Index.css

*
{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins';
}
body
{
    height: 100vh;
    width: 100vw !important;
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(to left , #f85032 , #e73827);
    overflow: hidden;
}
.Buttons
{
    display: grid;
    grid-template-columns: repeat(4, 50px);
    grid-template-rows: repeat(5, 50px);
    grid-gap: 10px;
    text-align: center;
    justify-content: center;
}
.B
{
    color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    font-size:larger;
    cursor: pointer;
}
.Main
{
    border-radius: 16px;
    width: auto;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    margin: auto;

    background: rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);

    padding: 20px;
    border-radius: 10px;
}
.Inp
{
    text-align: right;
    padding: 20px 0px;
    border: none;
    background-color: transparent;
    color: white;
}
.Inp:focus
{
    outline: none;
}
#B19 , #B4 , #B8 , #B12 , #B16 , #B20
{
    background-color: #e73827;
    color: white;
}
.Body-Dark
{
    background: linear-gradient(to right , #16222A , #3A6073);
}