body {
    font-family: 'Helvetica', sans-serif;
    background-color: #f5f5f5;
    margin: 0;
    padding: 0;
  }
  
  .container {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
  }
  
  .transaction-container {
    width: 400px;
    padding: 40px;
    background-color: #ffffff;
    border-radius: 10px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
    text-align: center;
    position: relative;
    opacity: 0;
    transform: translateY(20px);
    animation: fade-in 0.5s ease-out forwards;
  }
  
  @keyframes fade-in {
    0% {
      opacity: 0;
      transform: translateY(20px);
    }
    100% {
      opacity: 1;
      transform: translateY(0);
    }
  }
  
  .circle {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background-color: #ff4c5a;
    position: absolute;
    top: -50px;
    left: calc(50% - 50px);
    animation: scale 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
  }
  
  @keyframes scale {
    0% {
      transform: scale(0);
    }
    80% {
      transform: scale(1.2);
    }
    100% {
      transform: scale(1);
    }
  }
  
  .thank-you {
    font-size: 36px;
    color: #333333;
    margin-bottom: 20px;
    opacity: 0;
    transform: translateY(10px);
    animation: fade-in-text 0.5s ease-out forwards 0.3s;
  }
  
  @keyframes fade-in-text {
    0% {
      opacity: 0;
      transform: translateY(10px);
    }
    100% {
      opacity: 1;
      transform: translateY(0);
    }
  }
  
  .message {
    font-size: 18px;
    color: #555555;
    margin-bottom: 15px;
    opacity: 0;
    transform: translateY(10px);
    animation: fade-in-text 0.5s ease-out forwards 0.5s;
  }
  
  .additional-message {
    font-size: 18px;
    color: #999999;
    opacity: 0;
    transform: translateY(10px);
    animation: fade-in-text 0.5s ease-out forwards 0.7s;
  }
  
  .btn {
    display: inline-block;
    padding: 12px 24px;
    background-color: #ff4c5a;
    color: #ffffff;
    font-size: 18px;
    text-decoration: none;
    border-radius: 6px;
    transition: background-color 0.3s;
    opacity: 0;
    transform: translateY(10px);
    animation: fade-in-text 0.5s ease-out forwards 0.9s;
  }
  
  .btn:hover {
    background-color: #ff6579;
  }