:root {
      font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial;
      color-scheme: light;
    }

    body {
      max-width: 920px;
      margin: 28px auto;
      padding: 20px;
      background: #fafafa;
      color: #111;
    }

    .card {
      background: #fff;
      border: 1px solid #eee;
      border-radius: 10px;
      padding: 24px;
      box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    }

    h1 {
      font-size: 22px;
      font-weight: 700;
      color: #222;
      border-bottom: 2px solid #4CAF50;
      padding-bottom: 8px;
      margin-bottom: 20px;
    }

    label {
      font-weight: 600;
      color: #333;
    }

    .file-item {
      background: #fff;
      border: 1px solid #ddd;
      padding: 10px 12px;
      margin-bottom: 6px;
      border-radius: 8px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: #111;
      flex-wrap: wrap;
      gap: 6px;
      font-size: 14px;
    }

    .file-item span:first-child {
      font-weight: 500;
    }

    .file-item span:last-child {
      font-weight: 600;
      color: #4CAF50;
    }

    .file-item a {
      background: #4CAF50;
      color: #fff;
      padding: 4px 10px;
      border-radius: 6px;
      text-decoration: none;
      font-size: 13px;
    }

    .file-item a:hover {
      background: #43a047;
    }

    .progress {
      height: 10px;
      background: #e0e0e0;
      border-radius: 6px;
      overflow: hidden;
    }

    .progress-bar {
      background: #4CAF50;
      transition: width 0.3s;
      font-size: 12px;
      font-weight: 600;
    }

    .btn {
      border-radius: 8px;
      font-weight: 600;
      border: 1px solid #ccc;
      background: #fff;
      color: #333;
      transition: all 0.2s ease;
    }

    .btn:hover {
      background: #f0f0f0;
    }

    .btn-start {
      background: #4CAF50;
      color: #fff;
      border: none;
    }

    .btn-start:hover {
      background: #43a047;
    }

    .btn-stop {
      background: #f44336;
      color: #fff;
      border: none;
    }

    .btn-stop:hover {
      background: #e53935;
    }

    .log-box {
      background: #f9f9f9;
      border: 1px solid #eee;
      color: #333;
      font-family: monospace;
      height: 250px;
      overflow-y: auto;
      padding: 10px;
      font-size: 13px;
      border-radius: 8px;
    }

    .log-success { color: #2e7d32; }
    .log-error { color: #c62828; }
    .log-warning { color: #f9a825; }
    .log-info { color: #555; }