:root {
    --built-black: #09090b;
    --structure: #15151a;
    --framework: #292931;
    --purple: #7657ff;
    --cyan: #43d9e6;
    --primary-text: #f3f3f5;
    --secondary-text: #a5a5af;
    --muted-text: #71717c;
    --gutter: clamp(1.25rem, 4.5vw, 5rem);
    --rail: clamp(3rem, 7vw, 7rem);
    color-scheme: dark;
}

* { box-sizing: border-box; }
html { min-width: 20rem; scroll-behavior: smooth; scrollbar-color: var(--purple) var(--structure); scrollbar-width: thin; background: var(--built-black); }
html::-webkit-scrollbar { width: .75rem; }
html::-webkit-scrollbar-track { background: var(--structure); }
html::-webkit-scrollbar-thumb { background: var(--purple); border: 2px solid var(--structure); }
html.is-wheel-scrolling { scroll-behavior: auto; }
body { margin: 0; overflow-x: hidden; background: var(--built-black); color: var(--primary-text); font-family: "Microsoft Sans Serif", "Segoe UI", Arial, sans-serif; }
a { color: inherit; }
::selection { background: var(--purple); color: #fff; }

.skip-link { position: fixed; z-index: 100; top: 1rem; left: 1rem; padding: .8rem 1rem; background: var(--primary-text); color: var(--built-black); font-weight: 700; transform: translateY(-180%); }
.skip-link:focus { transform: translateY(0); }

.site-header { position: relative; z-index: 10; display: flex; align-items: center; justify-content: space-between; min-height: 6.25rem; padding: 0 var(--gutter); border-bottom: 1px solid var(--framework); font-family: "Cascadia Mono", Consolas, monospace; font-size: .625rem; letter-spacing: .08em; }
.brand-home { display: block; text-decoration: none; transition: opacity 160ms ease; }
.brand-home:hover, .brand-home:focus-visible { opacity: .72; }
.brand-mark { display: block; width: 7.25rem; aspect-ratio: 1911 / 770; overflow: hidden; }
.brand-mark img { display: block; width: 100%; height: 100%; object-fit: cover; object-position: center; }
.header-about { color: var(--muted-text); text-decoration: none; }
.header-about:hover, .header-about:focus-visible { color: var(--cyan); }
.site-header nav { display: flex; align-items: center; gap: clamp(1.25rem, 3vw, 3rem); }
.nav-link { position: relative; padding: .75rem 0; color: var(--muted-text); text-decoration: none; }
.nav-link:hover, .nav-link:focus-visible, .nav-link[aria-current="page"] { color: var(--primary-text); }
.nav-link[aria-current="page"]::after { position: absolute; right: 0; bottom: .35rem; left: 0; height: 2px; background: var(--purple); content: ""; }
.build-status { justify-self: end; margin: 0; color: var(--muted-text); }
.build-status span { display: inline-block; width: .4rem; height: .4rem; margin-right: .5rem; background: var(--cyan); border-radius: 50%; }
.scroll-meter { position: fixed; z-index: 30; top: 0; right: 0; left: 0; height: 2px; pointer-events: none; }
.scroll-meter span { display: block; width: 100%; height: 100%; background: var(--purple); transform: scaleX(0); transform-origin: left; }

.section-frame { display: grid; grid-template-columns: var(--rail) minmax(0, 1fr); border-bottom: 1px solid var(--framework); }
.section-rail { padding-top: clamp(3rem, 7vw, 7rem); border-right: 1px solid var(--framework); color: var(--muted-text); font-family: "Cascadia Mono", Consolas, monospace; font-size: .625rem; letter-spacing: .1em; text-align: center; }
.eyebrow, .technical-label, .stage-output { font-family: "Cascadia Mono", Consolas, monospace; font-size: .625rem; letter-spacing: .1em; text-transform: uppercase; }
.eyebrow { margin: 0 0 1.5rem; color: var(--cyan); }
.different-accent { color: var(--purple); }
.section-heading { padding: clamp(3rem, 7vw, 7rem) var(--gutter); }
.section-heading h2 { max-width: 13ch; margin: 0; font-size: clamp(3rem, 7vw, 8rem); letter-spacing: normal; line-height: 1.05; }

