:root {
  --ink: #101312;
  --ink-2: #171b19;
  --ink-3: #252a27;
  --paper: #f3f0e9;
  --paper-2: #e9e5dc;
  --white: #fff;
  --copper: #c8743d;
  --copper-deep: #9f4d28;
  --copper-light: #efa46f;
  --muted: #5a615d;
  --line: rgba(16, 19, 18, .15);
  --line-light: rgba(255, 255, 255, .14);
  --shell: min(1180px, calc(100vw - 48px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Segoe UI", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
body, button { font-family: "Segoe UI", Arial, sans-serif; }
img { max-width: 100%; }
a { color: inherit; }
.shell { width: var(--shell); margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 100; padding: 12px 18px; color: #fff; background: var(--copper); text-decoration: none; }
.skip-link:focus { top: 16px; }

h1, h2, h3, p { margin-top: 0; }
h1, h2 { font-family: Georgia, "Times New Roman", serif; font-weight: 400; letter-spacing: -.038em; }
h1 { margin-bottom: 28px; font-size: clamp(3.25rem, 7vw, 6.8rem); line-height: .92; }
h2 { margin-bottom: 26px; font-size: clamp(2.55rem, 4.8vw, 4.9rem); line-height: 1.03; }
h3 { line-height: 1.15; }
.eyebrow, .section-label { margin: 0 0 20px; color: var(--copper-light); font-size: .72rem; font-weight: 800; letter-spacing: .23em; }
.section-label { color: var(--copper-deep); }

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 30;
  color: #fff;
  border-bottom: 1px solid rgba(255, 255, 255, .16);
  transition: background .25s ease, border-color .25s ease;
}
.site-header.scrolled { background: rgba(16, 19, 18, .96); border-color: rgba(255, 255, 255, .08); backdrop-filter: blur(14px); }
.header-inner { height: 86px; display: flex; align-items: center; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; line-height: 1; text-decoration: none; }
.brand-mark { padding-right: 13px; font-size: 1.42rem; font-weight: 850; letter-spacing: -.06em; }
.brand-division { padding-left: 13px; color: var(--copper-light); border-left: 1px solid rgba(255, 255, 255, .45); font-size: .72rem; font-weight: 700; letter-spacing: .25em; }
.main-nav { display: flex; align-items: center; gap: 21px; }
.main-nav a { color: rgba(255, 255, 255, .82); font-size: .82rem; letter-spacing: .03em; text-decoration: none; transition: color .2s ease; }
.main-nav a:hover, .main-nav a:focus-visible { color: #fff; }
.main-nav .nav-cta { padding: 10px 16px; color: #fff; border: 1px solid rgba(255, 255, 255, .46); }
.menu-toggle { display: none; padding: 9px; border: 0; background: transparent; }
.menu-toggle span:not(.sr-only) { display: block; width: 25px; height: 2px; margin: 5px 0; background: #fff; }

