.resource-hero {
  padding-block: var(--space-5);
  border-bottom: 1px solid var(--color-border);
  background: #eef3ff;
}

.font-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

.markdown-layout {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: var(--space-5);
  align-items: start;
}

.markdown-toc {
  position: sticky;
  top: 96px;
  max-height: calc(100vh - 120px);
  overflow: auto;
  padding: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  background: #fff;
  box-shadow: var(--shadow-sm);
}

.markdown-toc h2 {
  font-size: 1rem;
  margin-bottom: var(--space-2);
}

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

.markdown-toc li {
  margin: 0.25rem 0;
}

.markdown-toc > .toc > ul > li > a,
.markdown-toc > ul > li > a {
  font-weight: 800;
  color: var(--color-text);
}

.markdown-toc ul ul {
  padding-left: 2em;
}

.markdown-toc ul ul ul {
  padding-left: 2em;
}

.markdown-toc ul ul ul ul {
  padding-left: 2em;
}

.markdown-toc a {
  display: block;
  padding: 0.25rem 0.35rem;
  border-radius: 6px;
  color: var(--color-muted);
}

.markdown-toc a:hover,
.markdown-toc a:focus {
  background: #eef2ff;
  color: var(--color-primary-dark);
}

.markdown-body {
  min-width: 0;
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  background: #fff;
  box-shadow: var(--shadow-sm);
  font-size: 1rem;
}

.markdown-body[data-font-size="small"] {
  font-size: 0.92rem;
}

.markdown-body[data-font-size="large"] {
  font-size: 1.12rem;
}

.markdown-body[data-font-size="xlarge"] {
  font-size: 1.24rem;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4 {
  scroll-margin-top: 96px;
}

.markdown-body h2 {
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.markdown-body p,
.markdown-body li {
  color: #2e3b44;
}

.markdown-body img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: var(--space-4) auto;
  border: 1px solid var(--color-border);
  border-radius: 12px;
}

.markdown-body pre {
  overflow: auto;
  padding: var(--space-3);
  border-radius: 12px;
  background: #172033;
  color: #f8faff;
}

.markdown-body code {
  padding: 0.12rem 0.3rem;
  border-radius: 5px;
  background: #eef2ff;
  color: var(--color-primary-dark);
}

.markdown-body pre code {
  padding: 0;
  background: transparent;
  color: inherit;
}

.markdown-body mjx-container {
  overflow-x: auto;
  overflow-y: hidden;
  max-width: 100%;
}

.markdown-body table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-4) 0;
  overflow: auto;
}

.markdown-body th,
.markdown-body td {
  padding: 0.65rem;
  border: 1px solid var(--color-border);
}

.markdown-body th {
  background: #eef2ff;
  text-align: left;
}

@media (max-width: 900px) {
  .markdown-layout {
    grid-template-columns: 1fr;
  }

  .markdown-toc {
    position: static;
    max-height: none;
  }

  .markdown-body {
    padding: var(--space-4);
  }
}