body{
    padding:0;
    margin: 0;
}

.wrapper{
    width: 400px;
    background-color: black;
    color: white;
}

.screen{
    background-color: black;
    color: white;
    font-size: 40px;
    font-family: 'Courier New', Courier, monospace;
    text-align: right;
    padding:0px 5px;

}

.calc-button-row{
    display: flex;
    flex-flow: row nowrap;
    justify-content: space-between;
    padding-bottom: 0.5%;
}
.calc-button{
    font-family: 'Courier New', Courier, monospace;
    font-size: 40px;
    border: none;
    flex-basis: 24.5%;
    background-color: #d8d9db;
    color:black;

}
.calc-button:hover{
    background-color: #ebebeb;
}
.calc-button:active{
    background-color: #bbbcbe;
}
.double{
    flex-basis: 49.7%;
}
.triple{
    flex-basis: 74.8%;
}

.calc-button:last-child{
    background-color: #df974c;
}
.calc-button:last-child:hover{
    background-color: #dfb07e;
}
.calc-button:last-child:active{
    background-color: #dd8d37;
}