diff --git a/static/global.css b/static/global.css
index dfcbdb7..9fe208a 100644
--- a/static/global.css
+++ b/static/global.css
@@ -37,11 +37,85 @@
     --shadow: 0 1px 3px rgba(15, 23, 42, .08), 0 4px 12px rgba(15, 23, 42, .05);
     --shadow-lg: 0 10px 30px rgba(15, 23, 42, .18);
 
+    /* Overige vlakken */
+    --header-bg: var(--primary-color);
+    --row-hover: #f8fbfe;
+    --badge-bg: #e2e8f0;  --badge-text: #334155;
+    --overlay: rgba(255, 255, 255, .85);
+
     --header-height: 64px;
     --page-width: 1200px;
     --font: "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
 }
 
+/* ---------- 1b. Donker thema (aan/uit via het gebruikersmenu rechtsboven) ---------- */
+/* Alleen op scherm: afdrukken gebeurt altijd in het lichte thema */
+@media screen {
+    html[data-theme="dark"] {
+        color-scheme: dark;
+
+        --primary-color: #3a8cc9;
+        --primary-dark: #2d73a8;
+        --primary-light: #17324a;
+        --background-color: #0f172a;
+
+        --surface: #1e293b;
+        --surface-muted: #172033;
+        --border: #334155;
+        --border-strong: #475569;
+        --text: #e2e8f0;
+        --text-muted: #94a3b8;
+
+        --success-bg: #14361f;  --success-text: #86efac;
+        --warning-bg: #3a300b;  --warning-text: #fde047;
+        --danger-bg:  #3f1515;  --danger-text:  #fca5a5;
+        --info-bg:    #172a4d;  --info-text:    #93c5fd;
+
+        --shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);
+        --shadow: 0 1px 3px rgba(0, 0, 0, .4), 0 4px 12px rgba(0, 0, 0, .25);
+        --shadow-lg: 0 10px 30px rgba(0, 0, 0, .6);
+
+        --header-bg: #13304a;
+        --row-hover: #243349;
+        --badge-bg: #334155;  --badge-text: #e2e8f0;
+        --overlay: rgba(15, 23, 42, .85);
+    }
+    html[data-theme="dark"] .flash-message,
+    html[data-theme="dark"] .flash-message.success,
+    html[data-theme="dark"] .flash-message.error,
+    html[data-theme="dark"] .flash-message.danger,
+    html[data-theme="dark"] .flash-message.warning { border-color: var(--border); }
+    html[data-theme="dark"] .dash-section-title.admin::after { background: var(--danger-bg); }
+    html[data-theme="dark"] .tile.tile-tools .tile-icon,
+    html[data-theme="dark"] .tile.tile-tools .tile-links a:hover { background: #123b38; }
+    html[data-theme="dark"] .tile.tile-tools h3,
+    html[data-theme="dark"] .tile.tile-tools .tile-links a:hover { color: #5eead4; }
+    html[data-theme="dark"] .tile.tile-scholengroep .tile-icon,
+    html[data-theme="dark"] .tile.tile-scholengroep .tile-links a:hover { background: #2e1f52; }
+    html[data-theme="dark"] .tile.tile-scholengroep h3,
+    html[data-theme="dark"] .tile.tile-scholengroep .tile-links a:hover { color: #c4b5fd; }
+    html[data-theme="dark"] .google-btn { background: var(--surface); color: var(--text); border-color: var(--border-strong); }
+    html[data-theme="dark"] .google-btn:hover { background: var(--surface-muted); }
+    html[data-theme="dark"] body.auth-page { background: var(--background-color); }
+    html[data-theme="dark"] mark { background: #854d0e; color: #fef9c3; }
+
+    /* Pagina's met eigen pastelkleuren (gemarkeerde rijen, legendes, filters) */
+    html[data-theme="dark"] .tellers .let,
+    html[data-theme="dark"] .filters button.let { background: var(--warning-bg); border-color: #854d0e; }
+    html[data-theme="dark"] .filters button.let[aria-pressed="true"] { background: #854d0e; color: #fef9c3; }
+    html[data-theme="dark"] td.leeg,
+    html[data-theme="dark"] tr.flagged td,
+    html[data-theme="dark"] table.aw .vandaag,
+    html[data-theme="dark"] td.inv input.gewijzigd,
+    html[data-theme="dark"] .panel.directie,
+    html[data-theme="dark"] .panel.vraag { background: #2e2710 !important; border-color: #854d0e; }
+    html[data-theme="dark"] tr.rij-fout td { background: #3a1a1a; }
+    html[data-theme="dark"] button.st:not(.aanwezig):not(.afwezig) { background: var(--surface-muted); border-color: var(--border-strong); color: var(--text-muted); }
+    html[data-theme="dark"] #personeelBody tr.g-account td, html[data-theme="dark"] .legende i.account { background: #14361f; border-color: #166534; }
+    html[data-theme="dark"] #personeelBody tr.g-alias td,   html[data-theme="dark"] .legende i.alias   { background: #3a2a10; border-color: #9a5b13; }
+    html[data-theme="dark"] #personeelBody tr.g-geen td,    html[data-theme="dark"] .legende i.geen    { background: #3a1a1a; border-color: #991b1b; }
+}
+
 /* ---------- 2. Basis ---------- */
 *, *::before, *::after { box-sizing: border-box; }
 
@@ -84,7 +158,7 @@ a  { color: var(--primary-color); }
     align-items: center;
     gap: 16px;
     padding: 0 24px;
-    background: var(--primary-color);
+    background: var(--header-bg);
     color: #fff;
     box-shadow: 0 2px 8px rgba(0, 0, 0, .15);
 }
@@ -130,10 +204,29 @@ a  { color: var(--primary-color); }
 }
 .home-btn, .header-btn { background: rgba(255, 255, 255, .16); color: #fff; }
 .home-btn:hover, .header-btn:hover { background: rgba(255, 255, 255, .28); }
-.logout-btn { background: #fff; color: var(--danger); }
+.logout-btn { background: var(--surface); color: var(--danger); }
 .logout-btn:hover { background: var(--danger-bg); }
 .app-header form { margin: 0; }
 
+/* Gebruikersmenu (klik op je naam rechtsboven) */
+.user-menu { position: relative; }
+.user-menu-btn { opacity: 1; font-weight: 500; }
+.user-menu-btn .caret { font-size: 10px; opacity: .8; }
+.user-menu-panel {
+    display: none;
+    position: absolute; right: 0; top: calc(100% + 8px);
+    z-index: 1100;
+    min-width: 260px;
+    padding: 6px 14px;
+    background: var(--surface); color: var(--text);
+    border: 1px solid var(--border); border-radius: var(--radius);
+    box-shadow: var(--shadow-lg);
+}
+.user-menu.open .user-menu-panel { display: block; }
+.user-menu-head { padding: 8px 0 10px; border-bottom: 1px solid var(--border); font-size: 13px; color: var(--text-muted); overflow-wrap: anywhere; }
+.user-menu-head strong { display: block; color: var(--text); font-size: 14px; }
+.user-menu-panel .switch-row { font-size: 14px; font-weight: 500; cursor: pointer; }
+
 /* ---------- 4. Pagina-layout ---------- */
 .app-main {
     flex: 1;
@@ -187,7 +280,7 @@ select, textarea {
     font: inherit;
     font-size: 15px;
     color: var(--text);
-    background: #fff;
+    background: var(--surface);
     border: 1px solid var(--border-strong);
     border-radius: var(--radius-sm);
     transition: border-color .15s, box-shadow .15s;
@@ -260,7 +353,7 @@ button:disabled, .btn:disabled { opacity: .5; cursor: not-allowed; }
 
 .btn-secondary { background: #475569; }
 .btn-secondary:hover { background: #334155; }
-.btn-light { background: #fff; color: var(--text); border-color: var(--border-strong); }
+.btn-light { background: var(--surface); color: var(--text); border-color: var(--border-strong); }
 .btn-light:hover { background: var(--surface-muted); }
 .btn-success { background: var(--success); }
 .btn-success:hover { background: #15803d; }
@@ -291,7 +384,7 @@ button:disabled, .btn:disabled { opacity: .5; cursor: not-allowed; }
     border-radius: var(--radius);
     margin-top: 12px;
 }
-table { width: 100%; border-collapse: collapse; background: #fff; text-align: left; }
+table { width: 100%; border-collapse: collapse; background: var(--surface); text-align: left; }
 th, td { padding: 11px 14px; border-bottom: 1px solid var(--border); vertical-align: middle; }
 th {
     background: var(--surface-muted);
@@ -299,7 +392,7 @@ th {
     color: var(--text-muted); white-space: nowrap;
