:root {
  color-scheme: light;
  --spruce: #0e1a16;
  --pine: #1e6f53;
  --fog: #cdd8d2;
  --paper: #f3f5f1;
  --white: #ffffff;
  --line: #8b9e94;
  --serif: Georgia, "Times New Roman", serif;
  --sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

/* One utility sheet supplies the layout, type, spacing and colour. */
* { box-sizing: border-box; }
html { font-size: 16px; scroll-padding-top: 1rem; }
body { margin: 0; background: var(--paper); color: var(--spruce); font-family: var(--serif); font-size: 1.1875rem; line-height: 1.65; counter-reset: section; }
img { display: block; max-width: 100%; height: auto; }
button, input, textarea { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: default; opacity: .65; }
button, a, input, textarea { -webkit-tap-highlight-color: var(--fog); }
a { color: var(--pine); text-underline-offset: .2em; text-decoration-thickness: .08em; }
a:hover { text-decoration-thickness: .14em; }
a, button, input, textarea { touch-action: manipulation; }
:focus-visible { outline: 3px solid var(--pine); outline-offset: 4px; }
[hidden] { display: none !important; }
h1, h2, h3, p, figure, ul, ol { margin: 0; }
h1, h2, h3 { font-weight: 400; line-height: 1.14; text-wrap: balance; }
h1 { font-size: clamp(2.25rem, 4.2vw, 3.75rem); letter-spacing: -.035em; max-width: 22ch; }
h2 { font-size: clamp(1.7rem, 2.8vw, 2.35rem); letter-spacing: -.025em; }
h3 { font-size: 1.375rem; }
fieldset { min-width: 0; margin: 0; border: 1px solid var(--line); }
legend { padding: 0 .5rem; font-size: 1.25rem; }

.u-shell { width: min(100%, 1240px); margin-inline: auto; padding-inline: clamp(1.25rem, 4vw, 3rem); }
.u-text { max-width: 68ch; }
.u-stack > * + * { margin-top: 1rem; }
.u-stack-lg > * + * { margin-top: 1.75rem; }
.u-grid { display: grid; gap: 1.5rem; }
.u-grid-two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.u-flex { display: flex; flex-wrap: wrap; align-items: center; gap: .75rem; }
.u-pad { padding: clamp(1.25rem, 2.5vw, 2rem); }
.u-pad-sm { padding: 1.125rem; }
.u-border { border: 1px solid var(--line); }
.u-fog { background: var(--fog); color: var(--spruce); }
.u-paper { background: var(--paper); color: var(--spruce); }
.u-dark { background: var(--spruce); color: var(--paper); }
.u-label { font-family: var(--sans); font-size: 1rem; line-height: 1.45; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; }
.u-sans { font-family: var(--sans); }
.u-small { font-size: 1rem; }
.u-section { margin-block: clamp(2.75rem, 6vw, 4.75rem); }
.u-link { display: inline-flex; min-height: 48px; align-items: center; gap: .75rem; padding-block: .6rem; }
.u-button { display: inline-flex; min-height: 48px; min-width: 48px; justify-content: center; align-items: center; padding: .65rem 1rem; border: 1px solid var(--pine); background: var(--pine); color: var(--white); font: 1rem/1.4 var(--sans); text-decoration: none; }
.u-button:hover { background: var(--spruce); color: var(--white); border-color: var(--spruce); }
.u-button-quiet { color: var(--spruce); background: transparent; border-color: var(--line); }
.u-sr { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }

.skip__link { position: fixed; z-index: 10; top: .5rem; left: .5rem; transform: translateY(-180%); }
.skip__link:focus { transform: translateY(0); }
.masthead__inner { display: grid; grid-template-columns: minmax(200px, 1fr) minmax(460px, 1.9fr); gap: 2rem; align-items: center; padding-block: 1.5rem; }
.masthead__brand { display: inline-flex; min-height: 48px; width: fit-content; flex-direction: column; justify-content: center; color: var(--spruce); text-decoration: none; }
.masthead__name { font-size: 1.625rem; line-height: 1.2; }
.masthead__descriptor { font: 1rem/1.6 var(--sans); }
.topics__groups { display: grid; grid-template-columns: .85fr 1fr 1.1fr; gap: 1rem; }
.topics__group { border-left: 1px solid var(--line); padding-left: 1rem; }
.topics__label { display: block; margin-bottom: .25rem; font: 1rem/1.4 var(--serif); }
.topics__list { list-style: none; padding: 0; }
.topics__link { display: flex; align-items: center; min-height: 44px; padding: .5rem .3rem; margin-left: -.3rem; font: 1rem/1.3 var(--sans); color: var(--spruce); }
.topics__link[aria-current="page"] { font-weight: 700; text-decoration-thickness: .15em; text-decoration-color: var(--pine); }
.topics__link:hover { background: var(--fog); }

.hero__panel { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, .8fr); gap: 2.5rem; padding: clamp(1.5rem, 4vw, 3rem); border-top: 5px solid var(--pine); }
.hero__eyebrow { color: var(--fog); }
.hero__lead { max-width: 45ch; font-size: 1.375rem; line-height: 1.5; }
.hero__panel a { color: var(--paper); }
.hero__panel .u-button { color: var(--white); border-color: var(--fog); }
.hero__panel :focus-visible { outline-color: var(--fog); }
.hero__figure { align-self: center; }
.hero__image { width: 100%; aspect-ratio: 4 / 3; background: var(--fog); color: var(--spruce); border: 1px solid var(--line); object-fit: cover; font-size: 1rem; }
.hero__caption { padding-top: .75rem; color: var(--fog); font-size: 1rem; }
.page-head__panel { padding-block: 2rem 2.5rem; border-top: 5px solid var(--pine); border-bottom: 1px solid var(--line); }
.page-head__lead { font-size: 1.375rem; max-width: 54ch; line-height: 1.5; }

