast stack: max 2 visible, slightly smaller. */
  .wb-toast-stack { width: calc(100vw - 24px); right: 12px; bottom: 12px; }
}

/* ─── mobile: Resolve mode reflows (≤700px) ───────────────────────────── */

.wb-tier2__tabs { display: none; }

@media (max-width: 700px) {
  .wb-resolve__toolbar {
    flex-wrap: wrap;
    gap: 6px;
    padding: 4px 8px;
    font-size: 11px;
  }
  .wb-resolve__toolbar [data-resolve-approve],
  .wb-resolve__toolbar .wb-resolve__count {
    display: none;
  }
  .wb-resolve__children { display: none; }
  .wb-approve { display: none; }  /* approve editor hidden on mobile */

  /* Tier 2 → tabs */
  .wb-tier2 {
    display: flex;
    flex-direction: column;
  }
  .wb-tier2__pane { display: none; }
  .wb-tier2__pane.is-active { display: flex; }
  .wb-tier2__tabs {
    display: flex;
    border-bottom: 1px solid var(--wb-rule);
    background: var(--wb-bg);
  }
  .wb-tier2__tab {
    flex: 1;
    text-align: center;
    padding: 8px 0;
    font-size: 11.5px;
    color: var(--wb-muted);
    border-bottom: 2px solid transparent;
    background: transparent;
    border: 0;
    border-bottom: 2px solid transparent;
    cursor: pointer;
  }
  .wb-tier2__tab.is-on {
    color: var(--wb-accent);
    border-bottom-color: var(--wb-accent);
    font-weight: 600;
  }
}

/* ─── git sync-status banner ────────────────────────────────────────────── */

.wb-sync-banner {
  grid-area: banner;
  background: var(--wb-accent-dark);
  color: var(--wb-accent-bg);
  font-size: 13px;
  font-weight: 600;
  text-align: center;
  padding: 6px 12px;
}

/* Version footer — subtle build-identity stamp, bottom-right of the chrome. */
.wb-version {
  position: fixed;
  bottom: 0;
  right: 0;
  z-index: 5;
  padding: 2px 8px;
  font-size: 11px;
  line-height: 1.4;
  color: var(--wb-muted, #78716c);
  background: var(--wb-surface, #ffffff);
  border-top-left-radius: 4px;
  border-top: 1px solid var(--wb-rule, #e7e5e4);
  border-left: 1px solid var(--wb-rule, #e7e5e4);
  opacity: 0.6;
}
.wb-version:hover { opacity: 1; }
.wb-version a { color: inherit; text-decoration: none; }
.wb-version a:hover { text-decoration: underline; }