.loader,
.loader:after {
  border-radius: 50%;
  width: 10em;
  height: 10em;
}

body {
  font-family: 'poppins', sans-serif;
  overflow: hidden;
}

.header
{
    position:fixed;
    height: 30px;
    background-color: rgba(0, 0, 255, 0.421);
    width: 500px;
}

.nav-bar {
  flex: 1;
  box-shadow: rgba(0, 0, 0, 0.35) 0px 2px 10px;  
  display: flex;
  align-items: center;
  padding: 12px 24px;
  background-color: #f8f8f8;
}

.title-search-wagons {
  font-size: 2rem;
  color: #033278;
  align-items: center;
  margin-left: 32.5%;
}

.loader {
  margin: 60px auto;
  font-size: 10px;
  position: relative;
  text-indent: -9999em;
  border-top: 1.1em solid rgba(0, 0, 0, 0.2);
  border-right: 1.1em solid rgba(0, 0, 0, 0.2);
  border-bottom: 1.1em solid rgba(0, 0, 0, 0.2);
  border-left: 1.1em solid #000000;
  -webkit-transform: translateZ(0);
  -ms-transform: translateZ(0);
  transform: translateZ(0);
  -webkit-animation: load8 1.1s infinite linear;
  animation: load8 1.1s infinite linear;
}
@-webkit-keyframes load8 {
  0% {
    -webkit-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  100% {
    -webkit-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}
@keyframes load8 {
  0% {
    -webkit-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  100% {
    -webkit-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}

.main {
  display: none;
}

.center-div {
  margin-top: 2.5%;
  align-items: center;
  justify-content: space-around;
  flex-direction: row;
  display: flex;
}