diff --git a/static/style.css b/static/style.css
index ce06ad1e..9bd2ad87 100644
--- a/static/style.css
+++ b/static/style.css
@@ -284,23 +284,15 @@ body.builderBody > main.content{ flex:1 1 auto; min-height:0; overflow:hidden; d
 .containerContentGroup{ border-color:#3d6b3d; background:#152015; }
 .containerContentGroup > summary{ color:#8fd98f; }
 
-.posGrid{ display:grid; grid-template-columns:1fr 1fr; gap:8px 12px; margin-bottom:14px; }
-.posGrid label{ font-size:11px; color:var(--text-dim); display:flex; flex-direction:column; gap:4px; }
-.posGrid input{ background:var(--panel2); border:1px solid var(--border); border-radius:6px; color:var(--text); padding:6px 8px; }
+/* .posGrid/.controlRow/.sizeField/.sliderRow/.alignGroup : Bulma fournit
+   déjà la mise en page (columns/field/control/buttons has-addons, voir
+   screen_edit.html) — ce qui reste ici n'est que ce que Bulma ne fournit
+   pas nativement : l'espacement propre à un curseur (slider) et son
+   pastille de valeur affichée à côté. */
 .posGrid input:disabled{ opacity:0.4; cursor:not-allowed; }
-.sizeField{ display:flex; gap:4px; }
-.sizeField input{ flex:1; min-width:0; }
-.sizeField select{ width:auto; flex:0 0 auto; padding:6px 4px; }
-
-.controlRow{ margin-bottom:12px; }
-.controlRow > label{ display:block; font-size:12px; color:var(--text-dim); margin-bottom:4px; }
 .sliderRow{ display:flex; align-items:center; gap:10px; }
 .sliderRow input[type=range]{ flex:1; }
-.sliderValue{ font-size:12px; color:var(--text-dim); min-width:44px; text-align:right; }
-.alignGroup{ display:flex; gap:6px; }
-.alignOption{ flex:1; text-align:center; padding:8px 0; border:1px solid var(--border); border-radius:6px; cursor:pointer; }
-.alignOption input{ display:none; }
-.alignOption.active{ border-color:var(--accent); background:rgba(91,140,255,.15); }
+.sliderValue{ min-width:44px; text-align:right; }
 input[type=color]{ width:52px; height:34px; padding:2px; }
 
 .propsPanel .sectionDivider, .builderPanelRight .sectionDivider{ border:none; border-top:1px solid var(--border); margin:14px 0; }
diff --git a/templates/screen_edit.html b/templates/screen_edit.html
index 9bb705f6..260bbc6c 100644
--- a/templates/screen_edit.html
+++ b/templates/screen_edit.html
@@ -151,19 +151,19 @@
       {% if el %}
       {% set w = widgets.get(el.widget, {}) %}
       <div class="fieldRow" style="align-items:center; justify-content:space-between;">
-        <h2 style="margin:0;">{{ w.get('icon','❔') }} {{ el|elabel }}{% if el.name %} <span class="hint">— {{ w.get('label', el.widget) }}</span>{% endif %}</h2>
+        <h2 class="subtitle is-6" style="margin:0;">{{ w.get('icon','❔') }} {{ el|elabel }}{% if el.name %} <span class="has-text-grey">— {{ w.get('label', el.widget) }}</span>{% endif %}</h2>
         <form method="post" action="{{ url_for('element_delete', slug=game.slug, element_id=el.id) }}"
               onsubmit="return confirm('Supprimer cet élément ?');">
-          <button type="submit" class="smallBtn button is-small is-danger">🗑️</button>
+          <button type="submit" class="button is-small is-danger">🗑️</button>
         </form>
       </div>
-      <form method="post" action="{{ url_for('element_rename', slug=game.slug, element_id=el.id) }}" class="fieldRow" style="align-items:center; margin:6px 0;">
-        <input type="text" name="name" value="{{ el.name or '' }}" placeholder="Donne un nom à cet élément" style="flex:1;">
-        <button type="submit" class="smallBtn button is-small">Nommer</button>
+      <form method="post" action="{{ url_for('element_rename', slug=game.slug, element_id=el.id) }}" class="field has-addons" style="margin:6px 0;">
+        <div class="control is-expanded"><input class="input" type="text" name="name" value="{{ el.name or '' }}" placeholder="Donne un nom à cet élément"></div>
