/**
 * 下拉单选组件样式。须在 tool-page.css 之后引入，
 * 以覆盖 body.tool-page 对普通 button 的全局描边/圆角/阴影。
 */

.dropdown-single__trigger {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.dropdown-single__label {
  flex: 0 1 auto;
}

.dropdown-single__chevron {
  flex: 0 0 auto;
  --icon-size: 14px;
  color: var(--text-muted);
  transition: transform var(--ft-transition);
}

.dropdown-single__trigger[aria-expanded="true"] .dropdown-single__chevron {
  transform: rotate(180deg);
}

.dropdown-single__panel {
  position: fixed;
  z-index: 40;
  display: grid;
  gap: 0;
  min-width: 132px;
  padding: 4px 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--tool-button-radius);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.dropdown-single__panel[hidden] {
  display: none;
}

body.tool-page .dropdown-single__panel button:not(.icon-btn) {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  margin: 0;
  padding: var(--tool-button-padding-block) var(--tool-button-padding-inline);
  color: var(--text);
  font-size: var(--tool-button-font-size);
  line-height: var(--tool-button-line-height);
  text-align: left;
  white-space: nowrap;
  background: transparent;
  border: 0;
  border-radius: 0;
  box-shadow: none;
  transition: background var(--ft-transition);
}

body.tool-page .dropdown-single__panel button:not(.icon-btn):not(:disabled):hover,
body.tool-page .dropdown-single__panel button:not(.icon-btn):focus-visible {
  outline: 0;
  background: var(--surface-hover);
  border-color: transparent;
}

.dropdown-single__option-label {
  flex: 1;
}

.dropdown-single__check {
  flex: 0 0 auto;
  --icon-size: 14px;
  color: var(--accent);
  opacity: 0;
}

.dropdown-single__option[aria-checked="true"] .dropdown-single__check {
  opacity: 1;
}