:root {
  color-scheme: dark;
  --paper: #101214;
  --ink: #eeeae4;
  --muted: #adb1b5;
  --line: #32363b;
  --wash: #1c2024;
  --accent: #dfac7b;
  --serif: 'Newsreader', Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --ease-icon: cubic-bezier(0.2, 0, 0, 1);
  --rail: 240px;
  scroll-padding-top: 32px;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 1rem/1.6 var(--sans); -webkit-font-smoothing: antialiased; }
p, h1, h2, h3, figure { margin: 0; }
p, h1, h2, h3 { overflow-wrap: break-word; }
a { color: inherit; text-decoration: none; }
a, summary { -webkit-tap-highlight-color: transparent; }
a:focus-visible, summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 5px; }
.brand, .index-bottom a, .career-map a, .project-list a, .footer-links a { border-radius: 3px; }
::selection { background: #dfac7b; color: #101214; }
.icon-library { position: absolute; width: 0; height: 0; overflow: hidden; }
.icon { width: 24px; height: 24px; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; flex-shrink: 0; }
.skip { position: fixed; z-index: 10; left: 16px; top: -100px; padding: 12px 16px; background: var(--ink); color: var(--paper); }
.skip:focus { top: 16px; }
main { margin-left: var(--rail); padding: 0 clamp(32px, 5.5vw, 100px); max-width: 1550px; }
main:focus { outline: none; }
.index { width: var(--rail); padding: 42px 30px 30px; position: fixed; inset: 0 auto 0 0; border-right: 1px solid var(--line); display: flex; flex-direction: column; background: var(--paper); z-index: 3; overflow-y: auto; }
.brand { font-size: 1.3rem; font-weight: 600; letter-spacing: -.05em; width: fit-content; min-height: 44px; display: flex; align-items: center; }
.brand-period { color: var(--accent); }
.index-caption { margin-top: 17px; font-size: .875rem; line-height: 1.5; color: var(--muted); }
.index-nav { margin-top: 66px; display: grid; gap: 4px; }
.index-nav a { display: flex; align-items: center; gap: 12px; min-height: 44px; margin-inline: -10px; padding: 10px; border-radius: 5px; color: var(--muted); font-size: .875rem; transition: color 120ms ease, background-color 120ms ease; }
.index-nav a span { width: 20px; flex-shrink: 0; font-size: .75rem; font-variant-numeric: tabular-nums; }
.index-nav a[aria-current="location"] { color: var(--ink); background: var(--wash); font-weight: 600; }
.index-nav a[aria-current="location"] span { color: var(--accent); }
.index-bottom { margin-top: auto; display: grid; align-items: start; font-size: .875rem; }
.index-bottom>a { display: flex; justify-content: space-between; align-items: center; min-height: 44px; }
.index-bottom .icon { width: 16px; height: 16px; }
.index-bottom p { margin-top: 24px; color: var(--muted); }
.index-bottom p a { text-decoration: underline; text-underline-offset: 4px; }
.eyebrow, .edition { font-size: .75rem; letter-spacing: .04em; }
.eyebrow { font-weight: 600; text-transform: uppercase; }
.edition { color: var(--muted); }
.intro { padding-top: 40px; padding-bottom: 32px; }
.intro-top, .section-top { display: flex; justify-content: space-between; gap: 24px; align-items: baseline; }
h1 { font: 400 clamp(5.5rem, 8vw, 7rem)/.92 var(--serif); letter-spacing: -.045em; padding-top: 32px; padding-bottom: 24px; }
h1 em { font-weight: 400; }
.name-period { color: var(--accent); }
.intro-bottom { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.intro-bottom>*, .section-intro>*, .adoption-body>* { min-width: 0; }
.opening { font: 400 clamp(1.65rem, 2.2vw, 2.25rem)/1.17 var(--serif); max-width: 370px; }
.intro-copy { color: var(--muted); max-width: 430px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 24px; min-height: 48px; padding: 12px 16px 12px 18px; border-radius: 6px; background: var(--ink); color: var(--paper); font-size: .875rem; margin-top: 24px; transition: transform 150ms var(--ease-out), background-color 120ms ease; }
