style.css

.container{
    width: 540px;
    margin: 0 auto;
}
.container h2{
    text-align: center
}
.grade-point-body{
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: space-around;
    align-items: center;
    align-content: center;
    border: 1px solid;
    height: 500px;
}
.input fieldset{
    display: flex;
    flex-direction: column;
    background-color: aliceblue;

}
.input fieldset input, label, button{
    display: block;
    line-height: 30px;
    margin: 2px 5px;
    font-weight: 700;
    text-transform: uppercase;
    text-align: center;
}
.input button{
    background-color: rgb(107, 197, 107);
    color: white;
    border: none;
}
.output{
    background-color: aliceblue;
    height: 450px;
    width: 250px;
    padding: 10px;
    text-align: center;
    display:flex;
    flex-direction: column;
    justify-content: flex-start;
}
.output .total , .avg {
    height: 70px;
   
}
.output .grade{
    height: 220px;
}
.output h2{
    border: 1px solid;
    font-size: 20px;
    background-color: rgb(184, 216, 176);
}
.output div{
    background-color:white;
}