/* Maak de selector specifieker zodat deze wint van body-stijlen */
body footer { 
    box-sizing: border-box;
    position: absolute;
    width: 100%;
    bottom: 0px;
    left: 0px;
    padding-top: 30px;
    height: 125px;
    background-color: black;
    font-size: 20px; /* Dit zou nu moeten werken */
    font-family: -apple-system, BlinkMacSystemFont, "segoe ui", roboto, oxygen, ubuntu, cantarell, "fira sans", "droid sans", "helvetica neue", Arial, sans-serif;
    text-align: center;
    border-top: 1px solid red;
    animation: blink 5s infinite;
}

/* Zorg dat de tekst binnen de footer de grootte overerft */
body footer p, 
body footer p2 {
    font-size: inherit; 
    box-sizing: border-box;
}

body footer p {
    color: red;
    margin-top: -10px;
}

body footer p2 {
    color: white;
    display: inline-block; /* p2 is geen standaard block element */
}