/* Shared reading surfaces: Guides, Downloads, and their detail pages. */
.resource-page {
  color-scheme: light;
  --bg: #fff;
  --surface: #f7f7f6;
  --surface-2: #efefed;
  --border: #dededb;
  --border-strong: #a7a7a3;
  --ink: #252525;
  --muted: #5d5d59;
  --faint: #666662;
  --primary: #252525;
  --on-primary: #fff;
  --agent-send: #2854df;
  --on-agent-send: #fff;
  --keycap-edge: #b0b0ad;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-size: 1rem;
  scrollbar-color: var(--border-strong) var(--surface);
}
.resource-page a { text-underline-offset: .2em; }
.resource-page :where(a, button, input, select, summary):focus-visible { outline: 2px solid var(--agent-send); outline-offset: 4px; }
.resource-page [hidden] { display: none !important; }
.resource-page input { caret-color: var(--agent-send); }
.resource-page .masthead { background: var(--bg); backdrop-filter: none; border-bottom: 1px solid var(--border); }
.resource-page .masthead a.link { font-family: var(--font-body); font-size: .875rem; }
.resource-page .masthead .wrap, .resource-shell { width: min(100% - 3rem, 1120px); margin-inline: auto; }
.resource-page :is(.skip-link,.resource-skip) { position: fixed; left: 1rem; top: -5rem; z-index: 50; padding: .8rem 1rem; background: var(--ink); color: #fff; }
.resource-page :is(.skip-link,.resource-skip):focus { top: 1rem; }
.resource-main { flex: 1; padding-block: clamp(3rem, 7vw, 6.5rem) 5rem; }
.resource-intro { max-width: 850px; margin-bottom: clamp(3rem, 6vw, 5.5rem); }
.resource-intro h1 { margin: 0; font: 500 clamp(2.65rem, 5.8vw, 4.65rem)/1.08 var(--font-body); letter-spacing: -.035em; text-wrap: balance; }
.resource-intro > p, .resource-lead { max-width: 62ch; margin: 1.5rem 0 0; font-size: clamp(1.125rem, 1.7vw, 1.35rem); line-height: 1.6; color: var(--muted); }
.resource-breadcrumb { display: flex; flex-wrap: wrap; gap: .55rem; font-size: .875rem; color: var(--muted); margin-bottom: 2rem; }
.resource-breadcrumb a { color: inherit; }
.resource-meta { display: flex; flex-wrap: wrap; align-items: center; gap: .6rem 1rem; color: var(--muted); font-size: .875rem; }
.resource-meta a { color: inherit; }
.resource-tags { display: flex; flex-wrap: wrap; gap: .5rem; margin: 1.5rem 0; }
.resource-tags > :is(span,a) { display: inline-flex; align-items: center; min-height: 1.8rem; padding: .2rem .65rem; border-radius: 4px; background: var(--surface-2); color: var(--muted); text-decoration: none; font-size: .75rem; }
.resource-tags > a:hover { color: var(--ink); text-decoration: underline; }
.resource-button { display: inline-flex; align-items: center; justify-content: center; gap: .75rem; min-height: 2.9rem; padding: .7rem 1.1rem; border: 1px solid transparent; border-radius: 6px; font: 500 .9375rem/1.3 var(--font-body); color: var(--on-agent-send); background: var(--agent-send); text-decoration: none; cursor: pointer; transition: background-color 180ms var(--ease-out), border-color 180ms var(--ease-out); }
.resource-button:hover { background: #2045ba; }
.resource-button--secondary { background: transparent; color: var(--ink); border-color: var(--border-strong); }
.resource-button--secondary:hover { background: var(--surface); border-color: var(--ink); }
.resource-button:disabled { opacity: .55; cursor: wait; }
.resource-note { margin-block: 2rem; padding: 1.5rem; background: var(--surface); border-radius: 8px; }
.resource-note > :first-child { margin-top: 0; }
.resource-note > :last-child { margin-bottom: 0; }
.resource-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 2.5rem; list-style: none; padding: 0; margin: 2rem 0; }
.resource-card { height: 100%; padding-block: 1.75rem; border-top: 1px solid var(--border); display: flex; flex-direction: column; }
