:root {
  /* Light theme variables */
  --bg-primary: #ffffff;
  --bg-secondary: #f8f8f8;
  --text-primary: #000000;
  --text-secondary: #666666;
  --accent-color: #000000;
  --border-color: #e0e0e0;
  --border-color-secondary: #666666;
  --shadow-color: rgba(0, 0, 0, 0.05);
  --transition-duration: 0.2s;
  --transition-timing: cubic-bezier(0.4, 0, 0.2, 1);
  --container-width: 1000px;
  --header-height: 4rem;
  --theme-icon: url("data:image/svg+xml;charset=utf-8, <svg xmlns=\"http://www.w3.org/2000/svg\" width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"black\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" class=\"svg-icon lucide-sun\"><circle cx=\"12\" cy=\"12\" r=\"4\"></circle><path d=\"M12 2v2\"></path><path d=\"M12 20v2\"></path><path d=\"m4.93 4.93 1.41 1.41\"></path><path d=\"m17.66 17.66 1.41 1.41\"></path><path d=\"M2 12h2\"></path><path d=\"M20 12h2\"></path><path d=\"m6.34 17.66-1.41 1.41\"></path><path d=\"m19.07 4.93-1.41 1.41\"></path></svg>");
}

[data-theme="dark"] {
  --bg-primary: #000000;
  --bg-secondary: #1a1a1a;
  --text-primary: #ffffff;
  --text-secondary: #999999;
  --accent-color: #ffffff;
  --border-color: #333333;
  --border-color-secondary: #999999;
  --shadow-color: rgba(0, 0, 0, 0.3);
  --theme-icon: url("data:image/svg+xml;charset=utf-8,<svg xmlns=\"http://www.w3.org/2000/svg\" width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"%23ffffff\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M21 12.79A9 9 0 1 1 11.21 3 7 7 0 0 0 21 12.79z\"/></svg>");
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: background-color var(--transition-duration)
      var(--transition-timing),
    color var(--transition-duration) var(--transition-timing);
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 2rem;
}

.container h1 {
  margin-bottom: 2rem;
}

.navbar {
  height: var(--header-height);
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-content {
  max-width: var(--container-width);
  height: 100%;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9375rem;
  transition: color var(--transition-duration) var(--transition-timing);
  position: relative;
}

.nav-link:hover {
  color: var(--accent-color);
}

.theme-toggle {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  cursor: pointer;
  padding: 0.25rem;
  width: 48px;
  height: 24px;
  border-radius: 12px;
  position: relative;
  transition: all var(--transition-duration) var(--transition-timing);
  background-color: var(--bg-secondary);
}

.theme-toggle::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 2px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background-color: var(--accent-color);
  background-image: var(--theme-icon);
  background-size: 14px;
  background-position: center;
  background-repeat: no-repeat;
  transition: transform var(--transition-duration) var(--transition-timing);
}

.theme-toggle::after {
  display: none;
}

[data-theme="light"] .theme-toggle::before {
  transform: translateX(0px);
  background-image: url("data:image/svg+xml;charset=utf-8,<svg xmlns=\"http://www.w3.org/2000/svg\" width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"white\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><circle cx=\"12\" cy=\"12\" r=\"4\"></circle><path d=\"M12 2v2\"></path><path d=\"M12 20v2\"></path><path d=\"m4.93 4.93 1.41 1.41\"></path><path d=\"m17.66 17.66 1.41 1.41\"></path><path d=\"M2 12h2\"></path><path d=\"M20 12h2\"></path><path d=\"m6.34 17.66-1.41 1.41\"></path><path d=\"m19.07 4.93-1.41 1.41\"></path></svg>");
}

[data-theme="dark"] .theme-toggle::before {
  transform: translateX(24px);
  background-image: url("data:image/svg+xml;charset=utf-8,<svg xmlns=\"http://www.w3.org/2000/svg\" width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"black\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M12 3a6 6 0 0 0 9 9 9 9 0 1 1-9-9Z\"/></svg>");
}

.theme-toggle:hover {
  opacity: 1;
}

.home-page h1 {
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
  line-height: 1.2;
}

.home-page p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  max-width: 42rem;
}

.note-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  margin-bottom: 1rem;
  padding: 1.5rem 2rem;
  transition: all 0.3s ease;
}

.note-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--shadow-color);
  border-color: var(--accent-color);
}

.note-link {
  display: block;
  text-decoration: none;
  color: var(--text-primary);
}

.note-card h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
  line-height: 1.3;
}

.note-meta {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  display: flex;
  gap: 1.5rem;
  align-items: center;
  flex-wrap: wrap;
}

