styles.css

@import url('https://fonts.googleapis.com/css2?family=Baloo+Bhai+2:wght@400;500;600;700;800&display=swap');

*,*::after,*::before{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Baloo Bhai 2', cursive;
    user-select: none;
}
body{
    width: 100%;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: lightgrey;
}

.container{
    border: 2px solid black;
    width: 400px;
    padding: 1.5em 1.2em;
    display: flex;
    flex-direction: column;
    gap: 1em;
    background-color: rgb(22, 22, 22);
    border-radius: 1.5rem;
}
.screen{
    border: 2px solid black;
    width: 100%;
    min-height: 8rem;
    border-radius: 1.5rem;
    padding: 1rem;
    background-color: rgb(43,41,42);
    color: white;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-direction: column;
}
.screen > *{
    width: 100%;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    word-wrap: break-word;
    word-break: break-all;
}
.prev-screen{
    color: rgb(184, 173, 173);
    font-size: 1.4rem;
    min-height: 2.5rem;
}
.curr-screen{
    font-size: 2.2rem;
    min-height: 3.9rem;
}
.row{
    display: flex;
    justify-content: space-around;
    gap: 0.7em;
    height: 5em;
}
.btn{
    border: 2px solid black;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.8em;
    font-size: 1.8rem;
    font-weight: 300;
    background-color: rgb(52,52,52);
    color: white;
    cursor: pointer;
}

.row-4-and-5{
    display: flex;
    height: 11em;
    gap: 0.7em;
}
.rows{
    flex: 3.45;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 1em;
}
.sub,
.pi,
.mod,
.divide,
.mul,
.add{
    background-color: rgb(26,67,78);
}
.equals{
    background-color: rgb(3,202,200);
    font-size: 2rem;
}
.del{
    background-color: rgb(252, 85, 85);
}

@media (max-height: 674px){
    .container{
        transform: scale(0.8);
    }
}