diff --git a/atlas/templates/atlas/case_display_block.html b/atlas/templates/atlas/case_display_block.html
index 5e55e7fd..617c8fd5 100755
--- a/atlas/templates/atlas/case_display_block.html
+++ b/atlas/templates/atlas/case_display_block.html
@@ -104,6 +104,17 @@
     }
     .quick-edit-wrap .quick-edit-button:hover { opacity: 1; }
 
+    @media (max-width: 767.98px) {
+        .quick-edit-wrap .quick-edit-button,
+        .case-meta-item .quick-edit-button,
+        .case-inline-field .quick-edit-compact {
+            opacity: 0.95;
+            pointer-events: auto;
+            padding: 0.15rem 0.35rem;
+            font-size: 0.9rem;
+        }
+    }
+
     /* Metadata-specific quick-edit: ensure edit button overlays without moving badges */
     .case-meta-item { position: relative; }
     .case-meta-item .quick-edit-button {
diff --git a/atlas/templates/atlas/collection_case_displaysetup.html b/atlas/templates/atlas/collection_case_displaysetup.html
index b2a20b99..b1e99433 100644
--- a/atlas/templates/atlas/collection_case_displaysetup.html
+++ b/atlas/templates/atlas/collection_case_displaysetup.html
@@ -6,8 +6,7 @@
     {% include 'atlas/partials/_viewing_case_as_part_of_collection.html' with nav_link_view="atlas:collection_case_displaysetup" %}
     <h2>Setup default display for case</h2>
 
-    <div id="root" class="dicom-viewer-root" data-images="{{casedetail.case.get_series_images_nested}}"
-         style="box-sizing: border-box; background: #222; width: 100vw; height: 800px; max-width: 1600px;"
+    <div id="root" class="dicom-viewer-root viewer-frame-setup" data-images="{{casedetail.case.get_series_images_nested}}"
          data-auto-cache-stack="true"
          {% if casedetail.default_viewerstate %}
              data-viewerstate={{ casedetail.default_viewerstate }}
diff --git a/atlas/templates/atlas/collection_case_view_take.html b/atlas/templates/atlas/collection_case_view_take.html
index 0628855a..90118321 100644
--- a/atlas/templates/atlas/collection_case_view_take.html
+++ b/atlas/templates/atlas/collection_case_view_take.html
@@ -40,8 +40,8 @@
         <div id="question-timer-block" class="mb-3" title="This case has a view time limit of {{ effective_question_time_limit }} seconds.">
             <div class="d-flex align-items-center gap-3">
                 <div><strong>Case view:</strong> <span id="question-timer" aria-live="polite">&nbsp;</span></div>
-                <div style="flex:1; max-width:320px;">
-                    <div class="progress" style="height:10px;">
+                <div class="flex-max-320">
+                    <div class="progress progress-compact-sm">
                         <div id="question-timer-progress-inner" class="progress-bar" role="progressbar" style="width:100%; background:var(--timer-color, #28a745);"></div>
                     </div>
                 </div>
@@ -105,9 +105,9 @@
             <div>
 
                 {% if question_completed %}
-                    <iframe id="viewer" style="width: 100%; height: 100%; border: none; padding: 0px; min-height: 700px" src="/ohif/viewer/dicomjson?url=https://www.penracourses.org.uk{% if case_number %}{% url 'atlas:collection_case_dicom_json_review' collection.pk case_number %}{% else %}{% url 'atlas:collection_case_dicom_json_review_legacy' collection.pk case.pk %}{% endif %}"></iframe>
+                    <iframe id="viewer" class="viewer-frame-ohif" src="/ohif/viewer/dicomjson?url=https://www.penracourses.org.uk{% if case_number %}{% url 'atlas:collection_case_dicom_json_review' collection.pk case_number %}{% else %}{% url 'atlas:collection_case_dicom_json_review_legacy' collection.pk case.pk %}{% endif %}"></iframe>
                 {% else %}
-                    <iframe id="viewer" style="width: 100%; height: 100%; border: none; padding: 0px; min-height: 700px" src="/ohif/viewer/dicomjson?url=https://www.penracourses.org.uk{% if case_number %}{% url 'atlas:collection_case_dicom_json' collection.pk case_number %}{% else %}{% url 'atlas:collection_case_dicom_json_legacy' collection.pk case.pk %}{% endif %}"></iframe>
+                    <iframe id="viewer" class="viewer-frame-ohif" src="/ohif/viewer/dicomjson?url=https://www.penracourses.org.uk{% if case_number %}{% url 'atlas:collection_case_dicom_json' collection.pk case_number %}{% else %}{% url 'atlas:collection_case_dicom_json_legacy' collection.pk case.pk %}{% endif %}"></iframe>
                 {% endif %}
 
