:root {
    --ink: #13232d;
    --muted: #5f7078;
    --paper: #f5f4ef;
    --white: #fffefa;
    --navy: #101f2b;
    --navy-2: #172d38;
    --teal: #087e78;
    --teal-soft: #dcefeb;
    --lime: #d5ed87;
    --line: #d9ddd7;
    --amber: #e9b85d;
    --serif: Georgia, "Times New Roman", serif;
    --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --shadow: 0 18px 48px rgba(16, 31, 43, .08);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 86px;
}

body {
    margin: 0;
    color: var(--ink);
    background: var(--paper);
    font: 16px/1.65 var(--sans);
}

a {
    color: inherit;
}

.skip {
    position: fixed;
    top: -60px;
    left: 1rem;
    z-index: 20;
    background: var(--white);
    padding: .7rem 1rem;
    border-radius: 8px;
}

.skip:focus {
    top: 1rem;
}

.topbar {
    position: sticky;
    top: 0;
    z-index: 10;
    background: rgba(16, 31, 43, .97);
    color: white;
    border-bottom: 1px solid rgba(255, 255, 255, .12);
    backdrop-filter: blur(14px);
}

.nav {
    max-width: 1180px;
    height: 70px;
    margin: auto;
    padding: 0 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 11px;
    text-decoration: none;
    font-weight: 750;
    letter-spacing: -.03em;
    white-space: nowrap;
}

.brand-mark {
    width: 31px;
    height: 31px;
    display: grid;
    place-items: center;
    background: var(--lime);
    color: var(--navy);
    border-radius: 9px;
    font-size: 17px;
}

.navlinks {
    display: flex;
    gap: 24px;
    align-items: center;
    font-size: 13px;
    color: #d7e0dd;
}

.navlinks a {
    text-decoration: none;
    transition: color .2s;
}

.navlinks a:hover, .navlinks a:focus {
    color: var(--lime);
}

.language-toggle {
    border: 1px solid rgba(255, 255, 255, .35);
    background: transparent;
    color: white;
    border-radius: 6px;
    padding: 7px 10px;
    font: 700 11px var(--sans);
    cursor: pointer;
    white-space: nowrap;
}

.language-toggle:hover, .language-toggle:focus-visible {
    color: var(--navy);
    background: var(--lime);
    border-color: var(--lime);
}

.hero {
    overflow: hidden;
    position: relative;
    background: var(--navy);
    color: #f8f7f0;
}

.hero:before {
    content: "";
    position: absolute;
    width: 640px;
    height: 640px;
    border: 1px solid rgba(213, 237, 135, .16);
    border-radius: 50%;
    top: -330px;
    right: -95px;
    box-shadow: 0 0 0 70px rgba(213, 237, 135, .035), 0 0 0 145px rgba(213, 237, 135, .025);
}

.hero-inner {
    position: relative;
    max-width: 1180px;
    margin: auto;
    padding: 88px 28px 82px;
    display: grid;
    grid-template-columns: 1.15fr .85fr;
    gap: 65px;
    align-items: center;
}

.eyebrow {
    color: var(--lime);
    text-transform: uppercase;
    letter-spacing: .16em;
    font-size: 11px;
    font-weight: 800;
}

h1 {
    font: 500 clamp(45px, 6.5vw, 78px)/.99 var(--serif);
    letter-spacing: -.055em;
    margin: 24px 0;
    max-width: 730px;
}

h1 em {
    color: var(--lime);
    font-style: normal;
}

.hero-copy {
    max-width: 660px;
    color: #c5d0cc;
    font-size: 17px;
}

.hero-actions {
    display: flex;
    gap: 12px;
    margin-top: 30px;
    flex-wrap: wrap;
}

.button {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    padding: 12px 17px;
    border-radius: 7px;
    text-decoration: none;
    font-size: 13px;
    font-weight: 750;
    transition: transform .2s, background .2s;
}

.button:hover {
    transform: translateY(-2px);
}

.button.primary {
    color: var(--navy);
    background: var(--lime);
}

.button.ghost {
    border: 1px solid rgba(255, 255, 255, .27);
    color: white;
}

.hero-art {
    position: relative;
    min-height: 340px;
    display: grid;
    place-items: center;
}

.orbit {
    width: 300px;
    height: 300px;
    border: 1px solid rgba(213, 237, 135, .4);
    border-radius: 50%;
    position: absolute;
}

.orbit:before, .orbit:after {
    content: "";
    position: absolute;
    border: 1px solid rgba(213, 237, 135, .25);
    border-radius: 50%;
    inset: 27px;
}

