body {
  margin: 0;
  overflow: hidden;
  font-family: Arial, sans-serif;
}

#canvas-container {
  width: 100vw;
  height: 100vh;
}

#menu-screen {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(0, 0, 0, 0.95);
  color: white;
  padding: 40px 60px;
  border-radius: 15px;
  text-align: center;
  min-width: 400px;
  box-shadow: 0 0 30px rgba(255, 255, 255, 0.3);
}
#menu-screen h1 {
  font-size: 48px;
  margin: 0 0 10px 0;
  color: #4CAF50;
}
#menu-screen h2 {
  font-size: 24px;
  margin: 30px 0 20px 0;
  color: #2196F3;
}
#menu-group-id {
  font-weight: bold;
  margin-bottom: 10px;
}

#settings {
  margin: 20px 0;
}

.setting-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 15px 0;
  padding: 10px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 5px;
}

.setting-item label {
  font-size: 18px;
  margin-right: 20px;
}

.setting-item input,
.setting-item select {
  padding: 8px 15px;
  font-size: 16px;
  border: none;
  border-radius: 5px;
  background: white;
  color: black;
  min-width: 120px;
}

.setting-item input[type="number"] {
  text-align: center;
}

#start-button {
  margin-top: 30px;
  padding: 15px 40px;
  font-size: 20px;
  font-weight: bold;
}

#ui-overlay {
  position: absolute;
  top: 20px;
  left: 20px;
  color: white;
  font-size: 18px;
  background: rgba(0, 0, 0, 0.7);
  padding: 15px;
  border-radius: 8px;
}

#controls {
  position: absolute;
  top: 20px;
  right: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

#tower-selection {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
}

.tower-button {
  border: 2px solid #808080;
}

button {
  padding: 10px 20px;
  font-size: 16px;
  cursor: pointer;
  border-radius: 5px;
  border: none;
}

#continue-screen {
  position: absolute;
  top: 10%;
  left: 50%;
  transform: translate(-90%, -50%);
  background: rgba(0, 0, 0, 0.9);
  color: white;
  padding: 40px 60px;
  border-radius: 15px;
  text-align: center;
  font-size: 24px;
  display: none;
  box-shadow: 0 0 30px rgba(255, 255, 255, 0.3);
}

#game-over-screen {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(0, 0, 0, 0.9);
  color: white;
  padding: 40px 60px;
  border-radius: 15px;
  text-align: center;
  font-size: 24px;
  display: none;
  box-shadow: 0 0 30px rgba(255, 255, 255, 0.3);
}
#game-over-screen h1 {
  font-size: 48px;
  margin: 0 0 10px 0;
  color: #880808;
}
#game-over-buttons {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.highlighted {
  background-color: #007cff;
  color: white;
  border: 2px solid #0056b3;
}