@layer surfaces {
  :where(.popover, .menu-popover, .document-info-popover) {
    box-sizing: border-box;
  }

  .popover,
  .menu-popover,
  .document-info-popover,
  .tooltip {
    color: var(--text);
    margin: 0;
    padding: var(--space-cluster);
    z-index: var(--z-popover);
  }

  .popover:not(.document-info-popover):not(:popover-open),
  .menu-popover:not(:popover-open),
  .document-info-popover:not(:popover-open):not(.is-open):not(.is-closing) { display: none; }

  .popover,
  .document-info-popover { inline-size: min(320px, calc(100vw - 32px)); }
  .menu-popover { inline-size: min(240px, calc(100vw - 32px)); }

  .popover-header {
    align-items: center;
    border-block-end: 1px solid color-mix(in srgb, var(--border) 54%, transparent);
    display: flex;
    justify-content: space-between;
    margin-block-end: var(--space-cluster);
    padding-block-end: var(--space-related);
  }

  .popover-title {
    font-size: var(--ui-font-size);
    font-weight: 700;
    line-height: 1.25;
  }

  .popover-field { display: grid; gap: var(--space-related); margin-block-end: var(--space-cluster); }
  .popover-label { color: var(--text-muted); font-size: var(--ui-font-size); }
  .popover-section-label { border-block-start: 1px solid var(--border); color: var(--text); display: block; font-size: var(--ui-font-size); font-weight: var(--ui-font-weight-strong); margin-block-start: var(--space-related); padding-block-start: var(--space-related); }
  .popover-help-text { color: var(--text-muted); font-size: var(--ui-font-size); line-height: 1.4; margin: 0; }
  .popover-input { inline-size: 100%; }

  .popover-actions {
    align-items: center;
    border-block-start: 1px solid color-mix(in srgb, var(--border) 54%, transparent);
    display: flex;
    gap: var(--space-related);
    justify-content: flex-end;
    margin-block-start: var(--space-cluster);
    padding-block-start: var(--space-related);
  }

  .popover-icon-button { inline-size: var(--control-height); padding: 0; }

  .document-info-popover {
    --document-info-card-bg: var(--panel-card-bg);
    --document-info-card-border: var(--panel-card-border);
    --document-info-card-border-hover: var(--panel-card-border-hover);
    --document-info-card-radius: var(--shape-card);
    --document-info-control-surface: var(--panel-control-surface);
    --document-info-control-surface-hover: var(--panel-control-surface-hover);
    --document-info-control-border: var(--panel-control-border);
    --document-info-control-border-hover: var(--panel-control-border-hover);
    --document-info-label-text: color-mix(in srgb, var(--text) 70%, var(--text-muted));
    --document-info-muted-text: color-mix(in srgb, var(--text) 58%, var(--text-muted));
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
    background: var(--surface-inspector-shell);
    border: 1px solid var(--surface-inspector-shell-border);
    border-radius: var(--shape-panel);
    box-shadow: var(--surface-inspector-shell-shadow);
    color: var(--text);
    font-family: var(--font-ui);
    font-size: var(--ui-font-size);
    inline-size: min(320px, calc(100vw - 32px));
    inset-block-start: var(--document-info-popover-top, calc(var(--app-safe-top) + var(--topbar-h) + var(--space-related)));
    inset-inline-start: var(--document-info-popover-left, 50%);
    line-height: var(--ui-line-height);
    max-block-size: calc(100dvh - var(--document-info-popover-top, 80px) - var(--space-section));
    overflow: auto;
    overscroll-behavior: contain;
    padding: var(--space-related);
    position: fixed;
    transform-origin: top center;
    will-change: opacity, transform, filter;
    -webkit-overflow-scrolling: touch;
  }

  .document-info-popover-header {
    align-items: center;
    border-block-end: 0;
    display: flex;
    gap: var(--space-related);
    justify-content: space-between;
    padding: var(--space-tight) var(--space-tight) var(--space-related) var(--space-related);
  }