 }
 tbody tr:last-child td { border-bottom: 0; }
-tbody tr:hover { background: #f8fbfe; }
+tbody tr:hover { background: var(--row-hover); }
 td.actions, th.actions { text-align: right; white-space: nowrap; }
 td.actions form { display: inline; margin: 0; }
 td.actions > * + * { margin-left: 6px; }
@@ -324,7 +417,7 @@ td.center, th.center { text-align: center; }
     display: inline-flex; align-items: center; gap: 4px;
     padding: 3px 10px; border-radius: 999px;
     font-size: 12.5px; font-weight: 600; white-space: nowrap;
-    background: #e2e8f0; color: #334155;
+    background: var(--badge-bg); color: var(--badge-text);
 }
 .badge-success { background: var(--success-bg); color: var(--success-text); }
 .badge-warning { background: var(--warning-bg); color: var(--warning-text); }
@@ -448,7 +541,7 @@ td.center, th.center { text-align: center; }
     position: fixed; inset: 0;
     z-index: 9999;
     flex-direction: column; justify-content: center; align-items: center; gap: 16px;
-    background: rgba(255, 255, 255, .85);
+    background: var(--overlay);
     backdrop-filter: blur(2px);
 }
 .spinner {
@@ -563,6 +656,8 @@ body.auth-page { background: linear-gradient(160deg, #eaf2f9 0%, var(--backgroun
 /* ---------- 17. Responsief ---------- */
 @media (max-width: 900px) {
     .brand-school, .header-user { display: none; }
+    .user-menu-btn { display: inline-flex; }
+    .user-menu-btn .user-naam { display: none; }
 }
 @media (max-width: 720px) {
     .app-header {
diff --git a/templates/Inventaris_Leerlingen.html b/templates/Inventaris_Leerlingen.html
index 5b5a27d..db73100 100644
--- a/templates/Inventaris_Leerlingen.html
+++ b/templates/Inventaris_Leerlingen.html
@@ -7,7 +7,7 @@
 <style>
     /* Bewerken-knop altijd zichtbaar: laatste kolom blijft rechts staan bij horizontaal scrollen */
     .lln-tabel td.actions, .lln-tabel th.actions {
-        position: sticky; right: 0; background: #fff; white-space: nowrap;
+        position: sticky; right: 0; background: var(--surface); white-space: nowrap;
         box-shadow: -6px 0 6px -6px rgba(15, 23, 42, .15);
     }
     .lln-tabel th.actions { background: var(--surface-muted); }
diff --git a/templates/afwezigheden.html b/templates/afwezigheden.html
index 4107d2b..ea568d0 100644
--- a/templates/afwezigheden.html
+++ b/templates/afwezigheden.html
@@ -21,7 +21,7 @@
     tr.lln.open td:first-child::before { transform: rotate(90deg); }
     tr.detail td { background: var(--surface-muted); padding: 10px 14px 14px 44px; }
     .day-chips { display: flex; flex-wrap: wrap; gap: 6px; }
-    .day-chip { display: inline-flex; gap: 6px; align-items: center; padding: 4px 10px; border-radius: 999px; background: #fff;
+    .day-chip { display: inline-flex; gap: 6px; align-items: center; padding: 4px 10px; border-radius: 999px; background: var(--surface);
                 border: 1px solid var(--border); font-size: 13px; }
     .day-chip .dd { font-weight: 700; color: var(--danger-text); }
     .count-badge { display: inline-block; min-width: 34px; text-align: center; padding: 3px 10px; border-radius: 999px; font-weight: 700;
diff --git a/templates/base.html b/templates/base.html
index 281aab0..05693c4 100644
--- a/templates/base.html
+++ b/templates/base.html
@@ -4,6 +4,10 @@
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>{% block title %}PIVOT{% endblock %} – {{ school_name_short|upper or 'PIVOT' }}</title>
+    <script>
+        /* Thema meteen toepassen (vóór het tekenen) zodat de pagina niet eerst licht oplicht */
+        try { if (localStorage.getItem('pivot.thema') === 'donker') document.documentElement.dataset.theme = 'dark'; } catch (e) { /* geen opslag */ }
+    </script>
     <link rel="icon" type="image/png" href="{{ url_for('static', filename='pivot_mark.png') }}">
