body {
    background: #111;
    color: #fff;
    font-family: Arial;
    text-align: center;
}

h1 {
    margin-top: 20px;
}

#prices {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 20px;
}

.coin-box {
    background: #222;
    padding: 15px;
    margin: 10px;
    border-radius: 10px;
    width: 140px;
}