* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  background: #060812;
  overflow: hidden;
  font-family: 'Segoe UI', system-ui, sans-serif;
}

canvas { display: block; }

#backBtn {
  position: fixed; top: 16px; left: 16px; z-index: 100;
  color: #556; font-size: 13px; text-decoration: none;
  letter-spacing: 2px; transition: color 0.2s;
}
#backBtn:hover { color: #aac; }

#startScreen {
  position: fixed; inset: 0; z-index: 50;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  background: rgba(6,8,18,0.95);
}
#startScreen h1 {
  font-size: 72px; font-weight: 800;
  letter-spacing: 12px;
  background: linear-gradient(135deg, #44ddff 0%, #ffffff 50%, #ff4466 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
}
#startScreen .sub {
  font-size: 16px; color: #667; letter-spacing: 4px;
  margin-bottom: 32px;
}
#startScreen .controls {
  font-size: 13px; color: #778; line-height: 2.2;
  text-align: center; margin-bottom: 36px;
}
.key {
  display: inline-block;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 4px;
  padding: 2px 10px;
  font-size: 14px;
  color: #aac;
  margin: 0 2px;
}
#playBtn, #multiBtn, #restartBtn {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  color: #dde; font-size: 16px;
  padding: 14px 48px; border-radius: 8px;
  cursor: pointer; letter-spacing: 4px;
  transition: all 0.25s;
}
#playBtn:hover, #multiBtn:hover, #restartBtn:hover {
  background: rgba(255,255,255,0.15);
  border-color: rgba(255,255,255,0.3);
  transform: translateY(-2px);
}

#endOverlay {
  position: fixed; inset: 0; z-index: 60;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  background: rgba(6,8,18,0.92);
}
#endOverlay.hidden { display: none; }
#endTitle {
  font-size: 52px; font-weight: 800;
  letter-spacing: 6px; margin-bottom: 16px;
}
#endTitle.win {
  background: linear-gradient(135deg, #44ddff, #44ff88);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
#endTitle.lose {
  background: linear-gradient(135deg, #ff4466, #ff8844);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
#endScore { font-size: 24px; color: #dde; margin-bottom: 8px; }
#endStats {
  font-size: 13px; color: #778; margin-bottom: 32px;
  letter-spacing: 1px; line-height: 2; text-align: center;
}