:root{
  --bg1:#05031a;
  --bg2:#0b0b1a;
  --accent:#00e6a8;
  --accent-2:#7afcff;
  --muted:#a8b3c7;
  --glass: rgba(255,255,255,0.04);
  --neon: 0 0 18px rgba(0,230,168,0.25), 0 0 40px rgba(122,252,255,0.06);
  --radius:14px;
  --btn-radius:10px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
}

*{box-sizing:border-box}
html,body{height:100%;margin:0;background:
  radial-gradient(1200px 600px at 10% 20%, rgba(0,230,168,0.05), transparent 8%),
  radial-gradient(1000px 500px at 90% 80%, rgba(122,252,255,0.03), transparent 12%),
  linear-gradient(180deg,var(--bg1),var(--bg2));
  color:#e6eef8;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

.shell{
  max-width:1200px;margin:28px auto;padding:18px;
  display:flex;flex-direction:column;gap:18px;
}

.topbar{
  display:flex;align-items:center;justify-content:space-between;
  gap:12px;padding:12px;border-radius:12px;background:linear-gradient(180deg, rgba(255,255,255,0.02), transparent);
  box-shadow: var(--neon);
}

.title{display:flex;align-items:center;gap:12px}
.title .icon{font-size:28px}
.title h1{font-size:20px;margin:0}

.controls{display:flex;gap:8px;align-items:center}
.btn{
  background:transparent;border:1px solid rgba(255,255,255,0.06);padding:8px 12px;border-radius:var(--btn-radius);cursor:pointer;
  color:var(--muted);font-weight:600;backdrop-filter: blur(6px);
}
.btn.primary{
  background:linear-gradient(90deg,var(--accent),var(--accent-2));
  color:#001;box-shadow:0 6px 20px rgba(0,230,168,0.12);border: none;
}
.btn.ghost{background:transparent;border:1px solid rgba(255,255,255,0.04);color:#d7eaf0}

.toggle-sound{display:inline-flex;align-items:center;gap:6px;color:var(--muted);font-weight:600}
.toggle-sound input{transform:scale(1.0)}

.main{display:flex;gap:16px}
.sidebar{
  width:280px;padding:16px;border-radius:12px;background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  border:1px solid rgba(255,255,255,0.03);box-shadow:var(--neon);
  display:flex;flex-direction:column;gap:12px;
}
.stat{display:flex;justify-content:space-between;align-items:center;padding:12px;border-radius:10px;background:var(--glass)}
.stat .label{color:var(--muted);font-size:13px}
.stat .value{font-weight:800;font-size:20px;color:var(--accent)}
.powerups{padding:12px;border-radius:10px;background:linear-gradient(90deg, rgba(122,252,255,0.02), rgba(0,230,168,0.02));font-size:14px}
.help{font-size:13px;color:var(--muted);line-height:1.4}
.links{display:flex;flex-direction:column;gap:8px;margin-top:auto}

.game-area{flex:1;display:flex;align-items:center;justify-content:center;padding:12px}
.canvas-wrap{position:relative;width:100%;max-width:960px;border-radius:16px;overflow:hidden;
  background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(0,0,0,0.1));box-shadow:var(--neon);
  border:1px solid rgba(255,255,255,0.03);padding:12px;
}
canvas{display:block;background:
  radial-gradient(circle at 10% 10%, rgba(0,230,168,0.02), transparent 8%),
  linear-gradient(180deg, rgba(2,6,23,0.6), rgba(5,9,28,0.92));width:100%;height:auto;border-radius:10px;}

/* Overlay for messages */
.overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;pointer-events:none}
.overlay .overlay-message{pointer-events:auto;background:linear-gradient(180deg, rgba(0,0,0,0.6), rgba(0,0,0,0.4));padding:18px;border-radius:12px;text-align:center;backdrop-filter: blur(6px);border:1px solid rgba(255,255,255,0.04)}
.overlay .overlay-actions{margin-top:12px;display:flex;gap:8px;justify-content:center}
.overlay .btn{pointer-events:auto}

/* neon glows for arrows/player */
.glow{filter:drop-shadow(0 0 6px rgba(0,230,168,0.8)) drop-shadow(0 0 18px rgba(122,252,255,0.12))}

/* small screens */
@media (max-width:900px){
  .main{flex-direction:column}
  .sidebar{width:100%}
  .canvas-wrap{max-width:100%}
}