h1 {
    margin: auto;
    text-align: center;
    text-shadow: -2px -2px 0px black, 1px 1px 0px black;
    color: #333;
    opacity: 0.5;
    font: 700 48px 'Bitter';
}
h2 {
    margin: auto;
    margin-bottom: 16px;
    text-align: center;
    text-shadow: -1px -1px 0px black, 1px 1px 0px black;
    color: #333;
    opacity: 0.5;
    font: 400 36px 'Bitter';
}
div#logo-alstom img {
    max-width: 60%;
}
div#menu button {
    min-width: 50%;
    display: block;
}
ul#playground {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
}
li.tile {
    float: left;
    padding: 10px;
    width: 100%;
    height: 48px;
    text-align: center;
    cursor: move;
}
li.tile-group-title {
    font-weight: bold;
}
li.tile:not(:last-child):after {
    content: '';
    height: 0;
    position: absolute;
    width: 0;
    left: calc(50% - 8px);
    top: 47px;
    border: 8px solid transparent;
    border-top-color: #bee5eb;
}
.highlight {
    float: left;
    border: 1px solid #0c5460;
    width: 100%;
    height: 48px;
    background-color: #bee5eb;
    border-radius: 6px;
}
div#credits {
    text-align: center;
}