* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    background: linear-gradient(45deg, #000000, #1a1a1a, #2d2d2d, #000000);
    background-size: 400% 400%;
    animation: gradientFlow 8s ease infinite;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100vh;
    overflow: hidden;
    gap: 20px;
  }

  @keyframes gradientFlow {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
  }
  
  #tetris {
    display: flex;
    gap: 20px;
    padding: 20px;
    border: 1px solid black;
    background: #fff;
  }
  
  #canvas {
    width: 200px;
    height: 440px;
    background-color: #000;
    border: 2px solid #fff;
  }
  
  #info {
    background-color: #000;
    color: #fff;
    width: 130px;
    height: 440px;
    padding: 10px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    border: 2px solid #fff;
  }

  #game-title {
    font-size: 2.5rem;
    font-weight: bold;
    text-align: center;
    margin: 0;
    color: #333;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    letter-spacing: 2px;
  }
  
  #next_shape {
    width: 110px;
    height: 110px;
    background-color: #000;
    border: 1px solid white;
  }
  
  #next_shape canvas {
    display: block;
  }
  
  #high-scores {
    color: #fff;
    font-size: 14px;
  }
  
  #high-scores-list {
    list-style: none;
    margin-top: 5px;
  }
  
  #high-scores-list li {
    margin-bottom: 5px;
  }
  
  #start, #reset, #settings {
    background: #e1ff5f;
    border-radius: 2px;
    color: #202020;
    cursor: pointer;
    font-size: 20px;
    border: none;
    padding: 5px;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
  }

  #settings {
    margin-top: 10px;
  }

  #start:hover, #reset:hover, #settings:hover {
    background: #d4f542;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3), 0 0 15px rgba(225, 255, 95, 0.4);
    transform: translateY(-1px);
  }

  #start:active, #reset:active, #settings:active {
    background: #c7e83a;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.4), 0 0 20px rgba(225, 255, 95, 0.6);
    transform: translateY(0px);
  }
  
  .red {
    color: #f00000;
  }
  
  /* Game over/pause overlay */
  #canvas.paused::after, #canvas.game-over::after {
    content: "PAUSED";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #fff;
    font-size: 30px;
    font-family: Arial, sans-serif;
  }
  
  #canvas.game-over::after {
    content: "GAME OVER";
  }
  
  /* Settings Modal */
  .modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
  }
  
  .modal-content {
    background: #fff;
    padding: 20px;
    border-radius: 5px;
    width: 300px;
    display: flex;
    flex-direction: column;
    gap: 10px;
  }
  
  .modal-content h2 {
    margin-bottom: 10px;
  }
  
  .modal-content label {
    margin-right: 10px;
  }
  
  .modal-content input, .modal-content button {
    padding: 5px;
    margin-bottom: 10px;
  }
  
  .key-binding {
    display: flex;
    align-items: center;
    gap: 10px;
  }
  
  .key-btn {
    background: #ddd;
    border: 1px solid #999;
    padding: 5px 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  }
  
  .key-btn:hover {
    background: #bbb;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2), 0 0 10px rgba(187, 187, 187, 0.3);
    transform: translateY(-1px);
  }

  .key-btn:active {
    background: #aaa;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    transform: translateY(0px);
  }
  
  #save-settings, #close-settings {
    background: #e1ff5f;
    border: none;
    padding: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
  }

  #save-settings:hover, #close-settings:hover {
    background: #d4f542;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3), 0 0 15px rgba(225, 255, 95, 0.4);
    transform: translateY(-1px);
  }

  #save-settings:active, #close-settings:active {
    background: #c7e83a;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.4), 0 0 20px rgba(225, 255, 95, 0.6);
    transform: translateY(0px);
  }

  #game-over-overlay button {
    padding: 10px 30px;
    border: none;
    border-radius: 5px;
    background: #fff;
    color: #333;
    cursor: pointer;
    font-weight: bold;
    transition: background 0.2s;
  }
  #game-over-overlay button:hover {
    background: #f0f0f0;
  }

#reset-settings {
  background: #e1ff5f;
  border-radius: 2px;
  color: #202020;
  cursor: pointer;
  font-size: 18px;
  border: none;
  padding: 10px;
  width: 100%;
  margin: 0 0 10px 0;
  transition: all 0.3s ease;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
  display: block;
  text-align: center;
  font-family: inherit;
  font-weight: normal;
}
#reset-settings:hover {
  background: #d4f542;
}
#reset-settings:active {
  background: #c7e83a;
}