@import url("https://fonts.googleapis.com/css2?family=Archivo:wdth,wght@90,400;90,500;95,600;95,700;100,800&family=IBM+Plex+Sans:wght@400;500;600;700&display=swap");

:root {
  --atk-blue: #0632a1;
  --atk-cyan: #04aee8;
  --electric: #21c7ff;
  --navy: #04101d;
  --navy-2: #071a2c;
  --graphite: #111820;
  --ink: #121722;
  --muted: #677386;
  --line: #ccd6e4;
  --paper: #ffffff;
  --technical: #edf2f7;
  --technical-2: #f6f8fb;
}

* {
  box-sizing: border-box;
}

html {
  overflow-x: hidden;
  scroll-behavior: smooth;
  background: var(--navy);
}

body {
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background: var(--paper);
  font-family: "IBM Plex Sans", Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

img {
  display: block;
  max-width: 100%;
}

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

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

p {
  color: var(--muted);
  line-height: 1.46;
}

h1,
h2,
h3,
.main-nav,
.eyebrow,
.mega-intro span,
.mega-intro a,
.text-link,
.cable-feature a,
.solution-panel span,
.resource-library span,
.ftth-layout span,
.contact-actions a,
.tech-word,
.cable-taxonomy span,
.engineering-grid span,
.paired-copy p {
  font-family: "Archivo", "IBM Plex Sans", Inter, sans-serif;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  font-weight: 800;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  min-height: 82px;
  padding: 16px clamp(18px, 4.8vw, 76px);
  color: rgba(255, 255, 255, 0.86);
  background: linear-gradient(180deg, rgba(4, 16, 29, 0.96), rgba(4, 16, 29, 0.62) 72%, transparent);
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
  backdrop-filter: blur(16px);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: clamp(13px, 1.45vw, 25px);
  font-size: 0.79rem;
  font-weight: 700;
}

.main-nav > a,
.nav-item > a {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}

.main-nav > a::after,
.nav-item > a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 8px;
  height: 2px;
  background: var(--atk-cyan);
  transition: right 180ms ease;
}

.main-nav a:hover {
  color: #ffffff;
}

.main-nav > a:hover::after,
.nav-item > a:hover::after {
  right: 0;
}

.nav-item {
  position: relative;
}

.mega-menu {
  position: absolute;
  top: calc(100% + 10px);
  left: -170px;
  display: grid;
  grid-template-columns: 260px minmax(430px, 620px);
  gap: 1px;
  width: min(900px, calc(100vw - 44px));
  pointer-events: none;
  opacity: 0;
  transform: translateY(8px);
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.42);
  transition: opacity 180ms ease, transform 180ms ease;
}

.has-mega:hover .mega-menu,
.has-mega:focus-within .mega-menu {
  pointer-events: auto;
  opacity: 1;
  transform: translateY(0);
}

.mega-intro,
.mega-family {
  background: #071423;
}

.mega-intro {
  padding: 28px;
  border-top: 5px solid var(--atk-cyan);
}

.mega-intro span {
  color: var(--atk-cyan);
  font-size: 0.78rem;
  font-weight: 800;
}

.mega-intro strong {
  display: block;
  margin: 14px 0 24px;
  color: #ffffff;
  font-size: 1.15rem;
  line-height: 1.22;
}

.mega-intro a,
.text-link,
.cable-feature a {
  color: var(--atk-cyan);
  font-size: 0.88rem;
  font-weight: 800;
}

.mega-family {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.mega-family a {
  display: grid;
  gap: 8px;
  min-height: 124px;
  padding: 22px;
  border-left: 1px solid rgba(255, 255, 255, 0.11);
  border-bottom: 1px solid rgba(255, 255, 255, 0.11);
}

.mega-family span {
  color: #ffffff;
  font-family: "Archivo", "IBM Plex Sans", sans-serif;
  font-size: 1.04rem;
  font-weight: 800;
  text-transform: uppercase;
}

.mega-family small {
  color: #aeb8c7;
  font-size: 0.85rem;
  line-height: 1.35;
}

.language {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: rgba(255, 255, 255, 0.78);
}

.language a[aria-current="true"] {
  color: #080b0f;
}

.language-option {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  color: rgba(255, 255, 255, 0.78);
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.16);
  transition: color 160ms ease, background 160ms ease, border-color 160ms ease;
}

.language-option:hover,
.language-option:focus-visible,
.language-option[aria-current="true"] {
  color: #080b0f;
  background: #fff000;
  border-color: #fff000;
  outline: 0;
}

.language-option.is-disabled {
  cursor: default;
  opacity: 0.48;
}

.language-option.is-disabled:hover,
.language-option.is-disabled:focus-visible {
  color: rgba(255, 255, 255, 0.78);
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(255, 255, 255, 0.16);
}

.language-icon {
  font-size: 0.68rem;
  font-weight: 800;
  line-height: 1;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.24);
  background: rgba(255, 255, 255, 0.08);
}

.nav-toggle span {
  width: 18px;
  height: 2px;
  background: #ffffff;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  align-items: center;
  min-height: 84vh;
  padding: clamp(118px, 13vh, 150px) clamp(20px, 6vw, 92px) clamp(52px, 6vw, 82px);
  overflow: hidden;
  color: #ffffff;
  background:
    linear-gradient(105deg, rgba(4, 16, 29, 1) 0%, rgba(4, 16, 29, 0.99) 45%, rgba(6, 50, 161, 0.36) 78%, rgba(4, 16, 29, 1) 100%),
    var(--navy);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 82px clamp(18px, 4.8vw, 76px) 28px;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.085) 1px, transparent 1px),
    linear-gradient(0deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 118px 118px;
  mask-image: linear-gradient(90deg, transparent, #000 15%, #000 84%, transparent);
  opacity: 0.44;
}

