/* ============================================================================
   GalleryOS — Sidebar navigation (single source of truth)
   Coupled to --gos-breakpoint-lg (1024px) in gos-ui.css / gos-config.js
   ============================================================================ */

:root {
  --gos-nav-width-expanded: 17rem;
  --gos-nav-width-rail: 4.25rem;
  --gos-nav-rail-icon-size: 2.5rem;
  --gos-nav-item-height: 2.375rem;
  --gos-nav-group-gap: 0.5rem;
}

/* --- Sidebar shell (nav column) --- */
.gos-sidebar {
  --gos-sidebar-accent: var(--gos-accent);
  display: flex;
  flex-direction: column;
  position: relative;
  flex-shrink: 0;
  min-height: 0;
  height: 100%;
  max-height: 100%;
  overflow: hidden;
  color: var(--gos-text-primary);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--gos-surface-muted) 35%, transparent) 0%, transparent 28%),
    var(--gos-bg);
  box-shadow: inset -1px 0 0 var(--gos-border);
}

#mobile-sidebar.gos-sidebar {
  position: fixed;
  width: var(--gos-nav-width-expanded, 17rem);
  max-width: min(100%, 18rem);
  height: 100dvh;
  max-height: 100dvh;
  will-change: transform;
  transition: transform var(--gos-duration-medium, 360ms) var(--gos-ease-spring, cubic-bezier(0.22, 1, 0.36, 1));
}

#mobile-sidebar .gos-sidebar__body {
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

#mobile-sidebar:not(.gos-sidebar--open) {
  visibility: hidden;
}

#mobile-sidebar.gos-sidebar--open {
  visibility: visible;
}

.gos-sidebar__pulse {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 2;
  pointer-events: none;
  background: linear-gradient(
    90deg,
    transparent 0%,
    color-mix(in srgb, var(--gos-sidebar-accent) 55%, transparent) 18%,
    var(--gos-sidebar-accent) 50%,
    color-mix(in srgb, var(--gos-sidebar-accent) 55%, transparent) 82%,
    transparent 100%
  );
  opacity: 0.85;
}

@keyframes gos-sidebar-pulse-slide-in {
  from { transform: scaleX(0); opacity: 0; }
  to { transform: scaleX(1); opacity: 0.85; }
}

#mobile-sidebar .gos-sidebar__pulse {
  transform: scaleX(0);
  transform-origin: left center;
  opacity: 0;
}

#mobile-sidebar.gos-sidebar--open .gos-sidebar__pulse {
  animation: gos-sidebar-pulse-slide-in var(--gos-duration-medium, 360ms) var(--gos-ease-out, ease) forwards;
  animation-delay: 0.15s;
}

@media (prefers-reduced-motion: reduce) {
  #mobile-sidebar .gos-sidebar__pulse {
    transform: none;
    opacity: 0.85;
  }
  #mobile-sidebar.gos-sidebar--open .gos-sidebar__pulse {
    animation: none;
  }
}

.gos-sidebar__head {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  min-height: 3.5rem;
  padding: 0 0.875rem;
  border-bottom: 1px solid var(--gos-border);
  flex-shrink: 0;
}

.gos-sidebar__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  min-width: 0;
  text-decoration: none;
  color: inherit;
}

.gos-sidebar__brand-mark {
  width: 1.375rem;
  height: 1.375rem;
  border-radius: 6px;
  display: grid;
  place-items: center;
  background: var(--gos-text-primary);
  color: var(--gos-bg);
  flex-shrink: 0;
}

.dark .gos-sidebar__brand-mark {
  background: #fff;
  color: #000;
}

.gos-sidebar__brand-text {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--gos-text-primary);
}

.gos-sidebar__brand-muted {
  color: var(--gos-text-secondary);
}

.gos-sidebar__toolbar {
  display: flex;
  align-items: center;
  gap: 0.125rem;
  flex-shrink: 0;
}

.gos-sidebar__icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  padding: 0;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--gos-text-secondary);
  cursor: pointer;
  transition: background var(--gos-duration-fast, 180ms) var(--gos-ease-out, ease),
              color var(--gos-duration-fast, 180ms) var(--gos-ease-out, ease);
}

.gos-sidebar__icon-btn:hover {
  background: var(--gos-hover-fill);
  color: var(--gos-text-primary);
}

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

.gos-sidebar .gos-ws-switcher-mount {
  flex-shrink: 0;
  border-bottom: 1px solid var(--gos-border);
}

.gos-sidebar__footer {
  flex-shrink: 0;
  border-top: 1px solid var(--gos-border);
  padding: 0.25rem;
  padding-bottom: max(0.25rem, env(safe-area-inset-bottom));
  background: color-mix(in srgb, var(--gos-surface-muted) 40%, transparent);
}

/* Scrollable nav list — desktop + mobile */
.gos-sidebar .gos-nav {
  flex: 1 1 auto;
  min-height: 0;
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  touch-action: pan-y;
  scrollbar-width: thin;
  scrollbar-color: color-mix(in srgb, var(--gos-text-primary) 12%, transparent) transparent;
  box-shadow: inset 0 1px 0 color-mix(in srgb, var(--gos-border) 50%, transparent);
}

.gos-sidebar .gos-nav::-webkit-scrollbar {
  width: 5px;
}

.gos-sidebar .gos-nav::-webkit-scrollbar-thumb {
  border-radius: 999px;
  background: color-mix(in srgb, var(--gos-text-primary) 14%, transparent);
}

@media (min-width: 1024px) {
  .gos-sidebar--desktop .gos-sidebar__body {
    min-width: 0;
  }
}

/* --- Nav list --- */
.gos-nav {
  padding: 0.625rem 0.625rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* Zones — structural rhythm */
.gos-nav-zone + .gos-nav-zone {
  margin-top: 0.625rem;
  padding-top: 0.625rem;
  border-top: 1px solid color-mix(in srgb, var(--gos-border) 85%, transparent);
}

.gos-nav-zone__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0 0.375rem 0.4375rem;
}

.gos-nav-zone__label {
  padding: 0;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gos-text-soft);
  user-select: none;
}

.gos-nav-workspace-toolbar {
  display: none;
}

.gos-nav-zone__body {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.gos-nav-zone[data-nav-zone="quick"] .gos-nav-zone__body {
  gap: 0.375rem;
}

.gos-nav-zone[data-nav-zone="workspace"] .gos-nav-zone__body {
  gap: 0;
  padding: 0.125rem;
  border-radius: 12px;
  border: 1px solid color-mix(in srgb, var(--gos-border) 80%, transparent);
  background: color-mix(in srgb, var(--gos-surface) 60%, transparent);
  box-shadow:
    0 1px 0 color-mix(in srgb, #fff 35%, transparent) inset,
    0 1px 3px color-mix(in srgb, var(--gos-text-primary) 4%, transparent);
}

