body {
  font-family: system-ui, sans-serif;
  background: #f4f6f8;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  margin: 0;
}

.container {
  background: white;
  padding: 30px 40px;
  border-radius: 12px;
  box-shadow: 0 5px 30px rgba(0,0,0,0.05);
  max-width: 450px;
  width: 90%;
  text-align: center;
}

.drop-zone {
  border: 2px dashed #bbb;
  padding: 30px;
  cursor: pointer;
  margin: 20px 0;
  border-radius: 10px;
  background-color: #f9f9f9;
  transition: background 0.2s ease;
}

.drop-zone.dragover {
  background-color: #e0f0ff;
}

select {
  width: 100%;
  padding: 10px;
  margin: 10px 0 20px;
  font-size: 16px;
  border-radius: 5px;
  border: 1px solid #ccc;
}

a#downloadLink {
  display: inline-block;
  margin-top: 15px;
  padding: 10px 15px;
  background: #28a745;
  color: white;
  text-decoration: none;
  border-radius: 5px;
}

a#downloadLink:hover {
  background: #218838;
}

#previewImage {
  max-width: 100%;
  max-height: 150px;
  margin-top: 10px;
  border-radius: 6px;
  object-fit: contain;
  box-shadow: 0 0 10px rgba(0,0,0,0.05);
}