:root {
    --paper: #f3f5f7;
    --paper-light: #ffffff;
    --ink: #101820;
    --ink-soft: #47545f;
    --field: #071926;
    --field-light: #12354a;
    --evidence: #166c5d;
    --risk: #b42318;
    --focus: #1d4ed8;
    --trace: #8aa0ad;
    --line: rgba(16, 24, 32, 0.16);
    --line-dark: rgba(255, 255, 255, 0.17);
    --sans: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
    --shadow: 0 24px 70px rgba(16, 32, 48, 0.15);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--sans);
    font-size: 16px;
    line-height: 1.65;
    overflow-x: hidden;
}

body::selection {
    background: #cedce5;
    color: var(--ink);
}

a {
    color: inherit;
}

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

.skip-link {
    position: fixed;
    left: 1rem;
    top: -5rem;
    z-index: 1000;
    padding: 0.75rem 1rem;
    background: var(--ink);
    color: white;
    border-radius: 999px;
    transition: top 160ms ease;
}

.skip-link:focus {
    top: 1rem;
}

.ambient-grid {
    position: absolute;
    inset: 0 0 auto;
    height: 56rem;
    z-index: -1;
    pointer-events: none;
    opacity: 0.54;
    background-image:
        linear-gradient(rgba(16, 24, 32, 0.055) 1px, transparent 1px),
        linear-gradient(90deg, rgba(16, 24, 32, 0.055) 1px, transparent 1px);
    background-size: 64px 64px;
    mask-image: linear-gradient(to bottom, black 35%, transparent 95%);
}

.container {
    width: min(100% - 3rem, 1240px);
    margin-inline: auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid transparent;
    transition: background 180ms ease, border-color 180ms ease;
}

.site-header.scrolled {
    background: rgba(243, 245, 247, 0.92);
    border-color: var(--line);
    backdrop-filter: blur(18px);
}

.nav-shell {
    min-height: 84px;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 2rem;
}

.brand {
    width: max-content;
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    color: var(--ink);
    font-weight: 700;
    letter-spacing: -0.03em;
    text-decoration: none;
}

.brand-mark {
    width: 25px;
    height: 25px;
    display: grid;
    place-items: center;
    border: 1.5px solid currentColor;
    border-radius: 50%;
}

.brand-mark span {
    width: 9px;
    height: 9px;
    display: block;
    background: var(--ink);
    border-radius: 50%;
    transform: translate(3px, -2px);
}

.nav-links {
    display: flex;
    gap: clamp(1.25rem, 3vw, 2.5rem);
}

.nav-links a,
.nav-action {
    font-family: var(--mono);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-decoration: none;
    text-transform: uppercase;
}

.nav-links a {
    color: var(--ink-soft);
}

.nav-links a:hover,
.nav-links a:focus-visible {
    color: var(--ink);
}

.nav-action {
    justify-self: end;
    padding: 0.65rem 0;
    border-bottom: 1px solid var(--ink);
}

.nav-action span {
    color: var(--ink-soft);
}

.hero {
    padding: clamp(4.5rem, 8vw, 8rem) 0 clamp(5rem, 8vw, 8rem);
}

.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.12fr) minmax(360px, 0.88fr);
    align-items: center;
    gap: clamp(3rem, 7vw, 7rem);
}

.eyebrow,
.section-kicker {
    margin: 0 0 1.5rem;
    color: var(--ink-soft);
    font-family: var(--mono);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.eyebrow {
    display: flex;
    align-items: center;
    gap: 0.65rem;
}

.eyebrow span {
    width: 8px;
    height: 8px;
    display: inline-block;
    background: var(--ink-soft);
    border-radius: 50%;
    box-shadow: 0 0 0 5px rgba(71, 84, 95, 0.11);
}

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

h1,
h2 {
    font-family: var(--sans);
    font-weight: 600;
}

h1 {
    max-width: 820px;
    margin-bottom: 1.8rem;
    font-size: clamp(4.1rem, 7.6vw, 7.8rem);
    letter-spacing: -0.02em;
    line-height: 0.94;
}

h1 em {
    display: block;
    color: var(--evidence);
    font-weight: 500;
}

.hero-lede {
    max-width: 690px;
    margin-bottom: 2.2rem;
    color: var(--ink-soft);
    font-size: clamp(1.05rem, 1.7vw, 1.3rem);
    line-height: 1.65;
}

.hero-actions {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.4rem;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 52px;
    padding: 0.85rem 1.3rem;
    border-radius: 0;
    font-family: var(--mono);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-decoration: none;
    text-transform: uppercase;
    transition: transform 180ms ease, background 180ms ease;
}

.button-primary {
    background: var(--field);
    color: white;
    box-shadow: 0 12px 30px rgba(7, 25, 38, 0.18);
}

