/* ============================================
   Informatica Portal — Dark Game Theme
   ============================================ */

/* --- Webfont: Inter (zelf gehost, geen extern CDN i.v.m. AVG) ---
   Variabele font: één bestand dekt alle gewichten 100-900. */
@font-face {
    font-family: 'Inter';
    src: url('../fonts/InterVariable.woff2') format('woff2');
    font-weight: 100 900;
    font-style: normal;
    font-display: swap;
}
@font-face {
    font-family: 'Inter';
    src: url('../fonts/InterVariable-Italic.woff2') format('woff2');
    font-weight: 100 900;
    font-style: italic;
    font-display: swap;
}

/* --- Design Tokens --- */
:root {
    /* Backgrounds */
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --bg-card: #1c2128;
    --bg-elevated: #2d333b;

    /* Text */
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --text-muted: #868f99;  /* AA-contrast op alle donkere bg's (was #484f58, faalde WCAG) */

    /* Accents */
    --accent-blue: #58a6ff;
    --accent-green: #3fb950;
    --accent-yellow: #d29922;
    --accent-red: #f85149;
    --accent-purple: #bc8cff;
    --accent-cyan: #39d2c0;
    --accent-orange: #f0883e;

    /* Domain colors (skill tree) — SLO examendomeinen */
    --domain-a: #58a6ff;   /* Vaardigheden — blauw */
    --domain-b: #3fb950;   /* Grondslagen — groen */
    --domain-c: #f0883e;   /* Informatie — oranje */
    --domain-d: #bc8cff;   /* Programmeren — paars */
    --domain-e: #f85149;   /* Architectuur — rood */
    --domain-f: #39d2c0;   /* Interactie — cyaan */

    /* Effects */
    --glow-blue: 0 0 12px rgba(88, 166, 255, 0.25);
    --glow-green: 0 0 12px rgba(63, 185, 80, 0.25);
    --glow-purple: 0 0 12px rgba(188, 140, 255, 0.25);
    --shadow-card: 0 4px 16px rgba(0, 0, 0, 0.3);
    --shadow-elevated: 0 8px 24px rgba(0, 0, 0, 0.4);

    /* Surfaces & overlays (thema-afhankelijk) */
    --header-bg: rgba(13, 17, 23, 0.85);
    --track-bg: rgba(255, 255, 255, 0.08);
    --node-locked-bg: rgba(30, 38, 50, 0.6);

    /* Borders */
    --border-color: #30363d;
    --border-subtle: #21262d;

    /* Gray scale */
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;

    /* Status colors */
    --status-success: #4ade80;
    --status-error: #f87171;
    --status-warning: #fbbf24;
    --status-info: #60a5fa;

    /* Button gradients */
    --btn-primary-start: #1f6feb;
    --btn-primary-end: #388bfd;
    --btn-success-start: #238636;
    --btn-success-end: #2ea043;
    --btn-danger-start: #da3633;
    --btn-danger-end: #f85149;

    /* Links */
    --link-hover: #79c0ff;
    --link-active: #93c5fd;

    /* Skill tree nodes */
    --node-completed: #fbbf24;
    --node-available: #60a5fa;
    --node-gate: #06b6d4;
    --node-active: #8b5cf6;

    /* Code & special */
    --bg-code: #1e293b;
    --code-text: #a5b4fc;
    --formula-text: #a78bfa;

    /* Layout */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --max-width: 1200px;

    /* Typography */
    --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    /* Serif alleen voor de verhaallaag (briefings/notities van De Duinen):
       echte boekletters i.p.v. de kale `serif`-fallback (= Times op Windows). */
    --font-serif: 'Charter', 'Bitstream Charter', 'Iowan Old Style', 'Palatino Linotype', Georgia, serif;

    /* Type scale (rem) — vervangt de 25 losse font-sizes geleidelijk */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.375rem;
    --text-2xl: 1.75rem;

    /* Spacing scale (4px-grid) — vervangt de ad-hoc padding/gap-waarden geleidelijk */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
}


/* --- Light theme overrides --- */
html[data-theme="light"] {
    /* Backgrounds */
    --bg-primary: #ffffff;
    --bg-secondary: #f6f8fa;
    --bg-tertiary: #eaeef2;
    --bg-card: #ffffff;
    --bg-elevated: #f0f3f6;