.hero { position: relative; height: calc(100svh - 6.25rem); min-height: 0; grid-template-rows: minmax(0, 1fr) auto; }
.hero .section-rail { grid-row: 1 / 3; }
.hero-copy { min-height: 0; display: flex; flex-direction: column; justify-content: center; padding: clamp(2.5rem, 6svh, 5rem) var(--gutter) clamp(2rem, 4svh, 3.5rem); }
.hero h1 { max-width: 12ch; margin: 0; font-size: clamp(4rem, min(11.7vw, 18svh), 13rem); letter-spacing: normal; line-height: 1.05; }
.hero h1 > span { display: inline-block; margin-left: clamp(0rem, 8vw, 9rem); color: var(--purple); white-space: nowrap; }
.hero h1 .hero-period { color: var(--primary-text); }
.hero-intro { max-width: 43rem; margin: clamp(2rem, 4svh, 3.5rem) 0 0 max(0rem, 20vw); color: var(--secondary-text); font-size: clamp(1.1rem, 1.7vw, 1.5rem); line-height: 1.55; }
.hero-annotation { position: absolute; top: 50%; right: var(--gutter); display: grid; gap: .6rem; color: var(--muted-text); font-family: "Cascadia Mono", Consolas, monospace; font-size: .55rem; letter-spacing: .1em; text-align: right; transform: rotate(90deg) translateX(50%); transform-origin: right center; }
.hero-annotation span:nth-child(2) { color: var(--cyan); }
.hero-prompt { display: flex; align-items: center; justify-content: space-between; min-height: 5rem; padding: 0 var(--gutter); border-top: 1px solid var(--framework); color: var(--secondary-text); font-family: "Cascadia Mono", Consolas, monospace; font-size: .625rem; letter-spacing: .1em; text-decoration: none; }
.hero-prompt span:last-child { color: var(--purple); font-size: 1rem; }
.hero-prompt:hover, .hero-prompt:focus-visible { background: var(--purple); color: #fff; }
.hero-prompt:hover span:last-child, .hero-prompt:focus-visible span:last-child { color: inherit; }

.section-next { grid-column: 2 / -1; display: flex; align-items: center; justify-content: space-between; min-height: 6.5rem; padding: 1.25rem var(--gutter); border-top: 1px solid var(--framework); background: var(--built-black); color: var(--secondary-text); font-family: "Cascadia Mono", Consolas, monospace; font-size: .7rem; letter-spacing: .1em; text-decoration: none; transition: background-color 180ms ease, color 180ms ease, box-shadow 180ms ease; }
.section-next > span:first-child { display: flex; align-items: baseline; gap: clamp(1rem, 3vw, 3rem); }
.section-next small { color: var(--muted-text); font: inherit; font-size: .6rem; }
.section-next > span:last-child { display: grid; width: 2.75rem; height: 2.75rem; place-items: center; border: 1px solid var(--framework); color: var(--purple); font-size: 1rem; transition: border-color 180ms ease, color 180ms ease, transform 180ms ease; }
.section-next:hover, .section-next:focus-visible { outline: 0; background: var(--purple); box-shadow: inset 3px 0 #fff; color: #fff; }
.section-next:hover small, .section-next:focus-visible small { color: rgba(255,255,255,.7); }
.section-next:hover > span:last-child, .section-next:focus-visible > span:last-child { border-color: rgba(255,255,255,.55); color: #fff; transform: translateY(.2rem); }

.identity { grid-template-columns: var(--rail) minmax(18rem, .7fr) minmax(0, 1.3fr); }
.identity .section-rail { grid-row: 1 / 3; }
.identity .section-heading { border-right: 1px solid var(--framework); }
.identity-panes { display: grid; grid-template-columns: 1fr 1fr; }
.identity-panes article { min-height: 31rem; padding: clamp(3rem, 5vw, 5rem) clamp(1.5rem, 3vw, 3rem); }
.identity-panes article:first-child { border-right: 1px solid var(--framework); }
.technical-label { margin: 0; color: var(--purple); }
.identity-panes article:last-child .technical-label { color: var(--cyan); }
.identity-panes h3 { max-width: 10ch; margin: 6rem 0 1.5rem; font-size: clamp(2rem, 3vw, 3.25rem); letter-spacing: normal; line-height: 1.05; }
.identity-panes article > p:last-child { max-width: 29rem; margin: 0; color: var(--secondary-text); font-size: 1rem; line-height: 1.7; }
.identity blockquote { grid-column: 2 / 4; margin: 0; padding: clamp(3rem, 6vw, 6rem) var(--gutter); border-top: 1px solid var(--framework); }
.identity blockquote p { max-width: 27ch; margin: 0; font-size: clamp(2rem, 4.5vw, 5.25rem); font-weight: 700; letter-spacing: normal; line-height: 1.05; }

