:root {
  --ink: #1b1f24;
  --muted: #5d6975;
  --paper: #ffffff;
  --wash: #f4f1eb;
  --steel: #2f3a42;
  --steel-2: #53616a;
  --copper: #b45f33;
  --copper-2: #d28a54;
  --mint: #1f7a68;
  --amber: #d59f2f;
  --line: #d9d2c5;
  --line-dark: rgba(255, 255, 255, 0.22);
  --shadow: 0 18px 45px rgba(40, 31, 20, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--wash);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  line-height: 1.55;
}

a {
  color: inherit;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 20;
  width: 100%;
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(20, 23, 26, 0.78);
  color: #fff;
  backdrop-filter: blur(18px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: min(1180px, calc(100% - 40px));
  min-height: 66px;
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 8px;
  background: linear-gradient(135deg, var(--copper), var(--steel));
  font-weight: 800;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.05;
}

.brand-text strong {
  font-size: 15px;
}

.brand-text span {
  color: rgba(255, 255, 255, 0.68);
  font-size: 12px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 14px;
}

.nav-links a {
  text-decoration: none;
}

.nav-links a:hover {
  color: #fff;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: var(--copper);
  color: #fff;
  font-weight: 750;
  text-decoration: none;
}

.button.secondary {
  border-color: rgba(255, 255, 255, 0.34);
  background: rgba(255, 255, 255, 0.12);
}

.hero {
  position: relative;
  display: grid;
  min-height: 82vh;
  padding: 132px 0 64px;
  color: #fff;
  isolation: isolate;
}

.hero::before {
  position: absolute;
  inset: 0;
  z-index: -2;
  background: url("assets/ingot-casting.jpg") center / cover no-repeat;
  content: "";
}

.hero::after {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(90deg, rgba(16, 18, 20, 0.92) 0%, rgba(16, 18, 20, 0.72) 48%, rgba(16, 18, 20, 0.24) 100%),
    linear-gradient(180deg, rgba(16, 18, 20, 0.25), rgba(16, 18, 20, 0.72));
  content: "";
}

.hero-inner {
  width: min(1180px, calc(100% - 40px));
  margin: auto;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  color: #f5d9bd;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.eyebrow::before {
  display: block;
  width: 34px;
  height: 2px;
  background: var(--copper-2);
  content: "";
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 760px;
  margin-bottom: 22px;
  font-size: clamp(44px, 6.4vw, 88px);
  line-height: 0.96;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 690px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 20px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 32px 0 28px;
}

.trust-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  max-width: 780px;
  border: 1px solid var(--line-dark);
  background: var(--line-dark);
}

.trust-item {
  min-height: 86px;
  padding: 18px;
  background: rgba(11, 13, 15, 0.6);
}

.trust-item b {
  display: block;
  color: #fff;
  font-size: 14px;
}

.trust-item span {
  display: block;
  margin-top: 5px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 13px;
}

.band {
  padding: 72px 0;
}

.band.white {
  background: #fff;
}

.band.steel {
  background: var(--steel);
  color: #fff;
}

.section-inner {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 28px;
  margin-bottom: 28px;
}

.section-head h2 {
  max-width: 680px;
  margin-bottom: 0;
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.08;
}

.section-head p {
  max-width: 430px;
  margin-bottom: 0;
  color: var(--muted);
}

.steel .section-head p,
.steel .muted,
.steel .small-note {
  color: rgba(255, 255, 255, 0.72);
}

.grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.panel {
  min-height: 190px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  box-shadow: var(--shadow);
}

.panel h3 {
  margin-bottom: 10px;
  font-size: 19px;
}

.panel p {
  margin-bottom: 0;
  color: var(--muted);
}

.steel .panel {
  border-color: rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.08);
  box-shadow: none;
}

.steel .panel p {
  color: rgba(255, 255, 255, 0.74);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}

.data-table th,
.data-table td {
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.data-table th {
  background: #efe8dc;
  font-size: 13px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.data-table tr:last-child td {
  border-bottom: 0;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  margin: 0 6px 6px 0;
  padding: 0 10px;
  border: 1px solid rgba(31, 122, 104, 0.26);
  border-radius: 999px;
  background: rgba(31, 122, 104, 0.08);
  color: #155e50;
  font-size: 13px;
  font-weight: 700;
}

.notice {
  border-left: 5px solid var(--copper);
  padding: 20px 24px;
  border-radius: 8px;
  background: #fff8ef;
  color: #4b3323;
}

.notice strong {
  display: block;
  margin-bottom: 6px;
}

.split {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 34px;
  align-items: start;
}

.feature-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.feature-list li {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.feature-list strong {
  display: block;
  margin-bottom: 4px;
}

.feature-list span {
  color: var(--muted);
}

.product-board {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.product-line {
  min-height: 170px;
  padding: 20px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
}

.product-line span {
  display: inline-flex;
  margin-bottom: 14px;
  padding: 5px 8px;
  border-radius: 6px;
  background: rgba(210, 138, 84, 0.18);
  color: #ffd9bd;
  font-size: 12px;
  font-weight: 800;
}

.product-line h3 {
  margin-bottom: 8px;
  font-size: 18px;
}

.product-line p {
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.72);
}

.check-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.check {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.check b {
  display: block;
  margin-bottom: 4px;
}

.check span {
  color: var(--muted);
}

.page-hero {
  padding: 138px 0 58px;
  background: var(--steel);
  color: #fff;
}

.page-hero h1 {
  max-width: 880px;
  margin-bottom: 16px;
  font-size: clamp(40px, 6vw, 72px);
}

.page-hero p {
  max-width: 760px;
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.78);
  font-size: 18px;
}

.content {
  padding: 56px 0 84px;
  background: #fff;
}

.prose {
  width: min(860px, calc(100% - 40px));
  margin: 0 auto;
}

.prose h2 {
  margin: 34px 0 10px;
  font-size: 28px;
}

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

.prose li {
  margin-bottom: 8px;
}

.small-note {
  color: var(--muted);
  font-size: 13px;
}

.site-footer {
  padding: 34px 0;
  background: #171a1d;
  color: rgba(255, 255, 255, 0.76);
}

.footer-inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.footer-inner a {
  color: #fff;
}

@media (max-width: 980px) {
  .grid,
  .product-board,
  .trust-row,
  .split,
  .check-grid {
    grid-template-columns: 1fr;
  }

  .section-head,
  .footer-inner {
    display: block;
  }

  .nav {
    width: min(100% - 28px, 1180px);
  }

  .nav-links {
    display: none;
  }

  .hero {
    min-height: auto;
    padding: 118px 0 46px;
  }

  .hero-copy {
    font-size: 18px;
  }

  .band {
    padding: 52px 0;
  }

  .data-table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }
}