.hero {
  position: relative;
  min-height: 780px;
  height: min(920px, 100svh);
  color: #fff;
  background: var(--ink);
  overflow: hidden;
}
.hero-photo { position: absolute; inset: 0; background: url("assets/hero-el-llano.webp") 58% center / cover no-repeat; transform: scale(1.01); }
.hero-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(8, 10, 9, .95) 0%, rgba(8, 10, 9, .76) 48%, rgba(8, 10, 9, .27) 78%, rgba(8, 10, 9, .34) 100%), linear-gradient(0deg, rgba(8, 10, 9, .74), transparent 48%); }
.hero-grid { position: relative; z-index: 2; height: 100%; display: grid; grid-template-columns: 1.32fr .68fr; gap: 70px; align-items: center; padding-top: 88px; }
.hero-copy { max-width: 780px; }
.hero h1 em { color: var(--copper-light); font-weight: 400; }
.hero-lead { max-width: 700px; margin-bottom: 34px; color: rgba(255, 255, 255, .82); font-size: clamp(1.04rem, 1.55vw, 1.28rem); line-height: 1.55; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 50px; padding: 13px 21px; border: 1px solid transparent; font-size: .8rem; font-weight: 800; letter-spacing: .06em; text-decoration: none; text-transform: uppercase; transition: transform .2s ease, background .2s ease, border-color .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: #fff; background: var(--copper); }
.button-primary:hover { background: #d6844a; }
.button-ghost { color: #fff; border-color: rgba(255, 255, 255, .46); background: rgba(255, 255, 255, .03); }
.proof-line { display: flex; flex-wrap: wrap; gap: 15px 28px; padding: 0; margin: 38px 0 0; color: rgba(255, 255, 255, .67); font-size: .76rem; letter-spacing: .08em; list-style: none; text-transform: uppercase; }
.proof-line li { position: relative; padding-left: 14px; }
.proof-line li::before { content: ""; position: absolute; left: 0; top: .58em; width: 5px; height: 5px; background: var(--copper); }
.process-card { align-self: end; margin-bottom: 86px; padding: 28px; border-top: 3px solid var(--copper); background: rgba(16, 19, 18, .84); backdrop-filter: blur(12px); }
.card-kicker { margin-bottom: 20px; color: var(--copper-light); font-size: .65rem; font-weight: 800; letter-spacing: .18em; }
.process-card ol { padding: 0; margin: 0 0 18px; list-style: none; }
.process-card li { display: flex; gap: 15px; align-items: center; padding: 12px 0; border-bottom: 1px solid rgba(255, 255, 255, .12); }
.process-card li span { color: var(--copper-light); font: 400 1.12rem Georgia, serif; }
.process-card li strong { font-size: .88rem; letter-spacing: .01em; }
.process-card p { margin-bottom: 0; color: rgba(255, 255, 255, .58); font-size: .78rem; }

.snapshot { color: #fff; background: var(--copper-deep); }
.snapshot-grid { display: grid; grid-template-columns: repeat(3, 1fr); }
.snapshot-grid > div { display: flex; gap: 18px; align-items: center; min-height: 120px; padding: 22px 38px; border-left: 1px solid rgba(255, 255, 255, .2); }
.snapshot-grid > div:last-child { border-right: 1px solid rgba(255, 255, 255, .2); }
.snapshot-grid strong { font: 400 2.6rem Georgia, serif; }
.snapshot-grid span { color: rgba(255, 255, 255, .77); font-size: .74rem; font-weight: 750; letter-spacing: .08em; text-transform: uppercase; }

