:root {
    --bg: #080a0d;
    --surface: #101318;
    --surface-soft: #15191f;
    --text: #f3f4f6;
    --muted: #9ba3ae;
    --line: #262c34;
    --accent: #b9ff66;

    --max-width: 1240px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family:
        Inter,
        ui-sans-serif,
        system-ui,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;
    line-height: 1.6;
}

a {
    color: inherit;
    text-decoration: none;
}


/* HEADER */

.site-header {
    width: min(calc(100% - 48px), var(--max-width));
    margin: 0 auto;
    min-height: 84px;

    display: flex;
    align-items: center;
    justify-content: space-between;

    border-bottom: 1px solid var(--line);
}

.brand {
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.brand-main {
    color: var(--text);
}

.brand-mark {
    color: var(--accent);
}

.site-nav {
    display: flex;
    gap: 30px;
}

.site-nav a {
    color: var(--muted);
    font-size: 0.88rem;
    transition: color 160ms ease;
}

.site-nav a:hover {
    color: var(--text);
}


/* HERO */

.hero {
    min-height: calc(100vh - 84px);
    display: flex;
    align-items: center;
}

.hero-inner {
    width: min(calc(100% - 48px), var(--max-width));
    margin: 0 auto;
    padding: 90px 0 110px;
}

.eyebrow {
    margin: 0 0 28px;

    color: var(--accent);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.18em;
}

.hero h1 {
    max-width: 1000px;
    margin: 0;

    font-size: clamp(3.7rem, 8vw, 8.5rem);
    line-height: 0.95;
    letter-spacing: -0.065em;
    font-weight: 650;
}

.hero-question {
    margin: 50px 0 55px;

    color: var(--accent);
    font-size: clamp(1.7rem, 3vw, 3rem);
    line-height: 1.15;
    letter-spacing: -0.035em;
    font-weight: 500;
}

.hero-intro,
.hero-explanation {
    max-width: 760px;
    margin: 0 0 18px;

    color: var(--muted);
    font-size: clamp(1.05rem, 1.5vw, 1.3rem);
}

.hero-intro:nth-of-type(3) {
    color: var(--text);
}

.hero-explanation {
    margin-top: 36px;
}

.hero-focus {
    max-width: 850px;
    margin-top: 55px;
    padding: 32px 0;

    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.focus-label {
    display: block;
    margin-bottom: 11px;

    color: var(--muted);
    font-size: 0.86rem;
}

.hero-focus strong {
    display: block;

    font-size: clamp(1.4rem, 2vw, 2rem);
    line-height: 1.25;
    font-weight: 500;
}

.hero-boundary {
    margin-top: 32px;
    color: var(--muted);
    font-size: 0.95rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;

    margin-top: 45px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;

    min-height: 50px;
    padding: 0 23px;

    border: 1px solid var(--line);
    border-radius: 999px;

    font-size: 0.9rem;
    font-weight: 600;

    transition:
        transform 160ms ease,
        border-color 160ms ease;
}

.button:hover {
    transform: translateY(-2px);
    border-color: var(--muted);
}

.button-primary {
    background: var(--accent);
    color: #080a0d;
    border-color: var(--accent);
}


/* PRESSURE POINTS */

.pressure-section {
    width: min(calc(100% - 48px), var(--max-width));
    margin: 0 auto;
    padding: 130px 0;
}

.section-heading {
    margin-bottom: 70px;
}

.section-heading h2,
.next-section h2 {
    max-width: 900px;
    margin: 0;

    font-size: clamp(2.7rem, 5vw, 5.5rem);
    line-height: 1;
    letter-spacing: -0.055em;
    font-weight: 600;
}

.pressure-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1px;

    background: var(--line);
    border: 1px solid var(--line);
}

.pressure-card {
    position: relative;

    min-height: 330px;
    padding: 38px;

    background: var(--surface);
}

.card-number {
    color: var(--muted);
    font-size: 0.7rem;
    letter-spacing: 0.14em;
}

