/*
 * Persistent HUE workspace shell.
 *
 * Desktop: Spaces rail -> project-scoped Sessions -> main work surface.
 * Narrow screens: the two navigation panes become deliberate drawers while
 * the main work surface keeps the full viewport. This static contract maps to
 * future SpaceRail.svelte and SessionSidebar.svelte components.
 */

:root {
  --project-rail-width: 13.75rem;
  --project-rail-collapsed-width: 4.75rem;
  --session-sidebar-width: 18rem;
  --shell-top: 2rem;
}

body.project-rail-collapsed {
  --project-rail-width: var(--project-rail-collapsed-width);
}

.app-shell {
  position: fixed;
  inset: var(--shell-top) 0 0;
  display: grid !important;
  grid-template-columns: var(--project-rail-width) var(--session-sidebar-width) minmax(0, 1fr);
  width: 100%;
  height: auto;
  min-height: 0;
  transition: grid-template-columns 180ms ease;
}

.app-shell .project-rail {
  position: relative;
  inset: auto;
  z-index: 30;
  display: flex;
  width: auto;
  height: auto;
  min-height: 0;
  padding: 0.85rem 0.65rem 0.7rem;
  overflow: hidden;
  background: hsl(var(--card) / 0.96);
  border: 0;
  border-right: 1px solid hsl(var(--border));
  box-shadow: 10px 0 30px rgb(0 0 0 / 0.07);
  backdrop-filter: blur(18px);
}

.rail-brand {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr) 2rem;
  align-items: center;
  gap: 0.55rem;
  min-height: 2.5rem;
  padding: 0 0.25rem 0.75rem;
  border-bottom: 1px solid hsl(var(--border));
}

.rail-brand > .rail-label {
  display: flex;
  min-width: 0;
  flex-direction: column;
}

.rail-brand > .rail-label strong {
  font-size: 0.86rem;
  letter-spacing: 0.08em;
}

.rail-brand > .rail-label small {
  overflow: hidden;
  color: hsl(var(--muted-foreground));
  font-size: 0.65rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.rail-collapse-button,
.rail-mobile-close-button,
.rail-add,
.session-back-button,
.session-add-button,
.session-close-button,
.pane-toggle {
  display: inline-grid;
  place-items: center;
  min-width: 2rem;
  height: 2rem;
  padding: 0;
  color: hsl(var(--muted-foreground));
  background: transparent;
  border: 1px solid transparent;
  border-radius: calc(var(--radius) - 0.2rem);
  cursor: pointer;
}

.rail-collapse-button:hover,
.rail-mobile-close-button:hover,
.rail-add:hover,
.session-back-button:hover,
.session-add-button:hover,
.session-close-button:hover,
.pane-toggle:hover {
  color: hsl(var(--foreground));
  background: hsl(var(--accent));
  border-color: hsl(var(--border));
}

.rail-collapse-button:focus-visible,
.rail-mobile-close-button:focus-visible,
.rail-add:focus-visible,
.session-back-button:focus-visible,
.session-add-button:focus-visible,
.session-close-button:focus-visible,
.pane-toggle:focus-visible,
.space-nav-item:focus-visible,
.session-item:focus-visible,
.mobile-bottom-nav button:focus-visible {
  outline: 2px solid hsl(var(--ring));
  outline-offset: 2px;
}

.rail-mobile-close-button,
.session-back-button,
.drawer-drag-edge,
.drawer-edge-swipe-zone {
  display: none;
}

.app-shell .project-rail nav {
  display: flex;
  min-height: 0;
  margin: 0.55rem 0 0;
  flex: 1;
  flex-direction: column;
  justify-content: flex-start;
  gap: 0;
  overflow: hidden auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
}

.rail-global,
.space-list,
.rail-utilities {
  display: flex;
  flex-direction: column;
  gap: 0.12rem;
}

.space-list {
  padding: 0.2rem 0 0.45rem;
  border-bottom: 1px solid hsl(var(--border));
}

.rail-utilities {
  padding-top: 0.2rem;
}

.rail-section-heading {
  display: flex;
  min-height: 1.75rem;
  align-items: center;
  justify-content: space-between;
}

