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

  body {
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 20px;
  }

  .container {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-radius: 20px;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
      padding: 40px;
      max-width: 800px;
      width: 100%;
  }

  .title {
      text-align: center;
      font-size: 2.5em;
      font-weight: bold;
      color: #333;
      margin-bottom: 10px;
      background: linear-gradient(45deg, #667eea, #764ba2);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
  }

  .subtitle {
      text-align: center;
      color: #666;
      margin-bottom: 30px;
      font-size: 1.1em;
  }

  .compression-settings {
      background: #f8f9fa;
      border-radius: 10px;
      padding: 20px;
      margin-bottom: 30px;
  }

  .compression-settings h3 {
      margin-bottom: 15px;
      color: #333;
  }

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

  .setting-group label {
      display: block;
      margin-bottom: 5px;
      font-weight: 500;
      color: #555;
  }

  .compression-level {
      width: 100%;
      margin-bottom: 10px;
  }

  .algorithm-select {
      width: 100%;
      padding: 8px 12px;
      border: 1px solid #ddd;
      border-radius: 5px;
      font-size: 14px;
  }

  .drop-zones {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      margin-bottom: 30px;
  }

  .drop-zone {
      border: 3px dashed #ddd;
      border-radius: 15px;
      padding: 40px 20px;
      text-align: center;
      cursor: pointer;
      transition: all 0.3s ease;
      background: linear-gradient(45deg, #f8f9fa, #ffffff);
      position: relative;
      overflow: hidden;
  }

  .drop-zone:hover {
      border-color: #667eea;
      background: linear-gradient(45deg, #f0f2ff, #ffffff);
      transform: translateY(-2px);
  }

  .drop-zone.drag-over {
      border-color: #667eea;
      background: linear-gradient(45deg, #e8ebff, #f5f7ff);
      transform: scale(1.02);
  }

  .drop-zone.processing {
      border-color: #ffc107;
      background: linear-gradient(45deg, #fff8e1, #ffffff);
  }

  .drop-zone-icon {
      font-size: 3em;
      margin-bottom: 15px;
  }

  .drop-zone-text {
      font-size: 1.3em;
      font-weight: bold;
      color: #333;
      margin-bottom: 8px;
  }

  .drop-zone-subtitle {
      color: #666;
      font-size: 0.9em;
      margin-bottom: 20px;
  }

  .file-input {
      display: none;
  }

  .progress-bar {
      width: 100%;
      height: 6px;
      background: #e9ecef;
      border-radius: 3px;
      overflow: hidden;
      display: none;
      margin-top: 15px;
  }

  .progress-fill {
      height: 100%;
      background: linear-gradient(90deg, #667eea, #764ba2);
      width: 0%;
      transition: width 0.3s ease;
  }

  .status {
      text-align: center;
      padding: 15px;
      border-radius: 10px;
      margin-bottom: 20px;
      display: none;
      font-weight: 500;
  }

  .status.success {
      background: #d4edda;
      color: #155724;
      border: 1px solid #c3e6cb;
  }

  .status.error {
      background: #f8d7da;
      color: #721c24;
      border: 1px solid #f5c6cb;
  }

  .status.info {
      background: #d1ecf1;
      color: #0c5460;
      border: 1px solid #bee5eb;
  }

  .file-info {
      background: #f8f9fa;
      border-radius: 10px;
      padding: 20px;
      margin-bottom: 20px;
      display: none;
      line-height: 1.6;
  }

  .download-btn {
      background: linear-gradient(45deg, #667eea, #764ba2);
      color: white;
      border: none;
      padding: 15px 30px;
      border-radius: 10px;
      font-size: 1.1em;
      font-weight: bold;
      cursor: pointer;
      display: none;
      margin: 0 auto;
      transition: all 0.3s ease;
  }

  .download-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
  }

  @media (max-width: 768px) {
      .drop-zones {
          grid-template-columns: 1fr;
      }

      .container {
          padding: 20px;
      }

      .title {
          font-size: 2em;
      }
  }