/* ============================================================
   Clash百科 · 博客系统样式(列表页 + 文章页)
   铜版百科全书风:直角、1px 墨线、朱砂批注;无圆角、无投影、无渐变
   ============================================================ */

/* ---------------- 列表页 · 卷首 ---------------- */
.blog-hero {
  border-bottom: 1px solid var(--ink);
}

.blog-kicker {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  margin: 0 0 1.2rem;
  font-size: 0.8rem;
  letter-spacing: 0.22em;
  color: var(--text-muted);
}

.blog-kicker .k-no {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--cinnabar);
}

.blog-kicker::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--ink);
}

.blog-title {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: 0.05em;
  color: var(--text);
}

.blog-lead {
  max-width: 44em;
  margin: 0;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--text-muted);
}

/* ---------------- 列表页 · 分类筛选 ---------------- */
.tag-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 2.2rem;
}

.tag-btn {
  appearance: none;
  -webkit-appearance: none;
  margin: 0;
  padding: 0.55rem 1.3rem;
  border: 1px solid var(--ink);
  border-radius: 0;
  background: var(--paper);
  color: var(--text);
  font-family: var(--font-display);
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.tag-btn:hover {
  background: var(--panel);
}

.tag-btn.on {
  background: var(--cinnabar);
  border-color: var(--cinnabar);
  color: var(--paper);
}

.tag-btn.on:hover {
  background: var(--cinnabar-deep);
  border-color: var(--cinnabar-deep);
}

.tag-count {
  margin-left: auto;
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  color: var(--text-muted);
}

@media (max-width: 640px) {
  .tag-count {
    width: 100%;
    margin: 0.4rem 0 0;
  }
}

/* ---------------- 文章卡(列表页与延伸阅读共用) ---------------- */
.post-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.4rem;
}

@media (max-width: 760px) {
  .post-grid {
    grid-template-columns: 1fr;
  }
}

.post-card {
  display: flex;
  flex-direction: column;
  padding: 1.5rem 1.6rem 1.4rem;
  border: 1px solid var(--ink);
  border-radius: 0;
  background: var(--panel);
  color: var(--text);
  text-decoration: none;
  transition: background-color 0.15s ease;
}

.post-card:hover {
  background: var(--plate-paper);
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.9rem;
  margin-bottom: 0.85rem;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.post-tag {
  display: inline-block;
  padding: 0.1rem 0.55rem;
  border: 1px solid var(--cinnabar);
  color: var(--cinnabar);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
}

.post-title {
  margin-bottom: 0.7rem;
  font-family: var(--font-display);
  font-size: 1.26rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--text);
}

.post-card:hover .post-title {
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: var(--cinnabar);
}

.post-summary {
  flex: 1;
  margin: 0 0 1.1rem;
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--text-muted);
}

.post-more {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--cinnabar);
}

.post-empty {
  margin: 0;
  padding: 2.2rem 1.6rem;
  border: 1px solid var(--ink);
  background: var(--panel);
  text-align: center;
  color: var(--text-muted);
}

.post-empty[hidden] {
  display: none;
}

/* ---------------- 文章页 · 面包屑 ---------------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
  margin: 0 0 2.2rem;
  padding-top: 2rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.crumbs a {
  color: var(--text-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.crumbs a:hover {
  color: var(--cinnabar);
  border-bottom-color: var(--cinnabar);
}

.crumbs .sep {
  color: var(--ink);
}

.crumbs > span:last-child {
  color: var(--text);
}

/* ---------------- 文章页 · 文头 ---------------- */
.post-hero {
  margin-bottom: 2.4rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--ink);
}

.post-hero .post-meta {
  margin-bottom: 1rem;
  font-size: 0.85rem;
}

.post-hero h1 {
  margin: 0 0 1.1rem;
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 4.5vw, 2.8rem);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: 0.02em;
  color: var(--text);
}

.post-hero .lead {
  max-width: 44em;
  margin: 0;
  font-size: 1.02rem;
  line-height: 1.9;
  color: var(--text-muted);
}

/* ---------------- 文章页 · 正文排版 ---------------- */
.prose {
  font-size: 1rem;
  line-height: 1.95;
  color: var(--text);
}

.prose p {
  margin: 0 0 1.4rem;
}

.prose h2 {
  margin: 2.8rem 0 1.2rem;
  padding-top: 1.8rem;
  border-top: 1px solid var(--ink);
  font-family: var(--font-display);
  font-size: 1.55rem;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.02em;
  scroll-margin-top: calc(var(--header-h) + 1.2rem);
}

.prose h2::before {
  content: "§";
  margin-right: 0.5em;
  color: var(--cinnabar);
}

