/* Components — reusable UI pieces
   Header, footer, pagination, tabs, TOC, alerts, tables, etc.
   两站共用的规则在 shared.css，本文件只保留写作子站专属部分。 */

/* Header — 通用结构见 shared.css，此处只保留子站专属排版 */
.site-title {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-4);
  font-weight: 200;
  font-size: 1.4rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-bottom: none;
}

/* .site-title:hover / .site-header nav 见 shared.css；
   .site-mark 无模板引用，随主站专属死代码一并删除 */

.site-header nav a {
  display: inline-flex;
  align-items: baseline;
  gap: var(--sp-3);
  font-size: 0.9rem;
  line-height: 1.5;
  font-weight: 400;
  letter-spacing: 0.05em;
  color: var(--grey-3);
  border-bottom: none;
}

.nav-index {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0;
}

/* .site-header nav a:hover 见 shared.css */

/* Page header (shared by posts, gene pages) */
.page-header {
  margin-top: var(--sp-10);
  margin-bottom: var(--sp-8);
}

.page-header + .lead {
  margin-bottom: var(--sp-9);
}

/* Sections / About / Contact grid 见 shared.css（写作子站无对应模板引用） */

/* Post list */
.post-list {
  list-style: none;
}

.post-list li {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: var(--sp-6);
  align-items: baseline;
  padding: var(--sp-6) 0;
}

.post-list .post-date {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--grey-3);
  letter-spacing: 0.04em;
  line-height: 31px;
}

.post-list .post-title {
  font-weight: 300;
  font-size: 1.15rem;
}

/* Post meta & tags */
.post-tags {
  display: flex;
  gap: var(--sp-3);
  flex-wrap: wrap;
}

.post-tag {
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--grey-3);
  padding: 2px 8px;
  border: 1px solid var(--grey-2);
  transition: color 0.2s, border-color 0.2s;
}

.post-tag:hover {
  color: var(--ink);
  border-color: var(--ink);
}

/* GitHub Alerts 见 shared.css */

/* Tables */
.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--sp-7);
  font-size: 0.9rem;
}

.post-content thead {
  border-bottom: 2px solid var(--ink);
}

.post-content th {
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-align: left;
  padding: var(--sp-4) var(--sp-5);
  color: var(--ink);
}

.post-content td {
  padding: var(--sp-4) var(--sp-5);
  border-bottom: 1px solid var(--grey-1);
  vertical-align: top;
}

.post-content tbody tr:last-child td {
  border-bottom: 2px solid var(--ink);
}

/* Table of Contents */
.toc {
  padding: var(--sp-5) 0;
}

.toc-title {
  margin-bottom: var(--sp-5);
  border-bottom: 1px solid var(--grey-2);
  padding-bottom: var(--sp-4);
}

.toc-list {
  list-style: none;
  counter-reset: toc;
  padding: 0;
  margin: 0;
}

.toc-item {
  counter-increment: toc;
  padding: var(--sp-3) 0;
  border-bottom: 1px solid var(--grey-1);
  font-size: 0.8rem;
  line-height: 1.5;
}

.toc-item:last-child {
  border-bottom: none;
}

.toc-item::before {
  content: counter(toc, decimal-leading-zero);
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--grey-3);
  margin-right: var(--sp-4);
  letter-spacing: 0.04em;
}

.toc-sub {
  padding-left: var(--sp-6);
  font-size: 0.75rem;
}

.toc-sub::before {
  content: "—";
  font-size: 0.65rem;
}

.toc-item a {
  color: var(--grey-3);
  border-bottom: none;
  border-left: 2px solid transparent;
  padding-left: var(--sp-4);
  display: block;
  transition: opacity 0.3s ease;
}

.toc-item a:hover {
  color: var(--ink);
  border-bottom: none;
}

.toc-item a.active {
  color: var(--ink);
  font-weight: 400;
  border-left: 2px solid var(--ink);
  padding-left: var(--sp-4);
}

/* Non-hover: dim entire non-active items (link + counter), keep only the active one clear */
.post-sidebar .toc-item,
.post-sidebar .toc-item::before,
.post-sidebar .toc-title {
  transition: opacity 0.35s ease;
}

.post-sidebar:not(:hover) .toc-item:not(:has(a.active)),
.post-sidebar:not(:hover) .toc-title {
  opacity: 0.12;
}

.post-sidebar:not(:hover) .toc-item:has(a.active) {
  opacity: 1;
}

/* Footnote tooltip */
.footnote-tooltip {
  position: absolute;
  z-index: 100;
  max-width: 360px;
  padding: var(--sp-4) var(--sp-5);
  background: var(--paper);
  border: 1px solid var(--grey-2);
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--ink);
  box-shadow: none;
}

.footnote-tooltip p {
  margin: 0;
  max-width: none;
}

.footnote-ref {
  cursor: help;
  font-weight: 600;
  border-bottom: 1px dashed var(--grey-3);
}

/* Tabs */
.tab-group {
  margin-bottom: var(--sp-7);
  border: 1px solid var(--grey-2);
}

.tab-list {
  display: flex;
  border-bottom: 1px solid var(--grey-2);
  background: var(--grey-1);
}

.tab-btn {
  padding: var(--sp-4) var(--sp-6);
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--grey-3);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
}

.tab-btn:hover {
  color: var(--ink);
}

.tab-btn.active {
  color: var(--ink);
  font-weight: 600;
  border-bottom-color: var(--ink);
  background: var(--paper);
}

