body{
    margin: 0;
    padding: 0;
    background: #7AA5D2;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: 'poppins','arial';
    font-weight: 600;
    background-color: black;
}
.container{
    margin: 2rem 0;
    width: 22rem;
    height: 33rem;
    background: #e8e8e8;
    border-radius: 1rem;
    box-shadow: 0 0 20px rgba(0,0,0.25);
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}
.screen_wrap{
    margin: 2rem 0 1rem 0;
    width: 18rem;
    height: 5rem;
    border-radius: 0.5rem;
    background: #e8e8e8;
    box-shadow: 6px 6px 12px #cfcfce,
    -6px -6px 12px #ffffff;
    display: flex;
    justify-content: center;
    align-items: center;
}
.screen_container{
    width: 17rem;
    height: 4rem;
    border-radius: 0.25rem;
    background: #BBBFCA;
    box-shadow: inset 7px 7px 15px #9fa2ac,
    inset -7px -7px 15px #d7dce8;
}
.screen{
    padding-right: 7px;
    width: 100%;
    height: 70%;
    color: #303841;
    font-size: 2rem;
    box-sizing: border-box;
    text-align: right;
}
.history{
    padding: 4px 7px 0 0;
    width: 100%;
    height: 30%;
    font-size: 1rem;
    color: #303841;
    box-sizing: border-box;
    text-align: right;
    opacity: 0.5;
}
.btn_wrap{
    width: 20rem;
    height: 22rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 1rem;
}
.btn{
    all:unset;
    width: 3.5rem;
    height: 3.5rem;
    font-size: 1.3rem;
    color: #303841;
    border-radius: 50%;
    background: #e8e8e8;
    display: grid;
    cursor: pointer;
    place-content: center;
    box-shadow: 5px 5px 10px #cfcfce,
    -5px -5px 10px #ffffff;
}
.btn:nth-child(19){
    width: 8rem;
    border-radius: 4rem;
}
.btn:nth-child(3),
.btn:nth-child(4),
.btn:nth-child(8),
.btn:nth-child(12),
.btn:nth-child(16){
    background: #9fa2ac;
}
.btn:nth-child(1),
.btn:nth-child(2),
.btn:nth-child(19){
    background: #FECDA6;;
}