/* Proofler: a monochrome working library with one signal red. Pico 2.1.1. */
:root {
  color-scheme: light;
  --xfa4a-black: #111111;
  --xfa4a-white: #ffffff;
  --xfa4a-red: #c91f27;
  --xfa4a-muted: #505050;
  --xfa4a-serif: Georgia, 'Times New Roman', Times, serif;
  --xfa4a-sans: Arial, Helvetica, sans-serif;
  --pico-font-family: var(--xfa4a-serif);
  --pico-font-size: 18px;
  --pico-line-height: 1.65;
  --pico-background-color: var(--xfa4a-white);
  --pico-color: var(--xfa4a-black);
  --pico-primary: var(--xfa4a-red);
  --pico-primary-hover: var(--xfa4a-black);
  --pico-border-radius: 0;
  --pico-spacing: 1rem;
  --pico-typography-spacing-vertical: 1rem;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body { margin: 0; background: #fff; color: #111; font-family: var(--xfa4a-serif); font-size: 18px; line-height: 1.65; }
body > header, body > main, body > footer { width: 100%; max-width: 1440px; margin: 0 auto; padding: 0; }
h1, h2, h3 { color: inherit; font-family: var(--xfa4a-serif); font-weight: 400; text-wrap: pretty; }
h1 { margin: 0; font-size: clamp(2.5rem, 4.6vw, 4.2rem); line-height: 1.04; letter-spacing: -.045em; }
h2 { margin: 0; font-size: clamp(1.8rem, 2.6vw, 2.5rem); line-height: 1.12; letter-spacing: -.035em; }
h3 { margin: 0 0 12px; font-size: 1.35rem; line-height: 1.25; letter-spacing: -.02em; }
/* Inherit panel text colors instead of Pico's automatic theme colors. */
p { margin: 0 0 1.1rem; color: inherit; }
ol, ul { color: inherit; }
a { color: inherit; text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 4px; }
a:hover { color: var(--xfa4a-red); }
a:focus-visible { outline: 3px solid var(--xfa4a-red); outline-offset: 5px; }
a, p, h1, h2, h3, li, td, th { overflow-wrap: break-word; }
img { max-width: 100%; height: auto; }
nav, nav ul { margin: 0; padding: 0; }
section, article, aside { margin: 0; padding: 0; }
.xfa4a-skip { position: fixed; top: 12px; left: 12px; z-index: 20; padding: 12px 20px; background: #fff; color: #111; transform: translateY(-180%); font-family: var(--xfa4a-sans); }
.xfa4a-skip:focus { transform: translateY(0); }
/* Wide masthead; navigation is a separate row of squared, ruled tabs. */
body > .xfa4a-masthead { background: #111; color: #fff; padding: 34px 48px 0; border-top: 8px solid var(--xfa4a-red); }
.xfa4a-wordmark { display: inline-flex; gap: 12px; align-items: center; color: inherit; font-family: var(--xfa4a-serif); font-size: 2.6rem; font-weight: 700; line-height: 1; letter-spacing: -.07em; text-decoration: none; }
.xfa4a-wordmark:hover { color: inherit; }
.xfa4a-monogram { display: inline-grid; place-items: center; width: 35px; height: 39px; margin-right: 6px; background: var(--xfa4a-red); color: #fff; font-size: 1.55rem; letter-spacing: -.06em; }
.xfa4a-period { color: var(--xfa4a-red); margin-left: -12px; }
.xfa4a-navigation { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); margin-top: 34px; border: 1px solid #fff; border-bottom: 0; font-family: var(--xfa4a-sans); }
.xfa4a-navigation a { display: flex; align-items: center; justify-content: center; min-height: 53px; margin: 0; padding: 10px; border-radius: 0; border-right: 1px solid #fff; color: #fff; font-size: .75rem; font-weight: 700; text-decoration: none; }
.xfa4a-navigation a:last-child { border-right: 0; }
.xfa4a-navigation a:hover, .xfa4a-navigation .xfa4a-current { background: #fff; color: #111; }
.xfa4a-navigation a[aria-current] { box-shadow: inset 0 -4px var(--xfa4a-red); }
/* The title and its brief occupy two equal architectural panels. */
.xfa4a-intro { display: grid; grid-template-columns: 1fr 1fr; border-bottom: 3px solid #111; }
.xfa4a-intro-title { background: #111; color: #fff; padding: 64px 48px 72px; min-width: 0; }
.xfa4a-label { margin: 0 0 24px; color: var(--xfa4a-red); font-family: var(--xfa4a-sans); font-size: .65rem; font-weight: 700; line-height: 1.5; letter-spacing: .1em; text-transform: uppercase; }
