/* The desktop app's frame (docs/ui.md, "The window model"): the root host fills the window; under 720 CSS px wide the
 * ActionBar sits at the foot as on the phones, from 720 it is the left rail with the same glyphs, caps labels and gold
 * chosen tab (a media query reads no custom property: 720 is --qp-wide-rail-from). The content is one centred column
 * of at most --qp-wide-column, extra width page ground; each page scrolls on its own, so a stack keeps its place. The
 * layout holds down to 192 CSS px wide (a 480-px window at the largest size: the page's 125 % times 200 %). A pump's
 * cover takes the whole window. */

html, body {
	height: 100%;
}

body {
	overflow: hidden;
}

qp-root-host {
	display: grid;
	grid-template-columns: minmax(0, 1fr);
	grid-template-rows: minmax(0, 1fr) auto;
	grid-template-areas: "stage" "bar";
	height: 100%;
}

.qp-stage {
	grid-area: stage;
	position: relative;
	min-height: 0;
	overflow: hidden;
}

.qp-stack {
	position: absolute;
	inset: 0;
}

.qp-stack > *, .qp-cover > * {
	position: absolute;
	inset: 0;
	overflow-y: auto;
	overscroll-behavior: contain;
}

.qp-cover {
	position: fixed;
	inset: 0;
	z-index: 3;
	background: var(--qp-color-page);
}

.qp-column {
	display: flex;
	flex-direction: column;
	gap: var(--qp-layout-space12);
	width: 100%;
	max-width: var(--qp-wide-column);
	margin-inline: auto;
	padding: var(--qp-layout-space8) var(--qp-layout-margin) var(--qp-layout-space32);
}

qp-page > qp-top-bar, qp-page > qp-detail-bar {
	max-width: var(--qp-wide-column);
	margin-inline: auto;
}

/* The ActionBar at the foot ---------------------------------------------------------------------------------------- */

qp-action-bar {
	grid-area: bar;
	position: relative;
	display: block;
	background: var(--qp-surface-action-bar-fill);
}

/* its top edge: lineStrong with the gold shine fading out to both sides */
qp-action-bar::before {
	content: "";
	position: absolute;
	inset: 0 0 auto;
	height: var(--qp-layout-hairline);
	background: var(--qp-surface-action-bar-shine), var(--qp-surface-action-bar-edge);
}

qp-action-bar nav {
	display: flex;
	min-height: var(--qp-layout-action-bar);
	padding: 0 var(--qp-layout-space12);
}

.qp-tab {
	position: relative;
	display: flex;
	flex: 1;
	flex-direction: column;
	align-items: center;
	gap: var(--qp-surface-action-bar-gap);
	min-width: 0;
	padding: var(--qp-layout-space14) var(--qp-layout-space2) var(--qp-layout-space8);
	color: var(--qp-surface-action-bar-idle);
	transition: color var(--qp-motion-glow);
}

.qp-tab qp-art {
	width: var(--qp-surface-action-bar-glyph);
	height: var(--qp-surface-action-bar-glyph);
}

.qp-tab-label {
	max-width: 100%;
	font: var(--qp-type-tab-font);
	letter-spacing: var(--qp-type-tab-tracking);
	text-transform: var(--qp-type-tab-case);
	overflow: hidden;
	text-overflow: ellipsis;
	white-space: nowrap;
}

.qp-tab:hover {
	color: var(--qp-color-text2);
}

.qp-tab:active {
	opacity: 0.6;
}

.qp-tab.qp-chosen {
	color: var(--qp-surface-action-bar-selected);
}

/* the chosen tab's marker on the bar's edge above its glyph */
.qp-tab::before {
	content: "";
	position: absolute;
	top: calc(var(--qp-layout-hairline) * -1);
	left: 50%;
	width: var(--qp-surface-action-bar-marker-width);
	height: var(--qp-surface-action-bar-marker-height);
	border-radius: var(--qp-surface-action-bar-marker-height);
	background: var(--qp-surface-action-bar-selected);
	box-shadow: var(--qp-surface-action-bar-marker-glow);
	opacity: 0;
	transform: translateX(-50%);
	transition: opacity var(--qp-motion-glow);
}

