*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
}
 body{
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(45deg, #0a0a0a, #3a4452);
 }
 .calculator{
  border: 1px solid #717377;
  padding: 20px;
  border-radius: 15px;
  background: transparent;
  box-shadow: 0px 3px 15px rgba(113, 115, 119, 0.5);
 }
 input{
    width: 300px;
    border: none;
    padding: 25px;
    margin: 10px;
    background: transparent;
    box-shadow: 0px 3px 15px rgba(84,84,84,0.5);
    font-size: 20px;
    text-align: right;
    cursor: pointer;
    color: #ffffff;
    border-radius: 8px;
 }
 input::placeholder{
    color: #ffffff;
 }
 button{
    border: none;
    width: 50px;
    height: 50px;
    margin: 10px;
    border-radius: 50%;
    background: transparent;
    color: #ffffff;
    font-size: 16px;
    box-shadow: -8px -8px 15px rgba(255,255,255,0.1);
    cursor: pointer;
 }
 .equalBtn{
    background-color: #a84d02;
 }
 .operator{
    color: #6dee0a;
 }