/* Reading and discovery extend attenlo's established paper/citron system. */
.reading-hero {
  padding-block: 38px 64px;
}
.reading-hero h1 {
  font-size: clamp(2.4rem, 4.8vw, 4.6rem);
  line-height: 1.1;
  letter-spacing: -0.035em;
  font-weight: 650;
  max-width: 21ch;
  text-wrap: balance;
}
.reading-intro {
  max-width: 68ch;
  font-size: 1.125rem;
  margin-block: 26px 28px;
}
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.875rem;
  margin-bottom: 30px;
}
.breadcrumbs a,
.reading-body a,
.reading-layout a,
.availability-note a {
  text-decoration: underline;
  text-underline-offset: 0.2em;
}
.reading-layout {
  display: grid;
  grid-template-columns: minmax(220px, 0.8fr) minmax(0, 2fr);
  gap: 80px;
  padding-block: 72px;
  align-items: start;
}
.reading-body {
  max-width: 72ch;
}
.reading-body section + section {
  margin-top: 48px;
}
.product-page .reading-body h2 {
  font-size: clamp(1.65rem, 2.2vw, 2.2rem);
  line-height: 1.25;
}
.reading-body p {
  margin-top: 18px;
}
.reading-body .source-note {
  margin-top: 36px;
  font-size: 0.875rem;
}
.operating-example {
  margin: 0;
  padding: 24px;
  background: var(--soft);
  border-radius: 12px;
}
.operating-example figcaption {
  font-size: 0.875rem;
  margin-bottom: 20px;
}
.product-page .operating-example h2 {
  font-size: 1.3rem;
  line-height: 1.4;
}
.operating-example ol {
  list-style: none;
  padding: 0;
  margin-top: 20px;
}
.operating-example li {
  padding-block: 12px;
  border-top: 1px solid var(--line);
}
.availability-note,
.article-byline,
.download-note {
  font-size: 0.875rem;
  margin-top: 20px;
  max-width: 70ch;
}
.article-toc {
  font-size: 0.9375rem;
  border-top: 1px solid var(--line);
  padding-top: 20px;
}
.article-toc ol {
  padding-left: 20px;
  margin-top: 16px;
}
.article-toc li {
  padding-block: 7px;
  line-height: 1.55;
}
.discovery,
.related-section,
.guide-index {
  padding-block: 70px;
}
.discovery > div {
  max-width: 60ch;
}
.discovery p {
  margin-top: 18px;
}
.resource-links {
  list-style: none;
  padding: 0;
  margin-top: 30px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 40px;
}
.resource-links li {
  border-top: 1px solid var(--line);
}
.resource-links a {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding-block: 20px;
  font-weight: 600;
  line-height: 1.5;
}
.resource-links .icon,
.guide-index .icon {
  flex-shrink: 0;
  align-self: center;
}
.resource-links a:hover,
.guide-index a:hover {
  text-decoration: underline;
  text-underline-offset: 0.2em;
}
.guide-index article {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  border-top: 1px solid var(--line);
  padding-block: 30px;
}
.guide-index h2 {
  margin-bottom: 34px;
}
.guide-index + .guide-index {
  padding-top: 0;
}
.guide-topics {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  margin-top: 32px;
  font-size: 0.9375rem;
}
.guide-topics a {
  text-decoration: underline;
  text-underline-offset: 0.2em;
  padding-block: 10px;
}
.guide-index h3 a {
  display: flex;
  align-items: start;
  gap: 24px;
  line-height: 1.45;
}
.knowledge-page .final-section .availability-note {
  margin-inline: auto;
}
.knowledge-page :target {
  scroll-margin-top: 28px;
}
.knowledge-page .reading-hero .button {
  width: fit-content;
}
.knowledge-page ::selection {
  background: var(--ink);
  color: var(--citron);
}
@media (max-width: 800px) {
  .reading-hero {
    padding-block: 24px 44px;
  }
  .reading-layout {
    grid-template-columns: 1fr;
    gap: 36px;
    padding-block: 48px;
  }
  .reading-layout aside {
    max-width: 72ch;
  }
  .operating-example ol {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 16px;
  }
  .resource-links {
    grid-template-columns: 1fr;
  }
  .guide-index article {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .discovery,
  .related-section,
  .guide-index {
    padding-block: 48px;
  }
  .knowledge-page .site-header nav {
    gap: 14px;
  }
  .knowledge-page .site-header .login-link {
    display: none;
  }
  .knowledge-page .site-header .nav-cta {
    padding: 12px;
  }
}
@media (max-width: 420px) {
  .knowledge-page .site-header nav {
    font-size: 0.875rem;
    gap: 10px;
  }
  .knowledge-page .wordmark span {
    font-size: 25px;
  }
  .knowledge-page .wordmark img {
    width: 29px;
    height: 29px;
  }
  .knowledge-page .site-header .nav-cta {
    padding: 10px 8px;
  }
}