/**
 * Sectioned quiz styles -- multi-section exam layout.
 *
 * Uses lrn-sect__* prefix. All values reference --lrn-* tokens.
 *
 * @package Learnomy
 */

/* ==========================================================================
   Top bar: section name + progress segments + timer
   ========================================================================== */

.lrn-sect__top-bar {
	position: sticky;
	top: 0;
	z-index: 10;
	display: flex;
	align-items: center;
	gap: var(--lrn-sp-4);
	padding: var(--lrn-sp-3) var(--lrn-sp-4);
	background: var(--lrn-bg);
	background: color-mix(in srgb, var(--lrn-bg) 85%, transparent);
	-webkit-backdrop-filter: blur(12px);
	backdrop-filter: blur(12px);
	border-bottom: 1px solid var(--lrn-border);
	border-radius: var(--lrn-radius-lg) var(--lrn-radius-lg) 0 0;
}

.lrn-sect__section-info {
	display: flex;
	flex-direction: column;
	gap: 2px;
	flex-shrink: 0;
}

.lrn-sect__section-name {
	font-size: var(--lrn-text-sm);
	font-weight: var(--lrn-weight-semibold);
	color: var(--lrn-text);
	white-space: nowrap;
}

.lrn-sect__section-counter {
	font-size: var(--lrn-text-xs);
	color: var(--lrn-text-tertiary);
	white-space: nowrap;
}

/* ==========================================================================
   Progress segments -- one block per section
   ========================================================================== */

.lrn-sect__progress-wrap {
	flex: 1;
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: var(--lrn-sp-1);
	min-width: 0;
}

.lrn-sect__progress-segments {
	display: flex;
	gap: 3px;
	width: 100%;
	height: 6px;
}

.lrn-sect__progress-segment {
	flex: 1;
	height: 100%;
	border-radius: 3px;
	background: var(--lrn-border);
	transition: background-color var(--lrn-dur) var(--lrn-ease);
}

/* Active section -- accent color */
.lrn-sect__progress-segment--active {
	background: var(--lrn-accent);
}

/* Completed section -- success color */
.lrn-sect__progress-segment--completed {
	background: var(--lrn-success);
}

/* Locked section -- muted success with opacity */
.lrn-sect__progress-segment--locked {
	background: var(--lrn-success);
	opacity: 0.6;
}

.lrn-sect__overall-progress {
	font-size: var(--lrn-text-xs);
	color: var(--lrn-text-tertiary);
	white-space: nowrap;
}

/* ==========================================================================
   Section intro card -- full-width centered between sections
   ========================================================================== */

.lrn-sect__intro {
	display: flex;
	align-items: center;
	justify-content: center;
	min-height: 400px;
	padding: var(--lrn-sp-8);
}

.lrn-sect__intro-card {
	text-align: center;
	max-width: 640px;
	width: 100%;
	padding: var(--lrn-sp-10) var(--lrn-sp-8);
}

.lrn-sect__intro-badge {
	display: inline-block;
	font-size: var(--lrn-text-xs);
	font-weight: var(--lrn-weight-semibold);
	text-transform: uppercase;
	letter-spacing: 0.08em;
	color: var(--lrn-accent);
	background: var(--lrn-accent-bg);
	padding: var(--lrn-sp-1) var(--lrn-sp-3);
	border-radius: var(--lrn-radius-full);
	margin-bottom: var(--lrn-sp-4);
}

.lrn-sect__intro-title {
	font-size: var(--lrn-text-xl);
	font-weight: var(--lrn-weight-semibold);
	margin: 0 0 var(--lrn-sp-2);
	color: var(--lrn-text);
}

.lrn-sect__intro-meta {
	font-size: var(--lrn-text-sm);
	color: var(--lrn-text-secondary);
	margin: 0 0 var(--lrn-sp-8);
}

.lrn-sect__intro-btn {
	min-width: 180px;
}

/* ==========================================================================
   Question area
   ========================================================================== */

.lrn-sect__question-area {
	padding: var(--lrn-sp-6) var(--lrn-sp-4);
}

/* ==========================================================================
   Review: section groups
   ========================================================================== */

