/* Material Design 3 Dropdown Component
 * ==========================================================================
 * MD3 Dropdowns provide contextual options triggered by icons/avatars
 * Can appear as dropdown (below) or dropup (above) based on position
 * Uses inverse layer for better contrast
 */

/* Dropdown Container
 * -------------------------------------------------------------------------- */

.dropdown {
  /* Structure */
  position: relative;
  display: inline-block;
}

/* Dropdown Trigger (Icon/Avatar)
 * -------------------------------------------------------------------------- */

.dropdown__trigger {
  /* Structure */
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;

  /* Appearance */
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 50%;
  transition: background-color 200ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Reset button styles */
  font: inherit;
  color: inherit;
  outline: none;
}

/* Trigger hover state */
.dropdown__trigger:hover {
  background-color: oklch(from var(--color-ink--surface) l c h / 0.08);
}

/* Trigger focus state */
.dropdown__trigger:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Active/open state */
.dropdown--open .dropdown__trigger {
  background-color: oklch(from var(--color-ink--surface) l c h / 0.12);
}

/* Avatar trigger variant */
.dropdown__trigger--avatar {
  padding: 0;
  overflow: hidden;
  border-radius: 50%;
}

.dropdown__trigger--avatar .avatar {
  pointer-events: none;
}

/* Icon trigger variant */
.dropdown__trigger--icon {
  width: 40px;
  height: 40px;
  color: var(--color-ink--surface);
}

.dropdown__trigger--icon svg {
  width: 24px;
  height: 24px;
}

/* Dropdown Menu (Inverse layer)
 * -------------------------------------------------------------------------- */

.dropdown__menu {
  /* Structure */
  position: absolute;
  z-index: var(--layer-dropdown);

  /* Default positioning (dropdown) */
  top: calc(100% + 4px);
  right: 0; /* Default to right alignment */

  /* Sizing */
  min-width: 200px;
  max-width: 360px;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
  overflow-x: hidden;
  padding: 0.5rem 0;

  /* Appearance - Inverse layer */
  background: var(--color-bg--inverse);
  color: var(--color-ink--inverse);
  border-radius: var(--radius-medium);
  box-shadow:
    0px 2px 8px oklch(from var(--color-shadow) l c h / 0.15),
    0px 4px 16px oklch(from var(--color-shadow) l c h / 0.1);
  border: 1px solid var(--color-border--light);

  /* Animation */
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all 200ms cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
}

/* Open state */
.dropdown--open .dropdown__menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

/* Dropup variant (menu appears above) */
.dropdown--dropup .dropdown__menu {
  top: auto;
  bottom: calc(100% + 4px);
  transform: translateY(8px);
}

.dropdown--dropup.dropdown--open .dropdown__menu {
  transform: translateY(0);
}

/* Right-aligned variant */
.dropdown--right .dropdown__menu {
  left: auto;
  right: 0;
}

/* Left-aligned variant (explicit, though it's the default) */
.dropdown--left .dropdown__menu {
  left: 0;
  right: auto;
}

/* Center-aligned variant */
.dropdown--center .dropdown__menu {
  right: auto;
  left: 50%;
  transform: translateX(-50%) translateY(-8px);
}

.dropdown--center.dropdown--open .dropdown__menu {
  transform: translateX(-50%) translateY(0);
}

/* Dropdown Menu Sections
 * -------------------------------------------------------------------------- */

.dropdown__header {
  padding: 0.375rem 1rem 0.25rem;
  border-bottom: 1px solid oklch(from var(--color-ink--inverse) l c h / 0.12);
  margin-bottom: 0.25rem;
}

.dropdown__title {
  margin: 0;
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  opacity: 0.7;
}

.dropdown__content {
  padding: 0;
}

.dropdown__footer {
  padding: 0.5rem 1rem;
  border-top: 1px solid oklch(from var(--color-ink--inverse) l c h / 0.12);
  margin-top: 0.5rem;
}

/* Dropdown Items
 * -------------------------------------------------------------------------- */

.dropdown__item {
  /* Structure */
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;

  /* Appearance */
  padding: 0.625rem 1rem;
  background: transparent;
  color: var(--color-ink--inverse);
  text-decoration: none;
  text-align: left;
  font-size: 0.875rem;
  line-height: 1.25rem;
  border: none;
  cursor: pointer;
  transition: background-color 200ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Reset button styles */
  font-family: inherit;
}

.dropdown__item:hover:not(:disabled) {
  background-color: oklch(from var(--color-ink--inverse) l c h / 0.08);
}

.dropdown__item:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: -2px;
}

.dropdown__item:active:not(:disabled) {
  background-color: oklch(from var(--color-ink--inverse) l c h / 0.12);
}

/* Disabled state */
.dropdown__item:disabled {
  opacity: 0.38;
  cursor: not-allowed;
}

/* Selected state */
.dropdown__item--selected {
  background-color: oklch(from var(--color-primary--inverse) l c h / 0.12);
  color: var(--color-primary--inverse);
}

/* Danger/destructive variant */
.dropdown__item--danger {
  color: var(--color-error--inverse);
}

.dropdown__item--danger:hover:not(:disabled) {
  background-color: oklch(from var(--color-error--inverse) l c h / 0.08);
}

/* Item with icon */
.dropdown__item-icon {
  width: 20px;
  height: 20px;
  opacity: 0.6;
  flex-shrink: 0;
}

.dropdown__item:hover .dropdown__item-icon {
  opacity: 1;
}

/* Item text */
.dropdown__item-text {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Item badge/chip */
.dropdown__item-badge {
  margin-left: auto;
  padding: 2px 8px;
  background: oklch(from var(--color-ink--inverse) l c h / 0.12);
  color: var(--color-ink--inverse);
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 500;
  flex-shrink: 0;
  white-space: nowrap;
}

/* Divider between items */
.dropdown__divider {
  height: 1px;
  margin: 0.5rem 1rem;
  background: oklch(from var(--color-ink--inverse) l c h / 0.12);
}

/* User info section (for user menus) */
.dropdown__user {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid oklch(from var(--color-ink--inverse) l c h / 0.12);
  margin-bottom: 0.5rem;
}

.dropdown__user-avatar {
  flex-shrink: 0;
}

.dropdown__user-info {
  flex: 1;
  min-width: 0;
}

.dropdown__user-name {
  font-weight: 500;
  font-size: 0.875rem;
  line-height: 1.25rem;
  color: var(--color-ink--inverse);
}

.dropdown__user-email {
  font-size: 0.75rem;
  line-height: 1rem;
  color: var(--color-ink--inverse);
  opacity: 0.7;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Backdrop (optional for mobile)
 * -------------------------------------------------------------------------- */

.dropdown__backdrop {
  position: fixed;
  inset: 0;
  z-index: calc(var(--layer-dropdown) - 1);
  background: transparent;
  display: none;
}

.dropdown--open .dropdown__backdrop {
  display: block;
}

/* Mobile adjustments
 * -------------------------------------------------------------------------- */

@media (max-width: 40em) {
  .dropdown__menu {
    position: fixed;
    left: 1rem;
    right: 1rem;
    max-width: none;
    width: auto;
  }

  .dropdown--dropup .dropdown__menu {
    bottom: calc(100% + 4px);
  }

  .dropdown--center .dropdown__menu {
    transform: translateY(-8px);
  }

  .dropdown--center.dropdown--open .dropdown__menu {
    transform: translateY(0);
  }
}