html, body {
    margin: 0;
    padding: 0;
    height: 100%;        
}

body {
    display: flex;
    justify-content: center;  
    align-items: center;      
    font-family: Arial, sans-serif;
    background: #111;
    color: #fff;
}

.container {
    text-align: center;
}

#counter {
    font-size: 6rem;
    font-weight: bold;
    color: #ff0000;
}

.label {
    font-size: 1.5rem;
}