@import url("/assets/css/hierarchy.css");

body.whiteboard-page {
  background: #f6f5f1;
}

.whiteboard-page .site-header {
  background: rgba(246,245,241,.94);
}

.whiteboard-page .article-hero {
  background:
    linear-gradient(rgba(100,116,139,.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(100,116,139,.08) 1px, transparent 1px),
    #f6f5f1;
  background-size: 32px 32px;
  border-bottom-color: #d8d6cf;
}

.whiteboard-page .article-hero .shell,
.whiteboard-page article.shell {
  width: min(calc(100% - 40px), 1040px);
}

.whiteboard-page .article-hero h1 {
  max-width: 820px;
  font-size: clamp(2.7rem,6vw,5.4rem);
}

.whiteboard-page .article-intro {
  max-width: 720px;
  color: #4b5563;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.18rem,2vw,1.42rem);
  line-height: 1.65;
}

.whiteboard-page .article-body {
  padding-top: 64px;
}

.whiteboard-layout {
  display: grid;
  grid-template-columns: 220px minmax(0,680px);
  gap: 72px;
  justify-content: center;
  align-items: start;
}

.whiteboard-toc {
  position: sticky;
  top: 104px;
  padding-top: 6px;
  color: #6b7280;
  font-size: .82rem;
}

.whiteboard-toc strong {
  display: block;
  margin-bottom: 12px;
  color: #374151;
  font-size: .74rem;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.whiteboard-toc a {
  display: block;
  padding: 5px 0;
  text-decoration: none;
}

.whiteboard-toc a:hover { color: #111827; }

.whiteboard-prose {
  max-width: 680px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.08rem;
  line-height: 1.78;
  color: #374151;
}

.whiteboard-prose h2,
.whiteboard-prose h3,
.whiteboard-prose .technical-label,
.whiteboard-prose figcaption,
.whiteboard-prose table,
.whiteboard-prose .method-box {
  font-family: "DM Sans", "Segoe UI", Arial, sans-serif;
}

.whiteboard-prose h2 {
  scroll-margin-top: 110px;
  margin: 78px 0 18px;
  padding-top: 18px;
  border-top: 1px solid #d8d6cf;
  color: #1f2937;
  font-size: 2rem;
  line-height: 1.15;
  letter-spacing: -.035em;
}

.whiteboard-prose h3 {
  margin-top: 42px;
  color: #1f2937;
  font-size: 1.25rem;
}

.whiteboard-prose p:first-child { margin-top: 0; }

.technical-label {
  display: inline-block;
  margin-bottom: 10px;
  color: #6b7280;
  font-size: .72rem;
  font-weight: 750;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.method-box {
  margin: 34px 0;
  padding: 22px 24px;
  border: 1px solid #d3d1c9;
  border-left: 4px solid #475569;
  background: rgba(255,255,255,.55);
  border-radius: 2px 10px 10px 2px;
  color: #475569;
  font-size: .94rem;
}

.method-box strong {
  display: block;
  margin-bottom: 8px;
  color: #1f2937;
}

.technical-figure {
  margin: 42px 0;
  padding: 24px;
  border: 1px solid #d3d1c9;
  background: rgba(255,255,255,.5);
}

.technical-figure .diagram-flow {
  display: grid;
  grid-template-columns: repeat(5,minmax(0,1fr));
  gap: 7px;
  font-family: "DM Sans", "Segoe UI", Arial, sans-serif;
}

.technical-figure .diagram-flow span {
  padding: 10px 8px;
  border: 1px solid #cbd5e1;
  background: #fff;
  text-align: center;
  font-size: .75rem;
  position: relative;
}

.technical-figure .diagram-flow span:not(:last-child)::after {
  content: "→";
  position: absolute;
  right: -9px;
  color: #94a3b8;
}

.technical-figure figcaption {
  margin-top: 16px;
  color: #6b7280;
  font-size: .78rem;
}

.whiteboard-prose table {
  width: 100%;
  margin: 34px 0;
  border-collapse: collapse;
  font-size: .86rem;
}

.whiteboard-prose th,
.whiteboard-prose td {
  padding: 10px 12px;
  border-bottom: 1px solid #d8d6cf;
  text-align: left;
  vertical-align: top;
}

.whiteboard-prose th { color: #374151; font-weight: 700; }
.whiteboard-prose td { color: #5b6470; }

.whiteboard-related {
  margin-top: 72px;
  padding-top: 24px;
  border-top: 1px solid #d8d6cf;
  font-family: "DM Sans", "Segoe UI", Arial, sans-serif;
}

.whiteboard-related p { color: #6b7280; font-size: .9rem; }

@media (max-width: 850px) {
  .whiteboard-layout { grid-template-columns: 1fr; gap: 30px; }
  .whiteboard-toc { position: static; border-bottom: 1px solid #d8d6cf; padding-bottom: 20px; }
  .technical-figure .diagram-flow { grid-template-columns: 1fr; }
  .technical-figure .diagram-flow span:not(:last-child)::after { content: "↓"; right: auto; left: 50%; bottom: -13px; top: auto; }
}