teacherGames/mj/main.css

body {
    margin: 0;
    font-family: sans-serif;
}

* {
    box-sizing: border-box;
}

.fs,
body,
html {
    width: 100%;
    height: 100%;
    overflow: hidden;
}
.card,
.cp {
    display: flex;
    align-items: center;
    justify-content: center;
}

.button {
    background-color: rgba(0, 0, 0, 0);
    transition: background-color 200ms ease-in-out;
}

.button:hover {
    background-color: rgba(0, 0, 0, 0.2);
}

.cp {
    color: white;
    font-family: monospace;
    font-size: 48px;
}

.card {
    width: 150px;
    height: 220px;
    background-color: #d8ecbe;
    margin: 5px;
    float: left;
    box-shadow: #000000 1px 1px 5px -1px;
    font-size: 17pt;
    color: #4c4c4c;
    opacity: 1;
    user-select: none;

    transition: background-color 200ms ease-in-out,
                opacity 200ms ease-in-out,
                top 200ms ease-in-out,
                left 200ms ease-in-out,
                transform 100ms ease-in-out;
}

.selected {
    background-color: #8bc9ee;
    z-index: 5;
}

.card.selected:hover {
    background-color: #8bc9ee;
}

.card:hover {
    background-color: #e3cfbb;
}

.panel {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    background-color: #198cfc;
    box-shadow: #000000 0px 1px 4px 0px;
}