.blog p {
  text-align: justify;
  font-size: 1em;
}
#line_break {
  border: 1px solid grey;
  width: 100%;
  margin: auto;
}
.blog #title_font {}

.blog #date_font {}
h4 {}

.blog p {
  text-align: justify;
  font-size: 1em;
}
#line_break {
  border: 1px solid grey;
  width: 100%;
  margin: auto;
}
.blog #title_font {}

.blog #date_font {}
h4 {
  font-weight: bold;
}

Change font weight for h4 headings.
Change font weight for h4 headings.
