body {
  margin-top: 50px;
  text-align: center;
}

#benTrai {
  width: 350px;
  display: inline-block;
  vertical-align: top;
  text-align: left;
}

#benPhai {
  width: 350px;
  height: 250px;
  display: inline-block;
  vertical-align: top;
  margin-left: 15px;
  background-color: #fff5e5;
  text-align: center;
}

fieldset {
  border: 2px solid blue;
  margin-bottom: 8px;
  padding: 15px;
}

legend {
  font-size: 16px;
}

input {
  font-size: 15px;
}

#danhsach {
  margin: 10px 0;
  padding-left: 35px;
}

#danhsach li {
  height: 28px;
  line-height: 28px;
  padding-left: 10px;
  cursor: pointer;
  font-size: 16px;
}

#danhsach li:nth-child(1),
#danhsach li:nth-child(3) {
  background-color: #996699;
}

#danhsach li:nth-child(2),
#danhsach li:nth-child(4) {
  background-color: #99dddd;
}

#ketqua {
  margin-top: 95px;
  font-size: 40px;
  font-weight: bold;
  color: blue;
}