.project-rail .nav-label {
  margin: 0.75rem 0.55rem 0.3rem;
  font-size: 0.58rem;
}

.project-rail .rail-section-heading .nav-label {
  margin-top: 0.45rem;
}

.project-rail .nav-item,
.space-nav-item {
  position: relative;
  display: flex !important;
  width: 100%;
  min-width: 0;
  min-height: 2.45rem;
  align-items: center;
  gap: 0.58rem;
  padding: 0.35rem 0.5rem;
  overflow: hidden;
  color: hsl(var(--muted-foreground));
  text-align: left;
  background: transparent;
  border: 1px solid transparent;
  border-radius: calc(var(--radius) - 0.12rem);
  cursor: pointer;
}

.project-rail .nav-item:hover,
.space-nav-item:hover {
  color: hsl(var(--foreground));
  background: hsl(var(--accent) / 0.68);
}

.project-rail .nav-item.active,
.space-nav-item.active {
  color: hsl(var(--foreground));
  background: hsl(var(--accent));
  border-color: hsl(var(--primary) / 0.15);
}

.project-rail .nav-item.active::before,
.space-nav-item.active::before {
  position: absolute;
  inset: 0.45rem auto 0.45rem 0;
  width: 2px;
  content: "";
  background: hsl(var(--primary));
  border-radius: 999px;
}

.project-rail .nav-item > span:first-child {
  display: inline-grid;
  width: 1.7rem;
  min-width: 1.7rem;
  height: 1.7rem;
  place-items: center;
  color: hsl(var(--muted-foreground));
  font-size: 0.88rem;
}

.project-rail .nav-item > .rail-label {
  min-width: 0;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.project-rail .nav-item em {
  min-width: 1.15rem;
  height: 1.15rem;
  margin-left: auto;
  padding: 0 0.25rem;
  border-radius: 999px;
  font-size: 0.58rem;
  font-style: normal;
  line-height: 1.15rem;
  text-align: center;
}

.space-glyph {
  display: inline-grid;
  width: 1.85rem;
  min-width: 1.85rem;
  height: 1.85rem;
  place-items: center;
  color: hsl(var(--foreground));
  font-size: 0.72rem;
  font-weight: 760;
  border: 1px solid hsl(var(--border));
  border-radius: 0.55rem;
  box-shadow: inset 0 1px 0 rgb(255 255 255 / 0.06);
}

.hue-space { background: hsl(var(--warning) / 0.14); border-color: hsl(var(--warning) / 0.3); }
.notidian-space { background: hsl(var(--success) / 0.13); border-color: hsl(var(--success) / 0.3); }
.valorlist-space { background: hsl(var(--info) / 0.13); border-color: hsl(var(--info) / 0.3); }
.supertaal-space { background: hsl(var(--decision) / 0.14); border-color: hsl(var(--decision) / 0.3); }
.health-space { background: hsl(var(--destructive) / 0.12); border-color: hsl(var(--destructive) / 0.27); }
.parenting-space { background: hsl(var(--primary) / 0.13); border-color: hsl(var(--primary) / 0.27); }
.custom-space { background: hsl(var(--primary) / 0.13); border-color: hsl(var(--primary) / 0.27); }

.space-copy {
  display: flex;
  min-width: 0;
  flex: 1;
  flex-direction: column;
  gap: 0.08rem;
}

.space-copy strong,
.space-copy small {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.space-copy strong {
  color: inherit;
  font-size: 0.77rem;
  font-weight: 630;
}

.space-copy small {
  color: hsl(var(--muted-foreground));
  font-size: 0.61rem;
}

.space-state {
  position: relative;
  display: inline-grid;
  min-width: 1rem;
  height: 1rem;
  margin-left: auto;
  place-items: center;
  color: hsl(var(--muted-foreground));
  font-size: 0.56rem;
  font-weight: 760;
  border-radius: 999px;
}

.space-state.running,
.space-state.quiet,
.space-state.attention-dot {
  width: 0.47rem;
  min-width: 0.47rem;
  height: 0.47rem;
}

