.site-header {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 50;
    display: flex;
    width: 100%;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.15rem var(--gutter);
    border-bottom: 1px solid transparent;
    color: var(--text-soft);
    font-family: var(--mono);
    font-size: 0.68rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.site-header.is-defined {
    border-color: var(--line);
    background: color-mix(in srgb, var(--bg) 90%, transparent);
    backdrop-filter: blur(16px);
}

.wordmark { color: var(--text); font-weight: 700; text-decoration: none; text-transform: none; }
.wordmark span { margin-left: 0.3rem; color: var(--accent); }
.site-nav { display: flex; align-items: center; gap: clamp(0.8rem, 2vw, 2rem); }
.site-nav a { position: relative; text-decoration: none; }
.site-nav a::after {
    position: absolute;
    right: 0;
    bottom: -0.55rem;
    left: 0;
    height: 1px;
    background: var(--accent);
    content: "";
    opacity: 0;
    transform: scaleX(0.2);
}
.site-nav a.is-active::after { opacity: 1; transform: scaleX(1); }

.hero {
    position: relative;
    display: grid;
    min-height: 100svh;
    place-items: center;
    overflow: clip;
    padding: 6rem var(--gutter) 3rem;
    isolation: isolate;
}

.hero::before {
    position: absolute;
    inset: 0;
    z-index: -3;
    background:
        linear-gradient(90deg, transparent 49.94%, rgba(255,255,255,0.035) 50%, transparent 50.06%),
        linear-gradient(rgba(255,255,255,0.022) 1px, transparent 1px);
    background-size: 100% 5rem;
    content: "";
    mask-image: linear-gradient(to bottom, transparent 0, black 20%, black 75%, transparent 100%);
}

.hero-frame {
    position: relative;
    width: min(48rem, 80vw);
    min-height: min(68vh, 40rem);
    padding: clamp(1.2rem, 3vw, 2.25rem);
    border: 1px solid var(--line-strong);
    background: color-mix(in srgb, var(--surface) 88%, transparent);
    box-shadow: 0 2rem 8rem rgba(0,0,0,0.45);
}

.hero-frame::before,
.hero-frame::after {
    position: absolute;
    width: 0.75rem;
    height: 0.75rem;
    content: "";
}
.hero-frame::before { top: -1px; left: -1px; border-top: 1px solid var(--accent); border-left: 1px solid var(--accent); }
.hero-frame::after { right: -1px; bottom: -1px; border-right: 1px solid var(--accent); border-bottom: 1px solid var(--accent); }

.hero-frame__registration,
.hero-frame__meta {
    display: flex;
    justify-content: space-between;
    color: var(--text-faint);
    font-family: var(--mono);
    font-size: 0.62rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.hero-frame__content {
    display: flex;
    min-height: 28rem;
    flex-direction: column;
    justify-content: center;
    padding: clamp(2.5rem, 8vh, 6rem) clamp(0rem, 4vw, 3.5rem);
}

.hero-frame h1 {
    margin-bottom: 1.5rem;
    font-size: clamp(4rem, 10vw, 8rem);
}
.hero-frame h1 span { display: block; }
.hero-frame h1 span:last-child { color: var(--accent); }
.hero-frame__summary { max-width: 25rem; color: var(--text-soft); font-size: clamp(1.05rem, 1.7vw, 1.4rem); }
.hero-frame__actions { display: flex; gap: 2rem; margin-top: 2rem; }
.text-action { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.12em; text-decoration: none; text-transform: uppercase; }
.text-action--primary { color: var(--accent); }
.hero-frame__meta { margin: 0; padding: 0; list-style: none; }
.hero-index { position: absolute; right: var(--gutter); bottom: 1.5rem; color: var(--text-faint); font-family: var(--mono); font-size: 0.58rem; letter-spacing: 0.12em; }

.site-interior { border-top: 1px solid var(--line); background: var(--bg); }
.section { max-width: var(--content); margin: 0 auto; padding: var(--space-8) var(--gutter); }
.section-heading--split { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(16rem, 0.6fr); gap: var(--space-5); align-items: end; margin-bottom: var(--space-7); }
.section-heading h2 { margin-bottom: 0; font-size: clamp(3.3rem, 7.2vw, 7.5rem); }
.section-intro { max-width: 34rem; margin-bottom: 0.5rem; color: var(--text-soft); }

