body {
    margin: 0;
    padding: 0;
    font-family: Arial, Helvetica, sans-serif;
}

#notification {
    position: fixed;
    top: 360px;
    left: 0;
    z-index: 100;
    width: 100%;
    text-align: center;
    pointer-events: none;
    margin: 0;
    padding: 0;
}

    #notification p {
        border-color: #000;
        border-width: 0.5em 0;
        border-style: solid;
        font-size: 2.5em;
        font-weight: bolder;
        line-height: 1;
        margin: 0.5em 0;
        padding: 0.5em;
    }

#game {
    margin: 30px 10px 0;
    padding: 0;
}

@media only screen and (min-width: 768px) {
    #game {
        margin: 50px 33.3% 0 33.3%;
    }

    #notification {
        top: 410px;
    }
}

h1 {
    margin: 0 0 10px;
    padding: 0;
    font-size: 50px;
    line-height: 1;
    width: calc(66.7% - 10px);
}

.meta {
    margin: 0 10px 10px 0;
    float: left;
    width: calc(33.3% - 10px);
}

.counter {
    background-color: #EEEEEE;
}

.meta h2 {
    font-size: 20px;
    line-height: 1;
    margin: 5px;
    padding: 0;
    text-align: center;
}

.meta p {
    margin: 5px;
    padding: 5px;
    background-color: #FFF;
    text-align: center;
}

.meta button {
    width: 100%;
    height: calc(50px + 1em);
    color: #FFF;
    background-color: limegreen;
    border-style: none;
}

#grid {
    clear: both;
}

#grid .block, #restart button {
    cursor: pointer;
}

#grid .block p {
    line-height: 1;
    text-align: center;
    margin: 5px;
}