@font-face {
    font-family: 'Oxygen';
    font-style: normal;
    font-weight: 300;
    font-display: swap;
    src: url(https://fonts.is-hw.de/oxygen/oxygen-300.eot);
    src: url(https://fonts.is-hw.de/oxygen/oxygen-300.eot?#iefix) format('embedded-opentype'),
         url(https://fonts.is-hw.de/oxygen/oxygen-300.woff2) format('woff2'),
         url(https://fonts.is-hw.de/oxygen/oxygen-300.woff) format('woff'),
         url(https://fonts.is-hw.de/oxygen/oxygen-300.ttf) format('truetype'),
         url(https://fonts.is-hw.de/oxygen/oxygen-300.svg#Oxygen) format('svg');
}