@font-face {
  font-family: "PT Sans";
  src: url("/media/fonts/pt-sans-regular.woff") format("woff");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "PT Sans";
  src: url("/media/fonts/pt-sans-bold.woff") format("woff");
  font-style: normal;
  font-weight: 700;
  font-display: swap;
}

@font-face {
  font-family: "PT Sans Caption";
  src: url("/media/fonts/pt-sans-caption-bold.woff") format("woff");
  font-style: normal;
  font-weight: 700;
  font-display: swap;
}

:root {
  color-scheme: dark;
  --black: #000000;
  --panel: #1a1a1a;
  --cyan: #00bcd4;
  --white: #ffffff;
  --copy: #e0e0e0;
  --line: #333333;
  --muted: #b4b4b4;
  --body: "PT Sans", Arial, sans-serif;
  --display: "PT Sans Caption", "PT Sans", Arial, sans-serif;
  --technical: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

html {
  background: var(--black);
  scroll-padding-top: 1rem;
}

body {
  margin: 0;
  color: var(--copy);
  background: var(--black);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}

[hidden] { display: none !important; }

button, input { font: inherit; }

button, a, input { -webkit-tap-highlight-color: transparent; }

a { color: inherit; text-underline-offset: 0.22em; }

a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: 5px;
}

a:hover { color: var(--white); }

::selection { background: var(--cyan); color: var(--black); }

h1, h2, h3, p { margin: 0; }

h1, h2, h3 {
  color: var(--white);
  font-family: var(--display);
  font-weight: 700;
  line-height: 1.25;
  overflow-wrap: break-word;
}

h1 {
  font-size: 2.25rem;
  letter-spacing: -0.055em;
}

h2 { font-size: 1.5rem; letter-spacing: -0.035em; }
h3 { font-size: 1.125rem; }

p, li { max-width: 72ch; }

.technical-value { font-family: var(--technical); font-size: 1em; font-variant-numeric: tabular-nums; }

p + p { margin-top: 1rem; }

.site-shell { width: calc(100% - 40px); max-width: 1240px; margin-inline: auto; }

.site-header { padding-block: 24px 0; border-bottom: 1px solid var(--line); }

.header-row { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding-bottom: 24px; }

.site-name {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 52px;
  color: var(--white);
  font-family: var(--display);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.15;
  text-decoration: none;
}

.site-bracket { color: var(--cyan); font-family: var(--technical); font-size: 1.75rem; font-weight: 700; letter-spacing: -0.1em; }

.header-note { max-width: 15ch; text-align: right; color: var(--muted); font-size: 16px; line-height: 1.4; }

.question-tabs { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0; margin-inline: -1px; }

.question-tab {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 54px;
  padding: 12px 8px;
  text-decoration: none;
  color: var(--copy);
  font-size: 16px;
  line-height: 1.35;
  border-top: 1px solid var(--line);
}

.question-tab:nth-child(odd) { border-right: 1px solid var(--line); padding-left: 0; }
.question-tab:nth-child(even) { padding-left: 16px; }

.question-tab::after {
  content: "";
  position: absolute;
  inset: auto 0 -1px;
  height: 3px;
  background: var(--cyan);
  transform-origin: left;
  transform: scaleX(0);
  transition: transform 160ms ease;
}

.question-tab:hover::after, .question-tab:focus-visible::after, .question-tab.is-current-group::after { transform: scaleX(1); }
.question-tab.is-current-group { color: var(--cyan); }

.eyebrow { display: block; color: var(--cyan); font-family: var(--technical); font-size: 16px; font-weight: 400; line-height: 1.5; }

.home-composition { display: grid; gap: 44px; padding-top: 42px; }
.home-intro h1 { margin-top: 20px; font-size: clamp(2.5rem, 7vw, 4rem); max-width: 14ch; line-height: 1.12; }
.lead { color: var(--copy); font-size: 1.25rem; line-height: 1.6; max-width: 54ch; }
.home-intro .lead { margin-top: 24px; }

.badge-group { display: flex; flex-wrap: wrap; gap: 8px; margin-block: 24px 32px; }
.badge-group span { border: 1px solid var(--line); color: var(--copy); padding: 5px 9px; font-family: var(--technical); font-size: 16px; line-height: 1.6; }

.reader-callout { border-left: 3px solid var(--cyan); padding: 24px 20px; background: var(--panel); }
.reader-callout h2 { margin-bottom: 16px; font-size: 1.25rem; }
.reader-callout p { max-width: 66ch; }

.home-intro .reader-callout { margin-bottom: 24px; }

.primary-route {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  min-height: 56px;
  padding: 14px 18px;
  background: var(--cyan);
  color: var(--black);
  font-size: 16px;
  font-weight: 700;
  text-decoration: none;
}
.primary-route:hover { color: var(--black); background: var(--white); }

.route-gallery { display: grid; grid-template-columns: minmax(0, 1fr); gap: 16px; min-width: 0; }
.gallery-heading { padding-bottom: 8px; }
.gallery-heading h2 { margin-top: 8px; font-size: 1.5rem; }