.strategic-section { padding: 125px 0 135px; color: #fff; background: var(--ink-2); }
.strategic-grid { display: grid; grid-template-columns: 1.12fr .88fr; gap: 72px; align-items: center; }
.strategic-section .section-label { color: var(--copper-light); }
.strategic-copy h2 { max-width: 720px; }
.strategic-copy > p:not(.section-label) { max-width: 700px; color: rgba(255, 255, 255, .65); }
.strategic-copy .strategic-lead { color: rgba(255, 255, 255, .82); font-size: 1.08rem; }
.strategic-flow { display: flex; align-items: center; gap: 12px; margin-top: 43px; color: rgba(255, 255, 255, .67); font-size: .75rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.strategic-flow i { position: relative; flex: 1; min-width: 18px; height: 1px; background: linear-gradient(90deg, var(--copper), rgba(239, 164, 111, .22)); }
.strategic-flow i::after { content: ""; position: absolute; right: 0; top: -3px; width: 7px; height: 7px; border-top: 1px solid var(--copper-light); border-right: 1px solid var(--copper-light); transform: rotate(45deg); }
.ballast-card { position: relative; padding: 46px 43px 40px; color: var(--ink); border-top: 5px solid var(--copper); background: var(--paper); box-shadow: 0 28px 70px rgba(0, 0, 0, .28); }
.ballast-card::after { content: "B"; position: absolute; right: 28px; top: 5px; color: rgba(159, 77, 40, .07); font: 400 10rem/1 Georgia, serif; pointer-events: none; }
.ballast-kicker { position: relative; z-index: 1; margin-bottom: 31px; color: var(--copper-deep); font-size: .75rem; font-weight: 800; letter-spacing: .19em; }
.ballast-card h3 { position: relative; z-index: 1; max-width: 390px; margin-bottom: 18px; font: 400 clamp(2.5rem, 4.2vw, 4.2rem)/.95 Georgia, serif; letter-spacing: -.045em; }
.ballast-card h3 strong { display: block; color: var(--copper-deep); font-weight: 400; }
.ballast-card > p:not(.ballast-kicker):not(.ballast-note) { position: relative; z-index: 1; color: #4e5551; font-size: .9rem; }
.ballast-card ul { position: relative; z-index: 1; padding: 0; margin: 28px 0 23px; border-top: 1px solid var(--line); list-style: none; }
.ballast-card li { display: grid; grid-template-columns: 38px 1fr; gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--line); font-size: .78rem; font-weight: 700; }
.ballast-card li span { color: var(--copper-deep); font: 400 .9rem Georgia, serif; }
.ballast-note { margin-bottom: 0; padding: 13px 15px; color: #555c58; border-left: 2px solid var(--copper); background: #e9e5dc; font-size: .75rem; }

.focus-section { padding: 125px 0 135px; }
.intro-grid { display: grid; grid-template-columns: 1fr .85fr; gap: 90px; align-items: start; }
.intro-copy { padding-top: 42px; color: #454c48; font-size: 1.07rem; }
.intro-copy p + p { margin-top: 18px; }
.focus-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; margin-top: 70px; background: var(--line); }
.focus-card { position: relative; min-height: 430px; padding: 44px; background: #faf8f3; overflow: hidden; }
.focus-card::after { content: ""; position: absolute; right: -75px; bottom: -105px; width: 270px; height: 270px; border: 1px solid rgba(16, 19, 18, .08); transform: rotate(45deg); }
.focus-topline { display: flex; align-items: center; gap: 14px; margin-bottom: 72px; color: var(--copper-deep); font-size: .64rem; font-weight: 800; letter-spacing: .15em; }
.focus-topline i { flex: 1; height: 1px; background: rgba(159, 77, 40, .25); }
.focus-card .card-number { position: absolute; top: 42px; right: 42px; color: #bbb9b2; font: 400 2rem Georgia, serif; }
.focus-card h3 { margin-bottom: 15px; font-size: 1.55rem; }
.focus-card > p:not(.card-number) { max-width: 520px; color: #515854; }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 35px; }
.tag-row span { padding: 8px 11px; border: 1px solid var(--line); font-size: .71rem; font-weight: 750; letter-spacing: .06em; text-transform: uppercase; }
.mineral-row { display: flex; gap: 9px; margin-top: 32px; }
.mineral-row span { display: grid; place-items: center; width: 68px; height: 68px; color: var(--copper-deep); border: 1px solid rgba(159, 77, 40, .45); font: 700 .95rem Georgia, serif; }
.mineral-row small { display: block; font: 700 .48rem "Segoe UI", sans-serif; letter-spacing: .1em; }