.pressure-card h3 {
    max-width: 470px;
    margin: 70px 0 25px;

    font-size: clamp(1.6rem, 3vw, 2.7rem);
    line-height: 1.05;
    letter-spacing: -0.04em;
    font-weight: 500;
}

.pressure-card h3 span {
    color: var(--accent);
}

.pressure-card p {
    max-width: 440px;
    margin: 0;

    color: var(--muted);
    font-size: 1rem;
}


/* NEXT PLACEHOLDER */

.next-section {
    width: min(calc(100% - 48px), var(--max-width));
    margin: 0 auto;
    padding: 130px 0;

    border-top: 1px solid var(--line);
}

.next-section > p:last-child {
    color: var(--muted);
}


/* FOOTER */

.site-footer {
    width: min(calc(100% - 48px), var(--max-width));
    margin: 0 auto;
    padding: 40px 0 60px;

    display: flex;
    justify-content: space-between;
    gap: 30px;

    border-top: 1px solid var(--line);

    color: var(--muted);
    font-size: 0.78rem;
}


/* MOBILE */

@media (max-width: 760px) {

    .site-header {
        width: min(calc(100% - 30px), var(--max-width));
    }

    .site-nav {
        display: none;
    }

    .hero-inner,
    .pressure-section,
    .next-section,
    .site-footer {
        width: min(calc(100% - 30px), var(--max-width));
    }

    .hero {
        min-height: auto;
    }

    .hero-inner {
        padding: 85px 0;
    }

    .hero h1 {
        font-size: clamp(3.1rem, 16vw, 5rem);
    }

    .pressure-grid {
        grid-template-columns: 1fr;
    }

    .pressure-card {
        min-height: 280px;
        padding: 30px;
    }

    .pressure-card h3 {
        margin-top: 55px;
    }

    .site-footer {
        flex-direction: column;
    }
}

/* =========================================================
   BREAK TEST AND DOMAINS
   ========================================================= */

.break-section,
.domains-section {
    width: min(calc(100% - 48px), var(--max-width));
    margin: 0 auto;
    padding: 130px 0;
    border-top: 1px solid var(--line);
}

.break-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 90px;
    align-items: start;
}

.break-copy {
    max-width: 540px;
}

.break-copy p {
    margin: 0 0 24px;
    color: var(--muted);
    font-size: 1.08rem;
}

.break-copy p:first-child {
    color: var(--text);
    font-size: 1.25rem;
}

.break-method {
    border-top: 1px solid var(--line);
}

.method-step {
    display: grid;
    grid-template-columns: 48px 200px 1fr;
    gap: 20px;
    padding: 24px 0;
    border-bottom: 1px solid var(--line);
}

.method-step span {
    color: var(--accent);
    font-size: 0.72rem;
}

.method-step strong {
    font-weight: 500;
}

.method-step p {
    margin: 0;
    color: var(--muted);
}

.break-statement {
    max-width: 920px;
    margin-top: 90px;
    padding: 38px 0;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.break-statement span {
    display: block;
    margin-bottom: 10px;
    color: var(--muted);
    font-size: 0.8rem;
}

.break-statement strong {
    display: block;
    font-size: clamp(1.5rem, 2.5vw, 2.6rem);
    line-height: 1.2;
    letter-spacing: -0.035em;
    font-weight: 500;
}

.domain-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1px;
    background: var(--line);
    border: 1px solid var(--line);
}

.domain-card {
    min-height: 360px;
    padding: 38px;
    background: var(--surface);
}

.domain-index {
    color: var(--muted);
    font-size: 0.7rem;
}

.domain-name {
    margin: 65px 0 18px;
    color: var(--accent);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.14em;
}

.domain-card h3 {
    max-width: 500px;
    margin: 0 0 28px;
    font-size: clamp(1.5rem, 2.6vw, 2.5rem);
    line-height: 1.08;
    letter-spacing: -0.035em;
    font-weight: 500;
}

