body {
  margin: 0;
  font-family: "Segoe UI", sans-serif;
  background: #f2f2f2;
  color: #222;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.container {
  background: #ffffff;
  padding: 30px;
  border-radius: 16px;
  text-align: center;
  width: 90%;
  max-width: 500px;
  box-shadow: 0 0 15px rgba(0, 0, 0, 0.1);
}

h1 {
  color: #0066cc;
  margin-bottom: 5px;
}

.upload-area {
  border: 2px dashed #0066cc;
  border-radius: 10px;
  padding: 40px 20px;
  margin: 20px 0;
  background-color: #f9f9f9;
  cursor: pointer;
  transition: background 0.3s;
}

.upload-area:hover {
  background-color: #eef6ff;
}

.browse-btn {
  color: #0066cc;
  text-decoration: underline;
  cursor: pointer;
}

select,
button {
  margin-top: 10px;
  padding: 10px;
  width: 100%;
  font-size: 1rem;
  border: none;
  border-radius: 6px;
}

select {
  background-color: #e0e0e0;
  color: #222;
}

button {
  background-color: #0066cc;
  color: #fff;
  font-weight: bold;
  transition: background 0.2s;
  margin-bottom: 10px;
}

button:hover {
  background-color: #004f99;
}

#statusMessage {
  margin-top: 10px;
  font-size: 0.95rem;
  color: #555;
}

.download-btn {
  display: inline-block;
  margin-top: 15px;
  padding: 10px 20px;
  background-color: #28a745;
  color: #fff;
  text-decoration: none;
  border-radius: 6px;
  font-weight: bold;
  transition: background 0.2s;
}

.download-btn:hover {
  background-color: #218838;
}