/**
 * Reusable PCS & KEYS presentation components.
 *
 * This layer uses only tokens approved in AGENTS.md and tokens.css.
 * Exact typography sizes/line heights, semantic success/error/information
 * colors, modal/drawer dimensions, tooltip geometry, and responsive breakpoints
 * remain intentionally undefined pending approval. Feature implementations may
 * provide those values only after they are approved.
 */

/* Page, container, section, and layout shells */
.pk-container,
.pk-section,
.pk-section__inner,
.pk-layout,
.pk-layout-row,
.pk-layout-column,
.pk-stack,
.pk-cluster {
	box-sizing: border-box;
	min-width: 0;
}

.pk-container {
	width: 100%;
	margin-right: auto;
	margin-left: auto;
	padding-right: var(--pk-page-gutter-desktop);
	padding-left: var(--pk-page-gutter-desktop);
}

.pk-section {
	margin-block: 40px;
	background-color: var(--pk-color-canvas);
	color: var(--pk-color-text);
	font-family: var(--pk-font-family-ui);
}

.pk-application-intro {
	display: grid;
	gap: var(--pk-space-8);
	margin-bottom: var(--pk-space-16);
}

.pk-application-intro__title,
.pk-application-intro__description,
.pk-major-container__title {
	margin: 0;
	font-family: var(--pk-font-family-ui);
}

.pk-application-intro__title {
	color: var(--pk-color-action);
	font-size: 20px;
	font-weight: 600;
	line-height: 28px;
}

.pk-application-intro__description {
	color: var(--pk-color-text);
	font-size: 16px;
	font-weight: 500;
	line-height: 24px;
}

.pk-major-container__title {
	color: var(--pk-color-action);
	font-size: 16px;
	font-weight: 600;
	line-height: 20px;
}

.pk-major-container__divider {
	height: 1px;
	margin: var(--pk-space-8) calc(-1 * var(--pk-padding-primary-container)) 0;
	background: var(--pk-color-border);
}

.pk-progress {
	border-radius: 3px;
	overflow: hidden;
}

.pk-progress__fill {
	border-radius: 3px;
}

.pk-application-navigation {
	position: relative;
	display: flex;
	min-width: 0;
	margin: 0;
	padding: 0;
	overflow-x: auto;
	overflow-y: hidden;
	border: 0;
	border-bottom: var(--pk-border-standard);
	border-radius: 0;
	background: transparent;
	scrollbar-width: none;
	-webkit-overflow-scrolling: touch;
}

.pk-application-navigation::-webkit-scrollbar {
	display: none;
}

.pk-application-navigation__indicator {
	position: absolute;
	z-index: 2;
	top: 0;
	right: auto;
	bottom: auto;
	left: 0;
	height: 2px;
	background: var(--pk-color-action);
	pointer-events: none;
}

.pk-application-navigation[data-pk-application-navigation-ready="true"] .pk-application-navigation__indicator {
	transition: transform 180ms cubic-bezier(0.4, 0, 0.2, 1), width 180ms cubic-bezier(0.4, 0, 0.2, 1);
}

.pk-application-navigation__item {
	position: relative;
	z-index: 1;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	box-sizing: border-box;
	min-width: 0;
	min-height: var(--pk-button-height);
	margin: 0;
	padding: 0 var(--pk-space-8);
	border: 0;
	border-radius: 0;
	background: transparent;
	color: var(--pk-color-text);
	font-family: var(--pk-font-family-ui);
	font-size: 14px;
	font-weight: 600;
	line-height: var(--pk-line-height-control);
	white-space: nowrap;
	box-shadow: none;
	cursor: pointer;
	text-decoration: none;
	transition: color 180ms cubic-bezier(0.4, 0, 0.2, 1);
}

.pk-application-navigation .pk-application-navigation__item:hover,
.pk-application-navigation .pk-application-navigation__item:focus-visible,
.pk-application-navigation .pk-application-navigation__item.is-previewed {
	background: transparent;
	color: var(--pk-color-action);
	outline: 0;
}

.pk-card {
	background-color: var(--pk-color-surface);
	box-shadow: var(--pk-shadow-primary-container);
}

.pk-layout-row,
.pk-cluster {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: var(--pk-space-10);
}