.hero::after {
  content: "ATK";
  position: absolute;
  right: clamp(18px, 5vw, 80px);
  bottom: clamp(38px, 7vw, 100px);
  color: rgba(255, 255, 255, 0.052);
  font-family: "Archivo", "IBM Plex Sans", sans-serif;
  font-size: min(24vw, 19rem);
  font-weight: 800;
  line-height: 0.75;
}

.hero-copy {
  position: relative;
  z-index: 1;
  max-width: 1040px;
}

h1 {
  max-width: 880px;
  margin-bottom: 24px;
  font-size: clamp(3.45rem, 5.55vw, 6.55rem);
  line-height: 0.93;
}

h1 span {
  display: block;
}

.hero-subnote {
  display: inline-flex;
  margin: 0;
  padding-top: 18px;
  color: rgba(255, 255, 255, 0.72);
  border-top: 3px solid var(--atk-cyan);
  font-family: "Archivo", "IBM Plex Sans", sans-serif;
  font-size: clamp(0.92rem, 1.15vw, 1.15rem);
  font-weight: 700;
  text-transform: uppercase;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--atk-cyan);
  font-size: 0.78rem;
  font-weight: 800;
}

h2 {
  max-width: 900px;
  margin-bottom: 0;
  font-size: clamp(2.35rem, 4.1vw, 5.35rem);
  line-height: 0.92;
}

.section {
  padding: clamp(72px, 7.4vw, 118px) clamp(20px, 6vw, 92px);
}

.section-head,
.split-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 30px;
  margin-bottom: 34px;
}

.solutions {
  background: var(--technical);
}

.solutions-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.9fr) minmax(0, 0.9fr);
  grid-auto-rows: minmax(190px, 18vw);
  gap: 1px;
  background: #c5d0df;
  border-top: 4px solid var(--atk-blue);
}

.solution-panel {
  position: relative;
  display: flex;
  align-items: end;
  min-height: 190px;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.94), rgba(237, 242, 247, 0.94)),
    var(--paper);
}

.solution-panel.solution-cables {
  grid-row: span 2;
  background: #07111e;
}

.solution-panel.wide {
  grid-column: span 2;
}

.solution-panel.dark {
  background: var(--navy-2);
}

.solution-panel::before {
  content: "";
  position: absolute;
  inset: 24px;
  border-top: 2px solid var(--atk-cyan);
  border-left: 2px solid rgba(6, 50, 161, 0.5);
}

.solution-panel::after {
  content: "";
  position: absolute;
  right: 24px;
  top: 24px;
  width: 42%;
  max-width: 220px;
  height: 6px;
  background: linear-gradient(90deg, var(--atk-blue), var(--atk-cyan));
}

.solution-panel.dark::before,
.solution-panel.solution-cables::before {
  border-left-color: rgba(255, 255, 255, 0.18);
}

.solution-panel span,
.ftth-layout span,
.resource-library span {
  position: relative;
  z-index: 1;
  width: 100%;
  color: #ffffff;
  background: transparent;
  font-weight: 800;
}

.solution-panel span {
  padding: 72px 28px 26px;
  color: var(--ink);
  font-size: clamp(1.65rem, 2.55vw, 3.05rem);
  line-height: 0.94;
}

.solution-panel.solution-cables span,
.solution-panel.dark span {
  color: #ffffff;
}

.cables {
  color: #ffffff;
  background:
    linear-gradient(135deg, rgba(4, 16, 29, 0.99), rgba(17, 24, 32, 0.98) 62%, rgba(6, 50, 161, 0.35)),
    var(--navy);
}

.cables h2,
.cables .split-head,
.cables p {
  color: #ffffff;
}

.cable-stage {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 1px;
  background: rgba(255, 255, 255, 0.14);
  border-top: 4px solid var(--atk-cyan);
}

.cable-feature {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 300px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.055);
}

.cable-feature::after {
  content: "";
  align-self: end;
  height: 5px;
  margin: 0 clamp(22px, 3.2vw, 42px) clamp(22px, 3.2vw, 42px);
  background: linear-gradient(90deg, var(--atk-blue), var(--atk-cyan));
}

.cable-feature > div {
  display: flex;
  flex-direction: column;
  justify-content: end;
  gap: 16px;
  padding: clamp(22px, 3.2vw, 42px);
}

.tech-word {
  display: block;
  color: #ffffff;
  font-size: clamp(3.8rem, 7.2vw, 7.65rem);
  font-weight: 800;
  line-height: 0.82;
}

.cable-feature p {
  margin: 0;
  color: rgba(255, 255, 255, 0.74);
  font-size: 1.05rem;
  font-weight: 700;
}

.cable-feature.asu {
  grid-template-columns: 1fr;
}

.cable-feature.asu > div {
  min-height: auto;
}

.cable-taxonomy {
  display: flex;
  flex-wrap: wrap;
  gap: 1px;
  margin-top: 1px;
  background: rgba(255, 255, 255, 0.12);
}

.cable-taxonomy span {
  flex: 1 1 180px;
  min-height: 64px;
  padding: 20px;
  color: #ffffff;
  background: rgba(255, 255, 255, 0.055);
  font-size: 1rem;
  font-weight: 800;
}

