body{
    background-color:darkslategrey;
}
* {
  box-sizing: border-box;  
}
#calculator{
    border: 2px solid black;
    width: 28%;
    height: 80%;
    min-width: 300px;
    min-height: 400px;
    margin: auto;
    margin-top: 30px;
    background-color: lightcyan;
    border-radius: 5px;
    padding: 10px;
    box-shadow: 0px 0px 3px 3px 
    lightblue;
    
}
#calculator h1{
    text-align: center;
    margin-top: 8px;
    margin-bottom: 10px;
    text-transform: uppercase;
    
}
#display-container{
    width: auto;
    height: 10%;
    border: 2px solid black;
    min-height: 100px;
    background-color:linen;
    display: flex;
    align-items: flex-end;
    justify-content: flex-end;
    margin-bottom: 10px;
    border-radius: 5px;
    box-shadow: 0px 0px 2px 2px white;
    
}
#display-container p {
    font-size: 2rem;
    margin: 0.5rem;
    vertical-align: text-bottom;
}
.di{
    margin: 0.5rem;
    vertical-align: text-top;
}
#buttons-container{
    border: 1px solid black;
    background-color: lightgray;
    width: auto;
    height: 60%;
    min-height: 300px;
    display: flex;
    flex-flow: row wrap;
    justify-content: space-around;
    
    

}
.button{
    border: 1px solid black;
    height: 20%;
    width: 25%;
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    cursor: pointer;
    box-shadow: 0px 0px 4px 4px white;
    transition-duration: 0.5s;
}
#button-equals{
    width: 50%;
}
.button:hover{
    background-color: lightgreen;
    
}