:root{
  --bg: #0f1724;
  --panel: #0b1220;
  --accent: #2dd4bf;
  --muted: #94a3b8;
  --hit: #ef4444;
  --miss: #94a3b8;
}
*{box-sizing:border-box}
body{
  margin:0;
  font-family:system-ui, -apple-system, Roboto, "Segoe UI", Helvetica, Arial;
  background:linear-gradient(180deg,var(--bg),#071025);
  color:#e6eef6;
  min-height:100vh;
  display:flex;
  align-items:center;
  justify-content:center;
}
main{
  width:520px;
  background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  border-radius:10px;
  padding:20px;
  box-shadow:0 10px 30px rgba(2,6,23,0.6);
}
h1{margin:0 0 6px 0; font-size:22px; letter-spacing:1px}
.subtitle{margin:0 0 16px 0; color:var(--muted)}
#status{display:flex;align-items:center;gap:12px;margin-bottom:12px}
#turn{font-weight:600}
#message{flex:1;color:var(--muted)}
.board{
  display:grid;
  grid-template-columns:repeat(5, 80px);
  grid-template-rows:repeat(5, 60px);
  gap:8px;
  justify-content:center;
  margin-bottom:14px;
}
.cell{
  background:var(--panel);
  border-radius:6px;
  display:flex;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  user-select:none;
  font-weight:700;
  color:#cfeff0;
  font-size:18px;
  transition:transform .08s ease, background .12s ease;
}
.cell:hover{transform:translateY(-3px)}
.cell.miss{background:rgba(255,255,255,0.03); color:var(--miss);}
.cell.hit{background:linear-gradient(90deg,#ff7b7b,#ff4040); color:white}
.cell.revealed{outline:2px dashed rgba(255,255,255,0.04)}
.controls{display:flex;justify-content:flex-end}
button{background:transparent;border:1px solid rgba(255,255,255,0.06);padding:8px 12px;border-radius:6px;color:var(--accent);cursor:pointer}
button:hover{background:rgba(255,255,255,0.02)}
footer{margin-top:12px;color:var(--muted);font-size:13px}