* {
    box-sizing: border-box;
  }

  :root{
    --color1: #ffffff;
    --color2: #195f5f;
    --color3: #2facac;
  }

  body {
    padding: 5px;
    max-width: 1500px;
    background-image: linear-gradient(to bottom, var(--color3), var(--color1) 80%);
    background-repeat: no-repeat;
    margin: auto;
    color: var(--color1);
  }

  h1{
    text-align: left;
    padding-left: 2%;
    border-top: var(--color1);
    font-family: 'Brush Script MT', 'Times New Roman', 'serif';
  }

  h2{
    text-align:left;
  }

  div {
    background-color: var(--color2);
    margin: 5px;
    padding: 2px;
  }

  a {
    cursor: pointer;
    color: var(--color1);
  }

  img {
    width: 100%;
  }

  button {
    background-color: var(--color1);
    color: var(--color2);
    cursor: pointer;
  }
  
  button:hover {
    background-color: var(--color2);
    color: var(--color1);
  }

  .active {
    background-color: var(--color3);
    color: var(--color1);
  }

  button:active {
    background-color: var(--color3);
    color: var(--color1);
  }

  .header{
    text-align: center;
  }

  .ueber{
    padding: 10px;
    background-color: var(--color3);
  }

  .blogpost{
    background-color: var(--color2);
    padding-left: 10px;
    padding-right: 10px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 15px;
    display:none;
  }

  .blogpost img{
    margin-left: auto;
    margin-right: auto;
  }

  .blogpost div{
    margin:0;
    padding:0;
  }

  .blogpost button{
    float:right;
  }

  .filter{
    margin-top: 0px;
    margin-bottom: 0px;
  }

  .content img{
    aspect-ratio: 3/2;
  }

  .filter {
    float: left;
  }

  /* Create five equal columns that floats next to each other */
  .bild {
    float: left;
    width: 23%;
    min-width: 150px;
    display: none;  /*Hide columns by default */
    margin: 10px;
  }
  
  /* Clear floats after rows */
  .row:after {
    content: "";
    display: table;
    clear: both;
  }
  
  /* Content */
  .content {
    background-color: white;
    padding: 5px;
  }
  
  /* The "show" class is added to the filtered elements */
  .show {
    display: block;
  }

  /*LIGHTBOX von https://codepen.io/gschier/pen/kyRXVx*/

  .lightbox {
    /* Default to hidden */
    display: none;
  
    /* Overlay entire screen */
    position: fixed;
    z-index: 999;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    
    /* A bit of padding around image */
    padding: 1em;
  
    /* Translucent background */
    background: rgba(0, 0, 0, 0.8);
  }
  
  /* Unhide the lightbox when it's the target */
  .lightbox:target {
    display: block;
  }
  
  .lightbox span {
    /* Full width and height */
    display: block;
    width: 100%;
    height: 100%;
  
    /* Size and position background image */
    background-position: center;
    background-repeat: no-repeat;
    background-size: contain;
  }