* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  background:
    radial-gradient(circle at top right, rgba(0, 180, 255, 0.18), transparent 32%),
    linear-gradient(135deg, #020617 0%, #06111f 45%, #020617 100%);
  color: #e5eef8;
  line-height: 1.6;
}

.navbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 8%;
  background: rgba(2, 6, 23, 0.84);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.18);
}

.logo {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #ffffff;
}

nav {
  display: flex;
  gap: 24px;
}

nav a {
  color: #b9c7d9;
  text-decoration: none;
  font-size: 0.92rem;
}

nav a:hover {
  color: #38bdf8;
}

.hero {
  min-height: 88vh;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 48px;
  padding: 80px 8%;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.07) 1px, transparent 1px);
  background-size: 52px 52px;
  mask-image: linear-gradient(to bottom, black, transparent 85%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.eyebrow {
  color: #38bdf8;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.78rem;
  font-weight: 700;
  margin-bottom: 16px;
}

h1 {
  font-size: clamp(2.6rem, 6vw, 5.4rem);
  line-height: 1.02;
  max-width: 950px;
  letter-spacing: -0.05em;
  margin-bottom: 24px;
}

.hero-text {
  max-width: 680px;
  color: #cbd5e1;
  font-size: 1.18rem;
  margin-bottom: 34px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 14px 22px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
}

.btn.primary {
  background: #38bdf8;
  color: #020617;
}

.btn.secondary {
  border: 1px solid rgba(226, 232, 240, 0.35);
  color: #e5eef8;
}

.hero-visual {
  min-height: 460px;
  position: relative;
  z-index: 2;
  display: grid;
  place-items: center;
}

.airship {
  width: 340px;
  height: 95px;
  border-radius: 50%;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.9), rgba(148, 163, 184, 0.52)),
    linear-gradient(90deg, transparent 0%, rgba(56,189,248,0.38) 55%, transparent 100%);
  box-shadow: 0 0 80px rgba(56, 189, 248, 0.22);
  position: relative;
}

.airship::before {
  content: "";
  position: absolute;
  width: 88px;
  height: 24px;
  background: rgba(15, 23, 42, 0.75);
  left: 124px;
  bottom: -16px;
  border-radius: 0 0 22px 22px;
  border: 1px solid rgba(226, 232, 240, 0.25);
}

.airship::after {
  content: "";
  position: absolute;
  right: -28px;
  top: 32px;
  border-left: 48px solid rgba(203, 213, 225, 0.75);
  border-top: 20px solid transparent;
  border-bottom: 20px solid transparent;
}

.radar-ring {
  position: absolute;
  border: 1px solid rgba(56, 189, 248, 0.26);
  border-radius: 50%;
  animation: pulse 4s infinite;
}

.ring-one {
  width: 250px;
  height: 250px;
}

.ring-two {
  width: 390px;
  height: 390px;
  animation-delay: 0.8s;
}

.ring-three {
  width: 540px;
  height: 540px;
  animation-delay: 1.6s;
}

@keyframes pulse {
  0% {
    opacity: 0.9;
    transform: scale(0.86);
  }
  100% {
    opacity: 0;
    transform: scale(1.08);
  }
}

.section {
  padding: 90px 8%;
  border-top: 1px solid rgba(148, 163, 184, 0.12);
}

.section h2 {
  font-size: clamp(2rem, 4vw, 3.6rem);
  line-height: 1.1;
  letter-spacing: -0.04em;
  max-width: 1000px;
  margin-bottom: 22px;
}

.section > p {
  max-width: 850px;
  color: #cbd5e1;
  font-size: 1.08rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-top: 34px;
}

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

.card {
  background: rgba(15, 23, 42, 0.72);
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: 24px;
  padding: 26px;
  min-height: 220px;
}

.card h3 {
  color: #ffffff;
  font-size: 1.12rem;
  margin-bottom: 14px;
}

.card p {
  color: #b9c7d9;
}

.use-list {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.use-list span {
  padding: 13px 18px;
  border-radius: 999px;
  background: rgba(56, 189, 248, 0.09);
  border: 1px solid rgba(56, 189, 248, 0.28);
  color: #dff6ff;
}

.contact {
  background: rgba(56, 189, 248, 0.045);
}

.email {
  display: inline-block;
  margin-top: 22px;
  color: #38bdf8;
  font-size: 1.3rem;
  font-weight: 700;
  text-decoration: none;
}

footer {
  padding: 28px 8%;
  color: #94a3b8;
  border-top: 1px solid rgba(148, 163, 184, 0.12);
}

@media (max-width: 900px) {
  .navbar {
    align-items: flex-start;
    gap: 16px;
    flex-direction: column;
  }

  nav {
    flex-wrap: wrap;
    gap: 14px;
  }

  .hero {
    grid-template-columns: 1fr;
    padding-top: 56px;
  }

  .hero-visual {
    min-height: 320px;
  }

  .airship {
    width: 260px;
    height: 75px;
  }

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