div {
  font-family: system-ui;
  font-weight: bolder 10px;
  font-size: 17px;
  text-align: justify;
  padding-left: 15%;
  padding-right: 15%;
  padding-top: 10px;
}
.heading {
  font-family: system-ui;
  font-weight: bold;
  font-size: 20px;
  text-align: left;
  padding-left: 0;
}

  .end {
    padding-top: 20px;
    font-family: Trebuchet MS, sans-serif;
    font-size: 14px;
    text-align: left;
  }

.chem {
  padding-top: 150px;
  font-family: system-ui;
  font-weight: bold;
  text-align: right;
  color: #003aa6;
  font-size: 18px;
}

a {
  color: #7d7d7d;
}

hr {
    border: none;
    margin-top: 150px;
    background-color: grey;
    color: grey;
    height: 1px;
}