Answers for "CSS Text Fill Property"

css font face

@font-face {
  // Defining what the font will be called
  font-family: thisSpecialFont;
  // Linking to the font file
  src: url(linkToFontFile.woff);
}
body {
  font-family: thisSpecialFont;
}

css fill parent height

html, body {
  height: 100%
}
body {
  display: flex;
  align-items: stretch;
}

#root {
  width: 100%
}