:root {
  --ink: #0b1725;
  --navy: #071729;
  --blue: #0c315a;
  --blue-bright: #195d98;
  --steel: #9db1c3;
  --mist: #edf1f3;
  --paper: #f7f5ef;
  --white: #fff;
  --red: #e3422e;
  --molten: #ffb000;
  --line: rgba(11, 23, 37, .18);
  --max: 1440px;
  --gutter: clamp(22px, 5vw, 78px);
  --section-pad: clamp(90px, 11vw, 168px);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Segoe UI", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; }
a { color: inherit; }
button, input, textarea { font: inherit; }
::selection { background: var(--molten); color: var(--navy); }

.skip-link {
  position: fixed;
  left: 12px;
  top: -60px;
  z-index: 1000;
  padding: 12px 18px;
  background: #fff;
  color: #000;
  transition: top .2s ease;
}
.skip-link:focus { top: 12px; }

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: 78px;
  padding: 0 var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--white);
  border-bottom: 1px solid rgba(255,255,255,.24);
  transition: background .3s ease, height .3s ease, color .3s ease;
}
.site-header.is-scrolled {
  height: 66px;
  background: rgba(7,23,41,.95);
  backdrop-filter: blur(16px);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  letter-spacing: .08em;
  font-size: 14px;
  font-weight: 700;
}
.brand b { color: var(--molten); }
.brand-mark {
  width: 23px;
  height: 25px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3px;
  transform: skewY(-9deg);
}
.brand-mark i { display: block; background: currentColor; }
.brand-mark i:last-child { margin-top: 8px; background: var(--red); }
.site-nav { display: flex; align-items: center; gap: 30px; }
.site-nav > a {
  position: relative;
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .02em;
}
.site-nav > a:not(.nav-cta)::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -7px;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform .25s ease;
}
.site-nav > a:hover::after { transform: scaleX(1); transform-origin: left; }
.nav-cta { border: 1px solid rgba(255,255,255,.58); padding: 11px 17px; }
.nav-cta:hover { background: var(--white); color: var(--navy); }
.menu-button { display: none; }

.hero {
  position: relative;
  min-height: 100svh;
  color: var(--white);
  display: grid;
  align-items: end;
  overflow: hidden;
}
.hero-image, .hero-shade { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-image { object-fit: cover; object-position: center 48%; transform: scale(1.025); animation: hero-in 1.6s cubic-bezier(.2,.7,.2,1) both; }
.hero-shade {
  background:
    linear-gradient(90deg, rgba(4,15,29,.92) 0%, rgba(4,15,29,.62) 45%, rgba(4,15,29,.12) 77%),
    linear-gradient(0deg, rgba(4,15,29,.66) 0%, transparent 45%);
}
.hero-content {
  position: relative;
  z-index: 2;
  width: min(910px, 85vw);
  padding: 150px var(--gutter) 150px;
}
.eyebrow {
  margin: 0 0 22px;
  text-transform: uppercase;
  letter-spacing: .19em;
  font-size: 12px;
  font-weight: 800;
  color: var(--red);
}
.hero-kicker { color: #ffcc69; animation: text-rise .7s .25s both; }
h1, h2, h3, p { overflow-wrap: anywhere; }
h1, h2 {
  margin: 0;
  font-family: "Arial Narrow", "Segoe UI", Arial, sans-serif;
  letter-spacing: -.045em;
  font-weight: 750;
}
h1 {
  font-size: clamp(52px, 7.3vw, 116px);
  line-height: .91;
  max-width: 1070px;
  animation: text-rise .85s .38s both;
}
h1 span { color: #d7e1e7; }
.hero-copy {
  width: min(660px, 100%);
  margin: 32px 0 0;
  color: rgba(255,255,255,.8);
  font-size: clamp(17px, 1.55vw, 22px);
  line-height: 1.55;
  animation: text-rise .75s .55s both;
}
.hero-actions { display: flex; align-items: center; gap: 30px; margin-top: 36px; animation: text-rise .75s .68s both; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 24px;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: .08em;
  font-size: 12px;
  font-weight: 800;
  transition: transform .2s ease, background .2s ease, color .2s ease;
}
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--red); color: var(--white); }
.button-primary:hover { background: #ff5b44; }
.button-dark { background: var(--navy); color: var(--white); }
.text-link {
  text-decoration: none;
  font-size: 14px;
  font-weight: 700;
  padding-bottom: 5px;
  border-bottom: 1px solid currentColor;
}
.text-link span { display: inline-block; transition: transform .2s ease; }
.text-link:hover span { transform: translate(3px, -3px); }
.hero-foot {
  position: absolute;
  z-index: 2;
  right: var(--gutter);
  bottom: 33px;
  display: flex;
  gap: 22px;
  color: rgba(255,255,255,.65);
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: 10px;
}
.hero-foot span + span::before { content: "/"; margin-right: 22px; color: var(--red); }

