.outer
{
    width: 400px;
    background-color: rgb(80, 79, 79);
	border: 1px solid black;
	margin: auto;
    margin-top: 100px;
    border-radius: 50px 50px 50px 50px;
}

#inner
{
    height: 120px;
    background-color: grey;
    color: white;
    font-size: 2em;
    text-align: right;
    line-height: 5.3em;
    border-radius:  50px 50px 0 0;
    font-family: system-ui;
    margin-bottom: 20px;
    background-color: rgb(185, 182, 182);
    color:rgb(80, 79, 79);
}

#result
{
    height: 100px;
    padding: 0 10px;
    overflow: hidden;
}

/* input
{
    width: 94.5%;
    height: 100px;
    padding: 0 10px;
    overflow: hidden;
    border-radius:  50px 50px 0 0;
    background-color: grey;
    color: white;
    outline: none;
    border: 1px solid grey;

} */

.row 
{
    margin: 1px auto;
    text-align: center
}
td
{
    padding: 5px;
}
button
{
    background-color: rgb(104, 102, 102);
    height: 80px;
    width: 80px;
    margin: 4px 1px; 
    cursor: pointer;
    border: none;
    color: white;
    padding: 20px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    margin: 4px 2px;
    border-radius: 50%; 
    outline: none;
    font-size: 1.5em;
}

button:focus
{
    background-color:grey;
}

#zero
{
    height: 70px;
    width: 168px;
    border-radius:  50px 50px 50px 50px;
}

.row button:last-child
{
    background-color: orange;
    font-size: 1.8em;
}

.row button:last-child:focus
{
 background-color: white;
 color: orange;
}


.row:nth-child(2) button:not(:last-child)
{
    background-color: rgb(185, 182, 182);
    color:rgb(80, 79, 79);
}

.row:nth-child(2) button:not(:last-child):focus
{
    background-color: rgb(218, 216, 216);
}