.button-primary:hover,
.button-primary:focus-visible {
    background: #020c13;
    transform: translateY(-2px);
}

.text-link {
    display: inline-flex;
    gap: 0.55rem;
    align-items: center;
    color: var(--ink);
    font-size: 0.84rem;
    font-weight: 700;
    text-underline-offset: 0.28rem;
}

.text-link span {
    color: var(--ink-soft);
}

.hero-facts {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin: 4rem 0 0;
    padding-top: 1.25rem;
    border-top: 1px solid var(--line);
}

.hero-facts div {
    min-width: 0;
}

.hero-facts dt {
    margin-bottom: 0.25rem;
    color: #7d8985;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    font-family: var(--mono);
}

.hero-facts dd {
    margin: 0;
    font-size: 0.88rem;
    font-weight: 600;
}

.charter-card {
    position: relative;
    padding: clamp(1.5rem, 3vw, 2.2rem);
    overflow: hidden;
    background: var(--field);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 0;
    box-shadow: var(--shadow);
}

.charter-card::after {
    display: none;
}

.charter-topline {
    position: relative;
    z-index: 1;
    display: flex;
    justify-content: space-between;
    color: rgba(255, 255, 255, 0.62);
    font-size: 0.67rem;
    font-weight: 700;
    letter-spacing: 0.13em;
    text-transform: uppercase;
    font-family: var(--mono);
}

.signal-visual {
    position: relative;
    margin: 2.3rem -0.5rem 2rem;
}

.signal-visual svg {
    width: 100%;
    height: auto;
    overflow: visible;
}

.grid-line {
    fill: none;
    stroke: rgba(255, 255, 255, 0.1);
    stroke-width: 1;
}

.signal-fill {
    fill: url(#signalFill);
}

.signal-line {
    fill: none;
    stroke: var(--trace);
    stroke-width: 4;
    stroke-linecap: round;
}

.signal-visual circle {
    fill: var(--trace);
    stroke: white;
    stroke-width: 3;
}

.visual-caption {
    display: block;
    color: rgba(255, 255, 255, 0.54);
    font-size: 0.64rem;
    letter-spacing: 0.05em;
}

.charter-list {
    display: grid;
    gap: 0;
    border-top: 1px solid var(--line-dark);
}

.charter-list > div {
    display: grid;
    grid-template-columns: 2rem 1fr;
    gap: 0.75rem;
    padding: 1rem 0;
    border-bottom: 1px solid var(--line-dark);
}

.charter-list .index {
    color: rgba(255, 255, 255, 0.54);
    font-family: var(--mono);
    font-size: 0.72rem;
    font-weight: 700;
}

.charter-list p {
    margin: 0;
    color: rgba(255, 255, 255, 0.66);
    font-size: 0.81rem;
    line-height: 1.55;
}

.charter-list strong {
    color: white;
}

.principle-strip {
    padding: 1.2rem 0;
    border-block: 1px solid var(--line);
}

.principle-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1.25rem;
    color: var(--ink-soft);
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.11em;
    text-transform: uppercase;
    font-family: var(--mono);
}

.principle-row span[aria-hidden] {
    color: var(--ink-soft);
    font-size: 0.5rem;
}

.section {
    padding: clamp(6rem, 10vw, 10rem) 0;
}

.section-heading {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(260px, 0.6fr);
    gap: 4rem;
    align-items: end;
    margin-bottom: 4rem;
}

.section-heading h2,
.about h2,
.manifesto h2 {
    max-width: 820px;
    margin: 0;
    font-size: clamp(3rem, 5.5vw, 5.4rem);
    letter-spacing: -0.02em;
    line-height: 0.98;
}

.section-heading > p,
.about-copy > p {
    color: var(--ink-soft);
}

.research-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
}

.research-card {
    min-height: 460px;
    display: flex;
    flex-direction: column;
    padding: clamp(1.5rem, 3vw, 2.2rem);
    background: rgba(255, 255, 255, 0.72);
    border: 1px solid var(--line);
    border-radius: 0;
    transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.research-card:hover {
    transform: translateY(-5px);
    background: var(--paper-light);
    border-color: rgba(21, 35, 32, 0.34);
}

.research-card.invitation {
    background: #e4e9ed;
}

.card-meta {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    min-height: 2.25rem;
    color: #71807b;
    font-size: 0.63rem;
    font-weight: 700;
    letter-spacing: 0.09em;
    text-transform: uppercase;
    font-family: var(--mono);
}

.status {
    color: var(--ink-soft);
    text-align: right;
}

.research-card h3 {
    margin: 3.5rem 0 1rem;
    font-family: var(--sans);
    font-size: clamp(2.3rem, 4vw, 3.5rem);
    font-weight: 500;
    letter-spacing: -0.015em;
}