.orbit:after {
    inset: 57px;
}

.orbit-dot {
    position: absolute;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--lime);
    box-shadow: 0 0 20px var(--lime);
}

.dot-a {
    top: 43px;
    left: 71px;
}

.dot-b {
    right: 15px;
    top: 166px;
    width: 8px;
    height: 8px;
    background: var(--amber);
    box-shadow: 0 0 18px var(--amber);
}

.core {
    z-index: 1;
    width: 118px;
    height: 118px;
    border-radius: 28px;
    background: #203c43;
    border: 1px solid rgba(213, 237, 135, .5);
    display: grid;
    place-items: center;
    font-size: 45px;
    color: var(--lime);
    box-shadow: 0 20px 80px rgba(0, 0, 0, .3);
    transform: rotate(-7deg);
}

.float-label {
    position: absolute;
    padding: 9px 12px;
    background: rgba(255, 254, 250, .08);
    border: 1px solid rgba(255, 255, 255, .16);
    color: #edf4ed;
    border-radius: 7px;
    font-size: 11px;
    backdrop-filter: blur(8px);
}

.label-a {
    top: 24px;
    right: 3px;
}

.label-b {
    left: -3px;
    top: 142px;
}

.label-c {
    right: 0;
    bottom: 29px;
}

.hero-meta {
    margin-top: 42px;
    padding-top: 18px;
    border-top: 1px solid rgba(255, 255, 255, .17);
    display: flex;
    gap: 32px;
    color: #aab9b5;
    font-size: 12px;
}

.hero-meta strong {
    display: block;
    color: white;
    font-size: 19px;
    font-weight: 650;
}

main {
    max-width: 1180px;
    margin: auto;
    padding: 0 28px;
}

.section {
    padding: 88px 0;
    border-bottom: 1px solid var(--line);
}

.section-heading {
    display: grid;
    grid-template-columns: .38fr 1fr;
    gap: 26px;
    margin-bottom: 38px;
    align-items: start;
}

.kicker {
    color: var(--teal);
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: .13em;
    font-size: 11px;
    padding-top: 11px;
}

h2 {
    font: 500 clamp(34px, 4.3vw, 52px)/1.05 var(--serif);
    letter-spacing: -.045em;
    margin: 0;
}

.section-intro {
    color: var(--muted);
    max-width: 720px;
    margin: 14px 0 0;
}

.abstract {
    display: grid;
    grid-template-columns: 1.2fr .8fr;
    gap: 32px;
    align-items: stretch;
}

.abstract-copy {
    padding: 31px 34px;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 13px;
    box-shadow: var(--shadow);
}

.abstract-copy p:first-child {
    margin-top: 0;
}

.abstract-copy p:last-child {
    margin-bottom: 0;
}

.abstract-quote {
    background: var(--teal);
    border-radius: 13px;
    color: white;
    padding: 32px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.quote-mark {
    font: 60px/1 var(--serif);
    color: var(--lime);
}

.abstract-quote blockquote {
    margin: 18px 0;
    font: 25px/1.3 var(--serif);
    letter-spacing: -.025em;
}

.abstract-quote small {
    color: #d4e8df;
    font-size: 11px;
}

.pill-row {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 20px;
}

.pill {
    padding: 6px 11px;
    border: 1px solid #cbd9d4;
    color: var(--teal);
    border-radius: 99px;
    font-size: 11px;
    font-weight: 700;
}

.dimensions {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.dimension {
    position: relative;
    padding: 27px;
    min-height: 234px;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 12px;
    overflow: hidden;
}

.dimension:after {
    content: attr(data-num);
    position: absolute;
    right: 16px;
    bottom: -30px;
    font: 120px/1 var(--serif);
    color: rgba(8, 126, 120, .07);
}

.dimension-icon {
    width: 42px;
    height: 42px;
    border-radius: 11px;
    background: var(--teal-soft);
    color: var(--teal);
    display: grid;
    place-items: center;
    font-size: 20px;
}

.dimension h3 {
    font-size: 19px;
    margin: 18px 0 8px;
    letter-spacing: -.03em;
}

.dimension p {
    margin: 0;
    color: var(--muted);
    font-size: 14px;
    max-width: 320px;
}

.callout {
    margin-top: 20px;
    padding: 17px 20px;
    background: #edf2e0;
    border-left: 3px solid var(--teal);
    color: #3f514e;
    font-size: 13px;
}

