/* Guides extend the existing forest-and-paper visual system. */
.usecase-label { color: var(--ink-soft); font-size: 15px; margin: 0 0 20px; }
.usecase-page .guide-intro { padding-bottom: 20px; }
.usecase-page .guide-intro .button { margin-top: 8px; max-width: 100%; white-space: normal; text-align: center; }
.usecase-example { padding-bottom: 36px; }
.usecase-example .guide-images { max-width: none; }
.usecase-example .guide-images img { aspect-ratio: 4 / 5; object-fit: contain; background: var(--paper-light); }
.usecase-example .guide-identity { margin: 24px 0 16px; }
.usecase-page .guide-related ul { display: grid; gap: 16px; padding-left: 20px; }
.usecase-page .guide-related a { font-size: 19px; line-height: 1.5; text-underline-offset: 4px; }
.usecase-updated { display: block; color: var(--ink-soft); font-size: 13px; margin-bottom: 36px; }
.usecase-page .guide-contact .button { max-width: 100%; white-space: normal; text-align: center; }
.guide-main { width: min(1000px, calc(100% - 64px)); margin: 0 auto; }
.guide-breadcrumb { padding: 28px 0; color: var(--ink-soft); font-size: 14px; }
.guide-breadcrumb a { text-underline-offset: 4px; }
.guide-intro { max-width: 900px; padding: 32px 0 42px; }
.guide-intro h1 { max-width: 900px; font-size: clamp(38px, 4.5vw, 64px); line-height: 1.08; }
.guide-lead { margin: 28px 0 20px; font-size: clamp(19px, 2vw, 23px); line-height: 1.6; }
.guide-identity { max-width: 780px; color: var(--ink-soft); font-size: 16px; line-height: 1.65; }
.guide-intro time { display: block; margin-top: 24px; color: var(--ink-soft); font-size: 13px; }
.guide-toc { padding: 26px 30px; border: 1px solid var(--line); }
.guide-toc h2 { margin: 0 0 16px; font-family: var(--sans); font-size: 18px; }
.guide-toc ol { display: grid; gap: 12px; margin: 0; padding-left: 22px; }
.guide-toc a { display: inline-block; padding: 5px 0; line-height: 1.5; text-underline-offset: 4px; }
.guide-section { padding: 48px 0; border-bottom: 1px solid var(--line); scroll-margin-top: 24px; }
.guide-section h2, .guide-related h2, .guide-contact h2 { max-width: 850px; margin: 0 0 24px; font-family: var(--serif); font-size: clamp(28px, 3vw, 42px); line-height: 1.16; letter-spacing: -.02em; }
.guide-section > p, .guide-faq p, .guide-checklist, .guide-contact p { max-width: 780px; font-size: 18px; line-height: 1.7; }
.guide-section > p { margin: 18px 0; }
.guide-checklist { padding-left: 24px; }
.guide-checklist li { padding-left: 4px; margin: 14px 0; }
.guide-images { display: grid; gap: 24px; margin-top: 30px; align-items: start; }
.guide-images-1 { max-width: 460px; }
.guide-images-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); max-width: 820px; }
.guide-images-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.guide-images-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
.guide-images figure { margin: 0; }
.guide-images a { display: block; background: var(--paper-light); }
.guide-images img { width: 100%; height: auto; object-fit: contain; }
.guide-images-2 img, .guide-images-3 img { aspect-ratio: 4 / 5; }
.guide-facts { margin: 28px 0; border-top: 1px solid var(--line); }
.guide-facts > div { display: grid; grid-template-columns: minmax(140px, .7fr) minmax(0, 2fr); gap: 24px; padding: 20px 0; border-bottom: 1px solid var(--line); }
.guide-facts dt { font-weight: 600; line-height: 1.5; }
.guide-facts dd { margin: 0; color: var(--ink-soft); line-height: 1.65; }
@media (max-width: 700px) { .guide-facts > div { grid-template-columns: 1fr; gap: 8px; } }
.guide-images figcaption { margin-top: 12px; color: var(--ink-soft); font-size: 14px; line-height: 1.5; }
.guide-section > .text-link { display: inline-block; margin-top: 28px; font-size: 17px; }
.guide-faq > div + div { margin-top: 32px; }
.guide-faq h3 { margin: 0; font-family: var(--sans); font-size: 20px; line-height: 1.4; }
.guide-faq p { margin: 10px 0 0; }
.guide-related { padding: 36px 0; }
.guide-related h2 { margin-bottom: 12px; font-family: var(--sans); font-size: 18px; letter-spacing: 0; }
.guide-related > a { font-size: 21px; line-height: 1.6; text-underline-offset: 5px; }
.guide-contact { margin: 0 0 64px; padding: 34px; background: var(--paper-light); border: 1px solid var(--line); }
.guide-contact h2 { font-size: clamp(28px, 3vw, 38px); }
.guide-contact .button { margin-top: 12px; }
.guide-discovery { display: grid; grid-template-columns: .7fr 1fr; gap: 40px; width: var(--page); margin: 0 auto; padding: 52px 0; border-top: 1px solid var(--line); }
.guide-discovery h2 { margin: 0; font-family: var(--serif); font-size: clamp(28px, 3vw, 40px); line-height: 1.18; }
.guide-discovery-list { display: grid; gap: 24px; }
.guide-discovery-list a { display: inline-block; font-size: 19px; font-weight: 600; line-height: 1.4; text-underline-offset: 5px; }
.guide-discovery-list p { margin: 9px 0 0; color: var(--ink-soft); line-height: 1.65; }
@media (max-width: 700px) {
  .guide-main { width: calc(100% - 40px); }
  .guide-page .site-header { gap: 14px; flex-wrap: wrap; padding: 18px 0; }
  .guide-page .site-header nav { gap: 12px; margin-left: auto; }
  .guide-page .site-header .brand small { max-width: 175px; font-size: 9px; line-height: 1.4; }
  .guide-intro { padding-top: 16px; }
  .guide-toc { padding: 24px; }
  .guide-section { padding: 36px 0; }
  .guide-section > p, .guide-faq p, .guide-checklist, .guide-contact p { font-size: 17px; }
  .guide-images { gap: 16px; }
  .guide-images-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .guide-images-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .guide-contact { padding: 24px; }
  .guide-discovery { grid-template-columns: 1fr; gap: 28px; padding: 38px 0; }
}
@media (max-width: 420px) {
  .guide-images-2, .guide-images-3 { grid-template-columns: 1fr; }
  .guide-page .site-header .header-cta { padding: 12px; font-size: 12px; }
  .guide-page .site-header .brand b { font-size: 18px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }