body {
    background-color:lightgray;
    font-size: 24px;
}

button {
    font-size: 24px;
}

p {
    display: inline-block;
    margin-top: 0.75em;
    margin-bottom: 0.75em;
}

div {
    margin: auto;
    width: fit-content;
}

#flexcontainercontainer {
    font-size: 36px;
    margin: auto;
    margin-top: 5px;
    padding: 0;
    width: 18.9em;
    border: 5px outset;
}

.flexcontainer {
    display: flex;
    justify-content: flex-start;
    margin: 0;
    flex-flow: row wrap;
    overflow: hidden;
}

.flexitem {
    user-select: none;
    cursor: pointer;
    width: 2.5em;    
    margin: 0.1em;
    text-align: center;
    box-shadow: 0 0 0 2px black;
    background-color: white;
    transition-property: all;
    transition-duration: 0.5s;  
}

.selected {
    box-shadow: 0 0 0 3px blue;
}

.new {
    box-shadow: 0 0 0 3px green;
}

.merged {
    box-shadow: 0 0 0 5px black;
}

label {
    font-size: 18px;
}