:root {
  --bg-color: #f7f2e8; /* Warm book page cream/rice-yellow */
  --text-color: #332f29; /* Soft charcoal-brown for high readability, low contrast strain */
  --text-muted: #7a7265; /* Elegant warm gray for meta info */
  --border-color: #e8dfd0; /* Soft sand borders */
  --accent-color: #8c765c; /* Warm bronze accent for quotes and highlights */
  --code-bg: #ede4d3; /* Darker cream background for code blocks */
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family:
    "Noto Serif SC", "Noto Serif", Georgia, "Source Han Serif SC", "Source Han Serif", serif;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

html,
body {
  overflow: hidden;
  height: 100%;
}

#vecto-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  display: block;
  z-index: 1;
}

::selection {
  background: var(--text-color);
  color: var(--bg-color);
}

a {
  color: var(--text-color);
  text-decoration: none;
  transition:
    color 0.2s ease,
    border-color 0.2s ease;
  border-bottom: 1px solid transparent;
}

a:hover {
  color: var(--accent-color);
  border-bottom-color: var(--accent-color);
}

/* Reading Progress Bar */
.reading-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background-color: var(--accent-color);
  width: 0%;
  z-index: 10000;
  transition: width 0.1s ease-out;
}

.zen-header {
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 4rem;
  padding: 1.5rem 0;
  width: 100%;
}

.header-container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-sizing: border-box;
}

.zen-header h1 {
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: 1px;
  margin: 0;
  font-family: "Noto Sans SC", sans-serif;
  color: var(--text-color);
}

.zen-header a {
  border-bottom: none;
}

/* Search Box */
.zen-search-wrapper {
  position: relative;
  font-family: "Noto Sans SC", sans-serif;
}

#zen-search-input {
  background-color: var(--code-bg);
  border: 1px solid var(--border-color);
  color: var(--text-color);
  padding: 0.4rem 0.8rem;
  border-radius: 4px;
  font-size: 0.8rem;
  width: 140px;
  transition:
    width 0.3s ease,
    border-color 0.2s ease;
  outline: none;
}

#zen-search-input:focus {
  width: 200px;
  border-color: var(--accent-color);
}

.zen-search-results-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  width: 280px;
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  margin-top: 0.5rem;
  max-height: 300px;
  overflow-y: auto;
  z-index: 1000;
  display: none;
}

.zen-search-item {
  padding: 0.6rem 0.8rem;
  border-bottom: 1px solid var(--border-color);
  display: block;
  transition: background-color 0.2s ease;
}

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

.zen-search-item:hover {
  background-color: var(--code-bg);
}

.zen-search-item-title {
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--text-color);
  margin-bottom: 0.2rem;
  line-height: 1.3;
}

.zen-search-item-meta {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.zen-search-no-results {
  padding: 0.8rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: center;
}

/* Floating TOC Toggle Button */
.zen-toc-toggle-floating {
  position: fixed;
  right: 1.5rem;
  top: 5rem;
  font-family: "Noto Sans SC", sans-serif;
  font-size: 0.75rem;
  background-color: var(--code-bg);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  cursor: pointer;
  display: none;
  z-index: 999;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
}

.zen-toc-toggle-floating:hover {
  color: var(--text-color);
  border-color: var(--accent-color);
}

.zen-toc-toggle-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.75rem;
  cursor: pointer;
  padding: 0.2rem 0.4rem;
  border-radius: 3px;
  transition:
    color 0.2s ease,
    background-color 0.2s ease;
}

.zen-toc-toggle-btn:hover {
  color: var(--text-color);
  background-color: var(--code-bg);
}

.zen-nav a:hover {
  color: var(--text-color);
}

.zen-container {
  max-width: 680px;
  margin: 0 auto;
  padding: 0 2rem;
  flex: 1;
  width: 100%;
  box-sizing: border-box;
}

.zen-main-column {
  min-width: 0;
  width: 100%;
  box-sizing: border-box;
}

/* Two-column layout when TOC is present on desktop */
@media (min-width: 1100px) {
  .zen-container.has-toc {
    max-width: 960px;
    display: grid;
    grid-template-columns: 680px 220px;
    gap: 60px;
  }

  .zen-container.has-toc.toc-collapsed {
    grid-template-columns: 1fr;
    max-width: 780px;
  }

  .zen-container.has-toc.toc-collapsed .zen-toc-container {
    display: none;
  }

  .zen-toc-container {
    position: sticky;
    top: 4rem;
    align-self: start;
    max-height: calc(100vh - 8rem);
    overflow-y: auto;
    border-left: 1px solid var(--border-color);
    padding-left: 1.5rem;
    font-family: "Noto Sans SC", sans-serif;
    font-size: 0.85rem;
    line-height: 1.6;
  }