             </div>
@@ -128,8 +128,7 @@
 
             <details id="dicom-viewer-details" open>
                 <summary>Viewer</summary>
-                <div id="main_viewer" class="dicom-viewer-root"
-                     style="box-sizing: border-box; background: #222; width: 100%; height: 600px;"
+                 <div id="main_viewer" class="dicom-viewer-root viewer-frame-standard"
                      data-auto-cache-stack="false"
                      data-named-stacks='{{casedetail.get_case_named_stacks}}'
                 ></div>
diff --git a/atlas/templates/atlas/collection_feedback_overview.html b/atlas/templates/atlas/collection_feedback_overview.html
index 3b714b52..dd75d3cf 100644
--- a/atlas/templates/atlas/collection_feedback_overview.html
+++ b/atlas/templates/atlas/collection_feedback_overview.html
@@ -12,7 +12,7 @@
                 {% endif %}
             </div>
         </div>
-        <div class="card border-secondary" style="min-width: 320px;">
+        <div class="card border-secondary summary-card">
             <div class="card-body py-2 px-3">
                 <div class="small text-muted">Feedback Summary</div>
                 <div class="fw-semibold">{{ total_outstanding_feedback }} outstanding feedback item{{ total_outstanding_feedback|pluralize }}</div>
diff --git a/atlas/templates/atlas/collection_history_user.html b/atlas/templates/atlas/collection_history_user.html
index 56d8da68..a744183e 100644
--- a/atlas/templates/atlas/collection_history_user.html
+++ b/atlas/templates/atlas/collection_history_user.html
@@ -6,11 +6,11 @@
             <h2 class="h4 mb-1">{{ collection.name }}</h2>
             <div class="text-muted small">Learner: <strong>{{ user }}</strong></div>
         </div>
-        <div class="card border-secondary" style="min-width: 320px;">
+        <div class="card border-secondary summary-card">
             <div class="card-body py-2 px-3">
                 <div class="small text-muted">Attempt Progress</div>
                 <div class="fw-semibold">{{ answer_count }} / {{ collection_length }} answered</div>
-                <div class="progress mt-2" style="height: 8px;">
+                <div class="progress progress-compact mt-2">
                     <div class="progress-bar" role="progressbar" style="width: {% widthratio answer_count collection_length 100 %}%"></div>
                 </div>
                 <div class="mt-2 small">Started: {{ cid_user_exam.start_time }}</div>
diff --git a/atlas/templates/atlas/collection_take_overview.html b/atlas/templates/atlas/collection_take_overview.html
index a36feac4..9d1a82a7 100644
--- a/atlas/templates/atlas/collection_take_overview.html
+++ b/atlas/templates/atlas/collection_take_overview.html
@@ -20,12 +20,12 @@
                 {% endif %}
             </div>
         </div>
-        <div class="card border-secondary" style="min-width: 280px;">
+        <div class="card border-secondary summary-card">
             <div class="card-body py-2 px-3">
                 <div class="small text-muted">Progress</div>
                 {% if not collection.review_only %}
                     <div class="fw-semibold">{{ answer_count }} / {{ collection_length }} answered</div>
-                    <div class="progress mt-2" style="height: 8px;">
+                    <div class="progress progress-compact mt-2">
                         <div class="progress-bar" role="progressbar" style="width: {% widthratio answer_count collection_length 100 %}%"></div>
                     </div>
                 {% else %}
diff --git a/atlas/templates/atlas/collection_user_messages.html b/atlas/templates/atlas/collection_user_messages.html
index cf083cf3..c528a4b1 100644
--- a/atlas/templates/atlas/collection_user_messages.html
+++ b/atlas/templates/atlas/collection_user_messages.html
@@ -6,7 +6,7 @@
             <h2 class="h4 mb-1">{{ collection.name }}</h2>
             <div class="text-muted small">Message hub for <strong>{{ target_label }}</strong></div>
         </div>
-        <div class="card border-secondary" style="min-width: 320px;">
+        <div class="card border-secondary summary-card">
             <div class="card-body py-2 px-3">
                 <div class="small text-muted">Outstanding messages</div>
                 <div class="fw-semibold {% if total_outstanding_messages %}text-danger{% endif %}">
diff --git a/atlas/templates/atlas/new_uploads.html b/atlas/templates/atlas/new_uploads.html
index 19488684..d959caf4 100644
--- a/atlas/templates/atlas/new_uploads.html
+++ b/atlas/templates/atlas/new_uploads.html
@@ -103,8 +103,8 @@
                 <small id="viewer-context" class="text-muted">No study/series selected</small>
             </div>
         </div>
-        <div class="card-body" style="position: relative; min-height: 450px;">
-            <div id="uploadviewer" class="dicom-viewer-root" style="position: absolute; top: 0; left: 0; right: 0; bottom: 0; width: 100%; height: 100%;"></div>
+        <div class="card-body viewer-preupload-shell">
+            <div id="uploadviewer" class="dicom-viewer-root viewer-preupload-root"></div>
         </div>
     </div>
 