.route-project {
  display: flex;
  flex-direction: column;
  position: relative;
  padding: 24px;
  min-height: 260px;
  background: var(--panel);
  border: 1px solid var(--line);
  text-decoration: none;
  transition: border-color 160ms ease, background-color 160ms ease;
}
.route-project:hover { border-color: var(--cyan); background: #202020; }
.route-project h3 { margin-block: 22px 12px; font-size: 1.5rem; line-height: 1.25; letter-spacing: -0.04em; }
.route-project p { color: var(--copy); font-size: 16px; line-height: 1.6; margin-bottom: 24px; }
.route-tag { align-self: flex-start; color: var(--cyan); font-family: var(--technical); font-size: 16px; line-height: 1.5; }
.route-open { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: auto; color: var(--copy); font-size: 16px; border-top: 1px solid var(--line); padding-top: 12px; }
.route-open > span { font-family: var(--technical); color: var(--cyan); font-size: 1.5rem; }
.gallery-tail { display: flex; align-items: center; gap: 20px; padding: 16px 0; color: var(--muted); }
.gallery-tail > span { color: var(--cyan); font-family: var(--technical); font-size: 2rem; flex-shrink: 0; }
.gallery-tail p { font-size: 16px; }

.home-bottom { display: grid; gap: 28px; margin-block: 56px; padding-top: 32px; border-top: 1px solid var(--line); }
.home-bottom h2 { margin-bottom: 16px; }
.quiet-callout { background: var(--panel); padding: 24px; }
.quiet-callout h2 { font-size: 1.25rem; }
.quiet-callout a { display: inline-flex; min-height: 44px; align-items: center; color: var(--cyan); margin-top: 8px; font-size: 16px; }

.breadcrumb { display: flex; align-items: center; flex-wrap: wrap; column-gap: 12px; row-gap: 0; margin-block: 24px; color: var(--muted); font-size: 16px; }
.breadcrumb a { display: inline-flex; align-items: center; min-width: 44px; min-height: 44px; }
.breadcrumb > span:last-child { max-width: 100%; }

.article-layout { display: grid; gap: 48px; }
.article-column { min-width: 0; }
.article-heading { margin-bottom: 36px; }
.article-heading h1 { margin-block: 16px 24px; max-width: 24ch; }
.notes-jump { display: inline-flex; align-items: center; min-height: 48px; color: var(--cyan); font-size: 16px; margin-top: 14px; }
.article-section { margin-block: 36px; }
.article-section h2 { margin-bottom: 20px; }
.article-column .reader-callout { margin-block: 36px; }
.article-column .reader-callout h2 { font-size: 1.375rem; }
.article-section ul { padding-left: 20px; }
.article-section li + li { margin-top: 14px; }

.route-sidebar { border-top: 1px solid var(--line); padding-top: 24px; }
.route-sidebar .eyebrow { margin-bottom: 16px; }
.route-sidebar nav { display: grid; }
.route-sidebar nav a { display: flex; justify-content: space-between; align-items: center; gap: 16px; min-height: 52px; padding-block: 14px; border-bottom: 1px solid var(--line); font-size: 16px; text-decoration: none; line-height: 1.5; }
.route-sidebar nav a > span:last-child { color: var(--cyan); flex-shrink: 0; }
.route-sidebar a[aria-current] { color: var(--cyan); }
.sidebar-all { display: flex; align-items: center; min-height: 52px; font-size: 16px; color: var(--muted); padding-block: 14px; margin-top: 12px; }

.next-routes { padding-block: 36px; margin-top: 36px; border-top: 1px solid var(--line); }
.next-routes h2 { margin-bottom: 20px; font-size: 1.25rem; }
.next-grid { display: grid; gap: 12px; }
.next-grid a { display: flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 68px; padding: 16px 20px; border: 1px solid var(--line); text-decoration: none; font-size: 16px; }
.next-grid a:hover { border-color: var(--cyan); }
.route-arrow { color: var(--cyan); font-family: var(--technical); font-size: 1.5rem; }

.page-notes { border-top: 1px solid var(--line); padding-block: 32px 40px; }
.page-notes h2 { margin-bottom: 20px; font-size: 1.25rem; }
.notes-list { padding: 0; margin: 0; list-style: none; display: grid; gap: 6px; }
.notes-list li { display: grid; grid-template-columns: 30px minmax(0, 1fr); column-gap: 12px; align-items: start; max-width: 82ch; font-size: 16px; }
.note-key { padding-top: 10px; font-size: 16px; color: var(--cyan); font-family: var(--technical); }
.source-link { min-height: 44px; display: inline-flex; align-items: center; column-gap: 8px; line-height: 1.5; padding-block: 8px; color: var(--copy); font-size: 16px; }
.source-link span { color: var(--cyan); flex-shrink: 0; }
.notes-list p { color: var(--muted); font-size: 16px; margin: 2px 0 12px; }