.project-sequence { display: grid; min-width: 0; grid-template-columns: minmax(0, 1fr); gap: clamp(11rem, 16vw, 17rem); }
.project { position: relative; min-width: 0; padding-top: var(--space-4); border-top: 1px solid var(--line-strong); scroll-margin-top: 5rem; }
.project__heading { display: grid; min-width: 0; grid-template-columns: 5rem minmax(0, 1fr) minmax(15rem, 0.7fr); gap: var(--space-4); align-items: start; }
.project__number { color: var(--accent); font-family: var(--mono); font-size: 0.75rem; }
.project__heading h3 { margin-bottom: 1rem; font-size: clamp(3.2rem, 6.5vw, 7rem); }
.project__heading h3,
.project__meta dd,
.project__meta a { min-width: 0; overflow-wrap: anywhere; }
.project__headline { max-width: 46rem; color: var(--text-soft); font-size: clamp(1.1rem, 1.7vw, 1.4rem); }
.project__underhood { max-width: 48rem; margin: 1.2rem 0 0; color: var(--text-faint); font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.04em; line-height: 1.7; text-transform: uppercase; }
.project__underhood span { display: block; margin-bottom: 0.35rem; color: var(--accent); font-size: 0.62rem; letter-spacing: 0.1em; }
.project__meta { display: grid; grid-template-columns: auto 1fr; gap: 0.65rem 1.2rem; margin: 0; font-family: var(--mono); font-size: 0.74rem; line-height: 1.55; text-transform: uppercase; }
.project__meta dt { color: var(--text-faint); }
.project__meta dd { margin: 0; }
.project__body { display: grid; min-width: 0; grid-template-columns: minmax(18rem, 0.7fr) minmax(0, 1.3fr); gap: clamp(3rem, 8vw, 8rem); margin-top: var(--space-5); }
.project__copy { max-width: 42rem; font-size: clamp(1.17rem, 1.35vw, 1.28rem); line-height: 1.72; }
.project__copy p { color: var(--text-soft); }
.project__question { margin-top: 2.25rem; color: var(--text); font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.08em; text-transform: uppercase; }
.project__concepts { display: flex; flex-wrap: wrap; gap: 0.45rem 1.1rem; padding: 1.5rem 0 0; border-top: 1px solid var(--line); list-style: none; }
.project__concepts li { color: var(--text-faint); font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.08em; text-transform: uppercase; }
.project__concepts li::before { margin-right: 0.5rem; color: var(--accent); content: "+"; }
.project__preview { min-width: 0; min-height: 28rem; border-left: 1px solid var(--line); padding-left: clamp(1.5rem, 4vw, 4rem); }
.project__placeholder { display: grid; min-height: inherit; place-items: center; border: 1px dashed var(--line); color: var(--text-faint); font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; }

.statement { position: relative; display: grid; min-height: 92svh; place-content: center; overflow: hidden; margin-block: clamp(4rem, 8vw, 8rem); padding: var(--space-7) var(--gutter); background: var(--text); color: var(--bg-deep); }
.statement::after { position: absolute; right: -4vw; bottom: -0.18em; color: rgba(0,0,0,0.06); content: "//"; font-family: var(--mono); font-size: 30vw; line-height: 1; }
.statement h2 { margin-bottom: 1.5rem; font-size: clamp(4.5rem, 11vw, 11rem); }
.statement > p:last-child { color: #5b594f; font-family: var(--mono); letter-spacing: 0.14em; text-transform: uppercase; }
.statement--engine { background: var(--accent); }
.engine-section { max-width: none; padding-right: 0; padding-left: 0; background: #070707; }
.project-sequence--engine .project { padding: var(--space-7) var(--gutter); border-top: 0; }