.tab-panel {
  display: none;
  padding: var(--sp-5) var(--sp-6);
}

.tab-panel.active {
  display: block;
}

.tab-panel > :last-child {
  margin-bottom: 0;
}

/* Lighter code block styles inside tab panels */
.tab-panel pre,
.tab-panel pre[class*="language-"] {
  background: var(--grey-1);
  padding: var(--sp-5);
  border: none;
  border-left: 2px solid var(--grey-2);
  margin-bottom: 0;
}

/* Mermaid diagrams */
.mermaid {
  margin-bottom: var(--sp-7);
  overflow-x: auto;
  text-align: center;
}

.mermaid svg {
  max-width: 100%;
  height: auto;
}

/* Gene / Tags page */
.gene-count {
  margin-bottom: var(--sp-8);
}

.gene-header {
  margin-bottom: var(--sp-8);
}

/* Gene title as tab */
.gene-title {
  font-weight: 200;
  font-size: min(3.2vw, 5.2vh);
  margin-top: var(--sp-10);
  margin-bottom: var(--sp-4);
}

.gene-title-btn {
  cursor: pointer;
  transition: color 0.2s, opacity 0.2s;
  color: var(--grey-2);
}

.gene-title-btn:hover {
  color: var(--grey-3);
}

.gene-title-btn.active {
  color: var(--ink);
}

.gene-title-sep {
  color: var(--grey-2);
  margin: 0 var(--sp-3);
  font-weight: 200;
}

.gene-view {
  display: none;
}

.gene-view.active {
  display: block;
}

.tag-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--sp-5);
}

.tag-card {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: var(--sp-5) var(--sp-6);
  border: 1px solid var(--grey-2);
  transition: border-color 0.2s;
  border-bottom: none;
}

.tag-card:hover {
  border-color: var(--ink);
  border-bottom: none;
}

.tag-name {
  font-size: 1rem;
  font-weight: 400;
}

.tag-name-year {
  font-family: var(--mono);
  letter-spacing: 0.04em;
}

.tag-count {
  flex-shrink: 0;
  margin-left: var(--sp-5);
}

/* Footer — masthead / colophon style
   .site-footer / .footer-masthead / .footer-tagline 见 shared.css；
   masthead-top 与 footer-domain 为子站专属结构，保留在下方 */
.footer-masthead-top {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-7);
  align-items: start;
  margin-bottom: var(--sp-9);
}

.footer-domain {
  font-family: var(--sans-display);
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 200;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--ink);
  border-bottom: none;
}

.footer-domain:hover {
  color: var(--grey-3);
  border-bottom: none;
}

/* .footer-tagline 见 shared.css */

.footer-masthead-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--sp-3) var(--sp-7);
  border-top: 1px solid var(--grey-2);
  padding-top: var(--sp-4);
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--grey-3);
}

.footer-credit {
  color: var(--grey-3);
}

.footer-link {
  color: inherit;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}

.footer-link:hover {
  border-bottom-color: var(--grey-3);
}

@media (max-width: 768px) {
  .footer-masthead-top {
    grid-template-columns: 1fr;
    gap: var(--sp-4);
    margin-bottom: var(--sp-7);
  }

  .footer-tagline {
    justify-self: start;
    text-align: left;
  }

  .footer-masthead-bottom {
    gap: var(--sp-3) var(--sp-5);
  }
}

/* Back to top */
.back-to-top {
  position: fixed;
  right: var(--sp-7);
  bottom: var(--sp-7);
  z-index: 90;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  color: var(--grey-3);
  background: var(--paper);
  border: 1px solid var(--grey-2);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.25s, transform 0.25s, visibility 0.25s, color 0.2s, border-color 0.2s;
}

.back-to-top svg {
  display: block;
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  color: var(--ink);
  border-color: var(--ink);
}

@media (prefers-reduced-motion: reduce) {
  .back-to-top {
    transition: none;
  }
}

/* Pagination */
.pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-9) 0 var(--sp-8);
  border-top: 1px solid var(--grey-2);
  margin-top: var(--sp-8);
}

.pagination-link {
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  min-width: 80px;
}

.pagination-link.is-disabled {
  color: var(--grey-2);
  pointer-events: none;
}

.pagination-selector {
  position: relative;
}

.pagination-selector-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  background: none;
  border: 1px solid var(--grey-2);
  padding: var(--sp-3) var(--sp-4);
  cursor: pointer;
  color: var(--grey-3);
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  transition: border-color 0.2s, color 0.2s;
}

.pagination-selector-btn:hover {
  border-color: var(--ink);
  color: var(--ink);
}

.pagination-selector-btn svg {
  flex-shrink: 0;
}

.pagination-popup {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--paper);
  border: 1px solid var(--grey-2);
  padding: var(--sp-5);
  z-index: 50;
  min-width: 220px;
}

.pagination-backdrop {
  position: fixed;
  inset: 0;
  z-index: 49;
}

.pagination-popup-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 4px;
}

.pagination-popup-page {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--grey-3);
  border-bottom: none;
  transition: color 0.15s, background 0.15s;
}

.pagination-popup-page:hover {
  color: var(--ink);
  background: var(--grey-1);
  border-bottom: none;
}

.pagination-popup-page.is-current {
  color: var(--paper);
  background: var(--ink);
  font-weight: 600;
}

/* Responsive */
@media (max-width: 768px) {
  .post-list li {
    grid-template-columns: 1fr;
    gap: var(--sp-3);
  }

  .post-list .post-category {
    display: none;
  }

  .site-header nav {
    gap: var(--sp-5);
  }
}