html, body {
    display: table;
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    overflow-x: hidden;
    overflow-y: hidden;
    margin: 0;
    padding: 0;
    font-family: "Fontin Sans CR", "Gill Sans", "DejaVu Sans", sans-serif ;
}

#content {
    margin-left: auto;
    margin-right: auto;
    padding: 8px;
    width: 300px;
    background-color: rgba(145,217,255,0.29);
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

h1{
    padding: 1ex 0px 1ex 0px;
    width: 100%;
    margin: 0px;
    text-align: center;
    font-family: "Lobster", serif;
    font-size: 30pt;
    letter-spacing: 0.2ex;
    color: #d8773aff;
    -webkit-text-stroke: 1px black;
    -moz-text-stroke: 1px black;
}

form {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.input-field {
    text-align: center;
    padding: 0.5ex;
}

.operator {
    width: 3em;
}

#calendar {
    height: 17em;
    width: 100%;
    display: table;
}

#calendar pre {
    margin-left: auto;
    margin-right: auto;
    width: 22ex;
    font-size: large;
    font-family: monospace, Monospaced;
}


button {
    font-family: "Fontin Sans CR", "Gill Sans", "DejaVu Sans", sans-serif ;
    min-width: 35px;
    min-height: 25px;
}