    /* Text */
    --text-primary: #1f2328;
    --text-secondary: #59636e;
    --text-muted: #6b7280;  /* AA-contrast op witte achtergrond (was #818b98, faalde WCAG) */

    /* Accents — donkerder voor contrast op wit */
    --accent-blue: #0969da;
    --accent-green: #1a7f37;
    --accent-yellow: #9a6700;
    --accent-red: #cf222e;
    --accent-purple: #8250df;
    --accent-cyan: #1b7c83;
    --accent-orange: #bc4c00;

    /* Domain colors (skill tree) */
    --domain-a: #0969da;
    --domain-b: #1a7f37;
    --domain-c: #bc4c00;
    --domain-d: #8250df;
    --domain-e: #cf222e;
    --domain-f: #1b7c83;

    /* Effects */
    --glow-blue: 0 0 10px rgba(9, 105, 218, 0.18);
    --glow-green: 0 0 10px rgba(26, 127, 55, 0.18);
    --glow-purple: 0 0 10px rgba(130, 80, 223, 0.18);
    --shadow-card: 0 1px 3px rgba(31, 35, 40, 0.12), 0 1px 2px rgba(31, 35, 40, 0.08);
    --shadow-elevated: 0 8px 24px rgba(31, 35, 40, 0.15);

    /* Surfaces & overlays */
    --header-bg: rgba(255, 255, 255, 0.85);
    --track-bg: rgba(31, 35, 40, 0.08);
    --node-locked-bg: rgba(208, 215, 222, 0.55);

    /* Borders */
    --border-color: #d0d7de;
    --border-subtle: #e6eaef;

    /* Gray scale — voor donkere accenten op licht */
    --gray-200: #374151;
    --gray-300: #4b5563;
    --gray-400: #6b7280;
    --gray-500: #9ca3af;
    --gray-600: #d1d5db;
    --gray-700: #e5e7eb;

    /* Status colors */
    --status-success: #1a7f37;
    --status-error: #cf222e;
    --status-warning: #9a6700;
    --status-info: #0969da;

    /* Links */
    --link-hover: #0550ae;
    --link-active: #0969da;

    /* Skill tree nodes */
    --node-completed: #bf8700;
    --node-available: #0969da;
    --node-gate: #0891b2;
    --node-active: #8250df;

    /* Code & special */
    --bg-code: #f6f8fa;
    --code-text: #0550ae;
    --formula-text: #8250df;
}


/* --- Reset & Base --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
    transition: background 0.2s ease, color 0.2s ease;
}

a {
    color: var(--accent-blue);
    text-decoration: none;
    transition: color 0.15s ease;
}

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


/* --- Header --- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--header-bg);
    backdrop-filter: saturate(140%) blur(10px);
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.1rem;
}

.brand-icon {
    font-size: 1.4rem;
    filter: drop-shadow(var(--glow-blue));
}

.nav-links {
    display: flex;
    gap: 8px;
}

.nav-link {
    color: var(--text-secondary);
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.15s ease;
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.nav-user {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 0.875rem;
}

.user-xp {
    display: flex;
    align-items: center;
    gap: 4px;
    color: var(--accent-purple);
    font-weight: 600;
    padding: 4px 12px;
    background: rgba(188, 140, 255, 0.1);
    border: 1px solid rgba(188, 140, 255, 0.2);
    border-radius: 999px;
    font-size: 0.8rem;
}

.xp-icon {
    font-size: 0.9rem;
}

.user-email {
    color: var(--text-secondary);
}

.nav-settings {
    color: var(--text-muted) !important;
    font-size: 1.1rem;
    text-decoration: none;
}

.nav-settings:hover {
    color: var(--text-secondary) !important;
}

/* Menu-wrapper: links aan de ene kant, gebruiker aan de andere. */
.nav-menu {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    min-width: 0;
}