+        <div class="control"><button type="submit" class="button is-small">Nommer</button></div>
       </form>
-      <div class="fieldRow" style="align-items:center; margin:6px 0;">
-        <label style="width:auto; margin-right:6px;">ID</label>
-        <input type="text" value="elt-{{ el.id }}" readonly style="flex:1; opacity:0.7;">
+      <div class="field has-addons" style="margin:6px 0;">
+        <div class="control"><a class="button is-small is-static">ID</a></div>
+        <div class="control is-expanded"><input class="input" type="text" value="elt-{{ el.id }}" readonly style="opacity:0.7;"></div>
       </div>
 
       {% if el.widget in container_widgets %}
@@ -191,27 +191,27 @@
         <summary>🗂️ Onglets{{ ' (' ~ tabs|length ~ ')' if tabs else '' }}</summary>
         <div class="propGroupBody">
       {% if tabs %}
-      <div class="list">
-        {% for tab in tabs %}
-        <div class="listRow" style="display:flex; flex-direction:column; gap:6px;">
-          <form method="post" action="{{ url_for('element_rename', slug=game.slug, element_id=tab.id) }}" class="fieldRow" style="align-items:center; margin:0;">
-            <input type="text" name="name" value="{{ tab.name or ('Onglet ' ~ loop.index) }}" placeholder="Nom de l'onglet" style="flex:1;">
-            <button type="submit" class="smallBtn button is-small">Renommer</button>
-          </form>
-          <div class="fieldRow" style="align-items:center; margin:0;">
-            <a class="smallBtn button is-small" style="flex:1; text-align:center;" href="{{ url_for('screen_edit', slug=game.slug, screen_id=screen.id, selected=tab.id) }}">📥 Contenu de l'onglet</a>
+      {% for tab in tabs %}
+      <div class="box" style="padding:10px; display:flex; flex-direction:column; gap:6px;">
+        <form method="post" action="{{ url_for('element_rename', slug=game.slug, element_id=tab.id) }}" class="field has-addons" style="margin:0;">
+          <div class="control is-expanded"><input class="input is-small" type="text" name="name" value="{{ tab.name or ('Onglet ' ~ loop.index) }}" placeholder="Nom de l'onglet"></div>
+          <div class="control"><button type="submit" class="button is-small">Renommer</button></div>
+        </form>
+        <div class="field has-addons" style="margin:0;">
+          <div class="control is-expanded"><a class="button is-small is-fullwidth" href="{{ url_for('screen_edit', slug=game.slug, screen_id=screen.id, selected=tab.id) }}">📥 Contenu de l'onglet</a></div>
+          <div class="control">
             <form method="post" action="{{ url_for('element_delete', slug=game.slug, element_id=tab.id) }}" onsubmit="return confirm('Supprimer cet onglet et tout son contenu ?');">
-              <button type="submit" class="smallBtn button is-small is-danger">🗑️</button>
+              <button type="submit" class="button is-small is-danger">🗑️</button>
             </form>
           </div>
         </div>
-        {% endfor %}
       </div>
+      {% endfor %}
       {% else %}
-      <p class="hint">Aucun onglet pour l'instant.</p>
+      <p class="help">Aucun onglet pour l'instant.</p>
       {% endif %}
       <form method="post" action="{{ url_for('element_tab_add', slug=game.slug, element_id=el.id) }}" style="margin-top:8px;">
-        <button type="submit" class="smallBtn button is-small is-primary" style="width:100%;">➕ Ajouter un onglet</button>
+        <button type="submit" class="button is-small is-primary is-fullwidth">➕ Ajouter un onglet</button>
       </form>
         </div>
       </details>
@@ -225,35 +225,63 @@
       <details class="propGroup">
         <summary>Position &amp; taille</summary>
         <div class="propGroupBody">
-      <div class="posGrid">
-        <label>X (%)<input type="number" id="pos-x" min="0" max="100" value="{{ el.x }}" {{ 'disabled' if el.parent_id else '' }}></label>
