body {
    background: #D9D9D9;
    width: 100%;
    height: 100%;
    color: #ffffff;
    font-size: 150px;
  }
  
a {
    text-align: center;
    line-height: 25px;
    font-weight: 300;
    padding: .5rem 1rem;
    line-height: 1.5em;
    border-radius: 6px;
}

  .calculadora {
    margin-top: 150px;
    border: solid 1px #000;
    padding: 20px;
    background-color: #2E2E2E;
    border-radius: 10px;
    box-shadow: 1px 1px 5px #000;
  
  }
  
.btn {
    width: 60px;
    height: 50px;
    margin: 6px;
    box-shadow: 1px 1px 1px #000;
}
  
.clear {
    width: 130px;
    background-color: #e34a4a;
    border-color: #f04242;
}
.clear:hover {
    background-color: #fd2a2a;
    border-color: #f12727;
}

.enter {
    height: 110px;
    line-height: 85px;
    background-color: #00a4fe;
    border-color: #0694e0;
}
.enter:hover {
    background:#008cfe;
    border-color:#047fe4;
}
  
  .zero {
    width: 130px;
  }
  
  input {
    text-align: right;
    font-size: 24px;
    margin-top: 10px;
    margin-bottom: 20px;
    border: solid 1px #000;
    box-shadow: 1px 1px 1px rgb(7, 3, 3);
    letter-spacing: 0.3px;
}