/* BlogRead modern frontend shared CSS.
 *
 * Loaded on both IT and news modern templates alongside Bootstrap 5.
 * Source of truth: openspec/changes/modernize-frontend-reading-ui/demo/shared.css
 * (this file tracks that demo CSS; keep in sync until demos retire).
 */

:root {
	--br-page: #f4f6f8;
	--br-card: #ffffff;
	--br-text: #1f2328;
	--br-muted: #667085;
	--br-faint: #98a2b3;
	--br-line: #e4e7ec;
	--br-line-soft: #eef0f3;
	--br-accent: #eb7350;
	--br-accent-soft: #fff1ec;
	--br-blue: #2563eb;
	--br-green: #168257;
	--br-code-bg: #111827;
	--br-code-line: #263244;
	--br-code-text: #d1d5db;
}

* { box-sizing: border-box; }
html { font-size: 16px; }
body {
	background: var(--br-page);
	color: var(--br-text);
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
	line-height: 1.65;
}
a { color: inherit; text-decoration: none; }
a:hover { color: var(--br-accent); }
.br-shell { max-width: 1180px; margin: 0 auto; padding: 24px 20px 48px; }
.br-topbar {
	position: sticky;
	top: 0;
	z-index: 20;
	background: rgba(255, 255, 255, .94);
	border-bottom: 1px solid var(--br-line);
	backdrop-filter: blur(12px);
}
.br-topbar-inner {
	max-width: 1180px;
	margin: 0 auto;
	padding: 12px 20px;
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 20px;
}
.br-brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; }
/* 副标语：跟在站点名后的灰色小字（"共学习 共进步"）。继承 brand 的 center
   对齐，单独给小字尺寸和浅色；窄屏下 display:none 让位给核心导航。 */
.br-brand-slogan {
	color: var(--br-faint);
	font-size: 12px;
	font-weight: 400;
	white-space: nowrap;
}
@media (max-width: 680px) {
	.br-brand-slogan { display: none; }
}
.br-brand-mark {
	width: 30px;
	height: 30px;
	border-radius: 8px;
	background: #1f2328;
	color: #fff;
	display: grid;
	place-items: center;
	font-size: 13px;
	font-weight: 700;
}
/* Brand logo：it/images/itblog.png 是 180x180 的设计稿，这里缩到 28px。
   object-fit:contain 保持比例；没有 image-rendering:pixelated 因为它不是像素艺术。 */
.br-brand-logo {
	width: 28px;
	height: 28px;
	display: block;
	object-fit: contain;
	flex-shrink: 0;
}
.br-nav { display: flex; align-items: center; gap: 18px; color: var(--br-muted); font-size: 14px; white-space: nowrap; }
.br-nav-dropdown-toggle { cursor: pointer; user-select: none; }
.br-nav-dropdown-toggle:hover { color: var(--br-accent); }
/* BS5 dropdown-menu 默认单列，分类数量多时占用高度过大 —— 这里按内容自然折成 2 列。
   各项之间保留细线分隔，点击区域给足 padding，符合下拉菜单常规交互。 */
.br-cate-menu.dropdown-menu {
	min-width: 320px;
	max-height: 70vh;
	overflow-y: auto;
	padding: 8px;
	columns: 2;
	column-gap: 12px;
	border: 1px solid var(--br-line);
	border-radius: 8px;
	box-shadow: 0 8px 28px rgba(17, 24, 39, 0.08);
}
.br-cate-menu.dropdown-menu .dropdown-item {
	break-inside: avoid;
	padding: 6px 10px;
	border-radius: 6px;
	font-size: 14px;
	color: var(--br-text);
}
.br-cate-menu.dropdown-menu .dropdown-item:hover,
.br-cate-menu.dropdown-menu .dropdown-item:focus {
	background: var(--br-accent-soft);
	color: #9a3412;
}
.br-layout { display: grid; grid-template-columns: minmax(0, 1fr) 304px; gap: 20px; }
.br-stack { display: grid; gap: 14px; align-content: start; }
.br-section-head,
.br-card,
.br-side-card,
.br-read-panel {
	background: var(--br-card);
	border: 1px solid var(--br-line);
	border-radius: 8px;
}
.br-section-head {
	padding: 16px 18px;
	display: flex;
	align-items: flex-end;
	justify-content: space-between;
	gap: 18px;
}
.br-section-head h1 { margin: 0; font-size: 22px; line-height: 1.3; letter-spacing: 0; }
.br-section-head p { margin: 5px 0 0; color: var(--br-muted); font-size: 14px; }
.br-filter-row { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px; }
.br-filter {
	height: 30px;
	padding: 0 11px;
	border: 1px solid var(--br-line);
	border-radius: 999px;
	background: #fff;
	color: var(--br-muted);
	font-size: 13px;
	display: inline-flex;
	align-items: center;
}
.br-filter.active { color: #9a3412; background: var(--br-accent-soft); border-color: #ffd5c7; }