.dark .gos-nav-zone[data-nav-zone="workspace"] .gos-nav-zone__body {
  box-shadow:
    0 1px 0 color-mix(in srgb, #fff 5%, transparent) inset,
    0 2px 8px rgba(0, 0, 0, 0.18);
}

.gos-nav-zone[data-nav-zone="system"] .gos-nav-zone__body {
  gap: 0.125rem;
}

.gos-nav-zone[data-nav-zone="shortcuts"] .gos-nav-zone__body {
  gap: 0.25rem;
}

.gos-nav-jump-wrap {
  padding: 0;
  flex-shrink: 0;
}

.gos-nav-jump {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  width: 100%;
  min-height: 2.625rem;
  padding: 0.5625rem 0.75rem;
  border: 1px solid color-mix(in srgb, var(--gos-border) 90%, transparent);
  border-radius: 12px;
  background: color-mix(in srgb, var(--gos-surface) 88%, var(--gos-bg));
  color: var(--gos-text-secondary);
  font-size: 13px;
  font-weight: 500;
  font-family: inherit;
  text-align: left;
  cursor: pointer;
  box-shadow:
    0 1px 0 color-mix(in srgb, #fff 40%, transparent) inset,
    0 1px 2px color-mix(in srgb, var(--gos-text-primary) 4%, transparent);
  transition: background var(--gos-duration-fast, 180ms) var(--gos-ease-out, ease),
              border-color var(--gos-duration-fast, 180ms) var(--gos-ease-out, ease),
              color var(--gos-duration-fast, 180ms) var(--gos-ease-out, ease),
              box-shadow var(--gos-duration-fast, 180ms) var(--gos-ease-out, ease),
              transform var(--gos-duration-fast, 180ms) var(--gos-ease-out, ease);
}

.dark .gos-nav-jump {
  box-shadow:
    0 1px 0 color-mix(in srgb, #fff 6%, transparent) inset,
    0 1px 3px rgba(0, 0, 0, 0.2);
}

.gos-nav-jump .gos-nav-item__icon-wrap {
  background: color-mix(in srgb, var(--gos-accent) 10%, transparent);
  color: var(--gos-accent);
}

.gos-nav-jump:hover,
.gos-nav-jump:focus-visible {
  background: var(--gos-surface);
  border-color: color-mix(in srgb, var(--gos-accent) 22%, var(--gos-border));
  color: var(--gos-text-primary);
  box-shadow:
    0 0 0 3px color-mix(in srgb, var(--gos-accent) 10%, transparent),
    0 2px 8px color-mix(in srgb, var(--gos-accent) 8%, transparent);
  transform: translateY(-1px);
}

.gos-nav-jump__label {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.gos-nav-jump__kbd {
  flex-shrink: 0;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 0.125rem 0.375rem;
  border-radius: 5px;
  border: 1px solid var(--gos-border);
  background: var(--gos-surface-muted);
  color: var(--gos-text-soft);
  font-family: inherit;
  line-height: 1.3;
}

/* Home — primary destination */
.gos-nav-home {
  padding: 0;
  margin: 0;
  border: 0;
  flex-shrink: 0;
}

.gos-nav-home .gos-nav-item {
  min-height: 2.5rem;
  font-weight: 600;
}

.gos-nav-home .gos-nav-item__icon-wrap {
  background: color-mix(in srgb, var(--gos-sidebar-accent) 12%, transparent);
  color: var(--gos-accent);
}

.gos-nav-group {
  display: flex;
  flex-direction: column;
  border-radius: 12px;
  border: 1px solid transparent;
  transition: opacity var(--gos-duration-fast, 180ms) var(--gos-ease-out, ease),
              background var(--gos-duration-fast, 180ms) var(--gos-ease-out, ease),
              border-color var(--gos-duration-fast, 180ms) var(--gos-ease-out, ease),
              box-shadow var(--gos-duration-fast, 180ms) var(--gos-ease-out, ease);
}

.gos-nav-zone[data-nav-zone="workspace"] .gos-nav-group:not(.gos-nav-section) {
  background: transparent;
  border-color: transparent;
  box-shadow: none;
  border-radius: 0;
}

.gos-nav-zone[data-nav-zone="workspace"] .gos-nav-group:not(.gos-nav-section) + .gos-nav-group:not(.gos-nav-section) {
  border-top: 1px solid color-mix(in srgb, var(--gos-border) 65%, transparent);
}

.gos-nav-zone[data-nav-zone="workspace"] .gos-nav-group.is-active-group:not(.is-collapsed) {
  background: color-mix(in srgb, var(--gos-accent) 4%, transparent);
  border-color: transparent;
  box-shadow: none;
}

.gos-nav-group.is-active-group:not(.is-collapsed) {
  background: color-mix(in srgb, var(--gos-accent) 5%, var(--gos-surface));
  border-color: color-mix(in srgb, var(--gos-accent) 18%, var(--gos-border));
  box-shadow: 0 2px 10px color-mix(in srgb, var(--gos-accent) 6%, transparent);
}

.gos-nav-group.has-active-item.is-collapsed {
  border-color: color-mix(in srgb, var(--gos-accent) 20%, var(--gos-border));
}

.gos-nav-group.has-active-item.is-collapsed .gos-nav-group__header {
  color: var(--gos-text-primary);
}

.gos-nav-group.has-active-item.is-collapsed .gos-nav-group__icon-wrap {
  background: color-mix(in srgb, var(--gos-accent) 14%, transparent);
  color: var(--gos-accent);
}

.gos-nav-group[hidden] {
  display: none;
}

.gos-nav-group.is-hiding {
  opacity: 0;
  max-height: 0;
  overflow: hidden;
  pointer-events: none;
  margin-top: 0;
  margin-bottom: 0;
}

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

.gos-nav-group__header {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.625rem;
  width: 100%;
  min-height: 2.375rem;
  padding: 0.5rem 0.625rem;
  border: 0;
  background: transparent;
  border-radius: 11px;
  cursor: pointer;
  color: var(--gos-text-secondary, rgba(28, 28, 26, 0.62));
  font-family: inherit;
  transition: color var(--gos-duration-fast, 180ms) var(--gos-ease-out, ease),
              background var(--gos-duration-fast, 180ms) var(--gos-ease-out, ease);
}

.gos-nav-group__icon-wrap {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.625rem;
  height: 1.625rem;
  flex-shrink: 0;
  border-radius: 8px;
  background: color-mix(in srgb, var(--gos-text-primary) 5%, transparent);
  color: var(--gos-text-soft);
  transition: background var(--gos-duration-fast, 180ms) ease,
              color var(--gos-duration-fast, 180ms) ease,
              transform var(--gos-duration-fast, 180ms) ease;
}

.gos-nav-group__header-text {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.0625rem;
  text-align: left;
}

.gos-nav-group__active-hint {
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
  color: var(--gos-accent);
  line-height: 1.2;
}

.gos-nav-group__active-hint[hidden] {
  display: none;
}

.gos-nav-group__header:hover .gos-nav-group__icon-wrap,
.gos-nav-group.is-active-group .gos-nav-group__icon-wrap {
  background: color-mix(in srgb, var(--gos-accent) 12%, transparent);
  color: var(--gos-accent);
}

.gos-nav-group__header:hover {
  color: var(--gos-text-primary, #1C1C1A);
  background: color-mix(in srgb, var(--gos-hover-fill, rgba(28, 28, 26, 0.04)) 80%, transparent);
}

.gos-nav-group__header:focus-visible {
  background: var(--gos-hover-fill, rgba(28, 28, 26, 0.04));
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--gos-accent) 25%, transparent);
}

.dark .gos-nav-group__header {
  color: rgba(255, 255, 255, 0.62);
}

.dark .gos-nav-group__header:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
}

.gos-nav-group__rail-icon {
  display: none;
  flex-shrink: 0;
  color: var(--gos-text-soft, rgba(28, 28, 26, 0.5));
}

.gos-nav-group__label {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: -0.02em;
  text-transform: none;
  line-height: 1.25;
  color: var(--gos-text-primary);
}

.gos-nav-group__desc {
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
  color: var(--gos-text-soft);
  line-height: 1.2;
}

.gos-nav-group.is-collapsed .gos-nav-group__desc {
  display: none;
}

.gos-nav-group__count {
  flex-shrink: 0;
  min-width: 1.125rem;
  height: 1.125rem;
  padding: 0 0.3rem;
  border-radius: 999px;
  font-size: 9px;
  font-weight: 700;
  line-height: 1.125rem;
  text-align: center;
  letter-spacing: 0;
  text-transform: none;
  color: var(--gos-text-soft);
  background: color-mix(in srgb, var(--gos-text-primary) 6%, transparent);
  transition: opacity var(--gos-duration-fast, 180ms) ease,
              background var(--gos-duration-fast, 180ms) ease,
              color var(--gos-duration-fast, 180ms) ease;
}

.gos-nav-group:not(.is-collapsed) .gos-nav-group__count {
  opacity: 0.65;
}

.gos-nav-group.is-collapsed .gos-nav-group__count {
  background: color-mix(in srgb, var(--gos-accent) 12%, transparent);
  color: var(--gos-accent);
  opacity: 1;
}

.gos-nav-group__chevron-wrap {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.375rem;
  height: 1.375rem;
  flex-shrink: 0;
  border-radius: 6px;
  transition: background var(--gos-duration-fast, 180ms) ease;
}

.gos-nav-group__header:hover .gos-nav-group__chevron-wrap {
  background: color-mix(in srgb, var(--gos-text-primary) 5%, transparent);
}

.gos-nav-group__chevron {
  flex-shrink: 0;
  opacity: 0.55;
  color: var(--gos-text-soft);
  transition: transform var(--gos-duration-medium, 360ms) var(--gos-ease-spring, cubic-bezier(0.22, 1, 0.36, 1)),
              opacity var(--gos-duration-fast, 180ms) ease;
}

.gos-nav-group__header:hover .gos-nav-group__chevron {
  opacity: 0.9;
}

.gos-nav-group.is-collapsed .gos-nav-group__chevron {
  transform: rotate(-90deg);
}

.gos-nav-group__items {
  display: block;
}

.gos-nav-group__items[hidden] {
  display: none !important;
}

.gos-nav-group.is-collapsed .gos-nav-group__items {
  display: none;
}

.gos-nav-zone[data-nav-zone="workspace"] .gos-nav-group__items-inner {
  padding-left: 1.625rem;
  position: relative;
}

.gos-nav-zone[data-nav-zone="workspace"] .gos-nav-group__items-inner::before {
  content: '';
  position: absolute;
  left: 1.125rem;
  top: 0.25rem;
  bottom: 0.625rem;
  width: 1px;
  background: color-mix(in srgb, var(--gos-border) 85%, transparent);
  pointer-events: none;
}

.gos-nav-group__items-inner {
  min-height: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 0.1875rem;
  padding: 0.125rem 0.375rem 0.5rem 0.5rem;
}

.gos-nav-item__icon-wrap {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  flex-shrink: 0;
  border-radius: 8px;
  background: color-mix(in srgb, var(--gos-text-primary) 4%, transparent);
  color: var(--gos-text-soft);
  transition: background var(--gos-duration-fast, 180ms) ease,
              color var(--gos-duration-fast, 180ms) ease,
              transform var(--gos-duration-fast, 180ms) ease;
}

.gos-nav .nav-item.gos-nav-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.625rem;
  width: 100%;
  min-height: var(--gos-nav-item-height, 2.375rem);
  padding: 0.375rem 0.5rem 0.375rem 0.4375rem;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--gos-text-secondary, rgba(28, 28, 26, 0.62));
  font-size: 13px;
  font-weight: 500;
  letter-spacing: -0.015em;
  text-align: left;
  font-family: inherit;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--gos-duration-fast, 180ms) var(--gos-ease-out, ease),
              color var(--gos-duration-fast, 180ms) var(--gos-ease-out, ease),
              opacity var(--gos-duration-fast, 180ms) var(--gos-ease-out, ease),
              transform var(--gos-duration-fast, 180ms) var(--gos-ease-out, ease);
}

.gos-nav .nav-item.gos-nav-item[hidden] {
  display: none;
}

.gos-nav .nav-item.gos-nav-item.is-hiding {
  opacity: 0;
  max-height: 0;
  min-height: 0;
  padding-top: 0;
  padding-bottom: 0;
  margin: 0;
  overflow: hidden;
  pointer-events: none;
}

.dark .gos-nav .nav-item.gos-nav-item {
  color: rgba(255, 255, 255, 0.66);
}

.gos-nav-item__icon {
  flex-shrink: 0;
  color: inherit;
  transition: color var(--gos-duration-fast, 180ms) var(--gos-ease-out, ease);
}

.gos-nav-item__label {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.gos-nav .nav-item.gos-nav-item:hover {
  background: var(--gos-hover-fill, rgba(28, 28, 26, 0.04));
  color: var(--gos-text-primary, #1C1C1A);
}

.gos-nav .nav-item.gos-nav-item:hover .gos-nav-item__icon-wrap {
  background: color-mix(in srgb, var(--gos-text-primary) 7%, transparent);
  color: var(--gos-text-primary);
  transform: scale(1.04);
}

