:root {
  --ink: #101311;
  --ink-soft: #191d1a;
  --paper: #f2f0e9;
  --paper-deep: #e3dfd4;
  --copper: #d17a38;
  --copper-light: #f2ad6d;
  --muted: #a5a99f;
  --line-dark: rgba(255,255,255,.16);
  --line-light: rgba(16,19,17,.16);
  --max: 1240px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--ink); color: var(--paper); font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; line-height: 1.55; }
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
.skip-link { position: fixed; left: 1rem; top: -5rem; z-index: 100; background: var(--paper); color: var(--ink); padding: .75rem 1rem; }
.skip-link:focus { top: 1rem; }

.site-header { position: absolute; z-index: 20; inset: 0 0 auto; min-height: 92px; display: flex; align-items: center; justify-content: space-between; padding: 0 max(4vw, 1.25rem); border-bottom: 1px solid var(--line-dark); }
.brand { display: inline-flex; align-items: center; gap: .75rem; text-decoration: none; font-weight: 800; letter-spacing: .12em; font-size: .96rem; }
.brand sup { color: var(--copper-light); font-size: .55rem; top: -.55em; position: relative; }
.brand-mark { width: 30px; height: 30px; border: 1px solid rgba(255,255,255,.65); display: grid; place-items: center; transform: rotate(45deg); }
.brand-mark i { width: 12px; height: 12px; display: block; background: var(--copper); box-shadow: inset 0 0 0 3px #302218; }
nav { display: flex; align-items: center; gap: 2rem; }
nav a { color: #dcddd8; text-decoration: none; font-size: .88rem; }
nav a:hover, nav a:focus-visible { color: white; }
.nav-cta { border: 1px solid rgba(255,255,255,.55); padding: .65rem 1rem; }
.menu-toggle { display: none; background: none; color: white; border: 1px solid var(--line-dark); padding: .55rem .8rem; font: inherit; }

.hero { min-height: 780px; height: 100svh; max-height: 980px; position: relative; display: grid; align-items: center; overflow: hidden; }
.hero-image { position: absolute; inset: 0; background: url('/assets/carbolith-core-hero.png') center center / cover no-repeat; }
.hero-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(10,12,10,.97) 0%, rgba(10,12,10,.82) 37%, rgba(10,12,10,.10) 72%), linear-gradient(0deg, rgba(10,12,10,.75) 0%, transparent 32%); }
.hero-content { position: relative; z-index: 2; width: min(720px, 78vw); margin-left: max(8vw, 1.25rem); padding-top: 74px; }
.eyebrow { color: var(--copper-light); text-transform: uppercase; font-weight: 750; letter-spacing: .17em; font-size: .73rem; margin: 0 0 1.4rem; }
h1, h2 { font-family: Georgia, "Times New Roman", serif; font-weight: 400; letter-spacing: -.045em; line-height: .98; margin: 0; text-wrap: balance; }
h1 { font-size: clamp(3.2rem, 6.6vw, 7rem); }
h1 em { font-style: normal; color: var(--copper-light); }
.hero-copy { max-width: 640px; color: #d5d5d0; font-size: clamp(1rem, 1.35vw, 1.22rem); margin: 2rem 0 2.4rem; }
.hero-actions { display: flex; align-items: center; gap: 1.5rem; flex-wrap: wrap; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: .7rem; min-height: 52px; padding: .8rem 1.25rem; text-decoration: none; font-weight: 750; font-size: .89rem; }
.button.primary { color: #17120e; background: var(--copper-light); }
.button.primary:hover, .button.primary:focus-visible { background: #ffc38e; }
.button.text { padding-inline: 0; border-bottom: 1px solid rgba(255,255,255,.5); }
.hero-note { position: absolute; z-index: 2; bottom: 4.5rem; right: max(4vw, 1.25rem); display: flex; gap: .9rem; align-items: flex-start; color: #d6d7d1; font-size: .8rem; }
.hero-note span { color: var(--copper-light); border-top: 1px solid var(--copper-light); padding-top: .35rem; }
.hero-note p { margin: 0; padding-top: .35rem; border-top: 1px solid var(--line-dark); min-width: 130px; }

