body {
    font-family: "Arial", sans-serif;
}

section {
    text-align: center;
}

.game--title {
    font-size: 30px;
}

.game--container {
    display: grid;
    grid-template-columns: repeat(3, auto);
    width: 306px;
    margin: 50px auto;
    
}

.cell {
    font-family: "Permanent Marker", cursive;
    width: 100px;
    height: 100px;
    box-shadow: 0 0 0 1px #29afa4;
    border: 1px solid #29afa4;
    cursor: pointer;
    line-height: 100px;
    font-size: 60px;
    background-color: #eee;
    border-radius: 5px;
    margin: 4px;
}

button {
    padding: 12px 16px;
    border: none;
    border-radius: 12px;
    font-size: 22px;
    cursor: pointer;
}

button + button {
    margin-left: 12px;
}

.X {
    color:  #2cb9ab;
}

.O {
    color: #170f23;
}

.game--restart {
    display: none;
}

.level {
    width: 110px;
    height: 50px;
}

.started .start,
.started .level {
    display: none;
}

.started .game--restart {
    display: inline-block;
}