body {
      background-color: #0f0f0f;
    }
    .fade-in {
      opacity: 0;
      transform: translateY(20px);
      animation: fadeIn 1.2s ease-out forwards;
    }
    @keyframes fadeIn {
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }
    .pulse-border {
      border: 3px solid #ff0000;
      animation: pulse 2s infinite;
    }
    @keyframes pulse {
      0%, 100% {
        box-shadow: 0 0 0 0 rgba(255, 0, 0, 0.7);
      }
      50% {
        box-shadow: 0 0 20px 5px rgba(255, 0, 0, 0.9);
      }
    }