:root{
  --bg:#0b1220;
  --panel:#0f172a;
  --card:rgba(15,23,42,.72);
  --border:rgba(255,255,255,.08);
  --text:#e5e7eb;
  --muted:#94a3b8;
  --accent1:#6366f1;
  --accent2:#8b5cf6;
  --accent3:#f59e0b;
  --glow:0 0 30px rgba(99,102,241,.35);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0; font-family:ui-sans-serif,system-ui,Segoe UI,Roboto,Inter,Arial;
  color:var(--text); background:var(--bg);
  background-image:
    radial-gradient(900px 400px at 10% -10%, rgba(99,102,241,.18), transparent),
    radial-gradient(900px 400px at 90% 0, rgba(245,158,11,.16), transparent);
}

.wrap{max-width:1100px;margin:0 auto;padding:16px;display:flex;flex-direction:column;gap:16px}

.topbar{
  display:flex;align-items:center;justify-content:space-between;
  background:linear-gradient(90deg,rgba(99,102,241,.25),rgba(139,92,246,.25));
  border:1px solid var(--border); padding:10px 12px; border-radius:16px; backdrop-filter:blur(6px)
}
.brand{display:flex;align-items:center;gap:12px}
.logo{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  background:rgba(255,255,255,.06);border:1px solid var(--border)
}
h1{margin:0;font-weight:800;letter-spacing:.02em}
h1 .accent{color:var(--accent3)}
h1 small{font-weight:600;color:var(--muted)}

.controls{display:flex;gap:8px}
.btn{
  background:linear-gradient(135deg,var(--accent1),var(--accent2));
  color:white;border:none;padding:8px 12px;border-radius:10px;font-weight:700;cursor:pointer;
  box-shadow:var(--glow); transition:filter .15s, transform .05s;
}
.btn:active{transform:translateY(1px)}
.btn-ghost{background:transparent;color:var(--text);border:1px solid var(--border)}
.btn-outline{background:transparent;border:1px solid var(--accent1);color:#c7d2fe}

.board-row{display:grid;grid-template-columns:220px 1fr 220px;gap:16px}
@media (max-width:980px){.board-row{grid-template-columns:1fr}}
.stage{
  position:relative;background:var(--panel);border:1px solid var(--border);border-radius:16px;display:grid;place-items:center; padding:16px;
}
#game{background:#0b1220;border-radius:8px;box-shadow:0 0 0 1px var(--border) inset, 0 0 30px rgba(0,0,0,.25)}
.panel{display:flex;flex-direction:column;gap:12px}
.card{
  background:var(--card); border:1px solid var(--border); border-radius:14px; padding:12px;
  backdrop-filter:blur(6px);
}
.card-title{font-size:12px;letter-spacing:.08em;color:var(--muted);text-transform:uppercase;margin-bottom:6px}
.metric{font-size:24px;font-weight:800}

.dim{color:var(--muted)}

.overlay{
  position:absolute; inset:0; display:grid; place-items:center; background:rgba(0,0,0,.5); backdrop-filter:blur(2px);
}
.overlay.hidden{display:none}
.overlay-inner{
  background:var(--card); border:1px solid var(--border); padding:20px; border-radius:16px; text-align:center; width:min(90vw,420px)
}
.overlay-inner h2{margin:.2em 0 .2em}
.overlay-actions{display:flex;gap:10px;justify-content:center;margin-top:10px}

.help{font-size:12px;color:var(--muted);display:flex;justify-content:center}
.keys{display:flex;gap:10px;flex-wrap:wrap}

#hold,#next{
  width:120px;height:auto;background:#0b1220;border-radius:8px;border:1px solid var(--border);
  box-shadow:0 0 0 1px var(--border) inset;
}

/* Mobile controls */
.mobile-ctrls{
  position:fixed;left:50%;transform:translateX(-50%);bottom:14px;display:flex;gap:8px;z-index:10;
}
.mobile-ctrls button{
  width:58px;height:58px;border-radius:16px;border:1px solid var(--border);
  background:rgba(255,255,255,.08); color:#fff; font-weight:900; font-size:18px;
  backdrop-filter:blur(4px)
}
@media (min-width:900px){.mobile-ctrls{display:none}}

canvas{image-rendering:pixelated}

/* Prevent touch scrolling on the game area */
.stage, .mobile-ctrls, body{touch-action:none}