:root {
  --charcoal: #1b1713;
  --charcoal-2: #251a13;
  --brown: #603718;
  --rust: #a94e22;
  --teal: #2f807c;
  --teal-light: #6bb7b0;
  --sand: #efe3d0;
  --sand-2: #f8f2e8;
  --stone: #827467;
  --white: #fff;
  --max: 1220px;
  --shadow: 0 28px 70px rgba(16, 12, 8, .22);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: Arial, Helvetica, sans-serif; background: var(--sand-2); color: var(--charcoal); line-height: 1.55; }
img { display: block; max-width: 100%; }
a { color: inherit; }
.container { width: min(var(--max), calc(100% - 42px)); margin-inline: auto; }
.skip-link { position: absolute; left: 16px; top: -80px; padding: 10px 14px; background: var(--teal); color: white; z-index: 100; }
.skip-link:focus { top: 16px; }

.site-header { position: fixed; inset: 0 0 auto 0; z-index: 40; background: linear-gradient(180deg, rgba(14,12,10,.82), rgba(14,12,10,.35), transparent); transition: background .25s ease, border-color .25s ease; }
.site-header.scrolled { background: rgba(22, 17, 13, .94); backdrop-filter: blur(16px); border-bottom: 1px solid rgba(255,255,255,.08); }
.nav-inner { min-height: 88px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand img { width: 250px; height: auto; filter: brightness(1.22) saturate(.92); }
.site-nav { display: flex; gap: 4px; align-items: center; }
.site-nav a { color: rgba(255,255,255,.88); text-decoration: none; font-weight: 800; font-size: .9rem; padding: 10px 12px; border-bottom: 2px solid transparent; }
.site-nav a:hover { color: white; border-bottom-color: var(--teal-light); }
.nav-toggle { display: none; color: white; background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.22); padding: 10px 14px; font-weight: 800; }

.hero { position: relative; min-height: 92vh; display: grid; align-items: end; overflow: hidden; background: var(--charcoal); color: white; }
.hero-media { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(13,10,8,.92) 0%, rgba(13,10,8,.74) 34%, rgba(13,10,8,.36) 70%, rgba(13,10,8,.18) 100%), linear-gradient(0deg, rgba(13,10,8,.88) 0%, rgba(13,10,8,.12) 36%), url('img/hero-pit-mining.jpg') center/cover no-repeat; transform: scale(1.03); }
.hero-content { position: relative; z-index: 1; padding: 150px 0 110px; }
.eyebrow { margin: 0 0 16px; color: var(--teal); text-transform: uppercase; letter-spacing: .16em; font-weight: 900; font-size: .78rem; }
.hero .eyebrow, .dark-section .eyebrow, .image-break .eyebrow { color: var(--teal-light); }
h1, h2, h3 { margin: 0; line-height: .98; color: var(--brown); }
h1 { max-width: 980px; color: white; font-family: Georgia, 'Times New Roman', serif; font-size: clamp(3.2rem, 7.5vw, 7rem); letter-spacing: -.065em; }
.hero-sub { max-width: 760px; margin: 28px 0 0; font-size: clamp(1.25rem, 2.4vw, 1.8rem); font-weight: 800; color: rgba(255,255,255,.9); }
.hero-body { max-width: 670px; color: rgba(255,255,255,.74); font-size: 1.08rem; margin: 18px 0 0; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.button { display: inline-flex; min-height: 50px; align-items: center; justify-content: center; padding: 13px 20px; font-weight: 900; text-decoration: none; border: 0; cursor: pointer; }
.button.primary { background: var(--teal); color: white; }
.button.primary:hover { background: #246b67; }
.button.ghost { color: white; border: 1px solid rgba(255,255,255,.28); background: rgba(255,255,255,.08); }
.button.ghost:hover { background: rgba(255,255,255,.17); }

.proof-strip { position: relative; z-index: 2; margin-top: -46px; }
.proof-grid { display: grid; grid-template-columns: repeat(3, 1fr); background: var(--charcoal); box-shadow: var(--shadow); }
.proof-item { padding: 30px; border-right: 1px solid rgba(255,255,255,.08); color: white; }
.proof-item:last-child { border-right: 0; }
.proof-item span { display: block; color: var(--teal-light); font-size: .78rem; text-transform: uppercase; letter-spacing: .12em; font-weight: 900; margin-bottom: 6px; }
.proof-item strong { display: block; font-size: 1.2rem; line-height: 1.2; }

.section { padding: 112px 0; }
.split-layout, .regional-grid { display: grid; grid-template-columns: .95fr 1.05fr; gap: 72px; align-items: center; }
.section-copy h2, .section-heading h2, .regional-copy h2, .contact-panel h2 { font-family: Georgia, 'Times New Roman', serif; font-size: clamp(2.45rem, 5vw, 5rem); letter-spacing: -.055em; margin-bottom: 24px; }
.section-copy p, .section-heading p, .regional-copy p, .contact-panel p { color: var(--stone); font-size: 1.06rem; max-width: 760px; }
.media-card { box-shadow: var(--shadow); overflow: hidden; background: var(--charcoal); }
.media-card img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }

