calcstyle.css

#container {
    width: 340px;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    border: 2px solid #D2691E;
    padding: 10px;
}

#table {
    font-size: 62px;
}

#keys {
    height: 80vh;
    display: flex;
    justify-content: space-evenly;
    flex-direction: column;
}

#row1,
#row2,
#row3,
#row4,
#row5,
#row6 {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    margin: 0;
}

.digit {
    height: 100px;
    width: 100px;
    background-color: #FFFFE0;
    font-size: 50pt;
    font-family: "Segoe UI";
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;

}

/* .digit:active {
		background-color: #EEE8AA;
}

.active {
	background-color: #EEE8AA;
} */

input {
    width: 100%;
    height: 10vh;
    background-color: #B0E0E6;
    margin-bottom: 10px;
    text-align: right;
    font-family: "Segoe UI";
    font-weight: 600;
    opacity: 1.0;
    color: #000;
}

@media screen and (orientation: portrait) {
    html {
        overflow-x: hidden;
    }

    body {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        align-items: center;
        width: 100vw;
        margin: 0;
        overflow-x: hidden;
    }

    #container {
        display: flex;
        width: 100vw;
        height: 100vh;
        border: none;
        transform: none;
        padding: 0;
        position: inherit;
        top: auto;
        left: auto;
        flex-direction: column;
    }

    #table {
        width: 96vw;
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 2vh 2vw;
    }

    input {
        width: 94vw;
        height: 12vh;
        border: 1px solid #cbcbcb;
        font-size: 8vh;
        padding: 0 1vw;
        margin: 0;
    }

    #keys {
        min-height: 82vh;
        height: auto;
        display: flex;
        align-items: center;
        justify-content: space-evenly;
        flex-direction: column;
    }

    #row1,
    #row2,
    #row3,
    #row4,
    #row5,
    #row6 {
        display: flex;
        flex-direction: row;
        justify-content: space-evenly;
        align-items: center;
        width: 100vw;
        margin: 0;
        padding: 0 2vw;
    }

    .digit {
        display: flex;
        justify-content: center;
        height: calc(80vh/6 - 2vw);
        line-height: calc(80vh/6 - 2vw);
        width: calc(92vw / 3);
        font-size: calc(80vh / 10);
        border: 1px solid #cbcbcb;
        margin: 0;
        align-self: center;
        vertical-align: middle;
        color: #000;
    }
}