/* 10 named sidebar patterns */

/* ========== 1. App Shell Nav ========== */
.sidebar-app-shell {
  display: grid;
  grid-template-columns: var(--rail-w) minmax(0, 1fr);
  min-height: 22rem;
  background: var(--surface-raised);
}

.sidebar-app-shell__nav {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1rem 0.85rem;
  border-right: 1px solid var(--border);
  background: #f7f9fb;
}

.sidebar-app-shell__brand {
  margin: 0 0.4rem 0.75rem;
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--accent-deep);
}

.sidebar-app-shell__nav a {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.55rem 0.65rem;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--ink-muted);
}

.sidebar-app-shell__nav a:hover {
  background: #fff;
  color: var(--ink);
}

.sidebar-app-shell__nav a[aria-current="page"] {
  background: var(--accent-soft);
  color: var(--accent-deep);
}

.sidebar-app-shell__main {
  min-width: 0;
}

@media (max-width: 40rem) {
  .sidebar-app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar-app-shell__nav {
    border-right: 0;
    border-bottom: 1px solid var(--border);
    flex-direction: column;
  }

  .sidebar-app-shell__brand {
    width: 100%;
    margin-bottom: 0.25rem;
  }
}

/* ========== 2. App Nested ========== */
.sidebar-app-nested {
  display: grid;
  grid-template-columns: var(--rail-w) minmax(0, 1fr);
  min-height: 22rem;
  background: var(--surface-raised);
}

.sidebar-app-nested__nav {
  padding: 1rem 0.75rem;
  border-right: 1px solid var(--border);
  background: var(--sidebar-dark);
  color: #fff;
}

.sidebar-app-nested__brand {
  margin: 0 0.5rem 1rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.sidebar-app-nested details {
  margin-bottom: 0.25rem;
}

.sidebar-app-nested summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.55rem 0.65rem;
  border-radius: 8px;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--sidebar-dark-muted);
  cursor: pointer;
}

.sidebar-app-nested summary::-webkit-details-marker {
  display: none;
}

.sidebar-app-nested summary::after {
  content: "▾";
  font-size: 0.7rem;
  opacity: 0.7;
}

.sidebar-app-nested details[open] summary {
  color: #fff;
  background: rgb(255 255 255 / 0.06);
}

.sidebar-app-nested summary:hover {
  color: #fff;
  background: rgb(255 255 255 / 0.06);
}

.sidebar-app-nested__links {
  margin: 0.15rem 0 0.35rem;
  padding: 0 0 0 0.35rem;
  list-style: none;
  display: grid;
  gap: 0.1rem;
}

.sidebar-app-nested__links a {
  display: block;
  padding: 0.45rem 0.65rem;
  border-radius: 8px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--sidebar-dark-muted);
}

.sidebar-app-nested__links a:hover,
.sidebar-app-nested__links a[aria-current="page"] {
  color: #fff;
  background: rgb(255 255 255 / 0.08);
}

.sidebar-app-nested__links a[aria-current="page"] {
  box-shadow: inset 2px 0 0 var(--accent);
}

@media (max-width: 40rem) {
  .sidebar-app-nested {
    grid-template-columns: 1fr;
  }

  .sidebar-app-nested__nav {
    border-right: 0;
  }
}

/* ========== 3. App User ========== */
.sidebar-app-user {
  display: grid;
  grid-template-columns: var(--rail-w) minmax(0, 1fr);
  min-height: 22rem;
  background: var(--surface-raised);
}

.sidebar-app-user__nav {
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border);
  background: #fff;
}

.sidebar-app-user__top {
  padding: 1rem 0.85rem 0.65rem;
}

.sidebar-app-user__brand {
  display: block;
  margin-bottom: 0.75rem;
  font-weight: 800;
  color: var(--accent-deep);
}

.sidebar-app-user__search {
  width: 100%;
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  background: #f7f9fb;
  font-size: 0.8125rem;
}

.sidebar-app-user__links {
  display: grid;
  gap: 0.15rem;
  padding: 0.35rem 0.85rem;
  margin: 0;
  list-style: none;
  flex: 1;
}

.sidebar-app-user__links a {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.55rem 0.65rem;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--ink-muted);
}

.sidebar-app-user__links a[aria-current="page"],
.sidebar-app-user__links a:hover {
  background: var(--accent-soft);
  color: var(--accent-deep);
}

.sidebar-app-user__footer {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.85rem;
  border-top: 1px solid var(--border);
  background: #f7f9fb;
}

.sidebar-app-user__avatar {
  width: 2rem;
  height: 2rem;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 0.75rem;
  font-weight: 800;
  flex-shrink: 0;
}

.sidebar-app-user__meta {
  min-width: 0;
}

.sidebar-app-user__meta strong {
  display: block;
  font-size: 0.8125rem;
  font-weight: 700;
}

.sidebar-app-user__meta span {
  display: block;
  font-size: 0.7rem;
  color: var(--ink-faint);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

@media (max-width: 40rem) {
  .sidebar-app-user {
    grid-template-columns: 1fr;
  }

  .sidebar-app-user__nav {
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }
}

/* ========== 4. Filter Overlay ========== */
.sidebar-filter-overlay {
  position: relative;
  min-height: 22rem;
  background: var(--surface-raised);
}

.sidebar-filter-overlay__bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.65rem;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border);
}

.sidebar-filter-overlay__bar h3 {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 800;
}

.sidebar-filter-overlay__body {
  padding: 1.15rem 1.25rem;
  color: var(--ink-muted);
  font-size: 0.875rem;
}

.sidebar-filter-overlay__scrim {
  position: absolute;
  inset: 0;
  background: rgb(26 35 50 / 0.35);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--motion);
  z-index: 2;
}

.sidebar-filter-overlay__drawer {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(18rem, 88%);
  padding: 1rem;
  background: #fff;
  border-left: 1px solid var(--border);
  box-shadow: -12px 0 32px rgb(26 35 50 / 0.12);
  transform: translateX(105%);
  transition: transform var(--motion);
  z-index: 3;
  overflow: auto;
}

.sidebar-filter-overlay.is-open .sidebar-filter-overlay__scrim {
  opacity: 1;
  pointer-events: auto;
}

.sidebar-filter-overlay.is-open .sidebar-filter-overlay__drawer {
  transform: translateX(0);
}

.sidebar-filter-overlay__drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.sidebar-filter-overlay__drawer-head h3 {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 800;
}

.sidebar-filter-overlay__group {
  margin-bottom: 1rem;
}

.sidebar-filter-overlay__group h4 {
  margin: 0 0 0.45rem;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.sidebar-filter-overlay__options {
  display: grid;
  gap: 0.35rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.875rem;
  color: var(--ink-muted);
}

.sidebar-filter-overlay__options label {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.sidebar-filter-overlay__options input {
  accent-color: var(--accent);
}

.sidebar-filter-overlay__actions {
  display: flex;
  gap: 0.45rem;
  margin-top: 1rem;
}

/* ========== 5. Filter Push ========== */
.sidebar-filter-push {
  display: grid;
  grid-template-columns: 0 minmax(0, 1fr);
  min-height: 22rem;
  background: var(--surface-raised);
  transition: grid-template-columns var(--motion);
}

.sidebar-filter-push.is-open {
  grid-template-columns: minmax(13rem, 16rem) minmax(0, 1fr);
}

.sidebar-filter-push__rail {
  overflow: hidden;
  border-right: 1px solid var(--border);
  background: #f7f9fb;
}

.sidebar-filter-push__rail-inner {
  width: 16rem;
  padding: 1rem 0.9rem;
}

.sidebar-filter-push__rail-inner h3 {
  margin: 0 0 0.85rem;
  font-size: 0.9rem;
  font-weight: 800;
}

.sidebar-filter-push__main {
  min-width: 0;
}

.sidebar-filter-push__toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.65rem;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border);
}

.sidebar-filter-push__toolbar h3 {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 800;
}