.resource-card-body { flex: 1; }
.resource-card-title { margin: 1rem 0; font: 500 clamp(1.5rem,2.5vw,2rem)/1.25 var(--font-body); letter-spacing: -.025em; text-wrap: balance; }
.resource-card-title a { color: inherit; text-decoration: none; }
.resource-card-title a:hover { text-decoration: underline; text-decoration-thickness: 1px; }
.resource-card-description { max-width: 65ch; color: var(--muted); }
.resource-card-footer { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1rem; padding-top: 1.5rem; }
.resource-detail-header { max-width: 930px; padding-bottom: clamp(3rem,6vw,5rem); }
.resource-detail-header h1 { margin: 1rem 0 1.5rem; font: 500 clamp(2.3rem,4.8vw,3.8rem)/1.13 var(--font-body); letter-spacing: -.035em; text-wrap: balance; }
.resource-detail-layout { display: grid; grid-template-columns: minmax(0,1fr) 280px; gap: clamp(2rem,6vw,5rem); align-items: start; }
.resource-prose { min-width: 0; max-width: 72ch; font-size: 1.075rem; line-height: 1.8; }
.resource-prose :is(h2,h3,h4) { font-family: var(--font-body); font-weight: 500; color: var(--ink); text-wrap: balance; scroll-margin-top: 6rem; }
.resource-prose h2 { margin: 3.5rem 0 1rem; font-size: clamp(1.7rem,3vw,2.2rem); line-height: 1.25; letter-spacing: -.025em; }
.resource-prose h3 { margin: 2.4rem 0 .8rem; font-size: 1.35rem; line-height: 1.35; letter-spacing: -.015em; }
.resource-prose > :first-child { margin-top: 0; }
.resource-prose p { margin: 1rem 0; }
.resource-prose :is(ul,ol) { padding-left: 1.4rem; }
.resource-prose li { margin-block: .65rem; }
.resource-prose a { color: var(--agent-send); }
.resource-prose code { font-family: var(--font-display); font-size: .83em; background: var(--surface); padding: .15em .3em; border-radius: 3px; overflow-wrap: anywhere; }
.resource-prose pre { max-width: 100%; overflow-x: auto; padding: 1.4rem; background: var(--surface); border-radius: 8px; font-size: .875rem; line-height: 1.7; }
.resource-prose pre code { padding: 0; background: transparent; font-size: inherit; }
.resource-prose blockquote { margin: 2rem 0; padding: 1.5rem; background: var(--surface); border-radius: 8px; }
.resource-prose blockquote > :first-child { margin-top: 0; }
.resource-prose blockquote > :last-child { margin-bottom: 0; }
.resource-prose table { width: 100%; border-collapse: collapse; font-size: .9375rem; }
.resource-prose :is(td,th) { padding: 1rem .75rem; text-align: left; vertical-align: top; border-bottom: 1px solid var(--border); }
.resource-prose th { font-weight: 500; }
.resource-aside { position: sticky; top: 7rem; font-size: .9375rem; color: var(--muted); }
.resource-aside h2 { color: var(--ink); font: 500 1rem/1.4 var(--font-body); margin: 0 0 1rem; }
.resource-toc { list-style: none; margin: 0; padding: 0; }
.resource-toc li { margin: .8rem 0; }
.resource-toc a { color: inherit; text-decoration: none; }
.resource-toc a:hover { color: var(--ink); text-decoration: underline; }
.resource-figure { margin: 2.5rem 0; }
.resource-figure img, .resource-prose img { display: block; width: 100%; height: auto; }
.resource-figure figcaption, .resource-prose figcaption { margin-top: .85rem; color: var(--muted); font-size: .875rem; line-height: 1.5; }
.resource-page .resource-footer { display: flex; align-items: center; flex-wrap: wrap; gap: 1.5rem; padding-block: 2rem; border-top: 1px solid var(--border); font-size: .875rem; }
.resource-footer > .logo { margin-right: auto; }
.resource-footer a { color: var(--muted); }
.resource-footer nav { display: flex; flex-wrap: wrap; gap: 1.5rem; }
/* The library is an editorial feature, with one complete diagram rather than filler cards. */