.meta-top {
  display: flex;
  gap: 1.5rem;
  align-items: center;
  flex-wrap: wrap;
}

.note-meta > *:not(.note-tags) {
  order: 1;
}

.note-meta .note-tags {
  order: 2;
  width: 100%;
  margin-top: 0.5rem;
}

.note-header-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.note-header-top h1 {
  margin-top: 1rem;
  font-size: 2.75rem;
}

.github-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 1.25rem;
  transition: color var(--transition-duration) var(--transition-timing);
}

.github-link:hover {
  color: var(--accent-color);
}

.note-tags {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 0;
  align-items: center;
}

.tag {
  background-color: var(--bg-primary);
  color: var(--text-secondary);
  padding: 0.25rem 0.75rem;
  border-radius: 16px;
  font-size: 0.75rem;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s ease;
  border: 1px solid var(--border-color);
}

.tag:hover,
.tag.active {
  background-color: var(--accent-color);
  color: var(--bg-primary);
  border-color: var(--accent-color);
}

.container .navbar {
  display: none;
}

.note-content {
  line-height: 1.8;
  color: var(--text-primary);
  font-size: 1.125rem;
}

.note-content h1,
.note-content h2,
.note-content h3 {
  margin: 2.5rem 0 1.5rem;
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.3;
  scroll-margin-top: 300px;
}

.note-content h1 {
  font-size: 2.5rem;
}
.note-content h2 {
  font-size: 2rem;
}
.note-content h3 {
  font-size: 1.5rem;
}

.note-content p {
  margin-bottom: 1.5rem;
  color: var(--text-secondary);
}

.note-content ul {
  margin-left: 2rem;
  padding-left: 1.5rem;
}

.note-content li {
  margin-bottom: 0.75rem;
  position: relative;
  line-height: 1.6;
}

.note-content li::before {
  position: absolute;
  left: -1.25rem;
  color: var(--accent-color);
  font-size: 1.2em;
}

.note-content img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 2rem auto;
  border-radius: 8px;
  box-shadow: 0 2px 8px var(--shadow-color);
}

.note-content blockquote {
  margin: 2rem 0;
  padding: 1.5rem 2rem;
  border-left: 4px solid var(--accent-color);
  background-color: var(--bg-primary);
  position: relative;
}

.note-content blockquote::before {
  content: "\201B\201B";
  position: absolute;
  left: 0.2rem;
  top: -1.5rem;
  font-size: 4.5rem;
  color: var(--accent-color);
  opacity: 0.5;
}

.note-content blockquote p {
  font-style: italic;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.note-content blockquote cite {
  display: block;
  margin-top: 1rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-style: normal;
}

.tag-cloud-container {
  width: 100%;
  height: 250px;
  margin: 2rem 0;
  background-color: var(--bg-primary);
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.tag-cloud-container svg {
  width: 100%;
  height: 100%;
}

.tag-cloud-container text {
  transition: opacity 0.2s ease;
}

.note-content a {
  color: var(--accent-color);
  text-decoration: underline;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

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

.note-content code {
  background-color: var(--bg-secondary);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-size: 0.875em;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.note-content pre {
  background-color: var(--bg-secondary);
  padding: 1.5rem;
  border-radius: 8px;
  overflow-x: auto;
  margin: 2rem 0;
  border: 1px solid var(--border-color);
}

.note-navigation {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin: 3rem 0;
}

.nav-link {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 1rem;
  text-decoration: none;
  transition: all 0.2s ease;
}

.nav-link:hover {
  background-color: var(--bg-secondary);
  color: var(--accent-color);
}

.nav-link.prev {
  text-align: left;
  border: 1px solid var(--border-color-secondary);
}

.nav-link.next {
  text-align: right;
  border: 1px solid var(--border-color-secondary);
}

.nav-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.nav-title {
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1.4;
  margin: 2rem 0;
}

.copy-link-btn {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 500;
  transition: all 0.2s ease;
  margin-bottom: 1.5rem;
}

.toc-link.active {
  color: var(--accent-color);
  font-weight: 500;
  position: relative;
}

.toc-link.active::after {
  content: "";
  position: absolute;
  left: -1rem;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 1rem;
  background-color: var(--accent-color);
  border-radius: 2px;
}

.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background-color: var(--accent-color);
  color: var(--bg-primary);
  border: none;
  border-radius: 50%;
  width: 4.5rem;
  height: 4.5rem;
  font-size: 2.25rem;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.3s ease-in-out;
  z-index: 1000;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background-color: var(--accent-color);
  color: var(--bg-primary);
  border-color: var(--accent-color);
  transform: translateY(-2px);
}

