/* Blog post layout — mirrors thinkingmachines.ai/blog/lora/ */

#main.post {
  --post-caption-font-size: 13px;
  --sidenote-width: 230px;
  --sidenote-gap: 64px;
  --toc-width: 210px;
  --toc-gap: 34px;

  position: relative;
  max-width: 950px;
  margin: 0 auto;
  counter-reset: sidenote-counter figure-counter;
}

@media (min-width: 1200px) {
  #main.post { max-width: 970px; --sidenote-width: 240px; }
}

@media (min-width: 1400px) {
  #main.post { max-width: 990px; --sidenote-width: 250px; }
}

@media (min-width: 1600px) {
  #main.post { max-width: 1010px; --sidenote-width: 275px; }
}

/* Heading block */
#main.post .post-heading {
  text-align: center;
}

#main.post .post-title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 30px;
  line-height: 1.4;
  max-width: 710px;
  margin: 1.5rem auto 0;
  text-wrap: balance;
}

#main.post .post-subtitle {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 400;
  font-style: italic;
  color: var(--fg4);
  margin-top: 0.5rem;
}

#main.post .publish-metadata {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 1rem 0 2rem;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.4;
  color: var(--fg3);
}

#main.post .publish-metadata .author {
  max-width: 680px;
  color: var(--fg);
  letter-spacing: 0.24px;
  text-wrap: balance;
}

#main.post .publish-metadata .author a {
  color: inherit;
  text-decoration: none;
}

#main.post .publish-metadata .author a:hover {
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--fg) 20%, transparent);
  text-underline-offset: 2px;
}

#main.post .publish-metadata > span {
  padding-top: 0.6em;
}

/* Cover */
#main.post .post-cover {
  margin: 2rem 0;
  text-align: center;
}

#main.post .post-cover img,
#main.post .post-cover svg {
  display: block;
  width: 80%;
  max-width: min(80%, 100vw);
  height: auto;
  margin: 0 auto;
}

#main.post .post-cover figcaption {
  margin-top: 0.75rem;
  font-family: var(--font-serif);
  font-size: var(--post-caption-font-size);
  color: var(--fg4);
  line-height: 1.4;
}

/* Three-column shell: TOC | article | sidenote rail */
#main.post .post-content-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 660px) minmax(0, 1fr);
  align-items: start;
}

#main.post .post-content-shell > article.content {
  grid-column: 2;
  width: 100%;
  max-width: 660px;
  margin: 0 auto;
  position: relative;
  overflow: visible;
}

/* Left TOC */
#main.post .left-toc {
  --toc-chevron-color: color-mix(in srgb, var(--fg4) 65%, var(--bg) 35%);
  --toc-chevron-gutter: 1.3rem;

  grid-column: 1;
  justify-self: end;
  position: sticky;
  top: calc(var(--site-header-height) + 2rem);
  width: calc(var(--toc-width) + var(--toc-chevron-gutter));
  max-height: calc(100vh - var(--site-header-height) - 3rem);
  margin: 0 var(--toc-gap) 0 0;
  padding-left: var(--toc-chevron-gutter);
  overflow-y: auto;
  font-family: var(--font-sans);
  font-size: var(--post-caption-font-size);
  line-height: 1.4;
  color: var(--fg2);
  scrollbar-width: none;
  transform: translateY(10px);
}

#main.post .left-toc::-webkit-scrollbar {
  display: none;
}

#main.post .left-toc ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

#main.post .left-toc li {
  margin: 0 0 0.7rem;
}

#main.post .left-toc ul ul {
  padding-left: 0.75rem;
  margin-top: 0.35rem;
}

#main.post .left-toc a {
  color: var(--fg4);
  text-decoration: none;
  transition: color 0.2s ease;
}

#main.post .left-toc a:hover {
  color: var(--fg1);
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--fg1) 20%, var(--bg) 20%);
  text-underline-offset: 2px;
}

#main.post .left-toc a.is-active,
#main.post .left-toc a[aria-current="location"] {
  color: var(--fg);
}

/* Sidenotes */
#main.post .sidenote,
#main.post .marginnote {
  float: right;
  clear: right;
  width: var(--sidenote-width);
  margin: 0.3rem 0 20px var(--sidenote-gap);
  margin-right: calc(-1 * var(--sidenote-width) - var(--sidenote-gap));
  font-size: 0.9rem;
  line-height: 1.4;
  position: relative;
}

#main.post .sidenote-number {
  counter-increment: sidenote-counter;
}

#main.post .sidenote-number::after {
  content: counter(sidenote-counter);
  font-family: var(--font-serif);
  font-size: 0.8rem;
  color: var(--fg4);
  position: relative;
  top: -0.5rem;
}

#main.post .sidenote::before {
  content: counter(sidenote-counter);
  padding-right: 0.2rem;
  font-family: var(--font-serif);
  font-size: 0.8rem;
  color: var(--fg4);
  position: relative;
  top: -0.4rem;
}

#main.post .sidenote img {
  display: block;
  width: 100%;
  margin-top: 0.65rem;
  border-radius: 2px;
}

#main.post .sidenote .sidenote-caption {
  display: block;
  margin-top: 0.35rem;
  font-family: var(--font-sans);
  font-size: 11px;
  color: var(--fg5);
  line-height: 1.35;
}

.margin-toggle {
  display: none;
}

/* Paginator */
.paginator {
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  margin-top: 3.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid color-mix(in srgb, var(--fg4) 10%, transparent);
  font-family: var(--font-sans);
  font-size: 15px;
}

.paginator a {
  color: var(--fg3);
  text-decoration: none;
}

.paginator a:hover {
  color: var(--fg);
  text-decoration: underline;
  text-underline-offset: 2px;
}

#back-to-top {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  color: var(--fg4);
}

/* Hide TOC / sidenotes on narrow viewports */
@media (max-width: 1100px) {
  #main.post .left-toc {
    display: none;
  }

  #main.post .post-content-shell {
    grid-template-columns: minmax(0, 1fr);
  }

  #main.post .post-content-shell > article.content {
    grid-column: 1;
    padding: 0 var(--content-pad);
  }

  #main.post .sidenote,
  #main.post .marginnote {
    float: none;
    width: auto;
    margin: 1rem 0 1rem 1rem;
    padding-left: 1rem;
    border-left: 2px solid color-mix(in srgb, var(--fg4) 35%, var(--bg) 65%);
  }
}

@media (max-width: 1170px) {
  #main.post {
    padding-left: 0;
    padding-right: 0;
  }
}