@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600&family=Playfair+Display:wght@500;600&display=swap');

:root {
  --ink: #20231f;
  --muted: #5e6159;
  --paper: #f2f0eb;
  --line: #d2cfc6;
  --accent: #b8c7b1;
  --deep: #334337;
  --white: #fffdf8;
  --serif: 'Playfair Display', Georgia, serif;
  --sans: 'DM Sans', Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; overflow-x: hidden; background: var(--paper); color: var(--ink); font-family: var(--sans); line-height: 1.55; }
.skip-link { position: absolute; top: -5rem; left: 1rem; z-index: 10; padding: .7rem 1rem; background: var(--ink); color: var(--white); }
.skip-link:focus { top: 1rem; }
.site-header { display: flex; align-items: center; justify-content: space-between; max-width: 1240px; margin: auto; padding: 1.25rem 2.5rem; }
.brand { display: inline-flex; align-items: center; gap: .6rem; color: var(--ink); font-weight: 600; letter-spacing: .02em; text-decoration: none; }
.brand-mark { display: grid; width: 1.8rem; height: 1.8rem; place-items: center; border: 1px solid var(--ink); border-radius: 50%; font: 1.05rem var(--serif); }
.site-header nav { display: flex; align-items: center; gap: 1.8rem; }
.site-header nav a, .text-link { color: var(--ink); font-size: .92rem; text-decoration: none; }
.site-header nav a:not(.nav-cta):hover, .text-link:hover { text-decoration: underline; text-underline-offset: 4px; }
.nav-cta { border: 1px solid var(--ink); border-radius: 2rem; padding: .65rem 1.05rem; }
.nav-cta:hover { background: var(--ink); color: var(--white); }
a:focus-visible { outline: 3px solid #5e775f; outline-offset: 4px; border-radius: 2px; }
.button:focus-visible, .nav-cta:focus-visible { outline-offset: 3px; }

.hero { display: grid; grid-template-columns: .95fr 1.05fr; align-items: center; gap: 3.5rem; max-width: 1240px; min-height: 590px; margin: auto; padding: 5.5rem 2.5rem 4.25rem; }
.eyebrow { margin: 0 0 1rem; color: var(--muted); font-size: .78rem; font-weight: 600; line-height: 1.4; letter-spacing: .14em; text-transform: uppercase; }
.hero h1 { max-width: 720px; margin: 0; font: 600 clamp(3.6rem, 5.8vw, 5.8rem)/.98 var(--serif); letter-spacing: -.052em; }
.hero-lede { max-width: 530px; margin: 1.8rem 0 2rem; color: var(--muted); font-size: 1.12rem; line-height: 1.65; }
.hero-actions { display: flex; align-items: center; gap: 1.5rem; }
.button { display: inline-flex; align-items: center; gap: .75rem; padding: .85rem 1.25rem; border-radius: 2rem; font-size: .9rem; font-weight: 600; text-decoration: none; }
.button-primary { background: var(--deep); color: var(--white); }
.button-primary:hover { background: #253229; }
.button-light { background: var(--white); color: var(--ink); }
.hero-visual { position: relative; display: grid; min-height: 440px; place-items: center; }
.model-diagram {
  width: min(110%, 580px);
  padding: 1.5rem 1.6rem 1.4rem;
  border: 1px solid rgba(51, 67, 55, .2);
  background-color: rgba(255, 253, 248, .74);
  background-image: linear-gradient(rgba(51, 67, 55, .018) 1px, transparent 1px), linear-gradient(90deg, rgba(51, 67, 55, .018) 1px, transparent 1px);
  background-size: 32px 32px;
  box-shadow: 0 24px 70px rgba(46, 54, 44, .09);
}
.model-kicker { margin: 0 0 .8rem; color: var(--deep); font-size: .8rem; font-weight: 600; letter-spacing: .14em; text-align: center; text-transform: uppercase; }
.model-map { position: relative; display: grid; grid-template-columns: 1fr 1fr; grid-template-areas: "built method" "drivers change"; gap: 4.8rem 7.2rem; min-height: 330px; padding: .75rem 0; }
.model-connections { position: absolute; inset: 0; z-index: 1; width: 100%; height: 100%; overflow: visible; }
.model-connections path { fill: none; stroke: rgba(51, 67, 55, .48); stroke-width: 1; vector-effect: non-scaling-stroke; }
.model-outcome-connector { position: absolute; top: calc(50% + 3.35rem); bottom: -.9rem; left: 50%; z-index: 1; width: 1px; background: rgba(51, 67, 55, .48); }
.model-core { position: absolute; top: 50%; left: 50%; z-index: 2; display: grid; width: 6.7rem; height: 6.7rem; margin: 0; place-items: center; transform: translate(-50%, -50%); border: 1px solid var(--deep); border-radius: 50%; background: var(--deep); color: var(--white); font: 500 1.02rem/1.18 var(--serif); letter-spacing: .01em; text-align: center; text-transform: uppercase; }
.model-group { position: relative; z-index: 1; padding: .7rem .8rem .75rem; border: 1px solid rgba(51, 67, 55, .34); background: rgba(255, 253, 248, .96); }
.group-built { grid-area: built; align-self: start; }
.group-method { grid-area: method; align-self: start; }
.group-drivers { grid-area: drivers; align-self: end; }
.group-change { grid-area: change; align-self: end; }
.model-number { display: block; margin-bottom: .22rem; color: #747a70; font-size: .72rem; font-weight: 600; letter-spacing: .1em; }
.model-group h3 { margin: 0 0 .42rem; color: var(--deep); font: 600 .79rem/1.35 var(--sans); letter-spacing: .045em; text-transform: uppercase; }
.model-group ul { margin: 0; padding: 0; color: var(--ink); font-size: .88rem; line-height: 1.5; list-style: none; }
.model-group li + li { margin-top: .08rem; }
.model-outcome { position: relative; width: fit-content; margin: .9rem auto 0; padding: .6rem 1.2rem; border: 1px solid var(--deep); background: var(--white); color: var(--deep); font-size: .77rem; font-weight: 600; letter-spacing: .11em; text-align: center; text-transform: uppercase; }
.model-support { margin: .75rem 0 0; color: var(--muted); font-size: .82rem; line-height: 1.45; text-align: center; }