-        <label>Y (%)<input type="number" id="pos-y" min="0" max="100" value="{{ el.y }}" {{ 'disabled' if el.parent_id else '' }}></label>
+      <div class="columns is-multiline posGrid">
+        <div class="column is-half">
+          <div class="field"><label class="label is-small">X (%)</label>
+            <div class="control"><input class="input is-small" type="number" id="pos-x" min="0" max="100" value="{{ el.x }}" {{ 'disabled' if el.parent_id else '' }}></div>
+          </div>
+        </div>
+        <div class="column is-half">
+          <div class="field"><label class="label is-small">Y (%)</label>
+            <div class="control"><input class="input is-small" type="number" id="pos-y" min="0" max="100" value="{{ el.y }}" {{ 'disabled' if el.parent_id else '' }}></div>
+          </div>
+        </div>
         {% if el.parent_id %}
-        <label>Largeur
-          <div class="sizeField">
-            <input type="number" name="ctrl_child-width_value" min="0" value="{{ size_ctrls['child-width'].value.value or '' }}" placeholder="auto">
-            <select name="ctrl_child-width_unit">
-              <option value="%" {{ 'selected' if size_ctrls['child-width'].value.unit == '%' else '' }}>%</option>
-              <option value="px" {{ 'selected' if size_ctrls['child-width'].value.unit == 'px' else '' }}>px</option>
-            </select>
+        <div class="column is-half">
+          <div class="field"><label class="label is-small">Largeur</label>
+            <div class="field has-addons sizeField">
+              <div class="control is-expanded"><input class="input is-small" type="number" name="ctrl_child-width_value" min="0" value="{{ size_ctrls['child-width'].value.value or '' }}" placeholder="auto"></div>
+              <div class="control">
+                <div class="select is-small">
+                  <select name="ctrl_child-width_unit">
+                    <option value="%" {{ 'selected' if size_ctrls['child-width'].value.unit == '%' else '' }}>%</option>
+                    <option value="px" {{ 'selected' if size_ctrls['child-width'].value.unit == 'px' else '' }}>px</option>
+                  </select>
+                </div>
+              </div>
+            </div>
           </div>
-        </label>
-        <label>Hauteur
-          <div class="sizeField">
-            <input type="number" name="ctrl_child-height_value" min="0" value="{{ size_ctrls['child-height'].value.value or '' }}" placeholder="auto">
-            <select name="ctrl_child-height_unit">
-              <option value="%" {{ 'selected' if size_ctrls['child-height'].value.unit == '%' else '' }}>%</option>
-              <option value="px" {{ 'selected' if size_ctrls['child-height'].value.unit == 'px' else '' }}>px</option>
-            </select>
+        </div>
+        <div class="column is-half">
+          <div class="field"><label class="label is-small">Hauteur</label>
+            <div class="field has-addons sizeField">
+              <div class="control is-expanded"><input class="input is-small" type="number" name="ctrl_child-height_value" min="0" value="{{ size_ctrls['child-height'].value.value or '' }}" placeholder="auto"></div>
+              <div class="control">
+                <div class="select is-small">
+                  <select name="ctrl_child-height_unit">
+                    <option value="%" {{ 'selected' if size_ctrls['child-height'].value.unit == '%' else '' }}>%</option>
+                    <option value="px" {{ 'selected' if size_ctrls['child-height'].value.unit == 'px' else '' }}>px</option>
+                  </select>
+                </div>
+              </div>
+            </div>
           </div>
-        </label>
+        </div>
         {% else %}
-        <label>Largeur (%)<input type="number" id="pos-w" min="1" max="100" value="{{ el.width }}"></label>