.ftth {
  background: #ffffff;
}

.ftth .section-head {
  align-items: center;
}

.ftth-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.54fr) minmax(0, 0.46fr);
  gap: 1px;
  background: var(--line);
  border-top: 4px solid var(--atk-blue);
}

.ftth-main,
.ftth-stack article {
  position: relative;
  display: flex;
  align-items: end;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(237, 242, 247, 0.98)),
    var(--technical-2);
}

.ftth-main {
  min-height: 320px;
}

.ftth-stack {
  display: grid;
  gap: 1px;
}

.ftth-stack article {
  min-height: 106px;
}

.ftth-main::before,
.ftth-stack article::before {
  content: "";
  position: absolute;
  inset: 22px;
  border-top: 2px solid var(--atk-blue);
  border-left: 2px solid var(--atk-cyan);
}

.ftth-layout span {
  padding: 62px 22px 20px;
  color: var(--ink);
  font-size: clamp(1.15rem, 1.55vw, 1.8rem);
}

.paired-products {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  padding: 0;
  background: #c5d0df;
}

.paired-products article {
  display: grid;
  min-width: 0;
  background: var(--technical);
}

.paired-products .equipment {
  color: #ffffff;
  background: var(--navy);
}

.paired-copy {
  position: relative;
  min-height: 360px;
  padding: clamp(42px, 5.5vw, 78px) clamp(20px, 6vw, 92px);
}

.paired-copy::after {
  content: "";
  position: absolute;
  left: clamp(20px, 6vw, 92px);
  right: clamp(20px, 6vw, 92px);
  bottom: clamp(34px, 5vw, 62px);
  height: 5px;
  background: linear-gradient(90deg, var(--atk-blue), var(--atk-cyan));
}

.paired-copy p {
  max-width: 560px;
  margin: 20px 0 0;
  font-size: 1rem;
  font-weight: 700;
}

.equipment h2,
.equipment p {
  color: #ffffff;
}

.engineering {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(280px, 0.58fr);
  gap: clamp(30px, 5vw, 70px);
  align-items: end;
  color: #ffffff;
  background:
    linear-gradient(130deg, rgba(4, 16, 29, 0.99), rgba(6, 50, 161, 0.48)),
    var(--navy);
}

.engineering h2,
.engineering p {
  color: #ffffff;
}

.engineering p {
  max-width: 460px;
  margin: 20px 0 28px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 1.05rem;
}

.engineering-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(255, 255, 255, 0.13);
  border-top: 4px solid var(--atk-cyan);
}

.engineering-grid span {
  min-height: 110px;
  padding: 22px;
  color: #ffffff;
  background: rgba(255, 255, 255, 0.06);
  font-size: 1.06rem;
  font-weight: 800;
}

.manufacturing {
  display: grid;
  align-items: center;
  background: var(--technical);
  border-top: 4px solid var(--atk-blue);
}

.manufacturing p {
  max-width: 520px;
  margin: 18px 0 0;
  font-size: 1.1rem;
}

.resources {
  color: #ffffff;
  background: var(--graphite);
}

.resources h2 {
  color: #ffffff;
}

.resource-library {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) repeat(3, minmax(0, 0.74fr));
  grid-auto-rows: minmax(140px, 15vw);
  gap: 1px;
  background: rgba(255, 255, 255, 0.14);
  border-top: 4px solid var(--atk-cyan);
}

.resource-library a,
.resource-library > div {
  position: relative;
  display: flex;
  align-items: end;
  overflow: hidden;
  background: #ffffff;
}

.resource-library .resource-main {
  background: #071423;
}

.resource-library a::before,
.resource-library > div::before {
  content: "";
  position: absolute;
  inset: 20px;
  border-top: 2px solid var(--atk-cyan);
  border-left: 2px solid rgba(6, 50, 161, 0.45);
}

.resource-library span {
  padding: 58px 20px 20px;
  color: var(--ink);
  font-size: clamp(1.12rem, 1.55vw, 1.75rem);
}

.resource-library .resource-main span {
  color: #ffffff;
}

.contact {
  display: grid;
  grid-template-columns: minmax(240px, 0.35fr) minmax(260px, 0.3fr) minmax(280px, 0.35fr);
  gap: clamp(28px, 4vw, 56px);
  color: #ffffff;
  background: var(--navy);
  border-top: 6px solid var(--atk-blue);
}

.contact .eyebrow,
.contact h2,
.contact p,
.contact a,
.contact span {
  color: #ffffff;
}

.contact-actions {
  display: grid;
  gap: 1px;
  align-self: center;
  background: rgba(5, 167, 223, 0.44);
  border: 1px solid rgba(5, 167, 223, 0.44);
}

.contact-actions a {
  min-height: 56px;
  padding: 16px;
  background: rgba(255, 255, 255, 0.08);
}

address {
  display: grid;
  gap: 12px;
  align-self: center;
  font-style: normal;
  line-height: 1.5;
}

address a,
address span {
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 26px clamp(20px, 6vw, 90px);
  color: #aeb8c7;
  background: var(--navy);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

@media (max-width: 1180px) {
  .solutions-grid,
  .resource-library {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .solution-panel.solution-cables,
  .resource-library .resource-main {
    grid-row: span 1;
  }

  .solution-panel.wide {
    grid-column: span 1;
  }

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

@media (max-width: 980px) {
  .nav-toggle {
    display: inline-flex;
  }

  .main-nav {
    position: absolute;
    inset: 78px 0 auto 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 20px 20px;
    background: rgba(4, 16, 29, 0.99);
    border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  }

  .main-nav.open {
    display: flex;
  }

  .main-nav > a,
  .nav-item > a,
  .language {
    min-height: 48px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  }

