/* components/tab/tab.css
 *
 * Server-rendered tabs. Three desktop style variants
 * (horizontal-underline, vertical-rail, pill-buttons) plus a shared
 * accordion-on-mobile behavior driven by [data-mvc-tab][data-mode="accordion"]
 * (set by tab.js below the breakpoint).
 *
 * Variant scoping rule (see project memory): every variant-specific selector
 * carries its .mvc-tab--style-* ancestor so layouts never leak into each other.
 */

.mvc-tab__header {
	text-align: center;
	margin-block-end: var(--space-16);
}

/* ── Shell (the card box) ───────────────────────────────────────────────── */
.mvc-tab__shell {
	display: block;
	border: 1px solid var(--color-border);
	border-radius: var(--radius-lg);
	background-color: var(--color-surface);
	box-shadow: var(--shadow-md);
	overflow: hidden;
}

/* ── Tablist (desktop) — header bar inside the card ─────────────────────── */
.mvc-tab__tablist {
	display: flex;
	flex-wrap: wrap;
	gap: var(--space-1);
	padding: var(--space-2) var(--space-2) 0;
	background-color: var(--color-surface-raised);
	border-block-end: 1px solid var(--color-divider);
}

.mvc-tab__tab {
	display: inline-flex;
	align-items: center;
	gap: var(--space-2);
	padding: var(--space-4) var(--space-6);
	background: none;
	border: none;
	border-radius: var(--radius-md) var(--radius-md) 0 0;
	font-family: inherit;
	font-size: var(--text-base);
	font-weight: var(--font-semibold);
	color: var(--color-text-muted);
	cursor: pointer;
	white-space: nowrap;
	transition: color var(--transition-fast), background-color var(--transition-fast);
}

.mvc-tab__tab:hover {
	color: var(--color-heading);
	background-color: rgba(0, 0, 0, 0.03);
}

.mvc-tab__tab:focus-visible {
	outline: 3px solid var(--color-focus);
	outline-offset: -3px;
}

.mvc-tab__tab[aria-selected="true"] {
	color: var(--color-primary);
	background-color: var(--color-surface);
	/* Drop 1px to cover the tablist's bottom border so the active tab reads as
	   connected to the panel below it. */
	margin-block-end: -1px;
	padding-block-end: calc(var(--space-4) + 1px);
}

.mvc-tab__tab-icon {
	display: inline-flex;
	flex-shrink: 0;
}

/* The chevron marker is only meaningful in accordion (mobile) mode. */
.mvc-tab__tab-marker {
	display: none;
	flex-shrink: 0;
	margin-inline-start: auto;
	color: var(--color-primary);
	transition: transform var(--transition-base);
}

/* ── Panels ─────────────────────────────────────────────────────────────── */
.mvc-tab__panels {
	padding: var(--space-10);
}

.mvc-tab__panel[hidden] {
	display: none;
}

.mvc-tab__panel:focus-visible {
	outline: 3px solid var(--color-focus);
	outline-offset: 4px;
}

.mvc-tab__panel-title {
	margin-block: 0 var(--space-4);
}

/* ── Panel layout: two-column with image ────────────────────────────────── */
.mvc-tab__panel--two-col-image {
	display: grid;
	grid-template-columns: 1fr;
	gap: var(--space-10);
	align-items: center;
}

@media (min-width: 768px) {
	.mvc-tab__panel--two-col-image {
		grid-template-columns: 1fr 1fr;
	}
	/* Image on the left: place the media column first. Text column always
	   carries source order first (better for SEO/AEO reading order), so we
	   only re-order visually. */
	.mvc-tab__panel--two-col-image.mvc-tab__panel--img-left .mvc-tab__panel-media {
		order: -1;
	}
}

.mvc-tab__panel-media {
	margin: 0;
}

.mvc-tab__panel-img {
	display: block;
	width: 100%;
	height: auto;
	border-radius: var(--radius-md);
	object-fit: cover;
}

/* Body text in two-col mode shouldn't stretch its measure too wide. */
.mvc-tab__panel--two-col-image .mvc-tab__panel-text {
	min-width: 0;
}

