body {
  font-family: Arial, sans-serif;
  background: linear-gradient(to bottom right, #74b9ff, #81ecec);
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.calculator {
  background: #ffffff;
  border-radius: 12px;
  padding: 20px 30px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  text-align: center;
  width: 100%;
  max-width: 400px;
  box-sizing: border-box;
}

.calculator h2 {
  color: #0078d7;
  margin-bottom: 15px;
  font-size: 22px;
}

.calculator label {
  display: block;
  font-size: 14px;
  color: #4a4a4a;
  margin-bottom: 10px;
}

.calculator input {
  width: 100%;
  padding: 10px;
  font-size: 16px;
  border: 1px solid #ccc;
  border-radius: 8px;
  margin-bottom: 20px;
  box-sizing: border-box;
}

.calculator button {
  background: #12c5c3;
  color: white;
  border: none;
  padding: 10px 20px;
  font-size: 16px;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.3s;
}

.calculator button:hover {
  background: #0ea8a7;
}

#result {
  margin-top: 20px;
  background: #f9f9f9;
  border: 1px solid #ccc;
  padding: 10px;
  border-radius: 8px;
  font-size: 14px;
  color: #333;
  text-align: left;
}