diff --git a/atlas/templates/atlas/series_viewer.html b/atlas/templates/atlas/series_viewer.html
index 3b7d1d66..54202afa 100755
--- a/atlas/templates/atlas/series_viewer.html
+++ b/atlas/templates/atlas/series_viewer.html
@@ -30,8 +30,7 @@
                 <div class="card">
                     <div class="card-body p-2">
                         {% with image_url_array_and_count=series.get_image_url_array_and_count %}
-                            <div id="root" class="dicom-viewer-root w-100" data-images="{{ image_url_array_and_count.0 }}"
-                                 style="height: 600px; box-sizing: border-box; background: #222;" data-auto-cache-stack=false>
+                               <div id="root" class="dicom-viewer-root w-100 viewer-frame-standard" data-images="{{ image_url_array_and_count.0 }}" data-auto-cache-stack=false>
                             </div>
                         {% endwith %}
                     </div>
@@ -242,13 +241,13 @@
 
 
     <div id="clone-findings-modal" class="modal modal-blur fade" tabindex="-1">
-        <div class="modal-dialog modal-dialog-centered related-finding-modal" style="max-width: 700px;">
+        <div class="modal-dialog modal-dialog-centered related-finding-modal modal-wide-md">
             <div class="modal-content"></div>
         </div>
     </div>
 
     <div id="series-tag-consistency-modal" class="modal modal-blur fade" tabindex="-1">
-        <div class="modal-dialog modal-dialog-centered modal-xl" style="max-width: 1200px;">
+        <div class="modal-dialog modal-dialog-centered modal-xl modal-wide-xl">
             <div class="modal-content"></div>
         </div>
     </div>
diff --git a/atlas/templates/atlas/user_messages_inbox.html b/atlas/templates/atlas/user_messages_inbox.html
index 3e743bd0..7d1bd3fc 100644
--- a/atlas/templates/atlas/user_messages_inbox.html
+++ b/atlas/templates/atlas/user_messages_inbox.html
@@ -6,7 +6,7 @@
             <h2 class="h4 mb-1">Messages Inbox</h2>
             <div class="text-muted small">All accessible conversation threads across collections.</div>
         </div>
-        <div class="card border-secondary" style="min-width: 320px;">
+        <div class="card border-secondary summary-card">
             <div class="card-body py-2 px-3">
                 <div class="small text-muted">Pending acknowledgements</div>
                 <div class="fw-semibold {% if total_needs_your_ack %}text-danger{% endif %}">
diff --git a/generic/templates/generic/trainees_bulk_update.html b/generic/templates/generic/trainees_bulk_update.html
index 28de2c95..b1eaea8b 100644
--- a/generic/templates/generic/trainees_bulk_update.html
+++ b/generic/templates/generic/trainees_bulk_update.html
@@ -7,7 +7,7 @@
 
