diff --git a/frontend/public/css/style.css b/frontend/public/css/style.css
index 8f76808..281c6ce 100644
--- a/frontend/public/css/style.css
+++ b/frontend/public/css/style.css
@@ -330,9 +330,60 @@ h2 { font-size: 17px; margin: 0 0 4px; }
 
 .view[hidden] { display: none; }
 
+.day-weekday-mobile { display: none; }
+
+.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
+
 @media (max-width: 720px) {
-  .main { padding: 20px 14px 50px; }
-  .day-cell { min-height: 70px; }
-  .half-day { font-size: 9px; min-height: 28px; }
+  .main { padding: 16px 12px 50px; }
   .selector-card { flex-direction: column; align-items: stretch; }
+  .topbar { padding: 10px 14px; }
+  .topbar-user { gap: 8px; }
+}
+
+/* Below this width the 7-column grid becomes unusable by touch, so the
+   calendar switches to a single-column list: one full-width row per day. */
+@media (max-width: 640px) {
+  .calendar-header { flex-direction: column; }
+  .calendar-weekdays { display: none; }
+
+  .calendar-grid {
+    display: flex;
+    flex-direction: column;
+    gap: 6px;
+  }
+  .day-cell {
+    flex-direction: row;
+    align-items: center;
+    min-height: unset;
+    padding: 10px;
+    gap: 10px;
+  }
+  .day-cell.empty { display: none; }
+  .day-number {
+    flex: 0 0 auto;
+    width: 46px;
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    line-height: 1.2;
+  }
+  .day-weekday-mobile {
+    display: block;
+    font-size: 10px;
+    font-weight: 700;
+    color: var(--color-muted);
+    text-transform: uppercase;
+  }
+  .half-day-row { gap: 8px; }
+  .half-day { min-height: 44px; font-size: 11px; }
+
+  .calendar-actions { justify-content: stretch; }
+  .calendar-actions .btn { width: 100%; }
+
+  .legend { gap: 10px 14px; font-size: 12px; }
+
+  .popover { max-width: calc(100vw - 16px); }
+
+  .modal { padding: 20px; }
 }
diff --git a/frontend/public/index.html b/frontend/public/index.html
index a2749c3..7ed86af 100644
--- a/frontend/public/index.html
+++ b/frontend/public/index.html
@@ -98,10 +98,12 @@
         <button id="add-company-btn" class="btn btn-primary">+ Nouvelle société</button>
       </div>
       <div class="card">
-        <table class="data-table">
-          <thead><tr><th>Nom</th><th>Cadres actifs</th><th>Créée le</th><th></th></tr></thead>
-          <tbody id="companies-tbody"></tbody>
-        </table>
+        <div class="table-scroll">
+          <table class="data-table">
+            <thead><tr><th>Nom</th><th>Cadres actifs</th><th>Créée le</th><th></th></tr></thead>
+            <tbody id="companies-tbody"></tbody>
+          </table>
+        </div>
       </div>
     </section>
 
@@ -117,10 +119,12 @@
             <select id="users-filter-company"><option value="">Toutes</option></select>
           </label>
         </div>
-        <table class="data-table">
-          <thead><tr><th>Nom</th><th>E-mail</th><th>Rôle</th><th>Société</th><th>Statut</th><th></th></tr></thead>
-          <tbody id="users-tbody"></tbody>
-        </table>
+        <div class="table-scroll">
+          <table class="data-table">
+            <thead><tr><th>Nom</th><th>E-mail</th><th>Rôle</th><th>Société</th><th>Statut</th><th></th></tr></thead>
+            <tbody id="users-tbody"></tbody>
+          </table>
+        </div>
       </div>
     </section>
 
@@ -165,10 +169,12 @@
             <button id="reopen-company-btn" class="btn btn-outline">Réouvrir</button>
           </div>
         </div>
-        <table class="data-table">
-          <thead><tr><th>Cadre</th><th>Statut</th><th>Validé le</th><th></th></tr></thead>
-          <tbody id="validation-cadres-tbody"></tbody>
-        </table>
+        <div class="table-scroll">
+          <table class="data-table">
+            <thead><tr><th>Cadre</th><th>Statut</th><th>Validé le</th><th></th></tr></thead>
+            <tbody id="validation-cadres-tbody"></tbody>
+          </table>
+        </div>
         <div class="export-row">
           <span>Export :</span>
           <button id="export-pdf-btn" class="btn btn-outline">Télécharger PDF</button>
diff --git a/frontend/public/js/app.js b/frontend/public/js/app.js
index 1d8343c..917dd18 100644
--- a/frontend/public/js/app.js
+++ b/frontend/public/js/app.js
@@ -1,6 +1,7 @@
 (() => {
   'use strict';
 
+  const WEEKDAY_SHORT = ['Dim', 'Lun', 'Mar', 'Mer', 'Jeu', 'Ven', 'Sam'];
   const MONTH_NAMES = [
     'Janvier', 'Février', 'Mars', 'Avril', 'Mai', 'Juin',
     'Juillet', 'Août', 'Septembre', 'Octobre', 'Novembre', 'Décembre',
@@ -224,7 +225,7 @@
 
       const num = document.createElement('div');
       num.className = 'day-number';
-      num.textContent = d;
+      num.innerHTML = `<span class="day-weekday-mobile">${WEEKDAY_SHORT[dateObj.getDay()]}</span> ${d}`;
       cell.appendChild(num);
 
       const row = document.createElement('div');
@@ -258,10 +259,24 @@
     popoverTarget = half;
     const label = half.dataset.period === 'AM' ? 'Matin' : 'Après-midi';
     document.getElementById('popover-title').textContent = `${half.dataset.date} — ${label}`;
-    const rect = half.getBoundingClientRect();
-    popover.style.top = `${window.scrollY + rect.bottom + 6}px`;
-    popover.style.left = `${window.scrollX + rect.left}px`;
+
     popover.hidden = false;
+    const rect = half.getBoundingClientRect();
+    const popRect = popover.getBoundingClientRect();
+    const viewportWidth = document.documentElement.clientWidth;
+    const viewportHeight = document.documentElement.clientHeight;
+    const margin = 8;
+
+    let top = window.scrollY + rect.bottom + 6;
+    if (rect.bottom + popRect.height + margin > viewportHeight) {
+      top = window.scrollY + rect.top - popRect.height - 6;
+    }
+    let left = window.scrollX + rect.left;
+    const maxLeft = window.scrollX + viewportWidth - popRect.width - margin;
+    left = Math.min(left, Math.max(window.scrollX + margin, maxLeft));
+
+    popover.style.top = `${Math.max(window.scrollY + margin, top)}px`;
+    popover.style.left = `${left}px`;
   });
 
   document.addEventListener('click', (e) => {