h2,
th {
  color: rgb(174, 105, 239);
  font-style: bold;
  font-family: Cambria, Cochin, Georgia, Times, "Times New Roman", serif;
  /* Chuyển hoa thường (muốn ghi chú nhấn ctrl + / gần phím shift */
  text-transform: capitalize;
  text-align: left;
  font-size: 18px;
  opacity: 1;
}
#doanvan2 {
  color: aquamarine;
}
.ul_1 {
  list-style: circle;
}
h2.demo {
  color: blue;
}
p,
.demo {
  font-size: medium;
}
div p {
  color: aqua;
}
.highlight:active {
  background-color: chartreuse;
}
.ig:link {
  color: brown;
}
.ig:visited {
  color: rgb(219, 18, 179);
}
.elm:empty {
  width: 200px;
  height: 200px;
  background-color: beige;
}