.purpose { grid-template-columns: var(--rail) minmax(0, 1.2fr) minmax(20rem, .8fr); }
.purpose .section-rail { grid-row: 1 / 3; }
.purpose-heading { border-right: 1px solid var(--framework); }
.purpose-heading h2 { font-size: clamp(3rem, 6.5vw, 7.5rem); }
.purpose-heading h2 span { color: var(--purple); }
.purpose-copy { display: flex; flex-direction: column; justify-content: center; gap: 1.5rem; padding: clamp(3rem, 7vw, 7rem) var(--gutter); }
.purpose-copy p { max-width: 38rem; margin: 0; color: var(--secondary-text); font-size: clamp(1rem, 1.3vw, 1.15rem); line-height: 1.7; }
.purpose-copy .lead { color: var(--primary-text); font-size: clamp(1.3rem, 2.2vw, 2rem); font-weight: 700; letter-spacing: normal; line-height: 1.35; }
.purpose-outcomes { grid-column: 2 / 4; display: grid; grid-template-columns: repeat(3, 1fr); margin: 0; border-top: 1px solid var(--framework); }
.purpose-outcomes div { min-height: 12rem; padding: 2rem var(--gutter); border-right: 1px solid var(--framework); }
.purpose-outcomes div:last-child { border-right: 0; }
.purpose-outcomes dt { color: var(--cyan); font-family: "Cascadia Mono", Consolas, monospace; font-size: .625rem; letter-spacing: .1em; }
.purpose-outcomes dd { max-width: 22rem; margin: 3rem 0 0; font-size: 1.15rem; font-weight: 700; line-height: 1.4; }

.method { border-bottom: 1px solid var(--framework); }
.method-intro { grid-template-columns: var(--rail) minmax(0, 1fr) minmax(14rem, .32fr); border-bottom: 0; }
.method-intro .section-rail { grid-row: 1; }
.method-intro .section-heading { border-right: 1px solid var(--framework); }
.method-intro .section-heading > p:last-child { max-width: 43rem; margin: 2.5rem 0 0; color: var(--secondary-text); font-size: 1.1rem; line-height: 1.65; }
.method-readout { align-self: end; display: grid; gap: .6rem; margin: 0; padding: 2rem; color: var(--muted-text); font-family: "Cascadia Mono", Consolas, monospace; font-size: .625rem; letter-spacing: .1em; }
.method-readout strong { color: var(--purple); font-size: .75rem; }
.method-stages { margin: 0; padding: 0 0 0 var(--rail); list-style: none; counter-reset: stage; }
.method-stages li { position: relative; display: grid; grid-template-columns: minmax(5rem, .23fr) minmax(20rem, 1fr) minmax(16rem, .55fr); align-items: center; min-height: 12rem; border-top: 1px solid var(--framework); transition: background-color 180ms ease, color 180ms ease; }
.method-stages li::before { position: absolute; top: -1px; bottom: -1px; left: 0; width: 3px; background: var(--purple); content: ""; transform: scaleY(0); transform-origin: top; transition: transform 240ms ease; }
.method-stages li.is-active { background: var(--structure); }
.method-stages li.is-active::before { transform: scaleY(1); }
.stage-number { padding-left: var(--gutter); color: var(--purple); font-family: "Cascadia Mono", Consolas, monospace; font-size: .75rem; }
.stage-copy { align-self: stretch; display: grid; grid-template-columns: minmax(10rem, .7fr) minmax(16rem, 1fr); align-items: center; gap: 2rem; padding: 2rem; border-right: 1px solid var(--framework); border-left: 1px solid var(--framework); }
.stage-copy h3 { margin: 0; font-size: clamp(2rem, 4vw, 4.5rem); letter-spacing: normal; line-height: 1.05; }
.stage-copy p { max-width: 31rem; margin: 0; color: var(--secondary-text); line-height: 1.6; }
.stage-output { padding: 2rem; color: var(--muted-text); }
.method-stages li.is-active .stage-output { color: var(--cyan); }
.method-next { margin-left: var(--rail); }

