:root{
  --bg:#070b16;
  --fg:#e9eef7;
  --muted:#9fb2cc;
  --hud:rgba(8,12,22,.6);
  --hud-border:rgba(255,255,255,.12);
  --accent:#7bd3ff;
}
*{box-sizing:border-box}
html,body{height:100%;margin:0}
body{
  background: radial-gradient(120vmax 80vmax at 70% 10%, #0b1230 0, var(--bg) 45%) no-repeat, var(--bg);
  color:var(--fg);
  font-family: ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial;
  overflow:hidden;
}
#stage{position:fixed;inset:0;display:block;width:100vw;height:100vh;}

.hud{
  position:fixed; left:0; right:0; top:0;
  display:flex; align-items:center; justify-content:space-between;
  padding:10px 14px;
  background:var(--hud);
  backdrop-filter: blur(6px);
  border-bottom:1px solid var(--hud-border);
  z-index:10;
}
.brand{display:flex; gap:.6rem; align-items:center; font-weight:800; letter-spacing:.3px}
.logo{width:28px;height:28px;display:grid;place-items:center;border-radius:8px;
      color:white;background:linear-gradient(135deg,#6ddcff,#7f60ff)}
.title{font-size:14px}
.controls{display:flex;gap:.5rem}
button{
  background:linear-gradient(135deg,#6ddcff 0%,#7f60ff 100%);
  color:white;border:none;border-radius:10px;padding:.45rem .7rem;font-weight:600;cursor:pointer;
  box-shadow:0 10px 24px -12px rgba(125,98,255,.75);
}
button:active{transform:translateY(1px)}

.overlay{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,.55);z-index:20}
.hidden{display:none}
.modal{
  width:min(640px,92vw); background:rgba(15,20,35,.85); border:1px solid var(--hud-border);
  border-radius:16px; padding:12px 12px 16px; box-shadow: 0 30px 80px -20px rgba(0,0,0,.6);
}
.modal-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.modal h2{margin:.2rem 0 .4rem;font-size:18px}
.modal .grid{display:grid;grid-template-columns:repeat(4,1fr);gap:.5rem}
.chip{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.18);border-radius:10px;
  padding:.55rem .7rem;color:var(--fg);cursor:pointer;font-weight:600;
}
.tip{color:var(--muted);font-size:12px;margin:.75rem 0 0}
@media (max-width:560px){ .modal .grid{grid-template-columns:repeat(2,1fr)} }