.button .icon { width: 20px; height: 20px; }
.button:active:not(:focus-visible) { transform: scale(.96); }
.button[data-static]:active { transform: none; }
.career-map { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); margin-top: 28px; border-top: 1px solid var(--line); }
.career-map a { min-height: 100px; padding: 20px 16px 4px 0; position: relative; }
.career-map a::before { content: ''; position: absolute; top: -4px; left: 0; width: 7px; height: 7px; border: 1px solid var(--muted); border-radius: 50%; background: var(--paper); }
.career-map a:last-child::before { border-color: var(--accent); background: var(--accent); }
.career-map span { font-size: .75rem; font-variant-numeric: tabular-nums; color: var(--muted); }
.career-map strong { display: block; font-size: .875rem; font-weight: 400; line-height: 1.4; margin-top: 10px; }
.page-section { scroll-margin-top: 32px; }
.work-section, .approach-section { border-top: 1px solid var(--line); padding-block: 54px 70px; }
.section-top { margin-bottom: 38px; }
.section-intro { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; margin-bottom: 40px; }
h2 { font: 400 clamp(2.7rem, 4.2vw, 4.2rem)/1.08 var(--serif); letter-spacing: -.035em; text-wrap: balance; }
h2 em { font-weight: 400; color: var(--muted); }
.section-intro>p { color: var(--muted); max-width: 430px; }
.practice { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 32px; border-top: 1px solid var(--line); padding: 28px 0 38px; }
.practice h3 { font: 400 1.5rem/1.2 var(--serif); margin-bottom: 12px; }
.practice p { color: var(--muted); font-size: 1rem; }
.practice p+p { margin-top: 16px; }
.technical-range { display: grid; grid-template-columns: 1fr 2fr; gap: 32px; padding-top: 28px; border-top: 1px solid var(--line); }
.technical-range h3 { font: 400 1.65rem/1.2 var(--serif); }
.technical-range p { color: var(--muted); }
.technical-range p+p { margin-top: 16px; }
.timeline-guide { color: var(--muted); font-size: .875rem; margin: 0 0 24px; max-width: 660px; }
.chapter-preview { color: var(--muted); font-size: .875rem; line-height: 1.5; max-width: 560px; }
.detail-heading { color: var(--ink); font: 400 1.4rem/1.2 var(--serif); margin-top: 28px; }
.internal-projects { margin: 18px 0; }
.internal-projects>div { border-top: 1px solid var(--line); padding-block: 18px; }
.internal-projects dt { color: var(--ink); font-weight: 500; }
.internal-projects dt span { display: block; color: var(--accent); font-size: .75rem; font-weight: 400; margin-top: 3px; }
.internal-projects dd { margin: 10px 0 0; font-size: .875rem; }
.lineage { padding-left: 18px; border-left: 2px solid var(--accent); margin-block: 22px; }
.work-list { border-bottom: 1px solid var(--line); }
.chapter { border-top: 1px solid var(--line); scroll-margin-top: 28px; }
.chapter summary { display: grid; grid-template-columns: 100px minmax(0, 1fr) 36px; gap: 24px; padding: 28px 0; cursor: pointer; list-style: none; align-items: start; }
.chapter summary::-webkit-details-marker { display: none; }
.year { padding-top: 3px; font-size: .875rem; color: var(--muted); font-variant-numeric: tabular-nums; }
.chapter-heading { display: grid; gap: 8px; }
.discipline { color: var(--muted); font-size: .75rem; }
.chapter-heading strong { font: 400 clamp(1.8rem, 2.5vw, 2.6rem)/1.16 var(--serif); letter-spacing: -.02em; }
.toggle { width: 36px; height: 36px; border-radius: 50%; background: var(--wash); position: relative; margin-top: 1px; color: var(--muted); transition: background-color 150ms ease, color 150ms ease, scale 150ms var(--ease-out); }
.chapter summary:active .toggle { scale: .96; }
.toggle .icon { position: absolute; inset: 6px; transition: opacity 300ms var(--ease-icon), scale 300ms var(--ease-icon), filter 300ms var(--ease-icon); }
.icon-minus { opacity: 0; scale: .25; filter: blur(4px); }
.chapter[open] .icon-minus { opacity: 1; scale: 1; filter: blur(0px); }
.chapter[open] .icon-plus { opacity: 0; scale: .25; filter: blur(4px); }
.chapter[open] .toggle { background: var(--ink); color: var(--paper); }
.chapter[open] .year { color: var(--accent); }
.chapter-body { margin-left: 124px; padding: 0 0 34px; max-width: 770px; color: var(--muted); }
.chapter-body>p+p { margin-top: 16px; }
.chapter-note { font-size: .8125rem; line-height: 1.6; }
.project-list { margin: 26px 0 18px; }
.project-list a { display: grid; grid-template-columns: 120px minmax(0,1fr) 20px; gap: 18px; align-items: baseline; min-height: 64px; padding: 15px 0; border-top: 1px solid var(--line); font-size: .875rem; }
.project-name { color: var(--ink); font-weight: 500; }
.project-list .icon { width: 20px; height: 20px; align-self: start; }
.footnote { margin-top: 24px; color: var(--muted); font-size: .8125rem; }
.section-lead { max-width: 610px; color: var(--muted); margin-top: 24px; font-size: 1.125rem; }
.workflow { margin: 42px 0 40px; background: var(--wash); color: var(--ink); padding: 28px; border-radius: 3px; }
.workflow figcaption { display: flex; justify-content: space-between; gap: 24px; font-size: .8125rem; }
.workflow figcaption span:last-child { color: #bfc4ba; font-size: .75rem; }
.workflow-steps { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 18px; list-style: none; padding: 0; margin: 34px 0; }
.workflow-steps li { position: relative; display: flex; flex-direction: column; gap: 4px; }
.workflow-steps li:not(:last-child)::after { content: ''; position: absolute; right: 0; top: 32px; width: 16px; height: 16px; background: #bfc4ba; -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12h14m-6-6 6 6-6 6'/%3E%3C/svg%3E") center / contain no-repeat; mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12h14m-6-6 6 6-6 6'/%3E%3C/svg%3E") center / contain no-repeat; }
.workflow-steps li>span { color: #bfc4ba; font-size: .75rem; margin-bottom: 6px; }
.workflow-steps strong { font: 400 1.65rem/1.2 var(--serif); }
.workflow-steps small { color: #bfc4ba; font-size: .75rem; }
.workflow-foundation { border-top: 1px solid #5b6159; padding-top: 16px; display: flex; justify-content: space-between; gap: 20px; font-size: .8125rem; }
.workflow-foundation span:last-child { color: #bfc4ba; }
.principles article { display: grid; grid-template-columns: 100px minmax(0,1fr); gap: 24px; border-top: 1px solid var(--line); padding-block: 26px; }
.principle-number { color: var(--accent); font-size: .8125rem; padding-top: 4px; }
.principles h3 { font: 400 1.65rem/1.2 var(--serif); margin-bottom: 10px; }
.principles p { color: var(--muted); max-width: 660px; }
.adoption-section { border-top: 1px solid var(--line); padding-block: 54px 64px; }
.adoption-body { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; margin-top: 38px; }
.adoption-statement { font: 400 1.85rem/1.25 var(--serif); max-width: 350px; }
.adoption-body>div { color: var(--muted); }
.adoption-body p+p { margin-top: 20px; }
.adoption-section .practice { margin-top: 32px; }
.adoption-signoff { border-top: 1px solid var(--line); margin-top: 36px; padding-top: 24px; display: flex; align-items: center; justify-content: space-between; gap: 20px; font-size: .875rem; }
.button-light { margin: 0; background: var(--wash); color: var(--ink); box-shadow: 0 0 0 1px oklch(1 0 0 / .08); }
.footer { border-top: 1px solid var(--line); padding-block: 28px 36px; display: flex; align-items: center; justify-content: space-between; gap: 24px; font-size: .8125rem; }
.footer strong { font-weight: 500; }
.footer p { color: var(--muted); margin-top: 4px; }