.proof { grid-template-columns: var(--rail) minmax(18rem, .68fr) minmax(0, 1.32fr); }
.proof .section-rail { grid-row: 1; }
.proof .section-heading { border-right: 1px solid var(--framework); }
.proof-panel { min-width: 0; min-height: 0; height: 100%; max-height: 100%; display: grid; grid-template-rows: auto minmax(0, 1fr); overflow: hidden; }
.proof-copy { display: flex; flex-direction: column; gap: 3rem; padding: clamp(3rem, 7vw, 7rem) var(--gutter) clamp(2rem, 4vw, 4rem); }
.proof-copy p { max-width: 38rem; margin: 0; color: var(--secondary-text); font-size: clamp(1.1rem, 1.7vw, 1.4rem); line-height: 1.65; }
.proof-copy a, .closing-links a { align-self: flex-start; padding-bottom: .4rem; border-bottom: 1px solid var(--purple); font-family: "Cascadia Mono", Consolas, monospace; font-size: .625rem; letter-spacing: .1em; text-decoration: none; }
.proof-copy a span, .closing-links a span { color: var(--cyan); }
.proof-copy a:hover, .proof-copy a:focus-visible, .closing-links a:hover, .closing-links a:focus-visible { color: var(--cyan); }
.project-register { align-self: end; width: 100%; min-height: 0; max-height: clamp(24rem, 30vw, 32rem); overflow-y: auto; overscroll-behavior: contain; border-top: 1px solid var(--framework); scrollbar-color: var(--purple) var(--structure); scrollbar-gutter: stable; scrollbar-width: thin; }
.project-register:focus-visible { outline: 2px solid var(--cyan); outline-offset: -2px; }
.project-register a { display: grid; grid-template-columns: 6rem minmax(12rem, .7fr) minmax(15rem, 1fr) auto; align-items: center; gap: 2rem; min-height: clamp(8rem, 9vw, 10rem); padding: 1rem var(--gutter); border-bottom: 1px solid var(--framework); text-decoration: none; }
.project-register a:last-child { border-bottom: 0; }
.project-register a > span { color: var(--muted-text); font-family: "Cascadia Mono", Consolas, monospace; font-size: .625rem; letter-spacing: .08em; }
.project-register strong { font-size: clamp(1.4rem, 2.5vw, 2.25rem); letter-spacing: normal; }
.project-register a > span:last-child { color: var(--cyan); font-size: 1rem; }
.project-register a:hover, .project-register a:focus-visible { outline: 0; background: var(--purple); color: #fff; }
.project-register a:hover span, .project-register a:focus-visible span { color: inherit; }

.founder { grid-template-columns: var(--rail) minmax(15rem, .45fr) minmax(0, 1.55fr); }
.founder .section-rail { grid-row: 1; }
.founder-signal { display: flex; flex-direction: column; justify-content: space-between; min-height: 49rem; padding: clamp(3rem, 7vw, 7rem) clamp(1.5rem, 3vw, 3rem); border-right: 1px solid var(--framework); background: var(--purple); color: #fff; font-family: "Cascadia Mono", Consolas, monospace; font-size: .625rem; letter-spacing: .1em; }
.signal-line { flex: 1; width: 1px; margin: 2rem 0 2rem .3rem; background: rgba(255,255,255,.6); }
.founder-copy { padding: clamp(3rem, 7vw, 7rem) var(--gutter); }
.founder-copy h2 { max-width: 14ch; margin: 0; font-size: clamp(3rem, 6.5vw, 7.5rem); letter-spacing: normal; line-height: 1.05; }
.founder-body { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(1.5rem, 4vw, 4rem); margin-top: clamp(4rem, 8vw, 8rem); padding-top: 2rem; border-top: 1px solid var(--framework); }
.founder-body p { margin: 0; color: var(--secondary-text); line-height: 1.7; }

