diff --git a/web/modules/custom/figli_compta_ledger/css/ledger-form.css b/web/modules/custom/figli_compta_ledger/css/ledger-form.css
new file mode 100644
index 0000000..2f2534c
--- /dev/null
+++ b/web/modules/custom/figli_compta_ledger/css/ledger-form.css
@@ -0,0 +1,220 @@
+/* Ligne comptable add/edit form (node/add/ligne_comptable, node/X/edit --
+   usually seen inside the "+ Ajouter une ligne" / "Modifier" AJAX modal
+   from /lignes, see js/home.js's openAddForm/openEditForm). The default
+   Drupal/Gin admin form widgets (tabledrag drag handles, the paragraphs
+   "Toggle Actions" dropdown, vertical tabs rendered as an accordion) are
+   built for content editors managing arbitrary nodes, not for the small
+   numeric entry form associates fill in daily. This only restyles it
+   into a compact grid -- no Form API behavior, validation, or field
+   structure changes here (those live in figli_compta_ledger.module,
+   which also hides the "advanced" accordion and "Published" checkbox
+   entirely rather than just visually, since neither is ever used for a
+   ligne_comptable).
+
+   Explicit local colors rather than Gin's --gin-* custom properties --
+   this form isn't scoped inside #figli-home-app/#figli-dashboard-app, so
+   the same "don't trust Gin's vars on custom routes" lesson from
+   home.css/dashboard.css applies here too. */
+.figli-ledger-form {
+  --flform-border: #dcdee2;
+  --flform-border-soft: #e8eaed;
+  --flform-label: #4b5563;
+  --flform-text: #1a1a1a;
+  --flform-bg-subtle: #f7f8fa;
+  --flform-accent: #2f6f4f;
+  --flform-danger: #b3261e;
+
+  display: grid;
+  grid-template-columns: repeat(3, 1fr);
+  gap: 0.9rem 1rem;
+  max-width: 44rem;
+  margin: 0 auto;
+  padding: 0.15rem 0.1rem 0.5rem;
+  color: var(--flform-text);
+}
+html.gin--dark-mode .figli-ledger-form {
+  --flform-border: #3d3e42;
+  --flform-border-soft: #333438;
+  --flform-label: #a1a5ab;
+  --flform-text: #e8e9ea;
+  --flform-bg-subtle: #2a2b2e;
+  --flform-accent: #5fb98a;
+  --flform-danger: #ff6b6b;
+}
+
+/* Wrapper divs Drupal still renders even though they're always empty
+   here (single-language site, path aliases handled elsewhere, status
+   hidden via #access in the module) -- without this they'd each still
+   claim an empty grid cell. */
+.figli-ledger-form > .field--name-langcode,
+.figli-ledger-form > .field--name-path,
+.figli-ledger-form > .entity-content-form-footer,
+.figli-ledger-form > .form-actions {
+  display: none;
+}
+
+/* Row layout. Everything not listed here (Montant HT / N° Facture /
+   Montant TTC) is left to grid auto-placement, which -- given they're
+   the only three single-column items appearing consecutively in DOM
+   order -- lines them up as one row of three for free. */
+.figli-ledger-form > .field--name-title,
+.figli-ledger-form > .field--name-field-client,
+.figli-ledger-form > .field--name-field-entree-liee,
+.figli-ledger-form > .field--name-field-repartition,
+.figli-ledger-form > .field--name-field-notes,
+.figli-ledger-form > .field--name-field-flag {
+  grid-column: 1 / -1;
+}
+.figli-ledger-form > .field--name-field-date-ligne {
+  grid-column: 1 / 2;
+}
+.figli-ledger-form > .field--name-field-type-ligne {
+  grid-column: 2 / 4;
+}
+
+/* Field basics */
+.figli-ledger-form .form-item__label {
+  font-size: 0.78rem;
+  font-weight: 600;
+  color: var(--flform-label);
+  margin-bottom: 0.2rem;
+  display: inline-block;
+}
+.figli-ledger-form .form-item__description {
+  font-size: 0.72rem;
+  color: var(--flform-label);
+  margin-top: 0.2rem;
+}
+.figli-ledger-form input.form-element,
+.figli-ledger-form select.form-element,
+.figli-ledger-form textarea.form-element {
+  width: 100%;
+  box-sizing: border-box;
+  border: 1px solid var(--flform-border);
+  border-radius: 6px;