.domain-card > p:last-child {
    max-width: 470px;
    margin: 0;
    color: var(--muted);
}

.convergence-statement {
    max-width: 900px;
    margin-top: 90px;
    padding: 45px 0;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.convergence-statement p {
    max-width: 700px;
    margin: 0 0 15px;
    color: var(--muted);
}

.convergence-statement strong {
    display: block;
    margin: 15px 0 22px;
    color: var(--accent);
    font-size: clamp(1.6rem, 2.8vw, 3rem);
    line-height: 1.15;
    letter-spacing: -0.04em;
    font-weight: 500;
}

@media (max-width: 760px) {

    .break-section,
    .domains-section {
        width: min(calc(100% - 30px), var(--max-width));
        padding: 90px 0;
    }

    .break-grid,
    .domain-grid {
        grid-template-columns: 1fr;
    }

    .break-grid {
        gap: 55px;
    }

    .method-step {
        grid-template-columns: 36px 1fr;
    }

    .method-step p {
        grid-column: 2;
    }

    .domain-card {
        min-height: 300px;
        padding: 30px;
    }
}

/* =========================================================
   MODEL AND MASTER NODE
   ========================================================= */

.model-section,
.master-section {
    width: min(calc(100% - 48px), var(--max-width));
    margin: 0 auto;
    padding: 130px 0;
    border-top: 1px solid var(--line);
}


/* THE MODEL IS NOT THE NODE */

.model-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 90px;
    align-items: start;
}

.model-copy {
    max-width: 560px;
}

.model-copy p {
    margin: 0 0 24px;
    color: var(--muted);
    font-size: 1.08rem;
}

.model-copy p:first-child {
    color: var(--text);
    font-size: 1.24rem;
}

.model-copy strong {
    display: block;
    margin-top: 45px;

    font-size: clamp(1.4rem, 2.2vw, 2.2rem);
    line-height: 1.25;
    letter-spacing: -0.03em;
    font-weight: 500;
}

.model-relations {
    border-top: 1px solid var(--line);
}

.relation-row {
    display: flex;
    justify-content: space-between;
    gap: 30px;

    padding: 24px 0;
    border-bottom: 1px solid var(--line);
}

.relation-row span {
    color: var(--muted);
}

.relation-row strong {
    text-align: right;
    font-weight: 500;
}

.way-back {
    max-width: 930px;
    margin-top: 90px;
    padding: 42px 0;

    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.way-back p {
    margin: 0 0 10px;
    color: var(--muted);
    font-size: 0.82rem;
}

.way-back strong {
    display: block;

    color: var(--accent);
    font-size: clamp(1.8rem, 3.2vw, 3.5rem);
    line-height: 1.1;
    letter-spacing: -0.045em;
    font-weight: 500;
}

.way-back span {
    display: block;
    margin-top: 22px;

    color: var(--muted);
    font-size: 0.9rem;
}


/* NO MASTER NODE */

.master-intro {
    max-width: 760px;
    margin-bottom: 70px;
}

.master-intro p {
    margin: 0 0 22px;
    color: var(--muted);
    font-size: 1.08rem;
}

.master-intro p:first-child {
    color: var(--text);
    font-size: 1.22rem;
}

.master-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1px;

    background: var(--line);
    border: 1px solid var(--line);
}

.master-card {
    min-height: 310px;
    padding: 38px;
    background: var(--surface);
}

.master-card > span {
    color: var(--accent);
    font-size: 0.7rem;
}

.master-card h3 {
    margin: 65px 0 24px;

    font-size: clamp(1.45rem, 2.4vw, 2.3rem);
    line-height: 1.08;
    letter-spacing: -0.035em;
    font-weight: 500;
}

.master-card p {
    max-width: 470px;
    margin: 0;
    color: var(--muted);
}

.master-statement {
    max-width: 900px;
    margin-top: 90px;
    padding: 42px 0;

    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.master-statement p {
    margin: 0 0 17px;
    color: var(--muted);
}