/* Gegroepeerd dropdown ("Voortgang") */
.nav-dropdown { position: relative; }
.nav-dropdown-toggle {
    background: none;
    border: none;
    font: inherit;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}
.nav-caret { font-size: 0.7em; transition: transform 0.15s ease; }
.nav-dropdown.open .nav-caret { transform: rotate(180deg); }
.nav-dropdown-menu {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    display: none;
    flex-direction: column;
    min-width: 190px;
    padding: 6px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-elevated);
    z-index: 200;
}
.nav-dropdown.open .nav-dropdown-menu { display: flex; }
.nav-dropdown-menu .nav-link { padding: 8px 12px; }

/* Hamburger (alleen op smalle schermen) */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
    width: 40px;
    height: 38px;
    background: none;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
}
.nav-toggle-bar {
    width: 18px;
    height: 2px;
    margin: 0 auto;
    background: var(--text-secondary);
    border-radius: 2px;
    transition: opacity 0.2s ease, transform 0.2s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* Tekstlabels naast icoon-knoppen: alleen zichtbaar in de mobiele lade. */
.nav-txt { display: none; }

.nav-logout {
    color: var(--text-muted) !important;
}

.theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    padding: 0;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1;
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.theme-toggle:hover {
    background: var(--bg-elevated);
    color: var(--text-primary);
    border-color: var(--accent-blue);
}

/* Directe hover-tooltips voor de nav-icoontjes (tandwiel + thema) */
.nav-settings,
.theme-toggle {
    position: relative;
}

.nav-settings[data-tooltip]::after,
.theme-toggle[data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    white-space: nowrap;
    background: var(--bg-elevated);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
    box-shadow: var(--shadow-card);
    opacity: 0;
    transform: translateY(-4px);
    pointer-events: none;
    transition: opacity 0.12s ease, transform 0.12s ease;
    z-index: 200;
}

.nav-settings[data-tooltip]:hover::after,
.theme-toggle[data-tooltip]:hover::after {
    opacity: 1;
    transform: translateY(0);
}


/* --- Main Content --- */
.main-content {
    flex: 1;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 32px 24px;
    width: 100%;
}


/* --- Hero --- */
.hero {
    text-align: center;
    padding: 64px 0 48px;
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.hero-subtitle {
    color: var(--text-secondary);
    font-size: 1.2rem;
    margin-bottom: 32px;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-top: 32px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    box-shadow: var(--shadow-card);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-purple);
    text-shadow: var(--glow-purple);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}


/* --- Homepage --- */
.home-header {
    text-align: center;
    padding: 40px 0 8px;
}

.home-header h1 {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 4px;
}

.home-subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 0;
}

.home-stats {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin: 28px 0;
    flex-wrap: wrap;
}

.home-stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px 28px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    box-shadow: var(--shadow-card);
    min-width: 120px;
    text-decoration: none;
}

.home-stat-action {
    cursor: pointer;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.home-stat-action:hover {
    border-color: var(--accent-blue);
    box-shadow: var(--glow-blue), var(--shadow-card);
}

.home-stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    font-family: var(--font-mono);
}

.home-stat-xp .home-stat-value {
    color: var(--accent-purple);
    text-shadow: var(--glow-purple);
}

.home-stat-alert {
    color: var(--accent-yellow) !important;
}

.home-stat-pending .home-stat-value {
    color: var(--accent-yellow);
}

.home-stat-total {
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: 400;
}

.home-stat-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.home-section {
    margin: 32px 0;
}

.home-section h2 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-secondary);
}

.home-active-list,
.home-grades-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.home-active-card,
.home-grade-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: inherit;
    transition: border-color 0.15s;
}

.home-active-card:hover {
    border-color: var(--accent-blue);
}

.home-active-id,
.home-grade-id {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 0.85rem;
    color: var(--accent-blue);
    min-width: 40px;
}

.home-active-title,
.home-grade-title {
    flex: 1;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.home-active-status {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 999px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.status-active {
    background: rgba(88, 166, 255, 0.12);
    color: var(--accent-blue);
}

.status-submitted {
    background: rgba(210, 153, 34, 0.12);
    color: var(--accent-yellow);
}

.home-grade-value {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1.1rem;
    min-width: 36px;
    text-align: right;
}

.home-actions {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin: 32px 0;
}