.gos-nav .nav-item.gos-nav-item.nav-item--active,
.gos-nav .nav-item.gos-nav-item[aria-current="page"] {
  background: color-mix(in srgb, var(--gos-accent) 11%, transparent) !important;
  color: var(--gos-accent);
  font-weight: 600;
  border-left: 0 !important;
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--gos-accent) 14%, transparent);
}

.gos-nav .nav-item.gos-nav-item.nav-item--active .gos-nav-item__icon-wrap,
.gos-nav .nav-item.gos-nav-item[aria-current="page"] .gos-nav-item__icon-wrap {
  background: color-mix(in srgb, var(--gos-accent) 16%, transparent);
  color: var(--gos-accent);
}

.gos-nav .nav-item.gos-nav-item.nav-item--active::before,
.gos-nav .nav-item.gos-nav-item[aria-current="page"]::before {
  display: none;
}

.gos-nav .nav-item.gos-nav-item.is-nav-pending {
  opacity: 0.82;
}

.gos-nav .nav-item.gos-nav-item.is-nav-pending::after {
  content: '';
  position: absolute;
  right: 0.65rem;
  top: 50%;
  width: 6px;
  height: 6px;
  margin-top: -3px;
  border-radius: 50%;
  background: var(--gos-accent);
  opacity: 0.85;
  animation: gos-nav-pending-pulse 1.1s ease-in-out infinite;
}

@keyframes gos-nav-pending-pulse {
  0%, 100% { opacity: 0.45; transform: scale(0.92); }
  50% { opacity: 1; transform: scale(1); }
}

@media (prefers-reduced-motion: reduce) {
  .gos-nav .nav-item.gos-nav-item.is-nav-pending::after {
    animation: none;
    opacity: 0.75;
  }
}

.dark .gos-nav .nav-item.gos-nav-item:hover {
  background: rgba(255, 255, 255, 0.07);
  color: #fff;
}

.dark .gos-nav .nav-item.gos-nav-item:hover .gos-nav-item__icon-wrap {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.dark .gos-nav .nav-item.gos-nav-item.nav-item--active,
.dark .gos-nav .nav-item.gos-nav-item[aria-current="page"] {
  background: color-mix(in srgb, var(--gos-accent) 20%, transparent) !important;
  color: color-mix(in srgb, var(--gos-accent) 75%, #fff);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--gos-accent) 24%, transparent);
}

.dark .gos-nav .nav-item.gos-nav-item.nav-item--active .gos-nav-item__icon-wrap,
.dark .gos-nav .nav-item.gos-nav-item[aria-current="page"] .gos-nav-item__icon-wrap {
  color: color-mix(in srgb, var(--gos-accent) 75%, #fff);
}

.gos-nav-badge {
  margin-left: auto;
  min-width: 1.125rem;
  height: 1.125rem;
  padding: 0 0.3rem;
  border-radius: 999px;
  font-size: 10px;
  font-weight: 700;
  line-height: 1.125rem;
  text-align: center;
  background: var(--gos-accent);
  color: #fff;
  flex-shrink: 0;
}

.gos-nav-badge--pulse {
  animation: gos-nav-badge-pulse 2s ease-in-out infinite;
}

.gos-nav-badge--due {
  background: var(--gos-warning, #d97706);
}

@keyframes gos-nav-badge-pulse {
  0%, 100% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--gos-accent) 40%, transparent); }
  50% { box-shadow: 0 0 0 4px color-mix(in srgb, var(--gos-accent) 0%, transparent); }
}

.gos-nav-badge[hidden] {
  display: none;
}

.gos-nav-settings {
  flex-shrink: 0;
  margin: 0;
  padding: 0;
  border: 0;
  transition: opacity var(--gos-duration-fast, 180ms) var(--gos-ease-out, ease);
}

.gos-nav-settings[hidden] {
  display: none;
}

.gos-nav-settings.is-hiding {
  opacity: 0;
  max-height: 0;
  overflow: hidden;
  pointer-events: none;
  padding: 0;
  margin: 0;
  border: 0;
}

.gos-sidebar-profile {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  padding: 0.625rem 0.75rem;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: inherit;
  font-family: inherit;
  text-align: left;
  cursor: pointer;
  transition: background var(--gos-duration-fast, 180ms) var(--gos-ease-out, ease);
}

.gos-sidebar-profile:hover {
  background: var(--gos-hover-fill);
}

.gos-sidebar-profile__avatar {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 999px;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  overflow: hidden;
  background: var(--gos-surface-muted);
  color: var(--gos-text-secondary);
}

.gos-sidebar-profile__avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.gos-sidebar-profile__meta {
  flex: 1;
  min-width: 0;
}

.gos-sidebar-profile__name {
  font-size: 12px;
  font-weight: 600;
  color: var(--gos-text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.gos-sidebar-profile__email {
  font-size: 10px;
  color: var(--gos-text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.gos-sidebar-profile__chevron {
  flex-shrink: 0;
  color: var(--gos-text-soft);
}

/* Dashboard activity scope (role lens) */
.gos-activity-scope {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-weight: 500;
  color: inherit;
}

.gos-activity-scope__icon {
  flex-shrink: 0;
  opacity: 0.7;
  color: var(--gos-text-soft, rgba(28, 28, 26, 0.5));
  vertical-align: middle;
}

.gos-activity-scope__text {
  vertical-align: middle;
}

.dark .gos-activity-scope__icon {
  color: rgba(255, 255, 255, 0.45);
}

body.gos-mobile-nav-open {
  overflow: hidden;
}

@media (min-width: 1024px) {
  /* ── Collapsed rail: icon-only sidebar ─────────────────────────────────── */

  .gos-sidebar--rail .gos-nav {
    padding: 0.625rem 0.5rem 1.125rem;
    gap: 0.25rem;
    align-items: stretch;
  }

  .gos-sidebar--rail .gos-nav-zone__label,
  .gos-sidebar--rail .gos-nav-zone__head,
  .gos-sidebar--rail .gos-nav-workspace-toolbar,
  .gos-sidebar--rail .gos-nav-jump__label,
  .gos-sidebar--rail .gos-nav-jump__kbd,
  .gos-sidebar--rail .gos-nav-group__icon-wrap,
  .gos-sidebar--rail .gos-nav-group__header-text,
  .gos-sidebar--rail .gos-nav-group__count,
  .gos-sidebar--rail .gos-nav-group__chevron-wrap,
  .gos-sidebar--rail .gos-nav-group__active-hint,
  .gos-sidebar--rail .gos-nav-item__label,
  .gos-sidebar--rail .gos-nav-settings__label {
    display: none !important;
  }

  .gos-sidebar--rail .gos-nav-zone + .gos-nav-zone {
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 0;
    position: relative;
  }