.space-state.running { background: hsl(var(--success)); box-shadow: 0 0 0 3px hsl(var(--success) / 0.1); }
.space-state.quiet { background: hsl(var(--muted-foreground) / 0.55); }
.space-state.attention-dot { background: hsl(var(--warning)); box-shadow: 0 0 0 3px hsl(var(--warning) / 0.1); }
.space-state.decision { color: hsl(var(--decision)); background: hsl(var(--decision) / 0.13); }
.space-state.verified { color: hsl(var(--success)); background: hsl(var(--success) / 0.12); }

.project-rail .sidebar-foot {
  grid-template-columns: 2rem 2rem minmax(0, 1fr);
  gap: 0.35rem;
  margin-top: 0.55rem;
  padding-top: 0.55rem;
}

.project-rail .sidebar-foot .icon-button {
  display: inline-grid;
}

body.project-rail-collapsed .rail-label {
  display: none !important;
}

body.project-rail-collapsed .rail-brand {
  grid-template-columns: 1fr;
  justify-items: center;
}

body.project-rail-collapsed .rail-brand .brand-mark {
  display: none;
}

body.project-rail-collapsed .rail-collapse-button {
  transform: rotate(180deg);
}

body.project-rail-collapsed .project-rail .nav-label,
body.project-rail-collapsed .rail-section-heading {
  min-height: 0.45rem;
  margin: 0;
}

body.project-rail-collapsed .project-rail .nav-item,
body.project-rail-collapsed .space-nav-item {
  min-height: 2.65rem;
  justify-content: center;
  padding-inline: 0.25rem;
}

body.project-rail-collapsed .project-rail .nav-item > span:first-child,
body.project-rail-collapsed .space-glyph {
  width: 1.9rem;
  min-width: 1.9rem;
  height: 1.9rem;
}

body.project-rail-collapsed .project-rail .nav-item em,
body.project-rail-collapsed .space-state {
  position: absolute;
  top: 0.12rem;
  right: 0.15rem;
  margin: 0;
}

body.project-rail-collapsed .project-rail .sidebar-foot {
  grid-template-columns: 1fr;
  justify-items: center;
}

/* Project-scoped Sessions column */
.session-sidebar {
  position: relative;
  z-index: 24;
  display: flex;
  min-width: 0;
  min-height: 0;
  flex-direction: column;
  overflow: hidden;
  background: hsl(var(--background) / 0.76);
  border-right: 1px solid hsl(var(--border));
  box-shadow: 12px 0 34px rgb(0 0 0 / 0.05);
  backdrop-filter: blur(18px) saturate(1.05);
}

.session-sidebar-header {
  position: relative;
  padding: 1rem 1rem 0.8rem;
  border-bottom: 1px solid hsl(var(--border));
}

.session-space-context {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 0.7rem;
  padding-right: 4.4rem;
}

.session-space-context > div {
  min-width: 0;
}

.session-space-context .kicker {
  margin: 0 0 0.18rem;
}

.session-space-context h2 {
  overflow: hidden;
  font-size: 0.98rem;
  font-weight: 660;
  letter-spacing: -0.02em;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.session-sidebar-header > p {
  margin: 0.7rem 0 0;
  color: hsl(var(--muted-foreground));
  font-size: 0.67rem;
  line-height: 1.45;
}

.session-heading-actions {
  position: absolute;
  top: 0.95rem;
  right: 0.8rem;
  display: flex;
  gap: 0.15rem;
}

.session-close-button {
  display: none;
}

.session-search {
  display: grid;
  grid-template-columns: 1rem minmax(0, 1fr);
  align-items: center;
  gap: 0.45rem;
  min-height: 2.35rem;
  margin: 0.75rem 0.75rem 0.45rem;
  padding: 0 0.7rem;
  color: hsl(var(--muted-foreground));
  background: hsl(var(--muted) / 0.42);
  border: 1px solid hsl(var(--border));
  border-radius: calc(var(--radius) - 0.12rem);
}

.session-search:focus-within {
  border-color: hsl(var(--ring) / 0.62);
  box-shadow: 0 0 0 2px hsl(var(--ring) / 0.12);
}

.session-search input {
  width: 100%;
  min-width: 0;
  color: hsl(var(--foreground));
  font: inherit;
  font-size: 0.72rem;
  background: transparent;
  border: 0;
  outline: 0;
}