.organization-map { position: relative; display: grid; gap: 0; max-width: 70rem; margin: 0 auto; padding: 7rem 0 2rem; }
.organization-map::before { position: absolute; top: 0; bottom: 0; left: 50%; width: 1px; background: var(--line-strong); content: ""; }
.organization-map::after { position: absolute; top: 0; bottom: 0; left: 0; width: 1px; background: var(--line); content: ""; }
.organization-map__axis { position: absolute; top: 0; font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase; }
.organization-map__axis--engineering { left: 0; color: var(--accent); }
.organization-map__axis--leadership { right: 0; }
.organization-map__legend { position: absolute; top: 2.2rem; right: 0; left: 0; display: flex; justify-content: center; gap: clamp(1rem, 3vw, 2.5rem); color: var(--text-faint); font-family: var(--mono); font-size: 0.6rem; letter-spacing: 0.06em; text-transform: uppercase; }
.organization-map__legend span { display: inline-flex; align-items: center; gap: 0.55rem; }
.role-key { display: inline-block; width: 1.5rem; height: 1px; background: var(--line-strong); }
.role-key--engineering { background: var(--accent); }
.role-key--cross { position: relative; background: linear-gradient(90deg, var(--accent) 0 50%, var(--text) 50%); }
.role-key--cross::after { position: absolute; top: -3px; left: calc(50% - 3px); width: 7px; height: 7px; background: var(--accent); content: ""; transform: rotate(45deg); }
.role-key--leadership { background: var(--text); }
.organization { position: relative; display: grid; grid-template-columns: 1fr 1fr; min-height: 9rem; align-items: center; border-top: 1px solid var(--line); }
.organization::before { position: absolute; top: 50%; left: calc(50% - 4px); z-index: 1; width: 9px; height: 9px; border: 2px solid var(--bg); background: var(--accent); content: ""; transform: rotate(45deg); }
.organization__summary { grid-column: 1 / -1; display: grid; grid-template-columns: 1fr 1fr; align-items: center; width: 100%; padding: 1.4rem 0; border: 0; background: transparent; text-align: left; cursor: pointer; }
.organization__name { padding-right: 2.5rem; font-family: var(--display); font-size: clamp(1.5rem, 3vw, 2.5rem); font-weight: 800; letter-spacing: -0.035em; line-height: 1; text-transform: uppercase; }
.organization__roles { padding-left: 2.5rem; color: var(--text-soft); font-family: var(--mono); font-size: 0.68rem; line-height: 1.8; letter-spacing: 0.08em; text-transform: uppercase; }
.organization__scope { display: block; margin-bottom: 0.6rem; color: var(--accent); letter-spacing: 0.12em; }
.organization__role { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 1rem; padding: 0.35rem 0; border-bottom: 1px solid var(--line); }
.organization__role b { color: var(--text-soft); font-weight: 400; }
.organization__role em { color: var(--text-faint); font-size: 0.58rem; font-style: normal; text-align: right; }
.organization--engineering { width: 50%; }
.organization--engineering::before { left: -4px; }
.organization--engineering .organization__summary { grid-template-columns: 1fr; }
.organization--engineering .organization__name { padding-right: 1rem; }
.organization--engineering .organization__roles { padding: 0.75rem 1rem 0 0; }
.organization--leadership { width: 50%; margin-left: 50%; }
.organization--leadership .organization__summary { grid-template-columns: 1fr; }
.historical-note { display: grid; grid-template-columns: minmax(10rem, 0.5fr) 1fr; gap: var(--space-5); max-width: 70rem; margin: var(--space-6) auto 0; padding-top: var(--space-4); border-top: 1px solid var(--line); color: var(--text-soft); }

.principle-list { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--line-strong); }
.principle { min-height: 24rem; padding: var(--space-4); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.principle:nth-child(2n) { border-right: 0; }
.principle__number { color: var(--accent); font-family: var(--mono); font-size: 0.7rem; }
.principle h3 { max-width: 33rem; margin: 4rem 0 2rem; font-size: clamp(2rem, 4vw, 4rem); }
.principle p { max-width: 33rem; color: var(--text-soft); }
.principle__evidence { display: block; margin-top: 2rem; color: var(--text-faint); font-family: var(--mono); font-size: 0.65rem; letter-spacing: 0.08em; line-height: 1.7; text-transform: uppercase; }