.br-article-card { overflow: hidden; }
.br-article-card.featured { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(220px, .8fr); }
.br-card-main { padding: 20px; min-width: 0; }
.br-card-side {
	padding: 18px;
	background: #fbfcfd;
	border-left: 1px solid var(--br-line-soft);
	display: grid;
	gap: 14px;
	align-content: space-between;
}
.br-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; color: var(--br-muted); font-size: 13px; margin-bottom: 8px; }
.br-source-dot {
	width: 20px;
	height: 20px;
	border-radius: 6px;
	background: #eef2ff;
	color: #3730a3;
	display: inline-grid;
	place-items: center;
	font-size: 11px;
	font-weight: 700;
}
.br-dot { color: #c4c9d2; }
.br-card-title { margin: 0; font-size: 21px; line-height: 1.42; letter-spacing: 0; }
.featured .br-card-title { font-size: 25px; line-height: 1.35; }
.br-summary { margin: 10px 0 0; color: #475467; font-size: 15px; line-height: 1.75; }
.br-tags { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 14px; }
.br-tag {
	display: inline-flex;
	align-items: center;
	min-height: 24px;
	padding: 2px 8px;
	border: 1px solid var(--br-line);
	border-radius: 999px;
	color: var(--br-muted);
	background: #fff;
	font-size: 12px;
}
.br-stats { margin-top: 14px; display: flex; flex-wrap: wrap; gap: 14px; color: var(--br-faint); font-size: 13px; }
.br-plain-card {
	padding: 17px 20px;
	display: grid;
	grid-template-columns: minmax(0, 1fr) 132px;
	gap: 18px;
	align-items: center;
}
/* 无图时折叠掉右侧 132px 缩略图列，文字占满整行。
   由 PHP 侧根据 list_thumb_src 是否为空给 article 打这个修饰类。 */
.br-plain-card--no-thumb {
	grid-template-columns: minmax(0, 1fr);
}
.br-thumb {
	aspect-ratio: 16 / 10;
	border: 1px solid var(--br-line);
	border-radius: 8px;
	overflow: hidden;
	background: #fff;
	position: relative;
	display: grid;
	place-items: end start;
	padding: 14px;
	min-height: 120px;
}
.br-thumb img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: 0; }
.br-thumb::before {
	content: "";
	position: absolute;
	inset: 0;
	background:
		linear-gradient(135deg, rgba(37, 99, 235, .13), transparent 44%),
		linear-gradient(315deg, rgba(22, 130, 87, .12), transparent 48%),
		#fff;
}
.br-thumb.is-cached::before { display: none; }  /* real <img> takes over the slot */
.br-thumb.is-missing::before {
	background:
		linear-gradient(135deg, rgba(235, 115, 80, .12), transparent 45%),
		linear-gradient(315deg, rgba(37, 99, 235, .10), transparent 50%),
		#fff;
}
.br-thumb-label {
	position: relative;
	z-index: 1;
	display: inline-flex;
	align-items: center;
	min-height: 26px;
	padding: 3px 9px;
	border-radius: 999px;
	background: rgba(255, 255, 255, .86);
	color: #344054;
	font-size: 12px;
	border: 1px solid rgba(228, 231, 236, .9);
}
.is-cached .br-thumb-label { color: #fff; background: rgba(17, 24, 39, .72); border-color: rgba(255,255,255,.22); }
.br-compact-thumb { min-height: 86px; padding: 12px; align-content: center; }
.br-side-card { padding: 16px; min-width: 0; overflow: hidden; }
.br-side-card h2 { margin: 0 0 12px; font-size: 15px; line-height: 1.4; }
.br-rank-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.br-rank-list li { display: grid; grid-template-columns: 22px minmax(0, 1fr); gap: 9px; font-size: 14px; line-height: 1.45; }
.br-rank { color: var(--br-accent); font-weight: 700; font-size: 13px; }
.br-rank-list small { display: block; color: var(--br-faint); margin-top: 2px; }
.br-read-panel { padding: 28px; }
.br-kicker { color: var(--br-muted); font-size: 13px; margin-bottom: 8px; }
/* 列表页页头：kicker + h1 + meta。与 article 页的 br-read-title 共用同一个
   h1 样式，保持列表页和详情页的视觉层级一致。 */
.br-page-header { margin: 0 0 16px; }
.br-page-header .br-read-title { font-size: 28px; line-height: 1.3; }
.br-page-meta { margin: 6px 0 0; color: var(--br-muted); font-size: 14px; }
.br-read-title { margin: 0; font-size: 32px; line-height: 1.25; letter-spacing: 0; }