.research-card .question {
    margin-bottom: 1.25rem;
    color: var(--ink);
    font-size: 1.05rem;
    font-weight: 700;
    line-height: 1.45;
}

.research-card > p:not(.question) {
    color: var(--ink-soft);
    font-size: 0.9rem;
}

.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    margin: auto 0 0;
    padding: 2rem 0 0;
    list-style: none;
}

.tag-list li {
    padding: 0.4rem 0.65rem;
    border: 1px solid var(--line);
    border-radius: 0;
    font-family: var(--mono);
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.04em;
}

.manifesto {
    padding: clamp(6rem, 11vw, 10rem) 0;
    background: var(--field);
    color: white;
}

.manifesto-grid {
    display: grid;
    grid-template-columns: minmax(0, 0.95fr) minmax(380px, 0.75fr);
    gap: clamp(4rem, 10vw, 9rem);
    align-items: start;
}

.section-kicker.light {
    color: #aab7c1;
}

.manifesto-copy > p:last-child {
    max-width: 700px;
    margin-top: 2rem;
    color: rgba(255, 255, 255, 0.66);
    font-size: 1.05rem;
}

.principles-list {
    margin: 0;
    padding: 0;
    list-style: none;
    border-top: 1px solid var(--line-dark);
}

.principles-list li {
    display: grid;
    grid-template-columns: 2.2rem 1fr;
    gap: 1rem;
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--line-dark);
}

.principles-list > li > span {
    color: rgba(255, 255, 255, 0.54);
    font-family: var(--mono);
    font-size: 0.7rem;
    font-weight: 700;
}

.principles-list h3 {
    margin: 0 0 0.3rem;
    font-family: var(--sans);
    font-size: 1.7rem;
    font-weight: 500;
}

.principles-list p {
    margin: 0;
    color: rgba(255, 255, 255, 0.62);
    font-size: 0.87rem;
}

.about-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(320px, 0.7fr);
    gap: clamp(3rem, 9vw, 8rem);
    align-items: start;
}

.about-copy {
    padding-top: 2.6rem;
}

.text-link.dark {
    margin-top: 1rem;
}

.inquiry {
    background: var(--field);
    color: white;
}

.inquiry-grid {
    display: grid;
    grid-template-columns: minmax(0, 0.82fr) minmax(440px, 1.18fr);
    gap: clamp(3rem, 8vw, 7rem);
    align-items: start;
}

.inquiry-copy {
    position: sticky;
    top: 7rem;
}

.inquiry-copy h2 {
    margin: 0 0 1.5rem;
    font-family: var(--sans);
    font-size: clamp(3rem, 5vw, 5.5rem);
    font-weight: 500;
    letter-spacing: -0.02em;
    line-height: 0.94;
}

.inquiry-copy > p:not(.section-kicker) {
    color: rgba(255, 255, 255, 0.68);
}

.inquiry-boundary {
    margin-top: 2rem;
    padding: 1.1rem 1.25rem;
    border-left: 3px solid var(--risk);
    background: rgba(255, 255, 255, 0.06);
    font-size: 0.78rem;
}

.inquiry-boundary strong {
    display: block;
    margin-bottom: 0.35rem;
    color: #f29b91;
}

.inquiry-form-panel {
    padding: clamp(1.5rem, 4vw, 3rem);
    background: var(--paper-light);
    color: var(--ink);
    border: 1px solid rgba(255, 255, 255, 0.22);
    box-shadow: var(--shadow);
}

.inquiry-form-panel form,
.form-field {
    display: grid;
    gap: 0.5rem;
}

.inquiry-form-panel form {
    gap: 1.2rem;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.form-field > span {
    color: var(--ink-soft);
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.09em;
    text-transform: uppercase;
    font-family: var(--mono);
}

.form-field input,
.form-field select,
.form-field textarea {
    width: 100%;
    min-height: 50px;
    padding: 0.85rem 0.95rem;
    background: white;
    color: var(--ink);
    border: 1px solid var(--line);
    border-radius: 0;
    font: inherit;
    transition: border-color 150ms ease, box-shadow 150ms ease;
}

.form-field textarea {
    min-height: 145px;
    resize: vertical;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
    border-color: var(--focus);
    box-shadow: 0 0 0 3px rgba(29, 78, 216, 0.13);
    outline: none;
}

.form-field input[aria-invalid="true"],
.form-field select[aria-invalid="true"],
.form-field textarea[aria-invalid="true"] {
    border-color: var(--risk);
}

.consent-row {
    display: grid;
    grid-template-columns: 1.1rem 1fr;
    gap: 0.75rem;
    align-items: start;
    color: var(--ink-soft);
    cursor: pointer;
    font-size: 0.76rem;
}

