/* Distill-inspired styling with sidenotes */

:root {
  --text-color: #2d2a23;
  --accent-color: #8d5d45;
  --bg-color: rgb(255, 252, 246);
  --surface-color: #fcf7eb;
  --meta-color: #888;
  --sidenote-color: #555;
  --border-color: #d9d4c8;
  --code-bg: #f3f0e8;
  --content-width: 800px;
  --sidenote-width: 250px;
  --sidenote-gap: 30px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text-color);
  background: var(--bg-color);
  line-height: 1.7;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}

article.post {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

/* Shift content left on wide screens to make room for sidenotes */
@media (min-width: 1100px) {
  article.post {
    margin-left: max(2rem, calc(50% - 510px));
    margin-right: auto;
  }
}

header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.post-title {
  font-size: 2.2rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 0.5rem;
}

.post-authors {
  font-size: 1.1rem;
  color: var(--meta-color);
  margin-bottom: 0.25rem;
}

.post-affiliations {
  font-size: 0.9rem;
  color: var(--meta-color);
  margin-bottom: 0.25rem;
}

.post-date {
  font-size: 0.95rem;
  color: var(--meta-color);
}

.github-link {
  display: inline-block;
  margin-top: 0.5rem;
  font-size: 0.9rem;
  color: var(--meta-color);
  text-decoration: none;
}

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

/* Equation references */
.MathJax a {
  fill: var(--accent-color) !important;
}

/* Table of Contents */
.toc {
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 0.75rem 1.25rem;
  margin: 0.25rem 0 1.5rem;
}

.toc h2 {
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  margin-top: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-color);
}

.toc ol {
  list-style: decimal;
  padding-left: 1.25rem;
  margin: 0;
  color: var(--accent-color);
}

.toc ol ol {
  list-style: lower-alpha;
  padding-left: 1.25rem;
  margin-top: 0.15rem;
}

.toc li {
  margin-bottom: 0.2rem;
  font-size: 1.1rem;
  line-height: 1.5;
}

.toc a {
  color: var(--accent-color);
  text-decoration: none;
}

.toc a:hover {
  text-decoration: underline;
}

/* Post Content */
.post-content h2 {
  font-size: 1.7rem;
  font-weight: 700;
  margin-top: 1rem;
  margin-bottom: 0.75rem;
}

.post-content h3 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-top: 2rem;
  margin-bottom: 0.5rem;
}

.post-content p {
  margin-bottom: 1.2rem;
}

.post-content strong {
  font-weight: 700;
  color: var(--accent-color);
}

.post-content a {
  color: var(--accent-color);
  text-decoration: none;
}

.post-content a:hover {
  text-decoration: underline;
}

.post-content blockquote {
  border-left: 3px solid var(--accent-color);
  padding: 0.75rem 1.25rem;
  margin: 1.5rem 0;
  background: var(--surface-color);
  font-style: normal;
}

.post-content blockquote strong {
  display: block;
  margin-bottom: 0.3rem;
}

.post-content hr {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 2rem 0;
}

.post-content figure {
  margin: 1.5rem 0;
  text-align: center;
}

.post-content figure img {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
}

.post-content figcaption {
  font-size: 0.9rem;
  color: var(--meta-color);
  margin-top: 0.5rem;
  line-height: 1.5;
  font-style: italic;
}

.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.95rem;
}

.post-content th,
.post-content td {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border-color);
  text-align: left;
}

.post-content th {
  background: var(--surface-color);
  font-weight: 600;
}

.post-content ol,
.post-content ul {
  margin-bottom: 1.2rem;
  padding-left: 1.5rem;
}

.post-content li {
  margin-bottom: 0.3rem;
}

.post-content code {
  background: var(--code-bg);
  padding: 0.15rem 0.35rem;
  border-radius: 3px;
  font-size: 0.9em;
}

/* Sidenotes (Distill-style) */
.sidenote-number {
  color: var(--accent-color);
  font-weight: 600;
  cursor: default;
}

.sidenote {
  font-size: 0.8rem;
  line-height: 1.45;
  color: var(--sidenote-color);
  vertical-align: baseline;
}

.sidenote .sidenote-label {
  font-weight: 600;
  color: var(--accent-color);
  margin-right: 0.1em;
}

.sidenote a {
  color: var(--accent-color);
  text-decoration: none;
}

.sidenote a:hover {
  text-decoration: underline;
}

/* Wide screens: sidenotes in right margin */
@media (min-width: 1100px) {
  .sidenote {
    float: right;
    clear: right;
    margin-right: -280px;
    width: 250px;
    margin-top: 0.2rem;
    margin-bottom: 1rem;
    display: block;
  }
}

/* Narrow screens: hide inline sidenotes, show collected references */
@media (max-width: 1099px) {
  .sidenote {
    display: none;
  }
}

/* Mobile references section: hidden on wide screens */
.mobile-references {
  display: none;
}

@media (max-width: 1099px) {
  .mobile-references {
    display: block;
    margin-top: 2.5rem;
    padding-top: 0.5rem;
    border-top: 1px solid var(--border-color);
  }

  .mobile-references h2 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
  }

  .mobile-references ol {
    padding-left: 1.5rem;
    font-size: 0.88rem;
    line-height: 1.6;
  }

  .mobile-references li {
    margin-bottom: 0.4rem;
  }

  .mobile-references a {
    color: var(--accent-color);
    text-decoration: none;
  }

  .mobile-references a:hover {
    text-decoration: underline;
  }
}

/* Notion-style mini TOC — large screens only */
.mini-toc {
  display: none;
}

@media (min-width: 1400px) {
  .mini-toc {
    display: block;
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    left: 1rem;
    width: 140px;
    font-size: 0.72rem;
    line-height: 1.4;
    border-left: 2px solid var(--border-color);
    padding-left: 0.6rem;
  }

  .mini-toc a {
    display: block;
    color: var(--meta-color);
    text-decoration: none;
    padding: 0.2rem 0;
    transition: color 0.15s;
  }

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

  .mini-toc a.active {
    color: var(--accent-color);
    font-weight: 600;
  }
}

@media (max-width: 600px) {
  article.post {
    padding: 1.5rem 1rem 3rem;
  }
  .post-title {
    font-size: 1.6rem;
  }
}