body{
    margin: 0;
    display: flex;
    color: #fff;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: rgb(2, 2, 61);
}

button{
    width: 100px;
    height: 100px;
    border: none;
    border-radius: 50px;
    background-color: rgb(28, 26, 26);
    color: #fff;
    font-size: 3em;
    cursor: pointer;
}

#cal{
    border-radius: 20px;
    width: 450px;
    height: auto;
    background-color: black;
    padding: 40px;
}
#display{
    background-color: rgb(26, 26, 26);
    color: #00ffae;
    width: 100%;
    font-size: 4em;
    text-align: right;
    margin: 10px;
    border: none;
    border-radius: 10px;
}
#keys{
    display: grid;
    grid-template-columns: repeat(4,1fr);
    row-gap: 10px;
    column-gap: 10px;
    padding: 5px;
}
#c{
    color: #00ffae;
}

button:hover{
    background-color: #016948;
}