*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: sans-serif;
    font-weight: bold;
}
body{
    width: 100%;
    height: 100vh;
    background-color:dimgrey;
    display: flex;
    justify-content: center;
    align-items: center;
}
.calculator{
    padding:20px;
    border: 2px solid black;
    border-radius: 16px;
    box-shadow: 0px 3px 15px rgba(0, 0, 0, 0.8);
    background-color: rgba(48, 20, 20, 0.603);
}
input{
    width: 320px;
    padding: 24px;
    margin: 10px;
    background-color: gainsboro;
    box-shadow: inset 0px 0px 8px rgba(0, 0, 0, 0.4);
    text-align: right;
    font-size: 65px;
    border: solid 2px lemonchiffon;
    color: black;
    border-radius: 16px;
}
#preview{
  width:320px; 
  margin:0 10px 10px; 
  text-align:right; 
  min-height:20px;
  font-size:14px; 
  color:#eee; 
  opacity:.9;
}
button{
    width: 60px;
    height: 60px;
    margin: 10px;
    color: aliceblue;
    background-color: black;
    font-size: 24px;
    cursor: pointer;
    border: solid 2px rgba(128, 128, 128, 0.66);
    border-radius: 25px;
    box-shadow: -1px 2px 10px rgba(0, 0, 0, 0.5);
}
button:hover{
    background-color:#f67d14;
    color: white;
}
.AC, .DEL{
    font-size: 20px;
}
.equalBtn{
    background-color:#f67c14;
}
.operator{
    color:#f67c14;
}