body {
      font-family: 'Arial', sans-serif;
      margin: 0;
      padding: 0;
      background: linear-gradient(135deg, #ffb3ba, #bae1ff);
      overflow-x: hidden;
      position: relative;
      min-height: 100vh;
      display: flex;
      justify-content: center;
      align-items: center;
    }

    .hearts {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      pointer-events: none;
      overflow: hidden;
    }

    .heart {
      position: absolute;
      color: #ff69b4;
      font-size: 24px;
      animation: float 6s linear infinite;
      opacity: 0.7;
    }

    @keyframes float {
      0% { transform: translateY(100vh) rotate(0deg); opacity: 0; }
      10% { opacity: 1; }
      90% { opacity: 1; }
      100% { transform: translateY(-100px) rotate(360deg); opacity: 0; }
    }

    .card {
      background: rgba(255, 255, 255, 0.25);
      backdrop-filter: blur(10px);
      border-radius: 20px;
      box-shadow: 0 8px 32px rgba(31, 38, 135, 0.37);
      padding: 40px;
      max-width: 600px;
      width: 90%;
      text-align: center;
      position: relative;
      z-index: 1;
    }

    .section {
      display: none;
    }

    .section.active {
      display: block;
      animation: fadeInUp 1s ease;
    }

    @keyframes fadeInUp {
      from { opacity: 0; transform: translateY(50px); }
      to { opacity: 1; transform: translateY(0); }
    }

    h1, h2 {
      color: #333;
      margin-bottom: 20px;
    }

    p {
      color: #555;
      margin-bottom: 20px;
    }

    button {
      background: linear-gradient(45deg, #ff6b6b, #ffa500);
      color: white;
      border: none;
      padding: 15px 30px;
      border-radius: 25px;
      font-size: 18px;
      cursor: pointer;
      margin: 10px;
    }

    button:hover {
      transform: scale(1.05);
    }

    input {
      width: 100%;
      padding: 10px;
      margin: 10px 0;
      border-radius: 10px;
      border: 2px solid #ddd;
    }

    .gift-img {
      max-width: 100%;
      border-radius: 15px;
      margin: 20px 0;
    }

    .popup {
      position: fixed;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      background: rgba(255, 255, 255, 0.95);
      padding: 30px;
      border-radius: 15px;
      box-shadow: 0 0 20px rgba(0,0,0,0.3);
      z-index: 1000;
      display: none;
    }

    @media (max-width: 768px) {
      .card {
        padding: 20px;
        width: 95%;
      }
      button {
        padding: 12px 24px;
        font-size: 16px;
        width: 100%;
      }
      input {
        font-size: 16px;
      }
      h1, h2 {
        font-size: 20px;
      }
      .popup {
        width: 90%;
        padding: 20px;
      }
      .heart {
        font-size: 18px;
      }
    }