.questions {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
}

.question {
    border-top: 2px solid var(--teal);
    padding: 20px 21px 23px;
    background: rgba(255, 254, 250, .7);
}

.question span {
    font-size: 11px;
    color: var(--teal);
    font-weight: 800;
    letter-spacing: .12em;
    text-transform: uppercase;
}

.question p {
    margin: 12px 0 0;
    font: 19px/1.4 var(--serif);
}

.method-layout {
    display: grid;
    grid-template-columns: .85fr 1.15fr;
    gap: 42px;
    align-items: start;
}

.method-note {
    background: var(--navy);
    color: white;
    padding: 30px;
    border-radius: 12px;
}

.method-note h3 {
    margin: 0 0 12px;
    font: 27px var(--serif);
}

.method-note p {
    color: #c4d1ce;
    font-size: 14px;
}

.method-note .badge {
    color: var(--lime);
    font-size: 11px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: .12em;
}

.steps {
    counter-reset: step;
    list-style: none;
    margin: 0;
    padding: 0;
}

.steps li {
    counter-increment: step;
    position: relative;
    padding: 0 0 23px 56px;
    border-left: 1px solid #b6c9c2;
    margin-left: 18px;
}

.steps li:last-child {
    border-left-color: transparent;
    padding-bottom: 0;
}

.steps li:before {
    content: "0" counter(step);
    position: absolute;
    left: -19px;
    top: 0;
    width: 37px;
    height: 37px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    color: var(--teal);
    background: var(--teal-soft);
    font-size: 11px;
    font-weight: 800;
}

.steps strong {
    display: block;
    margin-bottom: 4px;
}

.steps p {
    margin: 0;
    color: var(--muted);
    font-size: 14px;
}

.tool-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 13px;
}

.tool-card {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 21px;
    min-height: 218px;
    transition: transform .2s, box-shadow .2s;
}

.tool-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
}

.tool-card .index {
    color: var(--teal);
    font-size: 11px;
    font-weight: 800;
    letter-spacing: .1em;
}

.tool-card h3 {
    margin: 13px 0 8px;
    font-size: 18px;
    letter-spacing: -.03em;
}

.tool-card p {
    color: var(--muted);
    font-size: 13px;
    margin: 0;
}

.tool-tag {
    margin-top: 16px;
    display: inline-block;
    color: #47615d;
    background: #e8f1e8;
    padding: 5px 8px;
    border-radius: 4px;
    font-size: 10px;
    font-weight: 700;
}

.matrix-wrap {
    overflow-x: auto;
    border: 1px solid var(--line);
    border-radius: 11px;
    background: var(--white);
}

table {
    width: 100%;
    border-collapse: collapse;
    table-layout: fixed;
    min-width: 740px;
    font-size: 13px;
}

th {
    background: var(--navy);
    color: white;
    padding: 15px 17px;
    text-align: left;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: .08em;
}

td {
    padding: 14px 17px;
    border-top: 1px solid var(--line);
    vertical-align: top;
    color: #46575d;
}

td:first-child {
    color: var(--ink);
    font-weight: 750;
    white-space: nowrap;
}

tr:hover td {
    background: #f2f7f2;
}

.status {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    color: #43635e;
    font-size: 11px;
    font-weight: 750;
}

.status:before {
    content: "";
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--teal);
}

.status.pending:before {
    background: var(--amber);
}

.status.focus:before {
    background: #819a53;
}

.table-note {
    display: flex;
    gap: 18px;
    flex-wrap: wrap;
    padding: 15px 18px;
    font-size: 11px;
    color: var(--muted);
}

.legend {
    display: inline-flex;
    align-items: center;
    gap: 7px;
}

.legend i {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--teal);
}

.legend.pending i {
    background: var(--amber);
}

.legend.focus i {
    background: #819a53;
}

.insight {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 26px;
    margin-top: 35px;
}

.insight-panel {
    padding: 29px;
    border-radius: 11px;
    background: var(--teal-soft);
}

.insight-panel.dark {
    background: var(--navy-2);
    color: white;
}

.insight-panel h3 {
    font: 25px var(--serif);
    margin: 0 0 12px;
}

.insight-panel p {
    font-size: 14px;
    margin: 0;
}

.insight-panel.dark p {
    color: #c4d1ce;
}

.layers {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 8px;
    margin-top: 22px;
}

.layer {
    min-height: 110px;
    padding: 13px;
    background: rgba(255, 255, 255, .08);
    border: 1px solid rgba(255, 255, 255, .12);
    border-radius: 7px;
}

