@font-face {
    font-family: 'VT323';
    src: url('./font/VT323-Regular.eot');
    src: url('./font/VT323-Regular.eot?#iefix') format('embedded-opentype'),
        url('./font/VT323-Regular.woff2') format('woff2'),
        url('./font/VT323-Regular.woff') format('woff'),
        url('./font/VT323-Regular.ttf') format('truetype'),
        url('./font/VT323-Regular.svg#VT323-Regular') format('svg');
    font-weight: normal;
    font-style: normal;
    font-display: swap;
}

body {
    background: grey;
}

.shell {
    position: absolute;
    top: 50%;
    left: 50%;
    -webkit-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
    border-radius: 7% / 5%;
    background: darkslategrey;
    padding: 12px;
    width: 360px;
}

.display {
    position: relative;
    margin: 5px;
    margin-bottom: 12px;
    border-radius: 4% / 12%;
    background: pink;
    height: 98px;
    color: #590730;
    padding: 30px;
}

#displayText {
    position: absolute;
    bottom: 0;
    right: 30px;
    left:30px;
    text-align: right;
    font-family: 'VT323', monospace;
    font-size: 40px;
    font-style: bolder;
    overflow-wrap: anywhere;
    user-select: none;
    -moz-user-select: -moz-none;
    -khtml-user-select: none;
    -webkit-user-select: none;
}

.operator, .allClear, .number, .equals {
    margin: 5px;
    border: 2px solid transparent;
    border-radius: 18% / 20%;
    height: 71px;
    width: 76px;
    float: left;
    text-align: center;
    vertical-align: middle;
    line-height: 71px;
    font-family: Arial;
    font-size: 32px;
    font-weight: bolder;
    color: darkslategrey;
    user-select: none;
    -moz-user-select: -moz-none;
    -khtml-user-select: none;
    -webkit-user-select: none;
}

.operator:hover, .allClear:hover, .number:hover, .equals:hover {
    filter: brightness(85%);
}

.operator {
    background: lightblue;
}

.allClear {
    background: orange;
}

.number {
    background: lightgreen;
}

.equals {
    background: #ffffa0;
}

#openParenthesis, #closeParenthesis {
    line-height: 65px;   
}