/* Single-choice, multiple-choice, and action menus share a shell, not selection semantics. */
.theme-dropdown {
  position: relative;
  flex: none;
}

.theme-dropdown > summary.theme-control {
  list-style: none;
  border: 1px solid var(--color-light-border);
  box-shadow: none;
}

.theme-dropdown > summary::-webkit-details-marker {
  display: none;
}

.theme-dropdown > summary.theme-control:hover {
  background: var(--color-hover);
}

.theme-dropdown[open] > summary.theme-control {
  background: var(--github-button-default-bgColor-active);
}

.theme-dropdown.theme-dropdown-quiet > summary.theme-control {
  border-color: transparent;
  background: transparent;
}

.theme-dropdown.theme-dropdown-quiet > summary.theme-control:hover,
.theme-dropdown.theme-dropdown-quiet[open] > summary.theme-control {
  background: var(--github-control-transparent-bgColor-hover);
}

.theme-dropdown-panel {
  position: absolute;
  z-index: 50;
  inset: calc(100% + 8px) 0 auto auto;
  width: 300px;
  max-width: calc(100vw - 32px);
  max-height: min(480px, 70vh);
  overflow-y: auto;
  border: 1px solid var(--color-light-border);
  border-radius: var(--border-radius);
  background: var(--color-menu);
  color: var(--color-text);
  /* The floating shadow includes an outline; using it here would draw a second border. */
  box-shadow: none;
  font-size: 12px;
  line-height: 18px;
}

.theme-dropdown-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 32px;
  padding: 4px 8px 4px 16px;
  border-bottom: 1px solid color-mix(in srgb, var(--color-light-border) 70%, transparent);
  font-weight: 600;
}

.theme-dropdown-close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  padding: 0;
  border: 0;
  border-radius: var(--border-radius);
  background: transparent;
  color: var(--color-text-light-1);
  cursor: pointer;
}

.theme-dropdown-close:hover {
  background: var(--github-control-transparent-bgColor-hover);
  color: var(--color-text);
}

.ui.form .theme-dropdown-panel > .theme-dropdown-option,
.theme-dropdown-panel > .theme-dropdown-action {
  display: flex;
  align-items: center;
  position: relative;
  gap: 8px;
  width: 100%;
  min-height: 33px;
  margin: 0;
  padding: 7px 16px;
  border: 0;
  border-bottom: 1px solid color-mix(in srgb, var(--color-light-border) 70%, transparent);
  border-radius: 0;
  background: var(--color-menu);
  color: var(--color-text);
  font: 400 12px/18px var(--fonts-proportional);
  text-align: left;
  text-decoration: none;
  cursor: pointer;
}

.ui.form .theme-dropdown-panel > .theme-dropdown-option:last-child,
.theme-dropdown-panel > .theme-dropdown-action:last-child {
  border-bottom: 0;
}

.ui.form .theme-dropdown-option:hover,
.ui.form .theme-dropdown-option:focus-within,
.theme-dropdown-panel > .theme-dropdown-action:not(:disabled):hover,
.theme-dropdown-panel > .theme-dropdown-action:focus-visible {
  background: var(--github-control-transparent-bgColor-hover);
  color: var(--color-text);
}

.theme-dropdown-action:disabled {
  color: var(--color-text-light-1);
  cursor: default;
}

.theme-dropdown-option .theme-dropdown-check {
  flex: none;
  visibility: hidden;
}

.theme-dropdown-option:has(input:checked) .theme-dropdown-check {
  visibility: visible;
}

.theme-dropdown-option input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
}

/* GitHub's classic select menus use the browser checkbox, independent of form input styles. */
.ui.form .theme-dropdown-panel input.theme-dropdown-checkbox {
  appearance: auto;
  display: inline-block;
  flex: none;
  width: 13px;
  min-width: 13px;
  height: 13px;
  margin: 0 3px 0 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  accent-color: auto;
}

.ui.form .theme-dropdown-panel input.theme-dropdown-checkbox::before,
.ui.form .theme-dropdown-panel input.theme-dropdown-checkbox::after {
  content: none;
}

.theme-dropdown[data-theme-dropdown="actions"] > .theme-dropdown-panel {
  width: 220px;
  padding: 8px;
  border: 0;
  border-radius: 12px;
  box-shadow: var(--github-shadow-floating-small);
}

.theme-dropdown[data-theme-dropdown="actions"] .theme-dropdown-action {
  min-height: 32px;
  padding: 6px 8px;
  border: 0;
  border-radius: var(--border-radius);
  font-size: 14px;
  line-height: 20px;
}