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

body {
  background: #1a1a2e;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  overflow: hidden;
}

#game-container {
  border: 2px solid #16213e;
  border-radius: 4px;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
}

#math-input {
  position: absolute;
  z-index: 10;
  font-size: 24px;
  padding: 8px 12px;
  width: 200px;
  text-align: center;
  border: 2px solid #4a9eff;
  border-radius: 6px;
  background: #1a1a2e;
  color: #fff;
  outline: none;
  font-family: monospace;
}

#math-input:focus {
  border-color: #6cb4ff;
  box-shadow: 0 0 10px rgba(74, 158, 255, 0.3);
}

#boss-math-input {
  position: absolute;
  z-index: 10;
  font-size: 24px;
  padding: 8px 12px;
  text-align: center;
  border: 2px solid #4a9eff;
  border-radius: 6px;
  background: #1a1a2e;
  color: #fff;
  outline: none;
  font-family: monospace;
}

#boss-math-input:focus {
  border-color: #6cb4ff;
  box-shadow: 0 0 10px rgba(74, 158, 255, 0.3);
}

#join-room-input:focus {
  border-color: #ffbb44;
  box-shadow: 0 0 10px rgba(255, 153, 68, 0.3);
}