* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { width: 100%; height: 100%; overflow: hidden; background: #150a1e; font-family: 'Trebuchet MS', system-ui, sans-serif; }
#game { display: block; }

.hud {
  position: fixed; top: 0; left: 0; right: 0;
  padding: 16px 20px;
  display: flex; justify-content: space-between; align-items: flex-start;
  pointer-events: none; color: #fff;
  text-shadow: 0 2px 6px rgba(0,0,0,.7);
}
.pill {
  background: rgba(25,10,35,.55); backdrop-filter: blur(8px);
  border: 2px solid rgba(255,255,255,.15); border-radius: 14px;
  padding: 10px 16px; font-weight: bold; font-size: 18px;
  display: flex; align-items: center; gap: 8px;
}
.hud-left { display: flex; flex-direction: column; gap: 10px; align-items: flex-start; }
.hud-right { display: flex; flex-direction: column; gap: 10px; align-items: flex-end; }
.hearts { letter-spacing: 2px; font-size: 20px; }

.center-msg {
  position: fixed; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  color: #fff; text-align: center; gap: 14px; pointer-events: none;
  background: radial-gradient(ellipse at center, rgba(40,10,40,.35), rgba(10,5,20,.7));
}
.center-msg h1 { font-size: clamp(34px, 7vw, 64px); letter-spacing: 1px; text-shadow: 0 4px 0 #ff5a3a, 0 8px 18px rgba(0,0,0,.5); }
.center-msg p { font-size: 17px; opacity: .92; max-width: 480px; line-height: 1.5; }
.center-msg .btn {
  pointer-events: auto; cursor: pointer; margin-top: 6px;
  background: linear-gradient(180deg, #ffb14e, #f56523);
  color: #4a1a00; font-weight: bold; font-size: 18px;
  border: none; border-bottom: 4px solid #c44700;
  border-radius: 14px; padding: 14px 34px; transition: transform .08s;
}
.center-msg .btn:active { transform: translateY(3px); border-bottom-width: 1px; }
.center-msg input {
  pointer-events: auto; font-family: inherit; font-size: 18px; text-align: center;
  padding: 10px 14px; border-radius: 12px; border: 2px solid rgba(255,255,255,.3);
  background: rgba(0,0,0,.4); color: #fff; width: 220px; text-transform: uppercase;
}
.scores { font-size: 15px; line-height: 1.7; opacity: .95; }
.scores b { color: #ffd34e; }
.hidden { display: none !important; }
.diff { display: flex; gap: 12px; margin-top: 4px; }
.diffbtn {
  pointer-events: auto; cursor: pointer;
  background: rgba(0,0,0,.35); color: #fff;
  border: 2px solid rgba(255,255,255,.25); border-radius: 12px;
  font-family: inherit; font-weight: bold; font-size: 16px;
  padding: 10px 18px; transition: transform .08s, border-color .15s, background .15s;
}
.diffbtn:hover { background: rgba(255,255,255,.12); }
.diffbtn.selected { border-color: #ffd34e; background: rgba(255,180,40,.22); transform: translateY(-1px); }
.keys { font-size: 14px; opacity: .8; }
kbd { background: rgba(255,255,255,.18); border: 1px solid rgba(255,255,255,.3);
  border-radius: 6px; padding: 2px 8px; font-family: inherit; font-size: 13px; margin: 0 2px; }

.btns { position: fixed; right: 16px; bottom: 16px; display: flex; gap: 10px; }
.iconbtn {
  pointer-events: auto; cursor: pointer;
  background: rgba(25,10,35,.55); backdrop-filter: blur(8px);
  border: 2px solid rgba(255,255,255,.2); border-radius: 12px;
  color: #fff; font-weight: bold; font-size: 14px;
  padding: 10px 14px; transition: background .15s, transform .08s;
}
.iconbtn:hover { background: rgba(50,20,60,.8); }
.iconbtn:active { transform: translateY(2px); }