:root{
  --bg:#0f1724;
  --card:#0b1220;
  --accent:#38bdf8;
  --text:#e6eef8;
}

*{box-sizing:border-box}
html,body{height:100%;margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,"Hiragino Kaku Gothic ProN",Meiryo,sans-serif;background:var(--bg);color:var(--text)}
.container{max-width:1100px;margin:28px auto;padding:20px;background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0));border-radius:12px;box-shadow:0 6px 30px rgba(0,0,0,0.6)}
h1{margin:0 0 12px 0;font-size:20px}
.controls{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-bottom:12px}
.controls label{font-size:14px;color:var(--text);display:flex;gap:6px;align-items:center}
.controls input[type="number"]{width:88px;padding:6px;border-radius:6px;border:1px solid rgba(255,255,255,0.06);background:rgba(255,255,255,0.02);color:var(--text)}
button{background:var(--accent);color:#022;padding:8px 12px;border-radius:8px;border:none;cursor:pointer;font-weight:600}
button:active{transform:translateY(1px)}
.canvas-wrap{display:flex;justify-content:center;align-items:center;padding:12px;background:rgba(255,255,255,0.01);border-radius:8px}
#mazeCanvas{background:#fff;border:2px solid rgba(255,255,255,0.04);max-width:100%}
.hint{margin-top:10px;color:rgba(230,238,248,0.7);font-size:13px}
@media (max-width:720px){
  .controls{gap:8px}
  .controls input[type="number"]{width:68px}
}