/* ── Unified dropdown primitive ──
   Replaces native <select> menus with a consistently styled dropdown that
   respects the design system. Used for category pickers, primitive pickers,
   vocabulary pickers and any list-of-values picker across the app.

   Architecture:
   - `.ui-dropdown` wraps the trigger inline with the rest of the form.
   - `.ui-dropdown__menu` is portalled to <body> on open so modal overflow
     never clips it. Positioning is driven by JS (top/left/max-height).
   - Open state flows through `.is-open` on both trigger and menu. Native
     `<details>` attribute is reserved for in-flow accordions.
*/
.ui-dropdown {
  display: inline-block;
  min-width: 0;
  position: relative;
  width: 100%;
}

.ui-dropdown__trigger {
  align-items: center;
  background: var(--bg-card-soft);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  font-size: var(--text-sm);
  gap: var(--space-sm);
  justify-content: space-between;
  min-height: var(--control-h-lg);
  padding: 0 var(--space-sm);
  text-align: left;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
  width: 100%;
}

.ui-dropdown__trigger:hover {
  border-color: var(--border-strong);
}

.ui-dropdown__trigger:focus-visible {
  outline: var(--focus-outline);
  outline-offset: var(--focus-offset);
}

.ui-dropdown.is-open .ui-dropdown__trigger {
  background: var(--bg-card);
  border-color: var(--border-strong);
}

.ui-dropdown__trigger-label {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ui-dropdown__trigger-chevron {
  align-items: center;
  color: var(--text-muted);
  display: inline-flex;
  flex-shrink: 0;
  justify-content: center;
  transition: transform var(--transition-base);
}

.ui-dropdown__trigger-chevron svg {
  height: var(--icon-sm);
  width: var(--icon-sm);
}

.ui-dropdown.is-open .ui-dropdown__trigger-chevron {
  transform: rotate(180deg);
}

/* Portalled menu — lives in <body> so it escapes any modal overflow. */
.ui-dropdown__menu {
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-3xs);
  min-width: 12rem;
  opacity: 0;
  overflow-y: auto;
  padding: var(--space-2xs);
  pointer-events: none;
  position: fixed;
  transform: translateY(-4px);
  transition: opacity var(--transition-base), transform var(--transition-base);
  z-index: var(--z-popover);
}

.ui-dropdown__menu.is-open {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.ui-dropdown__menu--up.is-open {
  transform: translateY(0);
}

.ui-dropdown__option {
  align-items: center;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  font-size: var(--text-sm);
  gap: var(--space-sm);
  min-height: var(--control-h-md);
  padding: 0 var(--space-sm);
  text-align: left;
  transition: background-color var(--transition-fast), color var(--transition-fast);
  width: 100%;
}

.ui-dropdown__option:hover {
  background: var(--bg-hover);
}

.ui-dropdown__option.is-selected {
  background: var(--bg-accent-soft);
  color: var(--text-primary);
  font-weight: 600;
}

.ui-dropdown__option-icon {
  align-items: center;
  color: var(--text-muted);
  display: inline-flex;
  flex-shrink: 0;
  justify-content: center;
}

.ui-dropdown__option-icon svg {
  height: var(--icon-sm);
  width: var(--icon-sm);
}

.ui-dropdown__option-label {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ui-dropdown__option-meta {
  color: var(--text-muted);
  flex-shrink: 0;
  font-size: var(--text-xs);
}

.ui-dropdown__empty {
  color: var(--text-muted);
  font-size: var(--text-xs);
  margin: 0;
  padding: var(--space-sm);
  text-align: center;
}