* { box-sizing: border-box; }
body {
  font-family: Arial, sans-serif;
  background: #f4f4f4;
  margin: 0;
  padding: 20px;
}
.container {
  max-width: 900px;
  margin: 0 auto;
  background: white;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
h1 { text-align: center; color: #333; }
p { color: #555; }

.dropzone {
  border: 3px dashed #ccc;
  border-radius: 10px;
  padding: 60px 20px;
  text-align: center;
  font-size: 18px;
  color: #777;
  cursor: pointer;
  transition: 0.3s;
  margin: 20px 0;
}
.dropzone:hover, .dropzone.dragover {
  border-color: #2196F3;
  background: #f0f8ff;
}
#fileInput { display: none; }

.pdf-item {
  margin: 15px 0;
  padding: 15px;
  border: 1px solid #eee;
  border-radius: 8px;
  background: #f9f9f9;
}
.pdf-preview p {
  margin: 0 0 10px;
  font-weight: bold;
}
.loading {
  font-size: 14px;
  color: #666;
}
.download-btn {
  display: inline-block;
  margin-top: 10px;
  padding: 8px 16px;
  background: #4CAF50;
  color: white;
  text-decoration: none;
  border-radius: 5px;
  font-size: 14px;
}
.download-btn:hover {
  background: #45a049;
}