.qp-tab.qp-chosen::before {
	opacity: 1;
}

.qp-tab:focus-visible {
	outline-offset: calc(var(--qp-wide-focus-ring-width) * -1);
}

.qp-tab-dot {
	position: absolute;
	top: calc(var(--qp-layout-space14) - var(--qp-layout-space2));
	left: calc(50% + var(--qp-surface-action-bar-glyph) / 2 - var(--qp-layout-space4));
	width: var(--qp-surface-chip-dot);
	height: var(--qp-surface-chip-dot);
	border-radius: 50%;
	background: var(--qp-surface-action-bar-selected);
	box-shadow: 0 0 calc(var(--qp-surface-chip-dot-glow-radius) / 2) var(--qp-surface-action-bar-selected);
}

/* The rail, from 720 CSS px wide ----------------------------------------------------------------------------------- */

@media (min-width: 720px) {
	qp-root-host {
		grid-template-columns: var(--qp-wide-rail) minmax(0, 1fr);
		grid-template-rows: minmax(0, 1fr);
		grid-template-areas: "bar stage";
	}

	qp-action-bar {
		background: linear-gradient(to right, var(--qp-surface-action-bar-fill-stops));
	}

	/* the edge runs down the rail's trailing side */
	qp-action-bar::before {
		inset: 0 0 0 auto;
		width: var(--qp-layout-hairline);
		height: auto;
		background: linear-gradient(to bottom, var(--qp-surface-action-bar-shine-stops)), var(--qp-surface-action-bar-edge);
	}

	/* the five tabs scroll in the rail where the window is lower than they are tall (a short window, a zoomed page) */
	qp-action-bar nav {
		flex-direction: column;
		height: 100%;
		padding: var(--qp-layout-space12) 0;
		overflow-y: auto;
		overscroll-behavior: contain;
	}

	.qp-tab {
		flex: none;
		padding: var(--qp-layout-space12) var(--qp-layout-space4);
	}

	/* the marker beside the chosen glyph, on the rail's leading edge */
	.qp-tab::before {
		top: 50%;
		left: 0;
		width: var(--qp-surface-action-bar-marker-height);
		height: var(--qp-surface-action-bar-marker-width);
		transform: translateY(-50%);
	}

	.qp-tab-dot {
		top: calc(var(--qp-layout-space12) - var(--qp-layout-space2));
	}
}

/* a forced palette paints over the backgrounds these two marks are: the chosen tab's marker and the owed step's dot */
@media (forced-colors: active) {
	.qp-tab::before, .qp-tab-dot {
		background: Highlight;
	}
}

/* Pages' pieces ---------------------------------------------------------------------------------------------------- */

.qp-words-block {
	overflow-wrap: anywhere;
	-webkit-user-select: text;
	user-select: text;
}

qp-card.qp-step, qp-card.qp-pair, .qp-stack-small {
	display: flex;
	flex-direction: column;
	gap: var(--qp-layout-space12);
}

qp-card.qp-pair {
	align-items: stretch;
}

.qp-next {
	color: var(--qp-color-text);
}

.qp-count {
	text-align: end;
}

qp-card.qp-details {
	display: grid;
	grid-template-columns: max-content minmax(0, 1fr);
	gap: var(--qp-layout-space6) var(--qp-layout-space12);
	align-items: baseline;
}

qp-card.qp-details code {
	font: 400 var(--qp-type-meta-size) / var(--qp-type-meta-line-height) ui-monospace, "Cascadia Mono", Consolas,
		monospace;
	overflow-wrap: anywhere;
}

/* The match-over card's window: no frame, the page ground to its edges */
.qp-card-window {
	overflow: hidden;
}