:root { color-scheme: light dark; }
    body {
      font-family: 'Segoe UI', sans-serif;
      max-width: 480px;
      margin: auto;
      padding: 24px;
      background: transparent;
      color: inherit;
    }
    .file-box {
      border: 2px dashed #8884;
      border-radius: 10px;
      padding: 30px;
      text-align: center;
      cursor: pointer;
      transition: 0.3s ease;
      margin-bottom: 16px;
    }
    .file-box:hover { background: #2222; }
    .file-box input { display: none; }
    .file-box label {
      cursor: pointer;
      font-weight: bold;
      font-size: 16px;
      display: inline-block;
    }
    .file-name {
      margin-top: 12px;
      font-size: 14px;
      color: #ccc;
      text-align: left;
      list-style: none;
      padding-left: 0;
    }
    .file-name li {
      margin-bottom: 4px;
      display: flex;
      align-items: center;
    }
    .file-name i {
      margin-right: 8px;
      flex-shrink: 0;
    }
    .file-name .name {
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
      display: inline-block;
      width: 100%;
    }
    .progress {
      background: #3333;
      height: 24px;
      border-radius: 6px;
      overflow: hidden;
      margin-top: 12px;
    }
    .bar {
      height: 100%;
      width: 0%;
      background: #4ade80;
      color: #000;
      text-align: center;
      line-height: 24px;
      font-weight: bold;
      transition: width 0.3s ease;
    }
    .result {
      display: none;
      margin-top: 16px;
      padding: 12px;
      background: #1c1c1c;
      border-left: 5px solid #4ade80;
      border-radius: 6px;
      font-weight: 500;
      color: #4ade80;
    }
    .btn-copy {
      margin-top: 8px;
      padding: 10px 14px;
      width: 100%;
      border-radius: 10px;
      border: none;
      color: #fff;
      font-weight: 600;
      font-size: 15px;
      text-align: left;
      display: flex;
      align-items: center;
      gap: 12px;
      box-shadow: 0 6px 14px #0003;
      transition: transform 0.15s ease;
    }
    .btn-copy:active {
      transform: scale(0.96);
    }
    .btn-copy.page { background: #6366f1; }
    .btn-copy.direct { background: #10b981; }
    .btn-copy.qr { background: #f97316; }
    button.upload {
      background: linear-gradient(to right, #facc15, #fbbf24);
      color: #000;
      font-weight: 600;
      font-size: 16px;
      border: none;
      border-radius: 10px;
      padding: 12px;
      width: 100%;
      margin-top: 16px;
      transition: 0.2s ease;
      box-shadow: 0 6px 14px #0002;
    }
    button.upload:active {
      transform: scale(0.96);
    }
    button.upload:disabled { opacity: 0.6; cursor: not-allowed; }
    #popup {
      display: none;
      position: fixed;
      top: 20px;
      left: 50%;
      transform: translateX(-50%);
      background: rgba(34, 197, 94, 0.95);
      color: white;
      padding: 14px 28px;
      border-radius: 12px;
      z-index: 999;
      font-size: 15px;
      box-shadow: 0 6px 20px rgba(0,0,0,0.2);
      backdrop-filter: blur(5px);
      align-items: center;
      gap: 10px;
    }