.contact-section { min-height: 92svh; padding: var(--space-8) var(--gutter); border-top: 1px solid var(--line); background: var(--surface); }
.contact-section h2 { max-width: 78rem; margin: clamp(4rem, 12vh, 8rem) 0 2rem; font-size: clamp(4.5rem, 10vw, 10rem); }
.contact-section h2 span { display: block; }
.contact-close { display: grid; max-width: 78rem; grid-template-columns: minmax(18rem, 1fr) minmax(18rem, 0.8fr); gap: 1.5rem clamp(3rem, 10vw, 10rem); align-items: start; margin-top: clamp(3rem, 7vw, 6rem); padding-top: 2rem; border-top: 1px solid var(--line-strong); }
.contact-close p { margin: 0; color: var(--text-soft); }
.contact-close__summary { max-width: 43rem; font-size: clamp(1.2rem, 2vw, 1.65rem); line-height: 1.5; }
.contact-close__positioning { max-width: 31rem; font-size: 0.95rem; }
.contact-actions { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 1rem 2.5rem; margin-top: 1.5rem; }

.site-footer { display: flex; justify-content: space-between; gap: 2rem; padding: 1.5rem var(--gutter); border-top: 1px solid var(--line); color: var(--text-faint); font-family: var(--mono); font-size: 0.62rem; letter-spacing: 0.08em; text-transform: uppercase; }
.noscript-message { position: fixed; right: 1rem; bottom: 1rem; left: 1rem; z-index: 100; padding: 1rem; border: 1px solid var(--accent); background: var(--surface); }

@media (max-width: 800px) {
    :root { --space-8: 7rem; }
    .site-header { align-items: flex-start; }
    .site-nav { gap: 0.9rem; }
    .site-nav a:nth-child(2) { display: none; }
    .hero-frame { width: 100%; min-height: 72svh; }
    .hero-frame__registration span:nth-child(2), .hero-frame__meta li:nth-child(2) { display: none; }
    .section-heading--split,
    .project__heading,
    .project__body { grid-template-columns: 1fr; }
    .project-sequence { gap: 9rem; }
    .section-heading--split { gap: 1.5rem; margin-bottom: 5rem; }
    .project__heading { gap: 1rem; }
    .project__meta { margin-top: 1rem; }
    .project__preview { min-height: 22rem; padding-top: 2rem; padding-left: 0; border-top: 1px solid var(--line); border-left: 0; }
    .organization-map { padding-top: 4rem; }
    .organization__name { padding-right: 1.25rem; font-size: 1.3rem; }
    .organization__roles { padding-left: 1.25rem; }
    .historical-note { grid-template-columns: 1fr; gap: 1rem; }
    .contact-close { grid-template-columns: 1fr; gap: 1.25rem; }
    .contact-actions { grid-column: 1; }
    .principle-list { grid-template-columns: 1fr; }
    .principle, .principle:nth-child(2n) { min-height: 20rem; border-right: 0; }
    .site-footer { flex-direction: column; gap: 0.5rem; }
}

@media (max-width: 500px) {
    .site-header { padding-top: 0.9rem; }
    .site-nav a[data-nav-section="history"] { display: none; }
    .hero { padding-right: 0.7rem; padding-left: 0.7rem; }
    .hero-frame { padding: 1rem; }
    .hero-frame__content { min-height: 31rem; padding-right: 0; padding-left: 0; }
    .hero-frame h1 { font-size: clamp(3.8rem, 20vw, 5.8rem); }
    .hero-frame__meta li:nth-child(3) { display: none; }
    .hero-index { display: none; }
    .section-heading h2 { font-size: clamp(3rem, 15vw, 5rem); }
    .statement h2, .contact-section h2 { font-size: clamp(3.5rem, 18vw, 6rem); }
    .organization-map::before { left: 0; }
    .organization-map::after { display: none; }
    .organization-map__axis--leadership { right: auto; left: 50%; }
    .organization::before { left: -4px; }
    .organization--engineering,
    .organization--leadership { width: 100%; margin-left: 0; }
    .organization__summary { grid-template-columns: 1fr; gap: 0.75rem; padding-left: 1.2rem; }
    .organization__name, .organization__roles { padding: 0; }
    .organization-map__legend { justify-content: flex-start; overflow-x: auto; padding-bottom: 0.5rem; white-space: nowrap; }
}

@media print {
    .site-header, .source-field { display: none !important; }
    body { background: #fff; color: #111; }
    .hero { min-height: auto; }
    .hero-frame { box-shadow: none; }
    .statement, .contact-section, .engine-section { min-height: auto; background: #fff; color: #111; }
    .section, .project { break-inside: avoid; }
}