-        <label>Hauteur (%)<input type="number" id="pos-h" min="1" max="100" value="{{ el.height }}"></label>
+        <div class="column is-half">
+          <div class="field"><label class="label is-small">Largeur (%)</label>
+            <div class="control"><input class="input is-small" type="number" id="pos-w" min="1" max="100" value="{{ el.width }}"></div>
+          </div>
+        </div>
+        <div class="column is-half">
+          <div class="field"><label class="label is-small">Hauteur (%)</label>
+            <div class="control"><input class="input is-small" type="number" id="pos-h" min="1" max="100" value="{{ el.height }}"></div>
+          </div>
+        </div>
         {% endif %}
       </div>
       {% if el.parent_id %}
-      <p class="hint">X/Y ne s'appliquent qu'à un élément posé directement sur l'écran — celui-ci suit la disposition de son conteneur. Largeur/Hauteur : laisser vide garde la taille automatique ; "%" (relatif au conteneur) convient à la plupart des cas, "px" pour une taille précise.</p>
+      <p class="help">X/Y ne s'appliquent qu'à un élément posé directement sur l'écran — celui-ci suit la disposition de son conteneur. Largeur/Hauteur : laisser vide garde la taille automatique ; "%" (relatif au conteneur) convient à la plupart des cas, "px" pour une taille précise.</p>
       {% endif %}
         </div>
       </details>
@@ -271,50 +299,65 @@
         {% set ns.last_group = c.group %}
         {% set ns.started = True %}
         {% endif %}
-        <div class="controlRow">
-          <label>{{ c.label }}</label>
-          {% if c.type in ('text', 'url') %}
-          <input type="text" name="ctrl_{{ c.key }}" value="{{ c.value }}" placeholder="{{ c.placeholder or '' }}" class="{{ 'uploadTextField' if c.allow_upload else '' }}" id="field-{{ c.key }}">
-          {% if c.allow_upload %}
-          <div class="uploadRow">
-            <input type="file" class="uploadInput" accept="{{ c.upload_accept }}" data-target="field-{{ c.key }}">
-            <span class="hint uploadStatus"></span>
+        <div class="field controlRow">
+          {% if c.type in ('checkbox', 'toggle_token') %}
+          <div class="control">
+            <label class="checkbox">
+              <input type="checkbox" name="ctrl_{{ c.key }}" {{ 'checked' if c.value else '' }}>
+              {{ c.label }}
+            </label>
           </div>
-          <p class="hint">Colle une adresse (URL) ci-dessus, ou choisis un fichier sur ton ordinateur — il sera hébergé automatiquement avec ce jeu.</p>
+          {% else %}
+          <label class="label is-small">{{ c.label }}</label>
+          {% if c.type in ('text', 'url') %}
+          <div class="control">
+            <input class="input {{ 'uploadTextField' if c.allow_upload else '' }}" type="text" name="ctrl_{{ c.key }}" value="{{ c.value }}" placeholder="{{ c.placeholder or '' }}" id="field-{{ c.key }}">
+          </div>
+          {% if c.allow_upload %}
+          <div class="control uploadRow">
+            <input type="file" class="uploadInput" accept="{{ c.upload_accept }}" data-target="field-{{ c.key }}">
+            <span class="help uploadStatus"></span>
+          </div>
+          <p class="help">Colle une adresse (URL) ci-dessus, ou choisis un fichier sur ton ordinateur — il sera hébergé automatiquement avec ce jeu.</p>
           {% endif %}
           {% elif c.type == 'textarea' %}
-          <textarea name="ctrl_{{ c.key }}" rows="4" placeholder="{{ c.placeholder or '' }}">{{ c.value }}</textarea>
+          <div class="control"><textarea class="textarea" name="ctrl_{{ c.key }}" rows="4" placeholder="{{ c.placeholder or '' }}">{{ c.value }}</textarea></div>
           {% elif c.type == 'color' %}
-          <input type="color" name="ctrl_{{ c.key }}" value="{{ c.value or c.default }}">
