@layer components {
  ul.app-notification-dropdown {
    padding: 0;
    --app-notification-text: var(--app-dropdown-color);
    --app-notification-muted: var(--app-muted-color);
    --app-notification-hover: var(--app-dropdown-hover-background-color);
    --app-notification-border: var(--app-dropdown-border-color);
    --app-notification-focus: var(--app-primary-focus);
  }

  /* Dropdown sizing — must out-specify the global
     `details.dropdown > summary + ul { width: 100%; min-width: fit-content }`
     rule in app-shell.css, otherwise the content's intrinsic width wins and
     the dropdown overflows the viewport on mobile. */
  .app-header details.dropdown > summary + ul.app-notification-dropdown {
    width: min(360px, calc(100vw - var(--app-spacing) * 2));
    max-width: min(360px, calc(100vw - var(--app-spacing) * 2));
    min-width: 0;
  }

  /* Below md, the bell is NOT the rightmost topbar item (bookmark / tenant /
     account sit to the right of it). Anchoring the dropdown with `right: 0`
     relative to the bell's <details> therefore lands its left edge off-viewport
     on narrow screens. Switch to viewport-anchored `position: fixed` so the
     dropdown hugs the viewport's right edge instead of the bell. */
  @media (max-width: 767px) {
    .app-header details.dropdown > summary + ul.app-notification-dropdown {
      position: fixed;
      top: var(--app-topbar-height);
      right: var(--app-spacing);
      left: auto;
      inset-inline-end: var(--app-spacing);
      inset-inline-start: auto;
    }
  }

  .app-notification-dropdown__header {
    padding: 12px 16px;
    border-bottom: 1px solid var(--app-notification-border);
  }

  .app-notification-dropdown__title {
    font-size: 14px;
    font-weight: 600;
    color: var(--app-notification-text);
  }

  .app-notification-dropdown__mark-all {
    background: none;
    border: none;
    color: var(--app-primary);
    font-size: 11px;
    cursor: pointer;
    padding: 0;
  }

  .app-notification-dropdown__mark-all:hover {
    text-decoration: underline;
  }

  .app-notification-dropdown__body {
    overflow-y: auto;
    max-height: 400px;
    padding: 0;
  }

  .app-notification-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 10px 16px;
    border-bottom: 1px solid var(--app-notification-border);
    cursor: pointer;
    transition: background 0.15s;
    color: var(--app-notification-text);
  }

  /* Keep row-link notifications visually stable despite global role-based styles. */
  .app-notification-item--link {
    margin: 0;
    border: 0;
    border-radius: 0;
    border-bottom: 1px solid var(--app-notification-border);
    outline: 0;
    background: transparent;
    box-shadow: none;
    color: var(--app-notification-text);
    font: inherit;
    font-weight: inherit;
    line-height: inherit;
    text-align: left;
    text-decoration: none;
  }

  .app-notification-item--link:is(:hover, :active, :focus) {
    background: var(--app-notification-hover);
    box-shadow: none;
    color: var(--app-notification-text);
  }

  .app-notification-item--link:focus-visible {
    outline: 2px solid var(--app-notification-focus);
    outline-offset: -2px;
  }

  .app-notification-item:hover {
    background: var(--app-notification-hover);
  }

  .app-notification-item--unread {
    border-left: 3px solid var(--app-primary);
  }

  .app-notification-item__icon {
    flex-shrink: 0;
    font-size: 16px;
    margin-top: 2px;
    color: var(--app-notification-muted);
  }

  .app-notification-item--unread .app-notification-item__icon {
    color: var(--app-primary);
  }

  .app-notification-item__content {
    flex: 1;
    min-width: 0;
  }

  .app-notification-item__title {
    font-size: 13px;
    font-weight: 500;
    color: var(--app-notification-text);
    line-height: 1.3;
    margin: 0 0 2px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .app-notification-item__body {
    font-size: 12px;
    color: var(--app-notification-muted);
    line-height: 1.3;
    margin: 0 0 2px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .app-notification-item__time {
    font-size: 11px;
    color: var(--app-notification-muted);
  }

  .app-notification-item__actions {
    flex-shrink: 0;
    display: flex;
    gap: 4px;
    opacity: 0;
    transition: opacity 0.15s;
  }

  .app-notification-item:hover .app-notification-item__actions,
  .app-notification-item:focus-within .app-notification-item__actions {
    opacity: 1;
  }

  .app-notification-item__action-btn {
    background: none;
    border: none;
    color: var(--app-notification-muted);
    font-size: 14px;
    cursor: pointer;
    padding: 2px;
    line-height: 1;
    border-radius: 4px;
  }

  .app-notification-item__action-btn:hover {
    color: var(--app-notification-text);
    background: var(--app-notification-border);
  }

  .app-notification-loading,
  .app-notification-error {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 24px 16px;
    font-size: 13px;
    color: var(--app-notification-muted);
  }

  .app-notification-error {
    color: var(--app-danger, #c0392b);
  }

  .app-notification-loading__spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid var(--app-notification-border);
    border-top-color: var(--app-primary);
    border-radius: 50%;
    animation: app-notification-spin 0.6s linear infinite;
  }

  @keyframes app-notification-spin {
    to { transform: rotate(360deg); }
  }
}