*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}
body{
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}
input{
    padding: 1rem 0.5rem;
    font-size: 1rem;
    width: 100%;
}
button{
    padding: 1rem 1.5rem;
    font-size: 1rem;
}
.buttons{
    display: grid;
    grid-template-columns: repeat(4, 1fr);
}
.equal{
    grid-row: 4/6;
    grid-column: 4/5;
}
.zero{
    grid-column: 2/4;
    grid-row: 5/6;
}
.dot{
    font-weight: 900;
}
.plus{
    grid-row: 2/3;
    grid-column: 4/5;
}
.erase{
    grid-column: 1/2;
    grid-row: 1/2;
}