section:not(.hero) { padding: 8rem max(4vw, 1.25rem); }
.band { display: grid; grid-template-columns: 1fr 2fr 2fr; gap: clamp(2rem, 5vw, 6rem); }
.problem { background: var(--paper); color: var(--ink); }
.section-label { font-size: .72rem; text-transform: uppercase; letter-spacing: .16em; font-weight: 800; padding-top: .55rem; }
h2 { font-size: clamp(2.8rem, 5vw, 5.8rem); }
.problem-copy { font-size: 1.08rem; max-width: 580px; }
.problem-copy p:first-child { margin-top: .35rem; }
.problem-copy p:last-child { color: #525850; }

.stakeholders { background: #1a1e1b; }
.stakeholder-heading { max-width: var(--max); }
.audience-strip { max-width: var(--max); margin: 4rem auto 0; display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--line-dark); }
.audience-strip article { min-height: 220px; padding: 1.5rem; border-right: 1px solid var(--line-dark); border-bottom: 1px solid var(--line-dark); display: flex; flex-direction: column; }
.audience-strip article:nth-child(3n) { border-right: 0; }
.audience-strip article:nth-last-child(-n+3) { border-bottom: 0; }
.audience-strip article > span { color: var(--copper-light); font-size: .7rem; }
.audience-strip strong { font-family: Georgia, "Times New Roman", serif; font-size: 1.45rem; font-weight: 400; line-height: 1.1; margin: 2.7rem 0 .7rem; }
.audience-strip p { color: #afb3ab; font-size: .88rem; margin: 0; }
.audience-strip small { color: var(--copper-light); margin-top: auto; padding-top: 1.2rem; text-transform: uppercase; letter-spacing: .08em; font-size: .62rem; }
.value-tabs { max-width: var(--max); margin: 5rem auto 0; display: grid; grid-template-columns: .58fr 1.42fr; gap: 4rem; }
.tabs-intro h3 { font-family: Georgia, "Times New Roman", serif; font-size: clamp(2.2rem, 3.5vw, 4rem); font-weight: 400; line-height: 1; margin: 0 0 1.5rem; }
.tabs-intro > p:last-child { color: #aeb2aa; max-width: 300px; }
.tabs-shell { border-top: 1px solid var(--line-dark); }
.tab-list { display: flex; flex-wrap: wrap; gap: .5rem; padding: 1.2rem 0; border-bottom: 1px solid var(--line-dark); }
.tab-list button { border: 1px solid #50564f; color: #c6c9c2; background: transparent; padding: .55rem .85rem; font: 700 .76rem/1.2 Inter, ui-sans-serif, system-ui, sans-serif; cursor: pointer; }
.tab-list button[aria-selected="true"] { background: var(--copper-light); border-color: var(--copper-light); color: #17120e; }
.tab-list button:focus-visible { outline: 2px solid white; outline-offset: 3px; }
.tab-panels article { padding: 2.5rem 0 1rem; }
.panel-kicker { color: var(--copper-light); font-size: .73rem; text-transform: uppercase; letter-spacing: .09em; font-weight: 800; }
.tab-panels h3 { font-family: Georgia, "Times New Roman", serif; font-weight: 400; font-size: clamp(1.85rem, 3vw, 3.2rem); line-height: 1.05; max-width: 720px; margin: .5rem 0 2rem; }
.tab-panels ul { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 0 2rem; }
.tab-panels li { position: relative; border-top: 1px solid var(--line-dark); padding: 1rem 0 1rem 1.2rem; color: #c1c4bd; font-size: .9rem; }
.tab-panels li::before { content: ''; position: absolute; left: 0; top: 1.55rem; width: 5px; height: 5px; background: var(--copper); }