.section__heading { display: flex; gap: 1rem; align-items: baseline; padding-bottom: 1.25rem; border-bottom: 1px solid var(--line); }
.section__heading::before { counter-increment: section; content: counter(section, decimal-leading-zero); flex-shrink: 0; color: var(--pine); font: 1rem/1.4 var(--sans); letter-spacing: .08em; }
.section__content { padding-top: 1.5rem; }
.checks__list { list-style: none; padding: 0; }
.checks__item { position: relative; padding: 1.25rem 0 1.25rem 2.25rem; border-bottom: 1px solid var(--line); }
.checks__item::before { content: ""; position: absolute; left: 0; top: 1.65rem; width: 1rem; height: 1rem; border: 1px solid var(--pine); }
.checks__title { display: block; font-size: 1.3125rem; font-weight: 400; margin-bottom: .45rem; line-height: 1.3; }
.myth__assumption { padding: .8rem 1rem; border-left: 3px solid var(--spruce); background: var(--fog); }
.myth__label { display: block; font: 1rem/1.4 var(--sans); font-weight: 600; margin-bottom: .25rem; }
.myth__answer { margin-top: 1rem; }
.note__panel { border-left: 3px solid var(--pine); padding: 1rem 1.25rem; background: var(--white); }
.route__diagram { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border: 1px solid var(--line); }
.route__cell { padding: 1.25rem; }
.route__cell + .route__cell { border-left: 1px solid var(--line); }
.route__name { margin-bottom: .5rem; }
.path__list { list-style: none; padding: 0; }
.path__link { display: grid; grid-template-columns: 1fr auto; gap: 1rem; align-items: center; padding: 1.25rem 0; min-height: 64px; border-bottom: 1px solid var(--line); text-decoration: none; color: var(--spruce); }
.path__title { display: block; font-size: 1.375rem; color: var(--pine); text-decoration: underline; text-underline-offset: .2em; }
.path__note { display: block; margin-top: .4rem; font-size: 1.0625rem; }
.path__arrow { font: 1.5rem/1 var(--sans); }
.next__panel { display: flex; align-items: center; flex-wrap: wrap; justify-content: space-between; gap: 1.25rem; padding-block: 1.5rem; border-top: 2px solid var(--pine); }

.questions__group { padding: .5rem 1rem 1rem; }
.questions__label { display: flex; align-items: flex-start; gap: 1rem; min-height: 64px; padding: .9rem .3rem; border-bottom: 1px solid var(--line); cursor: pointer; }
.questions__label:last-child { border-bottom: 0; }
.questions__label:hover { background: var(--fog); }
.questions__input { flex: 0 0 40px; width: 40px; height: 40px; margin: .25rem 0 0; accent-color: var(--pine); cursor: pointer; }
.questions__label:has(input:checked) { background: var(--fog); }
.questions__actions { margin-top: 1.5rem; }
.questions__output { width: 100%; min-height: 11rem; border: 1px solid var(--line); resize: vertical; padding: 1rem; color: var(--spruce); background: var(--white); font-size: 1rem; line-height: 1.6; }
.questions__status { min-height: 1.65em; font-size: 1rem; }
.questions__print { display: none; }
.sources__list { list-style: none; padding: 0; }
.sources__item { padding-block: 1.125rem; border-bottom: 1px solid var(--line); }
.sources__link { display: flex; width: fit-content; max-width: 100%; min-height: 48px; align-items: center; padding-block: .65rem; font-size: 1.125rem; overflow-wrap: anywhere; }
.sources__note { font-size: 1.0625rem; max-width: 68ch; }
.footer__inner { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); gap: 2rem; padding-block: 2.5rem; border-top: 1px solid var(--line); font-size: 1rem; }
.footer__links { display: flex; flex-wrap: wrap; align-content: start; gap: .5rem 1.5rem; }
.footer__statement { max-width: 62ch; }

@media (max-width: 850px) {
  .masthead__inner { grid-template-columns: 1fr; gap: 1.25rem; }
  .hero__panel { grid-template-columns: 1fr; gap: 2rem; }
  .hero__figure { max-width: 400px; }
  .u-grid-two { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  body { font-size: 1.0625rem; }
  .u-shell { padding-inline: 1.25rem; }
  .topics__groups { grid-template-columns: .8fr 1fr 1.15fr; gap: .5rem; }
  .topics__group { padding-left: .6rem; }
  .hero__panel { padding: 1.5rem; }
  .hero__lead, .page-head__lead { font-size: 1.1875rem; }
  .route__diagram { grid-template-columns: 1fr; }
  .route__cell + .route__cell { border-left: 0; border-top: 1px solid var(--line); }
  .footer__inner { grid-template-columns: 1fr; gap: 1rem; }
  .questions__group { padding-inline: .75rem; }
  .questions__actions > button { width: 100%; }
  .section__heading { gap: .75rem; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation: none !important; transition: none !important; }
}
@media print {
  body { font-size: 16px; background: white; color: black; }
  .masthead__inner, .footer__inner, .skip__link, .questions__actions, .next__panel, .questions__noscript { display: none; }
  .u-shell { width: 100%; padding: 0; }
  .hero__panel { color: black; background: white; }
  a { color: black; }
  fieldset, .checks__item, .sources__item { break-inside: avoid; }
  body.questions--printing main > :not(.questions__print) { display: none; }
  body.questions--printing .questions__print { display: block; }
  .questions__print-list { padding-left: 1.5rem; }
  .questions__print-list li { padding-block: .5rem; }
}