@layer components {
  /* App shell: fixed-width sidebar + fluid content, full viewport height. */
  .rs-app {
    display: grid;
    grid-template-columns: auto 1fr;
    block-size: 100dvh;
    overflow: hidden;
    background: var(--rs-color-background-page);
    color: var(--rs-color-foreground-neutral);
  }

  /* ---- Sidebar rail ---- */
  .rs-sidebar {
    --rs-sidebar-width: 256px;
    display: flex;
    flex-direction: column;
    inline-size: var(--rs-sidebar-width);
    min-block-size: 0;
    border-inline-end: 1px solid var(--rs-color-border-neutral-faded);
    background: var(--rs-color-background-page-faded);
  }

  .rs-sidebar__header {
    flex: none;
    display: flex;
    flex-direction: column;
    gap: var(--rs-unit-x2);
    padding: var(--rs-unit-x3);
  }

  .rs-sidebar__body {
    flex: 1;
    min-block-size: 0;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: var(--rs-unit-x5);
    padding: var(--rs-unit-x2) var(--rs-unit-x3);
    scrollbar-width: thin;
  }

  .rs-sidebar__footer {
    flex: none;
    padding: var(--rs-unit-x2) var(--rs-unit-x3);
    border-block-start: 1px solid var(--rs-color-border-neutral-faded);
  }

  .rs-sidebar__group {
    display: flex;
    flex-direction: column;
    gap: 2px;
  }

  .rs-sidebar__group-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--rs-unit-x2);
    padding: var(--rs-unit-x1) var(--rs-unit-x2);
    color: var(--rs-color-foreground-neutral-faded);
    font-size: var(--rs-font-size-caption-1);
    line-height: var(--rs-line-height-caption-1);
    font-weight: var(--rs-font-weight-semibold);
  }

  /* A clickable header/footer row that opens a dropdown menu. */
  .rs-sidebar__trigger {
    display: flex;
    align-items: center;
    gap: var(--rs-unit-x2);
    inline-size: 100%;
    padding: var(--rs-unit-x2);
    border: 0;
    border-radius: var(--rs-radius-small);
    background: transparent;
    color: inherit;
    cursor: pointer;
    font: inherit;
    text-align: start;
    transition: background-color var(--rs-duration-fast) var(--rs-easing-standard);
  }

  .rs-sidebar__trigger:hover {
    background: var(--rs-color-background-neutral-faded);
  }

  .rs-sidebar__trigger-name {
    flex: 1;
    min-inline-size: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: var(--rs-font-size-body-3);
    line-height: var(--rs-line-height-body-3);
    font-weight: var(--rs-font-weight-semibold);
  }

  .rs-sidebar__trigger > .rs-icon:last-child {
    flex: none;
    inline-size: var(--rs-unit-x4);
    block-size: var(--rs-unit-x4);
    color: var(--rs-color-foreground-neutral-faded);
  }

  /* ---- Search box (faded field with leading icon + trailing hotkey) ---- */
  .rs-search {
    display: flex;
    align-items: center;
    gap: var(--rs-unit-x2);
    padding: var(--rs-unit-x2);
    border-radius: var(--rs-radius-small);
    background: var(--rs-color-background-neutral-faded);
    color: var(--rs-color-foreground-neutral-faded);
  }

  .rs-search > .rs-icon {
    flex: none;
    inline-size: var(--rs-unit-x4);
    block-size: var(--rs-unit-x4);
  }

  .rs-search > input {
    flex: 1;
    min-inline-size: 0;
    border: 0;
    outline: 0;
    background: transparent;
    color: var(--rs-color-foreground-neutral);
    font: inherit;
    font-size: var(--rs-font-size-body-3);
    line-height: var(--rs-line-height-body-3);
  }

  .rs-search > input::placeholder {
    color: var(--rs-color-foreground-neutral-faded);
  }

  .rs-search > .rs-hotkey {
    flex: none;
  }

  /* ---- Sidebar nav ---- */
  .rs-nav {
    display: flex;
    flex-direction: column;
    gap: 2px;
  }