.session-search input::placeholder {
  color: hsl(var(--muted-foreground));
}

.session-list {
  min-height: 0;
  padding: 0.15rem 0.55rem 1rem;
  overflow: hidden auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
}

.session-group-label {
  margin: 0.75rem 0.55rem 0.35rem;
  color: hsl(var(--muted-foreground));
  font-size: 0.57rem;
  font-weight: 700;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.session-item {
  position: relative;
  display: grid;
  grid-template-columns: 0.55rem minmax(0, 1fr) auto;
  gap: 0.55rem;
  width: 100%;
  min-height: 4.25rem;
  align-items: start;
  padding: 0.7rem 0.65rem;
  color: hsl(var(--foreground));
  text-align: left;
  background: transparent;
  border: 1px solid transparent;
  border-radius: calc(var(--radius) - 0.08rem);
  cursor: pointer;
}

.session-item:hover {
  background: hsl(var(--accent) / 0.55);
}

.session-item.active {
  background: hsl(var(--accent));
  border-color: hsl(var(--primary) / 0.17);
  box-shadow: inset 2px 0 hsl(var(--primary));
}

.session-item-copy {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 0.2rem;
}

.session-item-copy strong,
.session-item-copy small,
.session-item-copy span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.session-item-copy strong {
  font-size: 0.75rem;
  font-weight: 640;
}

.session-item-copy small {
  color: hsl(var(--muted-foreground));
  font-size: 0.62rem;
}

.session-item-copy span {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  color: hsl(var(--muted-foreground));
  font-size: 0.58rem;
}

.session-type {
  max-width: 6.5rem;
  padding: 0.12rem 0.32rem;
  color: hsl(var(--muted-foreground));
  background: hsl(var(--muted) / 0.65);
  border: 1px solid hsl(var(--border));
  border-radius: 999px;
  text-transform: uppercase;
}

.session-item time {
  color: hsl(var(--muted-foreground));
  font-size: 0.58rem;
  white-space: nowrap;
}

.session-status {
  display: inline-block;
  width: 0.45rem;
  min-width: 0.45rem;
  height: 0.45rem;
  margin-top: 0.28rem;
  border-radius: 999px;
}

.session-status.running { background: hsl(var(--success)); box-shadow: 0 0 0 3px hsl(var(--success) / 0.1); }
.session-status.waiting { background: hsl(var(--warning)); box-shadow: 0 0 0 3px hsl(var(--warning) / 0.1); }
.session-status.review { background: hsl(var(--info)); }
.session-status.quiet { background: hsl(var(--muted-foreground) / 0.55); }
.session-status.blocked { background: hsl(var(--destructive)); box-shadow: 0 0 0 3px hsl(var(--destructive) / 0.1); }
.session-status.verified { color: hsl(var(--success)); background: hsl(var(--success)); }

.session-empty {
  margin: 1rem 0.4rem;
  padding: 1.2rem 0.9rem;
  color: hsl(var(--muted-foreground));
  font-size: 0.7rem;
  line-height: 1.5;
  text-align: center;
  background: hsl(var(--muted) / 0.24);
  border: 1px dashed hsl(var(--border));
  border-radius: var(--radius);
}

.session-sidebar-footer {
  display: flex;
  min-height: 2.4rem;
  align-items: center;
  gap: 0.8rem;
  margin-top: auto;
  padding: 0 0.9rem;
  color: hsl(var(--muted-foreground));
  font-size: 0.56rem;
  border-top: 1px solid hsl(var(--border));
}

.session-sidebar-footer span {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.session-sidebar-footer .session-status {
  margin: 0;
}

/* Main work window */
.main-area {
  position: relative;
  grid-column: 3;
  min-width: 0;
  min-height: 0;
  overflow: auto;
}

.topbar-leading {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 0.65rem;
}

.topbar-leading > div:last-child {
  min-width: 0;
}

.pane-toggle-group {
  display: none;
  gap: 0.2rem;
}

.pane-toggle {
  width: 2.1rem;
  min-width: 2.1rem;
  height: 2.1rem;
  background: hsl(var(--muted) / 0.45);
  border-color: hsl(var(--border));
}

