* {
  box-sizing: border-box;
}
.menu {
  float:left;
  width:20%;
  text-align:center;
}
.menu a {
  background-color:#e5e5e5;
  padding:8px;
  margin-top:7px;
  display:block;
  width:100%;
  color:black;
}
.main {
  float:left;
  width:50%;
  padding:0 1%;
  margin-top: 10%;
}
.right {
    background-color: #ffffff;
    float: left;
    width: 305px;
    margin-left: 0.5%;
    padding: 0px;
    margin-top: 10%;
    text-align: center;
    border: #e5e5e5;
    border-style: solid;
    border-width: thin;
}
.qcduoi {
    background-color: #ffffff;
    float: left;
    width: 647px;
    margin-left: 1%;
    padding: 0px;
    margin-bottom: 1%;
    text-align: center;
    border: #e5e5e5;
    border-style: solid;
    border-width: thin;
}
.footer{
	background-color: #003300;
    text-align: center;
    padding: 3px;
    margin-top: 7px;
    position: fixed;
    width: 100%;
    bottom: 0;
    left: 0;
	color: #ffff06;
}
.header{
	
    position: fixed;
    top: 0;
    left: 0;
	width:100%;
	
}
.logo {
    width: 20%;
    text-transform:uppercase;
    color: #ffff06;
	padding:17px;
    display: block;
	font-size:15pt;
	font-weight:bold;
    float: left;
	background-color: #003300;
	text-align:justify;
}
.ketqua {
    width: 80%;
    background-color: #dddddd;
    color: #008000;
    display: block;
    float: left;
    text-align: right;
	padding:27.5px;
}
@media only screen and (max-width:620px) {
  /* For mobile phones: */
  .menu, .main, .right {
    width:100%;
  }
}