  .mega-menu {
    position: static;
    display: grid;
    width: 100%;
    grid-template-columns: 1fr;
    max-height: 0;
    overflow: hidden;
    pointer-events: auto;
    opacity: 1;
    transform: none;
    border: 0;
    box-shadow: none;
    transition: max-height 180ms ease;
  }

  .main-nav.open .mega-menu {
    max-height: 650px;
    border: 1px solid rgba(255, 255, 255, 0.14);
  }

  .mega-family,
  .hero,
  .cable-stage,
  .ftth-layout,
  .paired-products,
  .engineering,
  .manufacturing {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .cable-feature,
  .cable-feature.asu {
    grid-template-columns: 1fr;
  }

  .section-head,
  .split-head {
    display: grid;
    align-items: start;
  }

  .ftth-main {
    min-height: 520px;
  }
}

@media (max-width: 620px) {
  .site-header {
    min-height: 70px;
    padding-inline: 16px;
  }

  .main-nav {
    inset: 70px 0 auto 0;
  }

  h1 {
    font-size: clamp(2rem, 8.9vw, 2.16rem);
    line-height: 0.96;
  }

  h2 {
    font-size: 2.65rem;
  }

  .hero {
    gap: 12px;
    padding: 104px 18px 46px;
  }

  .hero::before {
    inset: 70px 18px 24px;
    background-size: 72px 72px;
  }

  .hero::after {
    right: 18px;
    bottom: 28px;
    font-size: 7.6rem;
  }

  .hero-subnote {
    padding-top: 14px;
    font-size: 0.88rem;
  }

  .section {
    padding: 58px 18px;
  }

  .solutions-grid,
  .resource-library,
  .engineering-grid {
    grid-template-columns: 1fr;
  }

  .solutions-grid,
  .resource-library {
    grid-auto-rows: auto;
  }

  .solution-panel {
    min-height: 154px;
  }

  .solution-panel span {
    min-height: 0;
    padding: 62px 18px 20px;
    font-size: 1.8rem;
  }

  .cable-feature {
    min-height: 210px;
  }

  .cable-feature > div,
  .cable-feature.asu > div {
    min-height: 160px;
  }

  .tech-word {
    font-size: 4.25rem;
  }

  .cable-taxonomy span {
    flex-basis: calc(50% - 1px);
    min-height: 58px;
    font-size: 0.86rem;
  }

  .ftth-main,
  .ftth-stack article {
    min-height: 132px;
  }

  .paired-copy {
    padding: 50px 18px 24px;
  }

  .resource-library a,
  .resource-library > div {
    min-height: 118px;
  }

  .site-footer {
    flex-direction: column;
  }
}

/* Visual identity refine: no product imagery, industrial editorial system. */
:root {
  --charcoal: #090d12;
  --carbon: #0d1218;
  --steel: #9aa5b3;
  --metal: #c8ced6;
  --offwhite: #f2f4f6;
  --warmwhite: #fafafa;
  --panel: #161d25;
}

body {
  background: var(--charcoal);
}

h1,
h2,
h3,
.main-nav,
.eyebrow,
.mega-intro span,
.mega-intro a,
.text-link,
.cable-feature a,
.solution-panel span,
.resource-library span,
.ftth-layout span,
.contact-actions a,
.tech-word,
.cable-taxonomy span,
.engineering-grid span,
.paired-copy p {
  font-stretch: 95%;
}

.site-header {
  min-height: 78px;
  background: linear-gradient(180deg, rgba(9, 13, 18, 0.96), rgba(9, 13, 18, 0.72) 74%, rgba(9, 13, 18, 0));
  border-bottom-color: rgba(200, 206, 214, 0.13);
}

.main-nav {
  gap: clamp(14px, 1.6vw, 28px);
  font-size: 0.76rem;
}

.hero {
  min-height: 88vh;
  padding-top: clamp(128px, 15vh, 168px);
  background:
    linear-gradient(90deg, rgba(4, 174, 232, 0.11) 0 1px, transparent 1px),
    linear-gradient(0deg, rgba(255, 255, 255, 0.045) 0 1px, transparent 1px),
    linear-gradient(112deg, #090d12 0%, #101923 48%, #071f43 100%);
  background-size: 148px 148px, 148px 148px, auto;
}

.hero::before {
  inset: 78px clamp(20px, 6vw, 92px) 44px;
  background:
    linear-gradient(90deg, transparent 0 17%, rgba(4, 174, 232, 0.75) 17% 17.7%, transparent 17.7%),
    linear-gradient(90deg, transparent 0 48%, rgba(255, 255, 255, 0.12) 48% 48.25%, transparent 48.25%),
    linear-gradient(0deg, transparent 0 66%, rgba(200, 206, 214, 0.16) 66% 66.4%, transparent 66.4%);
  background-size: 100% 100%;
  border-left: 1px solid rgba(200, 206, 214, 0.22);
  border-bottom: 1px solid rgba(4, 174, 232, 0.38);
  mask-image: none;
  opacity: 1;
}

.hero::after {
  content: "ATK";
  right: clamp(20px, 7vw, 110px);
  bottom: clamp(56px, 10vw, 128px);
  color: rgba(200, 206, 214, 0.07);
  font-size: min(22vw, 17rem);
}

