/* Khối Hỏi đáp – faq/accordion (xếp chồng). Mobile trước, mốc 640px / 1024px. */

.vh-faq {
	display: grid;
	gap: 0.75rem;
	max-width: 52rem;
}

.vh-faq__item {
	background: var(--vh-color-card);
	color: var(--vh-color-text);
	border: 1px solid var(--vh-color-border);
	border-radius: var(--vh-radius-card);
}

.vh-faq__item[open] {
	border-color: var(--vh-color-border-strong);
}

/* Dòng câu hỏi cao tối thiểu 56px, cả dòng bấm được. */
.vh-faq__q {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 1rem;
	min-height: 56px;
	padding: 0.75rem var(--vh-card-pad);
	border-radius: var(--vh-radius-card);
	font-weight: var(--vh-fw-medium);
	font-size: var(--vh-fs-body);
	line-height: var(--vh-lh-body);
	cursor: pointer;
	list-style: none;
}

.vh-faq__q::-webkit-details-marker {
	display: none;
}

.vh-faq__q::marker {
	content: "";
}

.vh-faq__q:hover .vh-faq__q-text {
	color: var(--vh-color-primary-hover);
}

.vh-faq__q:focus-visible {
	outline: 3px solid var(--vh-color-focus);
	outline-offset: 2px;
}

.vh-faq__chev {
	flex: none;
	color: var(--vh-color-primary);
}

.vh-faq__item[open] .vh-faq__chev {
	transform: rotate(180deg);
}

.vh-faq__a {
	padding: 0 var(--vh-card-pad) var(--vh-card-pad);
	color: var(--vh-color-muted);
	font-size: var(--vh-fs-body);
	line-height: var(--vh-lh-body);
}

.vh-faq__a p {
	margin: 0 0 0.75rem;
}

.vh-faq__a p:last-child {
	margin-bottom: 0;
}

@media (prefers-reduced-motion: no-preference) {
	.vh-faq__chev {
		transition: transform 0.2s ease;
	}
}

@media (min-width: 1024px) {
	.vh-faq__q {
		font-size: var(--vh-fs-lead);
	}
}

/* =====================================================================
 * Tùy chọn của accordion (đợt mẫu mới): side-heading, đánh số, dấu +, thanh màu và tab chủ đề. Chỉ thêm lớp mới.
 * ===================================================================== */

/* Đánh số 01, 02… */
.vh-faq__num {
	flex: none;
	min-width: 2ch;
	color: var(--vh-color-accent-ink);
	font-family: var(--vh-font-accent, var(--vh-font-heading));
	font-variant-numeric: tabular-nums;
	font-weight: var(--vh-fw-body);
}

.vh-faq--numbered .vh-faq__q {
	justify-content: flex-start;
}

.vh-faq--numbered .vh-faq__q-text {
	flex: 1 1 auto;
	min-width: 0;
}

/* Dấu + mảnh xoay thành × khi mở. */
.vh-faq__plus {
	position: relative;
	flex: none;
	width: 20px;
	height: 20px;
	color: var(--vh-color-text);
}

.vh-faq__plus::before,
.vh-faq__plus::after {
	content: "";
	position: absolute;
	top: 50%;
	left: 0;
	width: 100%;
	height: 1.5px;
	margin-top: -0.75px;
	background: currentColor;
}

.vh-faq__plus::after {
	transform: rotate(90deg);
}

.vh-faq__item[open] .vh-faq__plus {
	transform: rotate(45deg);
}

@media (prefers-reduced-motion: no-preference) {
	.vh-faq__plus {
		transition: transform 0.2s ease;
	}
}

/* Kiểu mảnh (đi cùng dấu +): bỏ khung thẻ, chỉ còn đường kẻ. */
.vh-faq--plus .vh-faq__item {
	border-width: 0 0 1px;
	border-radius: 0;
	background: transparent;
}

.vh-faq--plus {
	gap: 0;
}

.vh-faq--plus .vh-faq__q,
.vh-faq--plus .vh-faq__a {
	padding-inline: 0;
}

/* Thanh màu theo chủ đề: --vh-color-fun-1…4 (trang trí, không mang nghĩa riêng; tên chủ đề luôn có chữ). */
.vh-faq__group {
	display: grid;
	gap: 0.75rem;
}

.vh-faq__group + .vh-faq__group {
	margin-top: 1.25rem;
}

.vh-faq__topic {
	display: flex;
	align-items: center;
	gap: 0.625rem;
	margin: 0;
	font-family: var(--vh-font-heading);
	font-size: var(--vh-fs-h3);
	font-weight: var(--vh-fw-heading);
	line-height: var(--vh-lh-heading);
}

.vh-faq__topic-bar {
	flex: none;
	width: 6px;
	height: 1.25em;
	border-radius: 3px;
	background: var(--vh-faq-bar, var(--vh-color-primary));
}

.vh-faq__group--c1,
.vh-faq__item--c1 {
	--vh-faq-bar: var(--vh-color-fun-1, var(--vh-color-primary));
}

.vh-faq__group--c2,
.vh-faq__item--c2 {
	--vh-faq-bar: var(--vh-color-fun-2, var(--vh-color-accent-ink));
}

.vh-faq__group--c3,
.vh-faq__item--c3 {
	--vh-faq-bar: var(--vh-color-fun-3, var(--vh-color-success));
}

.vh-faq__group--c4,
.vh-faq__item--c4 {
	--vh-faq-bar: var(--vh-color-fun-4, var(--vh-color-zalo));
}

.vh-faq--colour-bars .vh-faq__item {
	border-left: 6px solid var(--vh-faq-bar, var(--vh-color-primary));
}

/* Tab chủ đề. */
.vh-faq--tabs {
	gap: 0;
}

.vh-faq__panel {
	display: grid;
	gap: 0.75rem;
}

.vh-faq__panel[hidden] {
	display: none;
}

.vh-faq__panel:focus-visible {
	outline: 3px solid var(--vh-color-focus);
	outline-offset: 4px;
	border-radius: var(--vh-radius-card);
}

/* side-heading: tiêu đề + câu gọi bên trái, câu hỏi bên phải (từ 1024px). */
.vh-faq-side {
	display: grid;
	gap: 0;
}

.vh-faq-side__head .vh-section-head {
	margin-bottom: 0.75rem;
}

.vh-faq-side__help {
	display: grid;
	justify-items: start;
	gap: 0.25rem;
	margin: 0 0 clamp(1.5rem, 4vw, 2rem);
	color: var(--vh-color-muted);
	line-height: var(--vh-lh-body);
}

.vh-faq-side__call {
	font-weight: var(--vh-fw-medium);
}

@media (min-width: 1024px) {
	.vh-faq-side {
		grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
		gap: clamp(2rem, 4vw, 4rem);
		align-items: start;
	}

	.vh-faq-side__head {
		position: sticky;
		top: calc(var(--vh-top-h, var(--vh-header-h)) + 1.5rem);
	}

	.vh-faq-side .vh-faq {
		max-width: none;
	}
}