Personal default style overrides

default-styles.css

body {
  /* edge to edge content */
  margin: 0;
  
  /* system fonts used by github */
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";

  /* flex by default */
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

/* universal inherited box-sizing model*/ 
html {
  box-sizing: border-box;
}
*, *:before, *:after {
  box-sizing: inherit;
}

/* flex by default */
div {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}