@media (max-width: 768px) {
    .home-stats {
        flex-direction: column;
        align-items: stretch;
    }

    .home-stat-card {
        flex-direction: row;
        justify-content: space-between;
        padding: 16px 20px;
    }

    .home-actions {
        flex-direction: column;
    }
}


/* --- Cards --- */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-card);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
    border-color: var(--accent-blue);
    box-shadow: var(--glow-blue), var(--shadow-card);
}


/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 24px;
    font-size: 0.95rem;
    font-weight: 600;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.15s ease;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-family: inherit;
}

.btn:hover {
    background: var(--bg-elevated);
    border-color: var(--text-muted);
    transform: translateY(-1px);
}

.btn-primary {
    background: linear-gradient(135deg, var(--btn-primary-start), var(--btn-primary-end));
    border-color: var(--btn-primary-end);
    color: white;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--btn-primary-end), var(--accent-blue));
    box-shadow: var(--glow-blue);
    color: white;
}

.btn-glow {
    box-shadow: var(--glow-blue);
}

.btn-full {
    width: 100%;
}

.btn-success {
    background: linear-gradient(135deg, var(--btn-success-start), var(--btn-success-end));
    border-color: var(--btn-success-end);
    color: white;
}

.btn-danger {
    background: linear-gradient(135deg, var(--btn-danger-start), var(--btn-danger-end));
    border-color: var(--btn-danger-end);
    color: white;
}


/* --- Forms --- */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="url"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 10px 14px;
    font-size: 0.95rem;
    font-family: inherit;
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.15);
}

/* Zichtbare focus-indicatie voor toetsenbordgebruikers.
   Formuliervelden hebben hun eigen box-shadow-ring hierboven; deze regel
   dekt links, knoppen, tabs en skill-tree-nodes die voorheen niets toonden. */
a:focus-visible,
button:focus-visible,
[role="button"]:focus-visible,
[tabindex]:focus-visible {
    outline: 2px solid var(--accent-blue);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* --- Lore-briefing (De Duinen) ---
   Eén klasse i.p.v. ~48 identieke inline-blokken in de opdracht-content. */
/* Vormgegeven als brief/notitie (hairlines boven en onder, boekletter),
   niet als gekleurde callout — de verhaallaag is correspondentie, geen tip. */
.lore-intro {
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    padding: var(--space-5) var(--space-3);
    margin: var(--space-6) 0;
    font-family: var(--font-serif);
    font-size: 1.05em;
    color: var(--text-primary);
    line-height: 1.75;
}
.lore-intro p { margin: 0 0 var(--space-3); }
.lore-intro p:last-child { margin-bottom: 0; }
.lore-intro .lore-sign {
    margin: var(--space-3) 0 0;
    text-align: right;
    font-style: italic;
    color: var(--text-secondary);
}
/* Karakter-notitie: zelfde brief-opmaak, iets kleiner (geschreven memo). */
.lore-intro.lore-note { font-size: 0.95em; }

/* --- Werkmap (leerling-notitieboek) --- */
.werkmap-item {
    margin: var(--space-3) 0;
    padding: var(--space-3) var(--space-4);
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
}
.werkmap-item-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
    font-size: var(--text-sm);
}
.werkmap-item-link .werkmap-item-id {
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    margin-right: var(--space-2);
}
.werkmap-briefing {
    font-family: var(--font-serif);
    color: var(--text-secondary);
    font-size: var(--text-sm);
    line-height: 1.65;
    margin-top: var(--space-2);
}
.werkmap-briefing p { margin: 0 0 var(--space-2); }
.werkmap-briefing .lore-sign { text-align: right; font-style: italic; }
.werkmap-note-locked {
    background: var(--bg-tertiary);
    border: 1px dashed var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--space-3) var(--space-5);
    margin: var(--space-3) 0;
    color: var(--text-muted);
    font-size: var(--text-sm);
}
.werkmap-section-tag {
    color: var(--text-muted);
    font-size: var(--text-xs);
    font-weight: normal;
    margin-left: var(--space-2);
}
.werkmap-empty { color: var(--text-secondary); font-style: italic; }

