/* ============================================================
   organvm — Public Process
   Stylesheet for the ORGAN-V essay site
   ============================================================ */

/* --- CSS Variables --- */
:root {
  --bg: #0d1117;
  --fg: #c9d1d9;
  --accent: #58a6ff;
  --accent-hover: #79b8ff;
  --muted: #8b949e;
  --border: #30363d;
  --surface: #161b22;
  --max-width: 720px;
}

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

/* --- Base Typography --- */
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.7;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

h1, h2, h3, h4, h5, h6 {
  color: #e6edf3;
  margin: 1.5em 0 0.5em;
}

h1 {
  font-size: 2em;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.3em;
}

h2 {
  font-size: 1.5em;
}

h3 {
  font-size: 1.25em;
}

p {
  margin: 0.8em 0;
}

ul, ol {
  margin: 0.8em 0 0.8em 1.5em;
}

li {
  margin: 0.3em 0;
}

code {
  background: var(--surface);
  padding: 0.2em 0.4em;
  border-radius: 3px;
  font-size: 0.9em;
}

pre {
  background: var(--surface);
  padding: 1em;
  border-radius: 6px;
  overflow-x: auto;
  margin: 1em 0;
}

pre code {
  background: none;
  padding: 0;
}

blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 1em;
  color: var(--muted);
  margin: 1em 0;
}

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2em 0;
}

img {
  max-width: 100%;
  height: auto;
}

/* --- Layout Container --- */
.site-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1rem;
}

/* --- Site Header --- */
.site-header {
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
  margin-bottom: 2rem;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.site-title {
  font-size: 1.2em;
  font-weight: 600;
  color: #e6edf3;
  text-decoration: none;
  white-space: nowrap;
}

.site-title:hover {
  color: var(--accent);
  text-decoration: none;
}

.site-nav a {
  margin-left: 1.5em;
  font-size: 0.95em;
}

.site-nav a:first-child {
  margin-left: 0;
}

.rss-link {
  opacity: 0.7;
}

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

/* --- Site Footer --- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 0;
  margin-top: 3rem;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1rem;
  color: var(--muted);
  font-size: 0.85em;
  text-align: center;
}

.footer-inner p {
  margin: 0.3em 0;
}

.footer-links .separator {
  margin: 0 0.5em;
  color: var(--border);
}

/* --- Meta / Date Lines --- */
.meta {
  color: var(--muted);
  font-size: 0.9em;
  margin-bottom: 0.5em;
}

.meta span {
  margin-right: 1.5em;
}

/* --- Tags --- */
.tag {
  background: var(--surface);
  color: var(--accent);
  padding: 0.2em 0.6em;
  border-radius: 12px;
  font-size: 0.8em;
  margin-right: 0.3em;
  display: inline-block;
  margin-bottom: 0.3em;
  text-decoration: none;
  border: 1px solid var(--border);
  transition: background 0.15s ease, border-color 0.15s ease;
}

.tag:hover {
  background: var(--border);
  border-color: var(--accent);
  text-decoration: none;
}

.tag-count {
  color: var(--muted);
  font-size: 0.9em;
}

.tag-cloud {
  margin: 1em 0;
  line-height: 2.2;
}

.tag-posts {
  list-style: none;
  margin: 0.5em 0 1.5em 0;
  padding: 0;
}

.tag-posts li {
  padding: 0.4em 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.5em;
}

.tag-posts li:last-child {
  border-bottom: none;
}

.tag-posts .meta {
  font-size: 0.85em;
  margin: 0;
  flex-shrink: 0;
}

/* --- Essay Navigation (Prev/Next) --- */
.essay-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 3em;
  padding-top: 1.5em;
  border-top: 1px solid var(--border);
  gap: 1em;
}

.essay-nav .nav-prev,
.essay-nav .nav-next {
  max-width: 48%;
}

.essay-nav .nav-next {
  text-align: right;
  margin-left: auto;
}

.essay-nav .nav-label {
  display: block;
  font-size: 0.8em;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.3em;
}

.essay-nav a {
  font-size: 0.95em;
}

/* --- Essay Tags Display --- */
.essay-tags {
  margin-top: 2em;
  padding-top: 1em;
  border-top: 1px solid var(--border);
}

.essay-tags-label {
  font-size: 0.85em;
  color: var(--muted);
  margin-bottom: 0.5em;
}

/* --- Academic: Footnotes (kramdown) --- */
.footnotes {
  margin-top: 3em;
  padding-top: 1.5em;
  border-top: 2px solid var(--border);
  font-size: 0.88em;
  line-height: 1.6;
}

.footnotes::before {
  content: "References";
  display: block;
  font-size: 1.3em;
  font-weight: 600;
  color: #e6edf3;
  margin-bottom: 0.8em;
}

.footnotes ol {
  margin-left: 1.8em;
  counter-reset: footnote-counter;
}

.footnotes li {
  margin: 0.6em 0;
  padding-left: 0.3em;
}

.footnotes li p {
  margin: 0.2em 0;
}

sup a.footnote {
  color: var(--accent);
  font-size: 0.85em;
  font-weight: 600;
  text-decoration: none;
  padding: 0 0.15em;
}

sup a.footnote:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

a.reversefootnote {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9em;
}

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

/* --- Academic: Figures & Captions --- */
figure {
  margin: 2em 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1.2em;
  overflow-x: auto;
}

figcaption {
  font-size: 0.88em;
  color: var(--muted);
  font-style: italic;
  text-align: center;
  margin-top: 0.8em;
  padding-top: 0.6em;
  border-top: 1px solid var(--border);
}

/* --- Academic: Mermaid Diagrams --- */
.mermaid {
  text-align: center;
  margin: 1.5em 0;
}

pre.mermaid {
  background: transparent;
  border: none;
  padding: 0;
}

/* --- Academic: Tables --- */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5em 0;
  font-size: 0.92em;
}

th {
  background: var(--surface);
  color: #e6edf3;
  font-weight: 600;
  text-align: left;
  padding: 0.6em 0.8em;
  border-bottom: 2px solid var(--border);
}

td {
  padding: 0.5em 0.8em;
  border-bottom: 1px solid var(--border);
}

tr:hover td {
  background: rgba(88, 166, 255, 0.04);
}

/* --- Academic: Stat Grid (HTML in essays) --- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1em;
  margin: 1.5em 0;
}

.stat {
  text-align: center;
  padding: 1em 0.5em;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
}

.stat-value {
  font-size: 1.8em;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.2;
}

.stat-label {
  font-size: 0.78em;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 0.3em;
}

/* --- Responsive --- */
@media (max-width: 600px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .site-nav a {
    margin-left: 0;
    margin-right: 1.2em;
  }

  .site-nav {
    margin-top: 0.5em;
  }

  h1 {
    font-size: 1.6em;
  }

  h2 {
    font-size: 1.3em;
  }

  .essay-nav {
    flex-direction: column;
  }

  .essay-nav .nav-prev,
  .essay-nav .nav-next {
    max-width: 100%;
    text-align: left;
  }

  .tag-posts li {
    flex-direction: column;
    gap: 0.2em;
  }

  .stat-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  figure {
    padding: 0.8em;
  }
}

@media (max-width: 400px) {
  body {
    font-size: 0.95em;
  }

  .site-content {
    padding: 0 0.75rem;
  }

  .stat-grid {
    grid-template-columns: 1fr 1fr;
  }
}