body,
html {
    height: 100%;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: Arial, sans-serif;
}

#contador {
    font-size: 22.5vw;
    color: white;
    font-family: 'Orbitron', sans-serif;
    /* a bit of black text shadow */
    text-shadow: 2px 2px 4px #000000;
}

.blink {
    animation: blink-animation 1s steps(5, start) infinite;
}

@keyframes blink-animation {
    to {
        visibility: hidden;
    }
}