@keyframes hero-in { from { opacity: .3; transform: scale(1.11); } to { opacity: 1; transform: scale(1.025); } }
@keyframes text-rise { from { opacity: 0; transform: translateY(28px); } to { opacity: 1; transform: translateY(0); } }

.section-dark { background: var(--navy); color: var(--white); }
.section-blue { background: var(--blue); color: var(--white); }
.section-light { background: #e6ecef; }
.section-number {
  font-family: Georgia, serif;
  font-size: clamp(70px, 10vw, 150px);
  line-height: .8;
  color: rgba(255,255,255,.08);
  letter-spacing: -.08em;
}
.section-light .section-number { color: rgba(7,23,41,.09); }
.constraint {
  position: relative;
  display: grid;
  grid-template-columns: .55fr 1.45fr 1fr;
  gap: clamp(28px, 6vw, 95px);
  padding: var(--section-pad) var(--gutter);
}
.constraint h2, .section-heading h2, .difference h2, .company h2, .assessment h2, .evidence h2 {
  font-size: clamp(44px, 5.8vw, 86px);
  line-height: .98;
}
.constraint-detail { padding-top: 55px; max-width: 490px; }
.constraint-detail p { margin: 0 0 28px; color: rgba(255,255,255,.68); line-height: 1.75; font-size: 16px; }
.ore-spectrum { grid-column: 2 / 4; margin-top: 40px; border-top: 1px solid rgba(255,255,255,.2); padding-top: 28px; }
.spectrum-scale, .spectrum-labels { display: flex; justify-content: space-between; gap: 20px; }
.spectrum-scale { color: rgba(255,255,255,.45); font-size: 10px; letter-spacing: .1em; text-transform: uppercase; }
.spectrum-bar { height: 8px; margin: 12px 0 14px; background: linear-gradient(90deg, #dce7ee, #4da2d1 50%, #d5613b 100%); position: relative; }
.spectrum-bar::after { content: ""; position: absolute; width: 2px; height: 22px; background: #fff; top: -7px; left: 45%; }
.spectrum-labels { font-size: 13px; font-weight: 700; }
.ore-spectrum > p { max-width: 690px; margin: 34px 0 0; color: rgba(255,255,255,.62); line-height: 1.6; }

