.layout {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  min-height: 100vh;
  min-height: 100svh;
  height: 100dvh;
  width: 100%;
  overflow: hidden;
}

.drawer {
  position: relative;
  display: flex;
  min-height: 100vh;
  min-height: 100svh;
  height: 100dvh;
  background: var(--threads-drawer-bg, var(--card));
  border-right: 1px solid var(--threads-drawer-border, var(--border));
  transition:
    width 180ms ease,
    box-shadow 180ms ease;
}

.drawerOpen {
  width: 18rem;
  box-shadow: var(--threads-drawer-shadow, 4px 0 20px rgb(0 0 0 / 0.04));
}

.drawerClosed {
  width: 3.5rem;
}

/* First-paint placeholder (rendered by ThreadsPanelGate before the client-only
   drawer mounts). Matches the open drawer's footprint + surface so there's no
   bare-background column flash and no content shift on mount. On mobile the
   real drawer floats (no grid footprint), so the placeholder reserves nothing. */
.drawerPlaceholder {
  width: 18rem;
  flex-shrink: 0;
  min-height: 100vh;
  min-height: 100svh;
  height: 100dvh;
  background: var(--threads-drawer-bg, var(--card));
  border-right: 1px solid var(--threads-drawer-border, var(--border));
}

.drawerSurface {
  display: flex;
  flex: 1;
  height: 100%;
  flex-direction: column;
  overflow: hidden;
}

.drawerHeader {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 1rem 1rem 0.75rem;
  border-bottom: 1px solid var(--border);
}

.drawerHeaderMain {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 0.25rem;
  font-family: var(--font-body);
}

.drawerTitle {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--foreground);
}

.headerActions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.iconButton {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border: 0;
  border-radius: var(--radius);
  color: var(--muted-foreground);
  background: transparent;
  transition:
    background-color 140ms ease,
    color 140ms ease;
  cursor: pointer;
}

.iconButton:hover,
.iconButton:focus-visible {
  background: var(--secondary);
  color: var(--foreground);
}

.iconButton:focus-visible,
.threadItem:focus-visible,
.newThreadButton:focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 2px;
}

.newThreadButton {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  min-height: 2.25rem;
  padding: 0.5rem 0.75rem;
  border: 0;
  border-radius: var(--radius);
  background: var(--primary);
  color: var(--primary-foreground);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition:
    opacity 140ms ease,
    transform 140ms ease;
}

.newThreadButton:hover {
  opacity: 0.9;
}

.filterBar {
  display: flex;
  align-items: center;
  padding: 0.5rem 1rem;
  border-bottom: 1px solid var(--border);
}

.segmented {
  display: inline-flex;
  width: 100%;
  padding: 0.2rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--secondary);
  gap: 0.15rem;
}

.segmentedOption {
  flex: 1;
  min-height: 1.75rem;
  padding: 0.3rem 0.75rem;
  border: 0;
  border-radius: calc(var(--radius) - 0.15rem);
  background: transparent;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--muted-foreground);
  cursor: pointer;
  transition:
    background-color 140ms ease,
    color 140ms ease,
    box-shadow 140ms ease;
}

.segmentedOption:hover {
  color: var(--foreground);
}

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

.segmentedOptionActive {
  background: var(--card);
  color: var(--foreground);
  box-shadow: var(--threads-segment-active-shadow, 0 1px 2px rgb(0 0 0 / 0.06));
}

.drawerContent {
  display: flex;
  flex: 1;
  min-height: 0;
  flex-direction: column;
  overflow: hidden;
}

.threadList {
  display: flex;
  flex: 1;
  min-height: 0;
  flex-direction: column;
  gap: 0.25rem;
  overflow-y: auto;
  /* Reserve scrollbar space so the list doesn't shift horizontally
     when the scrollbar appears during the thread-enter animation. */
  scrollbar-gutter: stable;
  padding: 0.75rem 0.5rem;
}

.threadRow {
  position: relative;
}

.threadItem {
  display: flex;
  width: 100%;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 0.65rem;
  border: 0;
  border-radius: var(--radius);
  background: transparent;
  color: inherit;
  text-align: left;
  cursor: pointer;
  transition:
    background-color 140ms ease,
    box-shadow 140ms ease,
    padding-right 140ms ease;
}

.threadItem:hover,
.threadItem:focus-visible {
  background: var(--secondary);
}

.threadRow:hover .threadItem,
.threadRow:focus-within .threadItem {
  padding-right: 3.5rem;
}

