:root {
  --ink: #15202b;
  --muted: #5d6975;
  --line: #d8dee6;
  --surface: #ffffff;
  --soft: #f4f7fa;
  --deep: #0f2738;
  --accent: #176d8f;
  --accent-strong: #0f5671;
  --highlight: #d89b2b;
  --radius: 8px;
  --shadow: 0 18px 45px rgba(15, 39, 56, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  background: var(--surface);
  line-height: 1.5;
}

a {
  color: inherit;
}

button,
input,
textarea,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.notice {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  min-height: 40px;
  padding: 8px 18px;
  color: #ffffff;
  background: var(--deep);
  font-size: 14px;
}

.icon-button {
  display: inline-grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: var(--radius);
  color: inherit;
  background: transparent;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
  min-height: 78px;
  padding: 0 40px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: var(--radius);
  color: #ffffff;
  background: var(--accent);
  font-weight: 800;
}

.brand strong,
.brand small {
  display: block;
}

.brand small {
  color: var(--muted);
  font-size: 12px;
}

.primary-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.nav-item {
  position: relative;
}

.nav-link,
.plain-nav {
  display: inline-flex;
  align-items: center;
  min-height: 46px;
  padding: 0 14px;
  border: 0;
  border-radius: var(--radius);
  color: var(--ink);
  background: transparent;
  text-decoration: none;
  font-weight: 700;
}

.nav-link:hover,
.plain-nav:hover,
.nav-item.open .nav-link {
  background: var(--soft);
}

.mega-menu {
  position: absolute;
  top: calc(100% + 12px);
  left: 0;
  display: none;
  width: min(720px, 92vw);
  grid-template-columns: repeat(2, minmax(180px, 1fr)) minmax(200px, 0.7fr);
  gap: 24px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
  box-shadow: var(--shadow);
}

.mega-menu.wide {
  grid-template-columns: repeat(3, minmax(180px, 1fr));
}

.nav-item.open .mega-menu {
  display: grid;
}

.mega-menu a {
  display: block;
  padding: 8px 0;
  color: var(--muted);
  text-decoration: none;
}

.mega-menu a:hover {
  color: var(--accent);
}

.menu-label {
  margin: 0 0 8px;
  color: var(--ink);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.menu-feature {
  padding: 18px;
  border-radius: var(--radius);
  background: var(--soft);
}

.header-actions,
.hero-actions,
.cta-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.solid-button,
.ghost-button,
.text-button,
.ghost-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 800;
}

.solid-button {
  border: 1px solid var(--accent);
  color: #ffffff;
  background: var(--accent);
}

.solid-button:hover {
  background: var(--accent-strong);
}

.ghost-button,
.ghost-link {
  border: 1px solid var(--line);
  color: var(--ink);
  background: #ffffff;
}

.ghost-button.light {
  color: #ffffff;
  background: transparent;
  border-color: rgba(255, 255, 255, 0.55);
}

.text-button {
  border: 0;
  color: #ffffff;
  background: var(--deep);
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
}

.menu-toggle span:not(.sr-only) {
  display: block;
  width: 20px;
  height: 2px;
  margin: 4px auto;
  background: var(--ink);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  gap: 48px;
  align-items: center;
  min-height: calc(100vh - 118px);
  padding: 72px 7vw 56px;
  background:
    linear-gradient(135deg, rgba(15, 39, 56, 0.92), rgba(23, 109, 143, 0.74)),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.08) 0 1px, transparent 1px 80px);
  color: #ffffff;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--highlight);
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  max-width: 720px;
  font-size: clamp(48px, 8vw, 92px);
  line-height: 0.95;
}

.hero-text {
  max-width: 680px;
  margin: 22px 0 0;
  font-size: 20px;
}

.hero-actions {
  margin-top: 32px;
  flex-wrap: wrap;
}

.hero-panel {
  padding: 26px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.12);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.22);
}

