html {
  color: #333;
  font-family: 'IBM Plex Sans',-apple-system,BlinkMacSystemFont,sans-serif;
  line-height: 1.5;
}

main {
  margin: 0 auto;
  max-width: 600px;
  padding: 10% 10% 0;
  width: 80%;
}

h1 {
  color: #4489da;
  font-family: 'IBM Plex Serif',-apple-system,BlinkMacSystemFont,serif;
  font-size: 3rem;
  font-style: italic;
  font-weight: 900;
}

p {
  font-size: 1.2rem;
}

a {
  color: #4489da;
}

.reverse {
  direction: rtl;
  unicode-bidi: bidi-override;
}

html {
  color: #333;
  font-family: 'IBM Plex Sans',-apple-system,BlinkMacSystemFont,sans-serif;
  line-height: 1.5;
}

main {
  margin: 0 auto;
  max-width: 600px;
  padding: 10% 10% 0;
  width: 80%;
}

h1 {
  color: #4489da;
  font-family: 'IBM Plex Serif',-apple-system,BlinkMacSystemFont,serif;
  font-size: 3rem;
  font-style: italic;
  font-weight: 700;
}

p {
  font-size: 1.2rem;
}

a {
  color: #4489da;
}

.reverse {
  direction: rtl;
  unicode-bidi: bidi-override;
}

Correct the IBM Plex Serif weight
Correct the IBM Plex Serif weight