.footer-link { min-height: 44px; display: inline-flex; gap: 12px; align-items: center; }
.footer-links { display: flex; flex-wrap: wrap; gap: 8px 24px; }
.footer-links>a { display: inline-flex; align-items: center; min-height: 44px; }
.footer-link .icon { width: 16px; height: 16px; transform: rotate(-90deg); }
.enter { animation: appear 260ms var(--ease-out) both; }
h1.enter { animation-delay: 100ms; }
.intro-bottom.enter { animation-delay: 200ms; }
.career-map.enter { animation-delay: 300ms; }
@keyframes appear { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
/* Press feedback for every pressable, including coarse pointers that never hover. */
.index-nav a:active, .index-bottom a:active, .career-map a:active, .footer-links a:active, .project-list a:active .project-name, .project-list a:active .icon { color: var(--accent); }
/* Pointer feedback never delays keyboard actions. */
html[data-input="pointer"] { scroll-behavior: smooth; }
html[data-input="keyboard"] *, html[data-input="keyboard"] *::before, html[data-input="keyboard"] *::after { animation: none !important; transition: none !important; }
summary:focus-visible .icon { transition: none; }
html[data-input="keyboard"] .button:active { transform: none; }
html[data-input="keyboard"] .chapter summary:active .toggle { scale: 1; }
@media (hover: hover) and (pointer: fine) {
  .index-nav a:hover { color: var(--ink); background: var(--wash); }
  .index-bottom a:hover, .career-map a:hover, .footer-links a:hover { color: var(--accent); }
  .button:hover { background: #dfac7b; }
  .button-light:hover { background: #292e33; }
  .chapter summary:hover .chapter-heading strong { color: var(--accent); }
  .chapter:not([open]) summary:hover .toggle { color: var(--ink); }
  .project-list a:hover .project-name { color: var(--accent); text-decoration: underline; text-underline-offset: 4px; }
  .project-list a:hover .icon { color: var(--accent); }
}
@media (min-width: 1700px) { main { margin-inline: auto; padding-left: calc(var(--rail) + 30px); } }
@media (max-width: 1180px) {
  :root { --rail: 200px; }
  .index { padding-inline: 24px; }
  main { padding-inline: 38px; }
  .index-nav a { gap: 8px; font-size: .8125rem; }
  .intro-bottom, .section-intro { gap: 28px; }
  .intro-top .edition { display: none; }
  .chapter summary { grid-template-columns: 80px minmax(0,1fr) 36px; gap: 20px; }
  .chapter-body { margin-left: 100px; }
  .project-list a { grid-template-columns: 105px minmax(0,1fr) 20px; gap: 12px; }
  .principles article { grid-template-columns: 80px minmax(0,1fr); gap: 20px; }
}
@media (max-width: 900px) {
  .practice { grid-template-columns: 1fr; gap: 24px; }
  .technical-range { grid-template-columns: 1fr; gap: 18px; }
  .index { position: relative; width: 100%; height: auto; padding: 18px 28px 0; border-right: 0; border-bottom: 1px solid var(--line); flex-direction: row; align-items: center; flex-wrap: wrap; gap: 8px 28px; }
  .brand { font-size: 1.15rem; }
  .index-caption { margin: 0 0 0 auto; font-size: .75rem; text-align: right; }
  .index-caption br { display: none; }
  .index-nav { display: flex; flex-wrap: wrap; gap: 0 20px; width: 100%; margin-top: 4px; }
  .index-nav a { margin: 0; padding: 12px 0; border-radius: 0; min-height: 46px; font-size: .875rem; }
  .index-nav a span { display: none; }
  .index-nav a[aria-current="location"] { background: transparent; box-shadow: inset 0 -2px var(--accent); }
  .index-bottom { display: none; }
  main { margin: 0; padding-inline: 28px; }
  .intro { padding-top: 32px; }
  h1 { padding-top: 38px; font-size: clamp(6rem, 14vw, 8.5rem); }
  .intro-top .edition { display: block; }
  .career-map { margin-top: 40px; }
  .work-section, .approach-section, .adoption-section { padding-block: 44px 54px; }
