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

    body {
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      background-color: #181818;
      font-family: 'Inter', sans-serif;
      color: #f3f4f6;
      text-align: center;
      padding: 2rem;
      overflow-x: hidden;
    }

    .fade-in {
      opacity: 0;
      transform: translateY(20px);
      visibility: hidden;
      animation: fadeInUp 1s ease-out forwards;
    }

    .fade-in.delay-1 { animation-delay: 0.2s; }
    .fade-in.delay-2 { animation-delay: 0.4s; }
    .fade-in.delay-3 { animation-delay: 0.6s; }
    .fade-in.delay-4 { animation-delay: 0.8s; }
    .fade-in.delay-5 { animation-delay: 1s; }

    @keyframes fadeInUp {
      to {
        opacity: 1;
        transform: translateY(0);
        visibility: visible;
      }
    }

    .avatar {
      width: 100px;
      height: auto;
      border-radius: 9999px;
      margin-bottom: 1rem;
      border: 2px solid #374151;
    }

    h1 {
      font-size: 2rem;
      font-weight: 600;
      margin-bottom: 0.25rem;
    }

    .author {
      color: #9ca3af;
      margin-bottom: 1.5rem;
      font-size: 0.9rem;
    }

    .description {
      font-size: 1rem;
      line-height: 1.6;
      color: #d1d5db;
      margin-bottom: 2rem;
      max-width: 500px;
    }

    .description span {
      font-weight: 600;
      color: #93c5fd;
    }

    .card {
      background: rgba(24, 24, 24, 0.7);
      padding: 2rem;
      border-radius: 1rem;
      border: 1px solid rgba(255, 255, 255, 0.15);
      backdrop-filter: blur(25px);
      -webkit-backdrop-filter: blur(25px);
      text-align: center;
      min-width: 280px;
      max-width: 90vw;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
    }

    .gpt-btn {
      display: inline-block;
      background: linear-gradient(145deg, #3d3d3d, #1f1f1f);
      color: #f9fafb;
      padding: 0.75rem 1rem;
      border-radius: 0.5rem;
      font-size: 1rem;
      font-weight: 600;
      text-decoration: none;
      box-shadow: 0 4px 20px rgba(255, 255, 255, 0.05);
      transition: all 0.3s ease;
      border: 1px solid rgba(255, 255, 255, 0.08);
      backdrop-filter: blur(4px);
      width: fit-content;
      margin: 0 auto 1rem auto;
    }

    .gpt-btn:hover {
      transform: scale(1.05);
      box-shadow: 0 8px 25px rgba(255, 255, 255, 0.1);
    }

    .card .donar-btn {
      display: inline-block;
      background-color: #009EE3;
      color: white;
      padding: 0.75rem 1.5rem;
      border-radius: 0.5rem;
      font-size: 1rem;
      font-weight: 600;
      text-decoration: none;
      box-shadow: 0 4px 15px rgba(0,158,227,0.3);
      transition: all 0.3s ease;
      margin: 0 auto;
      border: none;
    }

    .card .donar-btn:hover {
      background-color: #0077b6;
      transform: scale(1.05);
      box-shadow: 0 6px 20px rgba(0,158,227,0.4);
    }

    .footer {
      margin-top: 2rem;
      font-size: 0.9rem;
      color: #6b7280;
    }

    .card small {
      display: block;
      margin-top: 1rem;
      font-size: 0.85rem;
      color: #9ca3af;
    }

    @media screen and (max-width: 480px) {
      h1 {
        font-size: 1.5rem;
      }

      .description {
        font-size: 0.95rem;
      }

      .card {
        padding: 1.5rem;
      }

      .card .donar-btn {
        width: 100%;
      }
    }