:root {
  color-scheme: dark;
  font-family: "Space Grotesk", system-ui, sans-serif;
}

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

body {
  background: radial-gradient(circle at 12% 18%, rgba(20, 35, 80, 0.55), transparent 45%),
    radial-gradient(circle at 80% 15%, rgba(6, 28, 35, 0.6), transparent 45%),
    radial-gradient(circle at 50% 85%, rgba(70, 20, 110, 0.5), transparent 40%),
    #04060b;
  color: #edf0ff;
  min-height: 100vh;
  overflow: hidden;
}

#particle-container {
  position: fixed;
  inset: 0;
  z-index: 0;
}

.grid {
  position: fixed;
  inset: 0;
  z-index: 1;
  background-image: linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 120px 120px;
  opacity: 0.35;
  mask-image: radial-gradient(circle at 40% 20%, rgba(0, 0, 0, 0.8), transparent 70%);
  pointer-events: none;
}

.veil {
  position: fixed;
  inset: 0;
  background: radial-gradient(circle at 55% 20%, rgba(5, 7, 12, 0.2), rgba(2, 3, 5, 0.92) 65%);
  z-index: 1;
  pointer-events: none;
}

.site-header {
  position: relative;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 28px 10vw 0;
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: rgba(176, 200, 255, 0.55);
}

.brand {
  letter-spacing: 0.42em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 18px;
}

.stamp {
  font-size: 11px;
  color: rgba(142, 255, 232, 0.6);
}

.nav-link {
  font-size: 11px;
  letter-spacing: 0.38em;
  text-decoration: none;
  color: rgba(237, 240, 255, 0.78);
  transition: opacity 0.2s ease;
}

.nav-link:hover,
.nav-link:focus-visible {
  opacity: 0.7;
}

.stage {
  position: relative;
  z-index: 2;
  min-height: calc(100vh - 140px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 16px;
  padding: 56px 10vw 64px;
  max-width: 760px;
}

.eyebrow {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.5em;
  text-transform: uppercase;
  color: rgba(176, 200, 255, 0.55);
}

h1 {
  font-size: clamp(36px, 5vw, 64px);
  line-height: 1.05;
  font-weight: 600;
}

.tagline {
  font-size: 16px;
  color: rgba(225, 232, 255, 0.62);
  max-width: 560px;
}

.note {
  font-size: 14px;
  color: rgba(186, 198, 228, 0.55);
  max-width: 520px;
}

.signal {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: rgba(160, 255, 236, 0.7);
  padding: 0 10vw 28px;
}

.signal .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #5dffe7;
  box-shadow: 0 0 18px rgba(93, 255, 231, 0.9);
  animation: pulse 2.8s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
    opacity: 0.65;
  }
  50% {
    transform: scale(1.6);
    opacity: 1;
  }
}

@media (max-width: 720px) {
  .site-header {
    padding: 22px 8vw 0;
  }

  .stage {
    padding: 40px 8vw 52px;
  }

  .signal {
    padding: 0 8vw 22px;
  }
}