calc-style.css

body {
    width: 100%;
    height: 100vh;
    background-color: #603311;
    background-image: url("https://www.transparenttextures.com/patterns/dark-wood.png");
    color: black;
    font-size: 1.5em;
    overflow: hidden;
}

.header {
    width: 100%;
    max-height: 70%;
}

a {
    color: inherit;
}

a:hover {
    color: white;
    text-decoration: none;
}

#home {
    width: 100px;
    margin: 1em;
    text-align: center;
    background-color: black;
    color: white;
}

.workspace {
    width: 30vw;
    margin-top: 3%;
    margin-bottom: 1%;
    padding: 1%;
    background-color: #5c5c5c;
    background-image: url("https://www.transparenttextures.com/patterns/light-aluminum.png");
    border-top: 0 solid #363636;
    border-bottom: 8px solid #363636;
    border-left: 5px solid #363636;
    border-right: 0 solid #363636;
}

@media only screen and (max-width: 600px) {
    .workspace {
        width: 100vw;
    }

    #home-button {
        display: flex;
        justify-content: center;
    }
}

.title {
    text-shadow: 0 0 0 #000, 0 0 0 #000, -2px 2px 0 #000, 0 0 0 #000;
    font-family: "Bowlby One SC", "sans-serif";
    text-align: center;
    font-size: 170%;
    color: #999999;
    width: 100%;
}

.screenHold {
    width: 80%;
    height: 5.5em;
    margin: 15% 5% 5% 10%;
    padding-top: 1.5em;
    background-color: #000011;
    border-top: 4px solid #171717;
    border-bottom: 3px solid #171717;
    border-left: 3px solid #171717;
    border-right: 4px solid #171717;
}

#screen {
    height: auto;
    width: 100%;
    padding-right: 3px;
    color: red;
    font-family: "Orbitron", "sans-serif";
    font-size: 2em;
    text-align: right;
    line-height: 1em;
    overflow-wrap: break-word;
    white-space: nowrap;
    overflow: hidden;
    display: inline-block;
}

/*BUTTONS*/
.buts {
    width: 21%;
    margin: 0.75%;
    padding-top: 4%;
    background-color: #FF00AA;
    background-image: url("https://www.transparenttextures.com/patterns/rough-cloth-light.png");
    font-family: "Black Ops One", "sans-serif";
    font-weight: bold;
    border-top: 0 solid #8B2252;
    border-bottom: 4px solid #8B2252;
    border-left: 3px solid #8B2252;
    border-right: 0 solid #8B2252;
}

.buts:focus {
    outline: 0;
}

.buts:hover {
    filter: brightness(75%);
}

.buts:active {
    filter: brightness(150%);
    border-top: 0 solid #8B2252;
    border-bottom: 0 solid #8B2252;
    border-left: 0 solid #8B2252;
    border-right: 0 solid #8B2252;
}

.ops {
    background-color: #099FFF;
    border-top: 0 solid #2F4F4F;
    border-bottom: 4px solid #2F4F4F;
    border-left: 3px solid #2F4F4F;
    border-right: 0 solid #2F4F4F;
}

.power {
    background-color: #FF0000;
    border-top: 0 solid #660000;
    border-bottom: 4px solid #660000;
    border-left: 3px solid #660000;
    border-right: 0 solid #660000;
}

#ac, #ce {
    width: 45%;
}

.foot {
    padding-top: 1%;
    font-family: "Orbitron";
}