  .zen-toc-title {
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.8rem;
  }

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

  .zen-toc-list li {
    margin-bottom: 0.6rem;
  }

  .zen-toc-list a {
    color: var(--text-muted);
    border-bottom: none;
  }

  .zen-toc-list a:hover {
    color: var(--text-color);
  }

  .zen-toc-list ul {
    list-style: none;
    padding-left: 1rem;
    margin-top: 0.4rem;
  }
}

@media (max-width: 1099px) {
  .zen-toc-container {
    display: none; /* Hide desktop sidebar TOC on mobile */
  }
}

/* Mobile collapsible TOC */
.mobile-toc {
  background: var(--code-bg);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 1rem;
  margin-bottom: 2.5rem;
  font-family: "Noto Sans SC", sans-serif;
  font-size: 0.9rem;
}

.mobile-toc summary {
  font-weight: bold;
  cursor: pointer;
  outline: none;
  user-select: none;
  color: var(--text-color);
}

.mobile-toc ul {
  list-style: none;
  padding-left: 1.2rem;
  margin: 0.8rem 0 0 0;
}

.mobile-toc li {
  margin-bottom: 0.5rem;
}

.mobile-toc a {
  color: var(--text-muted);
  border-bottom: none;
}

.mobile-toc a:hover {
  color: var(--text-color);
}

@media (min-width: 1100px) {
  .mobile-toc {
    display: none; /* Hide mobile TOC on desktop */
  }
}

/* Post list */
.zen-post-list {
  display: flex;
  flex-direction: column;
  gap: 4rem;
}

.zen-post-item h2 {
  font-size: 1.6rem;
  font-weight: 400;
  margin: 0 0 0.5rem 0;
  line-height: 1.4;
}

.zen-post-item h2 a {
  border-bottom: none;
}

.zen-post-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  font-family: "Noto Sans SC", sans-serif;
}

.zen-post-summary {
  font-size: 0.95rem;
  color: var(--text-color);
  line-height: 1.8;
}

.read-more-link {
  font-size: 0.85rem;
  font-family: "Noto Sans SC", sans-serif;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 2px;
}

/* Single Post */
.zen-single-post header {
  margin-bottom: 3rem;
  text-align: center;
}

.zen-single-post h1 {
  font-size: 2.2rem;
  font-weight: 300;
  color: var(--text-color);
  margin-bottom: 1rem;
  line-height: 1.3;
}

.zen-article-body {
  font-size: 1.05rem;
  line-height: 1.9;
}

.zen-article-body h2,
.zen-article-body h3,
.zen-article-body h4 {
  font-weight: 400;
  color: var(--text-color);
  margin-top: 3rem;
  margin-bottom: 1rem;
  font-family: "Noto Sans SC", sans-serif;
}

/* Make links inside the article body stand out */
.zen-article-body a {
  color: var(--accent-color);
  border-bottom: 1px dashed var(--accent-color);
  font-weight: 500;
  transition: all 0.2s ease;
}

.zen-article-body a:hover {
  color: var(--text-color);
  border-bottom: 1px solid var(--text-color);
}

.zen-article-body h2 {
  font-size: 1.5rem;
  border-bottom: 1px dashed var(--border-color);
  padding-bottom: 0.3rem;
}

.zen-article-body h3 {
  font-size: 1.25rem;
}

.zen-article-body p {
  margin-top: 0;
  margin-bottom: 1.6rem;
}

.zen-article-body img {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
  margin: 2.5rem 0;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.zen-article-body pre {
  background: var(--code-bg);
  padding: 1.5rem;
  border-radius: 6px;
  overflow-x: auto;
  font-size: 0.9rem;
  line-height: 1.6;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  margin: 2rem 0;
  border: 1px solid var(--border-color);
}

.zen-article-body code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  background: var(--code-bg);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-size: 0.85em;
}

.zen-article-body pre code {
  background: transparent;
  padding: 0;
  border-radius: 0;
  font-size: inherit;
}

.zen-article-body blockquote {
  margin: 2.5rem 0;
  padding: 0.5rem 0 0.5rem 1.5rem;
  border-left: 3px solid var(--accent-color);
  color: var(--text-muted);
  font-style: italic;
}

.zen-article-body blockquote p:last-child {
  margin-bottom: 0;
}

.zen-article-body ul,
.zen-article-body ol {
  margin-bottom: 1.6rem;
  padding-left: 2rem;
}

.zen-article-body li {
  margin-bottom: 0.5rem;
}

.zen-article-body hr {
  border: none;
  border-top: 1px dashed var(--border-color);
  margin: 3rem 0;
}

