* {
box-sizing: border-box
}

body {
font-family: Verdana, sans-serif; margin:0;
margin: 0;
  background-color: #000035;
  background-image: url(../Plaatjes/BG/BG09_G.jpg);
}

.mySlides {display: none}

img {vertical-align: middle;}


/* Slideshow container */
.slideshow-container {
  max-width: 1000px;
  position: relative;
  margin: auto;
}
<!--  -->
/* Next & previous buttons */
.prev, .next {
  cursor: pointer;
  position: absolute;
  top: 50%;
  width: auto;
  padding: 16px;
  margin-top: 0px;
  color: white;
  font-weight: bold;
  font-size: 18px;
  transition: 0.2s ease;
  border-radius: 0 3px 3px 0;
  /*user-select: none;*/
  background-color: rgba(0,0,0,0.3);
   -webkit-user-select: none; /* Safari */
  -ms-user-select: none; /* IE 10 and IE 11 */
  user-select: none; /* Standard syntax */
}
  

/* Position the "next button" to the right */
.next {
  right: 0;
  border-radius: 3px 0 0 3px;
}

/* On hover, add a black background color with a little bit see-through */
.prev:hover, .next:hover {
  background-color: rgba(0,0,0,0.5);
}
  
/* Caption text */
.text {
  color: black;
  font-size: 15px;
  padding: 8px 12px;
  position: absolute;
  bottom: 8px;
  width: 100%;
  text-align: center;
}

/* The dots/bullets/indicators */
.dot {
  cursor: pointer;
  height: 15px;
  width: 15px;
  margin: 0 2px;
  background-color: #ddd;
  border-radius: 50%;
  display: inline-block;
  transition: background-color 0.2s ease;
}

.active, .dot:hover {
  background-color: #ff0000;
}

/* Fading animation */
.fade {
  animation-name: fade;
  animation-duration: 0s;
}
/*
@keyframes fade {
  from {opacity: 1} 
  to {opacity: 1}
}*/

/* On smaller screens, decrease text size */
@media only screen and (max-width: 850px) {
  .prev, .next,.txt {font-size: 14px}
}
@media only screen and (max-width: 650px) {
  .prev, .next,.txt {font-size: 12px}
} 
@media only screen and (max-width: 550px) {
  .prev, .next,.txt {font-size: 11px}
}    

.txt2{
font-size: 26px;

}



.Centreer{
display: table;
 margin-left: auto;
 margin-right: auto;
}
.MiddenLijnen {
text-align: center;

/*-----------------Kolombreedtes--------------------*/

.Kolom1000{
   width: 100%;
padding: 50px;
}
@media only screen and (min-width: 1020px) {
  div.Kolom1000{
  width: 1000px;
  }
}