.div-block {
  flex-flow: column;
  justify-content: center;
  align-items: center;
  width: 100vw;
  height: 100vh;
  display: flex;
}

.heading {
  color: #000;
  text-align: center;
  max-width: 40%;
  font-family: Inconsolata, monospace;
  font-size: 30px;
  font-weight: 700;
  line-height: 30px;
}

@media screen and (max-width: 479px) {
  .div-block {
    padding-left: 10px;
    padding-right: 10px;
  }

  .heading {
    max-width: 80%;
    font-size: 24px;
    line-height: 24px;
  }
}