body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #d3cce3, #e9e4f0);
  margin: 0;
  padding: 0;
}

.container {
  max-width: 500px;
  margin: 80px auto;
  background-color: #f0f4f8;
  padding: 40px;
  border-radius: 15px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
  text-align: center;
}

h1 {
  margin-bottom: 10px;
  color: #333;
}

.subtitle {
  margin-bottom: 30px;
  color: #555;
}

input[type="file"] {
  margin: 20px 0;
  display: block;
  width: 100%;
  padding: 10px;
  border: 2px dashed #bbb;
  border-radius: 10px;
  background: #fafafa;
  cursor: pointer;
}

button {
  background-color: #007bff;
  color: white;
  border: none;
  padding: 12px 24px;
  font-size: 16px;
  border-radius: 8px;
  cursor: pointer;
}

#loading {
  margin-top: 20px;
  color: #333;
}

#result {
  margin-top: 30px;
  font-size: 18px;
  font-weight: bold;
  color: #2c3e50;
}

.hidden {
  display: none;
}