:root {
  --bg: #030b1a;
  --panel: rgba(10, 22, 47, 0.72);
  --text: #dff7ff;
  --muted: #9bc9da;
  --accent: #61f3ff;
  --accent-strong: #4cc3ff;
  --line: rgba(100, 210, 255, 0.16);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 50% -10%, #123661 0%, var(--bg) 45%);
  overflow-x: hidden;
}

.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 42px 42px;
  opacity: 0.18;
  pointer-events: none;
  z-index: -2;
}

.bg-glow {
  position: fixed;
  inset: auto 0 -180px 0;
  height: 320px;
  background: radial-gradient(
    circle at 50% 0,
    rgba(88, 228, 255, 0.36),
    rgba(88, 228, 255, 0)
  );
  pointer-events: none;
  z-index: -1;
}

.hero {
  position: relative;
  height: min(78vh, 740px);
  min-height: 480px;
  display: grid;
  place-items: center;
  text-align: center;
  isolation: isolate;
}

.hero-small {
  height: min(54vh, 520px);
  min-height: 340px;
}

.hero-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 38%;
  filter: saturate(1.1) contrast(1.08);
}

.top-nav {
  position: absolute;
  top: 1rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  gap: 0.5rem;
  padding: 0.5rem;
  background: rgba(5, 16, 38, 0.62);
  border: 1px solid rgba(103, 209, 255, 0.32);
  border-radius: 999px;
  backdrop-filter: blur(5px);
}

.top-nav a {
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  color: var(--text);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
}

.top-nav a:hover {
  color: #022535;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to bottom, rgba(2, 11, 28, 0.38), rgba(2, 11, 28, 0.82)),
    radial-gradient(circle at center, rgba(66, 218, 255, 0.16), transparent 60%);
}

.hero-content {
  position: relative;
  max-width: 760px;
  padding: 2rem 1.25rem;
}

.eyebrow {
  display: inline-block;
  margin: 0 0 0.5rem;
  color: var(--accent);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-size: 0.75rem;
  font-weight: 700;
}

h1 {
  margin: 0;
  font-size: clamp(2.3rem, 5vw, 4.6rem);
  line-height: 1.05;
  text-shadow: 0 0 18px rgba(93, 255, 255, 0.44);
}

.hero p {
  margin: 1rem auto 1.5rem;
  max-width: 52ch;
  color: var(--muted);
  font-size: clamp(1rem, 2.1vw, 1.2rem);
}

.cta {
  display: inline-block;
  padding: 0.8rem 1.25rem;
  color: #022535;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  border-radius: 12px;
  text-decoration: none;
  font-weight: 700;
  box-shadow:
    0 0 0 1px rgba(120, 233, 255, 0.4),
    0 12px 26px rgba(0, 181, 255, 0.28);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.cta:hover {
  transform: translateY(-2px);
  box-shadow:
    0 0 0 1px rgba(120, 233, 255, 0.5),
    0 16px 30px rgba(0, 181, 255, 0.36);
}

.content {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto 4rem;
}

.intro {
  text-align: center;
  margin-top: 3.4rem;
  margin-bottom: 2rem;
}

.intro h2 {
  font-size: clamp(1.8rem, 3.4vw, 3rem);
  margin: 0 0 0.8rem;
}

.intro p {
  max-width: 72ch;
  margin: 0 auto;
  color: var(--muted);
}

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

.card {
  background: linear-gradient(170deg, rgba(20, 33, 65, 0.92), var(--panel));
  border: 1px solid rgba(103, 209, 255, 0.2);
  border-radius: 22px;
  padding: 1.4rem 1.25rem;
  backdrop-filter: blur(3px);
  box-shadow: inset 0 0 24px rgba(64, 195, 255, 0.08);
}

.card h3 {
  margin: 0 0 0.8rem;
  font-size: 1.6rem;
  color: #f0fdff;
}

.card p,
.card li {
  color: var(--muted);
}

.card a {
  display: inline-block;
  margin-top: 0.8rem;
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

.card ul {
  margin: 0;
  padding-left: 1.1rem;
}

.contact-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.contact-list li + li {
  margin-top: 0.45rem;
}

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

.contact-page .card a {
  color: var(--accent);
  text-decoration: none;
}

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

.site-footer {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto 2rem;
  padding: 1.5rem 1.2rem 1rem;
  border-radius: 20px;
  border: 1px solid rgba(103, 209, 255, 0.2);
  background: linear-gradient(170deg, rgba(12, 26, 52, 0.9), rgba(8, 18, 40, 0.78));
  box-shadow: inset 0 0 24px rgba(64, 195, 255, 0.08);
}

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

.site-footer h4 {
  margin: 0 0 0.65rem;
  color: #f0fdff;
  font-size: 1.05rem;
}

.site-footer p {
  margin: 0;
  color: var(--muted);
}

.footer-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-list li + li {
  margin-top: 0.42rem;
}

.footer-list a {
  color: var(--muted);
  text-decoration: none;
}

.footer-list a:hover {
  color: var(--accent);
}

.footer-copy {
  margin-top: 1.1rem;
  padding-top: 0.8rem;
  border-top: 1px solid rgba(103, 209, 255, 0.16);
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 920px) {
  .top-nav {
    flex-wrap: wrap;
    justify-content: center;
    width: min(96%, 640px);
    border-radius: 18px;
  }

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

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

  .infrastructure-page .cards {
    grid-template-columns: 1fr;
  }

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

  .hero {
    min-height: 420px;
    height: 70vh;
  }
}

@media (max-width: 640px) {
  .cards {
    grid-template-columns: 1fr;
  }

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