:root{
  --neon: #55ff55;
  --neon-dim: #00aa00;
  --cyan: #55ffff;
}
*{ box-sizing:border-box; margin:0; padding:0; }
html,body{
  width:100%; height:100%; overflow:hidden;
  background:#000;
  font-family:"Courier New", monospace;
  -webkit-user-select:none; user-select:none;
  -webkit-tap-highlight-color:transparent;
}
canvas{
  display:block;
  position:fixed; inset:0;
  image-rendering:pixelated;
  image-rendering:crisp-edges;
  background:#000;
}

/* ---- loading flourish ---- */
#loading{
  position:fixed; inset:0;
  display:flex; align-items:center; justify-content:center;
  font-size:clamp(24px,6vw,54px);
  font-weight:900; letter-spacing:.3em;
  color:var(--neon);
  z-index:100;
  text-shadow:0 0 12px currentColor;
}
#loading .cursor{ animation:blink .4s steps(1) infinite; }
@keyframes blink{ 50%{opacity:0;} }

/* ---- control panel ---- */
#controls{
  position:fixed; top:12px; left:12px;
  width:min(260px, 78vw);
  background:rgba(0,0,0,0.72);
  border:2px solid var(--neon-dim);
  box-shadow:
    inset 1px 1px 0 #55ff5544,
    inset -2px -2px 0 #003300,
    0 0 20px #00aa0055;
  padding:10px 12px 12px;
  color:var(--neon);
  font-size:11px;
  letter-spacing:.05em;
  z-index:50;
  transition:opacity .5s, transform .5s;
  backdrop-filter:blur(2px);
}
#controls.hidden-controls{
  opacity:0; transform:translateY(-8px);
  pointer-events:none;
}
.panel-title{
  text-align:center;
  color:var(--cyan);
  font-weight:900;
  letter-spacing:.15em;
  margin-bottom:10px;
  text-shadow:0 0 8px var(--cyan);
  font-size:13px;
}
#controls label{
  display:block;
  margin-bottom:9px;
  text-transform:uppercase;
}
#controls label span{ color:var(--cyan); float:right; }

/* retro range sliders */
input[type=range]{
  -webkit-appearance:none; appearance:none;
  width:100%; height:8px; margin-top:5px;
  background:#001a00;
  border:1px solid var(--neon-dim);
  cursor:pointer;
}
input[type=range]::-webkit-slider-thumb{
  -webkit-appearance:none; appearance:none;
  width:12px; height:14px;
  background:var(--neon);
  border:1px solid #003300;
  box-shadow:0 0 6px var(--neon);
}
input[type=range]::-moz-range-thumb{
  width:12px; height:14px; border-radius:0;
  background:var(--neon); border:1px solid #003300;
}

select{
  width:100%; margin-top:5px;
  background:#001a00; color:var(--neon);
  border:1px solid var(--neon-dim);
  font-family:inherit; font-size:11px;
  padding:4px; cursor:pointer;
  text-transform:uppercase;
}

.row{ display:flex; gap:8px; margin-top:6px; }
button{
  flex:1;
  background:#001a00; color:var(--neon);
  border:1px solid var(--neon-dim);
  font-family:inherit; font-size:10px; font-weight:900;
  letter-spacing:.08em;
  padding:7px 4px; cursor:pointer;
  text-transform:uppercase;
  transition:background .12s, color .12s;
}
button:hover{ background:var(--neon-dim); color:#001a00; }
button:active{ transform:translateY(1px); }
button.on{
  background:var(--neon-dim); color:#001a00;
  box-shadow:0 0 8px var(--neon);
}

.hint{
  margin-top:10px;
  color:var(--neon-dim);
  font-size:9px; text-align:center;
  letter-spacing:.05em;
}

#remix{
  position:fixed; bottom:6px; right:8px;
  z-index:50;
  color:var(--neon-dim);
  font-size:10px; letter-spacing:.05em;
  text-decoration:none;
  background:rgba(0,0,0,0.55);
  padding:3px 8px;
  border:1px solid #003300;
}
#remix:hover{ color:var(--neon); border-color:var(--neon-dim); }

@media (max-width:480px){
  #controls{ font-size:10px; padding:8px 10px; }
}
</parameter>
</invoke>