.hero-copy::after {
  content: "";
  display: block;
  width: min(48vw, 620px);
  height: 6px;
  margin-top: clamp(52px, 8vw, 110px);
  background: linear-gradient(90deg, var(--atk-cyan), var(--atk-blue), transparent);
}

h1 {
  max-width: 980px;
  font-size: clamp(3.65rem, 6.15vw, 7.15rem);
  line-height: 0.9;
}

h2 {
  font-size: clamp(2.15rem, 3.7vw, 4.9rem);
  line-height: 0.9;
}

.hero-subnote,
.text-link,
.cable-feature a {
  color: var(--atk-cyan);
}

.section {
  position: relative;
}

.section::before {
  content: "";
  position: absolute;
  left: clamp(20px, 6vw, 92px);
  top: clamp(28px, 4vw, 56px);
  width: 10px;
  height: 3px;
  background: var(--atk-cyan);
}

.solutions,
.ftth,
.manufacturing {
  background:
    linear-gradient(90deg, rgba(6, 50, 161, 0.04) 0 1px, transparent 1px),
    var(--offwhite);
  background-size: 110px 110px, auto;
}

.solutions-grid {
  grid-auto-rows: minmax(210px, 19vw);
  background: rgba(9, 13, 18, 0.16);
  border-top-color: var(--charcoal);
}

.solution-panel {
  background:
    linear-gradient(135deg, rgba(250, 250, 250, 0.96), rgba(224, 229, 235, 0.84)),
    var(--warmwhite);
}

.solution-panel.solution-cables,
.solution-panel.dark {
  background:
    linear-gradient(135deg, rgba(9, 13, 18, 0.98), rgba(16, 25, 35, 0.98)),
    var(--carbon);
}

.solution-panel::before,
.ftth-main::before,
.ftth-stack article::before,
.resource-library a::before,
.resource-library > div::before {
  inset: 22px;
  border-top: 2px solid var(--atk-cyan);
  border-left: 1px solid rgba(154, 165, 179, 0.5);
}

.solution-panel::after {
  right: 24px;
  top: 25px;
  height: 4px;
  background: linear-gradient(90deg, var(--atk-blue), var(--atk-cyan));
}

.solution-panel span {
  padding: 84px 28px 28px;
  font-size: clamp(1.55rem, 2.35vw, 2.85rem);
}

.cables {
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 0 1px, transparent 1px),
    linear-gradient(132deg, #0a0f15, #121b25 58%, #061b3a);
  background-size: 120px 120px, auto;
}

.cable-stage {
  border-top-color: var(--atk-cyan);
  background: rgba(200, 206, 214, 0.18);
}

.cable-feature {
  min-height: 320px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.06), rgba(154, 165, 179, 0.09)),
    var(--panel);
}

.cable-feature::before {
  content: "";
  width: 86px;
  height: 86px;
  margin: 34px 34px 0 auto;
  border: 1px solid rgba(4, 174, 232, 0.55);
  border-radius: 50%;
  background:
    linear-gradient(90deg, transparent 48%, rgba(4, 174, 232, 0.55) 49% 51%, transparent 52%),
    linear-gradient(0deg, transparent 48%, rgba(4, 174, 232, 0.55) 49% 51%, transparent 52%);
  opacity: 0.42;
}

.tech-word {
  color: #f8fafc;
  font-size: clamp(4rem, 7.6vw, 8.2rem);
}

.cable-feature p,
.paired-copy p {
  color: rgba(248, 250, 252, 0.74);
}

.cable-taxonomy span {
  background: rgba(255, 255, 255, 0.065);
}

.ftth {
  background:
    linear-gradient(90deg, rgba(9, 13, 18, 0.04) 0 1px, transparent 1px),
    var(--warmwhite);
  background-size: 120px 120px, auto;
}

.ftth-layout {
  background: rgba(9, 13, 18, 0.14);
  border-top-color: var(--atk-blue);
}

.ftth-main,
.ftth-stack article {
  background:
    linear-gradient(135deg, rgba(250, 250, 250, 0.98), rgba(229, 233, 238, 0.92)),
    var(--offwhite);
}

.ftth-main {
  min-height: 360px;
}

.ftth-stack article {
  min-height: 120px;
}

.paired-products {
  background: rgba(9, 13, 18, 0.16);
}

.paired-products article {
  background:
    linear-gradient(135deg, #e8edf2, #f7f8f9);
}

.paired-products .equipment {
  background:
    linear-gradient(135deg, #090d12, #111c28),
    var(--carbon);
}

.paired-copy {
  min-height: 340px;
}

.paired-copy h2 {
  max-width: 560px;
}

.paired-products article:not(.equipment) .paired-copy p {
  color: #4f5b69;
}

.engineering {
  min-height: 520px;
  background:
    linear-gradient(90deg, rgba(4, 174, 232, 0.08) 0 1px, transparent 1px),
    linear-gradient(128deg, #090d12 0%, #07192d 57%, #062c7a 100%);
  background-size: 118px 118px, auto;
}

.engineering::after {
  content: "";
  position: absolute;
  right: clamp(20px, 6vw, 92px);
  top: clamp(54px, 7vw, 108px);
  width: min(28vw, 360px);
  aspect-ratio: 1;
  border: 1px solid rgba(4, 174, 232, 0.35);
  border-radius: 50%;
  background:
    linear-gradient(90deg, transparent 49%, rgba(4, 174, 232, 0.22) 49.5% 50.5%, transparent 51%),
    linear-gradient(0deg, transparent 49%, rgba(4, 174, 232, 0.18) 49.5% 50.5%, transparent 51%);
  opacity: 0.42;
}

