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

body{
    display: flex;
    justify-content: center;
    align-items: center;

    height: 100vh;

    background: linear-gradient(grey, teal);
}

.calc{

    display: flex;
    flex-direction: column;

    border-radius: 1rem;
    width: 20rem;
    gap:1rem;
    padding: 1rem;
    background-color: black;
}

.btnContainer{
   
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap:0.5rem;
}


input[value='0']{
    grid-column-start: 1;
    grid-column-end: 3;
    width: auto !important;
    border-radius: 2rem !important;
}
input[type='button']{
    width: 4rem;
    height: 4rem;
    border-radius: 50%;
    border: none;
    font-size: 1.5rem;
}

.op{
    background-color: rgb(255, 166, 0);
    color: white;
    
}

.function{
    background-color:cadetblue;
    color: white;
}

.num{
    background-color: rgb(50, 48, 48);
    color: white;
}

#display{
    background-color: transparent;
    border: none;
    outline: none;
    font-size: 3rem;
    color: white;
    text-align: right;
    padding: 1rem;
}