  .rs-nav__item {
    display: flex;
    align-items: center;
    gap: var(--rs-unit-x2);
    min-inline-size: 0;
    padding: var(--rs-unit-x2);
    border: 0;
    border-radius: var(--rs-radius-small);
    background: transparent;
    color: var(--rs-color-foreground-neutral);
    cursor: pointer;
    font: inherit;
    font-size: var(--rs-font-size-body-3);
    line-height: var(--rs-line-height-body-3);
    font-weight: var(--rs-font-weight-medium);
    text-align: start;
    text-decoration: none;
    transition: background-color var(--rs-duration-fast) var(--rs-easing-standard);
  }

  .rs-nav__item > .rs-icon {
    flex: none;
    inline-size: var(--rs-unit-x4);
    block-size: var(--rs-unit-x4);
    color: var(--rs-color-foreground-neutral-faded);
  }

  .rs-nav__item > span {
    flex: 1;
    min-inline-size: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .rs-nav__item__trail {
    flex: none;
    margin-inline-start: auto;
    color: var(--rs-color-foreground-neutral-faded);
    font-size: var(--rs-font-size-caption-1);
    font-variant-numeric: tabular-nums;
  }

  @media (hover: hover) and (pointer: fine) {
    .rs-nav__item:hover {
      background: var(--rs-color-background-neutral-faded);
    }
  }

  .rs-nav__item[aria-current],
  .rs-nav__item[aria-current="page"],
  .rs-nav__item.is-active {
    background: var(--rs-color-background-neutral-faded);
    color: var(--rs-color-foreground-neutral);
  }

  .rs-nav__item:is([aria-current], .is-active) > .rs-icon {
    color: var(--rs-color-foreground-primary);
  }

  .rs-nav__item:focus-visible {
    outline: 0;
    box-shadow: var(--rs-shadow-focus-inset);
  }

  /* ---- Content column ---- */
  .rs-content {
    display: flex;
    flex-direction: column;
    min-inline-size: 0;
    min-block-size: 0;
  }

  .rs-topbar {
    flex: none;
    display: flex;
    align-items: center;
    gap: var(--rs-unit-x3);
    min-block-size: calc(var(--rs-unit-x10) + var(--rs-unit-x4));
    padding: var(--rs-unit-x3) var(--rs-unit-x5);
    border-block-end: 1px solid var(--rs-color-border-neutral-faded);
    background: var(--rs-color-background-page);
  }

  .rs-topbar__title {
    font-size: var(--rs-font-size-body-1);
    line-height: var(--rs-line-height-body-1);
    font-weight: var(--rs-font-weight-semibold);
  }

  .rs-topbar__spacer {
    flex: 1;
  }

  .rs-content__body {
    flex: 1;
    min-block-size: 0;
    overflow-y: auto;
    padding: var(--rs-unit-x6);
  }

  /* ---- JS-free dropdown menu (native <details> disclosure) ---- */
  .rs-dropdown-menu {
    position: relative;
  }

  .rs-dropdown-menu > summary {
    display: block;
    list-style: none;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
  }

  .rs-dropdown-menu > summary::-webkit-details-marker {
    display: none;
  }

  .rs-dropdown-menu > summary:focus-visible {
    outline: 0;
  }

  .rs-dropdown-menu__popover {
    position: absolute;
    inset-block-start: calc(100% + var(--rs-unit-x1));
    inset-inline-start: 0;
    min-inline-size: 100%;
    z-index: var(--rs-z-index-fixed);
    border: 1px solid var(--rs-color-border-neutral-faded);
    border-radius: var(--rs-radius-medium);
    background: var(--rs-color-background-elevation-overlay);
    box-shadow: var(--rs-shadow-overlay);
  }

  .rs-dropdown-menu[data-align="end"] .rs-dropdown-menu__popover {
    inset-inline: auto 0;
  }

  .rs-dropdown-menu[data-direction="up"] .rs-dropdown-menu__popover {
    inset-block: auto calc(100% + var(--rs-unit-x1));
  }

  .rs-dropdown-menu:not([open]) .rs-dropdown-menu__popover {
    display: none;
  }
}