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

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

    .container {
      text-align: center;
    }

    .hello-text {
      font-size: 4rem;
      color: white;
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
      animation: fadeIn 1s ease-in;
    }

    @keyframes fadeIn {
      from {
        opacity: 0;
        transform: translateY(-20px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }