diff --git a/inventory/routes/index.py b/inventory/routes/index.py
index eff0caf..99c8610 100644
--- a/inventory/routes/index.py
+++ b/inventory/routes/index.py
@@ -36,6 +36,10 @@ def coffee():
     matrix, clicked = generate_solvable_matrix(level)
     return render_template("coffee.html", matrix=matrix, level=level, clicked=clicked)
 
+@main.route("/playground")
+def playground():
+    return render_template("playground.html")
+
 @main.route("/")
 def index():
     worklog_query = eager_load_worklog_relationships(
diff --git a/inventory/templates/coffee.html b/inventory/templates/coffee.html
index bb0684d..8a2b56c 100644
--- a/inventory/templates/coffee.html
+++ b/inventory/templates/coffee.html
@@ -7,11 +7,11 @@
 {% endblock %}
 
 {% block content %}
-    <div class="container border border-black rounded bg-success-subtle">
+    <div class="container border border-black bg-success-subtle">
         {% for x in range(level + 3) %}
             <div class="row" style="min-height: {{ 80 / (level + 3) }}vh;">
                 {% for y in range(level + 3) %}
-                <div class="col m-2 p-0 align-items-center d-flex justify-content-center border border-{% if (x, y) in clicked and false %}danger border-2{% else %}black{% endif %} rounded light shadow" id="light-{{ x }}-{{ y }}">
+                <div class="col m-0 p-0 align-items-center d-flex justify-content-center outline outline-{% if (x, y) in clicked and false %}danger border-2{% else %}black{% endif %} light" id="light-{{ x }}-{{ y }}">
                     <div class="form-check">
                         <input type="checkbox" class="form-check-input d-none" id="checkbox-{{ x }}-{{ y }}"{% if matrix[x][y] %} checked{% endif %}>
                     </div>
@@ -85,7 +85,7 @@
             // Check if all checkboxes are checked
             const allChecked = Array.from(document.querySelectorAll('.form-check-input')).every(cb => cb.checked);
             const allUnchecked = Array.from(document.querySelectorAll('.form-check-input')).every(cb => !cb.checked);
-            if (allChecked && !window.__alreadyNavigated && {{ level }} < 28) {
+            if (allChecked && !window.__alreadyNavigated && {{ level }} < 51) {
                 window.__alreadyNavigated = true;
                 location.href = "{{ url_for('main.coffee', level=level + 1) }}";
             } else if (allUnchecked && !window.__alreadyNavigated && {{ level }} > -2) {
diff --git a/inventory/templates/fragments/_combobox_fragment.html b/inventory/templates/fragments/_combobox_fragment.html
index c28dcca..e13c21e 100644
--- a/inventory/templates/fragments/_combobox_fragment.html
+++ b/inventory/templates/fragments/_combobox_fragment.html
@@ -42,3 +42,150 @@
         });
     </script>
 {% endmacro %}
+
+{% macro dynamic_combobox(
+    id, options, label = none, placeholder = none, data_attributes = none,
+    create_url = none, edit_url = none, delete_url = none, refresh_url = none
+) %}
+    {% if label %}
+        <label for="{{ id }}-input" class="form-label">{{ label }}</label>
+    {% endif %}
+    <div id="{{ id }}-container"
+        x-data="ComboBox({
+            id: '{{ id }}',
+            createUrl: {{ create_url|tojson if create_url else 'null' }},
+            editUrl: {{ edit_url|tojson if edit_url else 'null' }},
+            deleteUrl: {{ dekete_url|tojson if delete_url else 'null' }},
+            refreshUrl: {{ refresh_url|tojson if refresh_url else 'null' }},
+        })"
+        hx-preserve
+        class="combo-box-widget">
+        <div class="input-group">
+            <input type="text"
+                id="{{ id }}-input"
+                x-model.trim="query"
+                @keydown.enter.prevent="submitAddOrEdit()"
+                @keydown.escape="cancelEdit()"
+            class="form-control rounded-bottom-0">
+
+            <button id="{{ id }}-add"
+                :disabled="!query"
+                @click="submitAddOrEdit()"
+                class="btn btn-primary rounded-bottom-0">
+                <i class="bi icon-state" :class="isEditing ? 'bi-pencil' : 'bi-plus-lg'"></i>
+            </button>
+
+            <button id="{{ id }}-remove"
+                :disabled="!hasSelection"
+                @click="removeSelected()"
+                class="btn btn-danger rounded-bottom-0">
+                {{ icons.render_icon('dash-lg', 16) }}
+            </button>
+        </div>
+
+        <select id="{{ id }}-list" multiple
+            x-ref="list"
+            @change="onListChange"
+            class="form-select border-top-0 rounded-top-0"
+            name="{{ id }}" size="10">
+            {% for option in options %}
+                <option value="{{ option.id }}">{{ option.name }}</option>
+            {% endfor %}
+        </select>
+
+        {% if refresh_url %}
+        <div id="{{ id }}-htmx-refresh" class="d-none"
+            hx-get="{{ refresh_url }}"
+            hx-trigger="combobox:refresh from:#{{ id }}-container"
