#derecha {
   width: 100%;
   border: 1px;
   height: auto;
   overflow: hidden;
}

#izquierda {
   width: 490px;
}

.page-title,
.social-networks-container {
   margin: 0 auto;
   padding-top: 32px;
}

.social-networks-container ul {
   padding: 0px;
   margin: 20px 50px;
   list-style: none;
   display: flex;
   justify-content: space-evenly;
}

.iframe-form-container {
   display: flex; /** Get more deeper into this concept,is really usefull**/
   flex-wrap: nowrap;
   justify-content: center; /** Then we place the elements (form) and (iframe) in the center**/
}