.consent-row input {
    width: 1.1rem;
    height: 1.1rem;
    margin-top: 0.2rem;
    accent-color: var(--focus);
}

.form-submit {
    min-height: 52px;
    padding: 0.9rem 1.2rem;
    background: var(--field);
    color: white;
    border: 0;
    font-family: var(--mono);
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.09em;
    text-transform: uppercase;
    cursor: pointer;
}

.form-submit:hover,
.form-submit:focus-visible {
    background: var(--field-light);
}

.form-submit[disabled] {
    cursor: wait;
    opacity: 0.65;
}

.form-status {
    min-height: 1.2rem;
    margin: 0;
    color: var(--ink-soft);
    font-size: 0.76rem;
    font-weight: 700;
}

.form-status.is-success { color: var(--evidence); }
.form-status.is-error { color: var(--risk); }

.honeypot {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

.site-footer {
    padding: 4rem 0;
    background: #e3e7ea;
    border-top: 1px solid var(--line);
}

.footer-grid {
    display: grid;
    grid-template-columns: 0.7fr 1.3fr;
    gap: 4rem;
}

.footer-brand {
    margin-bottom: 1rem;
}

.footer-grid > div:first-child p {
    max-width: 360px;
    color: var(--ink-soft);
    font-size: 0.86rem;
}

.footer-note {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    color: var(--ink-soft);
    font-size: 0.74rem;
}

.footer-note p {
    margin: 0;
}

.footer-note span {
    grid-column: 1 / -1;
    padding-top: 1rem;
    border-top: 1px solid var(--line);
    color: #74807c;
}

.thanks-page {
    min-height: 100vh;
}

.thanks-shell {
    min-height: 100vh;
    display: grid;
    place-items: center;
    width: min(100% - 2rem, 900px);
    margin: 0 auto;
    padding: 3rem 0;
}

.thanks-card {
    padding: clamp(2rem, 7vw, 5rem);
    background: var(--paper-light);
    border: 1px solid var(--line);
    box-shadow: 14px 14px 0 rgba(16, 24, 32, 0.14);
}

.thanks-card .brand {
    margin-bottom: 3rem;
}

.thanks-card h1 {
    margin: 0 0 1.5rem;
    font-size: clamp(3rem, 8vw, 6rem);
}

.thanks-card > p:not(.section-kicker) {
    max-width: 620px;
    margin-bottom: 2rem;
    color: var(--ink-soft);
}

.reveal {
    opacity: 1;
    transform: none;
}

.js .reveal {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 700ms cubic-bezier(0.2, 0.8, 0.2, 1), transform 700ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.js .reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 {
    transition-delay: 100ms !important;
}

.delay-2 {
    transition-delay: 180ms !important;
}

:focus-visible {
    outline: 3px solid var(--focus);
    outline-offset: 4px;
}

@media (max-width: 980px) {
    .hero-grid,
    .manifesto-grid,
    .about-grid,
    .inquiry-grid {
        grid-template-columns: 1fr;
    }

    .inquiry-copy { position: static; }

    .hero-copy {
        max-width: 820px;
    }

    .charter-card {
        max-width: 680px;
    }

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

    .research-card:last-child {
        grid-column: 1 / -1;
        min-height: 380px;
    }
}

@media (max-width: 760px) {
    .container {
        width: min(100% - 2rem, 1240px);
    }

    .nav-shell {
        grid-template-columns: 1fr auto;
        min-height: 72px;
    }

    .nav-links {
        display: none;
    }

    .nav-action {
        font-size: 0.65rem;
    }

    .hero {
        padding-top: 3.75rem;
    }

    h1 {
        font-size: clamp(3.7rem, 17vw, 6rem);
    }

    .hero-facts {
        grid-template-columns: 1fr;
    }

    .hero-facts div {
        display: flex;
        justify-content: space-between;
        gap: 1rem;
        padding-bottom: 0.65rem;
        border-bottom: 1px solid var(--line);
    }

    .section-heading,
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

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

    .form-row {
        grid-template-columns: 1fr;
    }

    .research-card,
    .research-card:last-child {
        grid-column: auto;
        min-height: 430px;
    }

    .principle-row {
        justify-content: center;
        flex-wrap: wrap;
    }

    .principle-row span[aria-hidden] {
        display: none;
    }

    .footer-note {
        grid-template-columns: 1fr;
    }

    .footer-note span {
        grid-column: auto;
    }
}

@media (max-width: 480px) {
    .nav-action {
        padding: 0.55rem 0;
    }

    .hero-actions {
        align-items: flex-start;
        flex-direction: column;
    }

    .button {
        width: 100%;
    }

    .charter-card {
        margin-inline: -0.25rem;
        border-radius: 0;
    }

    .card-meta {
        align-items: flex-start;
        flex-direction: column;
    }

    .status {
        text-align: left;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
    }
}