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

body {
  background-color: antiquewhite;
  font-family: sans-serif;
}

h1 {
  text-align: center;
  padding: 10px;
  font-size: 2rem;
  margin: 20px 0;
}

.calculator {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 90%;
  max-width: 400px;
  margin: auto;
}

.display {
  width: 100%;
  background-color: #222;
  color: white;
  text-align: right;
  border-radius: 12px;
  padding: 15px;
  font-size: 2rem;
  word-wrap: break-word;
  margin-bottom: 20px;
}

.buttons {
  width: 100%;
}

.row {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}

.row button {
  flex: 1;
  padding: 20px;
  font-size: 1.5rem;
  background-color: orange;
  color: white;
  border-radius: 15px;
  border: none;
  box-shadow: 0 6px 10px rgba(0, 0, 0, 0.3);
  transition: all 0.1s ease-in-out;
  cursor: pointer;
}

.row button:hover {
  box-shadow: 0 12px 20px rgba(0, 0, 0, 0.4);
  transform: translateY(2px);
}

@media (max-width: 480px) {
  .display {
    font-size: 1.2rem;
    padding: 10px;
  }

  .row button {
    padding: 15px;
    font-size: 1.5rem;
  }
}