.github-link {
  display: inline-block;
  width: 32px;
  height: 32px;
  background-image: var(--github-icon);
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  opacity: 0.7;
  margin-top: -0.2rem;
  transition: opacity var(--transition-duration) var(--transition-timing);
}

.github-link:hover {
  opacity: 1;
}

[data-theme="light"] {
  --github-icon: url("data:image/svg+xml;charset=utf-8,<svg viewBox=\"0 0 24 24\" xmlns=\"http://www.w3.org/2000/svg\"><path fill=\"%23000000\" d=\"M12 0C5.37 0 0 5.37 0 12c0 5.31 3.435 9.795 8.205 11.385.6.105.825-.255.825-.57 0-.285-.015-1.23-.015-2.235-3.015.555-3.795-.735-4.035-1.41-.135-.345-.72-1.41-1.23-1.695-.42-.225-1.02-.78-.015-.795.945-.015 1.62.87 1.845 1.23 1.08 1.815 2.805 1.305 3.495.99.105-.78.42-1.305.765-1.605-2.67-.3-5.46-1.335-5.46-5.925 0-1.305.465-2.385 1.23-3.225-.12-.3-.54-1.53.12-3.18 0 0 1.005-.315 3.3 1.23.96-.27 1.98-.405 3-.405s2.04.135 3 .405c2.295-1.56 3.3-1.23 3.3-1.23.66 1.65.24 2.88.12 3.18.765.84 1.23 1.905 1.23 3.225 0 4.605-2.805 5.625-5.475 5.925.435.375.81 1.095.81 2.22 0 1.605-.015 2.895-.015 3.3 0 .315.225.69.825.57A12.02 12.02 0 0 0 24 12c0-6.63-5.37-12-12-12z\"/></svg>");
}

[data-theme="dark"] {
  --github-icon: url("data:image/svg+xml;charset=utf-8,<svg viewBox=\"0 0 24 24\" xmlns=\"http://www.w3.org/2000/svg\"><path fill=\"%23ffffff\" d=\"M12 0C5.37 0 0 5.37 0 12c0 5.31 3.435 9.795 8.205 11.385.6.105.825-.255.825-.57 0-.285-.015-1.23-.015-2.235-3.015.555-3.795-.735-4.035-1.41-.135-.345-.72-1.41-1.23-1.695-.42-.225-1.02-.78-.015-.795.945-.015 1.62.87 1.845 1.23 1.08 1.815 2.805 1.305 3.495.99.105-.78.42-1.305.765-1.605-2.67-.3-5.46-1.335-5.46-5.925 0-1.305.465-2.385 1.23-3.225-.12-.3-.54-1.53.12-3.18 0 0 1.005-.315 3.3 1.23.96-.27 1.98-.405 3-.405s2.04.135 3 .405c2.295-1.56 3.3-1.23 3.3-1.23.66 1.65.24 2.88.12 3.18.765.84 1.23 1.905 1.23 3.225 0 4.605-2.805 5.625-5.475 5.925.435.375.81 1.095.81 2.22 0 1.605-.015 2.895-.015 3.3 0 .315.225.69.825.57A12.02 12.02 0 0 0 24 12c0-6.63-5.37-12-12-12z\"/></svg>");
}

.copy-link-btn:hover {
  background-color: var(--accent-color);
  color: var(--bg-primary);
  border-color: var(--accent-color);
}

.back-to-notes.floating {
  position: fixed;
  top: 20px;
  left: 20px;
  color: var(--text-secondary);
  text-decoration: none;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  z-index: 100;
  margin-bottom: 0;
  font-weight: 500;
  font-size: 0.9375rem;
}

.back-to-notes.floating.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-notes.floating:hover {
  color: var(--accent-color);
}

@media (max-width: 768px) {
  .container {
    padding: 1.5rem;
  }

  .home-page h1 {
    font-size: 2.5rem;
  }

  .note-card {
    margin: 1.5rem 1rem;
  }

  .back-to-top {
    bottom: 1.5rem;
    right: 1.5rem;
  }

  .note-content {
    font-size: 1rem;
  }

  .note-content h1 {
    font-size: 2rem;
  }
  .note-content h2 {
    font-size: 1.75rem;
  }
  .note-content h3 {
    font-size: 1.5rem;
  }
}

.hcb-icon {
  display: none !important;
}

#HCB_comment_box {
  max-height: 800px;
  overflow: scroll;
  margin-bottom: 10rem;
}

