.letter::after { content: "21"; z-index: 0; }
.letter > * { position: relative; z-index: 1; }
.letter-body { max-width: 830px; }
.letter-body p { margin: 0 0 1.25em; line-height: 2; font-size: 17px; }
.letter-body .meet-again { margin-top: 2.2em; font-size: 22px; font-weight: 900; }
.letter .signature { display: inline-block; border-top: 2px solid rgba(17,24,39,.55); padding-top: 14px; }
@media (max-width: 560px) {
  .letter-body p { font-size: 15px; line-height: 1.9; }
  .letter-body .meet-again { font-size: 19px; }
}