:root{
  --neon:#00ffd5;
  --pink:#ff2fd0;
  --blue:#4cc9ff;
  --bg:#050505;
}

.app {
  display: flex;
  flex-direction: column;
  align-items: center;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at center,
      #101820 0%,
      #050505 45%,
      #000 100%);
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  color: white;
  font-family: 'Inter', sans-serif;
}



canvas {
  display: block;
  max-width: 90vmin;
  max-height: 90vmin;
  filter:
    drop-shadow(0 0 25px rgba(0,255,213,0.4))
    drop-shadow(0 0 60px rgba(0,255,213,0.15));
}


button {
  margin-top: 12px;
  padding: 10px 20px;
  background: linear-gradient(135deg, var(--neon), var(--blue));
  color: black;
  box-shadow:
    0 0 15px rgba(0,255,213,.8),
    0 0 40px rgba(76,201,255,.3);
  border: none;
  border-radius: 6px;
  cursor: pointer;
} 
button:hover{
  transform:scale(1.05);
}
.landing{
  text-align:center;
  margin-bottom:20px;
}

.controls{
  margin-bottom:10px;
}
.landing,.controls{
  background:rgba(0,0,0,.35);
  backdrop-filter:blur(16px);
  padding:26px 40px;
  border-radius:20px;
  box-shadow:
    0 0 40px rgba(0,255,213,.15),
    inset 0 0 20px rgba(255,255,255,.05);
}

.hidden{
  display:none;
}

h1{
  margin-bottom:4px;
  font-weight:600;
  letter-spacing:2px;
  color: var(--neon);
  font-family: 'Orbitron', sans-serif;
  text-transform: uppercase;
}

p{
  opacity:.7;
  margin-bottom:14px;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  background:
    radial-gradient(circle,#ffffff22 1px,transparent 1px),
    radial-gradient(circle,#ffffff15 1px,transparent 1px),
    radial-gradient(circle,#ffffff10 1px,transparent 1px);
  background-size: 40px 40px, 70px 70px, 120px 120px;
  animation: stars 90s linear infinite;
  pointer-events:none;
}

body::after{
  content:"";
  position:fixed;
  inset:0;
  background:
    radial-gradient(circle at 30% 40%, rgba(0,255,213,.12), transparent 60%),
    radial-gradient(circle at 70% 60%, rgba(76,201,255,.10), transparent 60%),
    radial-gradient(circle at 50% 50%, rgba(255,47,208,.08), transparent 65%);
  filter: blur(60px);
  pointer-events:none;
}

@keyframes stars{
  from{ transform:translateY(0); }
  to{ transform:translateY(-1200px); }
}