:root{
  --bg-deep: #02040c;
  --bg-mid: #050b18;
  --bg-glow: #0b1b3a;
  --mouse-glow: 140,180,255;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: radial-gradient(ellipse at 50% 38%, var(--bg-glow) 0%, var(--bg-mid) 52%, var(--bg-deep) 100%);
  cursor: crosshair;
}

canvas {
  position: fixed;
  top: 0;
  left: 0;
  display: block;
  pointer-events: none;
}

#grid   { z-index: 1; }
#bodies { z-index: 3; }

.title {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  pointer-events: none;
  user-select: none;
}

.title h1 {
  margin: 0;
  font-family: 'Orbitron', sans-serif;
  font-weight: 900;
  font-size: clamp(4rem, 17vw, 14rem);
  letter-spacing: 0.14em;
  color: #ffffff;
  text-indent: 0.14em;
  text-shadow:
    0 0 30px rgba(var(--mouse-glow), 0.5),
    0 0 90px rgba(var(--mouse-glow), 0.28),
    0 0 160px rgba(255,255,255,0.10);
  animation: breathe 7s ease-in-out infinite;
}

@keyframes breathe {
  0%, 100% {
    text-shadow:
      0 0 30px rgba(var(--mouse-glow), 0.42),
      0 0 90px rgba(var(--mouse-glow), 0.20),
      0 0 160px rgba(255,255,255,0.07);
  }
  50% {
    text-shadow:
      0 0 40px rgba(var(--mouse-glow), 0.75),
      0 0 120px rgba(var(--mouse-glow), 0.38),
      0 0 200px rgba(255,255,255,0.13);
  }
}

.hint {
  position: fixed;
  left: 0;
  right: 0;
  bottom: calc(34px + 4vh);
  z-index: 2;
  text-align: center;
  pointer-events: none;
  user-select: none;
  font-family: 'Space Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.45);
  transition: opacity 1.2s ease;
}
.hint.hidden { opacity: 0; }

.nasa-ticker {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 4;
  height: 34px;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(2,4,12,0) 0%, rgba(2,4,12,0.85) 45%, rgba(2,4,12,0.92) 100%);
  border-top: 1px solid rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  pointer-events: none;
  font-family: 'Space Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.03em;
  color: rgba(255,255,255,0.6);
}

.nasa-ticker .track {
  display: inline-flex;
  white-space: nowrap;
  will-change: transform;
  animation: scrollTicker 55s linear infinite;
  padding-left: 100%;
}
.nasa-ticker .track span { margin-right: 2.4em; }
.nasa-ticker .track .label { color: #FFD989; font-weight: 700; }

@keyframes scrollTicker {
  from { transform: translateX(0); }
  to   { transform: translateX(-100%); }
}

@media (prefers-reduced-motion: reduce) {
  .title h1 { animation: none; }
  .nasa-ticker .track { animation: none; padding-left: 1rem; white-space: normal; }
}