body {
    background-image: url("masahiro-miyagi-LYad5mkf6A4-unsplash.jpg");
}
* {
    margin: 0;
    padding: 0;
    font-family: 'Poppins', sans-serif; 
    box-sizing: border-box;
}
.container {
    width: 100%;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}
.calculator {
    padding: 20px;
    border-radius: 10px;
    background-color: skyblue;
}
.bigB {
    font-size: 40px; 
    width: 85px; 
}

.litB {
    font-size: 40px; 
    width: 40px; 
} 

#result {
    font-size: 48px;
    height: 58px;
    width: 184px;
    margin-left: auto;
    margin-right: auto;
}

.buttons {
    padding: 4px;
    font-size: 20px;
}