html {
    height: 100%;
}

body {
    /* Disable double-tap zoom on mobile devices */
    touch-action: manipulation;
    margin: 0;
    padding: 10px;
    box-sizing: border-box;
    font-family: monospace !important;
}

.content {
    background-color: rgba(255, 255, 255, .8);
    border-radius: .25em;
    box-shadow: 0 0 .25em rgba(0, 0, 0, .25);
    box-sizing: border-box;
    text-align: center;
    margin-left: auto;
    margin-right: auto;
    max-width: 1024px;
}

h1, h2, h3, h4, h4 {
    font-family: monospace !important;
}

h1 {
    font-size: 38px !important;
}
h2 {
    font-size: 28px !important;
}

.how-to-dialog {
    width: 80% !important;
    max-width: 600px;
}
.how-to-dialog .mdl-dialog__content {
    text-align: left;
    font-size: 17px;
}

#keyboard {
    width: 100%;
    height: 40%;
    padding: 10px;
    box-sizing: border-box;
}

#keyboard td {
    vertical-align: middle;
    text-align: center;
    cursor: pointer;
}

#keyboard td:hover {
    vertical-align: middle;
    text-align: center;
    cursor: pointer;
    opacity: 0.8;
}