.form-group input[readonly] {
    opacity: 0.6;
}

.form-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 0.9rem;
}


/* --- Auth pages --- */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 60vh;
}

.auth-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 40px;
    width: 100%;
    max-width: 440px;
    box-shadow: var(--shadow-elevated);
}

.auth-card h1 {
    font-size: 1.5rem;
    margin-bottom: 24px;
    text-align: center;
}

.forced-info {
    background: rgba(88, 166, 255, 0.1);
    border: 1px solid rgba(88, 166, 255, 0.3);
    color: var(--accent-blue);
    padding: 12px 16px;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    margin-bottom: 20px;
    text-align: center;
}

.qr-container {
    display: flex;
    justify-content: center;
    margin: 24px 0;
    padding: 16px;
    background: white;
    border-radius: var(--radius-md);
    width: fit-content;
    margin-left: auto;
    margin-right: auto;
}

.qr-code {
    width: 200px;
    height: 200px;
}

.manual-key {
    text-align: center;
    margin-bottom: 24px;
}

.manual-key summary {
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.85rem;
}

.secret-key {
    display: block;
    margin-top: 8px;
    padding: 8px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    word-break: break-all;
    color: var(--accent-yellow);
}


/* --- Flash Messages --- */
.flash-messages {
    margin-bottom: 24px;
}

.flash {
    padding: 12px 16px;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    border: 1px solid;
}

.flash-error {
    background: rgba(248, 81, 73, 0.1);
    border-color: rgba(248, 81, 73, 0.3);
    color: var(--accent-red);
}

.flash-success {
    background: rgba(63, 185, 80, 0.1);
    border-color: rgba(63, 185, 80, 0.3);
    color: var(--accent-green);
}

.flash-info {
    background: rgba(88, 166, 255, 0.1);
    border-color: rgba(88, 166, 255, 0.3);
    color: var(--accent-blue);
}


/* --- Tables --- */
.table-container {
    overflow-x: auto;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    background: var(--bg-card);
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead th {
    text-align: left;
    padding: 12px 16px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

tbody td {
    padding: 12px 16px;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--border-subtle);
}

tbody tr:hover {
    background: var(--bg-tertiary);
}

tbody tr:last-child td {
    border-bottom: none;
}


/* --- Badges / Tags --- */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 999px;
}

.badge-pending {
    background: rgba(210, 153, 34, 0.15);
    color: var(--accent-yellow);
}

.badge-grading {
    background: rgba(88, 166, 255, 0.15);
    color: var(--accent-blue);
}

.badge-checked {
    background: rgba(63, 185, 80, 0.15);
    color: var(--accent-green);
}

.badge-late {
    background: rgba(248, 81, 73, 0.15);
    color: var(--accent-red);
}

.badge-ai {
    background: rgba(188, 140, 255, 0.15);
    color: var(--accent-purple);
}

.badge-resubmission {
    background: rgba(240, 136, 62, 0.15);
    color: var(--accent-orange);
}


/* --- Dashboard --- */
.dashboard h1 {
    margin-bottom: 24px;
}

.stats-row {
    display: flex;
    gap: 16px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.stats-row .stat-card {
    flex: 1;
    min-width: 120px;
    padding: 20px;
}

.dashboard-section {
    margin-bottom: 32px;
}

.dashboard-section h2 {
    font-size: 1.2rem;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.empty-state {
    padding: 48px 24px;
    text-align: center;
    background: var(--bg-card);
    border: 1px dashed var(--border-color);
    border-radius: var(--radius-lg);
}


/* --- Assignments --- */
.assignments-page h1 {
    margin-bottom: 8px;
}

.domain-grid {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.domain-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 24px;
    box-shadow: var(--shadow-card);
}

.domain-header {
    font-size: 1.1rem;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.domain-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 0.9rem;
    background: var(--domain-color, var(--accent-blue));
    color: var(--bg-primary);
}

.assignment-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.assignment-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.15s ease;
}

.assignment-card:hover {
    border-color: var(--domain-color, var(--accent-blue));
    background: var(--bg-tertiary);
    box-shadow: 0 0 8px rgba(88, 166, 255, 0.1);
}