.status-row {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.22);
}

.network-map {
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
  margin-top: 30px;
  min-height: 120px;
  align-items: center;
}

.network-map::before {
  content: "";
  position: absolute;
  right: 20px;
  left: 20px;
  top: 50%;
  height: 2px;
  background: rgba(255, 255, 255, 0.45);
}

.network-map span {
  position: relative;
  display: block;
  aspect-ratio: 1;
  border: 3px solid #ffffff;
  border-radius: 50%;
  background: var(--accent);
}

.quick-links,
.support-strip {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  border-bottom: 1px solid var(--line);
}

.quick-links a,
.quick-links button,
.support-strip a,
.support-strip button {
  display: grid;
  min-height: 68px;
  place-items: center;
  padding: 12px;
  border: 0;
  border-right: 1px solid var(--line);
  color: var(--ink);
  background: #ffffff;
  text-align: center;
  text-decoration: none;
  font-weight: 800;
}

.quick-links a:hover,
.quick-links button:hover,
.support-strip a:hover,
.support-strip button:hover {
  background: var(--soft);
}

.section,
.band {
  padding: 76px 7vw;
}

.band {
  background: var(--soft);
}

.section-heading {
  max-width: 780px;
  margin-bottom: 34px;
}

.section-heading h2,
.split h2,
.cta h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.05;
}

.section-heading p:not(.eyebrow),
.split p,
.cta p,
.footer p {
  color: var(--muted);
}

.service-grid,
.catalog-grid,
.case-grid,
.capability-grid,
.whitepaper-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.card,
.catalog-card,
.case-card,
.capability,
.whitepaper-grid article {
  min-height: 250px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
}

.card h3,
.catalog-card h3,
.case-card h3,
.capability h3,
.whitepaper-grid h3 {
  margin: 0 0 12px;
  font-size: 22px;
}

.card p,
.catalog-card p,
.capability p,
.whitepaper-grid p {
  color: var(--muted);
}

.private-5g {
  background:
    linear-gradient(180deg, rgba(244, 247, 250, 0.8), rgba(255, 255, 255, 1)),
    #ffffff;
}

.proof-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 20px;
}

.proof-metrics div {
  min-height: 150px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--deep);
  color: #ffffff;
}

.proof-metrics strong,
.proof-metrics span {
  display: block;
}

.proof-metrics strong {
  margin-bottom: 12px;
  color: var(--highlight);
  font-size: 34px;
  line-height: 1;
}

.proof-metrics span {
  color: rgba(255, 255, 255, 0.78);
}

.card a,
.case-card a {
  font-weight: 800;
  color: var(--accent);
  text-decoration: none;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 22px;
}

.filter {
  min-height: 40px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
  font-weight: 800;
}

.filter.active {
  border-color: var(--accent);
  color: #ffffff;
  background: var(--accent);
}

.catalog-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.catalog-card[hidden] {
  display: none;
}

.catalog-card span,
.case-card p {
  color: var(--highlight);
  font-weight: 900;
  text-transform: uppercase;
  font-size: 13px;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1.1fr);
  gap: 48px;
  align-items: center;
}

.industry-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.industry-list button {
  min-height: 64px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
  font-weight: 800;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.metrics div {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--soft);
}

.metrics strong,
.metrics span {
  display: block;
}

.metrics strong {
  color: var(--accent);
  font-size: 36px;
}

.case-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.whitepaper-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.whitepaper-grid article {
  min-height: 220px;
}

.source-note {
  margin: 22px 0 0;
  padding: 16px 18px;
  border-left: 4px solid var(--highlight);
  color: var(--muted);
  background: #ffffff;
}

.cta {
  display: flex;
  justify-content: space-between;
  gap: 32px;
  align-items: center;
  padding: 64px 7vw;
  color: #ffffff;
  background: var(--deep);
}

.cta p {
  max-width: 720px;
  color: rgba(255, 255, 255, 0.76);
}

.support-strip {
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
}

.footer {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 32px;
  padding: 52px 7vw;
  background: #f9fafb;
}

