:root {
  --black: #09090d;
  --graphite: #151620;
  --card: #202231;
  --text: #f6f7fb;
  --muted: #b2b6c8;
  --lime: #c7ff4a;
  --violet: #9d74ff;
  --cyan: #52e6ff;
  --line: rgba(255, 255, 255, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    var(--black);
  background-size: 34px 34px;
  font-family: "Arial Narrow", Arial, sans-serif;
}

a {
  color: inherit;
}

.header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding: 18px 4vw;
  background: rgba(9, 9, 13, 0.9);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.brand {
  text-decoration: none;
  font-weight: 900;
  color: var(--lime);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.nav {
  display: flex;
  gap: 10px;
}

.nav a,
.hero-actions a,
button {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 12px 16px;
  color: var(--text);
  text-decoration: none;
  background: rgba(255, 255, 255, 0.06);
  font-weight: 800;
  cursor: pointer;
}

.nav a:hover,
.hero-actions a:hover,
button:hover {
  border-color: var(--lime);
}

.nav-button {
  display: none;
}

.hero {
  min-height: 780px;
  padding: 90px 4vw 70px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(420px, 0.95fr);
  gap: 52px;
  align-items: center;
}

.label {
  margin: 0 0 14px;
  color: var(--lime);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.75rem;
  font-weight: 900;
}

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

h1 {
  font-size: clamp(3.5rem, 8.5vw, 8.8rem);
  line-height: 0.86;
  letter-spacing: -0.09em;
  margin-bottom: 28px;
}

h2 {
  font-size: clamp(2.3rem, 5.5vw, 6rem);
  line-height: 0.9;
  letter-spacing: -0.075em;
}

h3 {
  font-size: 1.45rem;
}

p,
span {
  color: var(--muted);
  line-height: 1.72;
  font-size: 1.03rem;
}

.hero-copy > p:not(.label) {
  max-width: 760px;
  font-size: 1.22rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.hero-actions a:first-child,
form button,
.specialism.active {
  color: var(--black);
  background: var(--lime);
}

.hub-visual {
  min-height: 520px;
  position: relative;
  border-radius: 44px;
  background: radial-gradient(circle at center, rgba(199, 255, 74, 0.18), rgba(157, 116, 255, 0.08), transparent 62%);
  border: 1px solid var(--line);
  overflow: hidden;
}

.hub-visual::before,
.hub-visual::after {
  content: "";
  position: absolute;
  inset: 18%;
  border: 1px dashed rgba(255, 255, 255, 0.18);
  border-radius: 50%;
}

.hub-visual::after {
  inset: 32%;
}

.node {
  position: absolute;
  display: grid;
  place-items: center;
  width: 92px;
  height: 92px;
  border-radius: 50%;
  color: var(--text);
  background: var(--card);
  border: 1px solid var(--line);
  font-weight: 900;
}

.node.main {
  width: 132px;
  height: 132px;
  left: calc(50% - 66px);
  top: calc(50% - 66px);
  color: var(--black);
  background: var(--lime);
}

.n1 { left: 8%; top: 16%; }
.n2 { right: 12%; top: 12%; }
.n3 { right: 7%; bottom: 22%; }
.n4 { left: 14%; bottom: 14%; }
.n5 { left: 40%; top: 4%; }
.n6 { left: 38%; bottom: 5%; }

.ticker {
  display: flex;
  gap: 12px;
  padding: 18px 4vw;
  overflow: hidden;
  border-block: 1px solid var(--line);
  background: var(--graphite);
}

.ticker span {
  flex: 0 0 auto;
  color: var(--lime);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.78rem;
  font-weight: 900;
  animation: move 18s linear infinite;
}

.section,
.contractors,
.contact,
footer {
  padding: 82px 4vw;
}

.section-head {
  max-width: 1120px;
  margin-bottom: 36px;
}

.client-grid,
.model-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.client-grid article,
.contractor-list div,
.model-steps article,
.metrics div,
.contact-card {
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: 26px;
  background: rgba(255, 255, 255, 0.06);
}

.contractors {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
  background: linear-gradient(135deg, rgba(157, 116, 255, 0.16), rgba(82, 230, 255, 0.08));
}

.contractor-list {
  display: grid;
  gap: 14px;
}

.contractor-list strong {
  display: block;
  margin-bottom: 8px;
  color: var(--text);
}

.specialism-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 22px;
}

.specialism-panel {
  max-width: 760px;
  border-left: 4px solid var(--lime);
  padding: 18px 0 18px 24px;
}

.hub-model {
  background: var(--graphite);
}

.model-steps span {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  margin-bottom: 36px;
  border-radius: 50%;
  color: var(--black);
  background: var(--cyan);
  font-weight: 900;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.metrics strong {
  display: block;
  color: var(--lime);
  font-size: clamp(3rem, 7vw, 7rem);
  line-height: 0.85;
  letter-spacing: -0.08em;
}

.content-rich {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 38px;
}

.contact {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 42px;
  background: linear-gradient(135deg, rgba(199, 255, 74, 0.16), rgba(157, 116, 255, 0.12));
}

form {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 14px 16px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  font: inherit;
}

textarea {
  min-height: 130px;
}

footer {
  border-top: 1px solid var(--line);
  background: #050507;
}

.glow {
  opacity: 0;
  transform: translateY(20px);
  transition: 0.65s ease;
}

.glow.visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes move {
  to {
    transform: translateX(-220px);
  }
}

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

  .nav {
    display: none;
    position: absolute;
    top: 74px;
    left: 4vw;
    right: 4vw;
    padding: 18px;
    border-radius: 20px;
    background: var(--graphite);
    flex-direction: column;
  }

  .nav.open {
    display: flex;
  }

  .hero,
  .contractors,
  .client-grid,
  .model-steps,
  .metrics,
  .content-rich,
  .contact {
    grid-template-columns: 1fr;
  }

  .hub-visual {
    min-height: 420px;
  }
}