.assignment-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.assignment-id {
    font-weight: 700;
    font-size: 0.85rem;
    color: var(--domain-color, var(--accent-blue));
    min-width: 40px;
}

.assignment-title {
    font-size: 0.95rem;
}

.assignment-meta {
    display: flex;
    gap: 8px;
    align-items: center;
}

.level-badge {
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: 999px;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.xp-badge {
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: 999px;
    background: rgba(188, 140, 255, 0.1);
    color: var(--accent-purple);
    font-weight: 600;
}


/* --- Badges --- */
.home-badges-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.home-badge-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.home-badge-card.badge-tier-bronze { border-left: 3px solid var(--accent-orange); }
.home-badge-card.badge-tier-silver { border-left: 3px solid var(--accent-blue); }
.home-badge-card.badge-tier-gold { border-left: 3px solid var(--node-completed); }
.home-badge-card.badge-tier-secret { border-left: 3px solid var(--accent-purple); }

.badge-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
    width: 36px;
    text-align: center;
}

.badge-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.badge-name {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.badge-desc {
    font-size: 0.8rem;
    color: var(--text-secondary);
}


/* --- Growth Charts --- */
.growth-charts {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.chart-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow-card);
}

.chart-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.chart-container {
    position: relative;
    height: 220px;
}

.chart-container-radar {
    height: 260px;
}

.chart-container-histogram {
    height: 240px;
}

.chart-empty {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-muted);
    font-size: 0.9rem;
    text-align: center;
    padding: 24px;
}

@media (max-width: 768px) {
    .growth-charts {
        grid-template-columns: 1fr;
    }
}


/* --- Milestones Timeline --- */
.milestones-timeline {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.milestone-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: border-color 0.15s;
}

.milestone-item:hover {
    border-color: var(--accent-blue);
}

.milestone-icon {
    font-size: 1.4rem;
    flex-shrink: 0;
    width: 36px;
    text-align: center;
}

.milestone-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.milestone-title {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.milestone-detail {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.milestone-date {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    white-space: nowrap;
}


/* --- Klasoverzicht --- */
.klas-header {
    text-align: center;
    padding: 40px 0 8px;
}

.klas-header h1 {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 4px;
}

.klas-subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
}

.klas-visibility {
    text-align: center;
    margin: 16px 0 24px;
    padding: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.visibility-toggle {
    justify-content: center;
    font-weight: 500;
}

.klas-explanation {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 12px;
}


/* --- Growth List --- */
.growth-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.growth-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.growth-item-self {
    border-color: var(--accent-purple);
    background: rgba(188, 140, 255, 0.05);
}

.growth-rank {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--accent-blue);
    min-width: 30px;
}

.growth-name {
    flex: 1;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.growth-xp {
    font-family: var(--font-mono);
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--accent-green);
}


/* --- Badge Distribution --- */
.badge-dist-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.badge-dist-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.badge-dist-item.badge-tier-bronze { border-left: 3px solid var(--accent-orange); }
.badge-dist-item.badge-tier-silver { border-left: 3px solid var(--accent-blue); }
.badge-dist-item.badge-tier-gold { border-left: 3px solid var(--node-completed); }

.badge-dist-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.badge-dist-bar-container {
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: 3px;
    overflow: hidden;
}

.badge-dist-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
    border-radius: 3px;
    transition: width 0.5s ease;
    min-width: 2px;
}

.badge-dist-count {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-secondary);
    min-width: 40px;
    text-align: right;
}


/* --- Footer --- */
.site-footer {
    text-align: center;
    padding: 24px;
    color: var(--text-muted);
    font-size: 0.8rem;
    border-top: 1px solid var(--border-subtle);
}


/* --- Utility --- */
.text-muted { color: var(--text-secondary); }
.text-center { text-align: center; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }


/* --- Responsive --- */
@media (max-width: 768px) {
    .nav-container {
        padding: 0 16px;
        gap: 12px;
    }

    .nav-toggle { display: flex; }

    /* Het hele menu wordt een uitklapbare lade onder de balk. */
    .nav-menu {
        position: absolute;
        top: 56px;
        left: 0;
        right: 0;
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
        padding: 10px 16px 16px;
        background: var(--bg-secondary);
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-elevated);
    }
    .nav-menu.open { display: flex; }