.mvc-tab__quick-answer {
	margin-block-end: var(--space-6);
	padding: var(--space-4) var(--space-6);
	border-inline-start: 3px solid var(--color-primary);
	background-color: var(--color-surface-raised);
	border-radius: var(--radius-sm);
	font-size: var(--text-lg);
	line-height: var(--leading-relaxed);
	color: var(--color-text);
}

.mvc-tab__panel-body {
	font-size: var(--text-base);
	line-height: var(--leading-relaxed);
	color: var(--color-text);
}

/* ── Variant: Horizontal Underline (default) ────────────────────────────── *
 * Active tab lifts onto the panel surface (set in base) and gets a primary
 * top-accent bar so the selected state reads at a glance.
 */
.mvc-tab--style-horizontal-underline .mvc-tab__tab {
	position: relative;
	box-shadow: inset 0 3px 0 0 transparent;
}

.mvc-tab--style-horizontal-underline .mvc-tab__tab[aria-selected="true"] {
	box-shadow: inset 0 3px 0 0 var(--color-primary);
}

/* ── Variant: Pill Buttons ──────────────────────────────────────────────── *
 * Pills float above a plain card — opt the tablist out of the header-bar look.
 */
.mvc-tab--style-pill-buttons .mvc-tab__tablist {
	justify-content: center;
	gap: var(--space-3);
	padding: var(--space-5);
	background-color: transparent;
	border-block-end: 1px solid var(--color-divider);
}

.mvc-tab--style-pill-buttons .mvc-tab__tab {
	border-radius: 999px;
	border: 1px solid var(--color-border);
	background-color: var(--color-surface);
}

.mvc-tab--style-pill-buttons .mvc-tab__tab:hover {
	background-color: var(--color-surface-raised);
}

.mvc-tab--style-pill-buttons .mvc-tab__tab[aria-selected="true"] {
	background-color: var(--color-primary);
	border-color: var(--color-primary);
	color: #ffffff;
	/* Pills don't fold into the panel — drop the connected-tab seam fix. */
	margin-block-end: 0;
	padding-block-end: var(--space-4);
}

/* ── Variant: Vertical Rail (desktop only; collapses on mobile) ─────────── *
 * Rail of tabs on the left, panel on the right — both inside the card.
 */
@media (min-width: 768px) {
	.mvc-tab--style-vertical-rail .mvc-tab__shell {
		display: grid;
		grid-template-columns: minmax(200px, 260px) 1fr;
		align-items: stretch;
	}
	.mvc-tab--style-vertical-rail .mvc-tab__tablist {
		flex-direction: column;
		flex-wrap: nowrap;
		gap: var(--space-1);
		padding: var(--space-4);
		border-block-end: none;
		border-inline-end: 1px solid var(--color-divider);
	}
	.mvc-tab--style-vertical-rail .mvc-tab__tab {
		justify-content: flex-start;
		width: 100%;
		border-radius: var(--radius-md);
		box-shadow: inset 3px 0 0 0 transparent;
		white-space: normal;
		text-align: start;
	}
	.mvc-tab--style-vertical-rail .mvc-tab__tab[aria-selected="true"] {
		background-color: var(--color-surface);
		box-shadow: inset 3px 0 0 0 var(--color-primary);
		/* Reset the horizontal seam-fix; the rail connects on the inline edge. */
		margin-block-end: 0;
		margin-inline-end: -1px;
		padding-block-end: var(--space-4);
	}
}

/* ── Accordion-on-mobile (shared across all variants) ───────────────────── *
 * tab.js sets [data-mode="accordion"] on the shell below the breakpoint and
 * moves each tab button to sit directly before its own panel. In this mode
 * every panel is independently collapsible and the chevron marker appears.
 */
[data-mvc-tab][data-mode="accordion"] .mvc-tab__tablist {
	display: none;
}

[data-mvc-tab][data-mode="accordion"] .mvc-tab__tab {
	display: flex;
	width: 100%;
	max-width: 100%;
	box-sizing: border-box;
	justify-content: flex-start;
	align-items: center;
	gap: var(--space-3);
	padding: var(--space-4) var(--space-5);
	border: 1px solid var(--color-border);
	border-radius: var(--radius-md);
	margin-block-start: var(--space-2);
	background-color: var(--color-surface);
	color: var(--color-heading);
	/* Long tab labels must wrap inside the accordion header, not overflow the card. */
	white-space: normal;
	text-align: start;
	overflow-wrap: anywhere;
	min-width: 0;
}

