body{
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;

}

.container{
    margin: 0 auto;
    text-align: center;
}

#counter{
    font-size: 24px;
}

button{
    font-size: 18px;
    padding: 10px 20px;
    margin: 10px;
}

button:disabled{
    opacity: 0.5;
    cursor: not-allowed;
}