.pane-backdrop,
.mobile-bottom-nav {
  display: none;
}

.project-dialog {
  width: min(28rem, calc(100vw - 2rem));
  padding: 1.5rem;
}

.project-dialog form,
.project-dialog label {
  display: grid;
  gap: 0.45rem;
}

.project-dialog form {
  gap: 1rem;
  margin-top: 1.25rem;
}

.project-dialog label {
  color: hsl(var(--muted-foreground));
  font-size: 0.68rem;
  font-weight: 650;
}

.project-dialog input {
  width: 100%;
  height: 2.65rem;
  padding: 0 0.75rem;
  color: hsl(var(--foreground));
  background: hsl(var(--background));
  border: 1px solid hsl(var(--input));
  border-radius: calc(var(--radius) - 0.12rem);
  outline: 0;
}

.project-dialog input:focus {
  border-color: hsl(var(--ring));
  box-shadow: 0 0 0 2px hsl(var(--ring) / 0.16);
}

.project-dialog .dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.6rem;
  margin-top: 0.35rem;
}

/* A second permanent column reduces the main surface; stack dense internal
 * inspector layouts before they can create horizontal overflow. */
@media (max-width: 1360px) {
  .task-layout,
  .project-grid,
  .memory-layout,
  .diff-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .file-tree {
    border-right: 0;
    border-bottom: 1px solid hsl(var(--border));
  }
}

@media (max-width: 1180px) {
  :root {
    --session-sidebar-width: 16rem;
  }

  body:not(.project-rail-expanded) {
    --project-rail-width: var(--project-rail-collapsed-width);
  }

  body:not(.project-rail-expanded) .rail-label {
    display: none !important;
  }

  body:not(.project-rail-expanded) .rail-brand {
    grid-template-columns: 1fr;
    justify-items: center;
  }

  body:not(.project-rail-expanded) .rail-brand .brand-mark {
    display: none;
  }

  body:not(.project-rail-expanded) .rail-collapse-button {
    transform: rotate(180deg);
  }

  body:not(.project-rail-expanded) .project-rail .nav-label,
  body:not(.project-rail-expanded) .rail-section-heading {
    min-height: 0.45rem;
    margin: 0;
  }

  body:not(.project-rail-expanded) .project-rail .nav-item,
  body:not(.project-rail-expanded) .space-nav-item {
    min-height: 2.65rem;
    justify-content: center;
    padding-inline: 0.25rem;
  }

  body:not(.project-rail-expanded) .project-rail .nav-item > span:first-child,
  body:not(.project-rail-expanded) .space-glyph {
    width: 1.9rem;
    min-width: 1.9rem;
    height: 1.9rem;
  }

  body:not(.project-rail-expanded) .project-rail .nav-item em,
  body:not(.project-rail-expanded) .space-state {
    position: absolute;
    top: 0.12rem;
    right: 0.15rem;
    margin: 0;
  }

  body:not(.project-rail-expanded) .project-rail .sidebar-foot {
    grid-template-columns: 1fr;
    justify-items: center;
  }
}

/* Sessions becomes a drawer on narrow desktop/tablet. Spaces remains a rail. */
@media (max-width: 900px) {
  .app-shell {
    grid-template-columns: var(--project-rail-width) minmax(0, 1fr);
  }

  .session-sidebar {
    position: fixed;
    inset: var(--shell-top) auto 0 var(--project-rail-width);
    z-index: 60;
    width: min(20rem, calc(100vw - var(--project-rail-width)));
    transform: translateX(calc(-100% - var(--project-rail-width)));
    box-shadow: 18px 0 50px rgb(0 0 0 / 0.36);
    transition: transform 180ms ease;
  }

  body.sessions-pane-open .session-sidebar {
    transform: translateX(0);
  }

  .session-close-button,
  .pane-toggle-group {
    display: flex;
  }

  .main-area {
    grid-column: 2;
  }

  .pane-backdrop {
    position: fixed;
    inset: var(--shell-top) 0 0;
    z-index: 55;
    display: block;
    opacity: 0;
    pointer-events: none;
    background: rgb(0 0 0 / 0.48);
    border: 0;
    backdrop-filter: blur(2px);
    transition: opacity 180ms ease;
  }

  body.sessions-pane-open .pane-backdrop,
  body.projects-pane-open .pane-backdrop,
  body.drawer-gesture-active .pane-backdrop {
    opacity: var(--drawer-scrim-opacity, 1);
    pointer-events: auto;
  }