.platform { background: var(--ink); max-width: var(--max); margin: 0 auto; }
.section-intro { display: grid; grid-template-columns: 1fr 2.1fr; column-gap: 4rem; }
.section-intro .eyebrow { grid-row: span 2; padding-top: .6rem; }
.section-intro > p:last-child { max-width: 650px; color: #b8bbb4; font-size: 1.08rem; margin: 2rem 0 0; }
.architecture-card { margin-top: 5rem; background: var(--ink-soft); border: 1px solid var(--line-dark); display: grid; grid-template-columns: 1.15fr 1fr; min-height: 520px; overflow: hidden; }
.arch-visual { min-height: 520px; position: relative; display: grid; place-items: center; perspective: 900px; background: radial-gradient(circle at 45% 45%, #3e3125, #1a1d1a 57%, #111411 75%); }
.core { width: 45%; aspect-ratio: 1; position: absolute; background: radial-gradient(circle at 30% 25%, #71502e 0 2%, transparent 3%), radial-gradient(circle at 70% 68%, #9b6330 0 1.5%, transparent 2.5%), radial-gradient(circle, #362719 0 5%, #17120e 6% 19%, #291d13 20%); background-size: 39px 43px, 31px 29px, 54px 47px; transform: rotateX(58deg) rotateZ(-42deg); box-shadow: 0 0 70px rgba(209,122,56,.18); }
.core span { position: absolute; width: 30%; height: 2px; background: #a87443; transform: rotate(var(--r, 23deg)); opacity: .7; }
.core span:nth-child(1){left:12%;top:20%;--r:18deg}.core span:nth-child(2){left:51%;top:35%;--r:-31deg}.core span:nth-child(3){left:22%;top:66%;--r:61deg}.core span:nth-child(4){left:58%;top:76%;--r:8deg}.core span:nth-child(5){left:35%;top:48%;--r:-67deg}
.shell { width: 58%; aspect-ratio: 1; position: absolute; border: 18px solid #77786f; transform: rotateX(58deg) rotateZ(-42deg); }
.shell-back { opacity: .32; translate: 0 -44px; }
.shell-front { border-color: #a6a69c; border-right-color: #5d5f58; border-bottom-color: #4a4e48; translate: 0 36px; clip-path: polygon(0 0, 100% 0, 100% 100%, 67% 100%, 67% 67%, 33% 67%, 33% 100%, 0 100%); }
.arch-legend { padding: 3.5rem; display: grid; align-content: center; }
.arch-legend > div { padding: 1.5rem 0; border-top: 1px solid var(--line-dark); display: grid; grid-template-columns: 50px 1fr; column-gap: 1rem; }
.arch-legend span { color: var(--copper-light); font-size: .72rem; }
.arch-legend h3 { margin: 0; font-size: 1.05rem; }
.arch-legend p { grid-column: 2; margin: .35rem 0 0; color: #aeb2aa; font-size: .9rem; }
.process { list-style: none; padding: 0; margin: 5rem 0 0; display: grid; grid-template-columns: repeat(5, 1fr); border-top: 1px solid var(--line-dark); }
.process li { position: relative; padding: 1.25rem 1rem 0 0; }
.process li:not(:last-child)::after { content: ''; position: absolute; top: -4px; right: 1.25rem; width: 7px; height: 7px; border-right: 1px solid var(--muted); border-top: 1px solid var(--muted); transform: rotate(45deg); }
.process span { color: var(--copper-light); font-size: .68rem; display: block; margin-bottom: .9rem; }
.process strong, .process small { display: block; }
.process strong { font-size: 1rem; }
.process small { color: var(--muted); margin-top: .3rem; }

.materials { background: #23231f; display: grid; grid-template-columns: .72fr 1.28fr; column-gap: 6rem; }
.materials-intro { grid-row: span 2; }
.materials-intro h2 { font-size: clamp(2.8rem, 4.5vw, 5.3rem); }
.materials-intro > p:last-child { color: #b6b8b1; max-width: 650px; margin-top: 2rem; }
.material-groups { display: grid; gap: 1rem; }
.material-groups article { border: 1px solid var(--line-dark); padding: 1.7rem; }
.material-groups article > span { color: var(--copper-light); text-transform: uppercase; letter-spacing: .1em; font-size: .65rem; font-weight: 800; }
.material-groups h3 { font-family: Georgia, "Times New Roman", serif; font-size: 1.6rem; font-weight: 400; margin: .7rem 0 1rem; }
.material-groups ul { margin: 0; padding-left: 1.2rem; color: #bfc2ba; font-size: .9rem; }
.material-groups li + li { margin-top: .45rem; }
.confidential-note { grid-column: 2; border-left: 3px solid var(--copper); padding: 1rem 1.2rem; color: #bfc2ba; background: #1a1c19; }
.confidential-note strong { color: white; }

