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

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

    .container {
      max-width: 1200px;
      margin: 0 auto;
    }

    h1 {
      color: white;
      text-align: center;
      margin-bottom: 30px;
      font-size: 2.5em;
      text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
    }

    .upload-section {
      background: white;
      border-radius: 12px;
      padding: 30px;
      margin-bottom: 30px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    }

    .file-input-wrapper {
      position: relative;
      display: inline-block;
      width: 100%;
    }

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

    .file-input-button {
      display: block;
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      color: white;
      padding: 15px 30px;
      border-radius: 8px;
      text-align: center;
      font-size: 16px;
      font-weight: 600;
      cursor: pointer;
      transition: transform 0.2s;
    }

    .file-input-button:hover {
      transform: translateY(-2px);
      box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    }

    .status {
      margin-top: 15px;
      padding: 10px;
      border-radius: 6px;
      text-align: center;
      font-weight: 500;
    }

    .status.loading {
      background: #fff3cd;
      color: #856404;
    }

    .status.success {
      background: #d4edda;
      color: #155724;
    }

    .status.error {
      background: #f8d7da;
      color: #721c24;
    }

    .preview-section {
      background: white;
      border-radius: 12px;
      padding: 30px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.3);
      display: none;
    }

    .preview-section.active {
      display: block;
    }

    .image-container {
      position: relative;
      width: 100%;
      display: inline-block;
      background: #f8f9fa;
      border-radius: 8px;
      overflow: hidden;
    }

    #inputImage {
      display: block;
      max-width: 100%;
      height: auto;
    }

    #overlay {
      position: absolute;
      top: 0;
      left: 0;
      pointer-events: none;
    }

    .legend {
      margin-top: 20px;
      padding: 15px;
      background: #f8f9fa;
      border-radius: 8px;
    }

    .legend h3 {
      margin-bottom: 10px;
      color: #333;
    }

    .legend-item {
      display: inline-block;
      margin-right: 20px;
      margin-bottom: 10px;
      padding: 5px 10px;
      border-radius: 4px;
      font-weight: 500;
      color: white;
    }

    .detection-count {
      margin-top: 15px;
      padding: 10px;
      background: #e7f3ff;
      border-left: 4px solid #2196F3;
      border-radius: 4px;
      font-weight: 500;
    }