.system-section { padding: 125px 0 135px; color: #fff; background: var(--ink-2); }
.system-section .section-label, .mines-section .section-label, .quality-section .section-label, .contact-section .section-label { color: var(--copper-light); }
.system-heading { display: grid; grid-template-columns: 1fr .58fr; gap: 85px; align-items: end; margin-bottom: 62px; }
.system-heading h2 { max-width: 760px; margin-bottom: 0; }
.system-heading > p { margin-bottom: 5px; color: rgba(255, 255, 255, .62); }
.system-layout { display: grid; grid-template-columns: .98fr 1.02fr; gap: 78px; align-items: start; }
.system-visual { position: sticky; top: 120px; margin: 0; }
.system-visual img { display: block; width: 100%; aspect-ratio: 4 / 3; object-fit: cover; filter: saturate(.8) contrast(1.05); }
.system-visual figcaption { padding: 12px 0; color: rgba(255, 255, 255, .46); font-size: .72rem; }
.timeline { padding: 0; margin: 0; list-style: none; }
.timeline li { display: grid; grid-template-columns: 58px 1fr; gap: 22px; padding: 24px 0; border-top: 1px solid var(--line-light); }
.timeline li:last-child { border-bottom: 1px solid var(--line-light); }
.timeline span { color: var(--copper-light); font: 400 1.08rem Georgia, serif; }
.timeline h3 { margin-bottom: 6px; font-size: 1.17rem; }
.timeline p { margin-bottom: 0; color: rgba(255, 255, 255, .57); font-size: .89rem; }

.materials-section { padding: 120px 0 130px; background: var(--paper-2); }
.section-heading { display: grid; grid-template-columns: 1fr .62fr; gap: 78px; align-items: end; margin-bottom: 55px; }
.section-heading h2 { margin-bottom: 0; }
.section-heading > p { color: var(--muted); }
.materials-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: rgba(16, 19, 18, .14); }
.materials-grid article { position: relative; min-height: 210px; padding: 38px 38px 35px 108px; background: var(--paper); }
.materials-grid article > span { position: absolute; left: 35px; top: 39px; display: grid; place-items: center; width: 48px; height: 48px; color: var(--copper-deep); border: 1px solid rgba(159, 77, 40, .45); font: 400 .87rem Georgia, serif; }
.materials-grid h3 { margin: 0 0 10px; font-size: 1.2rem; }
.materials-grid p { margin-bottom: 0; color: #59605c; font-size: .91rem; }
.materials-grid .material-primary { color: #fff; border-top: 4px solid var(--copper); background: var(--ink-2); }
.materials-grid .material-primary h3 { color: #fff; }
.materials-grid .material-primary > p:not(.material-badge) { color: rgba(255, 255, 255, .65); }
.materials-grid .material-primary > span { color: var(--copper-light); border-color: rgba(239, 164, 111, .55); }
.materials-grid .material-rail { border-top: 4px solid var(--copper-deep); background: #ded9cf; }
.materials-grid .material-badge { margin: 0 0 8px; color: var(--copper-light); font-size: .75rem; font-weight: 850; letter-spacing: .15em; }
.materials-grid .material-rail .material-badge { color: var(--copper-deep); }
.materials-grid .material-note { background: var(--ink-3); }
.materials-grid .material-note { grid-column: 1 / -1; }
.materials-grid .material-note h3 { color: #fff; }
.materials-grid .material-note p { color: rgba(255, 255, 255, .6); }
.materials-grid .material-note > span { color: var(--copper-light); border-color: rgba(239, 164, 111, .55); }

