.mtd-article-toc {
  border: 1px solid hsl(var(--border));
  border-left: 4px solid hsl(var(--primary));
  border-radius: 0.65rem;
  background: linear-gradient(135deg, hsl(var(--card)), hsl(var(--background)));
  padding: 1rem 1.15rem;
  box-shadow: 0 14px 35px rgb(0 0 0 / 18%);
}

.mtd-article-toc summary {
  cursor: pointer;
  list-style: none;
  font-family: Rajdhani, sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  user-select: none;
}

.mtd-article-toc summary::-webkit-details-marker {
  display: none;
}

.mtd-article-toc summary::after {
  content: "\2212";
  float: right;
  color: hsl(var(--primary));
  font-family: Inter, sans-serif;
  font-size: 1.8rem;
  font-weight: 500;
  line-height: 0.7;
}

.mtd-article-toc details:not([open]) summary::after {
  content: "+";
}

.mtd-article-toc ol {
  counter-reset: mtd-toc;
  display: grid;
  gap: 0.45rem;
  margin: 0.9rem 0 0;
  padding: 0;
  list-style: none;
}

.mtd-article-toc li {
  counter-increment: mtd-toc;
}

.mtd-article-toc a {
  display: grid;
  grid-template-columns: 2.1rem minmax(0, 1fr);
  align-items: baseline;
  color: hsl(var(--foreground) / 0.82);
  font-size: 0.94rem;
  line-height: 1.45;
  text-decoration: none;
  transition: color 160ms ease, transform 160ms ease;
}

.mtd-article-toc a::before {
  content: counter(mtd-toc, decimal-leading-zero);
  color: hsl(var(--primary));
  font-family: "JetBrains Mono", monospace;
  font-size: 0.74rem;
  font-weight: 700;
}

.mtd-article-toc a:hover,
.mtd-article-toc a:focus-visible {
  color: hsl(var(--primary));
  transform: translateX(3px);
  outline: none;
}

.mtd-article-section-heading {
  scroll-margin-top: 7rem;
}

@media (min-width: 768px) {
  .mtd-article-toc ol {
    grid-template-rows: repeat(var(--mtd-toc-rows), auto);
    grid-auto-flow: column;
    grid-auto-columns: minmax(0, 1fr);
    column-gap: 1.5rem;
  }
}

@media (max-width: 639px) {
  .mtd-article-toc ol {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: none;
    grid-auto-flow: row;
    grid-auto-columns: auto;
  }

  .mtd-article-toc {
    border-radius: 0.5rem;
    padding: 0.9rem 1rem;
  }

  .mtd-article-toc summary {
    font-size: 1.1rem;
  }
}