*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}
i{
    padding: 30%;
}
body{
    background-color: antiquewhite;

}
h1{
    text-align: center;
    font-family: Georgia, 'Times New Roman', Times, serif;
    font-size: 3rem;
    font-weight: bold;
    text-shadow: 3px 5px 3px rgba(207, 188, 94, 0.74);
}
#container{
    width: 420px;
    color: white;
    margin: 20px auto;
    padding: 10px;
    display: grid;
    grid-template-columns: repeat(4, 100px);
    grid-template-rows: 20px 50px repeat(6, 100px);
    background-color: black;
    border-radius: 50px;
    box-shadow: 3px 5px 3px rgba(207, 188, 94, 0.74);
}
.header{
    grid-column: 1/5;
    width: 90%;
    margin-left: 20px;
    color: white;
}
.buttons{
    border-radius: 50%;
    border: none;
    background-color: #333333;
    text-align: center;
    margin: 5px;
    line-height: 90px;
    font-size: 2rem;
    cursor: pointer;
    color: white;
}
.buttons:hover{
    background-color: #181818;
    color: #b4b4b4;
}
.grey{
    background-color: gray;
    color: black;
}
.grey:hover{
    background-color: rgb(71, 71, 71);
}
.orange{
    background-color: rgb(235, 178, 72);
}
.orange:hover{
    background-color: rgb(184, 120, 3);
}
#operate{
    grid-column: 1/5;
}

#result{
    grid-column: 1/5;
}
#n0{
    grid-column: 1/3;
    border-radius: 50px;
}
#result,#operate{
    border-radius: 0;
    text-align: right;
    background-color: black;
    font-size: 3rem;
    padding-right: 1rem;
    cursor: auto;
}
#operate{
    line-height: 3rem;
    font-size: 1.5rem;
}
.footer{
    width: 30%;
    border: 2px solid white;
    margin: auto;
    grid-column: 1/5;
    margin-top: 5px;
}