/*
 * Blog — layout magazine: ưu tiên hình ảnh, khối chữ ngắn, dễ quét mắt.
 */

/* ---------- Toolbar (tìm kiếm + lọc) ---------- */

.blog-toolbar {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: var(--space-sm);
	padding-bottom: var(--space-md);
	margin-bottom: var(--space-lg);
	border-bottom: 1px solid var(--color-border);
}

.blog-search {
	position: relative;
	display: flex;
	align-items: center;
	flex: 1 1 260px;
}

.blog-search__icon {
	position: absolute;
	left: var(--space-sm);
	color: var(--color-text-muted);
	pointer-events: none;
}

.blog-search input[type='search'] {
	width: 100%;
	padding: var(--space-xs) var(--space-sm) var(--space-xs) calc(var(--space-md) + var(--space-xs));
	background: var(--color-bg-alt);
	border: 1px solid var(--color-border);
	border-radius: var(--radius);
	color: var(--color-text);
	font-family: var(--font-body);
	font-size: var(--fs-small);
	transition: border-color var(--transition-base);
}

.blog-search input[type='search']:focus {
	outline: none;
	border-color: var(--color-gold);
}

.blog-filter-date select {
	padding: var(--space-xs) var(--space-sm);
	background: var(--color-bg-alt);
	border: 1px solid var(--color-border);
	border-radius: var(--radius);
	color: var(--color-text);
	font-family: var(--font-body);
	font-size: var(--fs-small);
	cursor: pointer;
}

.blog-filter-date select:focus {
	outline: none;
	border-color: var(--color-gold);
}

.blog-cats {
	display: flex;
	flex-wrap: wrap;
	gap: var(--space-xs);
}

.blog-cats__item {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	padding: var(--space-xs) var(--space-sm);
	border: 1px solid var(--color-border);
	font-size: var(--fs-small);
	color: var(--color-text-muted);
	text-transform: uppercase;
	letter-spacing: 0.06em;
	transition: border-color var(--transition-base), color var(--transition-base);
}

.blog-cats__item:hover,
.blog-cats__item.is-active {
	border-color: var(--color-gold);
	color: var(--color-gold);
}

.blog-cats__count {
	font-size: 0.7rem;
	color: var(--color-gold);
}

.post-grid__empty {
	padding: var(--space-md) 0;
	color: var(--color-text-muted);
	font-size: var(--fs-small);
}

/* ---------- Grid bài viết ---------- */

.post-grid {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: var(--space-md) var(--space-sm);
}

.post-card {
	display: flex;
	flex-direction: column;
	gap: var(--space-xs);
}

.post-card__media {
	display: block;
	aspect-ratio: 16 / 9;
	overflow: hidden;
	background: var(--color-bg-alt);
	border: 1px solid var(--color-border);
}

.post-card__media img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	transition: transform var(--transition-base), filter var(--transition-base);
	filter: grayscale(0.25);
}

.post-card:hover .post-card__media img {
	transform: scale(1.04);
	filter: grayscale(0);
}

.post-card__meta {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: var(--space-xs);
	font-size: 0.75rem;
	color: var(--color-text-muted);
	text-transform: uppercase;
	letter-spacing: 0.1em;
}

.post-card__cat {
	color: var(--color-gold);
}

.post-card__read::before {
	content: '·';
	margin-right: var(--space-xs);
}

.post-card__title {
	margin: 0;
	font-size: var(--fs-h3);
	line-height: 1.2;
}

.post-card__title a {
	transition: color var(--transition-base);
}

.post-card:hover .post-card__title a {
	color: var(--color-gold);
}

.post-card__excerpt {
	margin: 0;
	font-size: var(--fs-small);
}

.post-card__more {
	font-size: var(--fs-small);
	color: var(--color-gold);
	opacity: 0;
	transform: translateX(-6px);
	transition: opacity var(--transition-base), transform var(--transition-base);
}

.post-card:hover .post-card__more {
	opacity: 1;
	transform: translateX(0);
}

/* Bài mới nhất: chiếm 2 cột, ảnh lớn, chữ to hơn */
.post-card--featured {
	grid-column: span 2;
	grid-row: span 1;
}

.post-card--featured .post-card__media {
	aspect-ratio: 21 / 9;
}

.post-card--featured .post-card__title {
	font-size: var(--fs-h2);
}

.post-card--featured .post-card__excerpt {
	font-size: var(--fs-body);
	max-width: 60ch;
}

