:root {
  --ink: #101820;
  --muted: #66717d;
  --paper: #ffffff;
  --soft: #f3f6f8;
  --line: #dbe3e8;
  --red: #e01822;
  --blue: #143d59;
  --cyan: #2f7b8f;
  --green: #4c7766;
  --gold: #b98b3a;
  --deep: #071119;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Arial, "Helvetica Neue", sans-serif;
  line-height: 1.55;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  min-height: 78px;
  padding: 12px clamp(22px, 4vw, 64px);
  background: #fff;
  border-bottom: 1px solid rgba(16, 24, 32, 0.1);
}

.brand {
  display: inline-flex;
  align-items: center;
  background: #fff;
}

.brand img {
  display: block;
  width: 210px;
  max-width: 42vw;
  height: auto;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  color: #1c2732;
  font-size: 18px;
  font-weight: 800;
  white-space: nowrap;
}

.site-nav a,
.nav-dropdown-toggle {
  display: inline-flex;
  padding: 9px 0;
  border-bottom: 2px solid transparent;
}

.site-nav a:hover,
.nav-dropdown:hover .nav-dropdown-toggle,
.nav-dropdown.open .nav-dropdown-toggle {
  border-bottom-color: var(--red);
}

.nav-dropdown {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.nav-dropdown-toggle {
  appearance: none;
  border-top: 0;
  border-right: 0;
  border-left: 0;
  background: transparent;
  color: inherit;
  cursor: pointer;
  font: inherit;
  font-weight: 800;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  min-width: 250px;
  transform: translateX(-50%) translateY(8px);
  display: grid;
  gap: 0;
  padding: 10px;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: 0 18px 38px rgba(16, 24, 32, 0.14);
  opacity: 0;
  pointer-events: none;
  transition: opacity 160ms ease, transform 160ms ease;
}

.dropdown-menu a {
  padding: 11px 12px;
  border-bottom: 0;
  color: var(--ink);
  font-size: 15px;
}

.dropdown-menu a:hover {
  background: var(--soft);
  border-bottom: 0;
}

.nav-dropdown:hover .dropdown-menu,
.nav-dropdown:focus-within .dropdown-menu,
.nav-dropdown.open .dropdown-menu {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.hero {
  position: relative;
  min-height: calc(100vh - 78px);
  display: grid;
  align-items: center;
  overflow: hidden;
}

.hero-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-shade {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(6, 14, 22, 0.78), rgba(6, 14, 22, 0.48) 54%, rgba(6, 14, 22, 0.12)),
    linear-gradient(180deg, rgba(6, 14, 22, 0.04), rgba(6, 14, 22, 0.24));
}

.hero-grid {
  position: relative;
  width: min(1220px, calc(100% - 44px));
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  gap: 48px;
  align-items: end;
  padding: 78px 0;
  color: #fff;
}

.hero-copy {
  max-width: 790px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--gold);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  font-size: clamp(38px, 4.3vw, 58px);
  line-height: 1.04;
  letter-spacing: 0;
}

.hero-copy p:not(.eyebrow) {
  max-width: 690px;
  margin: 26px 0 0;
  color: rgba(255, 255, 255, 0.86);
  font-size: 19px;
  text-transform: capitalize;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 36px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid rgba(255, 255, 255, 0.55);
  font-size: 14px;
  font-weight: 900;
}

.button.primary {
  background: var(--red);
  border-color: var(--red);
  color: #fff;
}

.button.secondary {
  color: #fff;
}

.signal-panel {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 14px 16px;
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.09);
  backdrop-filter: blur(10px);
}

.signal-panel span {
  color: var(--gold);
  font-size: 12px;
  font-weight: 900;
}

.signal-panel strong {
  font-size: 15px;
  line-height: 1.25;
}

.signal-panel a {
  transition: color 160ms ease;
}

.signal-panel a:hover {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.section {
  padding: clamp(72px, 9vw, 122px) clamp(22px, 5vw, 76px);
}

.section-title {
  width: min(1120px, 100%);
  margin: 0 auto 40px;
}

.section-title.wide {
  width: min(1220px, 100%);
}

.section-title h2 {
  margin: 0;
  max-width: 760px;
  font-size: clamp(24px, 2.9vw, 38px);
  line-height: 1.15;
  letter-spacing: 0;
  text-transform: capitalize;
}

.company-layout {
  width: min(1120px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  gap: 54px;
}

.prose p {
  margin: 0 0 20px;
  color: #2d3843;
  font-size: 18px;
  text-transform: capitalize;
}

.greetings-section {
  background: #fff;
  border-top: 1px solid var(--line);
}

.greetings-copy {
  width: min(980px, 100%);
  margin: 0 auto;
  padding-left: clamp(18px, 3vw, 34px);
  border-left: 3px solid var(--red);
}

.greetings-copy p {
  margin: 0 0 20px;
  color: #2d3843;
  font-size: 19px;
}

.facts {
  margin: 0;
  border-top: 2px solid var(--blue);
}

.facts div {
  display: grid;
  grid-template-columns: 116px 1fr;
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.facts dt {
  color: var(--muted);
  font-weight: 900;
}

.facts dd {
  margin: 0;
  font-weight: 900;
}

.business-section {
  background: var(--soft);
}

.business-grid {
  width: min(1220px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-template-areas:
    "refractory battery"
    "semiconductor chemistry";
  gap: 18px;
}

.business-refractory {
  grid-area: refractory;
}

.business-battery {
  grid-area: battery;
}

.business-chemistry {
  grid-area: chemistry;
}

.business-semiconductor {
  grid-area: semiconductor;
}

.business-card {
  min-height: 420px;
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  background: #fff;
  border: 1px solid var(--line);
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.business-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 38px rgba(16, 24, 32, 0.12);
}