.construction-figure { max-width: 1380px; margin: 0 auto 1rem; padding: 0 1.5rem; }
.construction-image-wrap { position: relative; overflow: hidden; aspect-ratio: 16 / 5; background: #d8d4cc; }
.construction-image-wrap::after { position: absolute; inset: 0; background: rgba(58, 50, 40, .07); content: ''; pointer-events: none; }
.construction-image-wrap img { display: block; width: 100%; height: 100%; object-fit: cover; object-position: 61% 47%; filter: saturate(.72) sepia(.06) contrast(.96); }
.construction-figure figcaption { margin-top: .75rem; color: var(--muted); font-size: .8rem; line-height: 1.5; }

.section { max-width: 1240px; margin: auto; padding: 6.5rem 2.5rem; }
.product-section { padding-top: 4.75rem; }
.section-intro { display: grid; grid-template-columns: 1fr 2fr; gap: 3rem; }
.section h2 { max-width: 760px; margin: 0; font: 500 clamp(2.3rem, 4vw, 4.2rem)/1.05 var(--serif); letter-spacing: -.04em; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2.5rem; margin-top: 4.8rem; border-top: 1px solid var(--ink); }
.feature-grid article { padding-top: 1rem; }
.feature-number { color: var(--muted); font-size: .8rem; line-height: 1.5; }
.feature-grid h3 { margin: 2.4rem 0 .8rem; font: 500 1.5rem var(--serif); }
.feature-grid p, .method-copy > p, .about-copy { max-width: 340px; color: var(--muted); font-size: .98rem; line-height: 1.65; }
.audience-statement { display: grid; grid-template-columns: 1fr 2fr; gap: 3rem; max-width: 1240px; margin: 0 auto; padding: 0 2.5rem 6rem; }
.audience-statement p { grid-column: 2; max-width: 760px; margin: 0; padding-top: 1.5rem; border-top: 1px solid var(--line); font: 500 clamp(1.35rem, 2.1vw, 2rem)/1.45 var(--serif); }

.method-section { display: grid; grid-template-columns: 1.1fr 1fr; align-items: center; gap: 7rem; max-width: none; padding: 6.5rem max(2.5rem, calc((100% - 1190px)/2)); background: var(--accent); }
.method-visual { position: relative; height: 280px; border-top: 1px solid rgba(51, 67, 55, .35); border-bottom: 1px solid var(--deep); }
.method-line { position: absolute; top: 50%; right: 5%; left: 5%; transform: rotate(-13deg); border-top: 1px solid var(--deep); }
.method-node { position: absolute; padding: .45rem .7rem; border: 1px solid var(--deep); background: var(--accent); font-size: .78rem; }
.node-a { top: 35%; left: 2%; }
.node-b { top: 58%; left: 45%; }
.node-c { top: 15%; right: 1%; }
.method-copy > p { max-width: 430px; }
.method-copy .text-link { display: inline-block; margin-top: 1rem; }
.about-section { display: grid; grid-template-columns: 1fr 2fr; gap: 3rem; }
.about-copy { max-width: 580px; font-size: 1.2rem; line-height: 1.65; }
.early-access { display: grid; grid-template-columns: 1fr 1fr; gap: 5rem; padding: 5rem max(2.5rem, calc((100% - 1190px)/2)); background: var(--deep); color: var(--white); }
.early-access .eyebrow { color: #c5d2c2; }
.early-access h2 { max-width: 600px; margin: 0; font: 500 clamp(2.6rem, 5vw, 5rem)/1 var(--serif); letter-spacing: -.045em; }
.access-copy { align-self: end; max-width: 340px; color: #e2e8df; }
.access-copy p { margin-top: 0; }
.site-footer { display: flex; align-items: center; justify-content: space-between; max-width: 1240px; margin: auto; padding: 2rem 2.5rem; color: var(--muted); font-size: .8rem; }
.site-footer .brand { color: var(--muted); }