.xfa4a-intro-title .xfa4a-label { color: #fff; padding-left: 15px; border-left: 5px solid var(--xfa4a-red); }
.xfa4a-intro-detail { display: flex; flex-direction: column; justify-content: center; align-items: flex-start; padding: 64px 48px; min-width: 0; }
.xfa4a-summary { max-width: 32em; margin: 0; font-size: 1.24rem; line-height: 1.55; }
.xfa4a-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.xfa4a-button { display: inline-flex; align-items: center; justify-content: center; gap: 12px; max-width: 100%; margin: 0; padding: 13px 19px; border: 2px solid #111; background: #111; color: #fff; font-family: var(--xfa4a-sans); font-size: .72rem; font-weight: 700; line-height: 1.5; text-align: center; text-decoration: none; }
.xfa4a-button:hover { color: #fff; background: var(--xfa4a-red); border-color: var(--xfa4a-red); }
.xfa4a-outline { background: #fff; color: #111; }
.xfa4a-crumbs { display: flex; justify-content: flex-start; flex-wrap: wrap; gap: 8px 12px; padding: 14px 48px; border-bottom: 1px solid #111; font-family: var(--xfa4a-sans); font-size: .65rem; }
.xfa4a-crumbs a { margin: 0; padding: 0; border-radius: 0; }
/* Every body section has a fixed heading rail and a generous working column. */
.xfa4a-split { display: grid; grid-template-columns: minmax(0, 36%) minmax(0, 64%); border-bottom: 1px solid #111; }
.xfa4a-section-heading { padding: 52px 38px 52px 48px; border-right: 1px solid #111; }
.xfa4a-section-heading h2 { max-width: 12em; }
.xfa4a-section-body { min-width: 0; padding: 52px 48px; }
.xfa4a-section-body > :last-child, .xfa4a-entry > :last-child, .xfa4a-copy > :last-child { margin-bottom: 0; }
.xfa4a-copy { max-width: 42em; }
.xfa4a-entries { display: grid; grid-template-columns: 1fr; }
.xfa4a-entry { min-width: 0; padding: 28px 0; border-top: 1px solid #111; }
.xfa4a-entry:first-child { border-top: 0; padding-top: 0; }
.xfa4a-entry:last-child { padding-bottom: 0; }
.xfa4a-entry .xfa4a-label { margin-bottom: 10px; }
.xfa4a-entry h3 a { text-decoration: none; }
.xfa4a-more { display: inline-block; font-family: var(--xfa4a-sans); font-size: .72rem; font-weight: 700; }
.xfa4a-more span { margin-left: 8px; color: var(--xfa4a-red); }
.xfa4a-entries > div:not(.xfa4a-entry) { padding: 24px 0; border-top: 1px solid #111; }
.xfa4a-entries > div:not(.xfa4a-entry):first-child { padding-top: 0; border-top: 0; }
.xfa4a-space, .xfa4a-closing { margin-top: 28px; }
.xfa4a-section-body > .xfa4a-space:first-child, .xfa4a-section-body > .xfa4a-closing:first-child { margin-top: 0; }
.xfa4a-feature .xfa4a-section-heading { background: var(--xfa4a-red); color: #fff; }
.xfa4a-feature .xfa4a-label { color: #fff; }
.xfa4a-checklist { margin-top: 32px; padding: 28px; background: #111; color: #fff; }
.xfa4a-checklist-title { font-family: var(--xfa4a-sans); font-size: .68rem; letter-spacing: .06em; text-transform: uppercase; }
.xfa4a-checklist ol { margin: 22px 0; padding-left: 24px; }
.xfa4a-checklist li { padding: 8px 0 8px 6px; border-bottom: 1px solid #777; }
.xfa4a-checklist li span { font-weight: 700; }
.xfa4a-checklist p { margin: 0; font-size: .9rem; }
.xfa4a-steps { margin: 0; padding: 0; list-style: none; counter-reset: xfa4a-step; }
.xfa4a-steps li { position: relative; padding: 0 0 28px 56px; margin: 0 0 28px; border-bottom: 1px solid #111; counter-increment: xfa4a-step; }
.xfa4a-steps li::before { content: counter(xfa4a-step, decimal-leading-zero); position: absolute; left: 0; top: 0; color: var(--xfa4a-red); font-family: var(--xfa4a-sans); font-weight: 700; font-size: .8rem; }
.xfa4a-steps li:last-child { margin-bottom: 0; padding-bottom: 0; border-bottom: 0; }
.xfa4a-steps p { margin-bottom: 0; }
.xfa4a-table { margin-top: 30px; }
table { width: 100%; margin: 0; border-collapse: collapse; font-size: .86rem; line-height: 1.5; }
caption { padding-bottom: 16px; color: var(--xfa4a-muted); font-family: var(--xfa4a-sans); font-size: .65rem; text-align: left; }
th, td { padding: 18px 12px; border: 1px solid #111; background: #fff; color: #111; text-align: left; vertical-align: top; }