@media (max-width: 40rem) {
  .sidebar-filter-push,
  .sidebar-filter-push.is-open {
    grid-template-columns: 1fr;
  }

  .sidebar-filter-push__rail {
    border-right: 0;
    border-bottom: 1px solid var(--border);
    max-height: 0;
    transition: max-height var(--motion);
  }

  .sidebar-filter-push.is-open .sidebar-filter-push__rail {
    max-height: 20rem;
  }

  .sidebar-filter-push__rail-inner {
    width: auto;
  }
}

/* ========== 6. Settings Rail ========== */
.sidebar-settings-rail {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(14rem, 17rem);
  min-height: 22rem;
  background: var(--surface-raised);
}

.sidebar-settings-rail__main {
  border-right: 1px solid var(--border);
  min-width: 0;
}

.sidebar-settings-rail__rail {
  padding: 1.1rem 1rem;
  background: #f7f9fb;
  overflow: auto;
}

.sidebar-settings-rail__rail h3 {
  margin: 0 0 0.85rem;
  font-size: 0.95rem;
  font-weight: 800;
}

.sidebar-settings-rail__field {
  display: grid;
  gap: 0.3rem;
  margin-bottom: 0.85rem;
}

.sidebar-settings-rail__field label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--ink);
}

.sidebar-settings-rail__field input,
.sidebar-settings-rail__field select {
  width: 100%;
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  background: #fff;
  font-size: 0.8125rem;
}

.sidebar-settings-rail__check {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 0.85rem;
  font-size: 0.8125rem;
  color: var(--ink-muted);
}

.sidebar-settings-rail__check input {
  accent-color: var(--accent);
}

@media (max-width: 48rem) {
  .sidebar-settings-rail {
    grid-template-columns: 1fr;
  }

  .sidebar-settings-rail__main {
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }
}

/* ========== 7. Settings Nav ========== */
.sidebar-settings-nav {
  display: grid;
  grid-template-columns: minmax(11rem, 13rem) minmax(0, 1fr);
  min-height: 22rem;
  background: var(--surface-raised);
}

.sidebar-settings-nav__rail {
  padding: 1rem 0.75rem;
  border-right: 1px solid var(--border);
  background: #fff;
}

.sidebar-settings-nav__rail h3 {
  margin: 0 0.5rem 0.75rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.sidebar-settings-nav__links {
  display: grid;
  gap: 0.15rem;
}

.sidebar-settings-nav__rail a {
  display: block;
  padding: 0.55rem 0.65rem;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--ink-muted);
}

.sidebar-settings-nav__rail a:hover {
  background: #f7f9fb;
  color: var(--ink);
}

.sidebar-settings-nav__rail a[aria-current="page"] {
  background: var(--accent-soft);
  color: var(--accent-deep);
}

.sidebar-settings-nav__panel {
  padding: 1.15rem 1.25rem;
  min-width: 0;
}

.sidebar-settings-nav__panel h3 {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
  font-weight: 800;
}

.sidebar-settings-nav__panel > p {
  margin: 0 0 1rem;
  font-size: 0.875rem;
  color: var(--ink-muted);
  overflow-wrap: break-word;
}

.sidebar-settings-nav__stack {
  display: grid;
  gap: 0.75rem;
  max-width: 24rem;
}

.sidebar-settings-nav__stack label {
  display: grid;
  gap: 0.3rem;
  font-size: 0.75rem;
  font-weight: 700;
}

.sidebar-settings-nav__stack input {
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 400;
}

@media (max-width: 40rem) {
  .sidebar-settings-nav {
    grid-template-columns: 1fr;
  }

  .sidebar-settings-nav__rail {
    border-right: 0;
    border-bottom: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
  }

  .sidebar-settings-nav__rail h3 {
    width: 100%;
    margin: 0;
  }

  .sidebar-settings-nav__links {
    display: flex;
    flex-wrap: nowrap;
    gap: 0.35rem;
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    padding-bottom: 0.15rem;
  }

  .sidebar-settings-nav__rail a {
    flex: 0 0 auto;
    white-space: nowrap;
  }
}

