* {
    box-sizing: border-box;
  }
  
  :root {
    --nav: 1.5em;
    --h1: 3em;
    --h2: 2em;
    --h3: 1.5em;
    --p: 1.25em;
    --yellow: #fbd52b;
    --black: rgb(0, 0, 0);
    --red: rgb(255, 0, 0);
    --white: rgb(255, 255, 255);
  }
  
  body {
    max-width: 100%;
  }
  
  /*scrollbar*/
  
  ::-webkit-scrollbar {
    /* width */
    width: 0.5em;
  }
  
  ::-webkit-scrollbar-track {
    /* Track */
    background: var(--yellow);
  }
  
  ::-webkit-scrollbar-thumb {
    /* Handle */
    background: var(--red);
  }
  
  ::-webkit-scrollbar-thumb:hover {
    /* Handle on hover */
    background: var(--black);
  }
  
  body {
    font-family: "Smooch Sans"; /*smooth sans*/
  }
  
  .burger {
    display: none;
  }
  #burger {
    display: none;
  }
  /* navigatie */
  
  nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 2em;
    background-color: var(--white);
    border-radius: 150px 56px 56px 150px;
    background-color: var(--white);
    padding-right: 2em;
    box-shadow: 0px 0px 15px 5px rgba(0, 0, 0, 0.2);
  }
  
  nav img {
    width: 5em;
    border-radius: 50%;
  }
  
  .subnav {
    list-style-type: none;
    display: flex;
    margin: 0;
    align-items: center;
  }
  
  .subnav li a {
    text-decoration: none;
    color: var(--black);
    padding: 0.5em 0.5em;
    font-size: var(--nav);
  }
  
  .subnav li a:hover {
    color: var(--red);
  }
  
  .subnav li:first-child a {
    color: var(--red);
  }
  
  .contact {
    font-size: var(--nav);
    text-decoration: none;
    font-weight: bold;
    color: var(--yellow);
    background-color: var(--red);
    padding: 0.4em 1.8em;
    border-radius: 0.5em;
    margin-left: 1em;
    border: 1px solid transparent;
    transition: background-color 0.3s, color 0.3s, border-color 0.3s;
  }
  
  .contact:hover {
    color: var(--red);
    background-color: white;
    border-color: var(--red);
  }
  
  /*header*/
  
  .intro {
    display: grid;
    grid-template-columns: 50% 50%;
    background-color: var(--yellow);
    max-width: 100%;
    border-radius: 1em;
    margin: 2em;
    align-items: center;
    box-shadow: 0px 0px 15px 5px rgba(0, 0, 0, 0.2);
  
    /* Verticaal centreren van items */
  }
  
  .introtekst {
    margin: 2em;
    text-align: center;
  }
  
  .introtekst h1 {
    font-size: clamp(32px, 32px + 2vw, 56px);
  }
  
  .introtekst h2 {
    font-size: clamp(20px, 20px + 2vw, 40px);
  }
  
  .intro img {
    width: 80%;
    margin: 2em;
    border-radius: 1em;
  }
  
  /* main */
  
  main section {
    margin: 2em;
    background-color: var(--yellow);
    box-shadow: 0px 0px 15px 5px rgba(0, 0, 0, 0.2);
    padding: 0.5em 2em 2em 2em;
    border-radius: 1em;
  }
  
  .rood-vierkant {
    display: inline-block;
    width: 3em;
    height: 0.3em;
    background-color: red;
    margin-top: -5em;
  }
  
  .welkom h3,
  .kennis h3 {
    margin-bottom: -0.5em;
    font-size: var(--h3);
  }
  
  .welkom p {
    font-size: var(--p);
  }
  
  .folder {
    color: var(--red);
  }
  
  .kennis p {
    font-size: var(--p);
  }
  
  .cijfers {
    flex-direction: row;
    display: flex;
    justify-content: center;
    margin-top: 2em;
  }
  
  .cijfers span {
    background-color: var(--red);
    margin: 0 10%;
    padding: 1.6em 2em;
    border-radius: 50%;
    text-align: center;
  }
  
  .cijfers span div {
    font-size: 1.5em;
    font-weight: bold;
  }
  
  .facebook-container {
    text-align: center;
    margin-top: 1.5em;
  }
  
  .facebook-container iframe {
    border-radius: 0.25em;
  }
  
  /* footer */
  
  footer p {
    text-align: center;
    margin: 0 0.5em;
    margin-bottom: 1em;
    font-size: var(--p);
  }
  
  footer {
    border-top-right-radius: 50px;
    background-color: black;
    color: #e9f200;
    padding: 0.5em;
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
  }
  
  footer div h3 {
    font-size: var(--h3);
    margin-bottom: 0em;
    text-align: center;
    margin-bottom: 0.5em;
  }
  
  footer div p {
    font-size: var(--p);
  }
  
  @media only screen and (min-width: 1220px) {
    .intro,
    main section {
      margin-left: 15%;
      margin-right: 15%;
    }
  
    footer {
      padding-left: 15%;
      padding-right: 15%;
    }
  }
  
  @media only screen and (max-width: 900px) {
    .intro {
      display: grid;
      grid-template-columns: 1fr;
    }
  
    .intro img {
      margin: -2em 1em 1em 1em;
      display: flex;
      justify-content: center;
      width: 95%;
      margin-top: -2em;
    }
  
    /*burger */
    .burger {
      display: block;
      font-size: 2.5em;
      cursor: pointer;
      margin: 0.5em -0.05em;
      position: relative;
      top: -1em;
    }
  
    .subnav {
      display: flex;
      flex-direction: column;
      position: absolute;
      align-items: start;
      background-color: #fff;
      width: 100%;
      left: -100%;
      transition: all 0.3s ease-out;
      top: 4em;
      padding: 0em 0 2em 0;
    }
  
    .subnav li {
      padding: 1em;
      position: relative;
    }
  
    .contact {
      margin-left: 2em;
      margin-top: 0.5em;
    }
  
    #burger:checked ~ .subnav {
      left: 0;
    }
  
    nav img {
      display: none;
    }
  
    nav {
      box-shadow: none;
      margin-bottom: -4.5em;
    }
  
    .facebook-container iframe {
      width: 100%;
    }
  
    .facebook-container {
      width: 100%;
      height: auto;
      display: flex;
      justify-content: center;
    }
  
    footer {
      display: grid;
      grid-template-columns: 1fr;
    }
  }
  
  @media only screen and (max-width: 500px) {
    .cijfers {
      display: grid;
      grid-template-rows: 1fr 1fr 1fr;
    }
  
    .cijfers span {
      margin-bottom: 1em;
    }
  }
  
  @media only screen and (max-width: 600px) {
    .foto {
      margin-right: 1em;
    }
  
    .intro {
      padding-right: 1em;
      /* Verticaal centreren van items */
    }
  }