@media (max-width: 1100px) {
  .hero { gap: 2rem; padding-top: 4.75rem; }
  .hero h1 { font-size: clamp(3.45rem, 6.4vw, 4.5rem); }
  .model-diagram { padding-right: 1.15rem; padding-left: 1.15rem; }
  .model-map { gap: 4.4rem 6.8rem; }
  .method-section { gap: 4rem; }
}

@media (max-width: 820px) {
  .hero { grid-template-columns: 1fr; padding-top: 4rem; padding-bottom: 3.75rem; }
  .hero-copy { max-width: 680px; }
  .hero h1 { font-size: clamp(3.6rem, 9vw, 5rem); }
  .hero-visual { min-height: 440px; margin-top: 1rem; }
  .model-diagram { width: min(100%, 560px); }
  .construction-figure { padding: 0 1.25rem; }
  .construction-image-wrap { aspect-ratio: 12 / 5; }
  .section { padding: 5.5rem 2rem; }
  .product-section { padding-top: 4.25rem; }
  .feature-grid { gap: 1.6rem; }
  .method-section { gap: 3rem; padding: 5.5rem 2rem; }
}

@media (max-width: 760px) {
  .site-header { padding: 1.2rem 1.25rem; }
  .site-header nav { gap: .9rem; }
  .site-header nav a:not(.nav-cta) { display: none; }
  .nav-cta { padding: .6rem .85rem; font-size: .78rem !important; }
  .hero { padding: 3.75rem 1.25rem 3.5rem; }
  .hero h1 { font-size: clamp(3rem, 13.5vw, 4.5rem); }
  .hero-lede { font-size: 1.04rem; }
  .hero-actions { flex-direction: column; align-items: flex-start; gap: 1.2rem; }
  .hero-visual { min-height: 440px; margin-top: 1.25rem; }
  .construction-figure { margin-bottom: 0; padding: 0; }
  .construction-image-wrap { aspect-ratio: 7 / 4; }
  .construction-image-wrap img { object-position: 65% 48%; }
  .construction-figure figcaption { margin: .7rem 1.25rem 0; }
  .section { padding: 4.5rem 1.25rem; }
  .product-section { padding-top: 3.4rem; }
  .section-intro, .about-section { display: block; }
  .section-intro h2, .about-section h2 { margin-top: 1.4rem; }
  .feature-grid { grid-template-columns: 1fr; gap: 2.25rem; margin-top: 3.5rem; border-top: 0; }
  .feature-grid article { border-top: 1px solid var(--ink); }
  .feature-grid h3 { margin-top: 1.5rem; }
  .feature-grid p { max-width: 520px; }
  .audience-statement { display: block; padding: 0 1.25rem 4.5rem; }
  .audience-statement p { padding-top: 1.25rem; }
  .method-section { display: block; padding: 4.5rem 1.25rem; }
  .method-visual { margin-bottom: 3.5rem; }
  .early-access { display: block; padding: 4.5rem 1.25rem; }
  .access-copy { margin-top: 2rem; }
  .site-footer { flex-wrap: wrap; gap: 1rem; padding: 1.5rem 1.25rem; }
  .site-footer p { order: 3; width: 100%; margin: 0; }
}

@media (max-width: 600px) {
  .hero-visual { min-height: auto; }
  .model-diagram { width: 100%; padding: 1.25rem; }
  .model-map { display: flex; flex-direction: column; gap: 1rem; min-height: auto; padding: .5rem 0; }
  .model-map::before { position: absolute; top: 5.8rem; bottom: .6rem; left: .75rem; border-left: 1px solid rgba(51, 67, 55, .35); content: ''; }
  .model-connections { display: none; }
  .model-outcome-connector { top: 6.8rem; bottom: -1rem; }
  .model-core { position: relative; top: auto; left: auto; width: 6.3rem; height: 6.3rem; margin: 0 auto .35rem; transform: none; font-size: .94rem; }
  .model-group, .group-built, .group-method, .group-drivers, .group-change { align-self: stretch; margin-left: 2rem; padding: .7rem .8rem .75rem; }
  .model-group::before { position: absolute; top: -.05rem; left: -1.25rem; width: .5rem; height: .5rem; border: 1px solid var(--deep); border-radius: 50%; background: var(--paper); content: ''; }
  .model-group ul { font-size: .86rem; }
  .model-outcome { margin-top: 1rem; }
}

@media (max-width: 430px) {
  .hero h1 { font-size: clamp(2.8rem, 13.2vw, 3.55rem); }
  .model-kicker { font-size: .72rem; }
  .model-support { font-size: .78rem; }
}

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