/* ========== 8. Icon Collapse ========== */
.sidebar-icon-collapse {
  display: grid;
  grid-template-columns: var(--rail-w) minmax(0, 1fr);
  min-height: 22rem;
  background: var(--surface-raised);
  transition: grid-template-columns var(--motion);
}

.sidebar-icon-collapse.is-collapsed {
  grid-template-columns: var(--rail-mini) minmax(0, 1fr);
}

.sidebar-icon-collapse.is-collapsed .sidebar-icon-collapse__rail {
  width: var(--rail-mini);
  max-width: var(--rail-mini);
}

.sidebar-icon-collapse__rail {
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border);
  background: var(--sidebar-dark);
  color: #fff;
  overflow: hidden;
  min-width: 0;
}

.sidebar-icon-collapse__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.35rem;
  padding: 0.85rem 0.7rem;
}

.sidebar-icon-collapse__brand {
  font-weight: 800;
  white-space: nowrap;
  overflow: hidden;
}

.sidebar-icon-collapse.is-collapsed .sidebar-icon-collapse__brand {
  display: none;
}

.sidebar-icon-collapse.is-collapsed .sidebar-icon-collapse__label {
  display: none;
}

.sidebar-icon-collapse__toggle {
  flex-shrink: 0;
  width: 2rem;
  height: 2rem;
  border: 1px solid rgb(255 255 255 / 0.2);
  border-radius: 8px;
  background: rgb(255 255 255 / 0.06);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
}

.sidebar-icon-collapse__links {
  display: grid;
  gap: 0.2rem;
  padding: 0.35rem 0.55rem 1rem;
  margin: 0;
  list-style: none;
}

.sidebar-icon-collapse__links a {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.55rem 0.55rem;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--sidebar-dark-muted);
  white-space: nowrap;
}

.sidebar-icon-collapse__links a:hover,
.sidebar-icon-collapse__links a[aria-current="page"] {
  background: rgb(255 255 255 / 0.08);
  color: #fff;
}

.sidebar-icon-collapse.is-collapsed .sidebar-icon-collapse__links a {
  justify-content: center;
  padding-inline: 0.45rem;
}

@media (max-width: 40rem) {
  .sidebar-icon-collapse,
  .sidebar-icon-collapse.is-collapsed {
    grid-template-columns: 1fr;
  }

  .sidebar-icon-collapse__rail {
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .sidebar-icon-collapse.is-collapsed .sidebar-icon-collapse__brand,
  .sidebar-icon-collapse.is-collapsed .sidebar-icon-collapse__label {
    display: initial;
  }

  .sidebar-icon-collapse.is-collapsed .sidebar-icon-collapse__brand {
    display: block;
  }

  .sidebar-icon-collapse.is-collapsed .sidebar-icon-collapse__label {
    display: inline;
  }

  .sidebar-icon-collapse.is-collapsed .sidebar-icon-collapse__rail {
    width: auto;
    max-width: none;
  }

  .sidebar-icon-collapse.is-collapsed .sidebar-icon-collapse__links a {
    justify-content: flex-start;
  }
}

/* ========== 9. Icon Mini ========== */
.sidebar-icon-mini {
  display: grid;
  grid-template-columns: var(--rail-mini) minmax(0, 1fr);
  min-height: 22rem;
  background: var(--surface-raised);
}

.sidebar-icon-mini__rail {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  padding: 0.75rem 0.45rem;
  border-right: 1px solid var(--border);
  background: #fff;
}

.sidebar-icon-mini__brand {
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  margin-bottom: 0.35rem;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 800;
}

.sidebar-icon-mini__rail a {
  display: grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 10px;
  color: var(--ink-muted);
}

.sidebar-icon-mini__rail a:hover,
.sidebar-icon-mini__rail a[aria-current="page"] {
  background: var(--accent-soft);
  color: var(--accent-deep);
}

.sidebar-icon-mini__rail a span {
  font-size: 0.7rem;
  font-weight: 800;
}

@media (max-width: 30rem) {
  .sidebar-icon-mini {
    grid-template-columns: 1fr;
  }

