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

    body {
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      min-height: 100vh;
      display: flex;
      justify-content: center;
      align-items: center;
      padding: 20px;
    }

    .game-container {
      background: white;
      border-radius: 20px;
      padding: 30px;
      box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
      max-width: 500px;
      width: 100%;
    }

    .game-header {
      text-align: center;
      margin-bottom: 20px;
    }

    h1 {
      color: #667eea;
      font-size: 2.5em;
      margin-bottom: 15px;
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
    }

    .score-board {
      display: flex;
      justify-content: space-around;
      background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
      padding: 15px;
      border-radius: 10px;
      color: white;
      font-weight: bold;
    }

    .score, .high-score {
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    .label {
      font-size: 0.9em;
      opacity: 0.9;
      margin-bottom: 5px;
    }

    #score, #highScore {
      font-size: 1.8em;
    }

    #gameCanvas {
      display: block;
      margin: 20px auto;
      background: #f0f0f0;
      border: 3px solid #667eea;
      border-radius: 10px;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
      width: 100%;
      max-width: 400px;
      height: auto;
    }

    .game-controls {
      display: flex;
      gap: 10px;
      justify-content: center;
      margin: 20px 0;
    }

    .btn {
      padding: 12px 24px;
      border: none;
      border-radius: 8px;
      font-size: 1em;
      font-weight: bold;
      cursor: pointer;
      transition: all 0.3s ease;
      text-transform: uppercase;
      letter-spacing: 1px;
    }

    .btn-primary {
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      color: white;
    }

    .btn-primary:hover:not(:disabled) {
      transform: translateY(-2px);
      box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
    }

    .btn-secondary {
      background: #e0e0e0;
      color: #333;
    }

    .btn-secondary:hover:not(:disabled) {
      background: #d0d0d0;
    }

    .btn:disabled {
      opacity: 0.5;
      cursor: not-allowed;
    }

    .instructions {
      background: #f8f9fa;
      padding: 20px;
      border-radius: 10px;
      margin-top: 20px;
    }

    .instructions h3 {
      color: #667eea;
      margin-bottom: 10px;
    }

    .instructions p {
      color: #666;
      margin: 8px 0;
      font-size: 0.95em;
    }

    .modal {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(0, 0, 0, 0.7);
      justify-content: center;
      align-items: center;
      z-index: 1000;
    }

    .modal.active {
      display: flex;
    }

    .modal-content {
      background: white;
      padding: 40px;
      border-radius: 20px;
      text-align: center;
      box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
      animation: slideIn 0.3s ease;
    }

    @keyframes slideIn {
      from {
        transform: translateY(-50px);
        opacity: 0;
      }
      to {
        transform: translateY(0);
        opacity: 1;
      }
    }

    .modal-content h2 {
      color: #f5576c;
      margin-bottom: 20px;
      font-size: 2em;
    }

    .modal-content p {
      font-size: 1.3em;
      color: #666;
      margin-bottom: 30px;
    }

    #finalScore {
      color: #667eea;
      font-weight: bold;
      font-size: 1.5em;
    }

    @media (max-width: 500px) {
      .game-container {
        padding: 20px;
      }

      h1 {
        font-size: 2em;
      }

      .game-controls {
        flex-direction: column;
      }

      .btn {
        width: 100%;
      }
    }