:root {
  --navy: #10263f;
  --gold: #c69b45;
  --ink: #243447;
  --muted: #617184;
  --paper: #f5f7fa;
  --line: #e2e8ef;
  --white: #fff;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--ink);
  line-height: 1.6;
  background: var(--white);
}

img { max-width: 100%; }

a { color: inherit; text-decoration: none; }

:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

.wrap {
  width: min(1120px, 92%);
  margin: auto;
}

[id] { scroll-margin-top: 84px; }

header {
  background: var(--navy);
  color: var(--white);
  position: sticky;
  top: 0;
  z-index: 10;
  box-shadow: 0 3px 14px #07172735;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 15px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  letter-spacing: 1.4px;
  font-size: 20px;
}

.brand img {
  width: 44px;
  height: 44px;
  flex: none;
}

.brand span {
  display: block;
  color: #e4c47e;
  font-size: 10px;
  letter-spacing: 3px;
  font-weight: 600;
}

nav {
  display: flex;
  gap: 22px;
  font-size: 14px;
}

nav a:hover { color: #e4c47e; }

.hero {
  color: var(--white);
  background:
    linear-gradient(110deg, rgba(9, 27, 46, 0.96), rgba(16, 48, 75, 0.83)),
    url("https://commons.wikimedia.org/wiki/Special:FilePath/CAT_797_SDB_BHPBilliton_Escondida_Chile_2_HR.jpg?width=1800") center/cover;
  min-height: 510px;
  display: flex;
  align-items: center;
}

.hero-content {
  max-width: 760px;
  padding: 85px 0;
}

.eyebrow {
  color: #e4c47e;
  text-transform: uppercase;
  letter-spacing: 2.5px;
  font-weight: 700;
  font-size: 12px;
}

h1 {
  font-size: clamp(34px, 4.6vw, 52px);
  line-height: 1.08;
  margin: 17px 0;
}

.hero p {
  font-size: 18px;
  color: #e1e9f0;
  max-width: 650px;
}

.btn {
  display: inline-block;
  background: var(--gold);
  color: #13283e;
  padding: 13px 22px;
  border: 0;
  border-radius: 4px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  margin: 12px 10px 0 0;
}

.btn.outline {
  background: transparent;
  color: var(--white);
  border: 1px solid var(--white);
}

.btn:disabled {
  opacity: 0.7;
  cursor: wait;
}

section { padding: 76px 0; }

.section-head {
  text-align: center;
  max-width: 730px;
  margin: 0 auto 38px;
}

.section-head h2 {
  color: var(--navy);
  font-size: 34px;
  margin: 0 0 10px;
}

.section-head p {
  color: var(--muted);
  margin: 0;
}

.intro { background: var(--paper); }

.intro-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
}

.intro h2 {
  font-size: 32px;
  color: var(--navy);
  line-height: 1.2;
  margin: 8px 0 12px;
}

.intro p { color: var(--muted); }

.promise {
  background: var(--navy);
  color: var(--white);
  border-left: 5px solid var(--gold);
  padding: 28px;
  border-radius: 5px;
}

.promise strong {
  font-size: 20px;
  display: block;
  margin-bottom: 8px;
}

.product {
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: 36px;
  align-items: center;
  padding: 34px 0;
  border-top: 1px solid var(--line);
}

.product:first-of-type { border-top: 0; padding-top: 0; }

.product:nth-child(even) .product-copy { order: 2; }

.number {
  color: var(--gold);
  font-weight: 800;
  letter-spacing: 1px;
  font-size: 12px;
}

.product h3 {
  color: var(--navy);
  font-size: 28px;
  line-height: 1.25;
  margin: 8px 0 10px;
}

.product p,
.product li { color: var(--muted); }

.product ul {
  margin: 14px 0 0;
  padding-left: 18px;
}

.product li + li { margin-top: 6px; }

.carousel { position: relative; }

.carousel-viewport {
  overflow: hidden;
  border-radius: 8px;
  background: var(--navy);
}

.carousel-track {
  display: flex;
  transition: transform 0.45s ease;
}

.slide {
  position: relative;
  flex: 0 0 100%;
  margin: 0;
}

.slide img {
  width: 100%;
  height: 340px;
  object-fit: cover;
  display: block;
}

.slide figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  margin: 0;
  padding: 36px 16px 14px;
  background: linear-gradient(transparent, rgba(9, 27, 46, 0.9));
  color: var(--white);
  font-size: 14px;
}

