/* CUBE: block — top application bar. White chrome, brand mark, real tabs,
   a Manage menu for admin links, device/online chip, and an avatar menu. */

.app-bar {
  display: flex;
  align-items: center;
  gap: var(--space-3xs);
  block-size: var(--app-bar-height);
  padding-inline: var(--space-s);
  background: var(--color-surface);
  border-block-end: 1px solid var(--color-border);
  position: sticky;
  inset-block-start: 0;
  z-index: var(--z-sticky);
}

.app-bar__brand {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding-inline-end: var(--space-m);
  margin-inline-end: var(--space-2xs);
  border-inline-end: 1px solid var(--color-border-subtle);
  text-decoration: none;
  color: var(--color-fg);
}

.app-bar__logo {
  display: flex;
  align-items: center;
  justify-content: center;
  inline-size: var(--brand-mark);
  block-size: var(--brand-mark);
  border-radius: var(--radius-s);
  background: var(--color-primary);
  color: var(--color-on-primary);
  font-size: var(--fs-xs);
  font-weight: 700;
}

.app-bar__name { font-size: var(--fs-md); font-weight: 600; }

.app-bar__tab {
  display: inline-flex;
  align-items: center;
  block-size: var(--icon-btn);
  min-block-size: var(--icon-btn);
  padding-inline: var(--space-s);
  background: transparent;
  color: var(--color-fg);
  border: 0;
  border-radius: var(--radius-s);
  box-shadow: none;
  font-size: var(--fs-sm);
  font-weight: 500;
  text-decoration: none;
}
.app-bar__tab:hover:not(:disabled) { background: var(--color-border-subtle); }
.app-bar__tab[aria-current] { background: var(--color-primary-soft); color: var(--color-primary-ink); font-weight: 600; }

.app-bar__menu-wrap { position: relative; }
.app-bar__menu-wrap > summary { list-style: none; cursor: pointer; }
.app-bar__menu-wrap > summary::-webkit-details-marker { display: none; }
.app-bar__menu-wrap > summary:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }

.app-bar__menu-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2xs);
  block-size: var(--icon-btn);
  min-block-size: var(--icon-btn);
  padding-inline: var(--space-s);
  background: transparent;
  color: var(--color-fg);
  border: 0;
  border-radius: var(--radius-s);
  box-shadow: none;
  font-size: var(--fs-sm);
  font-weight: 500;
}
.app-bar__menu-btn:hover:not(:disabled) { background: var(--color-border-subtle); }
.app-bar__menu-btn[aria-current] { background: var(--color-primary-soft); color: var(--color-primary-ink); font-weight: 600; }
.app-bar__caret { font-size: var(--fs-2xs); opacity: 0.6; }

.app-bar__menu {
  position: absolute;
  inset-block-start: calc(100% + var(--space-2xs));
  inset-inline-start: 0;
  min-inline-size: 13.5rem;
  padding: var(--space-2xs);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-m);
  box-shadow: var(--shadow-md);
  z-index: var(--z-menu);
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.app-bar__menu-item {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  inline-size: 100%;
  block-size: var(--control-h);
  min-block-size: var(--control-h);
  padding-inline: var(--space-xs);
  background: transparent;
  color: var(--color-fg);
  border: 0;
  border-radius: var(--radius-s);
  box-shadow: none;
  font-size: var(--fs-sm);
  font-weight: 500;
  text-align: start;
  justify-content: flex-start;
  text-decoration: none;
}
.app-bar__menu-item:hover:not(:disabled) { background: var(--color-surface-muted); }
.app-bar__menu-item[aria-current] { background: var(--color-primary-soft); color: var(--color-primary-ink); font-weight: 600; }
.app-bar__menu-item > .icon { color: var(--color-muted); }

.app-bar__spacer { margin-inline-start: auto; }

.app-bar__chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2xs);
  block-size: var(--icon-btn-sm);
  padding-inline: var(--space-xs);
  border-radius: var(--radius-pill);
  background: var(--color-border-subtle);
  color: var(--color-fg);
  font-size: var(--fs-xs);
  font-weight: 500;
}
.app-bar__dot {
  inline-size: var(--dot);
  block-size: var(--dot);
  border-radius: var(--radius-pill);
  background: var(--color-primary);
}
.app-bar__chip[data-online="false"] .app-bar__dot { background: var(--color-warn); }

.app-bar__avatar-btn {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  block-size: var(--icon-btn);
  min-block-size: var(--icon-btn);
  padding-inline: var(--space-2xs);
  background: transparent;
  color: var(--color-fg);
  border: 0;
  border-radius: var(--radius-pill);
  box-shadow: none;
}
.app-bar__avatar-btn:hover:not(:disabled) { background: var(--color-border-subtle); }

.app-bar__avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  inline-size: var(--avatar);
  block-size: var(--avatar);
  border-radius: var(--radius-pill);
  background: var(--color-primary-soft);
  color: var(--color-primary-ink);
  font-size: var(--fs-2xs);
  font-weight: 600;
}
.app-bar__avatar-name { font-size: var(--fs-sm); font-weight: 500; }

.app-bar__user-menu {
  position: absolute;
  inset-block-start: calc(100% + var(--space-2xs));
  inset-inline-end: var(--space-s);
  inline-size: 14.5rem;
  padding: var(--space-2xs);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-m);
  box-shadow: var(--shadow-md);
  z-index: var(--z-menu);
}
.app-bar__user-head {
  padding: var(--space-xs);
  border-block-end: 1px solid var(--color-border-subtle);
  margin-block-end: var(--space-3xs);
}
.app-bar__user-email { font-size: var(--fs-sm); font-weight: 600; }
.app-bar__user-meta { font-size: var(--fs-xs); color: var(--color-muted); }
.app-bar__user-item {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  inline-size: 100%;
  block-size: var(--control-h);
  min-block-size: var(--control-h);
  padding-inline: var(--space-xs);
  background: transparent;
  color: var(--color-fg);
  border: 0;
  border-radius: var(--radius-s);
  box-shadow: none;
  font-size: var(--fs-sm);
  font-weight: 500;
  text-align: start;
  justify-content: flex-start;
  text-decoration: none;
}
.app-bar__user-item:hover:not(:disabled) { background: var(--color-surface-muted); }
.app-bar__user-item--danger { color: var(--color-danger); }
.app-bar__user-item--danger:hover:not(:disabled) { background: var(--color-danger-soft); }