* {
    margin: 0;
    padding: 0;
    box-sizing: box;
}

body {
    min-height: 100vh;
    background: lightblue;
    display: flex;
    justify-content: center;
    align-items: center;
}

.calculator {
    width: 350px;
    height: 524px;
    box-shadow: 4px 4px 30px rgba(0, 0, 0, 0.3);
    border-radius: 12px;
    background: #22252D;
    /* overflow : hidden; */
}


form input{ 
    text-align: right;
    cursor: text;
    width: 100%;
    height: 40px;
    background: none;
    border: none;
    font-size: 2rem;
    color: #fff;
    outline: none;
    caret-color: transparent;
}

.screenDiv1{
    width: 318px;
    height: 150px;
    border: none;
    border-radius: 12px;
    font-size: 2rem;
    padding: 1rem;
    color: #fff;
    background: #000;
    text-align: right;
    display: flex;
    flex-direction: column;
    justify-content: center;
    justify-items: center;
    align-items: center;
}

.btns {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    padding: 20px;
}

button {
    flex: 0 0 22%;
    margin: 5px 0;
    border: 1px solid #000;
    width: 60px;
    height: 52px;
    font-size: 22px;
    font-weight: 600;
    border-radius: 5px;
    cursor: pointer;
}

.btn-yellow {
    background-color: rgb(240, 169, 17);
    color: #fff;
}

.btn-blue {
    background-color: rgb(10, 177, 168);
    color: #fff;

}

.btn-clear {
    background-color: rgb(241, 71, 71);
}

.btn-equal {
    background-color: rgb(188, 216, 30);
}