/* general settings for section & subheader */
section,
#subheader {
  -webkit-background-size: 100%;
  -moz-background-size: 100%;
  -o-background-size: 100%;
  background-size: 100%;
}

/* background settings for section */
#section-register {
  background: url(../images/background/3.jpg) fixed;
}
#section-organizacion {
  background: url(../images/background/8.jpeg) fixed;
}
#section-call1 {
  background: url(../images/background/3.jpg) fixed;
}

/* media query */
@media only screen and (max-width: 1199px) {
  section {
    -webkit-background-size: auto 100% !important;
    -moz-background-size: auto 100% !important;
    -o-background-size: auto 100% !important;
    background-size: auto 100% !important;
    background-attachment: scroll !important;
    background-position: center !important;
  }
}