.capacity-section { padding: 125px 0 135px; background: #f7f4ed; }
.capacity-heading { display: grid; grid-template-columns: 1fr .63fr; gap: 85px; align-items: end; margin-bottom: 58px; }
.capacity-heading h2 { max-width: 800px; margin-bottom: 0; }
.capacity-heading > p { margin-bottom: 7px; color: var(--muted); }
.capacity-grid { display: grid; grid-template-columns: 1.08fr .92fr; align-items: stretch; }
.capacity-photo { display: flex; flex-direction: column; margin: 0; background: #292e2b; overflow: hidden; }
.capacity-photo img { flex: 1; display: block; width: 100%; min-height: 690px; object-fit: cover; object-position: left center; filter: saturate(.82) contrast(1.04); }
.capacity-photo figcaption { padding: 12px 16px; color: rgba(255, 255, 255, .48); background: var(--ink-3); font-size: .7rem; }
.equipment-panel { padding: 38px 42px 34px; color: #fff; background: var(--ink); }
.equipment-overline { margin-bottom: 18px; color: var(--copper-light); font-size: .66rem; font-weight: 800; letter-spacing: .18em; }
.equipment-row { display: grid; grid-template-columns: 42px 1fr; gap: 17px; padding: 17px 0; border-top: 1px solid var(--line-light); }
.equipment-row span { color: var(--copper-light); font: 400 1rem Georgia, serif; }
.equipment-row strong { display: block; margin-bottom: 3px; font-size: .92rem; }
.equipment-row p { margin: 0; color: rgba(255, 255, 255, .55); font-size: .8rem; }
.equipment-note { margin: 21px 0 0; padding: 14px 16px; color: #d5d1c7; border-left: 2px solid var(--copper); background: rgba(255, 255, 255, .05); font-size: .72rem; }
.operating-pillars { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2px; margin-top: 44px; background: var(--line); }
.operating-pillars article { min-height: 325px; padding: 36px 34px; background: #ece8df; }
.operating-pillars .pillar-safety { color: #fff; background: linear-gradient(rgba(16, 19, 18, .86), rgba(16, 19, 18, .88)), url("assets/el-llano-supervision.webp") center 25% / cover no-repeat; }
.pillar-number { margin-bottom: 42px; color: var(--copper-deep); font: 400 1.2rem Georgia, serif; }
.pillar-safety .pillar-number { color: var(--copper-light); }
.operating-pillars h3 { max-width: 290px; margin-bottom: 14px; font-size: 1.3rem; }
.operating-pillars article > p:not(.pillar-number) { color: #59605c; font-size: .88rem; }
.operating-pillars .pillar-safety > p:not(.pillar-number) { color: rgba(255, 255, 255, .66); }
.pillar-tags { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 28px; }
.pillar-tags span { padding: 7px 9px; border: 1px solid rgba(16, 19, 18, .18); font-size: .62rem; font-weight: 800; letter-spacing: .06em; text-transform: uppercase; }
.pillar-safety .pillar-tags span { border-color: rgba(255, 255, 255, .3); }

.mines-section { padding: 125px 0 140px; color: #fff; background: var(--ink-3); }
.section-heading.light > p { color: rgba(255, 255, 255, .6); }
.mine-profiles { display: grid; gap: 100px; }
.mine-profile { display: grid; grid-template-columns: 1.05fr .95fr; gap: 70px; align-items: center; }
.mine-profile.reverse .mine-gallery { order: 2; }
.mine-profile.reverse .mine-copy { order: 1; }
.mine-gallery { display: grid; grid-template-columns: 1.7fr .7fr; grid-template-rows: repeat(2, 210px); gap: 8px; min-width: 0; }
.mine-gallery img { display: block; width: 100%; height: 100%; object-fit: cover; background: #343a37; }
.mine-gallery .gallery-main { grid-row: 1 / span 2; }
.llano-gallery img:last-child { object-position: center 18%; }
.pirio-gallery .gallery-main { object-position: center 40%; }
.mine-place { margin-bottom: 13px; color: var(--copper-light); font-size: .68rem; font-weight: 800; letter-spacing: .15em; }
.mine-copy h3 { margin-bottom: 18px; font: 400 clamp(2.7rem, 4.6vw, 4.7rem) Georgia, serif; letter-spacing: -.04em; }
.mine-copy > p:not(.mine-place) { color: rgba(255, 255, 255, .67); font-size: 1rem; }
.mine-copy dl { margin: 30px 0; border-top: 1px solid var(--line-light); }
.mine-copy dl div { display: grid; grid-template-columns: 150px 1fr; gap: 22px; padding: 14px 0; border-bottom: 1px solid var(--line-light); }
.mine-copy dt { color: rgba(255, 255, 255, .45); font-size: .7rem; font-weight: 800; letter-spacing: .05em; text-transform: uppercase; }
.mine-copy dd { margin: 0; font-size: .88rem; }
.text-link { display: inline-flex; gap: 16px; align-items: center; color: var(--copper-light); font-size: .75rem; font-weight: 800; letter-spacing: .06em; text-decoration: none; text-transform: uppercase; }
.text-link span { font-size: 1rem; transition: transform .2s ease; }
.text-link:hover span { transform: translate(3px, 3px); }