  .gos-sidebar--rail .gos-nav-zone + .gos-nav-zone::before {
    content: '';
    position: absolute;
    left: 22%;
    right: 22%;
    top: 0;
    height: 1px;
    background: linear-gradient(
      90deg,
      transparent,
      color-mix(in srgb, var(--gos-border) 95%, transparent) 50%,
      transparent
    );
  }

  .gos-sidebar--rail .gos-nav-zone__body {
    gap: 0.25rem;
  }

  .gos-sidebar--rail .gos-nav-zone[data-nav-zone="workspace"] .gos-nav-zone__body {
    gap: 0.25rem;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
  }

  .gos-sidebar--rail .gos-nav-zone[data-nav-zone="workspace"] .gos-nav-group + .gos-nav-group {
    border-top: 0;
  }

  .gos-sidebar--rail .gos-nav-zone[data-nav-zone="workspace"] .gos-nav-group.is-active-group:not(.is-collapsed),
  .gos-sidebar--rail .gos-nav-group.is-active-group:not(.is-collapsed) {
    background: transparent;
    border-color: transparent;
    box-shadow: none;
  }

  .gos-sidebar--rail .gos-nav-group {
    width: 100%;
    border: 0;
    background: transparent;
    box-shadow: none;
    border-radius: 0;
  }

  .gos-sidebar--rail .gos-nav-group.has-active-item.is-collapsed {
    border-color: transparent;
  }

  .gos-sidebar--rail .gos-nav-jump-wrap,
  .gos-sidebar--rail .gos-nav-home {
    display: flex;
    justify-content: center;
    width: 100%;
  }

  /* Shared rail tile base */
  .gos-sidebar--rail .gos-nav-jump,
  .gos-sidebar--rail .gos-nav-home .gos-nav-item,
  .gos-sidebar--rail .gos-nav-group__header,
  .gos-sidebar--rail .gos-nav .nav-item.gos-nav-item {
    position: relative;
    justify-content: center;
    align-items: center;
    width: var(--gos-nav-rail-icon-size, 2.5rem);
    min-height: var(--gos-nav-rail-icon-size, 2.5rem);
    height: var(--gos-nav-rail-icon-size, 2.5rem);
    padding: 0;
    margin: 0 auto;
    border-radius: 13px;
    gap: 0;
    transition: background var(--gos-duration-fast, 180ms) var(--gos-ease-out, ease),
                color var(--gos-duration-fast, 180ms) var(--gos-ease-out, ease),
                box-shadow var(--gos-duration-fast, 180ms) var(--gos-ease-out, ease),
                transform var(--gos-duration-fast, 180ms) var(--gos-ease-spring, cubic-bezier(0.22, 1, 0.36, 1)),
                border-color var(--gos-duration-fast, 180ms) ease;
  }

  /* Jump — primary portal tile */
  .gos-sidebar--rail .gos-nav-jump {
    border: 1px solid color-mix(in srgb, var(--gos-accent) 18%, var(--gos-border));
    background:
      linear-gradient(160deg, color-mix(in srgb, var(--gos-accent) 12%, transparent), transparent 70%),
      color-mix(in srgb, var(--gos-surface) 92%, var(--gos-bg));
    box-shadow:
      0 1px 0 color-mix(in srgb, #fff 50%, transparent) inset,
      0 2px 8px color-mix(in srgb, var(--gos-accent) 8%, transparent);
    transform: none;
  }

  .gos-sidebar--rail .gos-nav-jump:hover,
  .gos-sidebar--rail .gos-nav-jump:focus-visible {
    background:
      linear-gradient(160deg, color-mix(in srgb, var(--gos-accent) 18%, transparent), transparent 70%),
      var(--gos-surface);
    border-color: color-mix(in srgb, var(--gos-accent) 32%, var(--gos-border));
    box-shadow:
      0 0 0 3px color-mix(in srgb, var(--gos-accent) 12%, transparent),
      0 4px 14px color-mix(in srgb, var(--gos-accent) 14%, transparent);
    transform: translateY(-1px);
  }

  .gos-sidebar--rail .gos-nav-jump .gos-nav-item__icon-wrap {
    width: 1.5rem;
    height: 1.5rem;
    background: transparent;
    color: var(--gos-accent);
  }

  .gos-sidebar--rail .gos-nav-jump:hover .gos-nav-item__icon-wrap,
  .gos-sidebar--rail .gos-nav-jump:focus-visible .gos-nav-item__icon-wrap {
    color: var(--gos-accent);
    transform: scale(1.08);
  }

  /* Home */
  .gos-sidebar--rail .gos-nav-home .gos-nav-item {
    background: transparent;
    box-shadow: none;
  }

  .gos-sidebar--rail .gos-nav-home .gos-nav-item:hover {
    background: color-mix(in srgb, var(--gos-text-primary) 6%, transparent);
    transform: translateY(-1px);
  }

  .gos-sidebar--rail .gos-nav-home .gos-nav-item__icon-wrap {
    width: 1.5rem;
    height: 1.5rem;
    background: transparent;
    transform: none;
    color: var(--gos-text-secondary);
  }

  .gos-sidebar--rail .gos-nav-home .gos-nav-item:hover .gos-nav-item__icon-wrap {
    color: var(--gos-text-primary);
  }

  .gos-sidebar--rail .gos-nav-home .gos-nav-item.nav-item--active,
  .gos-sidebar--rail .gos-nav-home .gos-nav-item[aria-current="page"] {
    background: color-mix(in srgb, var(--gos-accent) 14%, transparent) !important;
    box-shadow:
      inset 0 0 0 1px color-mix(in srgb, var(--gos-accent) 22%, transparent),
      0 4px 14px color-mix(in srgb, var(--gos-accent) 10%, transparent);
  }

  .gos-sidebar--rail .gos-nav-home .gos-nav-item.nav-item--active .gos-nav-item__icon-wrap,
  .gos-sidebar--rail .gos-nav-home .gos-nav-item[aria-current="page"] .gos-nav-item__icon-wrap {
    background: transparent;
    color: var(--gos-accent);
  }

  /* Group headers */
  .gos-sidebar--rail .gos-nav-group__header {
    background: transparent;
  }

  .gos-sidebar--rail .gos-nav-group__header::before {
    content: '';
    position: absolute;
    left: -0.5rem;
    top: 50%;
    width: 3px;
    height: 0;
    margin-top: 0;
    border-radius: 0 3px 3px 0;
    background: linear-gradient(180deg, color-mix(in srgb, var(--gos-accent) 70%, #fff), var(--gos-accent));
    opacity: 0;
    transform: translateY(-50%);
    transition: opacity var(--gos-duration-fast, 180ms) ease,
                height var(--gos-duration-fast, 180ms) var(--gos-ease-spring, cubic-bezier(0.22, 1, 0.36, 1));
  }

