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

html {
  scroll-behavior: smooth;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  background: #06131f;
  color: #f3fbff;
  line-height: 1.6;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 8%;
  background: rgba(4, 17, 29, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(108, 213, 255, 0.18);
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: 1px;
  color: #7ee7ff;
}

nav {
  display: flex;
  gap: 20px;
  align-items: center;
  flex-wrap: wrap;
}

nav a {
  color: #d7f7ff;
  text-decoration: none;
  font-size: 0.95rem;
  transition: 0.3s;
}

nav a:hover {
  color: #7ee7ff;
}

.concept-link {
  padding: 9px 14px;
  border: 1px solid rgba(126, 231, 255, 0.45);
  border-radius: 999px;
}

.hero {
  min-height: 86vh;
  display: flex;
  align-items: center;
  padding: 80px 8%;
  background:
    radial-gradient(circle at top left, rgba(57, 184, 255, 0.28), transparent 34%),
    radial-gradient(circle at bottom right, rgba(0, 255, 170, 0.16), transparent 32%),
    linear-gradient(135deg, #06131f 0%, #092b45 50%, #063342 100%);
  overflow: hidden;
}

.hero-content {
  max-width: 820px;
}

.eyebrow {
  color: #7ee7ff;
  text-transform: uppercase;
  letter-spacing: 3px;
  font-size: 0.8rem;
  font-weight: 700;
  margin-bottom: 18px;
}

h1 {
  font-size: clamp(2.4rem, 7vw, 5.4rem);
  line-height: 1.02;
  margin-bottom: 24px;
}

.hero-text {
  max-width: 690px;
  font-size: 1.15rem;
  color: #c9edf6;
  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;
  transition: 0.3s;
}

.btn.primary {
  background: #7ee7ff;
  color: #06131f;
}

.btn.primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 35px rgba(126, 231, 255, 0.25);
}

.btn.secondary {
  border: 1px solid rgba(255, 255, 255, 0.35);
  color: #ffffff;
}

.btn.secondary:hover {
  border-color: #7ee7ff;
  color: #7ee7ff;
}

.section,
.cards-section {
  padding: 86px 8%;
}

.section h2,
.cards-section h2 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  margin-bottom: 22px;
  color: #ffffff;
}

.section p {
  max-width: 860px;
  color: #c9edf6;
  font-size: 1.08rem;
}

.cards-section {
  background: #081a2b;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 32px;
}

.card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(126, 231, 255, 0.16);
  border-radius: 24px;
  padding: 28px;
  min-height: 230px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
}

.card h3 {
  color: #7ee7ff;
  font-size: 1.35rem;
  margin-bottom: 14px;
}

.card p {
  color: #ccecf5;
}

.dark {
  background:
    linear-gradient(135deg, rgba(4, 17, 29, 0.95), rgba(3, 46, 63, 0.95));
}

.roadmap {
  display: grid;
  gap: 16px;
  max-width: 850px;
  margin-top: 28px;
}

.roadmap div {
  padding: 18px 20px;
  border-left: 4px solid #7ee7ff;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 14px;
  color: #d9f7ff;
}

.contact {
  text-align: center;
  background: #071723;
}

.contact p {
  margin: 0 auto 18px;
}

.email {
  display: inline-block;
  margin-top: 10px;
  color: #06131f;
  background: #7ee7ff;
  padding: 14px 20px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 800;
}

footer {
  padding: 28px 8%;
  text-align: center;
  color: #98cbd8;
  background: #040d16;
  border-top: 1px solid rgba(126, 231, 255, 0.14);
}

@media (max-width: 800px) {
  .site-header {
    flex-direction: column;
    gap: 14px;
  }

  nav {
    justify-content: center;
  }

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

  .hero {
    min-height: auto;
    padding-top: 70px;
    padding-bottom: 70px;
  }
}