.maps-section { padding: 120px 0 130px; background: #dedbd3; }
.maps-title { max-width: 950px; margin-bottom: 48px; }
.maps-title h2 { margin-bottom: 18px; }
.maps-title > p:last-child { max-width: 650px; color: #59605c; }
.maps-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.map-card { background: var(--paper); box-shadow: 0 18px 50px rgba(16, 19, 18, .08); }
.map-frame { height: 355px; background: #c8c8c2; overflow: hidden; }
.map-frame iframe { display: block; width: 100%; height: 100%; border: 0; filter: grayscale(.35) contrast(1.04); }
.map-copy { display: flex; align-items: flex-end; justify-content: space-between; gap: 22px; padding: 26px 28px 28px; }
.map-copy small { color: var(--copper-deep); font-size: .61rem; font-weight: 800; letter-spacing: .16em; }
.map-copy h3 { margin: 5px 0 4px; font: 400 2rem Georgia, serif; }
.map-copy p { margin: 0; color: #626762; font-size: .82rem; }
.map-copy > a { padding: 10px 12px; color: var(--copper-deep); border: 1px solid rgba(159, 77, 40, .4); font-size: .68rem; font-weight: 800; letter-spacing: .05em; text-decoration: none; text-transform: uppercase; white-space: nowrap; }

.dossier-section { padding: 125px 0 130px; background: var(--paper); }
.dossier-grid { display: grid; grid-template-columns: .86fr 1.14fr; gap: 105px; align-items: start; }
.dossier-intro { position: sticky; top: 120px; }
.dossier-intro h2 { max-width: 610px; }
.dossier-intro > p:not(.section-label):not(.dossier-note) { max-width: 610px; color: var(--muted); font-size: 1.02rem; }
.dossier-note { margin-top: 27px; padding: 15px 17px; color: #525955; border-left: 2px solid var(--copper); background: var(--paper-2); font-size: .76rem; }
.dossier-list { padding: 0; margin: 0; border-top: 1px solid var(--line); list-style: none; }
.dossier-list li { display: grid; grid-template-columns: 52px 1fr; gap: 20px; padding: 23px 0; border-bottom: 1px solid var(--line); }
.dossier-list span { color: var(--copper-deep); font: 400 1.07rem Georgia, serif; }
.dossier-list strong { display: block; margin-bottom: 6px; font-size: 1rem; }
.dossier-list p { margin: 0; color: var(--muted); font-size: .86rem; }

.quality-section { padding: 130px 0; color: #fff; background: #111412; }
.quality-grid { display: grid; grid-template-columns: .76fr 1.24fr; gap: 95px; align-items: center; }
.quality-photo { margin: 0; }
.quality-photo img { display: block; width: 100%; height: 680px; object-fit: cover; object-position: center 34%; filter: saturate(.72) contrast(1.04); }
.quality-photo figcaption { padding-top: 10px; color: rgba(255, 255, 255, .43); font-size: .7rem; }
.quality-copy > p:not(.section-label):not(.confidential-note) { color: rgba(255, 255, 255, .66); }
.quality-list { padding: 0; margin: 35px 0 28px; list-style: none; }
.quality-list li { display: grid; grid-template-columns: 50px 1fr; gap: 20px; padding: 17px 0; border-top: 1px solid var(--line-light); }
.quality-list li:last-child { border-bottom: 1px solid var(--line-light); }
.quality-list span { color: var(--copper-light); font: 400 1rem Georgia, serif; }
.quality-list strong { display: block; margin-bottom: 3px; font-size: .93rem; }
.quality-list p { margin: 0; color: rgba(255, 255, 255, .53); font-size: .83rem; }
.confidential-note { padding: 15px 17px; color: #d8d4ca; border-left: 2px solid var(--copper); background: rgba(255, 255, 255, .05); font-size: .76rem; }

