*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}
body{
    height: 100vh;
}

.center{
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
}
.container{
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(5, 1fr);
    gap: 8px;
    scale: 1.2;
    max-width: 100%;
}

.screen{
    grid-column: span 4 / span 4;
    background-color: rgba(0, 255, 255, 0.2);
    height: 4rem;
    border: 1px solid rgb(0, 0, 0);
    border-radius: 5px;
    display: flex;
    align-items: center;
    justify-content: end;
    padding: 5px;
    padding-right: 8px;
    overflow: hidden;
    white-space: nowrap;
    width: 300px;
}
.screen #result{
    font-size: 2rem;
    display: inline-block;
    max-width: 100%;
}

.buttons{
    grid-column: span 4 / span 4;
    grid-row: span 4 / span 4;
    grid-row-start: 2;
}
.grid{
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(4, 1fr);
    gap: 8px;
}
#b4 {
    grid-column-start: 1;
    grid-row-start: 2;
}

#b5 {
    grid-column-start: 2;
    grid-row-start: 2;
}

#b6 {
    grid-column-start: 3;
    grid-row-start: 2;
}

#b7 {
    grid-column-start: 1;
    grid-row-start: 3;
}

#b8 {
    grid-column-start: 2;
    grid-row-start: 3;
}

#b9 {
    grid-column-start: 3;
    grid-row-start: 3;
}

#b0 {
    grid-column-start: 2;
    grid-row-start: 4;
}

#plus {
    grid-column-start: 4;
    grid-row-start: 1;
}

#minus {
    grid-column-start: 4;
    grid-row-start: 2;
}

#multiply {
    grid-column-start: 4;
    grid-row-start: 3;
}

#devide {
    grid-column-start: 4;
    grid-row-start: 4;
}

#equals {
    grid-column-start: 3;
    grid-row-start: 4;
}

#clear {
    grid-column-start: 1;
    grid-row-start: 4;
}

.button{
    cursor: pointer;
    padding: 1rem;
    background-color: yellow;
    border-radius: 5px;
}
.button:hover{
    background: orange;
}
.button:active{
    scale: 0.9;
}

@media(max-width: 500px){
    .container{
        scale: 1;
    }
}