/* Themed custom select styles for the Carbon Calculator page */
.calculator-page .custom-select {
  position: relative;
  display: inline-block;
  width: 100%;
}

.calculator-page .custom-select-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 0.375rem 0.75rem; /* match .form-select-sm */
  font-size: 0.875rem;
  line-height: 1.4;
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: border-color 120ms ease, box-shadow 120ms ease;
}

.calculator-page .custom-select-trigger:focus,
.calculator-page .custom-select-trigger:hover {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
  outline: none;
}

.calculator-page .custom-select-trigger.is-invalid {
  border-color: var(--bs-danger, #dc3545);
  box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.15);
}

.calculator-page .custom-select-trigger .caret {
  margin-left: auto;
  display: inline-block;
  border-top: 5px solid currentColor;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  height: 0;
  width: 0;
}

.calculator-page .custom-select.open .custom-select-trigger .caret {
  transform: rotate(180deg);
}

.calculator-page .custom-select-menu {
  position: absolute;
  z-index: 1050; /* above other form elements */
  top: calc(100% + 4px);
  left: 0;
  min-width: 100%;
  max-height: 240px;
  overflow: auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  box-shadow: var(--shadow-md);
  padding: 4px;
  display: none;
}

.calculator-page .custom-select.open .custom-select-menu {
  display: block;
}

.calculator-page .custom-select-option {
  padding: 0.375rem 0.5rem;
  border-radius: 6px;
  font-size: 0.875rem;
  color: var(--color-text);
  cursor: pointer;
}

.calculator-page .custom-select-option[aria-selected="true"] {
  background: var(--color-primary-ghost, rgba(16, 185, 129, 0.12));
  color: var(--color-text);
}

.calculator-page .custom-select-option:hover,
.calculator-page .custom-select-option:focus {
  background: var(--color-surface-alt);
}

/* Visually hide the native select while keeping it in the flow for forms and a11y */
.calculator-page .native-select-visually-hidden {
  position: absolute !important;
  opacity: 0 !important;
  pointer-events: none !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0 0 0 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* Dark mode support if project defines prefers-color-scheme or variables already adapt */
@media (prefers-color-scheme: dark) {
  .calculator-page .custom-select-menu {
    box-shadow: var(--shadow-sm);
  }
}