@layer sheet {
  .app-bar {
    --menu-shadow: 0 1px 2px 0 rgb(60 64 67 / 30%), 0 2px 6px 2px rgb(60 64 67 / 15%);
    --menu-hover: #f1f3f4;
    --menu-disabled: rgb(31 31 31 / 38%);
    --star: #fbbc04;

    position: relative;
    z-index: 20;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 16px 2px;
    background: var(--surface-chrome);
    font-family: var(--font-chrome);
    white-space: nowrap;
  }

  .app-bar__logo {
    flex: none;
    inline-size: 36px;
    block-size: 36px;
  }

  .app-bar__document {
    flex: none;
    display: flex;
    flex-direction: column;
    gap: 2px;
  }

  .app-bar__title-row {
    --icon-size: 18px;

    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--icon-color);
  }

  /* The document's name is a field that reads as text until it's hovered or clicked, like Sheets'. */
  .app-bar__title {
    field-sizing: content;
    min-inline-size: 1ch;
    max-inline-size: 40vw;
    block-size: 24px;
    padding: 0 6px;
    border: 1px solid transparent;
    border-radius: 4px;
    outline: none;
    background: none;
    font: 18px var(--font-chrome);
    color: var(--text-primary);
    text-overflow: ellipsis;

    &:hover {
      border-color: var(--text-primary);
    }

    &:focus {
      border-color: transparent;
      outline: 2px solid var(--blue-700);
      outline-offset: -1px;
    }
  }

  .app-bar__status-icon + .app-bar__status-icon {
    margin-inline-start: 8px;
  }

  .app-bar__star {
    display: grid;
    place-items: center;
    inline-size: 26px;
    block-size: 26px;
    margin-inline: -4px;
    border-radius: 50%;
    cursor: pointer;

    &:hover {
      background: var(--hover-chrome);
    }

    & + .app-bar__status-icon {
      margin-inline-start: 4px;
    }
  }

  .app-bar__star-filled,
  .app-bar__star[aria-pressed=true] .app-bar__star-outline {
    display: none;
  }

  .app-bar__star[aria-pressed=true] .app-bar__star-filled {
    display: block;
    color: var(--star);
  }

  .menu-bar {
    display: flex;
    font-size: 14px;
  }

  .menu-bar__menu {
    position: relative;
  }

  .menu-bar__item {
    padding: 2px 7px;
    border-radius: 4px;
    cursor: default;

    &:hover,
    &[aria-expanded=true] {
      background: var(--hover-chrome);
    }

    &:focus-visible {
      outline: 2px solid var(--blue-700);
      outline-offset: -2px;
    }
  }

  /* Dropdowns: white cards with Sheets' elevation. Items keep a gutter on the left for
     check marks and the shortcut, a hint or a submenu arrow on the right. */
  .menu-bar__dropdown {
    --icon-size: 20px;

    position: absolute;
    inset-block-start: calc(100% + 4px);
    inset-inline-start: 0;
    z-index: 30;
    min-inline-size: 280px;
    padding-block: 6px;
    overflow-y: auto;
    overscroll-behavior: contain;
    border-radius: 4px;
    background: var(--white);
    box-shadow: var(--menu-shadow);
    color: var(--text-primary);
    outline: none;

    .menu-bar__dropdown {
      position: fixed;
      inset: auto;
      min-inline-size: 220px;
    }
  }

  .menu-bar__entry {
    display: flex;
    align-items: center;
    gap: 8px;
    inline-size: 100%;
    block-size: 32px;
    padding: 0 16px 0 12px;
    font: 14px var(--font-chrome);
    color: inherit;
    text-align: start;
    text-decoration: none;
    white-space: nowrap;
    cursor: default;
    outline: none;

    &:hover,
    &:focus,
    &[aria-expanded=true] {
      background: var(--menu-hover);
      color: inherit;
    }

    &[aria-disabled=true] {
      color: var(--menu-disabled);

      &:hover,
      &:focus {
        background: none;
      }
    }
  }

  .menu-bar__check {
    flex: none;
    display: grid;
    inline-size: 24px;
    visibility: hidden;

    [aria-checked=true] > & {
      visibility: visible;
    }
  }

  .menu-bar__label {
    flex: 1;
    padding-inline-end: 24px;
  }

  .menu-bar__hint,
  .menu-bar__shortcut {
    color: var(--text-secondary);
    font: inherit;

    [aria-disabled=true] > & {
      color: inherit;
    }
  }

  .menu-bar__hint + .menu-bar__shortcut {
    margin-inline-start: 12px;
  }

  .menu-bar__arrow {
    --icon-size: 18px;

    margin-inline-end: -6px;
    color: var(--text-secondary);

    [aria-disabled=true] > & {
      color: inherit;
    }
  }

  .menu-bar__separator {
    margin-block: 6px;
    border-block-start: 1px solid var(--border-subtle);
  }

  /* Dialogs opened from the menus (keyboard shortcuts, link, comment). */
  .menu-dialog {
    inline-size: min(560px, calc(100vw - 32px));
    max-block-size: calc(100dvh - 64px);
    margin: auto;
    padding: 0;
    border: 0;
    border-radius: 8px;
    background: var(--white);
    box-shadow: var(--menu-shadow);
    font-family: var(--font-chrome);
    color: var(--text-primary);
    white-space: normal;

    &::backdrop {
      background: rgb(32 33 36 / 60%);
    }
  }

  .menu-dialog--shortcuts[open] {
    inline-size: min(760px, calc(100vw - 32px));
    display: flex;
    flex-direction: column;
  }

