body{
    background-color: #660000ee;
}

header{
    background-color: #1B1B1B;
}  

nav{
    width: 100%;
  }
  
  nav div{
    text-align: center;
    font-size: large;
    font-weight: bold;
    display: inline-block;
    width: 22%;
    padding: 10px;
  }
  
  nav div:hover {
    background-color: rgb(68, 66, 66);
    height: 20px;
  }
  
  a:active
  {
    background-color:#660000;
  }
  
  a{
    color: white;
    text-decoration: none;
  }

  h1{
    text-align: center;
    color: white;
    font-weight: bolder;
  }

h2{
    text-align: center;
    color: white;
}

  .video {
    width: 100%;
    text-align: center;
    padding: 5%;
}

.titclas {
    text-align: center;
    font-size: 20px;
    font-weight: bolder;
}

.titdoc {
    text-align: center;
    font-size: large;
    font-weight: bolder;
    font-size: 20px;
}

.documento {
    text-align: center;
}

.trabclas{
    text-align: center;
}

#linkdoc:hover{
    color: #1B1B1B;
}

#linkclas:hover{
    color: #1B1B1B;
}