/* Khi đang lọc: bỏ cỡ lớn để lưới đều nhau */
.post-grid.is-filtering .post-card--featured {
	grid-column: span 1;
}

.post-grid.is-filtering .post-card--featured .post-card__media {
	aspect-ratio: 16 / 9;
}

.post-grid.is-filtering .post-card--featured .post-card__title {
	font-size: var(--fs-h3);
}

/* ---------- Single post ---------- */

.single-post__header {
	padding-top: clamp(6rem, 14vw, 10rem); /* chừa chỗ cho fixed header, co lại trên mobile */
	padding-bottom: var(--space-md);
	max-width: 820px;
}

.single-post__title {
	margin-bottom: var(--space-sm);
}

.single-post__meta {
	display: flex;
	flex-wrap: wrap;
	gap: var(--space-sm);
	font-size: var(--fs-small);
	color: var(--color-text-muted);
	text-transform: uppercase;
	letter-spacing: 0.1em;
	margin-bottom: var(--space-sm);
}

.single-post__lede {
	font-size: var(--fs-h3);
	font-weight: 300;
	line-height: 1.5;
	color: var(--color-cream);
	max-width: 60ch;
}

.single-post__cover {
	margin-bottom: var(--space-lg);
}

.single-post__cover img {
	width: 100%;
	height: auto;
	display: block;
	border: 1px solid var(--color-border);
}

.single-post__content {
	max-width: 68ch;
	margin-inline: auto;
	font-size: 1.0625rem;
	line-height: 1.75;
}

.single-post__content p {
	margin-bottom: var(--space-sm);
	color: var(--color-text);
}

/* Đoạn mở đầu to hơn — dẫn mắt vào bài */
.single-post__content > p:first-of-type {
	font-size: 1.1875rem;
	color: var(--color-cream);
}

.single-post__content h2 {
	margin-top: var(--space-lg);
	margin-bottom: var(--space-sm);
	font-size: var(--fs-h3);
	padding-left: var(--space-sm);
	border-left: 2px solid var(--color-gold);
}

.single-post__content h3 {
	margin-top: var(--space-md);
	font-size: 1.125rem;
}

.single-post__content img {
	width: 100%;
	height: auto;
	margin-block: var(--space-md);
	border: 1px solid var(--color-border);
}

.single-post__content blockquote {
	margin: var(--space-md) 0;
	padding-left: var(--space-md);
	border-left: 2px solid var(--color-gold);
	font-family: var(--font-display);
	font-stretch: var(--font-stretch-display);
	font-size: var(--fs-h3);
	font-weight: 600;
	color: var(--color-cream);
}

.single-post__content ul,
.single-post__content ol {
	margin: 0 0 var(--space-sm) var(--space-md);
	color: var(--color-text);
}

.single-post__content li {
	margin-bottom: var(--space-xs);
}

.single-post__content strong {
	color: var(--color-cream);
}

.single-post__footer {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: space-between;
	gap: var(--space-sm);
	max-width: 68ch;
	margin: var(--space-lg) auto 0;
	padding-top: var(--space-md);
	border-top: 1px solid var(--color-border);
}

.post-grid--related {
	grid-template-columns: repeat(3, 1fr);
}

/* ---------- Pagination ---------- */

.pagination {
	display: flex;
	justify-content: center;
	margin-top: var(--space-lg);
}

.pagination .nav-links {
	display: flex;
	gap: var(--space-xs);
	flex-wrap: wrap;
}

.pagination .page-numbers {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	min-width: 40px;
	height: 40px;
	padding-inline: var(--space-xs);
	border: 1px solid var(--color-border);
	font-size: var(--fs-small);
	color: var(--color-text-muted);
	transition: border-color var(--transition-base), color var(--transition-base);
}

.pagination .page-numbers:hover,
.pagination .page-numbers.current {
	border-color: var(--color-gold);
	color: var(--color-gold);
}

/* ---------- Responsive ---------- */

@media (max-width: 1000px) {
	.post-grid,
	.post-grid--related {
		grid-template-columns: repeat(2, 1fr);
	}

	.post-card--featured {
		grid-column: span 2;
	}
}

@media (max-width: 640px) {
	.post-grid,
	.post-grid--related {
		grid-template-columns: 1fr;
	}

	.post-card--featured,
	.post-grid.is-filtering .post-card--featured {
		grid-column: span 1;
	}

	.post-card--featured .post-card__media {
		aspect-ratio: 16 / 9;
	}

	.post-card--featured .post-card__title {
		font-size: var(--fs-h3);
	}
}