@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
  }
  
  @keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-4px); }
    75% { transform: translateX(4px); }
  }
  
  @keyframes slideInRight {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
  }
  
  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
  }
  
  .energy-low { animation: pulse 2s infinite; }
  .shake { animation: shake 0.3s ease-in-out; }
  .energy-flash { animation: pulse 0.3s ease-in-out; }
  .fade-in { animation: fadeIn 0.3s ease-out; }