.process { padding: var(--section-pad) var(--gutter); background: var(--paper); }
.section-heading { max-width: 820px; }
.section-heading > p:last-child { margin: 24px 0 0; max-width: 580px; color: #5c6872; font-size: 18px; line-height: 1.6; }
.process-rail { margin-top: clamp(70px, 8vw, 120px); border-top: 1px solid var(--line); }
.process-step {
  display: grid;
  grid-template-columns: .35fr 1.1fr .8fr;
  min-height: 280px;
  align-items: center;
  border-bottom: 1px solid var(--line);
  transition: background .3s ease;
}
.process-step:hover { background: #fff; }
.step-index { color: var(--red); font-size: 13px; font-weight: 800; letter-spacing: .15em; }
.step-copy { padding: 55px 40px 55px 0; }
.step-copy h3 { margin: 0 0 16px; font-size: clamp(26px, 3vw, 42px); letter-spacing: -.03em; }
.step-copy p { max-width: 640px; margin: 0; color: #64707a; line-height: 1.7; }
.step-visual { position: relative; height: 200px; min-width: 240px; overflow: hidden; }
.pellet-visual { display: flex; align-items: center; justify-content: center; gap: 9px; }
.pellet-visual span { width: 46px; aspect-ratio: 1; border-radius: 50%; background: radial-gradient(circle at 32% 27%, #765f51, #211c1a 72%); box-shadow: 0 10px 25px rgba(0,0,0,.24); }
.pellet-visual span:nth-child(2), .pellet-visual span:nth-child(4) { transform: translateY(34px); }
.ring-visual { display: grid; place-items: center; }
.ring-track, .ring-hot, .ring-core { position: absolute; border-radius: 50%; }
.ring-track { width: 185px; height: 185px; border: 25px solid #d8dde0; box-shadow: inset 0 0 0 1px #bbc4ca; }
.ring-hot { width: 185px; height: 185px; border: 25px solid transparent; border-top-color: var(--red); border-right-color: var(--molten); transform: rotate(-42deg); }
.ring-core { width: 75px; height: 75px; background: var(--navy); }
.transfer-visual { display: flex; align-items: center; justify-content: center; }
.transfer-line { width: 180px; height: 4px; background: linear-gradient(90deg, var(--red), var(--molten)); }
.transfer-orb { position: absolute; width: 32px; height: 32px; left: calc(50% - 105px); border-radius: 50%; background: var(--molten); box-shadow: 0 0 25px rgba(255,176,0,.6); animation: transfer 3.2s ease-in-out infinite; }
.transfer-arrow { font-size: 34px; color: var(--red); margin-left: 14px; }
@keyframes transfer { 50% { transform: translateX(168px); } }
.furnace-visual { display: flex; justify-content: center; align-items: flex-start; padding-top: 22px; }
.electrode { width: 18px; height: 100px; background: #202a31; margin: 0 13px; border-radius: 4px 4px 0 0; z-index: 2; }
.e2 { height: 120px; }
.bath { position: absolute; bottom: 18px; width: 210px; height: 78px; border-radius: 8px 8px 80px 80px; background: linear-gradient(#f04b2f 0 30%, #ffb000 31% 55%, #20262b 56%); box-shadow: 0 12px 30px rgba(227,66,46,.28); }
.metal-visual { display: grid; place-items: center; }
.ladle { position: absolute; width: 120px; height: 92px; border-radius: 7px 7px 55px 55px; border: 14px solid #26313a; transform: rotate(-10deg); }
.pour { width: 18px; height: 110px; background: linear-gradient(var(--molten), var(--red)); transform: translate(74px, 50px) rotate(-22deg); box-shadow: 0 0 18px rgba(255,176,0,.55); }

.difference { position: relative; padding: var(--section-pad) var(--gutter); }
.difference-intro { max-width: 930px; margin: 0 auto 90px; }
.difference .section-number { position: absolute; right: var(--gutter); top: var(--section-pad); }
.principles { display: grid; grid-template-columns: repeat(2, 1fr); max-width: 1180px; margin: 0 auto; border-top: 1px solid rgba(255,255,255,.2); border-left: 1px solid rgba(255,255,255,.2); }
.principle { min-height: 270px; padding: 45px; border-right: 1px solid rgba(255,255,255,.2); border-bottom: 1px solid rgba(255,255,255,.2); }
.principle-line { display: block; width: 44px; height: 3px; margin-bottom: 38px; background: var(--molten); }
.principle h3 { margin: 0 0 18px; font-size: 27px; }
.principle p { margin: 0; max-width: 470px; color: rgba(255,255,255,.67); line-height: 1.7; }

.comparison { padding: var(--section-pad) var(--gutter); }
.comparison-table { margin-top: 70px; border-top: 2px solid var(--ink); }
.comparison-row { display: grid; grid-template-columns: 1.05fr 1.3fr 1.2fr 1.05fr; border-bottom: 1px solid var(--line); }
.comparison-row > div { padding: 26px 22px 26px 0; line-height: 1.5; }
.comparison-row strong { display: block; font-size: 19px; }
.comparison-row small { display: block; margin-top: 4px; color: #72808b; }
.comparison-head { text-transform: uppercase; letter-spacing: .09em; font-size: 10px; font-weight: 800; }
.comparison-highlight { background: var(--navy); color: #fff; margin: 0 calc(var(--gutter) * -.35); padding: 0 calc(var(--gutter) * .35); border: 0; }
.comparison-highlight small { color: rgba(255,255,255,.55); }
.source-note { margin: 28px 0 0 auto; max-width: 790px; color: #6e7780; line-height: 1.6; font-size: 13px; }