  .gos-sidebar--rail .gos-nav-group.has-active-item .gos-nav-group__header::before,
  .gos-sidebar--rail .gos-nav-group.is-rail-open .gos-nav-group__header::before {
    opacity: 1;
    height: 1.125rem;
  }

  .gos-sidebar--rail .gos-nav-group__header:hover {
    background: color-mix(in srgb, var(--gos-text-primary) 6%, transparent);
    transform: translateY(-1px);
  }

  .gos-sidebar--rail .gos-nav-group.has-active-item .gos-nav-group__header,
  .gos-sidebar--rail .gos-nav-group.is-rail-open .gos-nav-group__header {
    background: color-mix(in srgb, var(--gos-accent) 14%, transparent);
    color: var(--gos-accent);
    box-shadow:
      inset 0 0 0 1px color-mix(in srgb, var(--gos-accent) 20%, transparent),
      0 4px 14px color-mix(in srgb, var(--gos-accent) 10%, transparent);
  }

  .gos-sidebar--rail .gos-nav-group.is-rail-open .gos-nav-group__header {
    background: color-mix(in srgb, var(--gos-accent) 18%, transparent);
    box-shadow:
      inset 0 0 0 1px color-mix(in srgb, var(--gos-accent) 28%, transparent),
      0 0 0 3px color-mix(in srgb, var(--gos-accent) 10%, transparent);
  }

  .gos-sidebar--rail .gos-nav-group__rail-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.5rem;
    height: 1.5rem;
    flex-shrink: 0;
    color: var(--gos-text-secondary);
    transition: color var(--gos-duration-fast, 180ms) ease,
                transform var(--gos-duration-fast, 180ms) var(--gos-ease-spring, cubic-bezier(0.22, 1, 0.36, 1));
  }

  .gos-sidebar--rail .gos-nav-group__badge {
    position: absolute;
    top: 4px;
    right: 4px;
    margin: 0;
    min-width: 0.5rem;
    width: auto;
    max-width: 1rem;
    height: 0.5rem;
    padding: 0 0.125rem;
    font-size: 0;
    line-height: 0;
    overflow: hidden;
    border-radius: 999px;
    background: var(--gos-accent);
    box-shadow: 0 0 0 2px var(--gos-bg);
  }

  .gos-sidebar--rail .gos-nav-group__badge[hidden] {
    display: none !important;
  }

  .gos-sidebar--rail .gos-nav-group__header:hover .gos-nav-group__rail-icon,
  .gos-sidebar--rail .gos-nav-group.has-active-item .gos-nav-group__rail-icon,
  .gos-sidebar--rail .gos-nav-group.is-rail-open .gos-nav-group__rail-icon {
    color: var(--gos-accent);
    transform: scale(1.08);
  }

  .gos-sidebar--rail .gos-nav-group__items {
    display: none;
  }

  .gos-sidebar--rail .gos-nav-section[data-group="__pinned"],
  .gos-sidebar--rail .gos-nav-section[data-group="__recents"],
  .gos-sidebar--rail .gos-nav-section[data-group="__more"] {
    display: none;
  }

  .gos-sidebar--rail .gos-nav .nav-item.gos-nav-item {
    box-shadow: none;
  }

  .gos-sidebar--rail .gos-nav .nav-item.gos-nav-item:hover {
    background: color-mix(in srgb, var(--gos-text-primary) 6%, transparent);
    transform: translateY(-1px);
  }

  .gos-sidebar--rail .gos-nav .nav-item.gos-nav-item .gos-nav-item__icon-wrap {
    width: 1.5rem;
    height: 1.5rem;
    background: transparent;
    transform: none;
  }

  .gos-sidebar--rail .gos-nav-settings__items-inner .nav-item {
    justify-content: center;
  }

  .gos-sidebar--rail .gos-nav-badge {
    position: absolute;
    top: 5px;
    right: 5px;
    margin-left: 0;
    min-width: 0.5rem;
    width: 0.5rem;
    height: 0.5rem;
    padding: 0;
    font-size: 0;
    border-radius: 999px;
    overflow: hidden;
    box-shadow: 0 0 0 2px var(--gos-bg);
  }

  /* Rail tooltips are portaled via JS (.gos-nav-rail-tip) — disable clipped CSS tips */
  .gos-sidebar--rail [data-gos-tooltip]:hover::after,
  .gos-sidebar--rail [data-gos-tooltip]:focus-visible::after,
  .gos-sidebar--rail [data-gos-tooltip]:hover::before,
  .gos-sidebar--rail [data-gos-tooltip]:focus-visible::before {
    content: none !important;
    display: none !important;
  }
}

/* Portaled rail tooltip (escapes sidebar overflow) */
.gos-nav-rail-tip {
  position: fixed;
  z-index: 90;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4375rem 0.75rem;
  border-radius: 10px;
  background: color-mix(in srgb, var(--gos-text-primary) 94%, #000);
  color: var(--gos-bg, #fff);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.25;
  white-space: nowrap;
  pointer-events: none;
  box-shadow:
    0 10px 28px rgba(0, 0, 0, 0.18),
    0 0 0 1px color-mix(in srgb, var(--gos-text-primary) 10%, transparent);
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity var(--gos-duration-fast, 180ms) var(--gos-ease-out, ease),
              transform var(--gos-duration-fast, 180ms) var(--gos-ease-spring, cubic-bezier(0.22, 1, 0.36, 1));
}

.gos-nav-rail-tip.is-visible {
  opacity: 1;
  transform: none;
}

.gos-nav-rail-tip[hidden] {
  display: none !important;
}

.gos-nav-rail-tip__kbd {
  display: inline-flex;
  align-items: center;
  padding: 0.1rem 0.375rem;
  border-radius: 5px;
  border: 1px solid color-mix(in srgb, var(--gos-bg) 28%, transparent);
  background: color-mix(in srgb, var(--gos-bg) 14%, transparent);
  color: inherit;
  font-size: 10px;
  font-weight: 600;
  font-family: inherit;
  letter-spacing: 0.01em;
  opacity: 0.85;
}

.gos-nav-rail-tip__kbd[hidden] {
  display: none !important;
}

.gos-nav-rail-tip__arrow {
  position: absolute;
  left: -5px;
  width: 0;
  height: 0;
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  border-right: 6px solid color-mix(in srgb, var(--gos-text-primary) 94%, #000);
}

.gos-nav-rail-tip.is-left .gos-nav-rail-tip__arrow {
  left: auto;
  right: -5px;
  border-right: 0;
  border-left: 6px solid color-mix(in srgb, var(--gos-text-primary) 94%, #000);
}

.dark .gos-nav-rail-tip {
  background: #fff;
  color: #1C1C1A;
  box-shadow:
    0 12px 32px rgba(0, 0, 0, 0.4),
    0 0 0 1px rgba(255, 255, 255, 0.1);
}