/* Pagination / Post navigation at bottom */
.zen-post-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px dashed var(--border-color);
  font-family: "Noto Sans SC", sans-serif;
  font-size: 0.9rem;
  gap: 2rem;
}

.zen-post-nav a {
  color: var(--text-muted);
  border-bottom: none;
}

.zen-post-nav a:hover {
  color: var(--text-color);
}

.zen-post-nav .nav-prev,
.zen-post-nav .nav-next {
  flex: 1;
}

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

/* Footer */
.zen-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 3rem 0;
  font-family: "Noto Sans SC", sans-serif;
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 1px;
  border-top: 1px solid var(--border-color);
  margin-top: 6rem;
  max-width: 960px;
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  box-sizing: border-box;
  padding-left: 2rem;
  padding-right: 2rem;
}

.zen-footer-left {
  text-align: left;
}

.zen-footer-right {
  display: flex;
  align-items: center;
}

.zen-footer-right a {
  color: var(--text-muted);
  border-bottom: none;
  display: flex;
  align-items: center;
  transition: color 0.2s ease;
}

.zen-footer-right a:hover {
  color: var(--text-color);
}

.back-to-list {
  margin-top: 4rem;
  text-align: left;
  border-top: 1px solid var(--border-color);
  padding-top: 2rem;
}

.back-to-list a {
  font-size: 0.9rem;
  font-family: "Noto Sans SC", sans-serif;
  color: var(--text-muted);
  border-bottom: none;
}

.back-to-list a:hover {
  color: var(--text-color);
}

/* Fade in animation */
body {
  animation: fadeIn 1s ease-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Table styles matching Zen aesthetics */
.zen-article-body table {
  width: 100%;
  margin: 1.5rem 0;
  border-collapse: collapse;
  font-size: 0.9rem;
  line-height: 1.5;
}
.zen-article-body th {
  background-color: var(--code-bg);
  border-bottom: 2px solid var(--border-color);
  padding: 10px 12px;
  font-weight: 600;
  text-align: left;
  color: var(--text-color);
}
.zen-article-body td {
  border-bottom: 1px solid var(--border-color);
  padding: 10px 12px;
  color: var(--text-color);
}
.zen-article-body tr:hover td {
  background-color: var(--code-bg);
}

/* Footnotes styling (Standard markdown and Zola specific) */
.zen-article-body .footnotes,
.zen-article-body .footnote-definition {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
}
.zen-article-body .footnotes {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}
.zen-article-body .footnotes ol {
  padding-left: 20px;
}
.zen-article-body .footnotes li {
  margin-bottom: 0.5rem;
}
.zen-article-body .footnote-definition {
  margin-top: 0.5rem;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}
.zen-article-body .footnote-definition p {
  margin: 0;
  display: inline;
}
.zen-article-body .footnote-definition-label,
.zen-article-body .footnote-definition sup {
  font-weight: bold;
  color: var(--text-muted);
}
/* Divider line before first footnote definition in Zola */
.zen-article-body .footnote-definition:first-of-type {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}
.zen-article-body sup a,
.zen-article-body .footnote-reference a {
  text-decoration: none;
  font-weight: bold;
  color: var(--text-muted);
  padding: 0 2px;
}
.zen-article-body sup a:hover,
.zen-article-body .footnote-reference a:hover {
  color: var(--accent-color);
}

/* Task lists / Checkboxes styling */
.zen-article-body ul li input[type="checkbox"] {
  margin-right: 8px;
  vertical-align: middle;
}

/* Post list sorting bar */
.zen-sort-bar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  font-family: "Noto Sans SC", sans-serif;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: -1rem; /* Adjust space before the first post */
  border-bottom: 1px dashed var(--border-color);
  padding-bottom: 0.8rem;
}

.zen-sort-label {
  margin-right: 0.5rem;
}

.zen-sort-select {
  background-color: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-color);
  font-family: inherit;
  font-size: 0.8rem;
  padding: 0.3rem 1.6rem 0.3rem 0.6rem;
  border-radius: 4px;
  cursor: pointer;
  outline: none;
  appearance: none;
  -webkit-appearance: none;
  background-image: url('data:image/svg+xml;utf8,<svg fill="%238c765c" height="18" viewBox="0 0 24 24" width="18" xmlns="http://www.w3.org/2000/svg"><path d="M7 10l5 5 5-5z"/></svg>');
  background-repeat: no-repeat;
  background-position: right 0.2rem center;
  transition:
    border-color 0.2s ease,
    box-shadow 0.2s ease;
}

.zen-sort-select:hover,
.zen-sort-select:focus {
  border-color: var(--accent-color);
}