+  padding: 0.4rem 0.55rem;
+  font-size: 0.88rem;
+  background: transparent;
+  color: var(--flform-text);
+}
+.figli-ledger-form input.form-element:focus,
+.figli-ledger-form select.form-element:focus,
+.figli-ledger-form textarea.form-element:focus {
+  outline: 2px solid var(--flform-accent);
+  outline-offset: 1px;
+}
+.figli-ledger-form input[type="date"].form-element {
+  width: auto;
+  min-width: 9.5rem;
+}
+.figli-ledger-form textarea.form-element {
+  resize: vertical;
+}
+
+/* Multi-value tables (Répartition, Entrée client liée): drop the drag
+   handle and the "Show row weights" accessibility toggle for it -- row
+   order never affects the répartition sum or anything displayed
+   downstream, so with the usual 1-3 rows this is pure clutter. Remove
+   isn't affected: it stays in the per-row "Toggle Actions" menu. */
+.figli-ledger-form .tabledrag-toggle-weight-wrapper,
+.figli-ledger-form td.field-multiple-drag {
+  display: none;
+}
+.figli-ledger-form table.field-multiple-table {
+  width: 100%;
+  border-collapse: collapse;
+  background: var(--flform-bg-subtle);
+  border: 1px solid var(--flform-border-soft);
+  border-radius: 8px;
+  overflow: hidden;
+}
+.figli-ledger-form table.field-multiple-table thead th {
+  text-align: left;
+  padding: 0.5rem 0.6rem 0.35rem;
+}
+.figli-ledger-form table.field-multiple-table tbody td {
+  padding: 0.5rem 0.6rem;
+  vertical-align: top;
+  border-top: 1px solid var(--flform-border-soft);
+}
+.figli-ledger-form .field-multiple-table .form-item__label {
+  visibility: visible;
+}
+.figli-ledger-form .paragraphs-subform {
+  display: flex;
+  gap: 0.6rem;
+}
+.figli-ledger-form .paragraphs-subform > .js-form-wrapper {
+  flex: 1;
+  min-width: 0;
+}
+
+/* Buttons: "Ajouter Répartition" / "Add another item", and the per-row
+   Remove/Duplicate/Collapse actions -- all plain Drupal form-submit
+   buttons by default, restyled as a small, consistent set instead of
+   browser-default grey buttons of varying sizes. */
+.figli-ledger-form input.button {
+  font-size: 0.78rem;
+  padding: 0.3rem 0.65rem;
+  border-radius: 5px;
+  border: 1px solid var(--flform-border);
+  background: transparent;
+  color: var(--flform-text);
+  cursor: pointer;
+}
+.figli-ledger-form input.button:hover {
+  border-color: var(--flform-accent);
+  color: var(--flform-accent);
+}
+.figli-ledger-form .field-add-more-submit {
+  margin-top: 0.4rem;
+}
+.figli-ledger-form .paragraphs-dropdown-toggle {
+  border: none;
+  background: transparent;
+  color: var(--flform-label);
+  cursor: pointer;
+  font-size: 1rem;
+  line-height: 1;
+  padding: 0.1rem 0.3rem;
+}
+.figli-ledger-form .paragraphs-dropdown-toggle:hover {
+  color: var(--flform-accent);
+}
+.figli-ledger-form .paragraphs-dropdown-actions {
+  display: flex;
+  flex-direction: column;
+  gap: 0.2rem;
+  padding: 0.3rem;
+  border: 1px solid var(--flform-border);
+  border-radius: 6px;
+  background: var(--flform-bg-subtle);
+}
+
+/* Field group heading style (the Répartition table's own label, inside
+   its <th>) -- match the rest of the form's label typography instead of
+   Drupal's default <h4>. */
+.figli-ledger-form table.field-multiple-table h4.form-item__label {
+  font-size: 0.8rem;
+  margin: 0;
+}
+
+/* A répartition row flagged by the sum-mismatch #validate error (see
+   figli_compta_ledger_validate_repartition()) -- kept subtle (a red
+   outline, not a solid fill) to match the same red-liseré convention
+   used for écarts in the /lignes table itself. */
+.figli-ledger-form tr.error,
+.figli-ledger-form .has-error {
+  outline: 1px solid var(--flform-danger);
+  outline-offset: -1px;
+}
+
+/* Form actions (Save), rendered by the AJAX dialog's own button pane
+   rather than here in most cases, but keep a sane baseline for the
