body {
  font-family: "Segoe UI", sans-serif;
  background-color: #f4f4f4;
  margin: 0;
  padding: 2rem;
}

.container {
  max-width: 500px;
  margin: auto;
  background: #fff;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 0 12px rgba(0, 0, 0, 0.1);
}

h1 {
  text-align: center;
  margin-bottom: 1.5rem;
  color: #333;
}

label {
  display: block;
  margin: 1rem 0 0.5rem;
  font-weight: bold;
  color: #333;
}

input[type="number"],
select {
  width: 100%;
  padding: 0.5rem;
  font-size: 1rem;
  border-radius: 6px;
  border: 1px solid #ccc;
}

button {
  width: 100%;
  margin-top: 1.5rem;
  padding: 0.75rem;
  font-size: 1.1rem;
  background-color: #2196f3;
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.3s ease;
}

button:hover {
  background-color: #1976d2;
}

#result {
  margin-top: 1.5rem;
  font-size: 1rem;
}

.language-switch {
  margin-top: 2rem;
  text-align: center;
}

.language-switch button {
  margin: 0 0.5rem;
  padding: 0.5rem 1rem;
  font-weight: bold;
  background-color: #eeeeee;
  color: #333;
  border: 1px solid #ccc;
  border-radius: 6px;
}

.language-switch button:hover {
  background-color: #ddd;
}