+          <div class="control"><input class="input" type="color" name="ctrl_{{ c.key }}" value="{{ c.value or c.default }}"></div>
           {% elif c.type == 'slider' %}
-          <div class="sliderRow">
+          <div class="control sliderRow">
             <input type="range" name="ctrl_{{ c.key }}" min="{{ c.min }}" max="{{ c.max }}" step="{{ c.step }}" value="{{ c.value }}"
                    oninput="this.nextElementSibling.textContent = this.value + '{{ c.unit }}'">
-            <span class="sliderValue">{{ c.value }}{{ c.unit }}</span>
+            <span class="sliderValue tag">{{ c.value }}{{ c.unit }}</span>
           </div>
           {% elif c.type == 'scale' %}
-          <div class="sliderRow">
+          <div class="control sliderRow">
             <input type="range" name="ctrl_{{ c.key }}" min="{{ c.min }}" max="{{ c.max }}" step="{{ c.step }}" value="{{ c.value }}"
                    oninput="this.nextElementSibling.textContent = 'x' + this.value">
-            <span class="sliderValue">x{{ c.value }}</span>
+            <span class="sliderValue tag">x{{ c.value }}</span>
           </div>
-          {% elif c.type in ('checkbox', 'toggle_token') %}
-          <input type="checkbox" name="ctrl_{{ c.key }}" {{ 'checked' if c.value else '' }}>
           {% elif c.type == 'align' %}
-          <div class="alignGroup">
-            {% for val, icon in [('left','⬅️'),('center','⬛'),('right','➡️'),('justify','☰')] %}
-            <label class="alignOption {{ 'active' if c.value == val else '' }}">
-              <input type="radio" name="ctrl_{{ c.key }}" value="{{ val }}" {{ 'checked' if c.value == val else '' }} onchange="syncAlign(this)">
-              {{ icon }}
-            </label>
-            {% endfor %}
+          <div class="control">
+            <div class="buttons has-addons alignGroup">
+              {% for val, icon in [('left','⬅️'),('center','⬛'),('right','➡️'),('justify','☰')] %}
+              <label class="button is-small alignOption {{ 'is-primary active' if c.value == val else '' }}">
+                <input type="radio" name="ctrl_{{ c.key }}" value="{{ val }}" {{ 'checked' if c.value == val else '' }} onchange="syncAlign(this)" style="display:none;">
+                {{ icon }}
+              </label>
+              {% endfor %}
+            </div>
           </div>
           {% elif c.type in ('select', 'preset') %}
-          <select name="ctrl_{{ c.key }}" id="field-{{ c.key }}">
-            {% for opt in c.options %}
-            <option value="{{ opt[0] }}" {{ 'selected' if c.value == opt[0] else '' }}>{{ opt[1] }}</option>
-            {% endfor %}
-          </select>
+          <div class="control">
+            <div class="select is-fullwidth">
+              <select name="ctrl_{{ c.key }}" id="field-{{ c.key }}">
+                {% for opt in c.options %}
+                <option value="{{ opt[0] }}" {{ 'selected' if c.value == opt[0] else '' }}>{{ opt[1] }}</option>
+                {% endfor %}
+              </select>
+            </div>
+          </div>
+          {% endif %}
           {% endif %}
         </div>
         {% endfor %}
@@ -1178,8 +1221,8 @@ function onDataDefinitionChange(sel) {
 document.querySelectorAll('.targetDefinitionSelect').forEach(onDataDefinitionChange);
 
 function syncAlign(radio) {
-  radio.closest('.alignGroup').querySelectorAll('.alignOption').forEach(function(o){ o.classList.remove('active'); });
-  radio.closest('.alignOption').classList.add('active');
+  radio.closest('.alignGroup').querySelectorAll('.alignOption').forEach(function(o){ o.classList.remove('active', 'is-primary'); });
+  radio.closest('.alignOption').classList.add('active', 'is-primary');
 }
 
 // Choix du format d'aperçu (Portrait/Paysage/Carré) : mémorisé côté serveur