.business-card img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.business-battery img {
  object-position: 78% 50%;
}

.business-card div {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 28px;
}

.domain {
  display: block;
  margin-bottom: 10px;
  color: var(--red);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

.business-card h3 {
  margin: 0 0 16px;
  font-size: 30px;
  line-height: 1.08;
  text-transform: capitalize;
}

.business-card p {
  margin: 0;
  color: var(--muted);
  text-transform: capitalize;
}

.business-card a {
  width: max-content;
  margin-top: 22px;
  padding-bottom: 3px;
  border-bottom: 2px solid var(--red);
  color: var(--ink);
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
}

.library-section {
  background: var(--deep);
  color: #fff;
}

.library-layout {
  width: min(1220px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 36px;
}

.library-copy p {
  margin: 0;
  color: rgba(255, 255, 255, 0.76);
  font-size: 18px;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.download-grid a {
  min-height: 180px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 8px;
  padding: 22px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.06);
}

.download-grid span {
  color: var(--gold);
  font-size: 12px;
  font-weight: 900;
}

.download-grid strong {
  font-size: 22px;
  line-height: 1.1;
}

.download-grid small {
  color: rgba(255, 255, 255, 0.68);
  font-size: 13px;
}

.contact-section {
  background: var(--soft);
}

.contact-panel {
  width: min(1220px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 420px;
  gap: 44px;
  padding: clamp(32px, 5vw, 56px);
  background: #fff;
  border: 1px solid var(--line);
}

.contact-panel h2 {
  max-width: 720px;
  margin: 0;
  font-size: clamp(24px, 2.8vw, 36px);
  line-height: 1.15;
}

.contact-info {
  border-left: 2px solid var(--red);
  padding-left: 24px;
}

.contact-info h3 {
  margin: 0 0 12px;
  font-size: 22px;
}

.contact-info p {
  margin: 0 0 8px;
  color: var(--muted);
}

.contact-info a {
  color: var(--ink);
  font-weight: 900;
}

.email-form {
  display: grid;
  gap: 14px;
}

.email-form label {
  display: grid;
  gap: 6px;
  color: #3b4652;
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
}

.email-form input,
.email-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: #f8fafb;
  color: var(--ink);
  font: inherit;
  padding: 12px 13px;
}

.email-form textarea {
  resize: vertical;
}

.email-form button {
  width: max-content;
  min-height: 46px;
  border: 0;
  background: var(--red);
  color: #fff;
  cursor: pointer;
  font: inherit;
  font-weight: 900;
  padding: 0 22px;
}

.site-footer {
  display: grid;
  grid-template-columns: 0.75fr 1.35fr 0.9fr;
  gap: 28px;
  padding: 28px clamp(22px, 5vw, 76px);
  background: #fff;
  border-top: 1px solid var(--line);
  color: #4c5965;
  font-size: 13px;
}

.site-footer strong {
  display: block;
  margin-bottom: 6px;
  color: var(--ink);
  font-size: 14px;
}

.site-footer p {
  margin: 0;
}

.site-footer div:last-child {
  text-align: right;
}

.division-page .site-header {
  position: fixed;
  width: 100%;
}

.division-hero {
  position: relative;
  min-height: 100vh;
  display: grid;
  align-items: end;
  overflow: hidden;
  padding: 120px clamp(22px, 5vw, 76px) 72px;
}

.division-hero-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.division-hero-shade {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(6, 14, 22, 0.82), rgba(6, 14, 22, 0.48) 58%, rgba(6, 14, 22, 0.16)),
    linear-gradient(180deg, rgba(6, 14, 22, 0.08), rgba(6, 14, 22, 0.5));
}

.division-hero-content {
  position: relative;
  width: min(860px, 100%);
  color: #fff;
}

.division-hero h1 {
  margin: 0;
  font-size: clamp(42px, 5.6vw, 76px);
  line-height: 1.02;
  letter-spacing: 0;
  text-transform: capitalize;
}

.division-hero p:not(.eyebrow) {
  max-width: 720px;
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.86);
  font-size: 19px;
  text-transform: capitalize;
}

.division-intro {
  background: #fff;
}

.division-summary {
  width: min(1120px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 420px;
  gap: 52px;
  align-items: start;
}

.division-summary p {
  margin: 0;
  color: #2d3843;
  font-size: 19px;
  text-transform: capitalize;
}

.division-summary ul {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 2px solid var(--blue);
}

.division-summary li {
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-weight: 800;
  text-transform: capitalize;
}

@media (max-width: 1080px) {
  .business-grid,
  .download-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-grid {
    grid-template-columns: 1fr;
  }

  .signal-panel {
    max-width: 520px;
  }
}

@media (max-width: 860px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .site-nav {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .dropdown-menu {
    left: 0;
    transform: translateY(8px);
  }

  .nav-dropdown:hover .dropdown-menu,
  .nav-dropdown:focus-within .dropdown-menu,
  .nav-dropdown.open .dropdown-menu {
    transform: translateY(0);
  }

  .business-card,
  .company-layout,
  .library-layout,
  .contact-panel,
  .division-summary {
    grid-template-columns: 1fr;
  }

  .site-footer {
    grid-template-columns: 1fr;
  }

  .site-footer div:last-child {
    text-align: left;
  }
}

@media (max-width: 620px) {
  .business-grid,
  .download-grid {
    grid-template-columns: 1fr;
  }

  .business-grid {
    grid-template-areas:
      "refractory"
      "battery"
      "chemistry"
      "semiconductor";
  }

  .business-card {
    min-height: auto;
  }

  .hero h1 {
    font-size: 38px;
  }
}