  .sidebar-icon-mini__rail {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }
}

/* ========== 10. Icon Flyout ========== */
.sidebar-icon-flyout {
  display: grid;
  grid-template-columns: var(--rail-mini) minmax(0, 1fr);
  min-height: 22rem;
  background: var(--surface-raised);
}

.sidebar-icon-flyout__rail {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  padding: 0.75rem 0.45rem;
  border-right: 1px solid var(--border);
  background: var(--sidebar-dark);
}

.sidebar-icon-flyout__brand {
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  margin-bottom: 0.35rem;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 800;
}

.sidebar-icon-flyout__item {
  position: relative;
}

.sidebar-icon-flyout__hit {
  display: grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--sidebar-dark-muted);
  font-size: 0.7rem;
  font-weight: 800;
}

.sidebar-icon-flyout__hit:hover,
.sidebar-icon-flyout__item.is-open .sidebar-icon-flyout__hit,
.sidebar-icon-flyout__hit[aria-current="page"] {
  background: rgb(255 255 255 / 0.1);
  color: #fff;
}

.sidebar-icon-flyout__menu {
  position: absolute;
  top: 0;
  left: calc(100% + 0.45rem);
  min-width: 10.5rem;
  padding: 0.45rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
  box-shadow: var(--sidebar-shadow);
  display: none;
}

.sidebar-icon-flyout__item.is-open .sidebar-icon-flyout__menu {
  display: grid;
  gap: 0.15rem;
}

.sidebar-icon-flyout__menu a {
  display: block;
  padding: 0.45rem 0.6rem;
  border-radius: 6px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--ink-muted);
  white-space: nowrap;
}

.sidebar-icon-flyout__menu a:hover,
.sidebar-icon-flyout__menu a[aria-current="page"] {
  background: var(--accent-soft);
  color: var(--accent-deep);
}

.sidebar-icon-flyout__menu-label {
  padding: 0.25rem 0.6rem 0.35rem;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

@media (max-width: 40rem) {
  .sidebar-icon-flyout {
    grid-template-columns: 1fr;
  }

  .sidebar-icon-flyout__rail {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .sidebar-icon-flyout__menu {
    left: 50%;
    top: calc(100% + 0.35rem);
    transform: translateX(-50%);
  }
}

/* ========== 11. Dual Rail ========== */
.sidebar-dual {
  display: grid;
  grid-template-columns: var(--rail-mini) minmax(12rem, 15rem) minmax(0, 1fr);
  min-height: 22rem;
  background: var(--surface-raised);
}

.sidebar-dual__icons {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  padding: 0.75rem 0.45rem;
  background: var(--sidebar-dark);
  border-right: 1px solid rgb(255 255 255 / 0.06);
}

.sidebar-dual__icons a,
.sidebar-dual__brand {
  display: grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 10px;
  color: var(--sidebar-dark-muted);
  font-size: 0.7rem;
  font-weight: 800;
}

.sidebar-dual__brand {
  margin-bottom: 0.35rem;
  background: var(--accent);
  color: #fff;
}

.sidebar-dual__icons a:hover,
.sidebar-dual__icons a[aria-current="page"] {
  background: rgb(255 255 255 / 0.1);
  color: #fff;
}

.sidebar-dual__channels {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 0.85rem 0.75rem;
  border-right: 1px solid var(--border);
  background: #f7f9fb;
  overflow: auto;
}

.sidebar-dual__channels h3 {
  margin: 0 0.35rem 0.65rem;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.sidebar-dual__channels ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.15rem;
}

.sidebar-dual__channels a {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.55rem;
  border-radius: 8px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--ink-muted);
}

.sidebar-dual__channels a:hover,
.sidebar-dual__channels a[aria-current="page"] {
  background: #fff;
  color: var(--accent-deep);
}

.sidebar-dual__hash {
  color: var(--ink-faint);
  font-weight: 700;
}

@media (max-width: 48rem) {
  .sidebar-dual {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto minmax(0, 1fr);
  }

