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

    body {
      font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      min-height: 100vh;
      padding: 2rem;
      position: relative;
      overflow-x: hidden;
    }

    body::before {
      content: '';
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
                  radial-gradient(circle at 80% 20%, rgba(255, 118, 117, 0.3) 0%, transparent 50%),
                  radial-gradient(circle at 40% 40%, rgba(120, 219, 226, 0.2) 0%, transparent 50%);
      pointer-events: none;
      z-index: -1;
    }

    .container {
      max-width: 900px;
      margin: 0 auto;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(20px);
      border: 1px solid rgba(255, 255, 255, 0.2);
      border-radius: 24px;
      padding: 3rem;
      box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
      position: relative;
      animation: slideUp 0.8s ease-out;
    }

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

    h1 {
      text-align: center;
      font-size: 2.5rem;
      font-weight: 700;
      background: linear-gradient(135deg, #667eea, #764ba2);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 2rem;
      position: relative;
    }

    h1::after {
      content: '';
      position: absolute;
      bottom: -10px;
      left: 50%;
      transform: translateX(-50%);
      width: 80px;
      height: 3px;
      background: linear-gradient(135deg, #667eea, #764ba2);
      border-radius: 2px;
    }

    .section {
      margin-bottom: 2rem;
      animation: fadeInUp 0.6s ease-out forwards;
      opacity: 0;
    }

    .section:nth-child(2) { animation-delay: 0.1s; }
    .section:nth-child(3) { animation-delay: 0.2s; }
    .section:nth-child(4) { animation-delay: 0.3s; }
    .section:nth-child(5) { animation-delay: 0.4s; }

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

    label {
      display: block;
      font-weight: 600;
      color: #374151;
      margin-bottom: 0.75rem;
      font-size: 1.1rem;
    }

    textarea {
      width: 100%;
      padding: 1.25rem;
      border: 2px solid #e5e7eb;
      border-radius: 16px;
      font-family: 'JetBrains Mono', 'Fira Code', monospace;
      font-size: 14px;
      line-height: 1.6;
      resize: vertical;
      transition: all 0.3s ease;
      background: rgba(255, 255, 255, 0.8);
      backdrop-filter: blur(10px);
    }

    textarea:focus {
      outline: none;
      border-color: #667eea;
      box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
      transform: translateY(-2px);
    }

    textarea::placeholder {
      color: #9ca3af;
    }

    .upload-section {
      display: flex;
      align-items: center;
      gap: 1rem;
      padding: 1.5rem;
      background: linear-gradient(135deg, #f8fafc, #f1f5f9);
      border: 2px dashed #cbd5e1;
      border-radius: 16px;
      transition: all 0.3s ease;
      cursor: pointer;
      position: relative;
      overflow: hidden;
    }

    .upload-section:hover {
      border-color: #667eea;
      background: linear-gradient(135deg, #f0f4ff, #e0e7ff);
      transform: translateY(-2px);
    }

    .upload-section::before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.1), transparent);
      transition: left 0.5s ease;
    }

    .upload-section:hover::before {
      left: 100%;
    }

    input[type="file"] {
      position: absolute;
      opacity: 0;
      width: 100%;
      height: 100%;
      cursor: pointer;
    }

    .upload-icon {
      width: 24px;
      height: 24px;
      color: #667eea;
    }

    .upload-text {
      font-weight: 500;
      color: #374151;
    }

    .button-group {
      display: flex;
      gap: 1rem;
    }

    .button-group button {
      flex: 1;
    }

    button {
      width: 100%;
      padding: 1rem 2rem;
      font-size: 1.1rem;
      font-weight: 600;
      border: none;
      border-radius: 16px;
      cursor: pointer;
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .generate-btn {
      background: linear-gradient(135deg, #667eea, #764ba2);
      color: white;
      margin: 1.5rem 0;
    }

    .generate-btn:hover {
      transform: translateY(-3px);
      box-shadow: 0 15px 35px rgba(102, 126, 234, 0.4);
    }

    .generate-btn:active {
      transform: translateY(-1px);
    }

    .save-btn {
      background: linear-gradient(135deg, #8b5cf6, #7c3aed);
      color: white;
      margin-top: 1rem;
    }

    .save-btn:hover {
      transform: translateY(-3px);
      box-shadow: 0 15px 35px rgba(139, 92, 246, 0.4);
    }

    .copy-btn {
      background: linear-gradient(135deg, #10b981, #059669);
      color: white;
      margin-top: 1rem;
    }

    .copy-btn:hover {
      transform: translateY(-3px);
      box-shadow: 0 15px 35px rgba(16, 185, 129, 0.4);
    }

    button::before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
      transition: left 0.5s ease;
    }

    button:hover::before {
      left: 100%;
    }

    .loading {
      position: relative;
    }

    .loading::after {
      content: '';
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 20px;
      height: 20px;
      border: 2px solid rgba(255, 255, 255, 0.3);
      border-top: 2px solid white;
      border-radius: 50%;
      animation: spin 1s linear infinite;
    }

    @keyframes spin {
      to { transform: translate(-50%, -50%) rotate(360deg); }
    }

    .notification {
      position: fixed;
      top: 2rem;
      right: 2rem;
      padding: 1rem 1.5rem;
      background: linear-gradient(135deg, #10b981, #059669);
      color: white;
      border-radius: 12px;
      font-weight: 500;
      transform: translateX(400px);
      transition: transform 0.3s ease;
      z-index: 1000;
      box-shadow: 0 10px 25px rgba(16, 185, 129, 0.3);
    }

    .notification.show {
      transform: translateX(0);
    }

      @media (max-width: 768px) {
      body {
        padding: 1rem;
      }
      
      .container {
        padding: 2rem;
      }
      
      h1 {
        font-size: 2rem;
      }
      
      .upload-section {
        flex-direction: column;
        text-align: center;
      }

      .button-group {
        flex-direction: column;
      }
    }