+            hx-target="#{{ id }}-list"
+            hx-swap="innerHTML"></div>
+        {% endif %}
+    </div>
+
+    <script>
+        function ComboBox(cfg) {
+            return {
+                id: cfg.id,
+                createUrl: cfg.createUrl,
+                editUrl: cfg.editUrl,
+                deleteUrl: cfg.deleteUrl,
+                refreshUrl: cfg.refreshUrl,
+
+                query: '',
+                isEditing: false,
+                editingOption: null,
+
+                get hasSelection() { return this.$refs.list?.selectedOptions.length > 0 },
+
+                onListChange() {
+                    const sel = this.$refs.list.selectedOptions;
+                    if (sel.length === 1) {
+                        this.query = sel[0].textContent.trim();
+                        this.isEditing = true;
+                        this.editingOption = sel[0];
+                    } else {
+                        this.cancelEdit();
+                    }
+                },
+
+                cancelEdit() { this.isEditing = false; this.editingOption = null; },
+
+                async submitAddOrEdit() {
+                    const name = (this.query || '').trim();
+                    if (!name) return;
+
+                    if (this.isEditing && this.editingOption && this.editUrl) {
+                        // EDIT
+                        const id = this.editingOption.value;
+                        await this._post(this.editUrl, { id, name });
+                        this.editingOption.textContent = name;
+                    } else if (this.createUrl) {
+                        // CREATE
+                        const data = await this._post(this.createUrl, { name });
+                        const id = (data && data.id) ? data.id : ('temp-' + Math.random().toString(36).slice(2));
+                        const opt = document.createElement('option');
+                        opt.value = id; opt.textContent = name;
+                        this.$refs.list.appendChild(opt);
+                        this._sortOptions();
+                    }
+
+                    this.query = '';
+                    this.cancelEdit();
+                    this._maybeRefresh();
+                },
+
+                async removeSelected() {
+                    const opts = Array.from(this.$refs.list.selectedOptions);
+                    if (!opts.length) return;
+
+                    if (!confirm(`Delete ${opts.length} item(s)?`)) return;
+
+                    const ids = opts.map(o => o.remove());
+
+                    this.query = '';
+                    this.cancelEdit();
+                    this._maybeRefresh();
+                },
+
+                _sortOptions() {
+                    const list = this.$refs.list;
+                    const sorted = Array.from(list.options).sort((a,b)=>a.text.localeCompare(b.text));
+                    list.innerHTML = ''; sorted.forEach(o => list.appendChild(o));
+                },
+
+                _maybeRefresh() { if (this.refreshUrl) this.$dispatch('combobox:refresh'); },
+
+                async _post(url, payload) {
+                    const res = await fetch(url, {
+                        method: 'POST',
+                        headers: {'Content-Type':'application/json'},
+                        body: JSON.stringify(payload)
+                    });
+                    if (!res.ok) {
+                        const msg = await res.text().catch(()=> 'Error');
+                    }
+                }
+            }
+        }
+    </script>
+{% endmacro %}
diff --git a/inventory/templates/layout.html b/inventory/templates/layout.html
index 92b867b..1a3ebb4 100644
--- a/inventory/templates/layout.html
+++ b/inventory/templates/layout.html
@@ -76,6 +76,8 @@
         integrity="sha384-zqgMe4cx+N3TuuqXt4kWWDluM5g1CiRwqWBm3vpvY0GcDoXTwU8d17inavaLy3p3"
         crossorigin="anonymous"></script>
     <script src="https://cdn.jsdelivr.net/npm/marked/lib/marked.umd.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/htmx.org@2.0.6/dist/htmx.min.js"></script>
+    <script defer src="https://cdn.jsdelivr.net/npm/alpinejs@3.x.x/dist/cdn.min.js"></script>
     <script src="{{ url_for('static', filename='js/combobox.js') }}"></script>
     <script src="{{ url_for('static', filename='js/csv.js') }}"></script>
     <script src="{{ url_for('static', filename='js/dropdown.js') }}"></script>
diff --git a/inventory/templates/playground.html b/inventory/templates/playground.html
new file mode 100644
index 0000000..af7322e
--- /dev/null
+++ b/inventory/templates/playground.html
@@ -0,0 +1,18 @@
+{% extends 'layout.html' %}
+
+{% block content %}
+    {{ combos.dynamic_combobox(
+        'play',
+        [
+            {
+                'id': 1,
+                'name': 'Beans'
+            },
+            {
+                'id': 2,
+                'name': 'Toast'
+            },
+        ],
+        'Breakfast!'
+    ) }}
+{% endblock %}
\ No newline at end of file