.applications { background: var(--paper); color: var(--ink); }
.section-heading { max-width: var(--max); margin: 0 auto 4rem; display: grid; grid-template-columns: 1.45fr .55fr; gap: 5rem; align-items: end; }
.section-heading h2 { max-width: 840px; }
.section-heading > p { color: #555b54; font-size: 1.02rem; }
.application-grid { max-width: var(--max); margin: 0 auto; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line-light); border-bottom: 1px solid var(--line-light); }
.application-grid article { min-height: 390px; padding: 1.5rem; border-left: 1px solid var(--line-light); display: flex; flex-direction: column; }
.application-grid article:last-child { border-right: 1px solid var(--line-light); }
.application-grid article > span { font-size: .7rem; color: #747a72; }
.application-grid h3 { font-family: Georgia, "Times New Roman", serif; font-size: 1.65rem; font-weight: 400; line-height: 1.05; margin: auto 0 1rem; }
.application-grid p { color: #555b54; font-size: .9rem; }
.application-grid small { color: #7a4a25; text-transform: uppercase; letter-spacing: .1em; font-weight: 800; font-size: .64rem; margin-top: 1rem; }
.icon { width: 100%; height: 110px; position: relative; margin: 2.5rem 0 0; border-bottom: 1px solid #8f928b; }
.icon::before, .icon::after { content: ''; position: absolute; }
.icon.landscape::before { inset: 45px 5% 0; border: 1px solid #676d65; transform: skewX(-22deg); }
.icon.landscape::after { width: 34%; height: 34%; left: 34%; bottom: 0; background: var(--copper); opacity: .65; transform: skewX(-22deg); }
.icon.drainage::before { width: 74px; height: 74px; border: 1px solid #676d65; border-radius: 50%; left: calc(50% - 37px); bottom: 0; }
.icon.drainage::after { width: 22px; height: 66px; left: calc(50% - 11px); bottom: 0; background: var(--copper); opacity: .65; }
.icon.barrier::before { width: 72%; height: 68px; left: 14%; bottom: 0; border: 1px solid #676d65; background: repeating-linear-gradient(90deg, transparent 0 24%, #8e918a 25% 26%); }
.icon.barrier::after { height: 6px; width: 52%; bottom: 31px; left: 24%; background: var(--copper); opacity: .7; }
.icon.carbon::before { width: 70px; height: 70px; left: calc(50% - 35px); bottom: 0; border: 9px solid #777c74; box-shadow: inset 0 0 0 20px #2a211a; transform: rotate(45deg); }