  .document-info-popover-header .popover-title {
    color: var(--text);
    font-family: var(--font-ui);
    font-size: var(--ui-font-size);
    font-weight: var(--ui-font-weight-strong);
    letter-spacing: -0.012em;
    line-height: var(--type-line-heading);
    margin: 0;
    min-inline-size: 0;
    padding: 0;
  }

  .document-info-popover-header .popover-title:focus-visible {
    border-radius: var(--shape-panel);
    box-shadow: var(--focus-ring-shadow);
    outline: 0;
  }

  .document-info-close {
    block-size: var(--sidebar-close-button-size, var(--control-block-size));
    flex: 0 0 var(--sidebar-close-button-size, var(--control-block-size));
    inline-size: var(--sidebar-close-button-size, var(--control-block-size));
    min-block-size: var(--sidebar-close-button-size, var(--control-block-size));
    min-inline-size: var(--sidebar-close-button-size, var(--control-block-size));
  }

  .document-info-close svg {
    block-size: 16px;
    inline-size: 16px;
  }

  .document-info-popover-body { display: grid; gap: var(--space-cluster); }

  .document-info-popover-card,
  .document-info-popover-list {
    background: var(--document-info-card-bg);
    border: 1px solid var(--document-info-card-border);
    border-radius: var(--document-info-card-radius);
    box-shadow: var(--elevation-soft);
  }

  .document-info-popover-list {
    display: grid;
    gap: 0;
    margin: 0;
    overflow: hidden;
    padding: 0;
  }

  .document-info-popover-field {
    display: grid;
    gap: var(--space-related);
    padding: var(--space-cluster);
  }

  .document-info-title-input {
    background: var(--document-info-control-surface);
    border-color: var(--document-info-control-border);
    inline-size: 100%;
  }

  .document-info-title-input:hover,
  .document-info-title-input:focus-visible {
    background: var(--document-info-control-surface-hover);
    border-color: var(--document-info-control-border-hover);
  }

  .document-info-popover-row {
    align-items: center;
    background: transparent;
    border: 0;
    border-block-start: 1px solid var(--document-info-card-border);
    display: grid;
    gap: var(--space-cluster);
    grid-template-columns: minmax(0, 1fr) auto;
    min-block-size: var(--control-block-size);
    padding: var(--space-tight) var(--space-cluster);
    transition:
      background-color var(--motion-duration-micro) var(--motion-ease-standard),
      border-color var(--motion-duration-micro) var(--motion-ease-standard);
  }

  .document-info-popover-row:first-child { border-block-start: 0; }

  .document-info-popover-row:hover {
    background: var(--panel-row-bg-hover);
  }

  .document-info-popover-label,
  .document-info-popover-value { line-height: 1.25; }
  .document-info-popover-label {
    color: var(--document-info-label-text);
    font-size: var(--ui-font-size);
    font-weight: var(--ui-font-weight);
  }
  .document-info-popover-value {
    color: var(--text);
    font-size: var(--ui-font-size);
    font-weight: var(--ui-font-weight-strong);
    margin: 0;
    text-align: end;
  }

  .menu-popover [role="menuitem"],
  .menu-popover button,
  .menu-popover a {
    border-radius: var(--shape-panel);
    min-block-size: var(--control-block-size);
  }

  .menu-popover [role="menuitem"]:focus-visible,
  .menu-popover button:focus-visible,
  .menu-popover a:focus-visible {
    outline: 0;
    box-shadow: var(--focus-ring-shadow);
  }

  .tooltip {
    align-items: center;
    box-sizing: border-box;
    border-radius: var(--shape-panel);
    display: none;
    font-size: var(--ui-font-size);
    gap: var(--space-related);
    max-inline-size: 240px;
    pointer-events: none;
    position: fixed;
  }

  .tooltip.is-visible { display: flex; }
  .tooltip-shortcut { color: var(--text-muted); }

