.keyboard {
    display: grid;
    grid-template-columns: 60px 60px 60px 60px 60px;
    gap: 10px;
    margin-top: 20px;
}

.keyboard button{
    background-color: #F5F5F5;
}

.circle-button{
    width: 60px;
    height: 60px;
    border-radius: 100%;    
}

.fs-16{
    font-size: 18px !important;
}

.btn{
    cursor: pointer;
    border: none;
    font-size: 14px;
    box-shadow: 0px 0px 2px #3d3d3d;
}

.btn:hover{
    background-color: #BBDAF6;
}

.top-key{
    width: 60px;
    border-radius: 20px;
    padding: 10px 0px;
}

.zero-btn{
    grid-column: 1 / 3;
    border-radius: 40px;
    font-size: 18px;
}

.plus-btn{
    grid-column: 4;
    grid-row: 5 / 7;
    border-radius: 20px;
    padding: 0px 0px;
    font-size: 18px;
}