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

body {
  display: flex;
  justify-content: center;
  align-items: center;
  background: linear-gradient(to right, #2C5364, #203A43, #0F2027);
  min-height: 100vh;
  font-family: Arial, sans-serif;
  padding: 1rem;
}

.calculator {
  background-color: #f5f5f5;
  padding: 2rem;
  border-radius: 8px;
  width: 100%;
  max-width: 500px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
}

h1 {
  text-align: center;
  margin-bottom: 1rem;
  color: #333;
}

.input-group {
  margin-bottom: 1rem;
}

label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: bold;
  color: #444;
}

input, select {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 1rem;
}

button {
  background-color: #4CAF50;
  color: white;
  padding: 0.75rem;
  border: none;
  border-radius: 4px;
  font-size: 1rem;
  cursor: pointer;
  transition: background-color 0.3s ease;
  width: 100%;
}

button:hover {
  background-color: #45a049;
}

.results {
  margin-top: 1.5rem;
  padding: 1rem;
  border-radius: 4px;
  background-color: #dce3ec;
}

.results h2 {
  margin-bottom: 0.5rem;
  color: #222;
}

.results p {
  font-size: 1rem;
  margin-bottom: 10px;
  color: #333;
}

@media (max-width: 600px) {
  .calculator {
    padding: 1rem;
  }

  input, button {
    font-size: 0.95rem;
    padding: 0.6rem;
  }

  h1 {
    font-size: 1.5rem;
  }
}