  .local-state-launcher {
    bottom: calc(var(--app-safe-bottom) + var(--space-related));
    font-size: var(--ui-font-size);
    font-weight: var(--ui-font-weight-strong);
    left: calc(var(--app-safe-left) + var(--space-related));
    max-inline-size: min(220px, calc(100vw - var(--app-safe-left) - var(--app-safe-right) - 32px));
    overflow: hidden;
    position: fixed;
    text-overflow: ellipsis;
    white-space: nowrap;
    z-index: var(--z-tip);
  }

  .local-state-launcher[data-surface-boundary="app-shell"] { bottom: auto; }

  .local-state-switcher {
    inset: auto auto calc(var(--app-safe-bottom) + var(--space-related) + var(--control-height) + var(--space-tight)) calc(var(--app-safe-left) + var(--space-related));
  }

  .local-state-switcher[data-surface-boundary="app-shell"] { inset: auto; }

  .local-state-account-preview {
    background: var(--control-surface);
    border-color: var(--control-border);
    border-radius: var(--shape-card);
    padding: var(--space-related);
  }

  .local-state-grid { display: grid; gap: var(--space-related); }


  @media (max-width: 760px) {
    .document-info-popover[data-document-info-mode="sheet"] {
      border-start-end-radius: var(--shape-panel);
      border-start-start-radius: var(--shape-panel);
      inline-size: var(--document-info-popover-sheet-width, calc(100vw - var(--app-safe-left) - var(--app-safe-right) - 32px));
      inset-inline-start: var(--document-info-popover-left, calc(var(--app-safe-left) + var(--space-cluster)));
      max-block-size: calc(100dvh - var(--document-info-popover-top, 112px) - var(--app-safe-bottom) - var(--space-cluster));
      padding: var(--space-related);
      transform-origin: top center;
    }

    .document-info-popover[data-document-info-mode="sheet"] .document-info-popover-header {
      padding-block-start: var(--space-tight);
    }

    .document-info-popover[data-document-info-mode="sheet"] .document-info-popover-card,
    .document-info-popover[data-document-info-mode="sheet"] .document-info-popover-list {
      border-radius: var(--shape-card);
    }

    .document-info-popover[data-document-info-mode="sheet"] .document-info-popover-row,
    .document-info-popover[data-document-info-mode="sheet"] .document-info-popover-field {
      padding-inline: var(--space-cluster);
    }
  }
}

@layer components {
  :where(.popover, .menu-popover, .document-info-popover):popover-open {
    animation: compose-surface-reveal var(--motion-duration-surface) var(--motion-ease-out) both;
    transform-origin: top center;
  }

  .document-info-popover.is-open {
    animation: compose-surface-reveal var(--motion-duration-surface) var(--motion-ease-out) both;
    transform-origin: top center;
  }

  .document-info-popover[data-document-info-mode="sheet"]:popover-open {
    animation-name: compose-sheet-reveal;
  }

  .document-info-popover[data-document-info-mode="sheet"].is-open {
    animation-name: compose-sheet-reveal;
  }

  .document-info-popover.is-closing {
    animation: compose-surface-dismiss var(--motion-duration-exit) var(--motion-ease-in) both;
    pointer-events: none;
  }

  .tooltip.is-visible {
    animation: compose-surface-reveal var(--motion-duration-micro) var(--motion-ease-out) both;
  }

  @media (prefers-reduced-motion: reduce) {
    :where(.popover, .menu-popover, .document-info-popover):popover-open,
    .document-info-popover.is-open,
    .document-info-popover.is-closing,
    .tooltip.is-visible { animation-duration: var(--motion-duration-reduced); }
  }

  @media (forced-colors: active) {
    .document-info-popover,
    .document-info-popover-card,
    .document-info-popover-list,
    .document-info-popover-field,
    .document-info-popover-row {
      background: Canvas;
      border-color: ButtonText;
      color: CanvasText;
      forced-color-adjust: auto;
    }

    .document-info-popover-row:hover {
      background: Canvas;
      border-color: Highlight;
    }

    .document-info-popover-header .popover-title:focus-visible,
    .document-info-close:focus-visible {
      outline: 2px solid CanvasText;
      outline-offset: 2px;
    }
  }
}