/* colors */
:root {
  --black: #000000;
  --grey: #dbdbdb;
  --white: #ffffff;

  --text: #000;
  --muted: #666;
  --border: #ddd;
  --bg: #fff;
  --hoofdkleur: #ffffff;
  --steunkleur: #000000;
  --accentkleur: #FFED41;
  --link: #00a1ff;
}

/* general */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

main {
  color: var(--text);
  background: var(--bg);
  margin: 2rem auto;
  padding: 0 1rem 2rem;
}


/* typography */
h1,
h2,
h3,
h4,
h5,
h6,
li,
dd,
dt,
p,
a,
span {
  font-family: 'Open Sans', sans-serif;
  font-weight: 400;
  color: var(--steunkleur);
}


img {
  max-width: 100%;
  height: auto;
}

h1 {
  font-size: 3rem;
}

h2,
h3 {
  margin: 2rem 0;
  padding: 1rem 2rem;
  border: 1px solid var(--steunkleur);
  width: fit-content;
}

h2 {
  font-size: 2.5rem;
  color: var(--steunkleur);
  background-color: var(--accentkleur);
}

h3 {
  color: var(--steunkleur);
  background-color: var(--accentkleur);
  font-size: 2rem;
  font-weight: bold;
  line-height: 1.2;
}

h4 {
  font-size: 1.2rem;
  margin: 1rem 0;
  font-weight: bold;
}

p {
  line-height: 1.5;
  margin: 1rem 0;
}

a {
  color: var(--link);
}


/* list */
ol,
dl {
  padding-left: 2rem;
}

ol li {
  border-bottom: 1px solid #ccc;
  line-height: 1.7;
  padding: 1rem 2rem 0;
  ;
}

dt {
  line-height: 1.7;
  padding: 1rem 2rem 0;
  ;
  font-weight: bold;
  margin-top: 1rem;
}

dd {
  line-height: 1.7;
  padding: 1rem 2rem 0;
  ;
  margin-bottom: 1rem;
  margin-left: 2rem;
}

/* marker */
ol li::marker {
  /* padding: 2rem; */
  font-size: 1.2rem;
  font-weight: bold;
}


/* navbar */
nav {
  margin-top: 6rem;
}

nav ul {
  display: flex;
  list-style: none;
}

nav ul li {
  border-top: 1px solid var(--steunkleur);
  border-right: 1px solid var(--steunkleur);
  border-bottom: 1px solid var(--steunkleur);
  flex: auto;
}

nav ul li:first-child {
  border-left: 1px solid var(--steunkleur);
}

nav ul li a {
  display: block;
  text-decoration: none;
  padding: 1rem;
  transition: 0.25s ease-in-out;
  color: var(--steunkleur);
}

nav ul li a span {
  display: block;
  padding-bottom: 1rem;
  transition: 0.25s ease-in-out;
}

/* hover state */
nav ul li.linked a:hover {
  background-color: var(--steunkleur);
  color: var(--accentkleur);
}

nav ul li.linked a:hover span {
  color: var(--accentkleur);
}

/* active state */
nav ul li.active a,
nav ul li.active span {
  background-color: var(--steunkleur);
  color: var(--hoofdkleur);
}

nav ul li.active a:hover {
  color: var(--hoofdkleur);
}

nav ul li.active a:hover span {
  color: var(--hoofdkleur);
}


.container {
  position: relative;
  max-width: 120rem;
  margin: 0 auto;
  padding: 0 2rem;
  margin-top: 5rem;
  margin-bottom: 10rem;
}



/* buttons */
.btn {
  display: inline-block;
  margin-top: 3rem;
  background-color: var(--steunkleur);
  color: var(--accentkleur);
  font-size: 1.2rem;
  text-decoration: none;
  padding: 1rem 2rem;
  transition: 0.5s ease-in-out;
  border-bottom: 5px solid var(--hoofdkleur);
}

.btn:hover {
  background-color: var(--steunkleur);
  border-color: var(--accentkleur);
  color: var(--hoofdkleur);
}

/* Next button */
.next-btn-container {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0;
}

/* choice btn */
button {
  display: inline-block;
  background-color: var(--hoofdkleur);
  border: 1px solid var(--steunkleur);
  padding: 1rem 2rem;
  cursor: pointer;
  transition: 0.25s ease-in-out;
  color: var(--steunkleur);
}

button:hover {
  background-color: var(--steunkleur);
  color: var(--hoofdkleur);
}

/* row */
.row {
  display: flex;
  flex-wrap: wrap;
  gap: 3rem;
}

.row .col {
  flex: 1;
}

.row .col-2 {
  flex: 2;
}

/* start */
.start h1 {
  font-size: 4rem;
  padding: 1rem 2rem;
  border: 1px solid var(--steunkleur);
  width: fit-content;

