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;
}

/*---------------------------*/


.topnav {
  overflow: hidden;
  border-color: #088F8F;
}
/* Style the search box inside the navigation bar */
.topnav input[type=text] {
  float: right;
  border: solid;
  border-color: #088F8F;
  font-size: 17px;
}

.nav ul {
  list-style: none;
  background-color: #342D7E	;
  text-align: center;
  padding: 0;
}
.nav li {
  font-size: 1.2em;
  line-height: 20px;
  height: 50px;
}

.nav a {
  color: #fff;
  display: block;
  transition: .3s background-color;
}

.nav a:hover {

}
/*background-color: #005f5f;*/
.nav a.active {
  background-color: #fff;
  cursor: default;
}

@media screen and (min-width: 600px) {
  .nav li {
    width: 120px;
    border-bottom: none;
    height: 50px;
    line-height: 50px;
    font-size: 1.2em;
  }

/*  Option 1 - Display Inline */
   .nav li {
    display: inline-block;
    margin-right: -4px;
  }
/*
.nav li {
     float: left;
   }
.nav ul {
     overflow: auto;
     width: 600px;
     margin: 0 auto;
   }
.nav {
     background-color: #088F8F	;
   }
*/
/*---------------------------*/


.container_images {
    display: grid;
    grid-template-columns: 350px 350px;

}

.grid-item1 {
   grid-column-start: 1;
   grid-column-end: 2;
   grid-row-start: 1;
   grid-row-end: 2;
   object-fit: contain;
}
.grid-item2 {
   grid-column-start: 2;
   grid-column-end: 3;
   grid-row-start: 1;
   grid-row-end: 2;
   object-fit: contain;
}

.grid-item3 {
  grid-column-start: 1;
  grid-column-end: 2;
  grid-row-start: 2;
  grid-row-end: 3;
  object-fit: contain;
}

/*---------------------------*/


.container2 {
  display: flex;
  align-items: center;
  justify-content: center

  margin-top: 50px;
  margin-left: 50px;
  margin-right: 50px;
}


img {
  max-width: 100%
}

.image {
  flex-basis: 50%;
  align=right;
}

.text {
  padding-left: 50px;
  padding-right: 50px;
  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;

}



.banner_index_1{
        background-color: #342D7E	;
        height:150px;
    }

.banner_climate {
    /* The image used */
    background-image: url('../images/iStock-1250619731.jpg');
    height: 300px;
    background-size: cover;
    background-position:center;
    }

.banner_climate_s {
        /* The image used */
        background-image: url('../images/iStock-1250619731.jpg');
        height: 150px;
 
        background-position:center 37%;

        }

.banner_astronomy{
      /* The image used */
    background-image: url('../images/iStock-1059629692.jpg');
    height: 300px;
    background-position:center;



    }

.banner_astronomy_s{
          /* The image used */
        background-image: url('../images/iStock-1059629692.jpg');
        height: 150px;
                background-position:70% 30%;

        overflow: hidden;
        margin: 0 auto;
        background-size: cover;

        }

.banner_data_science_s{
        /* The image used */
      background-image: url('../images/iStock-1314761274.jpg');
      height: 150px;
      background-position:center;
             


      }

.banner_data_science{
              /* The image used */
          background-image: url('../images/iStock-1314761274.jpg');
          height: 300px;
          background-position:center
          }

.banner_sile{
    background-image: url('../images/mendirek12.JPG');
    height: 300px;
    background-position:right center
  }


}

.h1astro{
    text-align:center;
    color: white;#A80303;
    text-decoration:none;
}

.h1clim{
    text-align:center;
    color: white;#088F8F;
    text-decoration:none;
}

.h1data{
    text-align:center;
    color: white;#1f54ab;
    text-decoration:none;
}
  .container_link_grid {
    display: grid;
    grid-template-columns: auto auto auto;
    height:50px;
    margin-left: 150px;
    margin-top: 30px;
    margin-bottom: 30px;
    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: 150px;
  margin-bottom: 50px;
  float: left;

}


      .button_tr{
        background-color: none;#4372AA	;#acc3de;
        border-radius: 12px;
        font-size: 14px;
        width: 30px;
        height: 16px;39px;23px;
        text-align: center;
        border: solid;
        border-width: 2px;
        border-color: #4372AA;#088F8F;
        margin-right: 30px;
      }