body {
  margin: 0;
  padding: 0;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: #444;
}

header {
  background-color: #DFB887;
  height: 35px;
  opacity: .9;
  margin-bottom: 200px;
  margin-left: 50px;
  margin-right: 500px;
}

.containertech {
  display: flex;
  align-items: right;
  justify-content: right;
  margin-left: 50px;
  margin-right: 50px;
  width: 500px;
}
img {
  border: 1px solid #ddd;
  border-radius: 4px;
  padding: 5px;
  width: 150px;
}

img:hover {
  box-shadow: 0 0 2px 1px rgba(0, 140, 186, 0.5);
}



.text {
  padding-left: 50px;
  padding-right: 100px;
  align=left;
}

.container3 {
  display: flex;
  align-items: center;
  justify-content: center margin-top: 50px;
  margin-left: 50px;
  margin-right: 50px;
}

.container {
  margin-top: 50px;
  margin-left: 50px;
  margin-right: 50px;
}

.image_cont {
  margin-top: 50px;
  margin-right: 50px;
}

.pub_head {
  margin-left: 50px;
  margin-right: 50px;
}

.paper {
  margin-top: 50px;
  margin-bottom: 50px;
  margin-left: 50px;
  margin-right: 50px;
}



.container_homedir {
  margin-top: 500px;
  margin-bottom: 150px;
  margin-left: 100px;
}

.container_link_grid2 {
  display: grid;
  grid-template-columns: auto auto auto;
  margin-left: 130px;
  margin-top: 30px;
  margin-bottom: 30px;
  flex-basis: 90%;
}


.container_link_grid3 {
  display: grid;
  grid-template-columns: auto auto auto;
  height: 50px;
  width: 650px;
  margin-left: 130px;
  margin-top: 390px;
  margin-bottom: 30px;
  flex-basis: 90%;
}

.container_link_grid {
    display: grid;
    grid-template-columns: auto auto auto;
    height:50px;
    margin-left: 150px;
    margin-top: 150px;

    margin-bottom: 150px;
    float: bottom;
    flex-basis: 90%;
  }
  .item1 {
  }

  a:link {
    color: #4372AA;#75A1D0	;
    font-style: italic;
    background-color: transparent;
    text-decoration: none;
  }

  a:visited {
    color: #4372AA	;
    font-style: italic;
    background-color: transparent;
    text-decoration: none;
  }

  a:hover {
    color: purple;
    background-color: transparent;
    text-decoration: underline;
  }

.footer{
  margin-left: 100px;
  margin-bottom: 50px;
  float: left;


}