/**
 * File: assets/css/foundation/primitives.css
 * Purpose: Applies Engine components to the shared Theme DNA visual contract with safe standalone fallbacks.
 * Scope: Generic Engine frontend primitives only; feature layouts remain module-owned.
 * Related PHP: src/DesignSystem/DesignSystemService.php
 * Related CSS: assets/css/foundation/tokens.css
 * Package: HyperDAF Engine
 */

:where(.hdf-engine-surface, .hdf-engine-panel) {
  border: var(--hdf-engine-border-width-default) solid var(--hdf-engine-color-border);
  border-radius: var(--hdf-engine-card-radius);
  background: var(--hdf-engine-color-surface-raised);
  color: var(--hdf-engine-color-text);
  box-shadow: none;
}

:where(.hdf-button) {
  display: inline-flex;
  min-height: var(--hdf-engine-button-height-md);
  align-items: center;
  justify-content: center;
  gap: var(--hdf-engine-button-gap);
  padding-inline: var(--hdf-engine-control-padding-x);
  border: var(--hdf-engine-border-width-default) solid transparent;
  border-radius: var(--hdf-engine-button-radius);
  font: inherit;
  font-weight: var(--hdf-engine-font-weight-semibold);
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition:
    color var(--hdf-engine-motion-fast) var(--hdf-engine-motion-easing),
    background-color var(--hdf-engine-motion-fast) var(--hdf-engine-motion-easing),
    border-color var(--hdf-engine-motion-fast) var(--hdf-engine-motion-easing);
}

:where(.hdf-button--primary) {
  border-color: var(--hdf-engine-button-primary-bg);
  background: var(--hdf-engine-button-primary-bg);
  color: var(--hdf-engine-button-primary-fg);
}

:where(.hdf-button--primary:hover, .hdf-button--primary:focus-visible) {
  border-color: var(--hdf-engine-button-primary-hover);
  background: var(--hdf-engine-button-primary-hover);
  color: var(--hdf-engine-button-primary-fg);
}

:where(.hdf-button--secondary) {
  border-color: var(--hdf-engine-color-border);
  background: var(--hdf-engine-button-secondary-bg);
  color: var(--hdf-engine-button-secondary-fg);
}

:where(.hdf-button--secondary:hover, .hdf-button--secondary:focus-visible) {
  border-color: var(--hdf-engine-color-border-strong);
  background: var(--hdf-engine-color-surface-hover);
  color: var(--hdf-engine-color-text);
}

:where(.hdf-engine-field, .hdf-engine-select, .hdf-engine-textarea) {
  min-height: var(--hdf-engine-control-height-md);
  padding-inline: var(--hdf-engine-control-padding-x);
  border: var(--hdf-engine-border-width-default) solid var(--hdf-engine-color-border);
  border-radius: var(--hdf-engine-control-radius);
  background: var(--hdf-engine-color-surface);
  color: var(--hdf-engine-color-text);
  font: inherit;
}

:where(.hdf-engine-field, .hdf-engine-select, .hdf-engine-textarea):focus {
  border-color: var(--hdf-engine-color-focus);
  outline: 0;
  box-shadow: var(--hdf-engine-shadow-focus);
}

:where(.hdf-engine-badge) {
  display: inline-flex;
  min-height: var(--hdf-engine-badge-height);
  align-items: center;
  padding-inline: var(--hdf-engine-badge-padding-x);
  border: var(--hdf-engine-border-width-default) solid var(--hdf-engine-color-border-subtle);
  border-radius: var(--hdf-engine-badge-radius);
  background: var(--hdf-engine-color-surface-muted);
  color: var(--hdf-engine-color-text-secondary);
  font-size: var(--hdf-engine-badge-font-size);
  font-weight: var(--hdf-engine-badge-font-weight);
}

:where(.hdf-engine-table) {
  width: 100%;
  border-collapse: collapse;
  background: var(--hdf-engine-color-surface);
}

:where(.hdf-engine-table th, .hdf-engine-table td) {
  padding: var(--hdf-engine-space-3);
  border: var(--hdf-engine-border-width-default) solid var(--hdf-engine-color-border-subtle);
  text-align: start;
}

:where(.hdf-engine-table th) {
  background: var(--hdf-engine-color-surface-muted);
  color: var(--hdf-engine-color-text-secondary);
  font-weight: var(--hdf-engine-font-weight-semibold);
}

@media (prefers-reduced-motion: reduce) {
  :where(.hdf-button, .hdf-engine-field, .hdf-engine-select, .hdf-engine-textarea) {
    transition-duration: 1ms !important;
  }
}