.site-footer { border-top: 1px solid var(--line); padding-block: 32px 28px; }
.site-footer p { color: var(--muted); font-size: 16px; max-width: 72ch; }
.site-footer nav { display: grid; grid-template-columns: minmax(0, 1fr); gap: 2px; margin-top: 18px; }
.site-footer nav a, .back-top { display: inline-flex; align-items: center; min-height: 48px; font-size: 16px; line-height: 1.5; }
.site-footer nav a { text-decoration: none; }
.site-footer nav a:hover { color: var(--cyan); text-decoration: underline; }
.back-top { color: var(--muted); margin-top: 12px; }

.checklist { padding-top: 36px; margin-top: 36px; border-top: 1px solid var(--line); }
.checklist h2 { margin-bottom: 16px; }
.no-js-note { color: var(--muted); font-size: 16px; }
.checklist fieldset { border: 1px solid var(--line); padding: 16px; margin: 28px 0 0; min-width: 0; }
.checklist legend { padding-inline: 8px; color: var(--cyan); font-family: var(--technical); font-size: 16px; }
.question-options { display: grid; gap: 8px; }
.question-option { display: flex; align-items: flex-start; gap: 14px; padding: 14px 10px; min-height: 56px; font-size: 16px; line-height: 1.6; cursor: pointer; }
.question-option input { flex-shrink: 0; width: 44px; height: 44px; margin: 1px 0 0; accent-color: var(--cyan); cursor: pointer; }
.question-option:hover, .question-option.is-kept { background: var(--panel); }
.question-option.is-kept { box-shadow: inset 3px 0 var(--cyan); }
.checklist-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
button { display: inline-flex; align-items: center; justify-content: center; gap: 12px; min-height: 48px; padding: 12px 16px; border: 1px solid var(--cyan); background: var(--cyan); color: var(--black); font-size: 16px; font-weight: 700; line-height: 1.5; cursor: pointer; }
button:hover { background: var(--white); border-color: var(--white); }
.button-secondary { border-color: var(--line); background: var(--panel); color: var(--copy); }
.button-secondary:hover { background: var(--line); color: var(--white); }
.checklist-status { margin-top: 20px; min-height: 26px; font-size: 16px; color: var(--cyan); }
.checklist-storage { font-size: 16px; color: var(--muted); }

.skip-link { position: absolute; top: 0; left: 20px; z-index: 10; padding: 14px 20px; min-height: 48px; background: var(--white); color: var(--black); font-size: 16px; transform: translateY(-150%); }
.skip-link:focus { transform: translateY(0); color: var(--black); }

@media (min-width: 620px) {
  .site-shell { width: calc(100% - 64px); }
  .route-gallery { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .gallery-heading, .gallery-tail { grid-column: 1 / -1; }
  .route-project { min-height: 310px; }
  .next-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .site-footer nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
  .site-shell { width: calc(100% - 112px); }
  .site-header { padding-top: 32px; }
  .header-row { padding-bottom: 28px; }
  .header-note { max-width: none; }
  .question-tabs { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .question-tab { min-height: 60px; justify-content: center; text-align: center; }
  .question-tab:nth-child(n) { border-right: 1px solid var(--line); padding-inline: 10px; }
  .question-tab:last-child { border-right: 0; }
  .home-composition { grid-template-columns: minmax(0, 0.9fr) minmax(0, 1fr); column-gap: 72px; padding-top: 64px; }
  .home-intro h1 { font-size: clamp(3.1rem, 4.5vw, 4rem); }
  .home-intro .lead { max-width: 42ch; }
  .home-intro .reader-callout { padding: 24px; }
  .route-gallery { align-content: start; column-gap: 20px; row-gap: 20px; }
  .gallery-heading { padding-bottom: 10px; }
  .route-project { padding: 24px; min-height: 320px; }
  .gallery-tail { padding-block: 20px; }
  .home-bottom { grid-template-columns: minmax(0, 1fr) minmax(0, 0.7fr); gap: 72px; margin-block: 64px 24px; }
  .home-bottom .article-section { margin: 0; }
  .breadcrumb { margin-block: 32px; }
  .article-layout { grid-template-columns: minmax(0, 72ch) minmax(240px, 1fr); gap: 80px; }
  .article-heading { margin-bottom: 44px; }
  .article-section, .article-column .reader-callout { margin-block: 44px; }
  .article-column .reader-callout { padding: 28px 32px; }
  .route-sidebar { align-self: start; margin-top: 10px; padding-top: 24px; }
  .next-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .site-footer nav { display: flex; flex-wrap: wrap; column-gap: 40px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
  html { scroll-behavior: auto; }
}

@media print {
  :root { color-scheme: light; }
  body, html, .site-shell { background: #ffffff; color: #000000; }
  .site-shell { width: 100%; }
  .site-header, .site-footer, .skip-link, .breadcrumb, .route-sidebar, .next-routes, .page-notes, .notes-jump, .checklist-actions, .no-js-note, .checklist-storage, .checklist-status { display: none !important; }
  h1, h2, h3, p, legend, .eyebrow { color: #000000; }
  .article-layout { display: block; }
  .reader-callout { background: #ffffff; border-left-color: #000000; }
  .question-option { background: #ffffff !important; box-shadow: none !important; }
  .print-chosen .question-option:not(.is-kept) { display: none; }
  .checklist fieldset { break-inside: avoid; border-color: #333333; }
  button { display: none; }
}