body {
  font-family: 'Arial', sans-serif;
  margin: 0;
  padding: 0;
  background: linear-gradient(to bottom, #4facfe, #00f2fe);
  color: #333;
}

header {
  text-align: center;
  padding: 20px;
  background: #fff;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

header h1 {
  margin: 0;
  font-size: 2rem;
}

header p {
  font-size: 1.1rem;
  color: #555;
}

.container {
  max-width: 600px;
  margin: 30px auto;
  background: #fff;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.form-group {
  margin-bottom: 15px;
}

label {
  display: block;
  margin-bottom: 5px;
  font-weight: bold;
}

input, select {
  width: 100%;
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 16px;
}

.btn {
  display: inline-block;
  width: 100%;
  padding: 10px;
  background-color: #28a745;
  color: white;
  font-size: 16px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  margin-top: 10px;
}

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

#result {
  margin-top: 20px;
  padding: 15px;
  background-color: #f8f9fa;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 18px;
  text-align: center;
}

footer {
  text-align: center;
  padding: 10px;
  background: #fff;
  color: #555;
  font-size: 14px;
  margin-top: 20px;