body{
    text-decoration: none;
    margin: 0;
    margin-top: 0;
    margin-bottom: 0;
}

nav{
  font-family: Arial, Helvetica, sans-serif; 
  font-size: 20px; 
  color: #ffffff;
  background-color: #d3cdcd;
  padding-top: 10px;
  padding-bottom: 10px;
}

nav.ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
  }
  
  li {
    display: inline;
  }

  H1{
    font-family: Arial, Helvetica, sans-serif; 
    font-size: 20px; 
    color: #17679c;
    padding-left: 10px;
  }

  H2{
    font-family:'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
    font-size: 16px; 
    color: #17679c;
    padding-bottom:20px;
    padding-left: 10px;
  }

  H3{
    font-family:'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
    font-size: 24px; 
    color: #bb4111;
    padding-bottom: 10px;
    padding-left: 10px;
  }

  .dato{
    padding-left: 100px;
  }

  #materias{
      background-color:#e0cebd;
      font-family: Verdana, Geneva, Tahoma, sans-serif ;
      padding-top: 40px;
      padding-bottom: 30px;
      padding-left: 10px;
  }

  #propuesta{
    font-family: Arial, Helvetica, sans-serif; 
    font-size: 24px; 
    color: #e27a18;
    padding-left: 100px;
  }

  a{
    text-decoration: none;
  }

  .infouba{
    font-family: Arial, Helvetica, sans-serif;
    font-size: medium;
    font-weight: 600;
    background-color:#e9e6e6;
    padding-top: 40px;
    padding-bottom: 20px;
  }
  
  .mensaje{
    background-color:blue;
    font-family: 'Times New Roman', Times, serif; 
    font-size: medium; 
    color:aliceblue; 
    font-weight: 400; 
    height: 100px; 
  }

  .parrafo{
    padding-top:30px;
    text-align: center; 
  }

  .integrantes{
    padding-left: 40px;
    padding-bottom: 40px;
    font-family: Arial, Helvetica, sans-serif;
    font-size: medium;
  }


  /*Estilo para propuesta*/

  .titulo-principal {
    text-align: center;
    margin-top: 40px;
    margin-bottom: 20px;

}

.contenedor-rectangulos {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.rectangulo {
    width: 300px;
    height: 450px;
    background-color: #ccc;
    margin: 10px;
    text-align: center;
}

.rectangulo h1 {
    margin: 0;
}

.rectangulo button {
  bottom: 50px;
  padding-top: 10PX;
  padding-bottom: 10PX;
  padding-left: 10px;
  border: none;
  background-color: #60a1e7;
  color: #fff;
  cursor: pointer;
}