[data-theme="dark"] {
  --label-color: white;
}

.home-desc {
  display: none !important;
}

#HCB_comment_box label {
  color: var(--label-color) !important;
}

.table-of-contents {
  position: fixed;
  right: 2rem;
  top: 6rem;
  width: 250px;
  max-height: calc(100vh - 8rem);
  overflow-y: auto;
  padding: 1.5rem;
  background: var(--bg-primary);
  border-left: 2px solid #eaeaea;
  font-size: 0.9rem;
  z-index: 100;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  transform: translateZ(0);
  will-change: transform;
}

.table-of-contents h2 {
  margin-top: 0;
  margin-bottom: 1rem;
  font-size: 1.1rem;
  color: var(--text-primary);
}

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

.toc-list ul {
  list-style: none;
  padding-left: 1rem;
  margin: 0.5rem 0;
}

.toc-list li {
  margin: 0.5rem 0;
  line-height: 1.4;
}

.toc-link {
  color: var(--text-secondary);
  text-decoration: none;
  display: block;
  padding: 0.2rem 0;
  transition: color 0.2s ease;
}

.toc-link:hover {
  color: var(--accent-color);
}

.toc-link.active {
  color: var(--accent-color);
  font-weight: 500;
}

/* Adjust main content to make space for TOC */
.container.with-toc {
  max-width: min(calc(100% - 300px), 1000px);
  margin: 0 auto;
  padding: 0 2rem;
  margin-right: 300px;
  position: relative;
  width: 100%;
  box-sizing: border-box;
}

/* Center content when TOC is hidden */
@media (max-width: 1200px) {
  .table-of-contents {
    display: none;
  }

  .container.with-toc {
    max-width: min(100%, 800px);
    margin: 0 auto;
    padding: 0 2rem;
  }
}

/* Mobile CSS */
@media (max-width: 768px) {
  .container.with-toc {
    padding: 0 1rem;
  }

  .back-to-notes {
    display: none;
  }

  .tag-cloud-container {
    display: none;
  }

  .back-to-top {
    display: none;
  }

  .theme-toggle {
    display: none;
  }
}

@media (max-width: 1200px) {
  .table-of-contents {
    display: none;
  }

  .container.with-toc {
    max-width: 100%;
    margin: 0 auto;
    padding: 0 2rem;
  }
}

.external-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 1rem;
  transition: color var(--transition-duration) var(--transition-timing);
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.external-link:hover {
  color: var(--accent-color);
}

.external-link sup {
  font-size: 0.75rem;
  line-height: 1;
}

.pinned-notes-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2rem;
  padding: 1rem;
  background: var(--background-secondary);
  border-radius: 8px;
}

.pinned-note {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--background-primary);
  border-radius: 4px;
  text-decoration: none;
  color: var(--text-primary);
  transition: transform 0.2s ease;
}

.pinned-note:hover {
  transform: translateY(-2px);
}

.carousel-container {
  position: relative;
  width: 80%;
  max-width: 800px;
  margin: 0 auto;
  padding: 0 40px;
}

.pinned-notes-viewport {
  overflow: hidden;
  margin: 0 auto;
  padding: 1rem 0;
  text-align: center;
}

.pinned-notes-container {
  display: flex;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.pinned-note {
  flex: 0 0 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1rem;
  padding: 1.5rem 2rem;
  background: var(--bg-secondary);
  border-radius: 12px;
  text-decoration: none;
  color: var(--text-primary);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}

.pinned-note:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.pin-icon {
  font-size: 1.2rem;
  color: var(--accent-color);
  flex-shrink: 0;
}

.carousel-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: var(--background-secondary);
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  font-size: 1.4rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  transition: all 0.3s ease;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

.carousel-arrow:hover {
  background: var(--background-hover);
  transform: translateY(-50%) scale(1.1);
}

.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 0.8rem;
  margin-top: 1.5rem;
}

.carousel-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--text-secondary);
  border: none;
  padding: 0;
  cursor: pointer;
  opacity: 0.4;
  transition: all 0.3s ease;
}

.carousel-dot:hover {
  opacity: 0.7;
}

.carousel-dot.active {
  opacity: 1;
  background: var(--accent-color);
  transform: scale(1.2);
}

.carousel-arrow.prev {
  left: 0;
}

.carousel-arrow.next {
  right: 0;
}

.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 1rem;
}

.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-secondary);
  border: none;
  padding: 0;
  cursor: pointer;
  opacity: 0.5;
  transition: opacity 0.3s;
}

.carousel-dot.active {
  opacity: 1;
}