.trace-section { padding: 125px 0; }
.trace-grid { display: grid; grid-template-columns: 1fr .78fr; gap: 100px; align-items: center; }
.trace-grid > div:first-child > p:last-child { max-width: 620px; color: var(--muted); font-size: 1.04rem; }
.cost-stack { border-top: 1px solid var(--line); }
.cost-stack div { display: grid; grid-template-columns: 48px 1fr; gap: 18px; padding: 17px 0; border-bottom: 1px solid var(--line); }
.cost-stack span { color: var(--copper-deep); font: 400 1rem Georgia, serif; }
.cost-stack p { margin: 0; font-weight: 650; }
.trace-flow { display: flex; align-items: center; justify-content: space-between; gap: 15px; margin-top: 78px; color: #565d59; font-size: .67rem; font-weight: 800; letter-spacing: .15em; }
.trace-flow i { position: relative; flex: 1; height: 1px; background: linear-gradient(90deg, var(--copper), rgba(200, 116, 61, .18)); }
.trace-flow i::after { content: ""; position: absolute; right: 0; top: -3px; width: 7px; height: 7px; border-top: 1px solid var(--copper); border-right: 1px solid var(--copper); transform: rotate(45deg); }

.contact-section { padding: 120px 0; color: #fff; border-top: 4px solid var(--copper); background: var(--ink); }
.contact-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 100px; }
.contact-grid h2 { max-width: 700px; }
.contact-grid > div > p:not(.section-label) { max-width: 650px; margin-bottom: 35px; color: rgba(255, 255, 255, .64); }
.contact-data { border-top: 1px solid var(--line-light); font-style: normal; }
.contact-data div { padding: 20px 0; border-bottom: 1px solid var(--line-light); }
.contact-data small { display: block; margin-bottom: 6px; color: var(--copper-light); font-size: .62rem; font-weight: 800; letter-spacing: .18em; }
.contact-data a { font-size: 1.04rem; text-decoration: none; }
.contact-data p { margin: 0; color: rgba(255, 255, 255, .7); }
.contact-data .phone-list a { display: block; width: fit-content; margin-top: 5px; }
.site-footer { padding: 32px 0; color: rgba(255, 255, 255, .62); background: #090b0a; }
.footer-inner { display: grid; grid-template-columns: auto 1fr auto; gap: 35px; align-items: center; font-size: .75rem; }
.footer-inner p { margin: 0; }
.footer-brand .brand-mark { color: #fff; }
.footer-inner > a { text-decoration: none; }

@media (max-width: 1020px) {
  :root { --shell: min(100% - 36px, 800px); }
  .menu-toggle { display: block; }
  .main-nav { position: fixed; inset: 86px 0 auto; display: none; flex-direction: column; align-items: stretch; gap: 0; padding: 10px 18px 22px; background: rgba(16, 19, 18, .98); }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 15px; border-bottom: 1px solid rgba(255, 255, 255, .1); }
  .main-nav .nav-cta { margin-top: 10px; text-align: center; }
  .hero { height: auto; min-height: 860px; }
  .hero-grid { grid-template-columns: 1fr; gap: 34px; padding: 150px 0 100px; }
  .process-card { align-self: auto; max-width: 570px; margin: 0; }
  .strategic-grid, .intro-grid, .system-heading, .system-layout, .section-heading, .capacity-heading, .capacity-grid, .mine-profile, .dossier-grid, .quality-grid, .trace-grid, .contact-grid { grid-template-columns: 1fr; gap: 42px; }
  .intro-copy { padding-top: 0; }
  .focus-grid, .materials-grid, .maps-grid { grid-template-columns: 1fr; }
  .system-visual { position: static; }
  .capacity-photo img { min-height: 0; aspect-ratio: 16 / 9; object-position: center; }
  .operating-pillars { grid-template-columns: 1fr; }
  .operating-pillars article { min-height: auto; }
  .mine-profile.reverse .mine-gallery, .mine-profile.reverse .mine-copy { order: initial; }
  .mine-profiles { gap: 90px; }
  .mine-gallery { grid-template-rows: repeat(2, 240px); }
  .dossier-intro { position: static; }
  .quality-photo { max-width: 570px; }
  .quality-photo img { height: 620px; }
  .footer-inner { grid-template-columns: 1fr; gap: 15px; }
}

