* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    width: 100%;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;

    color: rgb(10, 18, 51);
    font-family: "Roboto", sans-serif;
    font-size: 1em;
}


/* =========================
   HEADER
   ========================= */

header {
    width: 100%;
    margin: 0;
    padding: 0;
    background-color: rgb(13, 65, 118);
    text-align: center;
}

header img {
    display: block;
    width: 100%;
    max-width: 900px;
    height: auto;
    margin: 0 auto;
}


/* =========================
   NAVIGATIE
   ========================= */

nav {
    width: 100%;
    margin: 0;
    padding: 0;
    background-color: rgb(24, 61, 98);
    font-size: 1em;
}

nav ul {
    width: 100%;
    max-width: 900px;
    height: 50px;

    margin: 0 auto;
    padding: 0;

    list-style-type: none;

    display: flex;
    align-items: center;
}


/* =========================
   HOOFDMENU
   ========================= */

.main-nav-item {
    width: 180px;
    min-width: 180px;
    height: 50px;

    padding: 0;

    text-align: center;
}

.main-nav-item a {
    display: flex;
    align-items: center;
    justify-content: center;

    width: 100%;
    height: 100%;

    text-decoration: none;
    color: rgb(143, 196, 219);
}

.main-nav-item:hover {
    background-color: #061565;
}

.main-nav-item a.active {
    color: white;
}


/* =========================
   TAALKEUZE
   ========================= */

.language-selector {
    margin-left: auto;

    height: 50px;

    display: flex;
    align-items: center;
    justify-content: flex-end;

    padding: 0;
}

.language-selector .language-button {
    background: none;
    border: none;

    width: 38px;
    height: 38px;

    padding: 4px;
    margin: 0 2px;

    font-size: 22px;
    line-height: 30px;

    cursor: pointer;

    color: white;

    opacity: 0.6;

    border-radius: 5px;

    transition:
        transform 0.15s ease,
        opacity 0.15s ease,
        background-color 0.15s ease;
}


/* Hover vlag */

.language-selector .language-button:hover {
    opacity: 1;
    transform: scale(1.15);
    background-color: rgba(255, 255, 255, 0.15);
}


/* Actieve taal */

.language-selector .language-button.active-language {
    opacity: 1;
    transform: scale(1.15);
    background-color: rgba(255, 255, 255, 0.25);
}


/* =========================
   ARTICLE
   ========================= */

article {
    width: 100%;
    max-width: 900px;

    margin: 0 auto;
    padding: 2em;

    flex: 1;
}

article img {
    max-width: 100%;
}

article ul,
#hoofdvak ol {
    list-style-position: outside;
    margin-left: 2em;
}

article h1 {
    color: rgb(92, 118, 178);
}

article h2 {
    color: rgb(191, 205, 219);
}


/* =========================
   FOOTER
   ========================= */

footer {
    width: 100%;

    background-color: rgb(55, 110, 164);

    clear: both;

    color: white;

    font-size: .8em;

    padding: 4px 0;

    text-align: center;
}

footer p {
    margin: 4px 0;
}


/* =========================
   RESPONSIVE IFRAME
   ========================= */

.container {
    position: relative;
    overflow: hidden;
    width: 100%;
    padding-top: 56.25%;
}

.responsive-iframe {
    position: absolute;

    top: 0;
    left: 0;
    bottom: 0;
    right: 0;

    width: 100%;
    height: 100%;
}

.download-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;

    background: linear-gradient(135deg, #2e387d, #40529a);
    color: #ffffff;

    padding: 14px 24px;
    margin: 15px 0 20px 0;

    border-radius: 8px;
    border: none;

    text-decoration: none;
    font-size: 16px;
    font-weight: bold;

    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.20);

    transition:
        background-color 0.2s ease,
        transform 0.2s ease,
        box-shadow 0.2s ease;

    -webkit-tap-highlight-color: transparent;
}

/* Download-icoon */
.download-icon {
    position: relative;
    display: inline-block;
    width: 18px;
    height: 20px;
}

/* Verticale lijn */
.download-icon::before {
    content: "";
    position: absolute;
    left: 8px;
    top: 1px;
    width: 2px;
    height: 12px;
    background: white;
    border-radius: 2px;
}

/* Pijlpunt */
.download-icon::after {
    content: "";
    position: absolute;
    left: 4px;
    top: 8px;
    width: 8px;
    height: 8px;

    border-right: 2px solid white;
    border-bottom: 2px solid white;

    transform: rotate(45deg);
}

/* Onderste streep */
.download-button span.download-icon {
    border-bottom: 2px solid white;
    box-sizing: border-box;
}

.download-button:hover {
    background: linear-gradient(135deg, #40529a, #5571a1);
    transform: translateY(-1px);
    box-shadow: 0 5px 12px rgba(0, 0, 0, 0.25);
}

.download-button:active {
    transform: translateY(1px);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.20);
}
/* =========================
   MOBIEL
   ========================= */

@media screen and (max-width: 599px) {

    nav ul {
        height: auto;
        flex-wrap: wrap;
    }

    .main-nav-item {
        width: 180px;
        min-width: 180px;
    }

    .language-selector {
        width: 100%;
        margin-left: 0;
        justify-content: center;
    }

    article {
        padding: 1em;
    }
}