:root {
  --bg: #070b16;
  --panel: #10182b;
  --panel-light: #16213a;
  --text: #f5f7fb;
  --muted: #aab6d3;
  --accent: #5ee7ff;
  --accent-2: #8b5cf6;
  --border: rgba(255, 255, 255, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 20% 10%, rgba(94, 231, 255, 0.18), transparent 30%),
    radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.2), transparent 32%),
    var(--bg);
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  min-height: 92vh;
  padding: 24px;
}

.nav {
  max-width: 1120px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.04em;
}

.logo span {
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 24px;
  color: var(--muted);
  font-weight: 600;
}

.nav-links a:hover {
  color: var(--text);
}

.hero {
  max-width: 1120px;
  margin: 110px auto 0;
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 40px;
  align-items: center;
}

.eyebrow {
  color: var(--accent);
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 0.78rem;
}

h1 {
  margin: 12px 0 18px;
  font-size: clamp(3rem, 8vw, 6.7rem);
  line-height: 0.92;
  letter-spacing: -0.08em;
}

h2 {
  margin: 0 0 16px;
  font-size: clamp(2rem, 4vw, 3.25rem);
  line-height: 1;
  letter-spacing: -0.05em;
}

h3 {
  margin: 0 0 10px;
  font-size: 1.25rem;
}

.hero-text {
  max-width: 640px;
  color: var(--muted);
  font-size: 1.18rem;
}

.hero-actions {
  display: flex;
  gap: 14px;
  margin-top: 32px;
  flex-wrap: wrap;
}

.btn,
.signup button {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 14px 22px;
  font-weight: 800;
  cursor: pointer;
}

.btn.primary,
.signup button {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #03101d;
  border: 0;
}

.btn.secondary {
  background: rgba(255, 255, 255, 0.06);
}

.hero-card,
.card,
.newsletter {
  border: 1px solid var(--border);
  background: rgba(16, 24, 43, 0.72);
  backdrop-filter: blur(16px);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.28);
}

.hero-card {
  border-radius: 32px;
  padding: 34px;
  min-height: 330px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  position: relative;
  overflow: hidden;
}

.hero-card::before {
  content: "";
  position: absolute;
  inset: -30%;
  background: conic-gradient(from 90deg, transparent, rgba(94, 231, 255, 0.35), transparent, rgba(139, 92, 246, 0.35), transparent);
  animation: rotate 10s linear infinite;
  opacity: 0.55;
}

.hero-card > * {
  position: relative;
}

.pulse {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent), transparent 65%);
  margin-bottom: 70px;
  animation: pulse 2.2s ease-in-out infinite;
}

.section {
  max-width: 1120px;
  margin: 0 auto;
  padding: 90px 24px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-top: 28px;
}

.card {
  border-radius: 24px;
  padding: 24px;
}

.card p,
.newsletter p,
.compact p,
footer {
  color: var(--muted);
}

.newsletter {
  max-width: 1120px;
  margin: 30px auto;
  border-radius: 32px;
  padding: 42px;
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  gap: 28px;
  align-items: center;
}

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

.signup input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
  padding: 15px 18px;
  font-size: 1rem;
}

.signup input::placeholder {
  color: #8390ad;
}

.compact {
  text-align: center;
  max-width: 760px;
}

footer {
  text-align: center;
  padding: 36px 20px 48px;
}

@keyframes rotate {
  to { transform: rotate(360deg); }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.85; }
  50% { transform: scale(1.16); opacity: 1; }
}

@media (max-width: 850px) {
  .nav {
    align-items: flex-start;
    gap: 20px;
  }

  .nav-links {
    gap: 14px;
    font-size: 0.9rem;
  }

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

  .hero {
    margin-top: 70px;
  }

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

  .signup {
    flex-direction: column;
  }
}

@media (max-width: 560px) {
  .site-header {
    padding: 18px;
  }

  .nav {
    flex-direction: column;
  }

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

  .newsletter {
    margin: 20px 18px;
    padding: 28px;
  }
}