.dark-section { background: linear-gradient(145deg, var(--charcoal), var(--charcoal-2)); color: white; }
.dark-section h2, .dark-section h3 { color: white; }
.dark-section .section-heading p { color: rgba(255,255,255,.66); }
.section-heading { max-width: 870px; margin-bottom: 48px; }
.capability-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid rgba(255,255,255,.12); border-left: 1px solid rgba(255,255,255,.12); }
.capability-card { padding: 30px; min-height: 238px; border-right: 1px solid rgba(255,255,255,.12); border-bottom: 1px solid rgba(255,255,255,.12); background: rgba(255,255,255,.035); }
.capability-card span { color: var(--teal-light); font-weight: 900; letter-spacing: .08em; font-size: .83rem; }
.capability-card h3 { font-size: 1.38rem; margin: 32px 0 12px; letter-spacing: -.02em; }
.capability-card p { color: rgba(255,255,255,.66); margin: 0; }

.image-break { position: relative; min-height: 520px; display: grid; place-items: center; overflow: hidden; background: var(--charcoal); color: white; }
.image-break img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .74; }
.image-break::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(27,23,19,.8), rgba(27,23,19,.25)); }
.image-break-copy { position: relative; z-index: 1; width: min(var(--max), calc(100% - 42px)); }
.image-break-copy p { max-width: 760px; font-family: Georgia, 'Times New Roman', serif; font-size: clamp(2.4rem, 5vw, 5.6rem); line-height: 1; letter-spacing: -.055em; margin: 0; }

.field-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 18px; }
.field-card { grid-column: span 4; background: white; box-shadow: 0 14px 42px rgba(68,47,28,.09); overflow: hidden; border: 1px solid rgba(96,55,24,.1); }
.field-card.large { grid-column: span 8; }
.field-card.wide { grid-column: span 8; }
.field-card img { width: 100%; height: 285px; object-fit: cover; }
.field-card.large img, .field-card.wide img { height: 390px; }
.field-card div { padding: 24px; }
.field-card h3 { font-size: 1.48rem; letter-spacing: -.025em; margin-bottom: 10px; }
.field-card p { margin: 0; color: var(--stone); }

.regional-section { background: var(--sand); }
.regional-list { display: grid; gap: 1px; background: rgba(96,55,24,.14); }
.regional-list div { background: var(--sand-2); padding: 26px; }
.regional-list strong { display: block; color: var(--brown); font-size: 1.18rem; margin-bottom: 6px; }
.regional-list span { color: var(--stone); }

.contact-section { background: var(--charcoal); color: white; padding: 86px 0; }
.contact-panel { display: grid; grid-template-columns: 1.1fr .9fr; gap: 60px; align-items: center; }
.contact-panel h2 { color: white; }
.contact-panel p { color: rgba(255,255,255,.68); }
.contact-actions { display: grid; gap: 12px; }
.contact-link { display: block; text-decoration: none; padding: 20px; border: 1px solid rgba(255,255,255,.12); background: rgba(255,255,255,.04); }
.contact-link:hover { background: rgba(255,255,255,.08); }
.contact-link span { display: block; color: var(--teal-light); text-transform: uppercase; letter-spacing: .12em; font-size: .74rem; font-weight: 900; margin-bottom: 4px; }
.contact-link strong { color: white; font-size: 1.3rem; }

.site-footer { background: #100d0b; color: rgba(255,255,255,.64); padding: 32px 0; }
.footer-inner { display: grid; grid-template-columns: 220px 1fr auto; gap: 24px; align-items: center; }
.footer-inner img { filter: brightness(1.3) saturate(.9); }
.footer-inner a { color: white; font-weight: 900; text-decoration: none; }

.reveal { opacity: 0; transform: translateY(20px); transition: opacity .65s ease, transform .65s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

@media (max-width: 980px) {
  .nav-toggle { display: inline-flex; }
  .site-nav { display: none; position: absolute; left: 20px; right: 20px; top: 78px; padding: 12px; background: rgba(22,17,13,.98); flex-direction: column; align-items: stretch; box-shadow: var(--shadow); }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 14px; }
  .proof-grid, .split-layout, .regional-grid, .contact-panel { grid-template-columns: 1fr; }
  .proof-item { border-right: 0; border-bottom: 1px solid rgba(255,255,255,.08); }
  .capability-grid { grid-template-columns: 1fr; }
  .field-grid { grid-template-columns: 1fr; }
  .field-card, .field-card.large, .field-card.wide { grid-column: auto; }
  .field-card img, .field-card.large img, .field-card.wide img { height: 310px; }
  .footer-inner { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .container { width: min(100% - 28px, var(--max)); }
  .brand img { width: 194px; }
  .nav-inner { min-height: 76px; }
  .hero { min-height: 840px; }
  .hero-content { padding: 124px 0 88px; }
  h1 { font-size: 3.05rem; }
  .section { padding: 76px 0; }
  .proof-strip { margin-top: 0; }
  .button { width: 100%; }
  .field-card img, .field-card.large img, .field-card.wide img { height: 240px; }
  .contact-link strong { font-size: 1.05rem; }
}