.br-read-meta { margin: 12px 0 14px; color: var(--br-muted); font-size: 14px; display: flex; gap: 10px; flex-wrap: wrap; }
/* 标签行：紧跟 read-meta 之下，作为文章元信息的一部分。$tags 来自 PHP 端已渲染
   的 <a href="...">tagname</a> 串，这里只给容器 padding + 排版，不覆盖内联链接色。 */
.br-article-tags { margin: 0 0 22px; display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.br-article-tags-label { color: var(--br-faint); font-size: 13px; }
.br-article-tags a {
	display: inline-flex;
	align-items: center;
	min-height: 24px;
	padding: 2px 10px;
	border: 1px solid var(--br-line);
	border-radius: 999px;
	color: var(--br-muted);
	background: #fff;
	font-size: 12px;
	text-decoration: none;
}
.br-article-tags a:hover { color: var(--br-accent); border-color: #ffd5c7; background: var(--br-accent-soft); }

/* channel.php 博主页的 meta 块：站点链接 + 微博昵称。
   行内 pill（类似 /it/channel/XX 里曾经放在主列顶部的样式）保留以防被复用；
   侧栏版本走 .br-channel-info-stacked —— 每条独立一行以配合窄列。 */
.br-channel-info { margin: 10px 0 0; display: flex; flex-wrap: wrap; gap: 10px; }
.br-channel-info a {
	display: inline-flex;
	align-items: center;
	gap: 8px;
	padding: 6px 12px;
	border: 1px solid var(--br-line);
	border-radius: 999px;
	background: #fff;
	color: var(--br-muted);
	font-size: 13px;
	line-height: 1.4;
	text-decoration: none;
}
.br-channel-info a:hover { color: var(--br-accent); border-color: #ffd5c7; background: var(--br-accent-soft); }
.br-channel-icon {
	display: inline-grid;
	place-items: center;
	width: 20px;
	height: 20px;
	border-radius: 6px;
	background: #eef2ff;
	color: #3730a3;
	font-size: 12px;
	font-weight: 700;
	flex-shrink: 0;
}
.br-channel-host {
	color: var(--br-faint);
	font-size: 12px;
	max-width: 280px;
	overflow: hidden;
	text-overflow: ellipsis;
	white-space: nowrap;
}

/* 博主信息侧栏卡：掘金风 —— "博主信息" eyebrow + 博主名 + 文章数 + 堆叠链接
   每条 <a> 内部是两列：icon + 文字块；文字块自己是两行（label 粗体 + host 淡色省略）。
   min-width:0 让 flex 允许 host 文字 shrink 到省略号触发，避免长 URL 顶掉 label。 */
.br-channel-card .br-channel-eyebrow {
	display: inline-flex;
	align-items: center;
	padding: 2px 8px;
	margin: 0 0 8px;
	background: var(--br-accent-soft);
	color: #9a3412;
	border-radius: 4px;
	font-size: 11px;
	font-weight: 600;
	letter-spacing: 0.04em;
}
.br-channel-card h2 { margin: 0 0 4px; font-size: 17px; line-height: 1.35; }
.br-channel-meta { margin: 0 0 12px; color: var(--br-faint); font-size: 13px; }
/* 单行紧凑布局：icon + label（粗一点）+ host（弱灰，ellipsis 截断），
   整个锚点 ~28-32px 高，接近掘金 profile 卡片里的外链行。 */
.br-channel-info-stacked { flex-direction: column; align-items: stretch; margin: 0; gap: 2px; }
.br-channel-info-stacked a {
	border-radius: 6px;
	justify-content: flex-start;
	padding: 4px 6px;
	align-items: center;
	gap: 6px;
	min-width: 0;
	overflow: hidden;
	font-size: 13px;
	line-height: 1.4;
}
.br-channel-info-stacked .br-channel-icon {
	margin-top: 0;
	width: 18px;
	height: 18px;
	font-size: 11px;
	flex-shrink: 0;
}
.br-channel-info-stacked .br-channel-link-text {
	display: flex;
	flex-direction: row;
	align-items: baseline;
	min-width: 0;
	flex: 1 1 0;
	width: 0;
	gap: 6px;
	overflow: hidden;
}
.br-channel-info-stacked .br-channel-link-label {
	color: var(--br-text);
	font-weight: 500;
	flex-shrink: 0;
}
.br-channel-info-stacked .br-channel-host {
	display: block;
	min-width: 0;
	flex: 1 1 0;
	margin: 0;
	color: var(--br-faint);
	font-size: 12px;
	overflow: hidden;
	text-overflow: ellipsis;
	white-space: nowrap;
}
.br-article-body { font-size: 16px; color: #344054; }
.br-article-body p { margin: 14px 0; line-height: 1.9; }
.br-article-body blockquote { margin: 18px 0; padding: 2px 0 2px 16px; border-left: 3px solid var(--br-accent); color: #475467; }
.br-code-block { margin: 18px 0; border-radius: 8px; background: var(--br-code-bg); border: 1px solid var(--br-code-line); overflow: auto; }
.br-code-toolbar {
	height: 34px;
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: 0 12px;
	border-bottom: 1px solid var(--br-code-line);
	color: #9ca3af;
	font-size: 12px;