.lrn-sect__review-group {
	margin-bottom: var(--lrn-sp-8);
}

.lrn-sect__review-group-title {
	font-size: var(--lrn-text-sm);
	font-weight: var(--lrn-weight-semibold);
	text-transform: uppercase;
	letter-spacing: 0.05em;
	color: var(--lrn-text-tertiary);
	margin: 0 0 var(--lrn-sp-4);
	padding-bottom: var(--lrn-sp-2);
	border-bottom: 1px solid var(--lrn-divider);
}

/* ==========================================================================
   Responsive: mobile adjustments
   ========================================================================== */

@media (max-width: 768px) {
	.lrn-sect__top-bar {
		flex-wrap: wrap;
		padding: var(--lrn-sp-2) var(--lrn-sp-3);
		gap: var(--lrn-sp-2);
	}

	.lrn-sect__section-info {
		flex-direction: row;
		gap: var(--lrn-sp-2);
		align-items: baseline;
	}

	.lrn-sect__progress-wrap {
		order: 3;
		width: 100%;
	}

	.lrn-sect__intro {
		min-height: 300px;
		padding: var(--lrn-sp-4);
	}

	.lrn-sect__intro-card {
		padding: var(--lrn-sp-6) var(--lrn-sp-4);
	}

	.lrn-sect__question-area {
		padding: var(--lrn-sp-4) var(--lrn-sp-3);
	}
}

@media (max-width: 640px) {
	.lrn-sect__top-bar .lrn-quiz__timer {
		order: 2;
		margin-inline-start: auto;
	}
}

/* ==========================================================================
   Reduced motion
   ========================================================================== */

@media ( prefers-reduced-motion: reduce ) {
	.lrn-sect__progress-segment {
		transition: none;
	}
}

/* Small phones — plan-02 phase D */
@media (max-width: 640px) {
	.lrn-sect__question,
	.lrn-sect__card {
		padding: var(--lrn-sp-3);
	}

	.lrn-sect__timer {
		font-size: var(--lrn-text-sm);
	}

	.lrn-sect__nav,
	.lrn-sect__actions {
		flex-direction: column;
		gap: var(--lrn-sp-2);
	}

	.lrn-sect__nav .lrn-btn,
	.lrn-sect__actions .lrn-btn {
		width: 100%;
		justify-content: center;
	}
}

/* ── Free section-navigation picker (BC #9993392864) ────────────────────── */
.lrn-sect__picker-card {
	max-width: 640px;
	margin-inline: auto;
	text-align: center;
	padding: var(--lrn-sp-6, 1.5rem);
}

.lrn-sect__picker-title {
	margin: 0 0 var(--lrn-sp-2);
}

.lrn-sect__picker-help {
	margin: 0 0 var(--lrn-sp-4);
	color: var(--lrn-text-secondary);
}

.lrn-sect__picker-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
	gap: var(--lrn-sp-3);
	margin-bottom: var(--lrn-sp-5);
}

.lrn-sect__picker-item {
	position: relative;
	display: flex;
	flex-direction: column;
	gap: var(--lrn-sp-1);
	padding: var(--lrn-sp-4) var(--lrn-sp-3);
	background: var(--lrn-bg);
	border: 1px solid var(--lrn-border);
	border-radius: var(--lrn-radius-lg);
	font: inherit;
	cursor: pointer;
	transition: border-color var(--lrn-dur) var(--lrn-ease), background var(--lrn-dur) var(--lrn-ease);
}

.lrn-sect__picker-item:hover,
.lrn-sect__picker-item:focus-visible {
	border-color: var(--lrn-accent);
	background: var(--lrn-accent-bg);
}

.lrn-sect__picker-item.is-current {
	border-color: var(--lrn-accent);
}

.lrn-sect__picker-item-name {
	font-weight: 600;
	color: var(--lrn-text);
}

.lrn-sect__picker-item-count {
	color: var(--lrn-text-secondary);
	font-variant-numeric: tabular-nums;
}

.lrn-sect__picker-item-check {
	position: absolute;
	inset-block-start: var(--lrn-sp-2);
	inset-inline-end: var(--lrn-sp-2);
	width: 1em;
	height: 1em;
	opacity: 0;
	color: var(--lrn-accent);
}

.lrn-sect__picker-item.is-complete .lrn-sect__picker-item-check {
	opacity: 1;
}

.lrn-sect__to-picker {
	margin-inline-end: var(--lrn-sp-2);
}