    .nav-links {
        flex-direction: column;
        align-items: stretch;
        gap: 2px;
        width: 100%;
    }
    .nav-links .nav-link { padding: 10px 12px; }

    /* Voortgang-groep plat tonen in de lade, met label en inspringing. */
    .nav-dropdown { width: 100%; }
    .nav-dropdown-toggle {
        width: 100%;
        color: var(--text-muted);
        font-size: 0.78rem;
        text-transform: uppercase;
        letter-spacing: 0.04em;
        padding: 10px 12px 4px;
        cursor: default;
    }
    .nav-caret { display: none; }
    .nav-dropdown-menu {
        position: static;
        display: flex;
        min-width: 0;
        padding: 0 0 0 12px;
        background: none;
        border: none;
        box-shadow: none;
    }

    .nav-user {
        flex-direction: column;
        align-items: stretch;
        gap: 6px;
        margin-top: 8px;
        padding-top: 12px;
        border-top: 1px solid var(--border-color);
    }
    .user-xp { align-self: flex-start; }
    .user-email { display: block; padding: 4px 12px; }

    /* Icoon-knoppen krijgen in de lade hun tekstlabel ernaast (nav-txt). */
    .nav-user .nav-settings,
    .nav-user .theme-toggle {
        align-self: flex-start;
        width: auto;
        height: auto;
        display: inline-flex;
        align-items: center;
        gap: 10px;
        padding: 10px 12px;
    }
    .nav-txt { display: inline; font-size: 0.9rem; color: var(--text-secondary); }

    .hero h1 {
        font-size: 2rem;
    }

    .auth-card {
        padding: 24px;
        margin: 0 16px;
    }

    .stat-card {
        padding: 16px 24px;
    }
}


/* --- Animations --- */
@keyframes pulse-glow {
    0%, 100% { box-shadow: 0 0 8px rgba(88, 166, 255, 0.2); }
    50% { box-shadow: 0 0 20px rgba(88, 166, 255, 0.4); }
}

@keyframes fade-in {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-in {
    animation: fade-in 0.3s ease-out;
}

.pulse {
    animation: pulse-glow 2s ease-in-out infinite;
}

/* Tijdelijke XP badge in navbar */
.gp-badge {
    color: var(--formula-text);
    font-size: 0.8em;
}

/* ── Impersonatie ('bekijken als leerling') ───────────────────────────────── */
/* Opvallende amberkleurige balk bovenaan elke pagina zolang een docent als een
   leerling bekijkt, met een knop om terug te keren. */
.impersonation-banner {
    position: sticky;
    top: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    padding: 8px 16px;
    background: var(--status-warning);
    color: #1f2328;
    font-size: 0.9rem;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.impersonation-banner .impersonation-form {
    margin: 0;
}

.impersonation-back {
    background: #1f2328;
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    padding: 5px 12px;
    font-weight: 600;
    cursor: pointer;
}

.impersonation-back:hover {
    background: #000;
}

/* Knop in de leerlingenlijst van het docent-dashboard. */
.student-actions {
    display: flex;
    gap: 6px;
    align-items: center;
    flex-wrap: wrap;
}

.student-actions .impersonate-form {
    margin: 0;
}

.btn-impersonate {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

/* Ingeklapte gates-sectie op het opdrachten-tabblad */
.gates-inklap > summary { cursor: pointer; padding: 6px 0; }
.gates-inklap[open] > summary { margin-bottom: 8px; }

/* Respecteer de systeeminstelling 'minder beweging' (WCAG 2.3.3) */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* --- Demo-omgeving (opendag) --- */
.demo-banner {
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: var(--text-sm);
    text-align: center;
    padding: var(--space-2) var(--space-4);
}
.demo-login-intro {
    color: var(--text-secondary);
    font-size: var(--text-sm);
    line-height: 1.6;
    margin-bottom: var(--space-4);
}
.hero .btn { margin: 4px 6px; }
.hero-demo-form { display: inline-block; margin: 4px 6px; }
.hero-demo-form .btn { margin: 0; }
.demo-banner a { color: var(--accent-blue); margin-left: 6px; }