/* Reset CSS */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  /* Body background */
  html {
    height: 100%;
  }
  
  body {
    height: 100%;
    margin: 0;
    background-color: #00bfff;
    background-size: 100% 150px;
    background-repeat: no-repeat;
    animation: wave 10s ease-in-out infinite;
  }
  
  @keyframes wave {
    0% {
      background-position: 0 0;
    }
    100% {
      background-position: 0 -135px;
    }
  }
    
  canvas#background {
    position: absolute;
    width: 100%;
    height: 100%;
    z-index: -1;
  }
  
  #gameboard {
    margin-top: 50px;
  }
  
  #wave {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 150px;
    z-index: -1;
  }
  
  .wave {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.1);
  }
  
  
  
  /* Gameboard styles */
  #gameboard {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    margin: 20px 0;
  }
  
  button {
    width: 100px;
    height: 100px;
    margin: 10px;
    border: none;
    border-radius: 50%;
    transition: transform 0.1s ease-in-out;
  }
  
  .red {
    background-color: #f44336;
  }
  
  .blue {
    background-color: #2196f3;
  }
  
  .green {
    background-color: #4caf50;
  }
  
  .yellow {
    background-color: #ffeb3b;
  }
  
  /* Button hover effect */
  button:hover {
    transform: scale(1.1);
  }
  
  /* Button press effect */
  button:active {
    transform: scale(0.9);
  }
  
  /* Control button styles */
  #controls {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 20px;
  }
  
  button#startButton,
  button#practiceButton {
    margin: 0 10px;
    padding: 10px;
    border: none;
    border-radius: 5px;
    background-color: #4caf50;
    color: white;
    font-size: 16px;
    font-weight: bold;
    text-transform: uppercase;
    cursor: pointer;
    transition: background-color 0.1s ease-in-out;
  }
  
  button#startButton:hover,
  button#practiceButton:hover {
    background-color: #2196f3;
  }
  
  button#startButton:active,
  button#practiceButton:active {
    transform: scale(0.95);
  }
  
  #instrumentPicker {
    margin: 0 10px;
    padding: 10px;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    font-weight: bold;
    text-transform: uppercase;
    cursor: pointer;
  }
  
  button#pianoButton,
  button#guitarButton,
  button#trumpetButton {
    margin: 0 10px;
    padding: 10px;
    border: none;
    border-radius: 5px;
    background-color: #2196f3;
    color: white;
    font-size: 16px;
    font-weight: bold;
    text-transform: uppercase;
    cursor: pointer;
    transition: background-color 0.1s ease-in-out;
  }
  
  button#pianoButton:hover,
  button#guitarButton:hover,
  button#trumpetButton:hover {
    background-color: #4caf50;
  }
  
  button#pianoButton:active,
  button#guitarButton:active,
  button#trumpetButton:active {
    transform: scale(0.95);
  }
  
  /* Info panel styles */
  #info {
    display: flex;
    justify-content: center;
    align-items: center;
  }
  
  #score,
  #timer {
    font-size: 24px;
    font-weight: bold;
    margin-right: 10px;
  }
  
  #message {
    font-size: 24px;
    font-weight: bold;
    color: #f44336;
  }