.measure { grid-template-columns: var(--rail) minmax(18rem, .65fr) minmax(0, 1.35fr); }
.measure .section-heading { border-right: 1px solid var(--framework); }
.measure .section-heading h2 { font-size: clamp(3rem, 4.1vw, 5.5rem); }
.measure-list { display: grid; grid-template-columns: 1fr 1fr; margin: 0; padding: 0; list-style: none; }
.measure-list li { display: flex; flex-direction: column; justify-content: space-between; min-height: 13rem; padding: 2rem; border-right: 1px solid var(--framework); border-bottom: 1px solid var(--framework); font-size: clamp(1.3rem, 2vw, 2rem); font-weight: 700; letter-spacing: normal; }
.measure-list li:nth-child(even) { border-right: 0; }
.measure-list li:nth-last-child(-n + 2) { border-bottom: 0; }
.measure-list span { color: var(--cyan); font-family: "Cascadia Mono", Consolas, monospace; font-size: .625rem; font-weight: 400; letter-spacing: .1em; }

.closing { display: flex; min-height: 85svh; flex-direction: column; justify-content: center; align-items: center; padding: 7rem var(--gutter); text-align: center; }
.closing h2 { margin: 0; font-size: clamp(3.5rem, 9vw, 10rem); letter-spacing: normal; line-height: 1.05; }
.closing h2 span { color: var(--purple); }
.closing > p:not(.eyebrow) { max-width: 34rem; margin: 3rem 0 0; color: var(--secondary-text); font-size: clamp(1.1rem, 1.7vw, 1.4rem); line-height: 1.6; }
.closing-links { display: flex; gap: 2rem; margin-top: 4rem; }
.site-footer { display: grid; grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr); align-items: center; min-height: 7rem; padding: 0 var(--gutter); border-top: 1px solid var(--framework); color: var(--muted-text); font-family: "Cascadia Mono", Consolas, monospace; font-size: .625rem; letter-spacing: .1em; }
.site-footer p { margin: 0; }
.site-footer > a:nth-child(2) { justify-self: center; text-decoration: none; }
.site-footer > a:nth-child(2):hover, .site-footer > a:nth-child(2):focus-visible { color: var(--cyan); }
.site-footer p { justify-self: end; }
.footer-mark { display: block; width: min(15rem, 42vw); background: var(--purple); -webkit-mask: url("../images/BUILT_DIFFERENT_LINK_STAMP_WHITE_TRANSPARENT.png") center / contain no-repeat; mask: url("../images/BUILT_DIFFERENT_LINK_STAMP_WHITE_TRANSPARENT.png") center / contain no-repeat; transition: opacity 160ms ease; }
.footer-mark:hover, .footer-mark:focus-visible { opacity: .72; }
.footer-mark img { display: block; width: 100%; height: auto; opacity: 0; }

[data-reveal] { opacity: 1; }
.js [data-reveal] { opacity: 0; transform: translateY(2rem); transition: opacity 600ms ease, transform 600ms ease; }
.js [data-reveal].is-visible { opacity: 1; transform: translateY(0); }

@media (max-width: 72rem) {
    .identity, .proof { grid-template-columns: var(--rail) minmax(0, 1fr); }
    .identity .section-rail, .proof .section-rail { grid-row: 1 / 4; }
    .identity .section-heading, .proof .section-heading { border-right: 0; border-bottom: 1px solid var(--framework); }
    .identity-panes, .proof-panel { grid-column: 2; }
    .identity blockquote { grid-column: 2; }
    .proof-panel { height: auto; max-height: none; overflow: visible; }
    .project-register { align-self: stretch; max-height: none; overflow: visible; scrollbar-gutter: auto; }
    .purpose { grid-template-columns: var(--rail) minmax(0, 1fr); }
    .purpose .section-rail { grid-row: 1 / 4; }
    .purpose-heading { border-right: 0; border-bottom: 1px solid var(--framework); }
    .purpose-copy, .purpose-outcomes { grid-column: 2; }
    .founder-body { grid-template-columns: 1fr; }
    .measure { grid-template-columns: var(--rail) minmax(0, 1fr); }
    .measure .section-rail { grid-row: 1 / 3; }
    .measure .section-heading { border-right: 0; border-bottom: 1px solid var(--framework); }
    .measure .section-heading h2 { font-size: clamp(3rem, 7vw, 6.5rem); }
    .measure-list { grid-column: 2; }
}