  .menu-dialog__header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 16px 16px 24px;
    border-block-end: 1px solid var(--border-subtle);
  }

  .menu-dialog__title {
    font-size: 22px;
    font-weight: 400;

    .menu-dialog--shortcuts & {
      flex: 1;
    }
  }

  .menu-dialog__search,
  .menu-dialog__input {
    block-size: 36px;
    padding-inline: 12px;
    border: 1px solid var(--border-control);
    border-radius: 4px;
    font: 14px var(--font-chrome);
    color: inherit;

    &:focus {
      border-color: transparent;
      outline: 2px solid var(--blue-700);
    }
  }

  .menu-dialog__search {
    inline-size: 260px;
  }

  .menu-dialog__close {
    --icon-size: 24px;

    display: grid;
    place-items: center;
    inline-size: 40px;
    block-size: 40px;
    border-radius: 50%;
    color: var(--icon-color);
    cursor: pointer;

    &:hover {
      background: var(--hover-chrome);
    }
  }

  .menu-dialog__body {
    overflow-y: auto;
    padding: 8px 24px 24px;
    columns: 2 300px;
    column-gap: 40px;
  }

  .menu-dialog__group {
    break-inside: avoid;
    padding-block-start: 16px;
  }

  .menu-dialog__group-title {
    margin-block-end: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--blue-700);
  }

  .menu-dialog__shortcut {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    padding-block: 7px;
    border-block-end: 1px solid var(--grey-100);
    font-size: 14px;
  }

  .menu-dialog__keys {
    flex: none;
    font: inherit;
    color: var(--text-secondary);
  }

  .menu-dialog--prompt form {
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding: 24px;
  }

  .menu-dialog__buttons {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
  }

  .menu-dialog__button {
    block-size: 36px;
    padding-inline: 24px;
    border-radius: 18px;
    font: 500 14px var(--font-chrome);
    color: var(--blue-700);
    cursor: pointer;

    &:hover {
      background: var(--blue-50);
    }
  }

  .menu-dialog__button--primary {
    background: var(--blue-700);
    color: var(--white);

    &:hover {
      background: var(--blue-600);
    }
  }

  .app-bar__actions {
    margin-inline-start: auto;
    min-inline-size: 0;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 6px;
  }

  .app-bar__round-button,
  .app-bar__meet-button {
    --icon-size: 24px;

    block-size: 40px;
    color: var(--icon-color);

    &:hover {
      background: var(--hover-chrome);
    }
  }

  .app-bar__round-button {
    inline-size: 40px;
    display: grid;
    place-items: center;
    border-radius: 50%;
  }

  .app-bar__meet-button {
    display: flex;
    align-items: center;
    padding: 0 4px 0 8px;
    border-radius: 20px;

    .icon:last-child {
      --icon-size: 20px;
    }
  }

  /* Pill buttons on the right: the split "Build anyway" CTA and the tonal link. */
  .app-bar__build-button,
  .app-bar__real-sheet-button {
    flex: none;
    display: flex;
    align-items: center;
    block-size: 40px;
    margin-inline-start: 8px;
    border-radius: 20px;
    font: 500 14px var(--font-chrome);
    text-decoration: none;
  }

  .app-bar__sign-in {
    flex: none;
    margin-inline-start: 8px;
  }

  .app-bar__sign-in-button {
    block-size: 40px;
    padding-inline: 16px;
    border-radius: 20px;
    color: var(--blue-700);
    font: 500 14px var(--font-chrome);

    &:hover {
      background: var(--hover-chrome);
    }
  }

  .app-bar__build-button {
    overflow: hidden;
    background: var(--sky-200);

    &,
    &:hover {
      color: var(--navy-900);
    }

    &:hover {
      background: var(--sky-250);
    }
  }

  .app-bar__build-label {
    display: flex;
    align-items: center;
    gap: 8px;
    block-size: 100%;
    padding: 0 14px 0 12px;
  }

  .app-bar__build-caret {
    display: flex;
    align-items: center;
    block-size: 100%;
    padding: 0 8px 0 6px;
    border-inline-start: 1px solid var(--surface-chrome);
  }

  .app-bar__real-sheet-button {
    padding-inline: 20px;
    background: var(--blue-100);

    &,
    &:hover {
      color: var(--blue-700);
    }

    &:hover {
      background: var(--blue-150);
    }
  }
}

/* Phones: logo, name and a Start pill. The rest of the chrome is desktop-only. */
@layer sheet {
  @media (width <= 600px) {
    .app-bar {
      block-size: 52px;
      gap: 10px;
      padding: 0 6px 0 14px;
    }

    .app-bar__logo {
      inline-size: 30px;
      block-size: 30px;
    }

    .app-bar__document {
      flex: 1;
      min-inline-size: 0;
    }

    .app-bar__title {
      padding-inline: 0;
      font-size: 17px;
    }

    .app-bar__status-icon,
    .menu-bar,
    .app-bar__round-button,
    .app-bar__meet-button,
    .app-bar__real-sheet-button,
    .app-bar__build-caret,
    .app-bar__build-rest {
      display: none;
    }

    .app-bar__sign-in {
      margin-inline-start: 0;
    }

    .app-bar__sign-in-button {
      block-size: 36px;
      padding-inline: 12px;
    }

    .app-bar__build-button {
      block-size: 36px;
      margin-inline-start: 0;
      border-radius: 18px;
    }

    .app-bar__build-label {
      gap: 6px;
      padding: 0 14px 0 10px;
    }
  }
}