}
@media (max-width: 580px) {
  main { padding-inline: 20px; }
  .index { padding-inline: 20px; }
  .index-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 0 18px; }
  .index-nav a { font-size: .8125rem; }
  .index-caption { display: none; }
  .intro { padding-bottom: 36px; }
  .intro-top .edition { display: none; }
  h1 { font-size: clamp(3rem, 18vw, 7rem); padding-block: 34px 30px; }
  .intro-bottom, .section-intro, .adoption-body { grid-template-columns: 1fr; gap: 20px; }
  .opening { font-size: 1.9rem; }
  .desktop-break { display: none; }
  .intro-copy { max-width: none; }
  .button { margin-top: 20px; }
  .career-map a { padding-right: 8px; }
  .career-map strong { font-size: .75rem; }
  .section-top { margin-bottom: 26px; }
  .section-top .edition { font-size: .75rem; }
  .section-intro { margin-bottom: 28px; }
  h2 { font-size: 2.7rem; }
  .chapter summary { grid-template-columns: minmax(0,1fr) 36px; gap: 10px 16px; padding-block: 22px; }
  .year { grid-column: 1; padding: 0; font-size: .8125rem; }
  .chapter-heading { grid-column: 1; gap: 8px; }
  .chapter-heading strong { font-size: 1.85rem; }
  .toggle { grid-column: 2; grid-row: 1 / 3; align-self: center; }
  .chapter-body { margin: 0; padding-bottom: 28px; }
  .project-list a { grid-template-columns: minmax(0,1fr) 20px; gap: 5px 16px; }
  .project-list a>span:nth-child(2) { grid-column: 1; }
  .project-list .icon { grid-row: 1 / 3; grid-column: 2; }
  .milestones li { grid-template-columns: 80px 1fr; gap: 16px; }
  .workflow { padding: 22px 18px; margin-block: 30px; }
  .workflow figcaption span:last-child { display: none; }
  .workflow-steps { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 28px 20px; }
  .workflow-steps li:nth-child(2)::after { display: none; }
  .workflow-steps small br { display: none; }
  .workflow-foundation { flex-direction: column; gap: 4px; }
  .principles article { grid-template-columns: 24px minmax(0,1fr); gap: 14px; }
  .principles h3 { font-size: 1.6rem; }
  .adoption-body { margin-top: 28px; gap: 26px; }
  .adoption-statement { font-size: 1.65rem; max-width: none; }
  .adoption-signoff { align-items: flex-start; flex-direction: column; gap: 16px; }
  .adoption-signoff .button { margin: 0; }
  .footer { align-items: flex-start; flex-direction: column; gap: 12px; }
}
@media (prefers-reduced-motion: reduce) {
  html[data-input="pointer"] { scroll-behavior: auto; }
  .enter { animation: none; }
  .button { transition: background-color 120ms ease; }
  .button:active:not(:focus-visible) { transform: none; }
  .toggle { transition: background-color 150ms ease, color 150ms ease; }
  .chapter summary:active .toggle { scale: 1; }
  .toggle .icon { transition: opacity 120ms ease; scale: 1 !important; filter: none !important; }
}
@media print {
  :root { color-scheme: light; --paper: white; --ink: black; --muted: #444; --wash: #f5f5f5; --line: #ccc; --accent: #754000; }
  .index, .skip, .button, .toggle, .career-map, .footer-link { display: none; }
  main { margin: 0; padding: 0; max-width: none; }
  .intro { padding: 0; }
  h1 { font-size: 52pt; padding-block: 20px; }
  h1 br { display: none; }
  h1 em::before { content: ' '; }
  .enter { animation: none; }
  .work-section, .approach-section, .adoption-section { padding-block: 24px; }
  .chapter { break-inside: avoid; }
  .chapter summary { grid-template-columns: 90px 1fr; padding-block: 18px; }
  .chapter-body { margin-left: 114px; }
  details::details-content { content-visibility: visible; }
  h2 { font-size: 28pt; }
  .chapter-heading strong { font-size: 21pt; }
  .workflow { color: black; background: white; border: 1px solid #aaa; }
  .workflow span, .workflow small { color: #444 !important; }
  .footer { padding-bottom: 0; }
}