  .approval-layout,
  .notification-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .approval-list,
  .notification-list {
    border-right: 0;
    border-bottom: 1px solid hsl(var(--border));
  }
}

@media (max-width: 760px) {
  :root {
    --shell-top: 1.8rem;
    --project-rail-width: 0rem;
  }

  html,
  body {
    overscroll-behavior-x: none;
  }

  button,
  [role='button'] {
    -webkit-tap-highlight-color: transparent;
  }

  body.project-rail-expanded,
  body.project-rail-collapsed {
    --project-rail-width: 0rem;
  }

  .app-shell {
    top: var(--shell-top);
    grid-template-columns: minmax(0, 1fr);
  }

  .app-shell .project-rail,
  .session-sidebar {
    position: fixed;
    inset: var(--shell-top) auto calc(4rem + env(safe-area-inset-bottom, 0px)) 0;
    width: min(20rem, 88vw);
    height: auto;
    transform: translate3d(-105%, 0, 0);
    transition: transform 220ms cubic-bezier(0.2, 0.78, 0.2, 1);
    touch-action: none;
    overscroll-behavior: contain;
    will-change: transform;
  }

  .app-shell .project-rail *,
  .session-sidebar * {
    touch-action: none;
  }

  .app-shell .project-rail.drawer-dragging,
  .session-sidebar.drawer-dragging {
    transition: none !important;
  }

  .app-shell .project-rail {
    z-index: 72;
    padding-bottom: calc(0.7rem + env(safe-area-inset-bottom, 0px));
    border-right: 1px solid hsl(var(--border));
    border-top: 0;
    box-shadow: 18px 0 50px rgb(0 0 0 / 0.4);
  }

  .session-sidebar {
    z-index: 73;
  }

  body.projects-pane-open .project-rail,
  body.sessions-pane-open .session-sidebar {
    transform: translate3d(0, 0, 0);
  }

  .rail-mobile-close-button,
  .session-back-button {
    display: inline-grid;
  }

  .rail-mobile-close-button,
  .session-back-button,
  .session-add-button,
  .session-close-button {
    width: 2.5rem;
    height: 2.5rem;
    min-width: 2.5rem;
  }

  .session-back-button {
    margin-left: -0.35rem;
    font-size: 1.45rem;
    line-height: 1;
  }

  .session-space-context {
    gap: 0.48rem;
    padding-right: 5.4rem;
  }

  .session-heading-actions {
    width: 5.2rem;
  }

  .drawer-drag-edge {
    position: absolute;
    top: 0;
    right: -0.2rem;
    bottom: 0;
    display: block;
    width: 0.7rem;
    pointer-events: none;
  }

  .drawer-drag-edge::after {
    position: absolute;
    top: 50%;
    right: 0.08rem;
    width: 0.16rem;
    height: 2.6rem;
    content: '';
    opacity: 0;
    background: hsl(var(--foreground) / 0.22);
    border-radius: 999px;
    transform: translateY(-50%);
    transition: opacity 120ms ease;
  }

  body.drawer-gesture-active .drawer-dragging .drawer-drag-edge::after {
    opacity: 1;
  }

  body.drawer-gesture-active .pane-backdrop {
    transition: none;
  }

  .drawer-edge-swipe-zone {
    position: fixed;
    inset: var(--shell-top) auto calc(4rem + env(safe-area-inset-bottom, 0px)) 0;
    z-index: 67;
    display: block;
    width: 1.75rem;
    touch-action: none;
  }

  body.projects-pane-open .drawer-edge-swipe-zone,
  body.sessions-pane-open .drawer-edge-swipe-zone {
    pointer-events: none;
  }

  .app-shell .project-rail .brand,
  .app-shell .project-rail .sidebar-foot {
    display: grid;
  }

  body.project-rail-collapsed .app-shell .project-rail .sidebar-foot,
  .app-shell .project-rail .sidebar-foot {
    grid-template-columns: 2.35rem 2.35rem minmax(0, 1fr);
    align-items: center;
    justify-items: stretch;
    gap: 0.45rem;
  }