@media (max-width: 50rem) {
    :root { --rail: 2.75rem; --gutter: 1.25rem; }
    .site-header { grid-template-columns: auto 1fr; min-height: 5rem; }
    .brand-mark { width: 6rem; }
    .site-header nav { justify-self: end; gap: 1.25rem; }
    .build-status { display: none; }
    .hero { height: calc(100svh - 5rem); }
    .hero-copy { padding: clamp(2.25rem, 6svh, 4rem) var(--gutter) clamp(1.75rem, 4svh, 3rem); }
    .hero h1 { font-size: clamp(3.25rem, min(18vw, 9svh), 7rem); }
    .hero h1 > span { margin-left: 0; font-size: min(1em, 15vw); }
    .hero-intro { margin: clamp(1.75rem, 4svh, 3rem) 0 0; }
    .hero-annotation { display: none; }
    .section-next { min-height: 5.5rem; }
    .section-next > span:first-child { align-items: flex-start; flex-direction: column; gap: .5rem; }
    .section-heading h2, .purpose-heading h2, .founder-copy h2, .measure .section-heading h2 { font-size: clamp(3rem, 14vw, 5.5rem); }
    .identity-panes { grid-template-columns: 1fr; }
    .identity-panes article { min-height: 0; padding: 3rem var(--gutter); }
    .identity-panes article:first-child { border-right: 0; border-bottom: 1px solid var(--framework); }
    .identity-panes h3 { margin-top: 4rem; }
    .purpose-outcomes { grid-template-columns: 1fr; }
    .purpose-outcomes div { min-height: 0; border-right: 0; border-bottom: 1px solid var(--framework); }
    .purpose-outcomes div:last-child { border-bottom: 0; }
    .purpose-outcomes dd { margin-top: 2rem; }
    .method-intro { grid-template-columns: var(--rail) minmax(0, 1fr); }
    .method-intro .section-rail { grid-row: 1 / 3; }
    .method-intro .section-heading { border-right: 0; }
    .method-readout { grid-column: 2; border-top: 1px solid var(--framework); }
    .method-stages li { grid-template-columns: 3.5rem minmax(0, 1fr); }
    .stage-number { align-self: stretch; padding: 2rem 0 0; text-align: center; }
    .stage-copy { grid-template-columns: 1fr; gap: 1.5rem; padding: 2rem var(--gutter); border-right: 0; }
    .stage-output { grid-column: 2; padding: 0 var(--gutter) 2rem; }
    .project-register a { grid-template-columns: 4.5rem 1fr auto; gap: 1rem; }
    .project-register a > span:nth-child(3) { grid-column: 2 / 4; }
    .founder { grid-template-columns: var(--rail) minmax(0, 1fr); }
    .founder .section-rail { grid-row: 1 / 3; }
    .founder-signal { grid-column: 2; min-height: 10rem; border-right: 0; }
    .signal-line { width: auto; height: 1px; margin: 1.5rem 0; }
    .founder-copy { grid-column: 2; }
    .measure-list { grid-template-columns: 1fr; }
    .measure-list li, .measure-list li:nth-child(even), .measure-list li:nth-last-child(-n + 2) { min-height: 10rem; border-right: 0; border-bottom: 1px solid var(--framework); }
    .measure-list li:last-child { border-bottom: 0; }
    .closing-links { align-items: center; flex-direction: column; }
    .site-footer { gap: 1rem; min-height: 8rem; }
}

@media (max-width: 29rem) {
    .site-header nav { gap: .8rem; }
    .nav-link:first-child { display: none; }
    .project-register a { grid-template-columns: 3.75rem 1fr auto; padding: 1.25rem; }
    .footer-mark { width: min(6rem, 26vw); }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { transition-duration: .01ms !important; }
    .js [data-reveal] { opacity: 1; transform: none; }
}