:root{
  --bg:#111;
  --accent:#ef6c00;
  --muted:#ddd;
}
html,body{
  height:100%;
  margin:0;
  background:var(--bg);
  color:var(--muted);
  font-family:system-ui,-apple-system,Segoe UI,Roboto,"Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,Arial;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
#c{
  display:block;
  width:100vw;
  height:100vh;
  touch-action:manipulation;
}
#hud{
  position:fixed;
  left:12px;
  top:12px;
  display:flex;
  flex-direction:column;
  gap:8px;
  pointer-events:none;
  user-select:none;
}
#title{
  background:rgba(0,0,0,0.6);
  padding:10px 12px;
  border-radius:8px;
  font-weight:700;
  font-size:18px;
  color:#fff;
}
#score{
  background:rgba(0,0,0,0.5);
  padding:8px 10px;
  border-radius:8px;
  font-weight:600;
  color:var(--accent);
}
#message{
  background:rgba(255,255,255,0.04);
  padding:6px 10px;
  border-radius:8px;
  font-size:13px;
  color:#ccc;
}
#footer{
  position:fixed;
  bottom:12px;
  left:50%;
  transform:translateX(-50%);
  pointer-events:auto;
  user-select:none;
}
#footer a{
  display:inline-block;
  background:rgba(0,0,0,0.6);
  padding:8px 16px;
  border-radius:8px;
  color:#fff;
  text-decoration:none;
  font-size:14px;
  font-weight:500;
  transition:background 0.2s;
}
#footer a:hover{
  background:rgba(239,108,0,0.8);
}