.guide-filters { display: flex; flex-wrap: wrap; gap: 1rem; padding-bottom: 1.5rem; border-bottom: 1px solid var(--border); align-items: end; }
.guide-filter { display: grid; gap: .45rem; font-size: .8125rem; color: var(--muted); }
.guide-filter:first-child { flex: 1; min-width: 220px; }
.guide-filter :is(input,select) { height: 2.8rem; min-width: 150px; max-width: 100%; padding: .6rem .85rem; color: var(--ink); background: #fff; border: 1px solid var(--border); border-radius: 5px; font: 400 .9375rem var(--font-body); }
.guide-filter input::placeholder { color: var(--muted); opacity: 1; }
.guide-filter select { padding-right: 2rem; }
.guide-results-count { margin: 1.25rem 0 2rem; font-size: .875rem; color: var(--muted); }
.guide-feature { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem,5vw,4.5rem); align-items: center; padding-block: .5rem 3rem; }
.guide-feature h2 { margin: 1rem 0 1.25rem; font: 500 clamp(1.75rem,3.1vw,2.6rem)/1.2 var(--font-body); letter-spacing: -.025em; text-wrap: balance; }
.guide-feature h2 a { color: var(--ink); text-decoration: none; }
.guide-feature h2 a:hover { text-decoration: underline; text-decoration-thickness: 1px; }
.guide-feature-description { margin: 0; color: var(--muted); font-size: 1.075rem; max-width: 55ch; }
.guide-feature-link { align-self: flex-start; margin-top: .35rem; }
.guide-feature-link svg { transition: transform 240ms var(--ease-out); }
.guide-feature-link:hover svg { transform: translateX(4px); }
.guide-feature-art { background: var(--surface); border-radius: 12px; padding: clamp(1.5rem,3vw,2.5rem); margin: 0; }
.guide-feature-art > p { margin: 0 0 2rem; font-size: .9375rem; color: var(--muted); }
.guide-methods { margin: 0; padding: 0; list-style: none; counter-reset: methods; }
.guide-methods li { counter-increment: methods; position: relative; display: grid; grid-template-columns: 2.5rem 1fr; align-items: baseline; gap: 1rem; padding-block: 1.1rem; border-top: 1px solid var(--border); }
.guide-methods li::before { content: counter(methods, decimal-leading-zero); font: 400 .875rem var(--font-display); color: var(--muted); }
.guide-methods strong { display: block; font-size: 1.125rem; font-weight: 500; }
.guide-methods span { display: block; color: var(--muted); font-size: .8125rem; margin-top: .25rem; }
.guide-empty { padding-block: 2rem 4rem; }
.guide-empty h2 { font-size: 1.5rem; font-weight: 500; }
.guide-library-close { display: flex; align-items: center; justify-content: space-between; gap: 2rem; margin-top: 3rem; padding-top: 2.5rem; border-top: 1px solid var(--border); }
.guide-library-close h2 { font: 500 1.35rem/1.3 var(--font-body); margin: 0 0 .5rem; }
.guide-library-close p { margin: 0; color: var(--muted); }
@media (max-width: 800px) {
  .resource-detail-layout { grid-template-columns: 1fr; }
  .resource-aside { position: static; }
  .guide-feature { gap: 2rem; }
}
@media (max-width: 640px) {
  .resource-page .masthead .wrap, .resource-shell { width: min(100% - 2rem,1120px); }
  .resource-page .masthead .wrap { flex-wrap: wrap; gap: .15rem 1rem; }
  .resource-page .masthead-nav { gap: 1rem; }
  .resource-page .masthead a.link { font-size: .8125rem; }
  .resource-grid, .guide-feature { grid-template-columns: 1fr; }
  .guide-filter:first-child { flex-basis: 100%; }
  .guide-filter:not(:first-child) { flex: 1; min-width: 0; }
  .guide-filter :is(input,select) { width: 100%; min-width: 0; }
  .guide-library-close { align-items: flex-start; flex-direction: column; }
  .resource-footer { gap: 1rem; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .resource-page *, .resource-page *::before, .resource-page *::after { animation: none !important; transition: none !important; }
}