.evidence { display: grid; grid-template-columns: 1.2fr 1fr; min-height: 720px; background: #dfe7eb; }
.evidence > img { width: 100%; height: 100%; object-fit: cover; }
.evidence-copy { align-self: center; padding: 80px var(--gutter); }
.evidence-copy > p:not(.eyebrow) { color: #56646f; line-height: 1.7; max-width: 600px; }
.evidence-copy dl { margin: 46px 0 0; }
.evidence-copy dl div { display: grid; grid-template-columns: 110px 1fr; padding: 17px 0; border-top: 1px solid rgba(7,23,41,.2); }
.evidence-copy dt { font-size: 12px; font-weight: 800; text-transform: uppercase; letter-spacing: .08em; }
.evidence-copy dd { margin: 0; color: #55636d; }

.studies { position: relative; padding: var(--section-pad) var(--gutter); }
.studies .section-number { position: absolute; right: var(--gutter); top: var(--section-pad); }
.study-list { margin-top: 80px; border-top: 2px solid var(--ink); }
.study { display: grid; grid-template-columns: .35fr .9fr 1.3fr; gap: 40px; padding: 55px 0; border-bottom: 1px solid rgba(7,23,41,.2); }
.study-label { color: var(--red); font-weight: 800; letter-spacing: .12em; font-size: 12px; text-transform: uppercase; }
.study-title h3 { margin: 0 0 13px; font-size: 28px; letter-spacing: -.025em; }
.study-title p { margin: 0; max-width: 460px; color: #62717b; line-height: 1.65; }
.study-metrics { display: grid; grid-template-columns: repeat(2, 1fr); margin: 0; gap: 26px 40px; }
.study-metrics div { border-top: 1px solid rgba(7,23,41,.18); padding-top: 12px; }
.study-metrics dt { text-transform: uppercase; letter-spacing: .09em; font-size: 10px; color: #6e7d87; font-weight: 800; }
.study-metrics dd { margin: 8px 0 0; font-size: 19px; font-weight: 700; }
.study-metrics .metric-cost { border-top-color: var(--red); }
.study-metrics .metric-cost dt { color: var(--red); }
.study-metrics .metric-cost dd { color: var(--red); font-size: 22px; }
.study-disclaimer { display: grid; grid-template-columns: .55fr 1.45fr; gap: 40px; margin-top: 55px; padding: 28px 0; border-top: 1px solid var(--ink); border-bottom: 1px solid var(--ink); }
.study-disclaimer span { font-weight: 800; }
.study-disclaimer p { margin: 0; color: #5f6c75; line-height: 1.65; }

.assessment { padding: var(--section-pad) var(--gutter); background: var(--molten); display: grid; grid-template-columns: 1.1fr .8fr; gap: 80px; align-items: end; }
.assessment-copy > p:last-child { max-width: 650px; line-height: 1.7; }
.assessment .eyebrow { color: var(--navy); }
.assessment-fields { display: flex; flex-wrap: wrap; gap: 8px; align-self: center; }
.assessment-fields span { padding: 10px 13px; border: 1px solid rgba(7,23,41,.35); font-size: 12px; font-weight: 700; }
.assessment > .button { grid-column: 2; justify-self: start; }

.company { display: grid; grid-template-columns: 1.2fr 1fr; min-height: 680px; }
.company-image-wrap { overflow: hidden; }
.company-image-wrap img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s cubic-bezier(.2,.7,.2,1); }
.company:hover .company-image-wrap img { transform: scale(1.025); }
.company-copy { align-self: center; padding: 80px var(--gutter); }
.company-copy h2 { font-size: clamp(40px, 4.8vw, 72px); }
.company-copy > p:not(.eyebrow) { color: rgba(255,255,255,.65); line-height: 1.75; max-width: 570px; margin: 26px 0 34px; }
.text-link-light { color: #fff; }