.carousel-nav {
  position: absolute;
  top: 150px;
  background: rgba(16, 38, 63, 0.88);
  color: var(--white);
  border: 0;
  border-radius: 4px;
  padding: 8px 10px;
  font: inherit;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}

.carousel-nav.prev { left: 10px; }
.carousel-nav.next { right: 10px; }

.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 12px;
}

.dot {
  width: 10px;
  height: 10px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: #c5d0dc;
  cursor: pointer;
}

.dot[aria-current="true"] { background: var(--gold); }

.partners { background: var(--paper); }

.partner-grid {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin: 0;
  padding: 0;
}

.partner-grid li {
  background: var(--white);
  border: 1px solid var(--line);
  border-top: 3px solid var(--gold);
  border-radius: 8px;
  padding: 22px 18px;
  text-align: center;
}

.partner-mark {
  width: 64px;
  height: 64px;
  margin: 0 auto 12px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--navy);
  color: #e4c47e;
  font-weight: 800;
  letter-spacing: 1px;
}

.partner-grid h3 {
  color: var(--navy);
  font-size: 17px;
  margin: 0 0 6px;
}

.partner-grid p {
  color: var(--muted);
  font-size: 14px;
  margin: 0;
}

.partner-grid img {
  width: 120px;
  height: 64px;
  object-fit: contain;
  display: block;
  margin: 0 auto 12px;
}

.why { background: var(--white); }

.features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.feature {
  background: var(--paper);
  padding: 22px;
  border-radius: 7px;
  border-top: 3px solid var(--gold);
}

.feature h3 {
  color: var(--navy);
  font-size: 17px;
  margin: 8px 0;
}

.feature p {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
}

.contact { background: var(--navy); color: var(--white); }

.contact .section-head h2 { color: var(--white); }
.contact .section-head p { color: #d4dee8; }

.contact-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 28px;
  align-items: start;
}

.enquiry {
  background: var(--white);
  color: var(--ink);
  padding: 26px;
  border-radius: 8px;
}

.enquiry h3 {
  color: var(--navy);
  margin: 0 0 14px;
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.field { margin-bottom: 12px; }

.field label {
  display: block;
  font-size: 13px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 5px;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid #d5dee8;
  border-radius: 4px;
  font: inherit;
  color: var(--ink);
  background: var(--white);
}

.field input[aria-invalid="true"],
.field select[aria-invalid="true"],
.field textarea[aria-invalid="true"] {
  border-color: #9d2c2c;
}

.field-error {
  min-height: 1.1em;
  margin: 4px 0 0;
  color: #9d2c2c;
  font-size: 12px;
}

.form-status {
  min-height: 1.2em;
  margin: 10px 0 0;
  font-size: 14px;
  color: var(--navy);
}

.form-status.is-error { color: #9d2c2c; }

.hp {
  position: absolute;
  left: -10000px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.contact-details { display: grid; gap: 16px; }

.contact-box {
  padding: 26px;
  border: 1px solid #ffffff30;
  border-radius: 8px;
}

.contact-box h3 {
  color: #e4c47e;
  margin-top: 0;
}

.contact-box p {
  margin: 9px 0;
  color: #e4eaf0;
}

.contact-box a {
  color: var(--white);
  text-decoration: underline;
  text-decoration-color: var(--gold);
}

footer {
  background: #091b2c;
  color: #b9c5d0;
  text-align: center;
  padding: 22px;
  font-size: 13px;
}

.small { font-size: 12px; color: #9eacba; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .carousel-track { transition: none; }
}

@media (max-width: 900px) {
  .product,
  .product:nth-child(even) .product-copy { order: 0; }
  .product,
  .intro-grid,
  .contact-grid,
  .partner-grid,
  .features {
    grid-template-columns: 1fr 1fr;
  }
  .product { grid-template-columns: 1fr; }
}

@media (max-width: 800px) {
  nav { gap: 12px; font-size: 12px; }
  .hero { min-height: 450px; }
}

@media (max-width: 640px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }
  nav { flex-wrap: wrap; }
  .hero-content { padding: 65px 0; }
  .field-row,
  .partner-grid,
  .features,
  .intro-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }
  section { padding: 55px 0; }
  .section-head h2,
  .product h3 { font-size: 28px; }
  .slide img { height: 240px; }
  .carousel-nav { top: 100px; }
}