.engineering > * {
  position: relative;
  z-index: 1;
}

.engineering-grid {
  background: rgba(200, 206, 214, 0.18);
}

.engineering-grid span {
  background: rgba(255, 255, 255, 0.075);
}

.manufacturing {
  min-height: 360px;
  background:
    linear-gradient(90deg, rgba(9, 13, 18, 0.05) 0 1px, transparent 1px),
    linear-gradient(135deg, #e7ebef, #fafafa);
  background-size: 128px 128px, auto;
  border-top-color: var(--steel);
}

.manufacturing h2 {
  max-width: 760px;
}

.resources {
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 0 1px, transparent 1px),
    #111820;
  background-size: 118px 118px, auto;
}

.resource-library {
  grid-auto-rows: minmax(155px, 16vw);
  background: rgba(200, 206, 214, 0.18);
}

.resource-library a,
.resource-library > div {
  background: #f7f8fa;
}

.resource-library .resource-main {
  background: #07111d;
}

.contact {
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 0 1px, transparent 1px),
    var(--charcoal);
  background-size: 120px 120px, auto;
}

.contact-actions a {
  background: rgba(4, 174, 232, 0.15);
}

@media (max-width: 980px) {
  .hero {
    min-height: 64vh;
    padding-top: 112px;
  }

  .engineering::after {
    width: 220px;
    top: 80px;
    opacity: 0.2;
  }
}

@media (max-width: 620px) {
  .site-header {
    min-height: 72px;
    background: rgba(9, 13, 18, 0.96);
  }

  .nav-toggle {
    border-color: rgba(200, 206, 214, 0.35);
    background: rgba(255, 255, 255, 0.05);
  }

  .hero {
    min-height: 430px;
    padding: 104px 18px 44px;
  }

  .hero::before {
    inset: 72px 18px 24px;
    background:
      linear-gradient(90deg, transparent 0 31%, rgba(4, 174, 232, 0.6) 31% 32%, transparent 32%),
      linear-gradient(0deg, transparent 0 70%, rgba(200, 206, 214, 0.16) 70% 70.8%, transparent 70.8%);
  }

  .hero::after {
    right: 12px;
    bottom: 132px;
    font-size: 6.8rem;
  }

  .hero-copy::after {
    width: 100%;
    margin-top: 42px;
  }

  h1 {
    font-size: clamp(2.08rem, 9.6vw, 2.35rem);
    line-height: 0.94;
  }

  h2 {
    font-size: clamp(2.15rem, 10.5vw, 2.8rem);
  }

  .section {
    padding: 62px 18px;
  }

  .solutions-grid {
    gap: 8px;
    background: transparent;
    border-top: 0;
  }

  .solution-panel {
    min-height: 138px;
  }

  .solution-panel span {
    padding: 60px 18px 18px;
    font-size: 1.48rem;
  }

  .cable-stage,
  .ftth-layout,
  .engineering-grid,
  .resource-library {
    gap: 8px;
    background: transparent;
  }

  .cable-feature {
    min-height: 230px;
  }

  .tech-word {
    font-size: 4.55rem;
  }

  .ftth-main,
  .ftth-stack article {
    min-height: 122px;
  }

  .paired-copy {
    min-height: 235px;
  }

  .engineering {
    min-height: 0;
  }

  .resource-library a,
  .resource-library > div {
    min-height: 112px;
  }
}

/* ATK visual refine 2026-08-30: stronger industrial identity, same content and structure. */
:root {
  --atk-blue-deep: #042066;
  --fiber-blue: #05b7ef;
  --fiber-blue-soft: rgba(5, 183, 239, 0.18);
  --graphite-deep: #080b0f;
  --graphite-mid: #111820;
  --factory-grey: #e5e9ee;
  --factory-warm: #f8f7f4;
  --rule-dark: rgba(8, 11, 15, 0.18);
}

.site-header {
  min-height: 76px;
  padding-top: 14px;
  padding-bottom: 14px;
  background:
    linear-gradient(180deg, rgba(8, 11, 15, 0.98), rgba(8, 11, 15, 0.78) 68%, rgba(8, 11, 15, 0));
}

.main-nav {
  font-size: 0.73rem;
}

.hero {
  min-height: 92vh;
  align-items: end;
  padding: clamp(132px, 15vh, 172px) clamp(20px, 6vw, 92px) clamp(70px, 8vw, 118px);
  background:
    linear-gradient(90deg, rgba(5, 183, 239, 0.15) 0 1px, transparent 1px),
    linear-gradient(0deg, rgba(229, 233, 238, 0.07) 0 1px, transparent 1px),
    radial-gradient(circle at 82% 27%, rgba(5, 183, 239, 0.12), transparent 28%),
    linear-gradient(118deg, #080b0f 0%, #10151d 46%, #061733 74%, #080b0f 100%);
  background-size: 156px 156px, 156px 156px, auto, auto;
}

.hero::before {
  inset: 76px clamp(20px, 6vw, 92px) 40px;
  background:
    linear-gradient(90deg, transparent 0 13%, rgba(5, 183, 239, 0.72) 13% calc(13% + 2px), transparent calc(13% + 2px)),
    linear-gradient(90deg, transparent 0 66%, rgba(229, 233, 238, 0.18) 66% calc(66% + 1px), transparent calc(66% + 1px)),
    linear-gradient(0deg, transparent 0 72%, rgba(5, 183, 239, 0.36) 72% calc(72% + 2px), transparent calc(72% + 2px));
  border-left: 1px solid rgba(229, 233, 238, 0.26);
  border-bottom: 1px solid rgba(5, 183, 239, 0.45);
}