}

.start h2 {
  padding: 1rem 2rem;
  margin: 0;
  background-color: var(--steunkleur);
  color: var(--hoofdkleur);
  width: fit-content;
  font-size: 3rem;
}

.start h3 {
  margin-bottom: 2rem;
  background-color: var(--hoofdkleur);
  border: none;
  padding: 0;
}

.start .info {
  display: flex;
  gap: 3rem;
}

/* Q&A */
.question-block {
  max-width: 750px;
  margin: auto;
}

.question-section {
  display: flex;
  gap: 1rem;
  align-items: center;
  margin-top: 2rem;
  margin-bottom: 1rem;
}

.question {
  font-size: 1.2rem;
}

/* Exercise */
p.exercise-info {
  margin: 3rem 0 0 0;
  border-bottom: solid 0.5px #b3b3b3;
  padding-bottom: 4rem;
  max-width: 50em;
}


.progress {
  margin-bottom: 1rem;
  color: var(--muted);
}

.choices {
  display: flex;
  gap: 0.75rem;
  margin: 1rem 0;
}

.choices button,
.choices .btn-choice {
  border: 1px solid #222;
  background: #fff;
  color: #111;
  padding: 0.6rem 0.9rem;
  cursor: pointer;
  text-decoration: none;
}

.choices button.is-selected,
.choices .btn-choice.is-selected {
  background: #111;
  color: #fff;
}


.help,
.complete {
  display: none;
  margin-top: 1rem;
  border-top: 1px solid var(--border);
  padding-top: 1rem;
}

.help {
  background-color: var(--grey);
  padding: 1rem;
  margin-left: 4rem;
}

.instructions {
  background-color: var(--grey);
  margin-top: 1rem;
  padding: 1rem;
  border-top: 1px solid var(--border);
}

.follow-up {
  display: none;
  margin-top: 1rem;
  padding: 1rem;
  border: 1px solid var(--border);
}

.card img {
  width: 100%;
  max-width: 250px;
  border: 1px solid var(--border);
  margin: 0.5rem 0;
}

.notice {
  margin-top: 0.75rem;
  color: var(--muted);
}

.page-nav {
  margin-top: 1rem;
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.page-nav a {
  color: var(--accent);
}

.icon {
  width: 3rem;
  height: 3rem;
  background-size: cover;
}

/* Icons */
#icon-id {
  background-image: url('../img/icons/id.png');
}

#icon-activate {
  background-image: url('../img/icons/activate.png');
}

#icon-loading {
  background-image: url('../img/icons/loading.png');
}

#icon-enter {
  background-image: url('../img/icons/enter.png');
}

#icon-trophy {
  background-image: url('../img/icons/trophy.png');
}

#icon-video {
  background-image: url('../img/icons/video.png');
  width: 4rem;
  height: 4rem;
}

#icon-cat {
  background-image: url('../img/icons/cat.png');
}

#icon-man {
  background-image: url('../img/icons/man.png');
}

#icon-vr {
  background-image: url('../img/icons/vr.png');
}

#icon-hand2 {
  background-image: url('../img/icons/hand-2.png');
}

#icon-hand {
  background-image: url('../img/icons/hand.png');
}

#icon-lock {
  background-image: url('../img/icons/lock.png');
}

#icon-octopus {
  background-image: url('../img/icons/octopus.png');
}


/* Media Queries */
@media screen and (max-width: 768px) {
  .container {
    margin-top: 2rem;
    margin-bottom: 5rem;
  }

  /* headings */
  .start h1,
  h1 {
    font-size: 3rem;
  }

  .start h2 {
    font-size: 2.5rem;
  }

  .start h3 {
    font-size: 2rem;
  }

  .info {
    flex-direction: column;
  }

  /* width */
  .w-50 {
    max-width: 100%;
  }

  /* nav */
  .nav {
    margin-top: 0;
  }

  nav ul {
    flex-direction: column;
  }

  nav ul li {
    border-right: none;
    border-top: none;
  }

  nav ul li:first-child {
    border-left: none;
  }

  nav ul li a {
    padding: 1rem 2rem 1rem 2rem;
  }

  nav ul li a span {
    display: inline;
    padding-bottom: 1rem;
    padding-right: 1rem;
    transition: 0.25s ease-in-out;
  }

  nav ul li.linked a {
    margin:0;
    padding:0.3rem 2rem 0.3rem 2rem;
  }

  /* list */
  .ol {
    padding-left: 2rem;
  }

  /* row */
  .row .col,
  .row .col-2 {
    flex: auto;
  }

  /* video container */
  .title-section {
    flex-direction: column;
  }

}