.impact { background: #111411; max-width: var(--max); margin: 0 auto; }
.impact-head { display: grid; grid-template-columns: 1.25fr .75fr; gap: 6rem; align-items: end; }
.impact-head > p { color: #b7bab3; font-size: 1.02rem; }
.impact-grid { margin-top: 4rem; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line-dark); border-left: 1px solid var(--line-dark); }
.impact-grid article { min-height: 240px; padding: 1.5rem; border-right: 1px solid var(--line-dark); border-bottom: 1px solid var(--line-dark); }
.impact-grid article > span { color: var(--copper-light); font-size: .7rem; }
.impact-grid h3 { font-family: Georgia, "Times New Roman", serif; font-size: 1.55rem; font-weight: 400; margin: 3rem 0 .8rem; }
.impact-grid p { color: #adb1a9; font-size: .88rem; }
.scale-map { margin-top: 5rem; display: grid; grid-template-columns: 1.1fr repeat(3, 1fr); border-top: 1px solid var(--line-dark); border-bottom: 1px solid var(--line-dark); }
.scale-map > * { padding: 2rem; border-right: 1px solid var(--line-dark); }
.scale-map > *:last-child { border-right: 0; }
.scale-title h3 { font-family: Georgia, "Times New Roman", serif; font-size: 2rem; font-weight: 400; line-height: 1.05; margin: 0; }
.scale-map article span { color: var(--copper-light); font-weight: 800; font-size: .75rem; text-transform: uppercase; letter-spacing: .1em; }
.scale-map article p { color: #b4b7b0; font-size: .88rem; margin-top: 2.5rem; }
.sdg-row { margin-top: 2rem; display: flex; align-items: stretch; border: 1px solid var(--line-dark); overflow-x: auto; }
.sdg-row > p { min-width: 210px; margin: 0; padding: 1rem; }
.sdg-row > p strong, .sdg-row > p span { display: block; }
.sdg-row > p span { color: #999e96; font-size: .72rem; }
.sdg-row > div { min-width: 115px; padding: .85rem; border-left: 1px solid var(--line-dark); font-size: .68rem; color: #aeb2aa; }
.sdg-row > div span { width: 34px; height: 34px; display: grid; place-items: center; margin-bottom: .7rem; background: var(--copper); color: #17120e; font-weight: 900; font-size: .85rem; }

.farmers { background: #363522; display: grid; grid-template-columns: .7fr 1.3fr; gap: 6rem; }
.farmer-lead { position: sticky; top: 2rem; align-self: start; }
.farmer-lead h2 { font-size: clamp(2.8rem, 4.5vw, 5.2rem); }
.farmer-lead > p:last-child { color: #d3d1c5; margin-top: 2rem; }
.farmer-model ol { list-style: none; margin: 0; padding: 0; }
.farmer-model li { display: grid; grid-template-columns: 55px 1fr; border-top: 1px solid rgba(255,255,255,.19); padding: 1.35rem 0; }
.farmer-model li > span { color: var(--copper-light); font-size: .7rem; }
.farmer-model strong { font-size: 1.05rem; }
.farmer-model li p { color: #d1d0c4; margin: .35rem 0 0; font-size: .9rem; }
.farmer-model aside { margin-top: 2rem; background: #1b1e1a; padding: 2rem; border-left: 3px solid var(--copper-light); }
.farmer-model aside h3 { font-family: Georgia, "Times New Roman", serif; font-weight: 400; font-size: 2rem; line-height: 1.1; margin: 0 0 1rem; }
.farmer-model aside > p:last-child { color: #b8bbb4; }

.regional { background: #c97535; color: #17120e; }
.regional-points p { display: grid; grid-template-columns: 1fr 1.5fr; gap: 1rem; border-top: 1px solid rgba(23,18,14,.3); padding: 1rem 0; margin: 0; }
.regional-points p:last-child { border-bottom: 1px solid rgba(23,18,14,.3); }
.regional-points span { font-size: .9rem; }

.why { background: var(--paper-deep); color: var(--ink); }
.why-head { max-width: var(--max); margin: 0 auto; display: grid; grid-template-columns: .4fr 1.6fr; gap: 4rem; }
.why-head .eyebrow { color: #8b4c20; padding-top: .65rem; }
.why-head h2 { max-width: 1050px; }
.why-grid { max-width: var(--max); margin: 5rem auto 0; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line-light); border-bottom: 1px solid var(--line-light); }
.why-grid article { min-height: 300px; padding: 1.5rem; border-left: 1px solid var(--line-light); }
.why-grid article:last-child { border-right: 1px solid var(--line-light); }
.why-grid article > span { color: #8b4c20; font-size: .7rem; }
.why-grid h3 { font-family: Georgia, "Times New Roman", serif; font-size: 1.45rem; font-weight: 400; line-height: 1.1; margin: 3.2rem 0 1rem; }
.why-grid p { color: #555b54; font-size: .88rem; }
.difference-table-wrap { max-width: var(--max); margin: 6rem auto 0; display: grid; grid-template-columns: .58fr 1.42fr; gap: 4rem; }
.difference-intro h3 { font-family: Georgia, "Times New Roman", serif; font-size: 2.25rem; font-weight: 400; line-height: 1.05; margin: 0 0 1.5rem; }
.difference-intro > p:last-child { color: #555b54; }
.difference-row { display: grid; grid-template-columns: 1fr 1fr 1.35fr; border-top: 1px solid var(--line-light); }
.difference-row:last-child { border-bottom: 1px solid var(--line-light); }
.difference-row > * { padding: 1rem; border-left: 1px solid var(--line-light); font-size: .82rem; }
.difference-row > *:last-child { border-right: 1px solid var(--line-light); }
.difference-row strong { font-size: .88rem; }
.difference-row.header > * { color: #6a7068; text-transform: uppercase; letter-spacing: .08em; font-size: .64rem; font-weight: 800; }
.difference-row.emphasis { background: #1b1e1a; color: white; }
.difference-row.emphasis > * { border-color: #42463f; }