.dark .gos-nav-rail-tip__arrow {
  border-right-color: #fff;
}

.dark .gos-nav-rail-tip.is-left .gos-nav-rail-tip__arrow {
  border-left-color: #fff;
}

.dark .gos-nav-rail-tip__kbd {
  border-color: rgba(28, 28, 26, 0.14);
  background: rgba(28, 28, 26, 0.06);
}

@media (prefers-reduced-motion: reduce) {
  .gos-nav-rail-tip {
    transition: none;
    transform: none;
  }
}

/* Rail pillar flyout */
.gos-nav-rail-flyout {
  position: fixed;
  z-index: 70;
  width: 248px;
  max-height: min(72vh, 460px);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--gos-surface) 96%, #fff) 0%, var(--gos-surface) 100%);
  border: 1px solid color-mix(in srgb, var(--gos-border) 90%, transparent);
  border-radius: 16px;
  backdrop-filter: blur(16px) saturate(1.1);
  -webkit-backdrop-filter: blur(16px) saturate(1.1);
  box-shadow:
    0 20px 56px rgba(0, 0, 0, 0.16),
    0 4px 16px rgba(0, 0, 0, 0.06),
    0 0 0 1px color-mix(in srgb, var(--gos-text-primary) 3%, transparent);
  opacity: 0;
  transform: translateX(-10px) scale(0.97);
  transform-origin: left center;
  transition: opacity var(--gos-duration-fast, 180ms) var(--gos-ease-out, ease),
              transform var(--gos-duration-fast, 180ms) var(--gos-ease-spring, cubic-bezier(0.22, 1, 0.36, 1));
  pointer-events: none;
}

.dark .gos-nav-rail-flyout {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.05) 0%, var(--gos-surface) 40%);
  box-shadow:
    0 24px 64px rgba(0, 0, 0, 0.55),
    0 0 0 1px rgba(255, 255, 255, 0.06);
}

.gos-nav-rail-flyout.is-open {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}

.gos-nav-rail-flyout[hidden] {
  display: none !important;
}

.gos-nav-rail-flyout__bridge {
  position: absolute;
  left: -14px;
  top: var(--gos-rail-flyout-bridge-top, 18px);
  width: 14px;
  height: 36px;
  pointer-events: auto;
}

.gos-nav-rail-flyout__bridge::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 50%;
  width: 10px;
  height: 10px;
  margin-top: -5px;
  background: var(--gos-surface);
  border-left: 1px solid color-mix(in srgb, var(--gos-border) 90%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--gos-border) 90%, transparent);
  transform: rotate(45deg);
}

.gos-nav-rail-flyout__head {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.75rem 0.875rem 0.625rem;
  border-bottom: 1px solid color-mix(in srgb, var(--gos-border) 80%, transparent);
}

.gos-nav-rail-flyout__head-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 8px;
  flex-shrink: 0;
  background: color-mix(in srgb, var(--gos-accent) 12%, transparent);
  color: var(--gos-accent);
}

.gos-nav-rail-flyout__head-text {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.0625rem;
}

.gos-nav-rail-flyout__head-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--gos-text-primary);
  line-height: 1.2;
}

.gos-nav-rail-flyout__head-desc {
  font-size: 10px;
  font-weight: 500;
  color: var(--gos-text-soft);
  line-height: 1.25;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.gos-nav-rail-flyout__head-desc:empty {
  display: none;
}

.gos-nav-rail-flyout__items {
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 0.4375rem;
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
  scrollbar-width: thin;
  scrollbar-color: color-mix(in srgb, var(--gos-text-primary) 12%, transparent) transparent;
}

.gos-nav-rail-flyout__item {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  width: 100%;
  min-height: 2.375rem;
  padding: 0.4375rem 0.5625rem;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--gos-text-secondary);
  font-size: 13px;
  font-weight: 500;
  font-family: inherit;
  letter-spacing: -0.015em;
  text-align: left;
  cursor: pointer;
  transition: background var(--gos-duration-fast, 180ms) ease,
              color var(--gos-duration-fast, 180ms) ease,
              transform var(--gos-duration-fast, 180ms) var(--gos-ease-spring, cubic-bezier(0.22, 1, 0.36, 1));
}

.gos-nav-rail-flyout__item:hover {
  background: var(--gos-hover-fill);
  color: var(--gos-text-primary);
  transform: translateX(2px);
}

.gos-nav-rail-flyout__item.is-active {
  background: color-mix(in srgb, var(--gos-accent) 12%, transparent);
  color: var(--gos-accent);
  font-weight: 600;
}

.gos-nav-rail-flyout__item.is-active:hover {
  background: color-mix(in srgb, var(--gos-accent) 16%, transparent);
  color: var(--gos-accent);
}

.gos-nav-rail-flyout__item-icon-wrap {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.625rem;
  height: 1.625rem;
  border-radius: 7px;
  flex-shrink: 0;
  background: color-mix(in srgb, var(--gos-text-primary) 5%, transparent);
  color: inherit;
  transition: background var(--gos-duration-fast, 180ms) ease;
}

.gos-nav-rail-flyout__item:hover .gos-nav-rail-flyout__item-icon-wrap {
  background: color-mix(in srgb, var(--gos-text-primary) 8%, transparent);
}

.gos-nav-rail-flyout__item.is-active .gos-nav-rail-flyout__item-icon-wrap {
  background: color-mix(in srgb, var(--gos-accent) 16%, transparent);
  color: var(--gos-accent);
}

.gos-nav-rail-flyout__item-icon {
  flex-shrink: 0;
}

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

.gos-nav-rail-flyout__item-check {
  flex-shrink: 0;
  color: var(--gos-accent);
  opacity: 0;
  transform: scale(0.8);
  transition: opacity var(--gos-duration-fast, 180ms) ease,
              transform var(--gos-duration-fast, 180ms) var(--gos-ease-spring, cubic-bezier(0.22, 1, 0.36, 1));
}

.gos-nav-rail-flyout__item.is-active .gos-nav-rail-flyout__item-check {
  opacity: 1;
  transform: scale(1);
}

@media (prefers-reduced-motion: reduce) {
  .gos-nav-group__items,
  .gos-nav-group__chevron,
  .gos-nav .nav-item.gos-nav-item,
  .gos-nav-group,
  .gos-nav-settings {
    transition: none;
  }

  .gos-nav .nav-item.gos-nav-item.is-hiding,
  .gos-nav-group.is-hiding,
  .gos-nav-settings.is-hiding {
    transition: none;
  }
}

/* --- Pinned, locked, pin control --- */
.gos-nav-pinned,
.gos-nav-recents {
  flex-shrink: 0;
  border: 0;
  margin: 0;
  padding: 0;
  background: transparent;
  box-shadow: none;
}

.gos-nav-section .gos-nav-group__header {
  min-height: 2.125rem;
  padding: 0.4375rem 0.5rem;
}

