styles.css

body {
    background-color: #000000;
    color: #fafafafa;
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 20px;
}

#logo {
  float: left;
	  display: inline-block;
}
/* Menu */
/*Strip the ul of padding and list styling*/
nav {
    width: 100%;
    height: 2.5em;
}

#menu {
    list-style-type:none;
    margin:0;
    padding:0;
    text-align: center;
}
/*Create a horizontal list with spacing*/
.menuitem {
    display:inline-block;
    margin-right: 1px;
}
/*Style for menu links*/
.menuitem a {
    display:block;
    min-width:140px;
    height: 50px;
    text-align: center;
    line-height: 50px;
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    color: #fff;
    text-decoration: none;
    background-color: rgba(0,0,0,.5);
}
.current {
    background: rgba(200,200,200, .1);
}
/*Hover state for top level links*/
.menuitem:hover a {
    background: rgba(200,200,200, .1);
}
/*Style for dropdown links*/
.menuitem:hover ul a {
    background: #f3f3f3;
    color: #2f3036;
    height: 40px;
    line-height: 40px;
}
/*Hover state for dropdown links*/
.menuitem:hover ul a:hover {
    background: rgba(200,200,200, .1);
    color: #fff;
}
/*Hide dropdown links until they are needed*/
.menuitem ul {
    display: none;
}
/*Make dropdown links vertical*/
.menuitem ul li {
    display: block;
    float: none;
}
/*Prevent text wrapping*/
li ul li a {
    width: auto;
    min-width: 100px;
    padding: 0 20px;
}
/*Display the dropdown on hover*/
ul li a:hover + .hidden, .hidden:hover {
    display: block;
}
/*Style 'show menu' label button and hide it by default*/
.show-menu {
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    text-decoration: none;
    color: #fff;
    background: #390000; 
    text-align: center;
    padding: 10px 0;
    display: none;
}
/*Hide checkbox*/
#show-menu {
    display: none;
}
/*Show menu when invisible checkbox is checked*/
#show-menu:checked ~ #menu{
    display: block;
}

@media screen and (max-width : 760px){
    ul#menu {
        position: static;
        display: none;
    }
    ul#menu li {
        margin-bottom: 1px;
    }
    ul li, li a {
        width: 100%;
    }
    .show-menu {
        display:block;
    }
    .menuitem {
        float: left;
    }
    
}

.intro {
    width: 100%;
    height: calc(100vh - 4em);
    box-sizing: border-box;
    background-image: url('/images/intro.jpg');
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center top;
}   
.content {
    top: 3em;
    width: 100%;
}
@keyframes fade-in {
    from {opacity:0;}
    to {opacity:1;}
}
// setlist
h1{
    font-size: 2em; /* 25px/16px */
}
#content
{
    width: 100%; /* 650/960 */
    max-width: 960px;
    text-align: middle;
    margin: auto; /*auto centers the container */
}
.linklist{
    list-style-type:none;
}

.linklist li {
    display: inline-block;
    padding: 1em;
}

/*CSS3 multiple columns.*/
/* Get em size for colums: 184/16 */   
.setlist
{   
    -moz-column-width: 11.5em; /* Firefox */
    -webkit-column-width: 11.5em; /* webkit, Safari, Chrome */
    column-width: 11.5em;
}
/*remove standard list and bullet formatting from ul*/
.setlist ul
{
    margin: 0;
    padding: 0;
    list-style-type: none;
}
/* correct webkit/chrome uneven margin on the first column*/
.setlist ul li:first-child
{
    margin-top:0px;
}




// imageviewer
.imageviewer.a {
  text-decoration: none;
  cursor: pointer;
  animation: pulse 2s ease infinite;
  border: 1px solid black;
  padding: 10px;
  color: #F7FFF1;
}
.imageviewer.img {
  width: 50%;
  display: none;
  opacity: 0;
  animation: fadeThatDisplay 1s;
  &.is-visible {
    display: block;
    opacity: 1;
    box-shadow: 0px 0px 14px #aaa;
  }
}
.imageviewer.next, .imageviewer.prev {
  color: #F7FFF1;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0px;
  border-top: 17px solid transparent;
  border-bottom: 17px solid transparent;
}
.imageviewer.next {
  right: 0px;
  margin-right: 10px;
  border-right: 17px solid transparent;
  border-left: 17px solid #F7FFF1;
}
.imageviewer.prev {
  left: 0px;
  margin-left: 10px;
  border-right: 17px solid #F7FFF1;
  border-left: 17px solid transparent;
}
.imageviewer.close {
  color: white;
  font-size: 24px;
  font-family: sans-serif;
  position: absolute;
  top: -45px;
  left: 74%;
  cursor: pointer;
}
.imageviewer.container {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}
imageviewer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background-color: rgba(0,0,0,.9);
  display: flex;
  justify-content: center;
  align-items: center;
  transform: scale3d(0,0,0);
  transition: all .5s ease-in-out;
  &.is-visible {
    transform: scale3d(1,1,1);
  }
}

@keyframes fadeThatDisplay {
  0% {
    display: none;
    opacity: 0;
  }
  100% {
    display: block;
    opacity: 1;
  }
}
@keyframes pulse {
  0%, 100% {
    -webkit-transform: scale(1.0);
    transform: scale(1.0);
  }
  50% {
    -webkit-transform: scale(1.1);
    transform: scale(1.1);
    box-shadow: 0px 0px 10px black;
  }
}


/* foto slider */
* {
	box-sizing: border-box;
}
*/* Position the image container (needed to position the left and right arrows) */
.container {
  position: relative;
}

.mySlides img {
	display: block;
	margin-left: auto;
	margin-right: auto;
}
/* Next & previous buttons */
.prev,
.next {
  cursor: pointer;
  position: absolute;
  top: 40%;
  width: auto;
  padding: 16px;
  margin-top: -50px;
  color: white;
  font-weight: bold;
  font-size: 20px;
  border-radius: 0 3px 3px 0;
  user-select: none;
  -webkit-user-select: none;
}

/* 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, 0.8);
}