.validation { max-width: var(--max); margin: 0 auto; }
.validation-head { display: grid; grid-template-columns: 1.3fr .7fr; gap: 6rem; align-items: end; }
.validation-head > p { color: #b7bab3; }
.status-grid { margin-top: 4rem; display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line-dark); }
.status-grid article { min-height: 270px; padding: 1.5rem; border-right: 1px solid var(--line-dark); }
.status-grid article:last-child { border-right: 0; }
.status-grid span { display: inline-block; color: #aeb1aa; border: 1px solid #51564f; border-radius: 99px; padding: .25rem .55rem; font-size: .65rem; text-transform: uppercase; letter-spacing: .07em; }
.status-grid .completed span, .status-grid .active span { color: var(--copper-light); border-color: #754a2d; }
.status-grid h3 { font-family: Georgia, "Times New Roman", serif; font-size: 1.45rem; font-weight: 400; margin: 4rem 0 1rem; }
.status-grid p { color: #aeb1aa; font-size: .88rem; }
.claim-note { margin-top: 1.5rem; padding: 1.2rem 1.5rem; border-left: 3px solid var(--copper); background: #171a17; display: grid; grid-template-columns: .5fr 1.5fr; gap: 2rem; }
.claim-note p { margin: 0; color: #b8bbb4; }

.partner { background: var(--paper); color: var(--ink); display: grid; grid-template-columns: 1.3fr .7fr; gap: 8rem; align-items: end; }
.partner h2 { max-width: 830px; }
.partner-copy > p:not(.eyebrow) { max-width: 650px; color: #555b54; font-size: 1.06rem; margin: 2rem 0; }
.partner .button.primary { background: var(--ink); color: var(--paper); }
.partner .button.primary:hover { background: #323730; }
.partner-list > div { border-top: 1px solid var(--line-light); padding: 1.25rem 0; display: grid; grid-template-columns: 40px 1fr; gap: .5rem; }
.partner-list > div:last-child { border-bottom: 1px solid var(--line-light); }
.partner-list span { color: #895129; font-size: .7rem; }
.partner-list p { margin: 0; font-size: .9rem; }
.partner-list strong { display: block; font-size: 1rem; }

footer { max-width: var(--max); margin: 0 auto; min-height: 300px; padding: 4rem max(4vw, 1.25rem) 2rem; display: grid; grid-template-columns: 1.2fr 1fr 1fr auto; gap: 3rem; align-items: start; color: #adb0a9; }
.footer-brand { color: white; }
footer p { margin: 0; font-size: .85rem; }
footer a { font-size: .85rem; text-underline-offset: 4px; }
footer small { grid-column: 1 / -1; border-top: 1px solid var(--line-dark); padding-top: 1rem; }