.master-statement strong {
    display: block;

    font-size: clamp(1.8rem, 3vw, 3.2rem);
    line-height: 1.1;
    letter-spacing: -0.04em;
    font-weight: 500;
}


/* MOBILE */

@media (max-width: 760px) {

    .model-section,
    .master-section {
        width: min(calc(100% - 30px), var(--max-width));
        padding: 90px 0;
    }

    .model-grid,
    .master-grid {
        grid-template-columns: 1fr;
    }

    .model-grid {
        gap: 55px;
    }

    .relation-row {
        flex-direction: column;
        gap: 5px;
    }

    .relation-row strong {
        text-align: left;
    }

    .master-card {
        min-height: 280px;
        padding: 30px;
    }
}

/* =========================================================
   CURRENT RESEARCH STATE
   ========================================================= */

.state-section,
.documents-section,
.collaborate-section {
    width: min(calc(100% - 48px), var(--max-width));
    margin: 0 auto;
    padding: 130px 0;
    border-top: 1px solid var(--line);
}

.state-intro,
.documents-intro {
    max-width: 760px;
    margin-bottom: 70px;
}

.state-intro p,
.documents-intro p {
    margin: 0 0 22px;
    color: var(--muted);
    font-size: 1.08rem;
}

.state-intro p:first-child,
.documents-intro p:first-child {
    color: var(--text);
    font-size: 1.22rem;
}

.state-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1px;
    background: var(--line);
    border: 1px solid var(--line);
}

.state-card {
    min-height: 360px;
    padding: 38px;
    background: var(--surface);
}

.state-card-wide {
    grid-column: 1 / -1;
}

.state-index {
    color: var(--muted);
    font-size: 0.7rem;
}

.state-name {
    margin: 55px 0 17px;
    color: var(--accent);
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.14em;
}

.state-card h3 {
    margin: 0 0 28px;
    font-size: clamp(1.6rem, 2.8vw, 2.7rem);
    line-height: 1.05;
    letter-spacing: -0.04em;
    font-weight: 500;
}

.state-card h3 span {
    color: var(--accent);
}

.state-card > p:not(.state-name):not(.state-note) {
    max-width: 500px;
    margin: 0 0 18px;
}

.state-note {
    max-width: 500px;
    margin: 0;
    color: var(--muted);
}

.state-principle,
.provenance-statement {
    max-width: 950px;
    margin-top: 90px;
    padding: 42px 0;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.state-principle p,
.provenance-statement p {
    margin: 0 0 13px;
    color: var(--muted);
}

.state-principle strong,
.provenance-statement strong {
    display: block;
    color: var(--accent);
    font-size: clamp(1.7rem, 3vw, 3.1rem);
    line-height: 1.15;
    letter-spacing: -0.04em;
    font-weight: 500;
}


/* DOCUMENTS / PROVENANCE */

.provenance-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--line);
    border: 1px solid var(--line);
}

.provenance-card {
    min-height: 260px;
    padding: 32px;
    background: var(--surface);
}

.provenance-card > span {
    color: var(--accent);
    font-size: 0.7rem;
}

.provenance-card h3 {
    margin: 55px 0 20px;
    font-size: 1.65rem;
    font-weight: 500;
}

.provenance-card p {
    margin: 0;
    color: var(--muted);
}


/* COLLABORATE */

.collaborate-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 90px;
    align-items: start;
}

.collaborate-copy {
    max-width: 560px;
}

.collaborate-copy p {
    margin: 0 0 24px;
    color: var(--muted);
    font-size: 1.08rem;
}

.collaborate-copy p:first-child {
    color: var(--text);
    font-size: 1.22rem;
}

.collaborate-copy strong {
    display: block;
    margin-top: 45px;
    color: var(--accent);
    font-size: clamp(1.5rem, 2.4vw, 2.5rem);
    line-height: 1.2;
    letter-spacing: -0.035em;
    font-weight: 500;
}