.hero::after {
  right: clamp(16px, 5vw, 76px);
  bottom: clamp(82px, 13vw, 168px);
  color: rgba(229, 233, 238, 0.048);
  font-size: min(20vw, 15.5rem);
}

.hero-copy {
  max-width: 1180px;
}

.hero-copy::before {
  content: "PRECISION · ENGINEERING · FIBER OPTICS · EUROPE";
  display: block;
  width: fit-content;
  margin-bottom: clamp(24px, 4vw, 54px);
  padding: 9px 12px 8px;
  color: rgba(229, 233, 238, 0.78);
  border: 1px solid rgba(5, 183, 239, 0.36);
  border-left: 4px solid var(--fiber-blue);
  font-family: "Archivo", "IBM Plex Sans", sans-serif;
  font-size: clamp(0.62rem, 0.78vw, 0.78rem);
  font-weight: 800;
  text-transform: uppercase;
}

h1 {
  max-width: 1120px;
  margin-bottom: clamp(22px, 3vw, 42px);
  color: #f8fbff;
  font-size: clamp(4.1rem, 7.15vw, 8.6rem);
  line-height: 0.86;
}

.hero-subnote {
  padding-top: 16px;
  color: rgba(248, 251, 255, 0.76);
  border-top-width: 2px;
}

.hero-copy::after {
  width: min(58vw, 760px);
  height: 4px;
  margin-top: clamp(42px, 6vw, 86px);
  background: linear-gradient(90deg, var(--fiber-blue), var(--atk-blue), rgba(5, 183, 239, 0));
}

.section {
  padding-top: clamp(82px, 8vw, 132px);
  padding-bottom: clamp(82px, 8vw, 132px);
}

.eyebrow {
  margin-bottom: 10px;
  color: var(--atk-blue);
  font-size: 0.68rem;
  opacity: 0.78;
}

.cables .eyebrow,
.engineering .eyebrow,
.resources .eyebrow,
.contact .eyebrow,
.equipment .eyebrow {
  color: var(--fiber-blue);
}

h2 {
  max-width: 820px;
  font-size: clamp(2.35rem, 4vw, 5.15rem);
  line-height: 0.88;
}

.section-head,
.split-head {
  margin-bottom: clamp(36px, 4vw, 58px);
}

.solutions {
  background:
    linear-gradient(90deg, rgba(8, 11, 15, 0.055) 0 1px, transparent 1px),
    linear-gradient(180deg, var(--factory-warm), var(--factory-grey));
  background-size: 124px 124px, auto;
}

.solutions-grid,
.ftth-layout,
.resource-library {
  border-top-width: 2px;
}

.solution-panel {
  min-height: 226px;
}

.solution-panel::before {
  inset: 24px;
  border-top-width: 1px;
}

.solution-panel::after {
  width: 34%;
  height: 3px;
}

.solution-panel span {
  padding: 96px 30px 30px;
  font-size: clamp(1.55rem, 2.15vw, 2.72rem);
  line-height: 0.92;
}

.solution-panel span::before,
.ftth-layout span::before,
.resource-library span::before {
  content: "ATK / TECH";
  display: block;
  margin-bottom: 13px;
  color: var(--fiber-blue);
  font-size: 0.62rem;
  line-height: 1;
}

.solution-panel.solution-cables span::before {
  content: "ATK / CABLE";
}

.solution-panel.dark span::before {
  content: "ATK / HARDWARE";
}

.solution-panel.wide span::before {
  content: "ATK / TOOLS";
}

.cables,
.engineering,
.resources {
  background:
    linear-gradient(90deg, rgba(5, 183, 239, 0.075) 0 1px, transparent 1px),
    linear-gradient(0deg, rgba(229, 233, 238, 0.035) 0 1px, transparent 1px),
    linear-gradient(126deg, #080b0f, #101821 55%, #061833);
  background-size: 132px 132px, 132px 132px, auto;
}

.cable-feature {
  min-height: 350px;
}

.cable-feature::before {
  border-radius: 0;
  transform: rotate(45deg);
}

.tech-word {
  font-size: clamp(4.35rem, 8.2vw, 9.1rem);
}

.ftth {
  background:
    linear-gradient(90deg, rgba(8, 11, 15, 0.045) 0 1px, transparent 1px),
    var(--factory-warm);
  background-size: 128px 128px, auto;
}

.ftth-main {
  min-height: 390px;
}

.ftth-layout span::before {
  content: "ATK / FTTH";
}

.paired-products article {
  background:
    linear-gradient(90deg, rgba(8, 11, 15, 0.05) 0 1px, transparent 1px),
    linear-gradient(135deg, #e2e7ed, #faf9f6);
  background-size: 112px 112px, auto;
}

.paired-copy {
  min-height: 380px;
}

.paired-copy::before {
  content: "";
  position: absolute;
  top: clamp(38px, 5vw, 70px);
  right: clamp(20px, 6vw, 92px);
  width: 58px;
  height: 58px;
  border: 1px solid rgba(5, 183, 239, 0.46);
  background:
    linear-gradient(90deg, transparent 48%, rgba(5, 183, 239, 0.55) 48% 52%, transparent 52%),
    linear-gradient(0deg, transparent 48%, rgba(8, 11, 15, 0.18) 48% 52%, transparent 52%);
}

.engineering {
  min-height: 640px;
  grid-template-columns: minmax(0, 0.82fr) minmax(320px, 0.5fr);
  align-items: center;
  border-top: 1px solid rgba(5, 183, 239, 0.32);
}