.pk-layout-column,
.pk-stack {
	display: flex;
	flex-direction: column;
	gap: var(--pk-space-16);
}

.pk-layout--start {
	justify-content: flex-start;
}

.pk-layout--between {
	justify-content: space-between;
}

.pk-layout--end {
	justify-content: flex-end;
}

.pk-layout--stretch {
	align-items: stretch;
}

/* Typography hierarchy. Sizes and line heights are deliberately not set. */
.pk-heading,
.pk-body,
.pk-meta,
.pk-label,
.pk-button,
.pk-control,
.pk-badge,
.pk-status {
	font-family: var(--pk-font-family-ui);
}

.pk-heading {
	margin: 0;
	color: var(--pk-color-text);
}

.pk-heading--page {
	font-weight: 700;
}

.pk-heading--section,
.pk-heading--card {
	font-weight: 600;
}

.pk-body {
	margin: 0;
	color: var(--pk-color-text);
	font-weight: 400;
}

.pk-meta {
	margin: 0;
	color: var(--pk-color-text-muted);
	font-weight: 500;
}

/* Surface, card, divider, badge, and status shells */
.pk-surface--interactive {
	cursor: pointer;
}

.pk-surface--selected,
.pk-card--selected {
	border-color: var(--pk-color-action);
}

.pk-content-card {
	min-width: 0;
}

.pk-content-card__meta {
	justify-content: space-between;
}

.pk-content-card__link {
	box-sizing: border-box;
	height: 100%;
	padding: var(--pk-space-16);
	border: var(--pk-border-standard);
	border-radius: var(--pk-radius-surface);
	background-color: var(--pk-color-surface);
	color: var(--pk-color-text);
	text-decoration: none;
	overflow-wrap: anywhere;
	box-shadow:
		0 10px 30px rgba(0, 0, 0, 0.30),
		0 4px 10px rgba(0, 0, 0, 0.22);
	transition:
		border-color var(--pk-motion-duration) ease,
		box-shadow var(--pk-motion-duration) ease,
		transform var(--pk-motion-duration) ease,
		color var(--pk-motion-duration) ease;
}

.pk-content-card__link:hover,
.pk-content-card__link:focus,
.pk-content-card__link:active,
.pk-content-card__link:focus-visible {
	border-color: var(--pk-color-action);
	box-shadow:
		0 16px 38px rgba(0, 0, 0, 0.38),
		0 6px 14px rgba(0, 0, 0, 0.26);
	transform: translateY(-1px);
}

.pk-content-card__link:focus,
.pk-content-card__link:active,
.pk-content-card__link:focus-visible {
	outline: 0;
}

.pk-content-card__title {
	color: var(--pk-color-action);
	transition: color var(--pk-motion-duration) ease;
}

.pk-content-card__link:hover .pk-content-card__title,
.pk-content-card__link:focus .pk-content-card__title,
.pk-content-card__link:active .pk-content-card__title,
.pk-content-card__link:focus-visible .pk-content-card__title {
	color: var(--pk-color-action-hover);
}

.pk-content-card__excerpt {
	overflow-wrap: anywhere;
}

.pk-pagination {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: center;
	gap: var(--pk-space-10);
	box-sizing: border-box;
	min-width: 0;
	font-family: var(--pk-font-family-ui);
}

.pk-pagination__control,
.pk-pagination__context {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	box-sizing: border-box;
	min-height: var(--pk-button-height);
	padding: 0 var(--pk-space-12);
	border: var(--pk-border-standard);
	border-radius: var(--pk-radius-button);
	background-color: var(--pk-color-surface);
	color: var(--pk-color-text);
	font-family: var(--pk-font-family-ui);
	font-weight: 600;
	line-height: 20px;
	text-align: center;
}

a.pk-pagination__control {
	color: var(--pk-color-action);
	text-decoration: none;
	transition:
		border-color var(--pk-motion-duration) ease,
		color var(--pk-motion-duration) ease;
}

a.pk-pagination__control:hover,
a.pk-pagination__control:focus,
a.pk-pagination__control:active,
a.pk-pagination__control:focus-visible {
	border-color: var(--pk-color-action);
	color: var(--pk-color-action-hover);
	outline: 0;
}

.pk-pagination__control--unavailable {
	color: var(--pk-color-border);
	cursor: default;
}

