.contenedor {
    padding: 10px;
    margin: 0 100px 20px; /*180*/
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
    width: 760px;
    font-family: arial, sans-serif;
    background: #c6c6c6;
} 

.titulo {
    width: 100%;
}

.subcontenedor {
    margin: 10px 10px 10px 10px;
    padding: 10px 10px 10px 10px;
    background: #fff;
    border-radius: 20px;
    width: 700px;
}

.i_texto {
    padding: 10;
    text-align: left;
    line-height: 140%;
}

.liga {
    font-size: 20px;
    text-decoration: none;
    font-style: italic;
}

.liga:hover {
    background: #c6c6c6;
    color: #fff;
}

.enlace {
  display:inline;
  border: 2px solid rgba(146,208,80,.9);
  padding:2px;
  margin:2px;
  text-decoration: none;
  background: rgba(146,208,80,.5);
  color:#000;
  font-family: arial, sans-serif;
  font-size: 15px;
  border-radius: 4px;
}

.enlace:hover {
  text-decoration:none;
  color: rgba(0,0,0,.6);
  cursor:pointer;
}