.site-footer { background: #04101d; color: #fff; padding: 65px var(--gutter) 35px; display: grid; grid-template-columns: 1fr 1fr; gap: 55px; align-items: start; }
.footer-brand { align-self: start; }
.site-footer > p { margin: 0; justify-self: end; max-width: 420px; color: rgba(255,255,255,.52); text-align: right; line-height: 1.6; }
.footer-meta { grid-column: 1 / -1; display: flex; justify-content: space-between; padding-top: 28px; border-top: 1px solid rgba(255,255,255,.15); color: rgba(255,255,255,.45); font-size: 11px; }
.footer-meta a { color: rgba(255,255,255,.78); }

.reveal { opacity: 0; transform: translateY(30px); transition: opacity .75s ease, transform .75s cubic-bezier(.2,.7,.2,1); }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

@media (max-width: 980px) {
  .site-header { height: 66px; }
  .menu-button { display: block; width: 42px; height: 42px; border: 0; background: transparent; color: currentColor; padding: 10px; }
  .menu-button span { display: block; width: 22px; height: 2px; background: currentColor; margin: 6px 0; transition: transform .2s ease; }
  .menu-button[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
  .menu-button[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }
  .site-nav { position: absolute; top: 66px; left: 0; right: 0; padding: 30px var(--gutter) 40px; background: var(--navy); flex-direction: column; align-items: flex-start; gap: 23px; transform: translateY(-130%); opacity: 0; pointer-events: none; transition: transform .3s ease, opacity .3s ease; }
  .site-nav.is-open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .constraint { grid-template-columns: .25fr 1fr; }
  .constraint-detail { grid-column: 2; padding-top: 0; }
  .ore-spectrum { grid-column: 2; }
  .process-step { grid-template-columns: .2fr 1fr; }
  .step-visual { grid-column: 2; margin: -40px 0 25px; max-width: 450px; }
  .comparison-row { grid-template-columns: .8fr 1.1fr 1fr; }
  .comparison-row > div:last-child { display: none; }
  .evidence, .company { grid-template-columns: 1fr; }
  .evidence > img, .company-image-wrap { height: 520px; }
  .study { grid-template-columns: .25fr 1fr; }
  .study-metrics { grid-column: 2; }
  .assessment { grid-template-columns: 1fr; gap: 35px; }
  .assessment > .button { grid-column: 1; }
}

@media (max-width: 680px) {
  :root { --section-pad: 82px; }
  .hero { min-height: 780px; }
  .hero-image { object-position: 61% center; }
  .hero-shade { background: linear-gradient(90deg, rgba(4,15,29,.94), rgba(4,15,29,.45)), linear-gradient(0deg, rgba(4,15,29,.75), transparent); }
  .hero-content { width: 100%; padding: 130px var(--gutter) 145px; }
  h1 { font-size: clamp(48px, 14vw, 68px); }
  .hero-copy { font-size: 16px; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 23px; }
  .hero-foot { left: var(--gutter); right: auto; bottom: 28px; flex-direction: column; gap: 6px; }
  .hero-foot span + span::before { content: none; }
  .constraint { grid-template-columns: 1fr; }
  .constraint .section-number { display: none; }
  .constraint-copy, .constraint-detail, .ore-spectrum { grid-column: 1; }
  .spectrum-labels { font-size: 11px; }
  .spectrum-labels span { width: 31%; }
  .process-step { grid-template-columns: 1fr; padding: 38px 0; }
  .step-copy { padding: 25px 0 40px; }
  .step-visual { grid-column: 1; margin: 0; min-width: 0; }
  .principles { grid-template-columns: 1fr; }
  .principle { min-height: 0; padding: 38px 28px; }
  .difference .section-number, .studies .section-number { display: none; }
  .comparison-table { overflow-x: auto; }
  .comparison-row { min-width: 700px; grid-template-columns: .85fr 1.1fr 1fr; }
  .comparison-highlight { margin: 0; padding: 0; }
  .evidence > img, .company-image-wrap { height: 360px; }
  .evidence-copy, .company-copy { padding: 70px var(--gutter); }
  .study { grid-template-columns: 1fr; gap: 22px; }
  .study-metrics { grid-column: 1; }
  .study-disclaimer { grid-template-columns: 1fr; }
  .site-footer { grid-template-columns: 1fr; }
  .site-footer > p { justify-self: start; text-align: left; }
  .footer-meta { flex-direction: column; gap: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}