.engineering h2 {
  max-width: 880px;
  font-size: clamp(2.9rem, 5vw, 6.5rem);
}

.engineering p {
  max-width: 560px;
  font-size: clamp(1.08rem, 1.3vw, 1.25rem);
}

.engineering-grid {
  border-top-width: 2px;
}

.engineering-grid span {
  min-height: 142px;
  padding: 28px;
  font-size: clamp(1rem, 1.24vw, 1.22rem);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.09), rgba(5, 183, 239, 0.055));
}

.engineering-grid span::before {
  content: "";
  display: block;
  width: 36px;
  height: 2px;
  margin-bottom: 22px;
  background: var(--fiber-blue);
}

.manufacturing {
  min-height: 460px;
  background:
    linear-gradient(90deg, rgba(8, 11, 15, 0.06) 0 1px, transparent 1px),
    linear-gradient(0deg, rgba(8, 11, 15, 0.04) 0 1px, transparent 1px),
    linear-gradient(135deg, #dfe5eb, #fbfaf7 72%);
  background-size: 132px 132px, 132px 132px, auto;
}

.manufacturing h2 {
  max-width: 860px;
}

.manufacturing p {
  max-width: 760px;
  color: #172130;
  font-family: "Archivo", "IBM Plex Sans", sans-serif;
  font-size: clamp(1.55rem, 2.6vw, 3.2rem);
  font-weight: 800;
  line-height: 0.98;
  text-transform: uppercase;
}

.text-link,
.cable-feature a,
.contact-actions a {
  font-size: 0.82rem;
}

@media (max-width: 980px) {
  .hero {
    min-height: 76vh;
    align-items: center;
  }

  .engineering {
    min-height: 0;
    grid-template-columns: 1fr;
  }

  .engineering-grid span {
    min-height: 116px;
  }
}

@media (max-width: 620px) {
  .hero {
    min-height: 560px;
    padding: 104px 18px 58px;
  }

  .hero::before {
    inset: 72px 18px 26px;
  }

  .hero::after {
    bottom: 190px;
    font-size: 6.2rem;
  }

  .hero-copy::before {
    max-width: 270px;
    margin-bottom: 24px;
    font-size: 0.56rem;
    line-height: 1.22;
  }

  h1 {
    font-size: clamp(2.58rem, 12.5vw, 3.05rem);
    line-height: 0.88;
  }

  h2 {
    font-size: clamp(2.1rem, 9.6vw, 2.55rem);
    line-height: 0.92;
  }

  .hero-subnote {
    font-size: 0.76rem;
  }

  .section {
    padding-top: 60px;
    padding-bottom: 60px;
  }

  .section-head,
  .split-head {
    gap: 14px;
    margin-bottom: 28px;
  }

  .solution-panel {
    min-height: 146px;
  }

  .solution-panel span {
    padding: 58px 18px 18px;
    font-size: 1.48rem;
  }

  .cable-feature {
    min-height: 216px;
  }

  .cable-feature::before {
    width: 54px;
    height: 54px;
    margin: 24px 24px 0 auto;
  }

  .tech-word {
    font-size: 4.85rem;
  }

  .paired-copy {
    min-height: 250px;
  }

  .paired-copy::before {
    width: 42px;
    height: 42px;
  }

  .engineering h2 {
    font-size: clamp(2.45rem, 11vw, 3.12rem);
  }

  .engineering-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1px;
    background: rgba(200, 206, 214, 0.18);
  }

  .engineering-grid span {
    min-height: 126px;
    padding: 18px;
    font-size: 0.82rem;
  }

  .manufacturing {
    min-height: 380px;
  }

  .manufacturing p {
    font-size: clamp(1.5rem, 8.6vw, 2.15rem);
  }
}

/* ATK header brand and social bar. */
.site-header {
  justify-content: space-between;
  gap: clamp(16px, 2.6vw, 34px);
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  width: clamp(132px, 13vw, 188px);
  min-height: 48px;
  padding: 8px 10px;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(255, 240, 0, 0.55);
}

.brand-logo img {
  width: 100%;
  height: auto;
}

.social-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  flex: 0 0 auto;
}

.social-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  color: #ffffff;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.16);
  transition: color 160ms ease, background 160ms ease, border-color 160ms ease;
}

.social-links a:hover,
.social-links a:focus-visible {
  color: #080b0f;
  background: #fff000;
  border-color: #fff000;
  outline: 0;
}

.social-links svg {
  width: 19px;
  height: 19px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.social-links a[aria-label="TikTok"] svg,
.social-links a[aria-label="LinkedIn"] svg {
  fill: currentColor;
  stroke: none;
}

.social-links a[aria-label="YouTube"] svg path:first-child {
  fill: currentColor;
  stroke: none;
}

.social-links a[aria-label="YouTube"] svg path:last-child {
  fill: #080b0f;
  stroke: none;
}

@media (max-width: 980px) {
  .site-header {
    min-height: 74px;
  }

  .brand-logo {
    width: clamp(118px, 34vw, 150px);
    min-height: 44px;
    padding: 7px 8px;
  }

  .nav-toggle {
    order: 3;
  }

  .main-nav {
    order: 4;
  }

  .social-links {
    margin-left: auto;
    gap: 6px;
  }

  .social-links a {
    width: 34px;
    height: 34px;
  }

  .social-links svg {
    width: 17px;
    height: 17px;
  }
}

@media (max-width: 620px) {
  .brand-logo {
    width: 116px;
  }

  .social-links {
    gap: 4px;
  }

  .social-links a {
    width: 30px;
    height: 30px;
  }

  .social-links svg {
    width: 15px;
    height: 15px;
  }
}