.ten-hinh-anh {
  border: 1px solid #fff;
  padding: 5px;
  font-size: 30px;
  font-weight: bold;
  color: #fff !important;
  text-align: center;
  margin-bottom: 10px;
}

.b {
  font-weight: bold;
}

.ten {
  font-size: 25px;
  margin: 5px 5px 5px 0px;
}

.fixed-header {
  position: fixed;
  top: 0;
  margin-bottom: auto;
  padding: 3px;
  background: #000 !important;
  color: #fff !important;
  text-align: left;
  width: 780px;
  border-bottom: 3px solid #fff;
  z-index: 1;
}

.fixed-footer {
  position: fixed;
  bottom: 0;
  margin: auto auto 0 auto;
  padding: 2px;
  background: #000;
  color: #fff;
  text-align: center;
  max-width: 780px;
}

.class-id {
  font-size: 45px !important;
  color: #fff !important;
  display: inline-block;
}

.info {
  margin-top: 75px;
  text-align: center;
  background-repeat: no-repeat; 
  background-position: center center; 
  background-attachment: fixed;
}

.nav {
  font-size: 16px;
  padding: 3px;
  margin-left: 5px;
  display: inline;
}

.nav:hover {
  color: black !important;
  background: #fff;
}

.desc {
}

img {
  max-width: 100%;
}

.ho-so {
  display: inline-block;
  max-width: 128px;
  border: 3px solid #fff;
  text-align: center;
  margin: 4px;
}

.anh-ho-so {
  border: 3px solid #fff;
  margin: -3px -3px 0 -3px;
}

.ten-ho-so {
  margin: 6px 3px 3px 3px;
  font-weight: bold;
  font-size: 15px;
}

.ten-ho-so:hover {
  color: #000;
  background: #fff;
}

.anh-ca-nhan {
  max-width: 400px;
  display: inline-block;
}
.anh-ca-nhan img:hover {
  opacity: 1;
}

.thong-tin-ca-nhan {
  display: inline-block;
  max-width: 100%;
  opacity: 0.9;
}

.anh-ca-nhan img {
  opacity: 0.4;
  border: 1px solid #fff;
}