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

    body {
      font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      align-items: center;
      padding: 20px;
    }

    .container {
      background: white;
      border-radius: 24px;
      padding: 40px;
      max-width: 600px;
      width: 100%;
      margin: auto;
      box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
      animation: slideUp 0.6s ease;
    }

    @keyframes slideUp {
      from {
        opacity: 0;
        transform: translateY(30px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    .header {
      text-align: center;
      margin-bottom: 30px;
    }

    .header h1 {
      color: #FF6B9D;
      font-size: 32px;
      margin-bottom: 10px;
    }

    .header p {
      color: #666;
      font-size: 16px;
    }

    .pet-info {
      background: linear-gradient(135deg, #FFF5F7 0%, #E8FFF9 100%);
      padding: 25px;
      border-radius: 16px;
      margin-bottom: 30px;
      border-left: 5px solid #4ECDC4;
    }

    .pet-photo {
      width: 150px;
      height: 150px;
      border-radius: 50%;
      object-fit: cover;
      border: 5px solid white;
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
      margin: 0 auto 20px;
      display: block;
    }

    .pet-name {
      font-size: 28px;
      font-weight: 700;
      color: #2D3142;
      text-align: center;
      margin-bottom: 8px;
    }

    .pet-details {
      text-align: center;
      color: #666;
      font-size: 16px;
    }

    .section {
      margin-bottom: 25px;
    }

    .section-title {
      font-size: 18px;
      font-weight: 700;
      color: #2D3142;
      margin-bottom: 15px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .input-group {
      margin-bottom: 15px;
    }

    .input-group label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      color: #555;
      margin-bottom: 8px;
    }

    .input-group input,
    .input-group textarea,
    .input-group select {
      width: 100%;
      padding: 12px 16px;
      border: 2px solid #E5E5E5;
      border-radius: 12px;
      font-size: 16px;
      transition: all 0.3s ease;
      font-family: inherit;
      color: #2D3142;
      background-color: #fff;
    }

    /* Dropdowns modernos: quita el look nativo y añade flecha propia */
    .input-group select {
      -webkit-appearance: none;
      -moz-appearance: none;
      appearance: none;
      cursor: pointer;
      padding-right: 44px;
      background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%234ECDC4' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
      background-repeat: no-repeat;
      background-position: right 16px center;
    }

    .input-group input:focus,
    .input-group textarea:focus,
    .input-group select:focus {
      outline: none;
      border-color: #4ECDC4;
      box-shadow: 0 0 0 3px rgba(78, 205, 196, 0.1);
    }

    .input-group input:disabled,
    .input-group select:disabled {
      background-color: #F4F5F7;
      color: #9AA0A6;
      cursor: not-allowed;
    }

    .input-group textarea {
      min-height: 100px;
      resize: vertical;
    }

    .btn {
      width: 100%;
      padding: 16px;
      border: none;
      border-radius: 12px;
      font-size: 18px;
      font-weight: 700;
      cursor: pointer;
      transition: all 0.3s ease;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      margin-bottom: 12px;
    }

    .btn-primary {
      background: linear-gradient(135deg, #4ECDC4, #44A08D);
      color: white;
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 25px rgba(78, 205, 196, 0.3);
    }

    .btn-secondary {
      background: linear-gradient(135deg, #FFE66D, #FF8C42);
      color: white;
    }

    .btn-secondary:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 25px rgba(255, 140, 66, 0.3);
    }

    .btn:disabled {
      opacity: 0.5;
      cursor: not-allowed;
      transform: none !important;
    }

    .loading {
      display: none;
      text-align: center;
      padding: 20px;
      color: #4ECDC4;
      font-weight: 600;
    }

    .loading.active {
      display: block;
    }

    .spinner {
      display: inline-block;
      width: 20px;
      height: 20px;
      border: 3px solid rgba(78, 205, 196, 0.3);
      border-top-color: #4ECDC4;
      border-radius: 50%;
      animation: spin 1s linear infinite;
    }

    @keyframes spin {
      to { transform: rotate(360deg); }
    }

    .success-message {
      display: none;
      background: linear-gradient(135deg, rgba(78, 205, 196, 0.1), rgba(68, 160, 141, 0.1));
      padding: 20px;
      border-radius: 16px;
      border-left: 5px solid #4ECDC4;
      margin-bottom: 20px;
    }

    .success-message.active {
      display: block;
      animation: slideUp 0.5s ease;
    }

    .success-message h3 {
      color: #4ECDC4;
      font-size: 20px;
      margin-bottom: 10px;
    }

    .success-message p {
      color: #666;
      line-height: 1.6;
    }

    .info-box {
      background: #F8F9FA;
      padding: 15px;
      border-radius: 12px;
      font-size: 14px;
      color: #666;
      margin-top: 20px;
      line-height: 1.6;
    }

    @media (max-width: 600px) {
      .container {
        padding: 25px;
      }

      .header h1 {
        font-size: 26px;
      }

      .pet-name {
        font-size: 24px;
      }
    }