[data-mvc-tab][data-mode="accordion"] .mvc-tab__tab-label {
	flex: 1 1 auto;
	min-width: 0;
}

[data-mvc-tab][data-mode="accordion"] .mvc-tab__tab-marker {
	display: inline-flex;
}

[data-mvc-tab][data-mode="accordion"] .mvc-tab__tab[aria-expanded="true"] .mvc-tab__tab-marker {
	transform: rotate(180deg);
}

[data-mvc-tab][data-mode="accordion"] .mvc-tab__tab[aria-expanded="true"] {
	border-end-start-radius: 0;
	border-end-end-radius: 0;
}

[data-mvc-tab][data-mode="accordion"] .mvc-tab__panel {
	border: 1px solid var(--color-border);
	border-block-start: none;
	border-end-start-radius: var(--radius-md);
	border-end-end-radius: var(--radius-md);
	padding: var(--space-6) var(--space-5);
}

[data-mvc-tab][data-mode="accordion"] .mvc-tab__panel-title {
	/* Label already shows in the accordion header button — avoid repeating it. */
	position: absolute;
	width: 1px;
	height: 1px;
	padding: 0;
	margin: -1px;
	overflow: hidden;
	clip: rect(0, 0, 0, 0);
	white-space: nowrap;
	border: 0;
}

/* ── Contrast inside dark bg-presets ────────────────────────────────────── *
 * bg-presets.css forces light text on dark presets. The card surface stays
 * white by default, so switch the whole shell to a translucent dark surface
 * and re-assert readable text on tabs (esp. the ACTIVE tab, which otherwise
 * lifts onto a white surface and renders white-on-white).
 */
[data-bg-preset="gradient-brand"]   .mvc-tab__shell,
[data-bg-preset="gradient-accent"]  .mvc-tab__shell,
[data-bg-preset="gradient-sunrise"] .mvc-tab__shell,
[data-bg-preset="gradient-ocean"]   .mvc-tab__shell,
[data-bg-preset="dark-mesh"]        .mvc-tab__shell,
[data-bg-preset="solid-primary"]    .mvc-tab__shell,
[data-bg-preset="solid-secondary"]  .mvc-tab__shell,
[data-bp-text="light"]              .mvc-tab__shell {
	background-color: rgba(255, 255, 255, 0.06);
	border-color: rgba(255, 255, 255, 0.22);
}

[data-bg-preset="gradient-brand"]   .mvc-tab__tablist,
[data-bg-preset="gradient-accent"]  .mvc-tab__tablist,
[data-bg-preset="gradient-sunrise"] .mvc-tab__tablist,
[data-bg-preset="gradient-ocean"]   .mvc-tab__tablist,
[data-bg-preset="dark-mesh"]        .mvc-tab__tablist,
[data-bg-preset="solid-primary"]    .mvc-tab__tablist,
[data-bg-preset="solid-secondary"]  .mvc-tab__tablist,
[data-bp-text="light"]              .mvc-tab__tablist {
	background-color: rgba(255, 255, 255, 0.06);
	border-block-end-color: rgba(255, 255, 255, 0.22);
	border-inline-end-color: rgba(255, 255, 255, 0.22);
}

[data-bg-preset="gradient-brand"]   .mvc-tab__tab,
[data-bg-preset="gradient-accent"]  .mvc-tab__tab,
[data-bg-preset="gradient-sunrise"] .mvc-tab__tab,
[data-bg-preset="gradient-ocean"]   .mvc-tab__tab,
[data-bg-preset="dark-mesh"]        .mvc-tab__tab,
[data-bg-preset="solid-primary"]    .mvc-tab__tab,
[data-bg-preset="solid-secondary"]  .mvc-tab__tab,
[data-bp-text="light"]              .mvc-tab__tab {
	color: rgba(255, 255, 255, 0.78);
}

