body {
  margin: 0;
  background-image: url("achtergrond.jpg");
  background-size: cover;         /* vult hele scherm */
  background-repeat: no-repeat;   /* geen herhaling */
  background-position: center;    /* mooi gecentreerd */
  background-attachment: fixed;  
  text-align: center;

}

/* ================= */
/* NAVIGATION BAR */
/* ================= */

.topnav {
  background-color: black;
  overflow: hidden;
  position: fixed;
  z-index: 1;
  width: 100%;
  top: 0;
}

/* Titel */
.topnav h1 {
  float: left;
  color: white;
  padding: 8px 15px;
  font-size: 18px;
  text-decoration: none;
}
a,img,button,div{
  user-select: none;
   -webkit-user-drag: none; /* Chrome, Safari */
  -khtml-user-drag: none;  /* oudere Konqueror */
  -moz-user-drag: none;    /* Firefox (werkt niet overal) */
  -o-user-drag: none;      /* Opera (ouder) */   
}
/* Normaal menu links */
.normal-menu a {
  float: left;
  color: white;
  padding: 17px 17px;
  text-decoration: none;
  font-size: 24px;
}

/* Hover effecten */
.topnav a:hover {
 background-color: rgb(23, 205, 195);
}

/* Actieve link */
.topnav a.active {
  background-color: aqua;
  color: white;
}

 .Wisselknop {
  float: right;
  color: white;
  padding: 14px 14px;
  text-decoration: none;
  font-size: 25px;
  
}
.Wisselknop:hover {
    background-color: transparent !important; /* of wat je wilt */ /* behoud originele kleur */
    cursor: pointer; /* blijft klikbaar */
}
/* Hamburger menu dropdown */
 .topnav #hamburgermenu{
  display: none;
 margin-top: 62px;   
  background-color: black;
 
  width: 100%;
  height: 120px;
  text-align: start;
    height: auto;             
  z-index: 2;   
  
 }

#hamburgermenu a {
  color: white;
  text-decoration: none;
  font-size: 24px;
  width: 100%;
  display: block;
  z-index: 3;
}
#hamburgermenu .Wisselknop{
  padding: 0px;
}
/* Hamburger knop */
.hamburgermenu-button {
  position: absolute;
  top: 0px;
  right: 0px;
  display: none;
  justify-content: center;
  align-items: center;
  width: 60px;
  height: 100%;
  max-height: 62px;
  color: white;
  background-color: black;
  font-size: 30px;
  cursor: pointer;
  z-index: 999;
}
#hamburgermenu {
  display: none;
}
#hamburgermenu a:hover{
 background-color: rgb(23, 205, 195);

}

#hamburgermenu.active {
  display: block;
}
.hamburgermenu-button:hover {
 background-color: rgb(23, 205, 195);
}


/* ================ */
/* REST VAN DE CSS */
/* ================ */

h1 {
  text-align: center;
  color: white;
}

h2 {
  color: aquamarine;
}
.icoon{
  color: blue;
}

#container {
  position: absolute;
  top: 350px;
  width: 100%;
  
  background-color: rgb(42, 173, 167);
  border-radius: 50px;
  box-shadow: 5px 5px black;
  text-align: center;
  z-index: 0;
}

#contactformulier {
  position: relative;
  margin-top: 50px;
  width: 300px;
  height: 275px;
  border-radius: 10px;
  justify-content: center;
  justify-self: center;
  background-color: black;
}

.invulvak {
  width: 75%;
  margin-top: 3%;
  margin-bottom: 3%;
}

textarea {
  resize: none;
}

label {
  color: white;
}

#lijn,
#lijn2 {
  position:relative;
  width: 100%;
  height: 1px;
  background-color: aquamarine;
}

#andere-socials {
  width: 100%;
  position: relative;
  margin-top: 50px;
  justify-self: center;
  text-align: center;
}

#voorstukje {
  position: relative;
  width: 100%;
  min-height: 75px;
  margin-top: 60px; /* in plaats van top: 5% */
  background-color: rgb(42, 173, 167);
  border-radius: 8px;
  text-align: center;
  box-sizing: border-box;
}

/* ===================== */
/* RESPONSIVE LAYOUT */
/* ===================== */

@media only screen and (max-width: 720px) {
    #voorstukje {
    height: auto;       /* hoogte past zich aan inhoud aan */
    margin-top: 20px;   /* kleinere marge boven */
    padding: 15px;      /* ruimte binnen het blok */
    border-radius: 8px;
  }
  /* Container aanpassen voor mobiel */
  #container {
    height: 700px;
  }

  /* Verberg normaal menu */
  .normal-menu {
    display: none;
  }

  /* Toon hamburger knop */
  .hamburgermenu-button {
    display: flex;
  }
  .Wisselknop {
    display: none;
  }
}

/* Verberg hamburger menu boven 600px */
@media (min-width: 721px) {
  #hamburgermenu {
    display: none !important;
  }
}