.threadItemSelected {
  background: var(--accent);
  box-shadow: inset 0 0 0 1px var(--border);
}

.threadItemAnimatingIn {
  animation: threadItemEnter 420ms cubic-bezier(0.16, 1, 0.3, 1);
}

.threadAccent {
  flex: none;
  width: 0.35rem;
  height: 1.75rem;
  border-radius: 999px;
  background: var(--border);
  transition: background 140ms ease;
}

.threadItemSelected .threadAccent {
  background: var(--primary);
}

.threadBody {
  display: flex;
  min-width: 0;
  flex: 1;
  flex-direction: column;
  gap: 0.15rem;
}

.threadTitle {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--foreground);
}

.threadTitlePlaceholder {
  color: var(--muted-foreground);
  font-weight: 500;
}

.threadTitleAnimated {
  display: inline-block;
  animation: generatedTitleReveal 360ms cubic-bezier(0.22, 1, 0.36, 1);
  transform-origin: left center;
}

.threadMeta {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.7rem;
  color: var(--muted-foreground);
}

.threadItemArchived .threadTitle {
  color: var(--muted-foreground);
  font-weight: 500;
}

.threadItemArchived .threadAccent {
  opacity: 0.5;
}

.archivedBadge {
  display: inline-block;
  margin-left: 0.35rem;
  padding: 0.05rem 0.35rem;
  border-radius: 999px;
  background: var(--secondary);
  font-size: 0.6rem;
  font-weight: 600;
  color: var(--muted-foreground);
  vertical-align: middle;
}

.loadMoreButton {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 2rem;
  margin-top: 0.25rem;
  padding: 0.4rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--muted-foreground);
  cursor: pointer;
  transition:
    background-color 140ms ease,
    color 140ms ease;
}

.loadMoreButton:hover:not(:disabled) {
  background: var(--secondary);
  color: var(--foreground);
}

.loadMoreButton:disabled {
  opacity: 0.6;
  cursor: default;
}

.threadActions {
  position: absolute;
  right: 0.4rem;
  top: 50%;
  display: flex;
  align-items: center;
  gap: 0.15rem;
  transform: translateY(-50%) scale(0.96);
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 140ms ease,
    transform 140ms ease;
}

.threadRow:hover .threadActions,
.threadRow:focus-within .threadActions {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(-50%) scale(1);
}

.threadActionButton {
  width: 1.75rem;
  height: 1.75rem;
}

.tooltip {
  position: relative;
}

.tooltip::after {
  content: attr(data-tooltip);
  position: absolute;
  top: calc(100% + 0.3rem);
  left: 50%;
  transform: translateX(-50%) translateY(-2px);
  padding: 0.2rem 0.45rem;
  border-radius: var(--threads-tooltip-radius, calc(var(--radius) - 0.45rem));
  border: 1px solid var(--border);
  background: var(--foreground);
  color: var(--background);
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 500;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 110ms ease 200ms,
    transform 110ms ease 200ms;
  z-index: 20;
}

.tooltip:hover::after,
.tooltip:focus-visible::after {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.deleteButton {
  color: var(--destructive);
}

.deleteButton:hover,
.deleteButton:focus-visible {
  background: var(
    --threads-delete-hover-bg,
    color-mix(in srgb, var(--destructive) 10%, transparent)
  );
  color: var(--destructive);
}

.loadingList {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 0.2rem 0;
}

.loadingRow {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 0.65rem;
  border-radius: var(--radius);
}

.loadingAccent {
  flex: none;
  width: 0.35rem;
  height: 1.75rem;
  border-radius: 999px;
  background: var(--secondary);
  animation: threadsDrawerPulse 1.4s ease-in-out infinite;
}

.loadingBody {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 0.4rem;
}

.loadingTitleBar {
  height: 0.6rem;
  width: 60%;
  border-radius: 999px;
  background: var(--secondary);
  animation: threadsDrawerPulse 1.4s ease-in-out infinite;
}

.loadingMetaBar {
  height: 0.45rem;
  width: 35%;
  border-radius: 999px;
  background: var(--secondary);
  animation: threadsDrawerPulse 1.4s ease-in-out infinite;
  animation-delay: 140ms;
}

@keyframes threadsDrawerPulse {
  0%,
  100% {
    opacity: 0.45;
  }
  50% {
    opacity: 0.9;
  }
}

.emptyState {
  display: flex;
  flex: 1;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.emptyCard {
  display: flex;
  max-width: 13rem;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  font-family: var(--font-body);
}

.emptyTitle {
  margin: 0;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--foreground);
}

