* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Segoe UI', sans-serif;
  background: linear-gradient(to right, #00c6ff, #0072ff);
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.container {
  background: #fff;
  padding: 40px;
  border-radius: 16px;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
  text-align: center;
  width: 90%;
  max-width: 400px;
}

h1 {
  color: #333;
  margin-bottom: 25px;
  font-size: 26px;
}

.file-label {
  display: inline-block;
  background-color: #f0f0f0;
  border: 2px dashed #ccc;
  padding: 15px 20px;
  border-radius: 12px;
  cursor: pointer;
  color: #444;
  font-weight: bold;
  transition: background-color 0.3s;
  margin-bottom: 20px;
}

.file-label:hover {
  background-color: #e6e6e6;
}

.file-label input[type="file"] {
  display: none;
}

.convert-btn {
  background: #007bff;
  color: white;
  border: none;
  padding: 12px 25px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 16px;
  transition: background 0.3s, transform 0.2s;
  margin-bottom: 20px;
}

.convert-btn:hover {
  background: #0056b3;
  transform: scale(1.05);
}

.download-link {
  display: inline-block;
  margin-top: 10px;
  padding: 10px 20px;
  background-color: #28a745;
  color: white;
  font-weight: bold;
  text-decoration: none;
  border-radius: 8px;
  transition: background 0.3s, transform 0.2s;
}

.download-link:hover {
  background-color: #218838;
  transform: translateY(-2px);
}