         <form method="post">
             {% csrf_token %}
-            <textarea name="data" rows="18" style="width:100%">{% if request.POST.data %}{{ request.POST.data }}{% endif %}</textarea>
+            <textarea name="data" rows="18" class="w-100">{% if request.POST.data %}{{ request.POST.data }}{% endif %}</textarea>
             <div style="margin-top:8px">
                 <button type="submit" name="action" value="preview" class="btn btn-primary">Preview</button>
                 <button type="submit" name="action" value="apply" class="btn btn-danger" onclick="return confirm('This will apply updates to matched trainee profiles. Are you sure?')">Apply updates</button>
@@ -40,9 +40,9 @@
                                     <div>
                                         <span style="color:red">No match</span>
                                         <div>
-                                            <div class="d-inline-flex align-items-center" style="gap:6px">
-                                                <form hx-get="{% url 'generic:user_search' %}" hx-target="#user-results-{{ r.row_index }}" hx-swap="innerHTML" onsubmit="return false;" class="d-inline-flex align-items-center">
-                                                    <input type="text" name="q" id="user-search-input-{{ r.row_index }}" placeholder="Search users..." style="width:220px" />
+                                            <div class="inline-search-row">
+                                                <form hx-get="{% url 'generic:user_search' %}" hx-target="#user-results-{{ r.row_index }}" hx-swap="innerHTML" onsubmit="return false;" class="inline-search-row">
+                                                    <input type="text" name="q" id="user-search-input-{{ r.row_index }}" class="form-control form-control-sm search-input-compact" placeholder="Search users..." />
                                                     <input type="hidden" name="row" value="{{ r.row_index }}" />
                                                     <button type="submit" class="btn btn-sm btn-secondary">Search</button>
                                                 </form>
@@ -59,9 +59,9 @@
                                 {% else %}
                                     <div>
                                         <span style="color:red">No match</span>
-                                        <div class="d-inline-flex align-items-center" style="gap:6px">
-                                            <form hx-get="{% url 'generic:supervisor_search' %}" hx-target="#supervisor-results-{{ r.row_index }}" hx-swap="innerHTML" onsubmit="return false;" class="d-inline-flex align-items-center">
-                                                <input type="text" name="q" id="supervisor-search-input-{{ r.row_index }}" placeholder="Search supervisors..." style="width:220px" />
+                                        <div class="inline-search-row">
+                                            <form hx-get="{% url 'generic:supervisor_search' %}" hx-target="#supervisor-results-{{ r.row_index }}" hx-swap="innerHTML" onsubmit="return false;" class="inline-search-row">
+                                                <input type="text" name="q" id="supervisor-search-input-{{ r.row_index }}" class="form-control form-control-sm search-input-compact" placeholder="Search supervisors..." />
                                                 <input type="hidden" name="row" value="{{ r.row_index }}" />
                                                 <button type="submit" class="btn btn-sm btn-secondary">Search</button>
                                             </form>
diff --git a/rad/static/css/responsive-utils.css b/rad/static/css/responsive-utils.css
new file mode 100644
index 00000000..cc5b412e
--- /dev/null
+++ b/rad/static/css/responsive-utils.css
@@ -0,0 +1,98 @@
+/* Shared responsive helpers for layout, forms, cards, and viewer surfaces. */
+
+.summary-card {
+    width: 100%;
+    max-width: 22rem;
+}
+
+@media (min-width: 576px) {
+    .summary-card {
+        width: auto;
+        min-width: 17.5rem;
+    }
+}
+
+.form-control-max-300 {
+    width: 100%;
+    max-width: 300px;
+}
+
+.form-control-max-320 {
+    width: 100%;
+    max-width: 320px;
+}
+
+.search-input-compact {
+    width: min(100%, 220px);
+}
+
+.inline-search-row {
+    display: flex;
+    align-items: center;
+    gap: 0.375rem;
+    flex-wrap: wrap;
+}
+
+.viewer-frame-setup {
+    box-sizing: border-box;
+    background: #222;
+    width: 100%;
+    max-width: 1600px;
+    height: min(72vh, 800px);
+    min-height: 420px;
+}
+
+.viewer-frame-standard {
+    box-sizing: border-box;
+    background: #222;
+    width: 100%;
+    height: min(68vh, 600px);
+    min-height: 360px;
+}
+
+.viewer-frame-ohif {
+    width: 100%;
+    height: 100%;
+    border: none;
+    padding: 0;
+    min-height: min(70vh, 700px);
+}
+
+.viewer-preupload-shell {
+    position: relative;
+    min-height: clamp(320px, 55vh, 450px);
+}
+
+.viewer-preupload-root {
+    position: absolute;
+    inset: 0;
+    width: 100%;
+    height: 100%;
+}
+
+.modal-wide-md {
+    max-width: min(700px, 96vw);
+}
+
+.modal-wide-xl {
+    max-width: min(1200px, 96vw);
+}
+
+.progress-compact {
+    height: 8px;
+}
+
+.progress-compact-sm {
+    height: 10px;
+}
+
+.flex-max-320 {
+    flex: 1;
+    max-width: 320px;
+}
+
+@media (max-width: 575.98px) {
+    .flex-max-320 {
+        max-width: 100%;
+    }
+}
diff --git a/static/css/responsive-utils.css b/static/css/responsive-utils.css
new file mode 100644
index 00000000..cc5b412e
--- /dev/null
+++ b/static/css/responsive-utils.css
@@ -0,0 +1,98 @@
+/* Shared responsive helpers for layout, forms, cards, and viewer surfaces. */
+
+.summary-card {
+    width: 100%;
+    max-width: 22rem;
+}
+
+@media (min-width: 576px) {
+    .summary-card {
+        width: auto;
+        min-width: 17.5rem;
+    }
+}
+
+.form-control-max-300 {
+    width: 100%;
+    max-width: 300px;
+}
+
+.form-control-max-320 {
+    width: 100%;
+    max-width: 320px;
+}
+
+.search-input-compact {
+    width: min(100%, 220px);
+}
+
+.inline-search-row {
+    display: flex;
+    align-items: center;
+    gap: 0.375rem;
+    flex-wrap: wrap;
+}
+
+.viewer-frame-setup {
+    box-sizing: border-box;
+    background: #222;
+    width: 100%;
+    max-width: 1600px;
+    height: min(72vh, 800px);
+    min-height: 420px;
+}
+
+.viewer-frame-standard {
+    box-sizing: border-box;
+    background: #222;
+    width: 100%;
+    height: min(68vh, 600px);
+    min-height: 360px;
+}
+
+.viewer-frame-ohif {
+    width: 100%;
+    height: 100%;
+    border: none;
+    padding: 0;
+    min-height: min(70vh, 700px);
+}
+
+.viewer-preupload-shell {
+    position: relative;
+    min-height: clamp(320px, 55vh, 450px);
+}
+
+.viewer-preupload-root {
+    position: absolute;
+    inset: 0;
+    width: 100%;
+    height: 100%;
+}
+
+.modal-wide-md {
+    max-width: min(700px, 96vw);
+}
+
+.modal-wide-xl {
+    max-width: min(1200px, 96vw);
+}
+
+.progress-compact {
+    height: 8px;
+}
+
+.progress-compact-sm {
+    height: 10px;
+}
+
+.flex-max-320 {
+    flex: 1;
+    max-width: 320px;
+}
+
+@media (max-width: 575.98px) {
+    .flex-max-320 {
+        max-width: 100%;
+    }
+}
diff --git a/templates/accounts_bulk_create.html b/templates/accounts_bulk_create.html
index 8111627e..abc2f397 100644
--- a/templates/accounts_bulk_create.html
+++ b/templates/accounts_bulk_create.html
@@ -38,13 +38,13 @@
     <p>Please note users created this way bypass some of the validations so check details such as email addresses are correct</p>
     <div class="mb-2">
         <label for="input-format" class="form-label">Input format</label>
-        <select id="input-format" class="form-select" style="width:300px">
+        <select id="input-format" class="form-select form-control-max-300">
             <option value="spreadsheet">First,Last,Email,Grade,Supervisor,SupervisorEmail (spreadsheet)</option>
             <option value="name-supervisor-email-grade">User \t Educational Supervisor \t Email \t Grade</option>
         </select>
     </div>
 