.emptyMessage {
  margin: 0;
  font-size: 0.78rem;
  line-height: 1.4;
  color: var(--muted-foreground);
}

.collapsedRail {
  display: flex;
  width: 100%;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 0.5rem;
}

.mainPanel {
  min-width: 0;
  min-height: 100vh;
  min-height: 100svh;
  height: 100dvh;
  overflow: auto;
}

.dialogOverlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: var(--threads-overlay-bg, rgb(0 0 0 / 0.5));
  backdrop-filter: blur(2px);
  animation: dialogOverlayEnter 140ms ease-out;
}

.dialog {
  width: 100%;
  max-width: 22rem;
  padding: 1.1rem 1.1rem 1rem;
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) + 0.25rem);
  background: var(--card);
  color: var(--foreground);
  box-shadow: var(--threads-dialog-shadow, 0 20px 50px rgb(0 0 0 / 0.25));
  font-family: var(--font-body);
  animation: dialogEnter 160ms cubic-bezier(0.22, 1, 0.36, 1);
}

.dialogTitle {
  margin: 0 0 0.35rem;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--foreground);
}

.dialogDescription {
  margin: 0 0 1rem;
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--muted-foreground);
}

.dialogActions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
}

.dialogButton {
  min-height: 2.25rem;
  padding: 0.5rem 0.95rem;
  border: 0;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition:
    background-color 140ms ease,
    color 140ms ease,
    opacity 140ms ease;
}

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

.dialogButtonSecondary {
  background: var(--secondary);
  color: var(--foreground);
}

.dialogButtonSecondary:hover {
  background: var(--border);
}

.dialogButtonPrimary {
  background: var(--primary);
  color: var(--primary-foreground);
}

.dialogButtonPrimary:hover {
  opacity: 0.9;
}

.dialogButtonDestructive {
  background: var(--destructive);
  color: var(--destructive-foreground);
}

.dialogButtonDestructive:hover {
  opacity: 0.9;
}

@keyframes dialogOverlayEnter {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes dialogEnter {
  from {
    opacity: 0;
    transform: translateY(6px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes threadItemEnter {
  0% {
    opacity: 0;
    transform: translateX(-10px);
    background: var(--secondary);
  }
  100% {
    opacity: 1;
    transform: translateX(0);
    background: transparent;
  }
}

@keyframes generatedTitleReveal {
  0% {
    opacity: 0;
    filter: blur(6px);
    transform: translateY(4px);
  }
  100% {
    opacity: 1;
    filter: blur(0);
    transform: translateY(0);
  }
}

/* Tablet + phone: the threads panel goes off-canvas so the content and the
   (full-screen) chat get the whole width instead of squeezing into a column. */
@media (max-width: 1024px) {
  .layout {
    position: relative;
    isolation: isolate;
    grid-template-columns: minmax(0, 1fr);
  }

  /* The mounted drawer floats on mobile, so the first-paint placeholder must
     reserve no column (otherwise content shifts left when the drawer mounts). */
  .drawerPlaceholder {
    display: none;
  }

  /* Collapsed: a small floating launcher pinned top-left, above the full-screen
     mobile chat (z-index 1200) so threads stay reachable over it. */
  .drawer.drawerClosed {
    position: fixed;
    top: 0.5rem;
    left: 0.5rem;
    width: auto;
    height: auto;
    /* Override the base drawer's full-viewport height + chrome so the closed
       state shrinks to a small floating launcher. */
    min-height: 0;
    border-right: 0;
    background: transparent;
    z-index: 1300;
  }

  .drawerClosed .collapsedRail {
    flex-direction: row;
    width: auto;
    height: auto;
    gap: 0.125rem;
    padding: 0.1875rem;
    overflow: visible;
    border-radius: 999px;
    background: var(--threads-drawer-bg, var(--card));
    border: 1px solid var(--threads-drawer-border, var(--border));
    box-shadow: 0 8px 24px rgb(0 0 0 / 0.16);
  }

  /* Trim the launcher's icon buttons so the pill's height lines up with the
     top-right Chat/App toggle instead of towering over it. */
  .drawerClosed .collapsedRail .iconButton {
    width: 1.75rem;
    height: 1.75rem;
  }

  /* Open: full-height off-canvas panel from the left, above the chat. */
  .drawer.drawerOpen {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 1300;
    width: min(20rem, 92vw);
    box-shadow: 0 20px 50px rgb(0 0 0 / 0.25);
  }

  .mainPanel {
    grid-column: 1;
    position: relative;
    z-index: 1;
  }
}