.pk-divider {
	width: 100%;
	margin: 0;
	border: 0;
	border-top: var(--pk-border-standard);
}

.pk-badge,
.pk-status {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	box-sizing: border-box;
	min-height: var(--pk-button-height);
	padding: 0 var(--pk-space-8);
	border: var(--pk-border-standard);
	border-radius: var(--pk-radius-surface);
	background-color: var(--pk-color-surface);
	color: var(--pk-color-text);
	font-weight: 600;
}

.pk-badge--selected,
.pk-status--selected {
	border-color: var(--pk-color-action);
	background-color: var(--pk-color-action);
	color: var(--pk-color-canvas);
}

/* Standard action buttons */
.pk-button--full-width {
	width: 100%;
}

.pk-button:active:not(:disabled):not([aria-disabled="true"]),
.pk-button[aria-pressed="true"] {
	background-color: var(--pk-color-action-hover);
	color: var(--pk-color-canvas);
}

.pk-paired-actions {
	display: grid;
	gap: var(--pk-space-4);
}

.pk-paired-actions > .pk-button {
	width: 100%;
	border-radius: var(--pk-radius-button);
}

.pk-paired-actions > .pk-button:first-child {
	border-radius: var(--pk-radius-button) var(--pk-radius-button) 0 0;
}

.pk-paired-actions > .pk-button:last-child {
	border-radius: 0 0 var(--pk-radius-button) var(--pk-radius-button);
}

.pk-paired-actions--horizontal {
	grid-template-columns: repeat(2, minmax(0, 1fr));
}

.pk-paired-actions--horizontal > .pk-button:first-child {
	border-radius: var(--pk-radius-button) 0 0 var(--pk-radius-button);
}

.pk-paired-actions--horizontal > .pk-button:last-child {
	border-radius: 0 var(--pk-radius-button) var(--pk-radius-button) 0;
}

/* Interactive action icons and static information icons */
.pk-icon-button {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	box-sizing: border-box;
	width: var(--pk-button-height);
	min-width: var(--pk-button-height);
	height: var(--pk-button-height);
	padding: 0;
	border: 0;
	border-radius: var(--pk-radius-button);
	background-color: transparent;
	color: var(--pk-color-action);
	cursor: pointer;
}

.pk-icon-button:hover:not(:disabled):not([aria-disabled="true"]),
.pk-icon-button:active:not(:disabled):not([aria-disabled="true"]),
.pk-icon-button[aria-pressed="true"] {
	color: var(--pk-color-action-hover);
}

.pk-icon-button:disabled,
.pk-icon-button[aria-disabled="true"] {
	color: var(--pk-color-border);
	cursor: default;
}

.pk-icon--action {
	fill: none;
	stroke: currentColor;
}

.pk-icon-button:hover:not(:disabled):not([aria-disabled="true"]) .pk-icon--action,
.pk-icon-button:active:not(:disabled):not([aria-disabled="true"]) .pk-icon--action,
.pk-icon-button[aria-pressed="true"] .pk-icon--action {
	fill: currentColor;
}

.pk-icon--information {
	fill: currentColor;
	stroke: none;
}

/* Labels and form controls */
.pk-field {
	display: flex;
	flex-direction: column;
	gap: var(--pk-space-8);
	min-width: 0;
}

.pk-label {
	color: var(--pk-color-text);
	font-weight: 600;
}

.pk-control {
	box-sizing: border-box;
	width: 100%;
	min-width: 0;
	min-height: var(--pk-button-height);
	padding: 0 var(--pk-space-12);
	border: var(--pk-border-standard);
	border-radius: var(--pk-radius-input);
	background-color: var(--pk-color-canvas);
	color: var(--pk-color-text);
	font-family: var(--pk-font-family-ui);
	font-size: var(--pk-font-size-control);
	font-weight: var(--pk-font-weight-control);
	line-height: var(--pk-line-height-control);
	caret-color: var(--pk-color-action);
	outline: 0;
	box-shadow: none;
}

.pk-control::placeholder {
	color: var(--pk-color-text);
	font-family: var(--pk-font-family-ui);
	font-size: var(--pk-font-size-control);
	font-weight: var(--pk-font-weight-control);
	line-height: var(--pk-line-height-control);
	opacity: 1;
}