-    <textarea id="csv" placeholder="Paste users content here" style="width: 300px; height: 100px;"></textarea><br/>
+    <textarea id="csv" class="form-control form-control-max-300" rows="4" placeholder="Paste users content here"></textarea><br/>
     <input type="button" value="Load Data" _="on click createTable()" >
 
 
@@ -159,7 +159,7 @@
                 console.log(user)
                 $("#users-list").append(`<li data-index="${i}">Name: <span class="name">${user.first_name} ${user.last_name}</span><br/>Email: <span class="email">${user.email}</span><br/>Grade: <span class="grade">${user.grade}</span><br/>Supervisor: <span class="supervisor_name">${user.supervisor_name || ''}</span><br/>
                     <form>
-                    Supervisor email: <input class="supervisor-email-input" name="supervisor_email" type="text" value="${user.supervisor_email || ''}" placeholder="supervisor email" style="width: 320px; display: none;" /> <br/>
+                    Supervisor email: <input class="supervisor-email-input form-control form-control-sm form-control-max-320" name="supervisor_email" type="text" value="${user.supervisor_email || ''}" placeholder="supervisor email" style="display: none;" /> <br/>
                     <input type="text" name="first_name" value="${user.first_name}" hidden>
                     <input type="text" name="last_name" value="${user.last_name}" hidden>
                     <input type="text" name="email" value="${user.email}" hidden>
diff --git a/templates/base.html b/templates/base.html
index 1d0df9b1..d16a4570 100644
--- a/templates/base.html
+++ b/templates/base.html
@@ -79,6 +79,7 @@
         {% endblock %}
         <link rel="stylesheet" href="{% static 'css/anatomy.css' %}">
         <link rel="stylesheet" href="{% static 'css/forms.css' %}">
+        <link rel="stylesheet" href="{% static 'css/responsive-utils.css' %}">
         <style>
 
             :root {