/* --- CSS Reset & Base --- */
:root {
    --primary-color: #0d2c4e; /* Diep institutioneel blauw */
    --secondary-color: #4a6482; /* Gedempt leiblauw */
    --accent-color: #a0b4c8; /* Zacht neutraal blauw */
    --bg-color: #f4f5f7; /* Licht neutraal grijs */
    --text-color: #333942; /* Donker neutraal grijs */
    --text-light: #f8f9fa;
    --text-muted: #6c757d;
    --border-color: #dee2e6;

    --font-family-base: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --spacing-xs: 0.25rem;
    --spacing-s: 0.5rem;
    --spacing-m: 1rem;
    --spacing-l: 1.5rem;
    --spacing-xl: 2.5rem;
    --spacing-xxl: 4rem;
    --border-radius: 4px;
    --max-width: 800px;
    --header-height: 70px;
}

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

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

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

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-m);
    color: var(--primary-color);
}

h1 { font-size: clamp(1.75rem, 5vw, 2.5rem); }
h2 { font-size: clamp(1.5rem, 4vw, 2rem); }
h3 { font-size: clamp(1.2rem, 3vw, 1.5rem); }

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

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

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

ul {
    list-style: none;
}

img, svg {
    max-width: 100%;
    height: auto;
    display: block;
}

.content-wrapper {
    width: 100%;
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.container {
    width: 90%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-xxl) 0;
}

.institutional-image {
    filter: grayscale(1) sepia(0.2) brightness(0.9);
    border-radius: var(--border-radius);
    aspect-ratio: 16 / 9;
    object-fit: cover;
    margin-bottom: var(--spacing-l);
}

/* --- Header & Navigation --- */
.site-header {
    background-color: #fff;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    height: var(--header-height);
    display: flex;
    align-items: center;
}

.header-container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

.logo:hover {
    color: var(--secondary-color);
    text-decoration: none;
}

.nav-links {
    display: none;
    gap: var(--spacing-l);
}

.nav-links li a {
    color: var(--text-color);
    font-weight: 500;
    font-size: 0.95rem;
    padding: var(--spacing-s) 0;
    position: relative;
}

.nav-links li a:hover,
.nav-links li a.active {
    color: var(--primary-color);
    text-decoration: none;
}

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

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

.burger-menu {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    width: 1.5rem;
    height: 1.5rem;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 10;
}

.burger-menu span {
    width: 1.5rem;
    height: 2px;
    background-color: var(--primary-color);
    border-radius: 10px;
    transition: all 0.3s linear;
    position: relative;
    transform-origin: 1px;
}

.mobile-nav {
    display: none;
    flex-direction: column;
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    height: calc(100vh - var(--header-height));
    background-color: #fff;
    padding: var(--spacing-xl);
    text-align: center;
}

.mobile-nav.open {
    display: flex;
}

.mobile-nav li {
    margin-bottom: var(--spacing-l);
}

.mobile-nav li a {
    font-size: 1.5rem;
    color: var(--primary-color);
}


/* --- Hero Section --- */
.hero {
    background-color: var(--primary-color);
    color: var(--text-light);
    height: 50vh;
    min-height: 350px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    padding: 0 2rem;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('https://images.pexels.com/photos/14075384/pexels-photo-14075384.jpeg?auto=compress&cs=tinysrgb&dpr=2&h=650&w=940');
    background-size: cover;
    background-position: center;
    filter: grayscale(1) sepia(0.2) brightness(0.6);
    opacity: 0.15;
}

.hero-content {
    position: relative;
    max-width: 700px;
}

.hero h1 {
    color: var(--text-light);
    margin-bottom: var(--spacing-s);
    font-weight: 500;
}

.hero p {
    font-size: 1.1rem;
    color: var(--accent-color);
    opacity: 0.9;
}

/* --- Breadcrumbs --- */
.breadcrumbs {
    padding: var(--spacing-m) 0;
    font-size: 0.9rem;
}

.breadcrumbs a {
    color: var(--text-muted);
}

.breadcrumbs span {
    color: var(--text-color);
}

/* --- Article & Page Content --- */
.article-header {
    margin-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: var(--spacing-l);
}

.article-header h1 {
    font-size: clamp(2rem, 6vw, 2.75rem);
    line-height: 1.2;
}

.article-header .meta {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.article-content ul {
    list-style-type: disc;
    padding-left: 1.5rem;
    margin-bottom: var(--spacing-m);
}
.article-content ul li {
    margin-bottom: var(--spacing-s);
}

.article-content blockquote {
    border-left: 3px solid var(--accent-color);
    padding-left: var(--spacing-l);
    margin: var(--spacing-l) 0;
    font-style: italic;
    color: var(--secondary-color);
}

/* --- Minimalist Components (Home) --- */
.analysis-section {
    padding: var(--spacing-l) 0;
    border-bottom: 1px solid var(--border-color);
}

.analysis-section:last-child {
    border-bottom: none;
}

.analysis-section h3 {
    display: flex;
    align-items: center;
    gap: var(--spacing-m);
    color: var(--secondary-color);
    font-weight: 500;
}

.analysis-section .icon-placeholder {
    display: inline-block;
    width: 24px;
    height: 24px;
    background-color: var(--accent-color);
    border-radius: 50%;
    flex-shrink: 0;
}

.related-articles {
    margin-top: var(--spacing-xl);
}

.related-articles h3 {
    margin-bottom: var(--spacing-m);
}

.related-articles ul a {
    display: block;
    padding: var(--spacing-s) 0;
    font-weight: 500;
    text-decoration: underline;
    text-decoration-color: var(--accent-color);
}

/* --- Testimonial Quote --- */
.testimonial-quote {
    text-align: center;
    padding: var(--spacing-xxl) 0;
    background-color: #fff;
}

.testimonial-quote blockquote {
    max-width: 650px;
    margin: 0 auto;
    font-size: 1.2rem;
    font-style: italic;
    color: var(--secondary-color);
    border: none;
    padding: 0;
}

.testimonial-quote footer {
    margin-top: var(--spacing-m);
    font-style: normal;
    font-weight: 600;
}

/* --- Diagram (sectoren-sleutel.html) --- */
.structural-diagram {
    border: 1px solid var(--border-color);
    padding: var(--spacing-l);
    border-radius: var(--border-radius);
    text-align: center;
    background-color: #fff;
    margin: var(--spacing-xl) 0;
}

.diagram-level {
    margin-bottom: var(--spacing-l);
    position: relative;
}

.diagram-level:not(:last-child)::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: -1.25rem;
    transform: translateX(-50%);
    width: 2px;
    height: 1rem;
    background-color: var(--accent-color);
}

.diagram-level h4 {
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.9rem;
    margin-bottom: var(--spacing-s);
}

.diagram-box-container {
    display: flex;
    justify-content: center;
    gap: var(--spacing-m);
    flex-wrap: wrap;
}

.diagram-box {
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    padding: var(--spacing-m);
    border-radius: var(--border-radius);
    color: var(--primary-color);
    font-weight: 500;
    flex-grow: 1;
    max-width: 200px;
}

.diagram-box.main {
    background-color: var(--accent-color);
    color: var(--primary-color);
    border-color: var(--secondary-color);
}

/* --- Contact Page --- */
.contact-grid {
    display: grid;
    gap: var(--spacing-xl);
}

.contact-info-block {
    margin-bottom: var(--spacing-l);
}
.contact-info-block h3 {
    margin-bottom: var(--spacing-s);
}
.contact-info-block p, .contact-info-block a {
    color: var(--text-muted);
    margin-bottom: var(--spacing-xs);
    display: block;
}

.contact-form-container .disclaimer {
    font-size: 0.9em;
    color: var(--text-muted);
    margin-bottom: var(--spacing-l);
    padding: var(--spacing-m);
    background-color: var(--bg-color);
    border-left: 3px solid var(--accent-color);
}

.form-group {
    margin-bottom: var(--spacing-l);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-s);
    font-weight: 500;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: var(--spacing-m);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-family: var(--font-family-base);
    font-size: 1rem;
    background-color: #fff;
}

.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(13, 44, 78, 0.2);
}

.submit-btn {
    background-color: var(--primary-color);
    color: #fff;
    border: none;
    padding: var(--spacing-m) var(--spacing-l);
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: background-color 0.3s ease;
}

.submit-btn:hover {
    background-color: var(--secondary-color);
}

.map-container {
    width: 100%;
    height: 400px;
    border-radius: var(--border-radius);
    overflow: hidden;
    margin-top: var(--spacing-xl);
    border: 1px solid var(--border-color);
}

/* --- Thank You Page --- */
.thank-you-section {
    min-height: 50vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-xxl) var(--spacing-m);
}
  
.thank-you-icon {
    width: 70px;
    height: 70px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-l);
}
  
.thank-you-icon svg {
    width: 35px;
    height: 35px;
    color: white;
}
  
.thank-you-section p {
    color: var(--text-muted);
    max-width: 500px;
    margin-bottom: var(--spacing-l);
}

.home-link {
    display: inline-block;
    color: var(--secondary-color);
    text-decoration: underline;
    font-weight: 500;
}
.home-link:hover {
    color: var(--primary-color);
}

/* --- Footer --- */
.site-footer {
    background-color: var(--secondary-color);
    color: var(--accent-color);
    padding-top: var(--spacing-xl);
}

.footer-container {
    width: 90%;
    max-width: var(--max-width);
    margin: 0 auto;
    text-align: center;
}

.footer-contact p, .footer-contact a {
    color: var(--accent-color);
    font-size: 0.9rem;
    margin: 0;
}

.footer-contact .address {
    margin-bottom: var(--spacing-s);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-m);
    margin: var(--spacing-l) 0;
}

.footer-links a {
    color: var(--text-light);
    font-size: 0.9rem;
}

.footer-links a:hover {
    text-decoration: underline;
    color: #fff;
}

.disclaimer-section {
    background-color: rgba(0,0,0,0.1);
    color: var(--accent-color);
    padding: var(--spacing-l);
    margin: var(--spacing-xl) 0 0 0;
    border-radius: var(--border-radius);
    text-align: left;
    font-size: 0.8rem;
    line-height: 1.6;
}
.disclaimer-section strong {
    display: block;
    margin-bottom: var(--spacing-s);
    color: var(--text-light);
}

.copyright {
    padding: var(--spacing-l) 0;
    margin-top: var(--spacing-l);
    font-size: 0.8rem;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* --- Cookie Banner --- */
#cookie-banner {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: rgba(13, 44, 78, 0.95);
    backdrop-filter: blur(5px);
    color: var(--text-light);
    padding: var(--spacing-l);
    z-index: 9999;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-l);
    font-size: 0.9rem;
}

#cookie-banner p {
    margin: 0;
    flex-basis: 100%;
    text-align: center;
}

.cookie-buttons {
    display: flex;
    gap: var(--spacing-m);
}

.cookie-btn {
    border: none;
    border-radius: var(--border-radius);
    padding: var(--spacing-s) var(--spacing-m);
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s ease;
}

#cookie-accept-btn {
    background-color: var(--accent-color);
    color: var(--primary-color);
}

#cookie-accept-btn:hover {
    background-color: #fff;
}

#cookie-decline-btn {
    background-color: transparent;
    border: 1px solid var(--secondary-color);
    color: var(--accent-color);
}
#cookie-decline-btn:hover {
    background-color: var(--secondary-color);
    color: #fff;
}

/* --- Responsive --- */
@media (min-width: 768px) {
    .container {
        padding: var(--spacing-xxl) 0;
    }
    .burger-menu {
        display: none;
    }
    .nav-links {
        display: flex;
    }

    #cookie-banner p {
        flex-basis: auto;
        text-align: left;
    }

    .contact-grid {
        grid-template-columns: 1fr 1.5fr;
    }
}

@media (min-width: 1024px) {
    .header-container {
        width: 85%;
    }
    .hero {
        height: 60vh;
        min-height: 450px;
    }
}