* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}

body {
  background: #eaeaea;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.calculator {
  background: #222;
  padding: 20px;
  width: 320px;
  border-radius: 15px;
}

input {
  width: 100%;
  border: none;
  border-radius: 8px;
  padding: 10px;
  margin-bottom: 8px;
  text-align: right;
    background-color: #444;

}

#expression {
  height: 40px;
  font-size: 20px;
  color:white;
}

#result {
  height: 55px;
  font-size: 26px;
  font-weight: bold;
  color:wheat;
}

.buttons {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

button {
  padding: 15px;
  font-size: 18px;
  background:#444;
  color: white;
  border: none;
  border-radius: 10px;
  cursor: pointer;
}

button:hover {
  background: #c0ae75;
}
.DEL{
  background-color: red;
}
.clear{
  background-color: cadetblue;
}
.DEL:hover{
  background-color: crimson;
}
.clear:hover{
  background-color: darkgrey;
}
.equal {
  grid-row: span 1;
  background: #ff9800;
}

.zero {
  grid-column: span 1;
}