.gos-nav-section .gos-nav-group__label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: -0.01em;
  text-transform: none;
  color: var(--gos-text-secondary);
}

.gos-nav .nav-item.gos-nav-item {
  position: relative;
}

.gos-nav-pin-btn {
  position: absolute;
  right: 0.375rem;
  top: 50%;
  transform: translateY(-50%);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.375rem;
  height: 1.375rem;
  padding: 0;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--gos-text-soft);
  opacity: 0;
  cursor: pointer;
  transition: opacity var(--gos-duration-fast, 180ms) ease, background var(--gos-duration-fast, 180ms) ease, color var(--gos-duration-fast, 180ms) ease;
}

.gos-nav .nav-item.gos-nav-item:hover .gos-nav-pin-btn,
.gos-nav .nav-item.gos-nav-item:focus-within .gos-nav-pin-btn {
  opacity: 1;
}

.gos-nav-pin-btn:hover {
  background: var(--gos-hover-fill);
  color: var(--gos-text-primary);
}

.gos-nav-item--locked {
  opacity: 0.72;
  cursor: not-allowed;
}

.gos-nav-item--locked .gos-nav-item__icon {
  opacity: 0.65;
}

.gos-nav-item__lock {
  flex-shrink: 0;
  margin-left: auto;
  color: var(--gos-text-soft);
}

.gos-nav-rail-flyout__item--locked {
  opacity: 0.72;
  cursor: not-allowed;
}

.gos-nav-rail-flyout__lock {
  margin-left: auto;
  color: var(--gos-text-soft);
}

.gos-sidebar--rail .gos-nav-group.is-rail-open .gos-nav-group__header {
  color: var(--gos-accent);
}

.gos-nav-pinned__empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.375rem;
  margin: 0.125rem 0.25rem 0.375rem;
  padding: 0.875rem 0.75rem;
  border: 1px dashed color-mix(in srgb, var(--gos-border) 90%, transparent);
  border-radius: 10px;
  font-size: 11px;
  line-height: 1.45;
  color: var(--gos-text-soft);
  text-align: center;
  background: color-mix(in srgb, var(--gos-surface-muted) 40%, transparent);
}

.gos-nav-pinned__empty-icon {
  color: var(--gos-text-soft);
  opacity: 0.7;
}

.gos-nav-pinned__empty-text {
  max-width: 14rem;
}

/* Mobile drawer stagger reveal */
.gos-nav.gos-nav--mounted .gos-nav-jump-wrap,
.gos-nav.gos-nav--mounted .gos-nav-pinned,
.gos-nav.gos-nav--mounted .gos-nav-recents,
.gos-nav.gos-nav--mounted .gos-nav-home,
.gos-nav.gos-nav--mounted .gos-nav-group,
.gos-nav.gos-nav--mounted .gos-nav-settings {
  opacity: 0;
  transform: translateY(4px);
}

.gos-nav.gos-nav--revealed .gos-nav-zone,
.gos-nav.gos-nav--revealed .gos-nav-jump-wrap,
.gos-nav.gos-nav--revealed .gos-nav-pinned,
.gos-nav.gos-nav--revealed .gos-nav-recents,
.gos-nav.gos-nav--revealed .gos-nav-home,
.gos-nav.gos-nav--revealed .gos-nav-group,
.gos-nav.gos-nav--revealed .gos-nav-settings {
  opacity: 1;
  transform: none;
  transition: opacity var(--gos-duration-fast, 180ms) var(--gos-ease-out, ease),
              transform var(--gos-duration-fast, 180ms) var(--gos-ease-out, ease);
}

#mobile-sidebar.gos-sidebar--open .gos-nav--revealed .gos-nav-jump-wrap { transition-delay: 0.02s; }
#mobile-sidebar.gos-sidebar--open .gos-nav--revealed .gos-nav-pinned { transition-delay: 0.04s; }
#mobile-sidebar.gos-sidebar--open .gos-nav--revealed .gos-nav-recents { transition-delay: 0.06s; }
#mobile-sidebar.gos-sidebar--open .gos-nav--revealed .gos-nav-home { transition-delay: 0.08s; }
#mobile-sidebar.gos-sidebar--open .gos-nav--revealed .gos-nav-group:nth-child(6) { transition-delay: 0.1s; }
#mobile-sidebar.gos-sidebar--open .gos-nav--revealed .gos-nav-group:nth-child(7) { transition-delay: 0.12s; }
#mobile-sidebar.gos-sidebar--open .gos-nav--revealed .gos-nav-group:nth-child(8) { transition-delay: 0.14s; }
#mobile-sidebar.gos-sidebar--open .gos-nav--revealed .gos-nav-settings { transition-delay: 0.16s; }

#mobile-menu-overlay.gos-mobile-overlay--visible {
  opacity: 1;
}

#mobile-menu-overlay {
  opacity: 0;
  transition: opacity var(--gos-duration-fast, 180ms) ease;
}

.gos-nav-rail-flyout {
  transition: opacity var(--gos-duration-fast, 180ms) var(--gos-ease-spring, cubic-bezier(0.22, 1, 0.36, 1)),
              transform var(--gos-duration-fast, 180ms) var(--gos-ease-spring, cubic-bezier(0.22, 1, 0.36, 1));
}

@media (prefers-reduced-motion: reduce) {
  .gos-sidebar--rail .gos-nav-jump,
  .gos-sidebar--rail .gos-nav-home .gos-nav-item,
  .gos-sidebar--rail .gos-nav-group__header,
  .gos-sidebar--rail .gos-nav .nav-item.gos-nav-item,
  .gos-sidebar--rail .gos-ws-btn,
  .gos-sidebar--rail .gos-sidebar-collapse-btn,
  .gos-nav-rail-flyout__item {
    transition: none;
    transform: none !important;
  }
}

@media (prefers-reduced-motion: reduce) {
  .gos-nav.gos-nav--mounted .gos-nav-zone,
  .gos-nav.gos-nav--mounted .gos-nav-jump-wrap,
  .gos-nav.gos-nav--mounted .gos-nav-pinned,
  .gos-nav.gos-nav--mounted .gos-nav-recents,
  .gos-nav.gos-nav--mounted .gos-nav-home,
  .gos-nav.gos-nav--mounted .gos-nav-group,
  .gos-nav.gos-nav--mounted .gos-nav-settings,
  #mobile-sidebar.gos-sidebar {
    opacity: 1;
    transform: none;
    transition: none;
    animation: none;
  }
}

@media (min-width: 1024px) {
  .gos-sidebar--rail .gos-nav-pinned__empty,
  .gos-sidebar--rail .gos-nav-pin-btn,
  .gos-sidebar--rail .gos-nav-item__lock {
    display: none;
  }
}