.footer h2 {
  margin: 0 0 12px;
  font-size: 16px;
}

.footer a,
.footer button {
  display: block;
  width: fit-content;
  margin: 9px 0;
  border: 0;
  padding: 0;
  color: var(--muted);
  background: transparent;
  text-align: left;
  text-decoration: none;
}

.modal {
  width: min(560px, calc(100vw - 32px));
  padding: 0;
  border: 0;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.modal::backdrop {
  background: rgba(15, 39, 56, 0.5);
}

.modal-shell {
  position: relative;
  display: grid;
  gap: 16px;
  padding: 28px;
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  color: var(--ink);
}

.modal h2 {
  margin: 0 42px 8px 0;
}

label {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-weight: 800;
}

input,
textarea,
select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px 14px;
  color: var(--ink);
  background: #ffffff;
}

.search-results {
  display: grid;
  gap: 10px;
}

.search-results a {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-decoration: none;
}

.form-status {
  min-height: 24px;
  margin: 0;
  color: var(--accent);
  font-weight: 800;
}

.floating-chat {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 16;
  min-height: 48px;
  padding: 0 20px;
  border: 0;
  border-radius: var(--radius);
  color: #ffffff;
  background: var(--accent);
  box-shadow: var(--shadow);
  font-weight: 900;
}

.chat-widget {
  position: fixed;
  right: 22px;
  bottom: 84px;
  z-index: 18;
  width: min(360px, calc(100vw - 28px));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.chat-header,
.chat-form {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px;
}

.chat-header {
  justify-content: space-between;
  color: #ffffff;
  background: var(--deep);
}

.chat-log {
  display: grid;
  gap: 8px;
  max-height: 260px;
  overflow: auto;
  padding: 14px;
}

.chat-log p {
  margin: 0;
  padding: 10px;
  border-radius: var(--radius);
  background: var(--soft);
}

.chat-form {
  border-top: 1px solid var(--line);
}

.chat-form button {
  min-height: 42px;
  border: 0;
  border-radius: var(--radius);
  color: #ffffff;
  background: var(--accent);
  font-weight: 800;
}

@media (max-width: 1080px) {
  .site-header {
    grid-template-columns: auto auto;
    padding: 0 20px;
  }

  .menu-toggle {
    display: block;
    justify-self: end;
  }

  .primary-nav,
  .header-actions {
    display: none;
  }

  .site-header.nav-open .primary-nav {
    grid-column: 1 / -1;
    display: grid;
    justify-content: stretch;
    padding-bottom: 18px;
  }

  .site-header.nav-open .header-actions {
    grid-column: 1 / -1;
    display: flex;
    padding-bottom: 18px;
  }

  .nav-link,
  .plain-nav {
    width: 100%;
    justify-content: space-between;
  }

  .mega-menu,
  .mega-menu.wide {
    position: static;
    width: 100%;
    grid-template-columns: 1fr;
    margin: 8px 0;
    box-shadow: none;
  }

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

  .service-grid,
  .catalog-grid,
  .capability-grid,
  .whitepaper-grid,
  .proof-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .quick-links,
  .footer {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 680px) {
  .notice {
    justify-content: space-between;
  }

  .hero {
    min-height: auto;
    padding: 56px 20px 44px;
  }

  .section,
  .band,
  .cta,
  .footer {
    padding: 52px 20px;
  }

  .hero-panel {
    display: none;
  }

  .service-grid,
  .catalog-grid,
  .capability-grid,
  .whitepaper-grid,
  .proof-metrics,
  .case-grid,
  .industry-list,
  .metrics,
  .quick-links,
  .support-strip,
  .footer {
    grid-template-columns: 1fr;
  }

  .cta {
    display: grid;
  }

  .cta-actions,
  .header-actions {
    flex-wrap: wrap;
  }

  .solid-button,
  .ghost-button,
  .ghost-link,
  .text-button {
    width: 100%;
  }
}