  .app-shell .project-rail .sidebar-foot .runtime-state {
    min-width: 0;
  }

  .app-shell .project-rail nav,
  .session-list {
    scrollbar-width: none;
  }

  .app-shell .project-rail nav::-webkit-scrollbar,
  .session-list::-webkit-scrollbar {
    display: none;
  }

  .app-shell .project-rail nav {
    display: flex;
    width: auto;
    height: auto;
    overflow-y: auto;
  }

  .app-shell .project-rail .nav-item,
  .app-shell .space-nav-item {
    display: flex !important;
    width: 100%;
    min-width: 0;
    height: auto;
    min-height: 2.7rem;
    flex-direction: row;
    padding: 0.4rem 0.5rem;
    font-size: inherit;
  }

  .app-shell .project-rail .nav-item > span,
  .app-shell .project-rail .space-glyph {
    font-size: 0.82rem;
  }

  .app-shell .project-rail .rail-label {
    display: flex !important;
  }

  .app-shell .project-rail .nav-label.rail-label {
    display: block !important;
  }

  .app-shell .project-rail .rail-section-heading {
    min-height: 1.75rem;
    margin: 0;
  }

  .app-shell .project-rail .rail-brand {
    grid-template-columns: 2rem minmax(0, 1fr) 2rem;
    justify-items: stretch;
  }

  .app-shell .project-rail .rail-brand .brand-mark {
    display: grid;
  }

  .app-shell .project-rail .rail-collapse-button {
    display: none;
  }

  .app-shell .project-rail .nav-item em,
  .app-shell .project-rail .space-state {
    position: relative;
    inset: auto;
    margin-left: auto;
  }

  .app-shell .project-rail .sidebar-foot {
    grid-template-columns: 2rem 2rem minmax(0, 1fr);
  }

  .main-area {
    grid-column: 1;
    padding-bottom: calc(4.25rem + env(safe-area-inset-bottom, 0px));
  }

  .topbar {
    gap: 0.5rem;
  }

  .topbar-leading {
    flex: 1;
  }

  .topbar .top-actions .primary-button,
  .topbar .top-actions [data-action="command"] {
    display: none;
  }

  .pane-backdrop {
    inset: var(--shell-top) 0 0;
    z-index: 68;
  }

  .mobile-bottom-nav {
    position: fixed;
    inset: auto 0 0;
    z-index: 65;
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    min-height: calc(4rem + env(safe-area-inset-bottom, 0px));
    padding: 0.35rem 0.45rem max(0.35rem, env(safe-area-inset-bottom, 0px));
    background: hsl(var(--card) / 0.95);
    border-top: 1px solid hsl(var(--border));
    box-shadow: 0 -16px 40px rgb(0 0 0 / 0.24);
    backdrop-filter: blur(22px) saturate(1.2);
  }

  .mobile-bottom-nav button {
    position: relative;
    display: flex;
    min-width: 0;
    min-height: 3.2rem;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 0.15rem;
    color: hsl(var(--muted-foreground));
    background: transparent;
    border: 1px solid transparent;
    border-radius: calc(var(--radius) - 0.05rem);
    transition: color 140ms ease, background-color 140ms ease, transform 90ms ease;
  }

  .mobile-bottom-nav button:active {
    transform: scale(0.96);
  }

  .mobile-bottom-nav button.active {
    color: hsl(var(--foreground));
    background: hsl(var(--accent));
    border-color: hsl(var(--primary) / 0.18);
  }

  .mobile-bottom-nav button span {
    font-size: 0.92rem;
  }

  .mobile-bottom-nav button small {
    overflow: hidden;
    max-width: 100%;
    font-size: 0.55rem;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .mobile-bottom-nav button em {
    position: absolute;
    top: 0.1rem;
    right: 18%;
    display: grid;
    min-width: 1rem;
    height: 1rem;
    place-items: center;
    color: hsl(var(--destructive-foreground));
    font-size: 0.52rem;
    font-style: normal;
    background: hsl(var(--destructive));
    border-radius: 999px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .app-shell,
  .project-rail,
  .session-sidebar,
  .pane-backdrop,
  .drawer-drag-edge::after,
  .mobile-bottom-nav button {
    transition: none !important;
  }
}