:root {
  color-scheme: dark;
  --ink: #f7fbfb;
  --muted: #aab8b7;
  --line: rgba(255, 255, 255, 0.14);
  --panel: #111817;
  --panel-2: #e9f0ed;
  --charcoal: #080d0d;
  --green: #66d2b8;
  --steel: #96b8c5;
  --amber: #d7a441;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--charcoal);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

a {
  color: inherit;
}

.site-header {
  position: fixed;
  z-index: 10;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 20px clamp(20px, 5vw, 64px);
  background: rgba(8, 13, 13, 0.74);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
  text-decoration: none;
}

.brand-mark {
  width: 18px;
  height: 18px;
  background:
    linear-gradient(135deg, transparent 0 38%, var(--green) 39% 61%, transparent 62%),
    linear-gradient(45deg, transparent 0 38%, var(--steel) 39% 61%, transparent 62%);
  border: 1px solid rgba(255, 255, 255, 0.44);
  transform: rotate(45deg);
}

nav {
  display: flex;
  gap: clamp(14px, 3vw, 28px);
  color: var(--muted);
  font-size: 14px;
}

nav a {
  text-decoration: none;
}

nav a:hover,
footer a:hover {
  color: var(--green);
}

.hero {
  position: relative;
  min-height: 88vh;
  display: grid;
  align-items: center;
  overflow: hidden;
  padding: 120px clamp(20px, 5vw, 72px) 70px;
}

.hero-image,
.hero-overlay {
  position: absolute;
  inset: 0;
}

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  background:
    linear-gradient(90deg, rgba(8, 13, 13, 0.96) 0%, rgba(8, 13, 13, 0.78) 38%, rgba(8, 13, 13, 0.18) 72%),
    linear-gradient(180deg, rgba(8, 13, 13, 0.12), rgba(8, 13, 13, 0.78));
}

.hero-content {
  position: relative;
  max-width: 740px;
}

.eyebrow,
.section-label {
  margin: 0 0 14px;
  color: var(--green);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  max-width: 820px;
  margin-bottom: 24px;
  font-size: clamp(42px, 7vw, 86px);
  line-height: 0.98;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(30px, 4.8vw, 58px);
  line-height: 1.04;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 12px;
  font-size: 21px;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 590px;
  margin-bottom: 34px;
  color: #d7e3e1;
  font-size: clamp(17px, 2vw, 21px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-weight: 750;
  text-decoration: none;
}

.button.primary {
  background: var(--ink);
  color: var(--charcoal);
  border-color: var(--ink);
}

.button.secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--ink);
}

.intro,
.band,
.split,
.quality,
.contact {
  padding: clamp(56px, 9vw, 112px) clamp(20px, 5vw, 72px);
}

.intro {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(280px, 0.75fr);
  gap: clamp(28px, 6vw, 80px);
  background: var(--panel-2);
  color: #0d1514;
}

.intro p:last-child {
  align-self: end;
  margin: 0;
  color: #31403e;
  font-size: 18px;
}

.band {
  background: #0d1514;
}

.section-head {
  max-width: 760px;
  margin-bottom: 34px;
}

.material-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.material-grid article {
  min-height: 260px;
  padding: 28px;
  background: var(--panel);
}

.material-grid span {
  display: inline-block;
  margin-bottom: 42px;
  color: var(--amber);
  font-weight: 800;
}

.material-grid p,
.split p,
.quality span,
.contact p {
  color: var(--muted);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(300px, 0.9fr);
  gap: clamp(32px, 7vw, 88px);
  background: #f8faf8;
  color: #0c1312;
}

.application-list {
  display: grid;
  gap: 10px;
  align-content: start;
}

.application-list p {
  margin: 0;
  padding: 17px 0;
  border-bottom: 1px solid rgba(12, 19, 18, 0.16);
  color: #1e2d2b;
  font-size: 20px;
}

.quality {
  background: #101010;
}

.quality-copy {
  max-width: 860px;
}

.metric-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 34px;
  background: var(--line);
  border: 1px solid var(--line);
}

.metric-row div {
  min-height: 148px;
  padding: 24px;
  background: #141b1a;
}

.metric-row strong,
.metric-row span {
  display: block;
}

.metric-row strong {
  margin-bottom: 12px;
  font-size: 23px;
}

.contact {
  background: var(--panel-2);
  color: #0d1514;
}

.contact p {
  max-width: 760px;
  color: #31403e;
  font-size: 19px;
}

.contact a {
  color: #0f6d5e;
  font-weight: 800;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 28px clamp(20px, 5vw, 72px);
  border-top: 1px solid var(--line);
  color: var(--muted);
}

footer span {
  color: var(--ink);
  font-weight: 800;
}

footer a {
  text-decoration: none;
}

@media (max-width: 820px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    padding-block: 16px;
  }

  .hero {
    min-height: 92vh;
    padding-top: 152px;
  }

  .hero-overlay {
    background:
      linear-gradient(180deg, rgba(8, 13, 13, 0.92) 0%, rgba(8, 13, 13, 0.76) 56%, rgba(8, 13, 13, 0.74) 100%);
  }

  .intro,
  .split,
  .material-grid,
  .metric-row {
    grid-template-columns: 1fr;
  }

  .material-grid article,
  .metric-row div {
    min-height: auto;
  }

  footer {
    flex-direction: column;
  }
}