/* ============================================================
   博客系统专属样式 —— Clash知识库(深夜药铺问诊处)
   仅引用 :root 设计令牌,直角、细线、无发光无投影
   ============================================================ */

/* ---------- 列表页页头 ---------- */

.blog-hero {
  padding-top: calc(var(--head-h) + 3.5rem);
  padding-bottom: 2.5rem;
}

.blog-hero h1 {
  margin-top: 0.5rem;
}

.blog-hero .lead {
  max-width: 44em;
}

/* ---------- 标签筛选 ---------- */

.tag-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.tag-btn {
  appearance: none;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: 0.875rem;
  line-height: 1;
  padding: 0.6rem 1.1rem;
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease, background-color 0.15s ease;
}

.tag-btn:hover {
  color: var(--text);
  border-color: var(--border-strong);
}

.tag-btn:focus-visible {
  outline: 1px solid var(--accent);
  outline-offset: 2px;
}

.tag-btn.is-active {
  color: var(--paper);
  background: var(--accent);
  border-color: var(--accent);
}

/* ---------- 文章卡片 ---------- */

.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.post-card {
  background: var(--bg-panel);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: background-color 0.15s ease;
}

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

.post-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.post-tag {
  display: inline-block;
  border: 1px solid var(--accent-dark);
  color: var(--accent);
  padding: 0.2rem 0.55rem;
  font-family: var(--font-body);
  font-size: 0.75rem;
  line-height: 1.4;
}

.post-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.15rem;
  line-height: 1.6;
  letter-spacing: 0.02em;
}

.post-card h3 a {
  color: var(--text);
  text-decoration: none;
}

.post-card h3 a:hover {
  color: var(--accent);
}

.post-card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.9;
  flex: 1;
}

.post-more {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  text-decoration: none;
  margin-top: 0.25rem;
}

.post-more:hover {
  color: var(--accent-dark);
}

.post-empty {
  margin: 2rem 0 0;
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.9;
}

/* ---------- 面包屑(与页头之间留呼吸空间) ---------- */

.breadcrumb {
  margin-top: calc(var(--head-h) + 1.5rem);
  padding-top: 0;
  padding-bottom: 0.5rem;
}

.breadcrumb ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.breadcrumb li + li::before {
  content: "/";
  color: var(--border-strong);
}

.breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--accent);
}

.breadcrumb [aria-current="page"] {
  color: var(--text);
}

/* ---------- 文章页头 ---------- */

.post-hero {
  padding-top: 1.5rem;
  padding-bottom: 2.5rem;
}

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

.post-hero h1 {
  margin: 0 0 1rem;
  max-width: 22em;
}

.post-hero .lead {
  max-width: 44em;
  color: var(--text-muted);
}

/* ---------- 文章正文微调 ---------- */

.post-body {
  max-width: 46em;
}

/* ---------- 文末下载引导卡 ---------- */

.cta-card {
  background: var(--paper);
  border: 1px solid var(--paper-back);
  border-radius: var(--radius);
  padding: 2rem;
  margin: 3rem 0;
}

.cta-card h2 {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  color: var(--ink);
  font-size: 1.4rem;
  letter-spacing: 0.02em;
}

.cta-card p {
  margin: 0 0 1.25rem;
  color: var(--ink-soft);
  line-height: 1.9;
  font-size: 0.95rem;
}

.cta-card .actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ---------- 延伸阅读 ---------- */

.related-title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  letter-spacing: 0.02em;
  margin: 3rem 0 1.25rem;
  padding-left: 0.9rem;
  border-left: 3px solid var(--accent);
}

.related-grid {
  margin-bottom: 2rem;
}

/* ---------- 上一篇 / 下一篇 ---------- */

#post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  margin: 2rem 0 3rem;
}

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

.post-nav-link {
  background: var(--bg-panel);
  padding: 1.25rem 1.5rem;
  text-decoration: none;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  transition: background-color 0.15s ease;
}

.post-nav-link:hover {
  background: var(--bg);
}

.post-nav-link.is-next {
  text-align: right;
}

.post-nav-link:only-child.is-next {
  grid-column: 2;
}

.post-nav-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
}

.post-nav-title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text);
  letter-spacing: 0.02em;
}

/* ---------- 文末下载引导弹窗 ---------- */

html.dl-modal-open {
  overflow: hidden;
}

.dl-modal {
  position: fixed;
  inset: 0;
  z-index: 90;
  background: rgba(20, 13, 8, 0.72);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--gutter);
  opacity: 0;
  transition: opacity 0.2s ease;
}

.dl-modal.is-open {
  opacity: 1;
}

.dl-modal-panel {
  position: relative;
  background: var(--paper);
  border: 1px solid var(--paper-back);
  border-radius: var(--radius);
  max-width: 26rem;
  width: 100%;
  padding: 2.25rem 2rem 2rem;
  transform: translateY(10px);
  transition: transform 0.2s ease;
}

.dl-modal.is-open .dl-modal-panel {
  transform: translateY(0);
}

.dl-modal-brand {
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--accent-dark);
}

.dl-modal-panel h2 {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: 1.5rem;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.dl-modal-desc {
  margin: 0 0 1.5rem;
  color: var(--ink-soft);
  font-size: 0.9rem;
  line-height: 1.9;
}

.dl-modal-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.dl-modal-close {
  position: absolute;
  top: 0;
  right: 0;
  width: 2.5rem;
  height: 2.5rem;
  appearance: none;
  background: transparent;
  border: none;
  border-left: 1px solid var(--paper-back);
  border-bottom: 1px solid var(--paper-back);
  border-radius: var(--radius);
  color: var(--ink-soft);
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
  transition: color 0.15s ease, background-color 0.15s ease;
}

.dl-modal-close:hover {
  color: var(--paper);
  background: var(--accent);
}

.dl-modal-close:focus-visible {
  outline: 1px solid var(--accent);
  outline-offset: -2px;
}

/* ---------- 响应式 ---------- */

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

  #post-nav {
    grid-template-columns: 1fr;
  }

  .post-nav-link.is-next {
    text-align: left;
  }

  .post-nav-link:only-child.is-next {
    grid-column: auto;
  }

  .cta-card {
    padding: 1.5rem;
  }

  .dl-modal-panel {
    padding: 2rem 1.5rem 1.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .dl-modal,
  .dl-modal-panel,
  .tag-btn,
  .post-card,
  .post-nav-link,
  .dl-modal-close {
    transition: none;
  }
}