}
.br-code-block pre { margin: 0; padding: 14px; color: var(--br-code-text); font: 13px/1.7 Consolas, "SFMono-Regular", Menlo, monospace; }
.br-nextprev { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.br-news-item { display: grid; grid-template-columns: 58px minmax(0, 1fr) 132px; gap: 16px; padding: 16px 18px; align-items: center; }
.br-vote { color: var(--br-muted); font-size: 12px; text-align: center; }
.br-vote strong { display: block; color: var(--br-accent); font-size: 20px; line-height: 1.2; }
/* 心形点赞图标（Unicode，免字体依赖）：
   - .like-btn 未点赞：镂空心 ♡，灰色
   - .like-btn-already 已点赞：实心心 ♥，橙色
   legacy 模板走 Bootstrap 3 glyphicons 字体；modern 只加载 BS5 没 glyphicons，
   这里用 ::before 兜底，JS 切换 class 时自动跟着切换。 */
.br-vote .like-btn::before,
.br-vote .like-btn-already::before {
	display: block;
	font-size: 20px;
	line-height: 1.1;
	margin-bottom: 2px;
}
.br-vote .like-btn::before { content: "\2661"; color: var(--br-muted); }
.br-vote .like-btn-already::before { content: "\2665"; color: var(--br-accent); }
/* 列表里把原 glyphicon 基础类去空（没字体时它是 display:inline-block 0x0 占位） */
.br-vote .glyphicon { display: inline-block; }
.br-discussion { display: grid; gap: 12px; }
.br-comment { padding: 14px; border: 1px solid var(--br-line-soft); border-radius: 8px; background: #fbfcfd; }
.br-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.br-button {
	display: inline-flex;
	align-items: center;
	min-height: 34px;
	padding: 6px 12px;
	border-radius: 6px;
	border: 1px solid var(--br-line);
	background: #fff;
	color: var(--br-muted);
	font-size: 14px;
}
.br-button.primary { color: #fff; background: var(--br-accent); border-color: var(--br-accent); }
.br-pagination { display: flex; justify-content: center; margin: 24px 0 0; }
.br-pagination .pagination { margin: 0; padding: 0; list-style: none; display: flex; flex-wrap: wrap; gap: 6px; }
/* yayuPage 'bootstrap' style outputs BS3 markup `<li><a>...</a></li>` and
   `<li class="active"><a>`. These shim rules normalize that output inside
   modern pages without forking yayuPage. A dedicated `bootstrap5` style
   can be added later; not required for 5.3. */
.br-pagination .pagination li { margin: 0; }
.br-pagination .pagination li a {
	display: inline-block;
	padding: 6px 12px;
	border: 1px solid var(--br-line);
	border-radius: 6px;
	color: var(--br-muted);
	background: #fff;
	font-size: 14px;
	line-height: 1.4;
	text-decoration: none;
}
.br-pagination .pagination li a:hover { color: var(--br-accent); border-color: #ffd5c7; background: var(--br-accent-soft); }
.br-pagination .pagination li.active a { background: var(--br-accent); color: #fff; border-color: var(--br-accent); cursor: default; }

/* Article body carries an extra .it-article-content class so /it/css/article-content.css
   continues to own code-block / image / typography rules that the public page
   already depends on (Prism + code actions + line numbers). shared.css only owns
   the outer reading frame. */
.br-read-panel .it-article-content img { max-width: 100%; height: auto; }

@media (max-width: 900px) {
	.br-layout { grid-template-columns: 1fr; }
	.br-sidebar { grid-template-columns: repeat(2, minmax(0, 1fr)); display: grid; }
}
@media (max-width: 680px) {
	.br-topbar-inner { align-items: flex-start; flex-direction: column; gap: 10px; }
	.br-nav { width: 100%; overflow-x: auto; padding-bottom: 2px; }
	.br-section-head { align-items: flex-start; flex-direction: column; }
	.br-filter-row { justify-content: flex-start; }
	.br-article-card.featured,
	.br-plain-card,
	.br-news-item,
	.br-nextprev { grid-template-columns: 1fr; }
	.br-card-side { border-left: 0; border-top: 1px solid var(--br-line-soft); }
	.br-compact-thumb { display: none; }
	.br-sidebar { grid-template-columns: 1fr; }
	.featured .br-card-title,
	.br-card-title { font-size: 20px; }
	.br-read-title { font-size: 26px; }
	.br-read-panel { padding: 22px; }
}