.collaborate-list {
    border-top: 1px solid var(--line);
}

.collaborate-item {
    display: grid;
    grid-template-columns: 45px 1fr;
    gap: 20px;
    padding: 21px 0;
    border-bottom: 1px solid var(--line);
}

.collaborate-item span {
    color: var(--accent);
    font-size: 0.7rem;
}

.collaborate-item p {
    margin: 0;
}

.contact-block {
    margin-top: 90px;
    padding: 42px 0;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.contact-block p {
    margin: 0 0 15px;
    color: var(--muted);
}

.contact-block a {
    color: var(--text);
    font-size: clamp(1.5rem, 3vw, 3rem);
    letter-spacing: -0.04em;
}

.contact-block a:hover {
    color: var(--accent);
}

.closing-statement {
    padding: 140px 0 30px;
}

.closing-statement p {
    margin: 0 0 14px;
    color: var(--muted);
}

.closing-statement strong {
    display: block;
    color: var(--accent);
    font-size: clamp(2.2rem, 5vw, 5.5rem);
    line-height: 1;
    letter-spacing: -0.055em;
    font-weight: 550;
}


/* MOBILE */

@media (max-width: 760px) {

    .state-section,
    .documents-section,
    .collaborate-section {
        width: min(calc(100% - 30px), var(--max-width));
        padding: 90px 0;
    }

    .state-grid,
    .provenance-grid {
        grid-template-columns: 1fr;
    }

    .state-card,
    .state-card-wide {
        grid-column: auto;
        min-height: 300px;
        padding: 30px;
    }

    .provenance-card {
        min-height: 230px;
    }

    .collaborate-grid {
        grid-template-columns: 1fr;
        gap: 55px;
    }

    .closing-statement {
        padding-top: 100px;
    }
}

/* =========================================================
   LEGAL / PRIVACY
   ========================================================= */

.legal-header {
    width: min(calc(100% - 48px), 1240px);
    min-height: 84px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--line);
}

.legal-back {
    color: var(--muted);
    font-size: .85rem;
}

.legal-main {
    width: min(calc(100% - 48px), 980px);
    margin: 0 auto;
    padding: 110px 0 140px;
}

.legal-main > h1 {
    max-width: 850px;
    margin: 0 0 100px;
    font-size: clamp(3.2rem, 7vw, 7rem);
    line-height: .96;
    letter-spacing: -.055em;
    font-weight: 600;
}

.legal-block {
    padding: 42px 0;
    border-top: 1px solid var(--line);
}

.legal-block h2 {
    margin: 0 0 24px;
    color: var(--accent);
    font-size: .76rem;
    letter-spacing: .14em;
    font-weight: 700;
    text-transform: uppercase;
}

.legal-block p {
    max-width: 760px;
    margin: 0 0 18px;
    color: var(--muted);
    font-size: 1.03rem;
}

.legal-block a {
    color: var(--text);
    text-decoration: underline;
    text-decoration-color: var(--line);
    text-underline-offset: 4px;
}

.legal-status {
    margin-top: 75px;
    padding: 45px 0;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.legal-status p {
    margin: 0 0 12px;
    color: var(--muted);
}

.legal-status strong {
    display: block;
    color: var(--accent);
    font-size: clamp(1.6rem, 3vw, 3rem);
    line-height: 1.15;
    letter-spacing: -.04em;
    font-weight: 500;
}

.legal-footer {
    width: min(calc(100% - 48px), 1240px);
    margin: 0 auto;
    padding: 40px 0 60px;
    display: flex;
    gap: 25px;
    flex-wrap: wrap;
    border-top: 1px solid var(--line);
    color: var(--muted);
    font-size: .8rem;
}

.legal-footer a:hover,
.legal-back:hover,
.legal-block a:hover {
    color: var(--accent);
}

@media (max-width: 760px) {
    .legal-header,
    .legal-main,
    .legal-footer {
        width: min(calc(100% - 30px), 980px);
    }

    .legal-main {
        padding: 80px 0 100px;
    }

    .legal-main > h1 {
        margin-bottom: 70px;
    }
}