@media (max-width: 900px) {
  .site-header { min-height: 74px; }
  .menu-toggle { display: block; }
  nav { display: none; position: absolute; top: 74px; left: 0; right: 0; background: rgba(16,19,17,.98); padding: 1.25rem; flex-direction: column; align-items: stretch; gap: .4rem; border-bottom: 1px solid var(--line-dark); }
  nav.open { display: flex; }
  nav a { padding: .75rem; }
  .hero { min-height: 720px; }
  .hero-content { width: auto; margin-right: 1.25rem; }
  .hero-image { background-position: 63% center; }
  .hero-shade { background: linear-gradient(90deg, rgba(10,12,10,.96), rgba(10,12,10,.68) 70%, rgba(10,12,10,.3)), linear-gradient(0deg, rgba(10,12,10,.9), transparent 45%); }
  .hero-note { display: none; }
  .band, .section-intro, .section-heading, .validation-head, .partner, .materials, .impact-head, .farmers, .why-head, .difference-table-wrap { grid-template-columns: 1fr; }
  .section-intro .eyebrow { grid-row: auto; }
  .audience-strip { grid-template-columns: repeat(2, 1fr); }
  .audience-strip article, .audience-strip article:nth-child(3n) { border-right: 1px solid var(--line-dark); border-bottom: 1px solid var(--line-dark); }
  .audience-strip article:nth-child(2n) { border-right: 0; }
  .audience-strip article:nth-last-child(-n+2) { border-bottom: 0; }
  .value-tabs { grid-template-columns: 1fr; }
  .architecture-card { grid-template-columns: 1fr; }
  .materials-intro { grid-row: auto; }
  .confidential-note { grid-column: 1; }
  .application-grid, .status-grid { grid-template-columns: repeat(2, 1fr); }
  .impact-grid { grid-template-columns: repeat(2, 1fr); }
  .scale-map { grid-template-columns: 1fr 1fr; }
  .scale-map > * { border-bottom: 1px solid var(--line-dark); }
  .farmer-lead { position: static; }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid article:nth-child(3), .why-grid article:nth-child(4) { border-top: 1px solid var(--line-light); }
  .application-grid article:nth-child(3), .application-grid article:nth-child(4), .status-grid article:nth-child(3), .status-grid article:nth-child(4) { border-top: 1px solid var(--line-light); }
  .status-grid article { border-bottom: 1px solid var(--line-dark); }
  .process { grid-template-columns: repeat(3, 1fr); row-gap: 2rem; }
  footer { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 580px) {
  section:not(.hero) { padding-block: 5.5rem; }
  h1 { font-size: clamp(2.75rem, 13vw, 4.2rem); }
  h2 { font-size: clamp(2.45rem, 11vw, 4rem); }
  .hero { min-height: 760px; }
  .hero-content { padding-top: 55px; }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .button.text { align-self: flex-start; }
  .architecture-card { margin-top: 3rem; }
  .audience-strip { grid-template-columns: 1fr; }
  .audience-strip article, .audience-strip article:nth-child(2n), .audience-strip article:nth-last-child(-n+2) { min-height: 205px; border-right: 0; border-bottom: 1px solid var(--line-dark); }
  .audience-strip article:last-child { border-bottom: 0; }
  .tab-list { flex-wrap: nowrap; overflow-x: auto; padding-bottom: 1rem; }
  .tab-list button { flex: 0 0 auto; }
  .tab-panels ul { grid-template-columns: 1fr; }
  .arch-visual { min-height: 350px; }
  .arch-legend { padding: 1.5rem; }
  .process { grid-template-columns: 1fr 1fr; }
  .application-grid, .status-grid, .impact-grid, .why-grid { grid-template-columns: 1fr; }
  .scale-map { grid-template-columns: 1fr; }
  .scale-map > * { border-right: 0; }
  .difference-table { overflow-x: auto; }
  .difference-row { min-width: 660px; }
  .application-grid article { min-height: 340px; border-right: 1px solid var(--line-light); border-bottom: 1px solid var(--line-light); }
  .status-grid article { min-height: 230px; border-right: 0; }
  .status-grid h3 { margin-top: 2.5rem; }
  .claim-note { grid-template-columns: 1fr; gap: .5rem; }
  .regional-points p { grid-template-columns: 1fr; }
  footer { grid-template-columns: 1fr; }
  .footer-note { display: none; }
}

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