*{
  padding:0px;
  margin:0px;
  box-sizing: border-box;
  text-align: center;
}

h1{
  padding-top: 80px;
  color: #eff5ff;
  font-size: 3em;
}

h2{
  padding-top: 15px;
  color: white;
  font-size: 22pt;
  float: none;
}

h3{
  padding-top: 20px;
  color: black;
  font-size: 3em;
  opacity: 0.6;
  float: none;
}

P{
  color: #eff5ff;
  padding-top: 20px;
  padding-left: 20%;
  padding-right: 20%;
  padding-bottom: 50px;
  font-size: 2em;
}

body{
  overflow-x: hidden;
}

.highlight{
/*   font-weight: bold; */
/*   font-size: 20pt; */
}

#test{
  font-size:30pt;
}

.clickableText{
  cursor: pointer;
  font-weight: bold;
  text-decoration: underline;
}

#worldcities_svg{
  display: block;
  margin: auto;
  margin-top: 0px;
  padding:0px;
  transition: 0.0s;
}

.button {
  background-color: #383838;
  border: none;
  color: white;
  padding: 15px 32px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 1em;
  border-radius: 50px; 
  -moz-border-radius: 50px; 
  -webkit-border-radius: 50px; 
  display:inline-block;
}

#worldciteies_buttons_div{
  display: block;
  margin: auto;
  margin-top: 0px;
  padding:0px;
}

.button:hover{
  background-color: #e8e8e8;
  color: black;
}

.content{
  position: relative;
}

#header{
  height: 80px;
  width: 100%;
  position: fixed;
  top: 0px;
  margin: 0px;
  z-index: 2;
/*   background-image: linear-gradient(to top, rgba(0,0,0,0), rgba(0,0,0,0.5)); */
/*   background-color:rgba(0, 0, 0, 0.5); */
}


.header_subdiv{
  float: right;
  width: 180px;
  padding: 0px;
  height: 100%;
  vertical-align: middle;
  background-color:rgba(0, 0, 0, 0.7);
}

.header_subdiv_text{
  color: #eecda1;
  font-size: 14pt;
  opacity: 1; 
  margin-top: 30px;
  margin-bottom: auto;
  width: 100%;
  padding: 0px;
  overflow: hidden;
  position: relative;
}

.header_subdiv_text:hover{
  cursor: pointer;
  color: white;
}

#headerTriangle{
  width: 0; 
  height: 0; 
  float: right;
  border-left: 80px solid transparent;
  border-top: 80px solid rgba(0, 0, 0, 0.7);
  
}

#welcomeDiv{
  height: 300px;
  width: 600px;
  display: block;
  position: absolute;
  color: white;
  font-size:20pt;
  line-height: 150px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  
}

#welcomeSubDivTop{
  width: 100%;
  height: 50%;
  background-image: linear-gradient(to bottom, rgba(0,0,0,0), rgba(0,0,0,0.7));
  font-weight: bold;
  font-size: 35pt;
}

#welcomeSubDivLeft{
  float: left;
  width: 50%;
  height: 50%;
  background-image: linear-gradient(to top, rgba(0,0,0,0), rgba(0,0,0,0.7));
  border-right: 1px solid white;
  border-top: 2px solid white;
}

#welcomeSubDivRight{
  float: left;
  width: 50%;
  height: 50%;
  background-image: linear-gradient(to top, rgba(0,0,0,0), rgba(0,0,0,0.7));
  border-left: 1px solid white;
  border-top: 2px solid white;
}

#content_1{
  background-color: #828a96;
  text-align: center;
  float: none;
  overflow:auto;
}

#content_1 > p{
  font-size: 16pt;
  text-align: left;
}

#content_2{
  background-color: #828a96;
}

.background{
  top: 0px;
  background-attachment: fixed;
  position: relative;
}

#background_1{
  background-image: url('pictures/selfie.jpg');
  background-size: cover;
  height: calc(100vh + 80px);
  background-position: center;
  padding-bottom: 80px;
}

#background_2{
  background-image: url('pictures/zeist_view.jpg');
  background-size: cover;
  height: auto;
  background-position: center;
  padding-top: 80px;
  padding-bottom: 80px;
  
