:root {
    --primary-color: #2E3A4D; /* diep blauwgrijs */
    --accent-color: #5A7D9A; /* ingetogen blauw */
    --background-light: #F4F6F8; /* licht neutraal grijs */
    --text-dark: #333333; /* donker neutraal grijs */
    --text-light: #FFFFFF;
    --border-color: #DEE2E6;
    --font-family: 'Open Sans', sans-serif;
    --spacing-xs: 4px;
    --spacing-s: 8px;
    --spacing-m: 16px;
    --spacing-l: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 64px;
    --section-padding: clamp(60px, 8vw, 100px);
    --border-radius: 8px;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    --shadow-heavy: 0 8px 25px rgba(0, 0, 0, 0.1);
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    line-height: 1.7;
    color: var(--text-dark);
    background-color: var(--text-light);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--primary-color);
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: var(--spacing-l);
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--spacing-xl);
}

h3 {
    font-size: clamp(1.25rem, 2.5vw, 1.75rem);
    margin-bottom: var(--spacing-m);
}

h4 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-s);
}

p {
    margin-bottom: var(--spacing-m);
}

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover, a:focus {
    color: var(--primary-color);
    text-decoration: underline;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: var(--border-radius);
}

/* Header */
.main-header {
    background-color: #fff;
    padding: var(--spacing-m) 0;
    position: sticky;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: var(--shadow);
    transition: background-color 0.3s ease;
}

.main-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--primary-color) !important;
    text-decoration: none;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav-links a {
    font-weight: 400;
    color: var(--text-dark);
    padding: var(--spacing-s) 0;
    position: relative;
    text-decoration: none;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent-color);
    transition: width 0.3s ease;
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.nav-links a.active {
    font-weight: 700;
    color: var(--primary-color);
}

/* Dropdown menu */
.dropdown {
    position: relative;
}
.dropdown .arrow-down {
    font-size: 0.7em;
    margin-left: var(--spacing-xs);
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: #fff;
    box-shadow: var(--shadow-heavy);
    border-radius: var(--border-radius);
    padding: var(--spacing-s);
    min-width: 220px;
    z-index: 1001;
    flex-direction: column;
    gap: 0;
}

.dropdown:hover .dropdown-menu {
    display: flex;
}

.dropdown-menu li {
    width: 100%;
}

.dropdown-menu a {
    display: block;
    padding: var(--spacing-s) var(--spacing-m);
    color: var(--text-dark);
    border-radius: calc(var(--border-radius) / 2);
}

.dropdown-menu a::after {
    content: none;
}

.dropdown-menu a:hover, .dropdown-menu a:focus {
    background-color: var(--background-light);
    color: var(--primary-color);
    text-decoration: none;
}

/* Mobile Menu */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    width: 30px;
    height: 22px;
    flex-direction: column;
    justify-content: space-between;
}

.mobile-menu-toggle span {
    display: block;
    width: 100%;
    height: 3px;
    background-color: var(--primary-color);
    border-radius: 3px;
    transition: all 0.3s ease;
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background-size: cover;
    background-position: center;
    color: var(--text-light);
    padding: var(--section-padding) var(--spacing-xl);
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-color: var(--primary-color);
    opacity: 0.7;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}
.hero h1 { color: var(--text-light); }
.hero p {
    font-size: clamp(1rem, 2vw, 1.25rem);
    opacity: 0.9;
}
.article-hero { min-height: 45vh; }

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--spacing-m) var(--spacing-xl);
    border-radius: var(--border-radius);
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.3s ease;
}
.btn-primary {
    background-color: var(--accent-color);
    color: var(--text-light);
}
.btn-primary:hover {
    background-color: var(--primary-color);
    color: var(--text-light);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}
.btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}
.btn-secondary:hover {
    background-color: var(--primary-color);
    color: var(--text-light);
}

/* Content Sections */
.content-section {
    padding: var(--section-padding) 0;
}
.bg-light { background-color: var(--background-light); }
.section-container {
    animation: fadeIn 1s ease-out;
}
.section-title {
    text-align: center;
    margin-bottom: var(--spacing-xxl);
}
.section-intro {
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
    font-size: 1.1rem;
    color: #555;
    margin-bottom: var(--spacing-xxl);
}

.article-links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}
.article-link-card {
    background: #fff;
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}
.article-link-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-heavy);
}
.article-link-card h3 { color: var(--accent-color); }
.text-link {
    font-weight: 700;
    display: inline-block;
    margin-top: var(--spacing-m);
}

/* Two Column Layout */
.two-column-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
    align-items: center;
}
.two-column-layout.reverse {
    grid-template-columns: 1fr 1fr;
}
.two-column-layout.reverse .column-text { grid-column: 2; grid-row: 1; }
.two-column-layout.reverse .column-image { grid-column: 1; grid-row: 1; }
.column-text h2 { text-align: left; }

/* Principles Section */
.principles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}
.principle-card {
    text-align: center;
    padding: var(--spacing-l);
}
.principle-icon {
    font-size: 3rem;
    color: var(--accent-color);
    margin-bottom: var(--spacing-m);
}
.text-center-max-width {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}
.text-center-max-width .section-title,
.text-center-max-width .section-intro {
    text-align: center;
}

/* Article Page */
.article-container {
    max-width: 850px;
}
.article-container h2 {
    margin-top: var(--spacing-xxl);
    margin-bottom: var(--spacing-l);
}
.article-container p, .article-container ul {
    margin-bottom: var(--spacing-l);
}
.article-container ul {
    list-style: disc;
    padding-left: var(--spacing-l);
}
.breadcrumbs {
    font-size: 0.9rem;
    color: #777;
    margin-bottom: var(--spacing-xl);
}
.breadcrumbs a { color: #777; }
.editorial-call {
    margin: var(--spacing-xxl) 0;
    padding: var(--spacing-l);
    border-left: 4px solid var(--accent-color);
    background-color: var(--background-light);
    font-style: italic;
}
.related-articles h3 {
    margin-bottom: var(--spacing-m);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: var(--spacing-s);
}
.related-articles ul li { list-style: none; margin-bottom: var(--spacing-s); }
.related-articles ul { padding-left: 0; }

/* Contact Page */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1.25fr;
    gap: var(--spacing-xxl);
}
.contact-info h3 { margin-top: var(--spacing-xl); }
.contact-info address { font-style: normal; line-height: 1.6; }
.disclaimer {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-m);
    background-color: var(--background-light);
    border-radius: var(--border-radius);
    font-size: 0.9rem;
}
.contact-form-wrapper {
    background: #fff;
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-heavy);
}
.form-group {
    margin-bottom: var(--spacing-l);
}
.form-group label {
    display: block;
    margin-bottom: var(--spacing-s);
    font-weight: 700;
}
.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-m);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    font-family: var(--font-family);
    font-size: _rem;
    transition: border-color 0.3s, box-shadow 0.3s;
}
.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(90, 125, 154, 0.2);
}

.map-container {
  width: 100%;
  height: 450px;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow);
  margin-top: var(--spacing-xl);
}
.map-container iframe {
  width: 100%;
  height: 100%;
  border: none;
}

/* Thank You Page */
.thank-you-section {
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 20px;
}
.thank-you-icon {
  width: 80px;
  height: 80px;
  background: var(--accent-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 30px;
}
.thank-you-icon svg {
  width: 40px;
  height: 40px;
  color: white;
  stroke: white;
}
.thank-you-section h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  margin-bottom: 20px;
  color: var(--primary-color);
}
.thank-you-section p {
  font-size: 1.2rem;
  color: var(--text-dark);
  max-width: 600px;
  margin-bottom: 30px;
}

/* Footer */
.main-footer {
    background-color: var(--primary-color);
    color: rgba(255, 255, 255, 0.8);
    padding: var(--spacing-xxl) 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
}
.footer-col h4 {
    color: var(--text-light);
    margin-bottom: var(--spacing-m);
}
.footer-col ul li {
    margin-bottom: var(--spacing-s);
}
.footer-col a {
    color: rgba(255, 255, 255, 0.8);
}
.footer-col a:hover {
    color: var(--text-light);
    text-decoration: underline;
}
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding: var(--spacing-l) 0;
    text-align: center;
    font-size: 0.9rem;
}

/* Cookie Banner */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: rgba(46, 58, 77, 0.95);
    color: white;
    padding: var(--spacing-l);
    display: none; /* Initially hidden */
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-l);
    z-index: 9999;
    backdrop-filter: blur(5px);
}
.cookie-banner p {
    margin: 0;
}
.cookie-banner a {
    color: #fff;
    text-decoration: underline;
}
.cookie-buttons {
    display: flex;
    gap: var(--spacing-m);
    flex-shrink: 0;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeIn 1s ease-out forwards;
}

/* Responsive */
@media (max-width: 1024px) {
    .two-column-layout, .two-column-layout.reverse {
        grid-template-columns: 1fr;
    }
    .two-column-layout.reverse .column-text,
    .two-column-layout.reverse .column-image { grid-column: 1; grid-row: auto; }
    .column-image { margin-top: var(--spacing-xl); }
}

@media (max-width: 768px) {
    .main-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: #fff;
        box-shadow: var(--shadow-heavy);
        flex-direction: column;
        align-items: stretch;
        padding: var(--spacing-m);
    }
    .main-nav.active { display: flex; }
    .nav-links {
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
        width: 100%;
    }
    .nav-links li { width: 100%; }
    .nav-links a {
        display: block;
        padding: var(--spacing-m);
        width: 100%;
    }
    .nav-links a::after { content: none; }

    .dropdown-menu {
        position: static;
        display: flex;
        box-shadow: none;
        padding-left: var(--spacing-l);
    }

    .mobile-menu-toggle { display: flex; }

    .main-header.menu-open {
        background-color: var(--background-light);
    }
    .main-header.menu-open .mobile-menu-toggle span:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    .main-header.menu-open .mobile-menu-toggle span:nth-child(2) {
        opacity: 0;
    }
    .main-header.menu-open .mobile-menu-toggle span:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .contact-container {
        grid-template-columns: 1fr;
    }
    .map-container { height: 350px; }
    
    .cookie-banner {
        flex-direction: column;
        text-align: center;
    }
}