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

    body {
      font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
      background: linear-gradient(135deg, #FFE5B4 0%, #FFCCCB 100%);
      min-height: 100vh;
      padding: 20px;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    #app {
      width: 100%;
      max-width: 400px;
      text-align: center;
    }

    header {
      margin-bottom: 2rem;
    }

    h1 {
      font-size: 2.5rem;
      color: #D2691E;
      font-weight: 700;
      text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
    }

    main {
      display: flex;
      flex-direction: column;
      gap: 2rem;
    }

    .mango-display {
      display: flex;
      justify-content: center;
      align-items: center;
    }

    .mango-button {
      background: linear-gradient(145deg, #FFD700, #FFA500);
      border: none;
      border-radius: 50%;
      width: 150px;
      height: 150px;
      cursor: pointer;
      box-shadow: 0 8px 20px rgba(255, 165, 0, 0.3);
      transition: all 0.2s ease;
      position: relative;
      overflow: hidden;
    }

    .mango-button:active {
      transform: scale(0.95);
      box-shadow: 0 4px 10px rgba(255, 165, 0, 0.4);
    }

    .mango-button:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 25px rgba(255, 165, 0, 0.4);
    }

    .mango-emoji {
      font-size: 3rem;
      line-height: 1;
    }

    .mango-count {
      position: absolute;
      top: -10px;
      right: -10px;
      background: #FF6B6B;
      color: white;
      border-radius: 50%;
      width: 40px;
      height: 40px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      font-weight: bold;
      box-shadow: 0 2px 8px rgba(0,0,0,0.2);
    }

    .stats {
      display: flex;
      justify-content: space-around;
      gap: 1rem;
    }

    .stat {
      background: rgba(255, 255, 255, 0.8);
      border-radius: 15px;
      padding: 1rem;
      flex: 1;
      box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    }

    .stat-label {
      display: block;
      font-size: 0.9rem;
      color: #666;
      margin-bottom: 0.5rem;
    }

    .stat-value {
      font-size: 1.5rem;
      font-weight: bold;
      color: #D2691E;
    }

    .upgrades {
      margin-top: 1rem;
    }

    .upgrade-btn {
      width: 100%;
      background: linear-gradient(145deg, #4CAF50, #45a049);
      color: white;
      border: none;
      border-radius: 25px;
      padding: 1rem 2rem;
      font-size: 1.1rem;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.2s ease;
      box-shadow: 0 4px 15px rgba(76, 175, 80, 0.3);
    }

    .upgrade-btn:active {
      transform: scale(0.98);
      box-shadow: 0 2px 8px rgba(76, 175, 80, 0.4);
    }

    .upgrade-btn:disabled {
      background: #cccccc;
      cursor: not-allowed;
      box-shadow: none;
    }

    .upgrade-btn small {
      display: block;
      font-size: 0.8rem;
      opacity: 0.9;
      margin-top: 0.25rem;
    }

    @media (max-width: 480px) {
      body {
        padding: 15px;
      }
      
      h1 {
        font-size: 2rem;
      }
      
      .mango-button {
        width: 120px;
        height: 120px;
      }
      
      .mango-emoji {
        font-size: 2.5rem;
      }
      
      .mango-count {
        width: 35px;
        height: 35px;
        font-size: 1rem;
      }
    }