:root{
  --bg:#08060a;
  --panel:#0e0f13;
  --accent1:#00e5ff;
  --accent2:#7c3aed;
  --muted:rgba(230,238,248,0.65);
}
*{box-sizing:border-box}
html,body{height:100%;margin:0;font-family:Inter,system-ui,Segoe UI,Roboto,Arial,sans-serif;background:radial-gradient(800px 400px at 10% 10%, rgba(124,58,237,0.06), transparent 10%), linear-gradient(180deg,var(--bg), #040406);color:#e6eef8}
.page{min-height:100vh;display:flex;flex-direction:column;align-items:center;padding:28px}
.top{text-align:center;margin-bottom:18px}
.top h1{font-family:Orbitron,monospace;margin:0;font-size:2rem;color:var(--accent2);background:linear-gradient(90deg,var(--accent2),var(--accent1));-webkit-background-clip:text;background-clip:text}
.top .tag{color:var(--muted);margin-top:6px}
.game-wrap{display:flex;gap:22px;width:100%;max-width:1100px}
.board-area{flex:1;position:relative;display:flex;align-items:center;justify-content:center}
/* Make playfield smaller to avoid page scroll on most viewports */
#playfield{background:linear-gradient(180deg,rgba(255,255,255,0.02),rgba(0,0,0,0.2));border-radius:12px;box-shadow:0 10px 40px rgba(2,6,23,0.7);display:block;width:100%;max-width:320px;max-height:calc(100vh - 220px);height:auto}
.panel-side{width:260px;display:flex;flex-direction:column;gap:16px}
.panel-side .info{background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));padding:12px;border-radius:10px;border:1px solid rgba(255,255,255,0.03)}
.info-row{display:flex;justify-content:space-between;padding:8px 6px}
.info-row span{color:var(--muted)}
.info-row strong{font-family:Orbitron,monospace;color:var(--accent1)}
.next{background:var(--panel);padding:10px;border-radius:10px;border:1px solid rgba(255,255,255,0.03);display:flex;flex-direction:column;align-items:center}
.next .label{color:var(--muted);margin-bottom:8px}
.controls{background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));padding:10px;border-radius:10px;border:1px solid rgba(255,255,255,0.03)}
.controls .label{color:var(--muted);margin-bottom:8px}
.controls ul{margin:0;padding:0 12px 8px 18px;color:var(--muted)}
.footer-note{color:var(--muted);font-size:.9rem;text-align:center}
.btn{display:inline-block;padding:10px 14px;border-radius:8px;border:0;background:#fff;color:#06060a;font-weight:700;cursor:pointer;margin-top:10px}
.overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:linear-gradient(180deg, rgba(2,6,23,0.6), rgba(2,6,23,0.8));backdrop-filter:blur(4px);z-index:60}
.overlay.hidden{display:none}
.overlay .panel{background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));padding:22px;border-radius:12px;border:1px solid rgba(255,255,255,0.04);text-align:center}
.overlay h2{margin:0 0 8px;font-family:Orbitron,monospace}
.overlay .panel .btn{width:170px}
.credits{opacity:0.6;margin-top:18px}
/* Exit / Home button on game pages */
.exit-btn{position:absolute;left:12px;top:12px;z-index:80;padding:8px 10px;border-radius:8px;background:rgba(255,255,255,0.96);color:#06060a;text-decoration:none;font-weight:700;box-shadow:0 10px 30px rgba(2,6,23,0.6)}
.exit-btn:hover{transform:translateY(-3px)}
/* small screens */
@media (max-width:880px){
  .game-wrap{flex-direction:column;align-items:center}
  .panel-side{width:100%;max-width:420px}
  #playfield{max-width:320px}
}