.prose h3 {
  margin: 2.1rem 0 0.9rem;
  font-family: var(--font-display);
  font-size: 1.18rem;
  font-weight: 700;
  line-height: 1.5;
  scroll-margin-top: calc(var(--header-h) + 1.2rem);
}

.prose ul,
.prose ol {
  margin: 0 0 1.4rem;
  padding-left: 1.7em;
}

.prose li {
  margin-bottom: 0.5rem;
}

.prose li::marker {
  color: var(--cinnabar);
}

.prose blockquote {
  margin: 0 0 1.4rem;
  padding: 0.1rem 0 0.1rem 1.2rem;
  border-left: 3px solid var(--cinnabar);
  color: var(--text-muted);
}

.prose blockquote p:last-child {
  margin-bottom: 0;
}

.prose a {
  color: var(--cinnabar-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.prose a:hover {
  color: var(--cinnabar);
}

.prose code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  padding: 0.08em 0.35em;
  background: var(--panel-deep);
}

.prose pre {
  margin: 0 0 1.4rem;
  padding: 1.1rem 1.25rem;
  border: 1px solid var(--ink);
  background: var(--panel-deep);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.75;
}

.prose pre code {
  padding: 0;
  background: none;
  font-size: inherit;
}

.prose img {
  max-width: 100%;
  height: auto;
  border: 1px solid var(--ink);
}

.prose hr {
  margin: 2.4rem 0;
  border: 0;
  border-top: 1px solid var(--ink);
}

/* ---------------- 文章页 · 卷末下载引导卡 ---------------- */
.dl-cta {
  position: relative;
  margin: 3rem 0 0;
  padding: 2.1rem 2.2rem;
  border: 1px solid var(--ink);
  background: var(--panel);
}

.dl-cta::before {
  content: "";
  position: absolute;
  top: 6px;
  right: 6px;
  bottom: 6px;
  left: 6px;
  border: 1px solid var(--ink);
  pointer-events: none;
}

.dl-cta-kicker {
  margin-bottom: 0.8rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--cinnabar);
}

.dl-cta-title {
  margin-bottom: 0.7rem;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text);
}

.dl-cta-desc {
  max-width: 42em;
  margin: 0 0 1.5rem;
  line-height: 1.85;
  color: var(--text-muted);
}

.dl-cta .btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

/* ---------------- 文章页 · 延伸阅读(related.js 渲染) ---------------- */
#related-posts {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--ink);
}

#related-posts:empty {
  display: none;
}

.rel-head {
  display: flex;
  align-items: baseline;
  gap: 0.8rem;
  margin-bottom: 1.6rem;
}

.rel-no {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--cinnabar);
}

.rel-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--text);
}

#related-posts .post-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

@media (max-width: 960px) {
  #related-posts .post-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------------- 文章页 · 上一篇 / 下一篇(related.js 渲染) ---------------- */
#post-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.4rem;
  margin-top: 2.6rem;
}

#post-nav:empty {
  display: none;
}

@media (max-width: 700px) {
  #post-nav {
    grid-template-columns: 1fr;
  }
}

.pn-link {
  display: block;
  padding: 1.2rem 1.4rem;
  border: 1px solid var(--ink);
  border-radius: 0;
  background: var(--panel);
  color: var(--text);
  text-decoration: none;
  transition: background-color 0.15s ease;
}

.pn-link:hover {
  background: var(--plate-paper);
}

.pn-link:only-child {
  grid-column: 1 / -1;
}

.pn-dir {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--cinnabar);
}

.pn-title {
  display: block;
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.55;
  color: var(--text);
}

.pn-next {
  text-align: right;
}

/* ---------------- 文章页 · 右下角常驻下载引导 ---------------- */
.dl-fab {
  position: fixed;
  right: 1.2rem;
  bottom: 1.2rem;
  z-index: var(--z-fab);
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.7rem 1.15rem;
  border: 1px solid var(--ink);
  border-radius: 0;
  background: var(--panel);
  color: var(--text);
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-decoration: none;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.dl-fab:hover {
  background: var(--cinnabar);
  border-color: var(--cinnabar);
  color: var(--paper);
}

.dl-fab svg {
  width: 18px;
  height: 18px;
  flex: none;
}

.dl-fab .fab-stroke {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: square;
}

/* ---------------- 可访问性 · 焦点与减动效 ---------------- */
.tag-btn:focus-visible,
.post-card:focus-visible,
.pn-link:focus-visible,
.dl-fab:focus-visible,
.crumbs a:focus-visible {
  outline: 2px solid var(--cinnabar);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .tag-btn,
  .post-card,
  .pn-link,
  .dl-fab {
    transition: none;
  }
}