body {
    font-family: Arial, sans-serif;
 background-image: url("reloj2.png");
    
 color:#0F27F0;
}

.calculadora {
    background-color: #F90D0D;
    margin: 100px;
   
    padding: 70px;
    width:400px;
   border-radius:20px;
}

form {
    display: flex;
    flex-direction: column;
    
    
    
}

button {
    background-color: #007BFF;
    color: #fff;
    padding: 7px;
    border-width:6px;
    border-color:yellow;
    
   
}