body {
  font-family: Arial, sans-serif;
  background: #f9f9f9;
  margin: 0;
  padding: 0;
}
header {
  background: #007bff;
  color: white;
  padding: 15px;
  text-align: center;
  font-size: 20px;
  font-weight: bold;
}
.container {
  max-width: 1000px;
  margin: 20px auto;
  padding: 15px;
  text-align: center;
}
.upload-box {
  border: 2px dashed #bbb;
  border-radius: 10px;
  padding: 40px;
  background: #fff;
  cursor: pointer;
  color: #666;
  margin-bottom: 20px;
}
.upload-box.dragover {
  border-color: #007bff;
  background: #f0f8ff;
}
button {
  padding: 10px 20px;
  margin: 5px;
  border: none;
  border-radius: 8px;
  font-weight: bold;
  cursor: pointer;
}
.btn-upload { background: #007bff; color: #fff; }
.btn-clear { background: #dc3545; color: #fff; }
.file-card {
  background: #fff;
  border-radius: 10px;
  padding: 15px;
  margin: 15px auto;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
  max-width: 600px;
  text-align: center;
}
.file-card img {
  max-width: 100%;
  border-radius: 8px;
  margin: 10px 0;
}
.stats {
  display: flex;
  justify-content: space-between;
  font-size: 14px;
  margin-top: 10px;
  color: #444;
}
.percent {
  font-size: 24px;
  font-weight: bold;
  color: green;
}
.download-btn {
  display: block;
  margin: 10px auto 0;
  padding: 12px 25px;
  background: #007bff;
  color: #fff;
  font-size: 15px;
  font-weight: bold;
  text-align: center;
  border-radius: 8px;
  text-decoration: none;
  width: fit-content;
  transition: 0.3s;
}
.download-btn:hover { background: #0056b3; }
.download-btn.original {
  background: #6c757d;
}
.download-btn.original:hover {
  background: #5a6268;
}
#preview {
  max-height: 500px;
  overflow-y: auto;
  padding-right: 10px;
}
#preview::-webkit-scrollbar {
  width: 8px;
}
#preview::-webkit-scrollbar-track {
  background: #f1f1f1;
  border-radius: 10px;
}
#preview::-webkit-scrollbar-thumb {
  background: #007bff;
  border-radius: 10px;
}
#preview::-webkit-scrollbar-thumb:hover {
  background: #0056b3;
}
footer {
  margin-top: 40px;
  padding: 15px;
  background: #f1f1f1;
  text-align: center;
  font-size: 14px;
  color: #555;
}