  .sidebar-dual__icons {
    flex-direction: row;
    justify-content: flex-start;
    flex-wrap: wrap;
    border-right: 0;
    border-bottom: 1px solid rgb(255 255 255 / 0.08);
    padding: 0.65rem 0.75rem;
  }

  .sidebar-dual__brand {
    margin-bottom: 0;
    margin-right: 0.25rem;
  }

  .sidebar-dual__channels {
    border-right: 0;
    border-bottom: 1px solid var(--border);
    max-height: 12rem;
  }
}

@media (max-width: 30rem) {
  .sidebar-dual__channels {
    max-height: none;
  }
}

/* ========== 12. Off-canvas ========== */
.sidebar-offcanvas {
  position: relative;
  min-height: 22rem;
  background: var(--surface-raised);
}

.sidebar-offcanvas__bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border);
}

.sidebar-offcanvas__bar h3 {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 800;
}

.sidebar-offcanvas__body {
  padding: 1.15rem 1.25rem;
  color: var(--ink-muted);
  font-size: 0.875rem;
}

.sidebar-offcanvas__scrim {
  position: absolute;
  inset: 0;
  background: rgb(26 35 50 / 0.35);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--motion);
  z-index: 2;
}

.sidebar-offcanvas__drawer {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: min(16.5rem, 88%);
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 1rem 0.85rem;
  background: var(--sidebar-dark);
  color: #fff;
  box-shadow: 12px 0 32px rgb(26 35 50 / 0.18);
  transform: translateX(-105%);
  transition: transform var(--motion);
  z-index: 3;
  overflow: auto;
}

.sidebar-offcanvas.is-open .sidebar-offcanvas__scrim {
  opacity: 1;
  pointer-events: auto;
}

.sidebar-offcanvas.is-open .sidebar-offcanvas__drawer {
  transform: translateX(0);
}

.sidebar-offcanvas__drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.sidebar-offcanvas__drawer-head strong {
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.sidebar-offcanvas__drawer a {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.55rem 0.65rem;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--sidebar-dark-muted);
}

.sidebar-offcanvas__drawer a:hover,
.sidebar-offcanvas__drawer a[aria-current="page"] {
  background: rgb(255 255 255 / 0.08);
  color: #fff;
}

.sidebar-offcanvas__close {
  width: 2rem;
  height: 2rem;
  border: 1px solid rgb(255 255 255 / 0.2);
  border-radius: 8px;
  background: rgb(255 255 255 / 0.06);
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1;
}

/* ========== 13. Tree Browser ========== */
.sidebar-tree {
  display: grid;
  grid-template-columns: minmax(14rem, 17rem) minmax(0, 1fr);
  min-height: 22rem;
  background: var(--surface-raised);
}

.sidebar-tree__rail {
  padding: 0.85rem 0.65rem;
  border-right: 1px solid var(--border);
  background: #f7f9fb;
  overflow: auto;
}

.sidebar-tree__rail > h3 {
  margin: 0 0.45rem 0.65rem;
  font-size: 0.8rem;
  font-weight: 800;
}

.sidebar-tree__list,
.sidebar-tree__list ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.sidebar-tree__list ul {
  margin-left: 0.85rem;
  padding-left: 0.55rem;
  border-left: 1px solid var(--border);
}

.sidebar-tree details {
  margin: 0.1rem 0;
}

.sidebar-tree summary {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0.45rem;
  border-radius: 6px;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--ink);
  cursor: pointer;
}

.sidebar-tree summary::-webkit-details-marker {
  display: none;
}

.sidebar-tree summary::before {
  content: "▸";
  width: 0.75rem;
  color: var(--ink-faint);
  font-size: 0.7rem;
}

.sidebar-tree details[open] > summary::before {
  content: "▾";
}

.sidebar-tree summary:hover {
  background: #fff;
}

.sidebar-tree__file {
  display: block;
  padding: 0.35rem 0.45rem 0.35rem 1.2rem;
  border-radius: 6px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--ink-muted);
}