     <link rel="stylesheet" href="{{ url_for('static', filename='global.css') }}">
     {% block head %}{% endblock %}
@@ -44,7 +48,7 @@
                         onchange="if (this.value) location.href = this.value">
                     <option value="" selected>🏫 {{ school.naam }} ⇄</option>
                     {% for s in andere_scholen %}
-                    <option value="{{ url_for('scholen.wissel', code=s.code) }}" style="color:#1e293b">{{ s.naam }}</option>
+                    <option value="{{ url_for('scholen.wissel', code=s.code) }}" style="color:var(--text)">{{ s.naam }}</option>
                     {% endfor %}
                 </select>
                 {% else %}
@@ -52,7 +56,22 @@
                 {% endif %}
             {% endif %}
             {% if session.get('user') %}
-                <span class="header-user">👤 {{ session.get('user') }}</span>
+                <div class="user-menu" id="user-menu">
+                    <button type="button" class="header-btn header-user user-menu-btn" id="user-menu-btn"
+                            aria-haspopup="true" aria-expanded="false" aria-controls="user-menu-panel" title="Gebruikersmenu">
+                        👤 <span class="user-naam">{{ session.get('user') }}</span> <span class="caret">▼</span>
+                    </button>
+                    <div class="user-menu-panel" id="user-menu-panel">
+                        <div class="user-menu-head">Aangemeld als <strong>{{ session.get('user') }}</strong></div>
+                        <label class="switch-row" for="thema-schakelaar">
+                            <span>🌙 Donker thema</span>
+                            <span class="switch">
+                                <input type="checkbox" id="thema-schakelaar">
+                                <span class="slider"></span>
+                            </span>
+                        </label>
+                    </div>
+                </div>
             {% endif %}
             <form action="{{ url_for('auth.logout') }}" method="get">
                 <button type="submit" class="logout-btn">Uitloggen</button>
@@ -134,6 +153,35 @@
             });
         }, 6000);
 
+        // Gebruikersmenu rechtsboven + donker thema aan/uit (onthouden in deze browser)
+        (function () {
+            const menu = document.getElementById('user-menu');
+            if (!menu) return;
+            const knop = document.getElementById('user-menu-btn');
+            const schakelaar = document.getElementById('thema-schakelaar');
+            function zetOpen(open) {
+                menu.classList.toggle('open', open);
+                knop.setAttribute('aria-expanded', open);
+            }
+            knop.addEventListener('click', function (e) {
+                e.stopPropagation();
+                zetOpen(!menu.classList.contains('open'));
+            });
+            document.addEventListener('click', function (e) {
+                if (!menu.contains(e.target)) zetOpen(false);
+            });
+            document.addEventListener('keydown', function (e) {
+                if (e.key === 'Escape') zetOpen(false);
+            });
+
+            schakelaar.checked = document.documentElement.dataset.theme === 'dark';
+            schakelaar.addEventListener('change', function () {
+                if (schakelaar.checked) document.documentElement.dataset.theme = 'dark';
+                else delete document.documentElement.dataset.theme;
+                try { localStorage.setItem('pivot.thema', schakelaar.checked ? 'donker' : 'licht'); } catch (err) { /* negeren */ }
+            });
+        })();
+
         // Escape sluit open modals
         document.addEventListener('keydown', function (e) {
             if (e.key !== 'Escape') return;
diff --git a/templates/database_eigendom.html b/templates/database_eigendom.html
