@font-face {
  font-family: "sans-thin" ;
  src: url(source-sans-pro/SourceSansPro-ExtraLight.ttf);
}
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  
  html, body {
    height: 100%;
  }
  
  body {
    overflow-y: scroll;
  }
  

  #wrapper {
    display: grid;
    grid-template-columns: minmax(0px, 1fr) repeat(6, minmax(75px, 1fr)) minmax(0px, 1fr);
    grid-template-rows: 950px 650px 1200px 1200px 650px; 
  }


  .header {
    grid-template-columns: minmax(0px, 1fr) repeat(6, minmax(75px, 1fr)) minmax(0px, 1fr);
    height: 100px;
    width: 100%;
    display: grid;
    background-color: rgba(0, 0, 0, .5);
    position: fixed;   
  }

  .inner_header{
    grid-column: 2 / 8 ;
    height: 100px;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .navigation {
    height: 100%;
    width: 100%;
    margin: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
  }

  .navigation a:hover {
    background-color: rgba(0, 0, 0, .6);
  }

  .navigation a{
    display: flex;
    height: 100%;
    width: 20%;
    padding: 20px;
    vertical-align: middle;
    color: white;
    font-size: 30px;
    font-family: "sans-thin";
    justify-content: center;
    align-items: center;
  }

  #id {
    grid-column: 1;
  }

    #home {
    background-color:rgb(173,173,173);
    grid-column: 1 / -1;
    background-image: url(personalpage/home.jpg);
    background-size: cover;
  }
   #home h3 {
    color: white;
    text-align: center;
    top: 390px;
    width: 100%;
    font-size: 60px;
   }
  #home h1 {
    color: white;
    text-align: center;
    font-size: 85px;
    margin: auto;
   }

  .namediv {
    width: 50%;
    position: relative;
    top: 300px;
    margin: auto;
    display: flex;
    align-items: center;
  }
  
  .lines {
    width: 20%;
    height: 6px;
    background-color: rgb(255, 255, 255);
    display: block;
  }

  #about {
    background-color: rgb(173,173,173);
    grid-column: 2 / 8;
  }
  
  #project {
    background-color: rgb(173,173,173);
    grid-column: 2 / 8;
    background-image: url(personalpage/project.jpg);
    background-size: cover;
    background-attachment: fixed;
  }
  
  #courses {
    background-color:rgb(173,173,173);
    grid-column: 2 / 8;
    background-image: url(personalpage/course.jpg);
    background-size: cover; 
  }
  
  #contact {
    background-color:rgb(173,173,173);
    grid-column: 2 / 8 ;
  }
  
  #leftcolumn {
    background-color:rgb(173,173,173);
    grid-column: 1 /  2;
    grid-row: 2 / -1;
  }
  
  #rightcolumn {
    background-color: rgb(173,173,173);
    grid-column: 8 / 9;
    grid-row: 2 / -1;
  }

  #homepic {
    background-image: url(personalpage/home.jpg);
  }

  #projectpic {
    background-image: url(personalpage/project.jpg);
  }

  #coursepic {
    background-image: url(personalpage/course.jpg);
  }

  #aboutpic {
    float: right;
  }
  
  .headers {
    font-family: "sans-thin";
    font-size: 60px;
    color: white;
  }
@media only screen and (max-width: 900px) {
    #wrapper{
        grid-template-columns: minmax(0px, 1fr) repeat(6, minmax(100px, 1fr)) minmax(0px, 1fr);
      }
      .header{
      grid-template-columns: minmax(0px, 1fr) repeat(6, minmax(100px, 1fr)) minmax(0px, 1fr);
    }
}

@media screen and (max-width: 600px) {
#leftcolumn {
    display: none;
}

#rightcolumn {
    display: none;
}
}