.sidebar-tree__file:hover,
.sidebar-tree__file[aria-current="page"] {
  background: var(--accent-soft);
  color: var(--accent-deep);
}

@media (max-width: 40rem) {
  .sidebar-tree {
    grid-template-columns: 1fr;
  }

  .sidebar-tree__rail {
    border-right: 0;
    border-bottom: 1px solid var(--border);
    max-height: 12rem;
  }
}

/* ========== 14. Inbox List ========== */
.sidebar-inbox {
  display: grid;
  grid-template-columns: minmax(14rem, 18rem) minmax(0, 1fr);
  min-height: 22rem;
  background: var(--surface-raised);
}

.sidebar-inbox__rail {
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border);
  background: #fff;
  min-width: 0;
}

.sidebar-inbox__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.85rem 0.9rem;
  border-bottom: 1px solid var(--border);
}

.sidebar-inbox__head h3 {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 800;
}

.sidebar-inbox__list {
  margin: 0;
  padding: 0.35rem;
  list-style: none;
  overflow: auto;
  flex: 1;
}

.sidebar-inbox__item {
  display: grid;
  gap: 0.15rem;
  width: 100%;
  padding: 0.7rem 0.75rem;
  border: 0;
  border-radius: 8px;
  background: transparent;
  text-align: left;
  color: inherit;
  cursor: pointer;
}

.sidebar-inbox__item:hover {
  background: #f7f9fb;
}

.sidebar-inbox__item[aria-current="true"] {
  background: var(--accent-soft);
}

.sidebar-inbox__item strong {
  display: block;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--ink);
}

.sidebar-inbox__item span {
  display: block;
  font-size: 0.75rem;
  color: var(--ink-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-inbox__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--ink-faint);
}

.sidebar-inbox__unread {
  display: inline-grid;
  place-items: center;
  min-width: 1.15rem;
  height: 1.15rem;
  padding: 0 0.3rem;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-size: 0.65rem;
}

@media (max-width: 40rem) {
  .sidebar-inbox {
    grid-template-columns: 1fr;
  }

  .sidebar-inbox__rail {
    border-right: 0;
    border-bottom: 1px solid var(--border);
    max-height: 14rem;
  }
}

/* ========== 15. Docs TOC ========== */
.sidebar-docs-toc {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(11rem, 14rem);
  min-height: 22rem;
  background: var(--surface-raised);
}

.sidebar-docs-toc__article {
  padding: 1.15rem 1.25rem;
  border-right: 1px solid var(--border);
  min-width: 0;
}

.sidebar-docs-toc__article h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  font-weight: 800;
}

.sidebar-docs-toc__article p {
  margin: 0 0 0.85rem;
  font-size: 0.875rem;
  color: var(--ink-muted);
}

.sidebar-docs-toc__article h4 {
  margin: 1rem 0 0.35rem;
  font-size: 0.9rem;
  font-weight: 700;
}

.sidebar-docs-toc__rail {
  padding: 1.1rem 0.9rem;
  background: #f7f9fb;
  overflow: auto;
}

.sidebar-docs-toc__rail h3 {
  margin: 0 0 0.65rem;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.sidebar-docs-toc__rail ol {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.15rem;
}

.sidebar-docs-toc__rail a {
  display: block;
  padding: 0.4rem 0.55rem;
  border-radius: 6px;
  border-left: 2px solid transparent;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--ink-muted);
}

.sidebar-docs-toc__rail a:hover {
  background: #fff;
  color: var(--ink);
}

.sidebar-docs-toc__rail a[aria-current="location"] {
  border-left-color: var(--accent);
  background: #fff;
  color: var(--accent-deep);
}

.sidebar-docs-toc__rail .is-nested {
  padding-left: 1.1rem;
  font-weight: 500;
  font-size: 0.75rem;
}

@media (max-width: 40rem) {
  .sidebar-docs-toc {
    grid-template-columns: 1fr;
  }

  .sidebar-docs-toc__article {
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .sidebar-docs-toc__rail {
    order: -1;
  }
}