index 0f65fff..53c6935 100644
--- a/templates/database_eigendom.html
+++ b/templates/database_eigendom.html
@@ -23,7 +23,7 @@
     .modus-keuze small { display: block; color: var(--text-muted); font-weight: 400; }
     .tellers { display: flex; flex-wrap: wrap; gap: 10px; margin: 6px 0 14px; }
     .teller-knop { all: unset; cursor: pointer; display: inline-flex; gap: 8px; align-items: center; padding: 8px 14px;
-                   border-radius: var(--radius); border: 1px solid var(--border); background: #fff; font-weight: 600; font-size: 14px; }
+                   border-radius: var(--radius); border: 1px solid var(--border); background: var(--surface); font-weight: 600; font-size: 14px; }
     .teller-knop.actief { border-color: var(--primary-color); box-shadow: 0 0 0 2px rgba(30,111,165,.18); }
     .teller-knop .n { font-size: 18px; }
     tr.rij-fout td { background: #fff7f7; }
diff --git a/templates/database_toestellen.html b/templates/database_toestellen.html
index 36c15a9..61adcff 100644
--- a/templates/database_toestellen.html
+++ b/templates/database_toestellen.html
@@ -23,7 +23,7 @@
     .modus-keuze small { display: block; color: var(--text-muted); font-weight: 400; }
     .tellers { display: flex; flex-wrap: wrap; gap: 10px; margin: 6px 0 14px; }
     .teller-knop { all: unset; cursor: pointer; display: inline-flex; gap: 8px; align-items: center; padding: 8px 14px;
-                   border-radius: var(--radius); border: 1px solid var(--border); background: #fff; font-weight: 600; font-size: 14px; }
+                   border-radius: var(--radius); border: 1px solid var(--border); background: var(--surface); font-weight: 600; font-size: 14px; }
     .teller-knop.actief { border-color: var(--primary-color); box-shadow: 0 0 0 2px rgba(30,111,165,.18); }
     .teller-knop .n { font-size: 18px; }
     tr.rij-fout td { background: #fff7f7; }
diff --git a/templates/gopro.html b/templates/gopro.html
index 1f8e714..d31c2cd 100644
--- a/templates/gopro.html
+++ b/templates/gopro.html
@@ -23,7 +23,7 @@
     #personeelBody tr.g-account td { background: #e8f7ee; }
     #personeelBody tr.g-alias td   { background: #fff1e0; }
     #personeelBody tr.g-geen td    { background: #fdeaea; }
-    #personeelBody tr[class*="g-"] input.adres, #personeelBody tr[class*="g-"] select.rol { background: #fff; }
+    #personeelBody tr[class*="g-"] input.adres, #personeelBody tr[class*="g-"] select.rol { background: var(--surface); }
     .legende { display: flex; flex-wrap: wrap; gap: 6px 18px; align-items: center; margin: -6px 0 14px; font-size: .88em; color: var(--text-muted); }
     .legende button.kleurfilter { all: unset; box-sizing: border-box; cursor: pointer; display: inline-flex; align-items: center;
                                   gap: 6px; padding: 4px 10px; border-radius: 999px; border: 1px solid transparent; }
diff --git a/templates/personeel_dagoverzicht.html b/templates/personeel_dagoverzicht.html
index 2b37682..faab449 100644
--- a/templates/personeel_dagoverzicht.html
+++ b/templates/personeel_dagoverzicht.html
@@ -11,7 +11,7 @@
     .nav-bar form { display: flex; gap: 6px; margin: 0; }
     .nav-bar input[type=date] { width: auto; }
     .seg { display: inline-flex; border: 1px solid var(--border-strong); border-radius: var(--radius-sm); overflow: hidden; }
-    .seg a { padding: 8px 14px; text-decoration: none; color: var(--text); font-weight: 600; font-size: 14px; background: #fff; }
+    .seg a { padding: 8px 14px; text-decoration: none; color: var(--text); font-weight: 600; font-size: 14px; background: var(--surface); }
     .seg a.on { background: var(--primary-color); color: #fff; }
     .day { margin-bottom: 20px; }
     .day-head { display: flex; align-items: baseline; gap: 12px; margin-bottom: 10px; }