@media (max-width: 700px) {
  :root { --shell: calc(100% - 28px); }
  .header-inner { height: 72px; }
  .main-nav { top: 72px; }
  .hero-photo { background-position: 64% center; }
  .hero-grid { padding-top: 125px; }
  h1 { font-size: clamp(3rem, 14vw, 4.4rem); }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .proof-line { flex-direction: column; gap: 9px; }
  .process-card { padding: 22px; }
  .snapshot-grid { grid-template-columns: 1fr; }
  .snapshot-grid > div { min-height: 92px; padding: 15px 22px; border-left: 0; border-bottom: 1px solid rgba(255, 255, 255, .18); }
  .snapshot-grid > div:last-child { border-right: 0; }
  .strategic-section, .focus-section, .system-section, .materials-section, .capacity-section, .mines-section, .maps-section, .dossier-section, .quality-section, .trace-section, .contact-section { padding: 86px 0; }
  .strategic-flow { display: grid; grid-template-columns: 1fr; gap: 8px; }
  .strategic-flow i { width: 1px; height: 23px; margin-left: 7px; background: linear-gradient(180deg, var(--copper), rgba(239, 164, 111, .22)); }
  .strategic-flow i::after { top: auto; right: -3px; bottom: 0; transform: rotate(135deg); }
  .ballast-card { padding: 37px 25px 28px; }
  .focus-card { min-height: auto; padding: 31px 24px; }
  .focus-topline { margin-bottom: 45px; }
  .focus-card .card-number { top: 28px; right: 24px; }
  .mineral-row span { width: 57px; height: 57px; }
  .materials-grid article { min-height: auto; padding: 28px 22px 28px 88px; }
  .materials-grid article > span { left: 22px; top: 29px; }
  .equipment-panel { padding: 28px 23px; }
  .equipment-row { grid-template-columns: 36px 1fr; gap: 12px; }
  .operating-pillars article { padding: 31px 24px; }
  .pillar-number { margin-bottom: 28px; }
  .mine-gallery { grid-template-columns: 1fr 1fr; grid-template-rows: 310px 175px; gap: 6px; }
  .mine-gallery .gallery-main { grid-column: 1 / span 2; grid-row: 1; }
  .mine-copy dl div { grid-template-columns: 1fr; gap: 5px; }
  .map-frame { height: 310px; }
  .map-copy { align-items: flex-start; padding: 22px; }
  .quality-photo { max-width: none; }
  .quality-photo img { height: 520px; }
  .trace-flow { display: grid; grid-template-columns: 1fr; gap: 9px; margin-top: 55px; }
  .trace-flow i { width: 1px; height: 28px; margin-left: 8px; background: linear-gradient(180deg, var(--copper), rgba(200, 116, 61, .18)); }
  .trace-flow i::after { top: auto; right: -3px; bottom: 0; transform: rotate(135deg); }
}

@media (max-width: 430px) {
  .mineral-row { gap: 6px; }
  .mineral-row span { width: 52px; height: 52px; }
  .map-copy { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}