body {
  font-family: Arial, sans-serif;
  background: linear-gradient(135deg, #a18cd1, #fbc2eb);
  display: flex;
  flex-direction: column;
  height: 100vh;
  justify-content: center;
  align-items: center;
  margin: 0;
}
h1{
    color: #180127;
    margin-bottom: 0;
}
p{
    color: #2c2c2c;
    margin-top: 0;
    margin-bottom: 25px;
    font-size: 18px;
}

.calculator {
  background: #fff;
  margin-top: 10px;
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 4px 8px 4px #4b007d;
}

#display {
  width: 250px;       
  max-width: 100%;
  font-size: 24px;
  padding: 10px;
  margin-bottom: 10px;
  text-align: right;
  border: 1px solid  #2c2c2c;
  border-radius: 6px;
}

.buttons {
  display: grid;
  grid-template-columns: repeat(4, 60px);
  gap: 10px;
  justify-content: center;
}
button.zero {
  grid-column: span 2;
}

button {
  padding: 15px;
  font-size: 25px;
  border: none;
  border-radius: 8px;
  background-color: #e0e0e0;
  cursor: pointer;
  transition: background-color 0.3s;
}

button:hover {
  background-color: #ccc;
}