thead th { background: #111; color: #fff; font-family: var(--xfa4a-sans); font-size: .7rem; }
/* The dated guide shares the split system; its index stays in document flow. */
.xfa4a-index { display: flex; flex-direction: column; align-items: flex-start; padding: 44px 38px 44px 48px; border-right: 1px solid #111; font-family: var(--xfa4a-sans); }
.xfa4a-index .xfa4a-label { margin-bottom: 15px; }
.xfa4a-index a { display: block; margin: 0; padding: 10px 0; font-size: .75rem; }
.xfa4a-updated { font-family: var(--xfa4a-sans); color: var(--xfa4a-muted); font-size: .68rem; }
.xfa4a-notice { border: 2px solid #111; border-top: 6px solid var(--xfa4a-red); padding: 24px; margin: 24px 0; }
.xfa4a-notice strong { font-family: var(--xfa4a-sans); font-size: .8rem; }
.xfa4a-notice p { margin: 12px 0 0; }
.xfa4a-section-body > ol:not(.xfa4a-steps) { padding-left: 25px; margin: 0 0 28px; }
.xfa4a-section-body > ol:not(.xfa4a-steps) li { padding-left: 8px; margin-bottom: 14px; }
.xfa4a-section-body > h3 { margin-top: 30px; }
.xfa4a-section-body > h3:first-child { margin-top: 0; }
body > .xfa4a-footer { display: grid; grid-template-columns: 1fr 1fr; background: #111; color: #fff; border-top: 7px solid var(--xfa4a-red); padding: 48px 48px 24px; gap: 36px; }
.xfa4a-footer .xfa4a-wordmark { font-size: 2.8rem; }
.xfa4a-footer-copy { margin: 20px 0 0; font-size: .9rem; }
.xfa4a-footer-links { display: grid; grid-template-columns: 1fr; align-content: start; justify-items: start; gap: 10px; font-family: var(--xfa4a-sans); }
.xfa4a-footer-links a { display: inline; padding: 0; margin: 0; color: #fff; font-size: .72rem; }
.xfa4a-footer-links a:hover { text-decoration-thickness: 3px; }
.xfa4a-footer small { grid-column: 1 / -1; border-top: 1px solid #777; padding-top: 22px; font-family: var(--xfa4a-sans); font-size: .62rem; }
@media (min-width: 1441px) { body { background: #111; } .xfa4a-main { background: #fff; } }
@media (max-width: 900px) {
  h1 { font-size: 2.6rem; }
  body > .xfa4a-masthead { padding: 28px 28px 0; }
  .xfa4a-intro-title, .xfa4a-intro-detail { padding: 48px 28px; }
  .xfa4a-section-heading, .xfa4a-index { padding: 36px 28px; }
  .xfa4a-section-body { padding: 36px 28px; }
  .xfa4a-crumbs { padding-left: 28px; padding-right: 28px; }
  .xfa4a-summary { font-size: 1.05rem; }
  body > .xfa4a-footer { padding: 40px 28px 24px; }
}
@media (max-width: 640px) {
  body { font-size: 17px; }
  body > .xfa4a-masthead { padding: 24px 20px 0; }
  .xfa4a-wordmark { font-size: 2.5rem; }
  .xfa4a-navigation { grid-template-columns: repeat(6, minmax(0, 1fr)); margin-top: 24px; }
  .xfa4a-navigation a { grid-column: span 2; font-size: .62rem; padding: 10px 5px; min-height: 46px; }
  .xfa4a-navigation a:nth-child(3) { border-right: 0; }
  .xfa4a-navigation a:nth-child(n+4) { grid-column: span 3; border-top: 1px solid #fff; }
  .xfa4a-intro, .xfa4a-split { grid-template-columns: minmax(0, 1fr); }
  .xfa4a-intro-title { padding: 42px 20px; }
  h1 { font-size: clamp(2.35rem, 9.5vw, 3rem); }
  h2 { font-size: 1.9rem; }
  .xfa4a-intro-detail { padding: 30px 20px 36px; }
  .xfa4a-summary { font-size: 1.1rem; }
  .xfa4a-label { font-size: .6rem; margin-bottom: 18px; }
  .xfa4a-section-heading, .xfa4a-index { padding: 28px 20px; border-right: 0; border-bottom: 1px solid #111; }
  .xfa4a-section-heading h2 { max-width: 100%; }
  .xfa4a-section-body { padding: 30px 20px 36px; }
  .xfa4a-actions { gap: 10px; width: 100%; margin-top: 24px; }
  .xfa4a-actions .xfa4a-button { width: 100%; }
  .xfa4a-crumbs { padding: 12px 20px; font-size: .58rem; }
  .xfa4a-checklist, .xfa4a-notice { padding: 20px; }
  .xfa4a-steps li { padding-left: 40px; }
  table { font-size: .76rem; }
  th, td { padding: 12px 7px; }
  thead th { font-size: .6rem; }
  body > .xfa4a-footer { grid-template-columns: 1fr; padding: 36px 20px 22px; gap: 28px; }
  .xfa4a-footer-links { gap: 14px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }