/* =========================================
 *  1. VARIABLES & RESET
 *  ========================================= */
:root {
    /* Colors */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --text-nav: #e2e8f0;
    --accent: #60a5fa;
    --accent-hover: #3b82f6;
    --border: #334155;

    /* Spacing & Layout */
    --radius: 8px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --header-height: 6.6rem;
    --header-height-mobile: 4.25rem;
    --container-max: 886px;
    --container-wide-max: 1024px;
    --sticky-offset: calc(var(--header-height) + 3rem);
    --sticky-offset-mobile: calc(var(--header-height-mobile) + 2rem)

    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    --fs-h1: clamp(2rem, 5vw, 2.5rem);
    --fs-h2: clamp(1.5rem, 4vw, 2rem);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-padding-top: var(--sticky-offset);
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    min-height: 100vh;
    margin: 0;
    letter-spacing: 0.05em;
    word-spacing: 0.01em;
}

/* =========================================
 *  2. UTILITIES & LAYOUT
 *  ========================================= */
.container { max-width: var(--container-max); margin: 0 auto; padding: 0 1.5rem; }
.container-wide { max-width: var(--container-wide-max); margin: 0 auto; }

.skip-link {
    position: absolute;
    left: -9999px;
    z-index: 9999;
}
.skip-link:focus {
    left: 0; top: 0;
    background: var(--accent);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
}

/* =========================================
 *  3. TYPOGRAPHY & LINKS
 *  ========================================= */
a {
    color: var(--accent);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 2px;
    transition: color 0.2s ease, text-decoration-color 0.2s ease;
}
a:hover {
    color: var(--accent-hover);
    text-decoration-thickness: 2px;
    text-decoration-color: var(--accent-hover);
}
a:focus {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: 2px;
    color: var(--accent-hover);
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 1rem;
    color: var(--text-primary);
}
h1 { font-size: var(--fs-h1); letter-spacing: 0.02em; }
h2 { font-size: var(--fs-h2); letter-spacing: 0.01em; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p { margin-bottom: 1rem; color: var(--text-secondary); }

code {
    font-family: var(--font-mono);
    font-size: 0.9em;
    background: var(--bg-tertiary);
    padding: 0.2em 0.4em;
    border-radius: 4px;
}

pre {
    background: var(--bg-secondary);
    padding: 1rem;
    border-radius: var(--radius);
    overflow-x: auto;
    margin-bottom: 1rem;
    border: 1px solid var(--border);
}
pre code { background: transparent; padding: 0; }

/* =========================================
 *  4. COMPONENTS
 *  ========================================= */
/* Header & Nav */
header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    min-height: var(--header-height);
    transition: min-height 0.3s ease;
    will-change: min-height;
}
.header-center {
    display: flex;
    justify-content: center;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 1.5rem;
    max-width: var(--container-wide-max);
    margin: 0 auto;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: inherit;
    font-weight: bold;
    font-size: 1.25rem;
}
.nav-brand img { max-width: 40px; height: auto; display: block; }

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
    align-items: center;
}

.nav-links a {
    color: var(--text-nav);
    font-size: 0.9375rem;
    text-decoration: none;
    border-bottom: 2px solid transparent;
    transition: color 0.2s ease, border-color 0.2s ease;
}
.nav-links a:hover,
.nav-links a.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}
.nav-links a.active { font-weight: 600; }

/* Breadcrumb */
.breadcrumb {
    position: sticky;
    top: calc(var(--header-height));
    z-index: 90;
    background-color: var(--bg-primary);
    padding: 0.5rem 0;
    margin-bottom: 2rem;
    font-size: 0.875rem;
    color: var(--text-muted);
    transition: top 0.3s ease;
}
.breadcrumb a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s ease;
}
.breadcrumb a:hover { color: var(--accent); text-decoration: underline; }
.breadcrumb span[aria-current="page"] {
    color: var(--text-primary);
    font-weight: 500;
}
.breadcrumb-separator { margin: 0 0.5rem; color: var(--border); }

/* Cards & Content */
.card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin: 1.2rem 0;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    will-change: transform;
}
.card:hover { transform: translateY(-2px); box-shadow: var(--shadow); }

.card-title { font-size: 1.25rem; color: var(--text-secondary); margin-bottom: 0.5rem; }
.card-title a { color: var(--text-secondary); text-decoration: none; }
.card-title a:hover { color: var(--accent); }

.card-meta { font-size: 0.875rem; color: var(--text-muted); margin-bottom: 1rem; }

.markdown-content { line-height: 1.7; }
.markdown-content h1, .markdown-content h2, .markdown-content h3 { margin-top: 2rem; margin-bottom: 1rem; }
.markdown-content p { margin-bottom: 1.25rem; }
.markdown-content ul, .markdown-content ol { margin-bottom: 1rem; padding-left: 1.5rem; color: var(--text-secondary); }
.markdown-content li { margin-bottom: 0.5rem; }
.markdown-content blockquote {
    border-left: 3px solid var(--accent);
    padding-left: 1rem;
    margin: 1rem 0;
    color: var(--text-muted);
    font-style: italic;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.625rem 1.25rem;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius);
    font-weight: 500;
    transition: background 0.2s ease, border-color 0.2s ease;
    cursor: pointer;
    border: 1px solid transparent;
}
.btn:hover { color: var(--accent); border-color: var(--accent); }

.btn-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-primary);
}
.btn-outline:hover { color: var(--accent); border-color: var(--accent); }

/* Project Specifics */
.project-meta {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}
.project-meta strong { color: var(--text-secondary); }

.project-featured-image {
    width: 100%;
    height: auto;
    border-radius: var(--radius);
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
    display: block;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 1.5rem 0 2rem;
}

.tag-badge {
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 500;
    border: 1px solid var(--border);
    transition: background-color 0.2s ease, color 0.2s ease;
}
.tag-badge:hover {
    background-color: var(--accent);
    color: white;
    border-color: var(--accent);
}

.action-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin: 2rem 0;
}

/* Pagination */
.page-navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    gap: 1rem;
}

.page-nav-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    background-color: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    border-radius: var(--radius);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s ease;
}
.page-nav-btn:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--accent);
    transform: translateY(-1px);
}
.page-nav-btn.disabled {
    opacity: 0.5;
    pointer-events: none;
    cursor: not-allowed;
}

.project-pages-section h2 { margin-bottom: 1rem; font-size: 1.5rem; }
.project-pages-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1rem;
}
.project-pages-list li {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.project-pages-list li:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
    border-color: var(--accent);
}
.project-pages-list a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    display: block;
}
.project-pages-list a:hover { color: var(--accent); }

/* Tables */
.markdown-content table {
    width: auto;
    min-width: 300px; /* Pas deze waarde aan naar behoefte */
    margin: 1rem 0;
    border-collapse: collapse;
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}
.markdown-content th,
.markdown-content td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}
.markdown-content th {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    border-bottom: 2px solid var(--border);
}
.markdown-content tr:last-child td { border-bottom: none; }
.markdown-content tr:hover { background-color: rgba(96, 165, 250, 0.05); }

/* Footer */
footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem 0;
    margin-top: 1rem;
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 1.5rem;
}

.copyright {
    color: var(--text-secondary);
    font-size: 0.875rem;
    text-align: right;
    line-height: 1.5;
}
.copyright p { margin-bottom: 0; }
.copyright p:last-child { margin-top: 0.25rem; }

.license { font-size: 0.8rem; margin-top: 0.25rem; }
.license svg { width: 16px; height: 16px; fill: currentColor; vertical-align: middle; margin-right: 0.25rem; }

.copyright .license a {
    color: var(--text-primary);
    font-weight: 500;
    text-decoration: none;
}
.copyright .license a:hover { color: var(--accent); text-decoration-color: var(--accent); }

.contact-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.contact-item a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.875rem;
    transition: color 0.2s ease, transform 0.2s ease;
    display: inline-flex;
    align-items: center;
}
.contact-item a:hover {
    color: var(--accent);
    transform: translateY(-1px);
}

.contact-item svg {
    width: 16px;
    height: 16px;
    fill: currentColor;
    vertical-align: middle;
    margin-right: 0.25rem;
    display: inline-block;
    transition: fill 0.2s ease;
}

.separator {
    position: relative;
    padding-left: 1rem;
    margin-left: 0.25rem;
}
.separator::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 1.2em;
    background-color: var(--border);
}

/* =========================================
 *  5. RESPONSIVE DESIGN
 *  ========================================= */
@media (max-width: 768px) {
    header {
        padding: 0.75rem 0;
        min-height: var(--header-height-mobile);
        border-radius: 0;
    }
    .nav { padding: 0 1rem; }
    .nav-brand { font-size: 1.1rem; }
    .nav-links { gap: 1rem; font-size: 0.85rem; }

    .breadcrumb {
        top: calc(var(--header-height-mobile) + 0rem);
        padding: 0.25rem 0;
        font-size: 0.8rem;
        white-space: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    @media (max-width: 360px) {
        .breadcrumb-separator { display: none; }
        .breadcrumb { white-space: normal; }
    }

    .container { padding: 0 1rem; }
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }

    .action-buttons {
        flex-direction: column;
        gap: 0.75rem;
    }
    .page-navigation {
        flex-direction: column-reverse;
        align-items: stretch;
    }
    .page-nav-btn {
        width: 100%;
        justify-content: center;
    }

    .project-pages-list {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    .contact-info {
        flex-direction: column;
        gap: 0.75rem;
    }
    .separator { display: none; }
    .contact-item {
        flex-direction: row;
        justify-content: center;
    }
    .copyright { text-align: center; }

    /* Tabel responsive */
    .markdown-content table {
        display: block;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        white-space: nowrap;
    }
    .markdown-content table::-webkit-scrollbar { height: 6px; }
    .markdown-content table::-webkit-scrollbar-track { background: var(--bg-primary); }
    .markdown-content table::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
}