:root{
  --bg:#06070a;
  --card:#0b0d13;
  --neon-1:#00f0ff;
  --neon-2:#7cff6b;
  --accent:#ff5bd3;
  --glass: rgba(255,255,255,0.04);
  --muted: rgba(255,255,255,0.45);
  --glass-2: rgba(255,255,255,0.03);
  --radius:14px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background: radial-gradient(1200px 400px at 10% 10%, rgba(0,240,255,0.04), transparent),
              radial-gradient(900px 300px at 90% 80%, rgba(124,255,107,0.02), transparent),
              var(--bg);
  color:#eaf6ff;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  display:flex;
  justify-content:center;
  padding:32px;
}

/* container */
.page{
  width: 100%;
  max-width:1100px;
  display:flex;
  flex-direction:column;
  gap:18px;
}

/* topbar */
.topbar{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:12px;
}
.topbar .back{
  color:var(--muted);
  text-decoration:none;
  font-weight:600;
  padding:8px 12px;
  background:var(--glass);
  border-radius:10px;
}
.topbar h1{margin:0;font-size:20px}
.controls-top button{
  background:transparent;border:0;color:var(--muted);font-size:20px;cursor:pointer;padding:6px 8px;border-radius:8px;
}
.controls-top button[aria-pressed="false"]{opacity:0.5}

/* game area layout */
.game-area{
  display:grid;
  grid-template-columns: 1fr 320px;
  gap:18px;
  align-items:start;
}

/* UI card */
.game-ui{
  background: linear-gradient(180deg, rgba(255,255,255,0.02), transparent);
  border-radius:var(--radius);
  padding:14px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.6);
  border: 1px solid rgba(255,255,255,0.03);
}

/* meta */
.meta{display:flex;justify-content:space-between;align-items:center;padding:6px 8px 12px 8px}
.meta .score,.meta .highscore{font-weight:700;background:linear-gradient(90deg,var(--glass),transparent);padding:8px 10px;border-radius:10px;font-size:14px}

/* canvas wrap */
.canvas-wrap{position:relative;border-radius:12px;overflow:hidden;margin:6px 0;border:1px solid rgba(255,255,255,0.03);}
#gameCanvas{display:block;width:100%;height:auto;background:
  linear-gradient(to bottom, rgba(4,6,20,0.9), rgba(2,3,10,0.85));}

/* overlay */
.overlay{
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;pointer-events:none;
}
.overlay-card{
  width:88%;max-width:620px;padding:18px;background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  border-radius:12px;text-align:center;backdrop-filter: blur(6px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.6);
  border:1px solid rgba(255,255,255,0.04);
  pointer-events:auto;
}
.overlay-card h2{margin:6px 0 8px;font-size:22px}
.overlay-card p{color:var(--muted);margin:0 0 12px}
.overlay-actions{display:flex;gap:10px;justify-content:center;margin-bottom:8px}
.cta{
  background:linear-gradient(90deg,var(--neon-1),var(--accent));
  color:#031016;border:0;padding:10px 16px;border-radius:10px;font-weight:700;cursor:pointer;
  box-shadow:0 6px 20px rgba(0,240,255,0.09), 0 4px 8px rgba(255,91,211,0.06);
}
.muted{
  background:transparent;border:1px solid rgba(255,255,255,0.06);color:var(--muted);padding:8px 12px;border-radius:10px;cursor:pointer;
}

/* on-screen controls */
.game-controls{display:flex;gap:8px;justify-content:center;padding-top:8px}
.touch{padding:10px 14px;border-radius:10px;border:0;background:var(--glass-2);color:var(--muted);font-weight:700;cursor:pointer}

/* description column */
.desc{
  background:var(--card);
  border-radius:var(--radius);
  padding:16px;
  border:1px solid rgba(255,255,255,0.03);
}
.desc h3{margin-top:0}
.desc ul{margin:8px 0 0 18px;color:var(--muted)}

/* footer */
.foot{color:var(--muted);text-align:center;padding:4px;font-size:13px}

/* neon glow for canvas elements using CSS filters on the canvas element */
#gameCanvas { filter: drop-shadow(0 6px 16px rgba(0, 240, 255, 0.06)) drop-shadow(0 -6px 12px rgba(124,255,107,0.02)); }

/* responsive */
@media (max-width:980px){
  .game-area{grid-template-columns: 1fr;}
  .desc{order:2}
  .canvas-wrap{order:1}
}