+   rare full-page (non-modal) view of this form. */
+.figli-ledger-form .form-actions input.button--primary {
+  background: var(--flform-accent);
+  color: #fff;
+  border-color: var(--flform-accent);
+  font-weight: 600;
+}
diff --git a/web/modules/custom/figli_compta_ledger/figli_compta_ledger.libraries.yml b/web/modules/custom/figli_compta_ledger/figli_compta_ledger.libraries.yml
index b1a89d9..b66eab1 100644
--- a/web/modules/custom/figli_compta_ledger/figli_compta_ledger.libraries.yml
+++ b/web/modules/custom/figli_compta_ledger/figli_compta_ledger.libraries.yml
@@ -35,6 +35,13 @@ dashboard_compte:
     - core/drupal
     - figli_compta_ledger/vue
 
+ledger_form:
+  css:
+    theme:
+      css/ledger-form.css: {}
+  dependencies:
+    - core/drupal
+
 admin_chrome:
   css:
     theme:
diff --git a/web/modules/custom/figli_compta_ledger/figli_compta_ledger.module b/web/modules/custom/figli_compta_ledger/figli_compta_ledger.module
index 092e6f6..ff6dbae 100644
--- a/web/modules/custom/figli_compta_ledger/figli_compta_ledger.module
+++ b/web/modules/custom/figli_compta_ledger/figli_compta_ledger.module
@@ -35,6 +35,11 @@ function figli_compta_ledger_form_alter(&$form, FormStateInterface $form_state,
   if (!in_array($form_id, ['node_ligne_comptable_form', 'node_ligne_comptable_edit_form'], TRUE)) {
     return;
   }
+  // The add and edit forms get different auto-generated classes
+  // (node-ligne-comptable-form vs. node-ligne-comptable-edit-form) --
+  // one shared class so css/ledger-form.css can target both without
+  // duplicating every selector.
+  $form['#attributes']['class'][] = 'figli-ledger-form';
   $form['#validate'][] = 'figli_compta_ledger_validate_repartition';
 
   // Every save must create a revision, unconditionally -- there's no
@@ -71,6 +76,38 @@ function figli_compta_ledger_form_alter(&$form, FormStateInterface $form_state,
     ];
   }
 
+  // "Title" is generic Drupal boilerplate that means nothing to a
+  // freelancer entering an accounting line -- but home.js/dashboard*.js
+  // do fall back to it as the displayed "Libellé" when Notes / détail is
+  // left empty, so it can't just be hidden. Relabel it so that
+  // relationship is explicit instead of a mystery required field.
+  if (isset($form['title']['widget'][0]['value'])) {
+    $form['title']['widget'][0]['value']['#title'] = t('Libellé court');
+    $form['title']['widget'][0]['value']['#description'] = t('Affiché dans le grand livre si "Notes / détail" ci-dessous est laissé vide.');
+  }
+
+  // Menu settings / URL alias / Authoring information: none of this is
+  // ever used for a ligne_comptable (no menu links, no path aliases, and
+  // the acting user + revision timestamp are already captured by the
+  // forced revision in figli_compta_ledger_node_presave() below) -- just
+  // noise in a form meant to be a quick numeric entry, not a full content
+  // editing screen. #access rather than deleting the keys: safe no-op if
+  // a future field ever gets #group => 'advanced'.
+  if (isset($form['advanced'])) {
+    $form['advanced']['#access'] = FALSE;
+  }
+
+  // "Published" is meaningless here too -- there's no draft/unpublished
+  // workflow for ledger lines, every one of them is expected to count
+  // immediately. Same pattern as the 'revision' field above: force the
+  // value rather than exposing a checkbox nobody should ever touch.
+  if (isset($form['status'])) {
+    $form['status']['widget']['value']['#default_value'] = TRUE;
+    $form['status']['#access'] = FALSE;
+  }
+
+  $form['#attached']['library'][] = 'figli_compta_ledger/ledger_form';
+
   $request = \Drupal::request();
   $wrapper_formats = ['drupal_ajax', 'drupal_modal', 'drupal_dialog'];
   $is_ajax_modal = in_array($request->query->get('_wrapper_format'), $wrapper_formats, TRUE)