#principal {
  background-image: url(../img/Lolgin1.jpg);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  max-width: 100%;
  background-attachment: fixed;
}
#logo_sma {
  width: 300px;
  height: 100px;
  margin-top: 20px;
}
#section_logo {
  width: 100%;
}
#div_1 {
  width: 0px;
}
#contenedor_form.container {
  background-color: #fff;
  width: 300px;
  padding-top: 15px;
  padding-bottom: 15px;
  border-radius: 10px;
  margin-top: 100px;
}
#titulo_login {
  text-align: center;
  color: #3383ec;
  margin-bottom: 30px;
}
#politica_privacidad {
  color: #a5a0a0;
}
#politica_privacidad:hover {
  color: #3383ec;
}
#logo_sociedad {
  width: 100px;
  margin-top: 30px;
  margin-bottom: 10px;
}
a.sma {
  color: #a5a0a0;
  font-size: 12px;
}
a.sma:hover {
  color: #3383ec;
}
#institucionales {
  margin-top: 50px;
  margin-bottom: 20px;
}
img.logo_institucional {
  width: 100px;
  margin-right: 15px;
}

/* --- @ medias */

/* --- Minimo 576px - sm --- */
@media (min-width: 576px) {
  #div_1 {
    width: 300px;
  }
  #contenedor_form.container {
    width: 400px;
  }
}

/* --- Minimo 768px - md --- */
@media (min-width: 768px) {
  #div_1 {
    width: 600px;
  }
  #contenedor_form.container {
    width: 500px;
  }
}

/* --- Minimo 992px - lg --- */
@media (min-width: 992px) {
  #div_1 {
    width: 1200px;
  }
  #contenedor_form.container {
    width: 700px;
  }
  a.sma {
    font-size: 16px;
  }
}

/* --- Minimo 1200px - xl --- */
@media (min-width: 1200px) {
  #div_1 {
    width: 2000px;
  }
  #contenedor_form.container {
    width: 900px;
  }
  width: 450px;
  height: 150px;
  margin-top: 20px;
}

/* --- Minimo 1400px - xl --- */
@media (min-width: 1400px) {
  #div_1 {
    width: 3000px;
  }
  #contenedor_form.container {
    width: 1400px;
  }
}