[data-bg-preset="gradient-brand"]   .mvc-tab__tab:hover,
[data-bg-preset="gradient-accent"]  .mvc-tab__tab:hover,
[data-bg-preset="gradient-sunrise"] .mvc-tab__tab:hover,
[data-bg-preset="gradient-ocean"]   .mvc-tab__tab:hover,
[data-bg-preset="dark-mesh"]        .mvc-tab__tab:hover,
[data-bg-preset="solid-primary"]    .mvc-tab__tab:hover,
[data-bg-preset="solid-secondary"]  .mvc-tab__tab:hover,
[data-bp-text="light"]              .mvc-tab__tab:hover {
	color: #ffffff;
	background-color: rgba(255, 255, 255, 0.10);
}

/* Active tab on dark presets: the base rule lifts it onto white --color-surface,
   which would be white-on-white. Force a translucent-light surface + white label. */
[data-bg-preset="gradient-brand"]   .mvc-tab__tab[aria-selected="true"],
[data-bg-preset="gradient-accent"]  .mvc-tab__tab[aria-selected="true"],
[data-bg-preset="gradient-sunrise"] .mvc-tab__tab[aria-selected="true"],
[data-bg-preset="gradient-ocean"]   .mvc-tab__tab[aria-selected="true"],
[data-bg-preset="dark-mesh"]        .mvc-tab__tab[aria-selected="true"],
[data-bg-preset="solid-primary"]    .mvc-tab__tab[aria-selected="true"],
[data-bg-preset="solid-secondary"]  .mvc-tab__tab[aria-selected="true"],
[data-bp-text="light"]              .mvc-tab__tab[aria-selected="true"] {
	color: #ffffff;
	background-color: rgba(255, 255, 255, 0.16);
}

/* Underline + vertical-rail active accent stay visible on dark too. */
[data-bg-preset="gradient-brand"]   .mvc-tab--style-horizontal-underline .mvc-tab__tab[aria-selected="true"],
[data-bg-preset="gradient-accent"]  .mvc-tab--style-horizontal-underline .mvc-tab__tab[aria-selected="true"],
[data-bg-preset="gradient-sunrise"] .mvc-tab--style-horizontal-underline .mvc-tab__tab[aria-selected="true"],
[data-bg-preset="gradient-ocean"]   .mvc-tab--style-horizontal-underline .mvc-tab__tab[aria-selected="true"],
[data-bg-preset="dark-mesh"]        .mvc-tab--style-horizontal-underline .mvc-tab__tab[aria-selected="true"],
[data-bg-preset="solid-primary"]    .mvc-tab--style-horizontal-underline .mvc-tab__tab[aria-selected="true"],
[data-bg-preset="solid-secondary"]  .mvc-tab--style-horizontal-underline .mvc-tab__tab[aria-selected="true"],
[data-bp-text="light"]              .mvc-tab--style-horizontal-underline .mvc-tab__tab[aria-selected="true"] {
	border-block-end-color: #ffffff;
}

/* Quick-answer card: translucent dark surface + light text on dark presets. */
[data-bg-preset="gradient-brand"]   .mvc-tab__quick-answer,
[data-bg-preset="gradient-accent"]  .mvc-tab__quick-answer,
[data-bg-preset="gradient-sunrise"] .mvc-tab__quick-answer,
[data-bg-preset="gradient-ocean"]   .mvc-tab__quick-answer,
[data-bg-preset="dark-mesh"]        .mvc-tab__quick-answer,
[data-bg-preset="solid-primary"]    .mvc-tab__quick-answer,
[data-bg-preset="solid-secondary"]  .mvc-tab__quick-answer,
[data-bp-text="light"]              .mvc-tab__quick-answer {
	background-color: rgba(255, 255, 255, 0.10);
	border-inline-start-color: rgba(255, 255, 255, 0.55);
	color: rgba(255, 255, 255, 0.94);
}

/* Accordion-mode tab/panel surfaces on dark presets. */
[data-bg-preset="gradient-brand"]   [data-mvc-tab][data-mode="accordion"] .mvc-tab__tab,
[data-bg-preset="gradient-accent"]  [data-mvc-tab][data-mode="accordion"] .mvc-tab__tab,
[data-bg-preset="gradient-sunrise"] [data-mvc-tab][data-mode="accordion"] .mvc-tab__tab,
[data-bg-preset="gradient-ocean"]   [data-mvc-tab][data-mode="accordion"] .mvc-tab__tab,
[data-bg-preset="dark-mesh"]        [data-mvc-tab][data-mode="accordion"] .mvc-tab__tab,
[data-bg-preset="solid-primary"]    [data-mvc-tab][data-mode="accordion"] .mvc-tab__tab,
[data-bg-preset="solid-secondary"]  [data-mvc-tab][data-mode="accordion"] .mvc-tab__tab,
[data-bp-text="light"]              [data-mvc-tab][data-mode="accordion"] .mvc-tab__tab,
[data-bg-preset="gradient-brand"]   [data-mvc-tab][data-mode="accordion"] .mvc-tab__panel,
[data-bg-preset="gradient-accent"]  [data-mvc-tab][data-mode="accordion"] .mvc-tab__panel,
[data-bg-preset="gradient-sunrise"] [data-mvc-tab][data-mode="accordion"] .mvc-tab__panel,
[data-bg-preset="gradient-ocean"]   [data-mvc-tab][data-mode="accordion"] .mvc-tab__panel,
[data-bg-preset="dark-mesh"]        [data-mvc-tab][data-mode="accordion"] .mvc-tab__panel,
[data-bg-preset="solid-primary"]    [data-mvc-tab][data-mode="accordion"] .mvc-tab__panel,
[data-bg-preset="solid-secondary"]  [data-mvc-tab][data-mode="accordion"] .mvc-tab__panel,
[data-bp-text="light"]              [data-mvc-tab][data-mode="accordion"] .mvc-tab__panel {
	background-color: rgba(255, 255, 255, 0.08);
	border-color: rgba(255, 255, 255, 0.22);
}

/* Pill buttons keep a readable surface inside dark presets. */
[data-bg-preset="gradient-brand"]   .mvc-tab--style-pill-buttons .mvc-tab__tab,
[data-bg-preset="gradient-accent"]  .mvc-tab--style-pill-buttons .mvc-tab__tab,
[data-bg-preset="gradient-sunrise"] .mvc-tab--style-pill-buttons .mvc-tab__tab,
[data-bg-preset="gradient-ocean"]   .mvc-tab--style-pill-buttons .mvc-tab__tab,
[data-bg-preset="dark-mesh"]        .mvc-tab--style-pill-buttons .mvc-tab__tab,
[data-bg-preset="solid-primary"]    .mvc-tab--style-pill-buttons .mvc-tab__tab,
[data-bg-preset="solid-secondary"]  .mvc-tab--style-pill-buttons .mvc-tab__tab,
[data-bp-text="light"]              .mvc-tab--style-pill-buttons .mvc-tab__tab {
	border-color: rgba(255, 255, 255, 0.30);
	background-color: rgba(255, 255, 255, 0.08);
}

/* Active pill on dark presets: solid white pill + dark label = max contrast on
   any dark background (beats the generic translucent active rule above). */
[data-bg-preset="gradient-brand"]   .mvc-tab--style-pill-buttons .mvc-tab__tab[aria-selected="true"],
[data-bg-preset="gradient-accent"]  .mvc-tab--style-pill-buttons .mvc-tab__tab[aria-selected="true"],
[data-bg-preset="gradient-sunrise"] .mvc-tab--style-pill-buttons .mvc-tab__tab[aria-selected="true"],
[data-bg-preset="gradient-ocean"]   .mvc-tab--style-pill-buttons .mvc-tab__tab[aria-selected="true"],
[data-bg-preset="dark-mesh"]        .mvc-tab--style-pill-buttons .mvc-tab__tab[aria-selected="true"],
[data-bg-preset="solid-primary"]    .mvc-tab--style-pill-buttons .mvc-tab__tab[aria-selected="true"],
[data-bg-preset="solid-secondary"]  .mvc-tab--style-pill-buttons .mvc-tab__tab[aria-selected="true"],
[data-bp-text="light"]              .mvc-tab--style-pill-buttons .mvc-tab__tab[aria-selected="true"] {
	background-color: #ffffff;
	border-color: #ffffff;
	color: var(--color-primary);
}