.layer b {
    display: block;
    color: var(--lime);
    font-size: 11px;
    margin-bottom: 8px;
}

.layer span {
    color: #d4dfdb;
    font-size: 11px;
    line-height: 1.35;
    display: block;
}

.test-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 35px;
}

.test-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.test-item {
    padding: 15px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--white);
    font-size: 13px;
}

.test-item strong {
    display: block;
    font-size: 14px;
    margin-bottom: 4px;
}

.test-item span {
    color: var(--muted);
    font-size: 11px;
}

.conclusion {
    background: var(--navy);
    color: white;
    border-radius: 15px;
    padding: clamp(28px, 5vw, 60px);
    display: grid;
    grid-template-columns: .7fr 1.3fr;
    gap: 38px;
    align-items: start;
}

.conclusion .eyebrow {
    color: var(--lime);
}

.conclusion h2 {
    margin-top: 17px;
    font-size: 39px;
}

.conclusion p {
    color: #d1dbd7;
    margin: 0 0 17px;
}

.conclusion .thesis {
    color: white;
    font: 24px/1.4 var(--serif);
}

.refs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

details {
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--white);
}

summary {
    cursor: pointer;
    padding: 14px 16px;
    font-size: 13px;
    font-weight: 750;
    list-style: none;
    display: flex;
    justify-content: space-between;
    gap: 14px;
}

summary::-webkit-details-marker {
    display: none;
}

summary:after {
    content: "+";
    color: var(--teal);
    font-size: 18px;
    line-height: 1;
}

details[open] summary:after {
    content: "−";
}

.ref-body {
    padding: 0 16px 15px;
    color: var(--muted);
    font-size: 12px;
}

.ref-body a {
    color: var(--teal);
    overflow-wrap: anywhere;
}

footer {
    margin-top: 70px;
    background: var(--navy);
    color: #c6d2ce;
}

.footer-inner {
    max-width: 1180px;
    margin: auto;
    padding: 32px 28px;
    display: flex;
    justify-content: space-between;
    gap: 20px;
    align-items: center;
    font-size: 11px;
}

.footer-inner strong {
    color: white;
}

.backtop {
    text-decoration: none;
    color: var(--lime);
}

@media (max-width: 900px) {
    .hero-inner {
        grid-template-columns: 1fr .65fr;
        gap: 15px;
    }

    .hero-art {
        transform: scale(.8);
    }

    .tool-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .layers {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 680px) {
    .nav {
        padding: 9px 18px;
        height: auto;
        min-height: 62px;
        flex-wrap: wrap;
        row-gap: 8px;
    }

    .navlinks {
        flex: 1 0 100%;
        width: 100%;
        gap: 8px 13px;
        overflow: visible;
        white-space: normal;
        flex-wrap: wrap;
        justify-content: flex-start;
        font-size: 10px;
    }

    .language-toggle {
        margin-left: auto;
    }

    .brand {
        font-size: 13px;
    }

    .brand-mark {
        flex: 0 0 31px;
    }

    .hero-inner {
        display: block;
        padding: 66px 22px 48px;
    }

    .hero-art {
        display: none;
    }

    h1 {
        font-size: clamp(46px, 13vw, 68px);
    }

    .hero-copy {
        font-size: 15px;
    }

    .hero-meta {
        gap: 20px;
    }

    main {
        padding: 0 20px;
    }

    .section {
        padding: 66px 0;
    }

    .section-heading {
        display: block;
        margin-bottom: 28px;
    }

    .kicker {
        margin-bottom: 16px;
    }

    .abstract, .method-layout, .insight, .test-grid, .conclusion {
        grid-template-columns: 1fr;
        gap: 18px;
    }

    .dimensions, .questions {
        grid-template-columns: 1fr;
    }

    .dimension {
        min-height: 195px;
    }

    .tool-grid {
        grid-template-columns: 1fr 1fr;
        gap: 9px;
    }

    .tool-card {
        padding: 16px;
        min-height: 225px;
    }

    .tool-card h3 {
        font-size: 16px;
    }

    .tool-card p {
        font-size: 12px;
    }

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

    .layer:last-child {
        grid-column: span 2;
    }

    .test-list {
        grid-template-columns: 1fr;
    }

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

    .conclusion h2 {
        font-size: 33px;
    }

    .footer-inner {
        padding: 24px 20px;
        align-items: start;
        flex-direction: column;
    }
}

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

    *, *:before, *:after {
        transition-duration: .01ms !important;
        animation-duration: .01ms !important;
    }
}