}

.diagonalBottom{
  border-right: 200vw solid transparent;
  border-top: 80px solid rgba(130, 138, 150, 1.0);
  position: absolute;
  z-index: 1;
/*   width: 100%; */
}

.diagonalTop{
  border-left: 200vw solid transparent;
  border-bottom: 80px solid rgba(130, 138, 150, 1.0);
  position: absolute;
  z-index: 1;
/*   width: 100%; */
}

.tropic_gridline{
  overflow: visible;
}

#disclaimer{
  font-size: 1.5em;
  color:white;
}

.worldcities_svg_div{
  /*height: 500px;*/
  position: r;
  
}

.worldcities_buttons_div{
  height: 1px;
  position: relative;
  overflow: hidden;
  
}

.project_img{
    border-radius: 49%;
    opacity: 1;
    transition: 0.0s;
    display:block;
    margin-left: auto;
    margin-right: auto;
  
}

.project_img:hover{
    opacity: 1;
}

.project_div{
  /*display: inline-block;*/
  float: left;
  margin: 0px;
  padding-top: 0px;
  padding-bottom: 0px;
  padding-left: 10px;
  padding-right: 10px;
  width: 430px;
  height: 500px;
  overflow: hidden;
}

#projectsdiv{
  overflow:hidden; 
  margin-left: auto;
  margin-right: auto;
  margin-top: 50px;
  margin-bottom: 50px;
  width: 1320px;
  height: 440px;
  padding: 5px;
  padding-bottom: 0px;
}

#worldcities_hover_over{
  width: 402px;
  height: 302px;
  border-radius: 49%;
  transition: 0.0s;
  transform: translate(0px, -301px);
  background-color: white;
  opacity: 0.0;
  display: inline-block;
  position: relative;
  overflow:hidden;
}

#worldcities_hover_over:hover{
  background-color: white;
  opacity: 0.65;
  cursor: pointer;
}

#flights_hover_over{
  width: 402px;
  height: 302px;
  border-radius: 49%;
  transition: 0.0s;
  transform: translate(0px, -301px);
  background-color: white;
  opacity: 0.0;
  display: inline-block;
  position: relative;
  overflow:hidden;
}

#flights_hover_over:hover{
  background-color: white;
  opacity: 0.65;
  cursor: pointer;
}

.hover_over_div{
  width: 402px;
  height: 302px;
  border-radius: 49%;
  transition: 0.0s;
  transform: translate(0px, -301px);
  background-color: white;
  opacity: 0.0;
  display: inline-block;
  position: relative;
  overflow:hidden;
  cursor: pointer;
}

.thesis_img:hover{
  cursor: pointer;
}

.hover_over_div:hover{
  background-color: white;
  opacity: 0.65;
}

.hover_over_text{
  padding-top: 25%;
  padding-bottom: 40%;
  color: #b41eff;
  position: relative;
}

#flights_hover_over_text{
  padding-top: 25%;
  padding-bottom: 40%;
  color: #b41eff;
}

#linDif_hover_over_text{
  padding-top: 5%;
  padding-bottom: 40%;
  color: #b41eff;
}

#worldcities_hover_over_text{
  padding-top: 18%;
  padding-bottom: 40%;
  color: #b41eff;
}

#hide_worldciteies_script{
  height: 0px;
  width: 0px;
  /*width: 900px;*/
  display: block;
  margin:auto;
  background: #383838;
  transform: translate(0px, 16px);
  overflow:hidden;
  transition: 0.4s;
  
}
#hide_worldciteies_script:hover{
  background: #e8e8e8;
}

#worldcities_Script_text{
  margin: 0px;
  padding: 5px;
}

#linDif_div{
  height: 0px;
  width: 70%;
  margin: 0 auto;
  min-width: 900px;
  overflow: hidden;
  font-size: 8px;
}

.download_btn{
  background-color: RoyalBlue;
  border: none;
  color: white;
  padding: 12px 30px;
  cursor: pointer;
  font-size: 20px;
  position: relative;
}

.download_btn:hover {
  background-color: DodgerBlue;
}

.uparrow{
  display: block;
  margin: auto;
  padding: 2px;
}