diff --git a/templates/personeel_nieuw.html b/templates/personeel_nieuw.html
index 16a7309..12a541f 100644
--- a/templates/personeel_nieuw.html
+++ b/templates/personeel_nieuw.html
@@ -8,18 +8,18 @@
 {% block extra_css %}
 <style>
     .soort-switch { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 18px; }
-    .soort-switch a { padding: 8px 14px; border-radius: 999px; border: 1px solid var(--border); background: #fff; text-decoration: none; color: var(--text); font-weight: 600; font-size: 14px; }
+    .soort-switch a { padding: 8px 14px; border-radius: 999px; border: 1px solid var(--border); background: var(--surface); text-decoration: none; color: var(--text); font-weight: 600; font-size: 14px; }
     .soort-switch a.on { background: var(--primary-color); border-color: var(--primary-color); color: #fff; }
     .grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
     .grid3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 0 16px; }
     @media (max-width: 640px) { .grid2, .grid3 { grid-template-columns: 1fr; } }
     .dagdeel { display: flex; gap: 6px; flex-wrap: wrap; }
-    .dagdeel label { display: inline-flex; align-items: center; gap: 6px; padding: 8px 12px; border: 1px solid var(--border); border-radius: var(--radius-sm); background: #fff; cursor: pointer; font-weight: 500; }
+    .dagdeel label { display: inline-flex; align-items: center; gap: 6px; padding: 8px 12px; border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--surface); cursor: pointer; font-weight: 500; }
     .dagdeel input:checked + span { font-weight: 700; color: var(--primary-color); }
     .klassen-box { border: 1px solid var(--border); border-radius: var(--radius); padding: 10px; background: var(--surface-muted); }
     .klassen-box input[type=search] { margin-bottom: 8px; }
     .klassen { display: flex; flex-wrap: wrap; gap: 6px; max-height: 210px; overflow-y: auto; }
-    .klas { display: inline-flex; align-items: center; gap: 5px; padding: 4px 10px; border: 1px solid var(--border); border-radius: 999px; background: #fff; font-size: 13px; font-weight: 600; cursor: pointer; user-select: none; }
+    .klas { display: inline-flex; align-items: center; gap: 5px; padding: 4px 10px; border: 1px solid var(--border); border-radius: 999px; background: var(--surface); font-size: 13px; font-weight: 600; cursor: pointer; user-select: none; }
     .klas input { width: 14px; height: 14px; }
     .klas.on { background: var(--primary-light); border-color: var(--primary-color); color: var(--primary-color); }
     .gekozen { font-size: 13px; color: var(--text-muted); margin-top: 6px; }
diff --git a/templates/tweestaps.html b/templates/tweestaps.html
index 7a7f524..fdd3648 100644
--- a/templates/tweestaps.html
+++ b/templates/tweestaps.html
@@ -21,7 +21,7 @@
     .code-panel { margin-top: 18px; border: 2px solid var(--success); border-radius: var(--radius-lg); background: var(--success-bg); padding: 20px; text-align: center; }
     .big-code { font-family: ui-monospace, Consolas, monospace; font-size: 40px; font-weight: 800; letter-spacing: 6px; color: var(--success-text); margin: 6px 0 4px; }
     .code-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 6px; margin-top: 12px; }
-    .code-grid span { font-family: ui-monospace, Consolas, monospace; background: #fff; border: 1px solid var(--border); border-radius: 6px; padding: 6px; font-size: 15px; }
+    .code-grid span { font-family: ui-monospace, Consolas, monospace; background: var(--surface); border: 1px solid var(--border); border-radius: 6px; padding: 6px; font-size: 15px; }
     details summary { cursor: pointer; color: var(--text-muted); font-size: 14px; margin-top: 12px; }
     .exception-active { margin-top: 14px; }
     .pick-list { list-style: none; margin: 10px 0 0; padding: 0; }