*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    font-family: sans-serif;
}

html,body{
    width: 100%;
    height: 100%;
}

.container{
    width: 100%;
    max-width: 25rem;
    background-color: #141414f1;
    margin: 50px auto;
    border-radius: 10px;
    padding: 1.5rem;
}

.container .screen{
    height: 4rem;
    background-color: black;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    font-size: 30px;
    color: rgb(4, 147, 4);
    padding: 10px;
}

.container .btnContainer{
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(5, 1fr);
    gap: 10px;
    margin: 20px 0;
    user-select: none;
}

.container .btnContainer button{
    padding: 20px 0;
    border-radius: 5px;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    font-size: 20px;
    color: white;
    border: none;
    outline: none;
    transition: 1s;
}

.container .btnContainer button:active{
    transform: scale(1.05);
}

.container .clearBtn{
    grid-column: 1/4;
    background-color: #DD3545;
}

.container .num{
    background-color: #333333;
}

.container .equalTo{
    grid-column: 3/5;
    grid-row: 5/6;
    background-color: #1772C7;
}

.container .operator{
    background-color: #FF9701;
}