.pk-textarea {
	padding-top: var(--pk-space-8);
	padding-bottom: var(--pk-space-8);
}

.pk-control:disabled,
.pk-control[aria-disabled="true"] {
	border-color: var(--pk-color-border);
	background-color: var(--pk-color-canvas);
	color: var(--pk-color-border);
	cursor: default;
}

.pk-control:focus,
.pk-control:focus-visible {
	border-color: var(--pk-color-border);
	outline: 0;
	box-shadow: none;
}

.pk-control[aria-invalid="true"] {
	border-color: var(--pk-color-border);
}

.pk-control[aria-invalid="true"]:focus,
.pk-control[aria-invalid="true"]:focus-visible {
	border-color: var(--pk-color-border);
}

.pk-field-feedback[role="alert"]:not([hidden]) {
	color: var(--pk-color-error);
}

.pk-input-action__input:focus-visible {
	outline: 0;
}

.pk-control--error::placeholder {
	color: var(--pk-color-error);
}

/* Empty, loading, and feedback shells without unapproved semantic colors */
.pk-empty-state,
.pk-loading-state,
.pk-feedback {
	display: flex;
	flex-direction: column;
	gap: var(--pk-space-12);
	box-sizing: border-box;
	border: var(--pk-border-standard);
	border-radius: var(--pk-radius-surface);
	background-color: var(--pk-color-surface);
	color: var(--pk-color-text);
	font-family: var(--pk-font-family-ui);
}

.pk-empty-state__actions,
.pk-feedback__actions {
	display: flex;
	flex-wrap: wrap;
	gap: var(--pk-space-10);
}

.pk-loading-indicator {
	display: inline-flex;
	color: var(--pk-color-action);
}

.pk-feedback[data-state="success"],
.pk-feedback[data-state="error"],
.pk-feedback[data-state="information"] {
	border-color: var(--pk-color-border);
}

/* Dialog, drawer, dropdown/menu, and tooltip shells. Positioning is feature-owned. */
.pk-dialog,
.pk-drawer,
.pk-menu,
.pk-tooltip {
	box-sizing: border-box;
	border: var(--pk-border-standard);
	border-radius: var(--pk-radius-surface);
	background-color: var(--pk-color-surface);
	color: var(--pk-color-text);
	font-family: var(--pk-font-family-ui);
}

.pk-dialog[hidden],
.pk-drawer[hidden],
.pk-menu[hidden],
.pk-tooltip[hidden] {
	display: none;
}

.pk-dialog__header,
.pk-dialog__body,
.pk-dialog__footer,
.pk-drawer__header,
.pk-drawer__body,
.pk-drawer__footer,
.pk-menu__group {
	box-sizing: border-box;
}

.pk-menu__item {
	display: flex;
	align-items: center;
	box-sizing: border-box;
	width: 100%;
	min-height: var(--pk-button-height);
	padding: var(--pk-space-8) var(--pk-space-10);
	border: 0;
	border-radius: var(--pk-radius-surface);
	background-color: transparent;
	color: var(--pk-color-text);
	font: inherit;
	text-align: left;
	text-decoration: none;
	cursor: pointer;
}

.pk-menu__item:hover,
.pk-menu__item:active,
.pk-menu__item[aria-current="true"],
.pk-menu__item[aria-selected="true"] {
	background-color: var(--pk-color-action);
	color: var(--pk-color-canvas);
}

.pk-menu__item:disabled,
.pk-menu__item[aria-disabled="true"] {
	background-color: transparent;
	color: var(--pk-color-border);
	cursor: default;
}

.pk-tooltip-trigger {
	border: 0;
	background-color: transparent;
	color: inherit;
	font: inherit;
}

/* Reduced motion applies without introducing a permanent motion system. */
@media (prefers-reduced-motion: reduce) {
	.pk-button,
	.pk-icon-button,
	.pk-control,
	.pk-surface--interactive,
	.pk-content-card,
	.pk-content-card__link,
	.pk-content-card__title,
	a.pk-pagination__control,
	.pk-menu__item,
	.pk-tooltip-trigger {
		transition-duration: 0s;
		animation-duration: 0s;
	}

	.pk-content-card__link:hover,
	.pk-content-card__link:focus,
	.pk-content-card__link:active,
	.pk-content-card__link:focus-visible {
		transform: none;
	}
}