diff --git a/public/assets/css/stylesheet.css b/public/assets/css/stylesheet.css
index ea6e1c4..f7710ce 100644
--- a/public/assets/css/stylesheet.css
+++ b/public/assets/css/stylesheet.css
@@ -1,3 +1,20 @@
+@page {
+  size: A4;
+  margin: 20mm 15mm 26mm 15mm;
+}
+
+@page {
+  @bottom-center { content: string(title); }
+}
+
+h2 {
+  break-before: page;
+}
+
+.chapter > h2 {
+  string-set: title content(text);
+}
+
 #chapter-2 {
   font-size: 2rem;
 }
diff --git a/src/App.vue b/src/App.vue
index 99dca4e..b5d616a 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -1,59 +1,33 @@
 <script setup>
 import PagedJsWrapper from './components/PagedJsWrapper.vue';
-import EditorPanel from './components/EditorPanel.vue';
+import EditorPanel from './components/editor/EditorPanel.vue';
 import StylesheetViewer from './components/StylesheetViewer.vue';
 import ElementPopup from './components/ElementPopup.vue';
 import { onMounted, ref, watch } from 'vue';
 import { useStylesheetStore } from './stores/stylesheet';
 
-// ============================================================================
-// Store
-// ============================================================================
 const stylesheetStore = useStylesheetStore();
-
-// ============================================================================
-// PagedJS configuration
-// ============================================================================
-const printStyles = `
-h2 { break-before: page; }
-
-@page {
-  size: A4;
-  margin: 20mm 15mm 26mm 15mm;
-}
-
-@page {
-  @bottom-center { content: string(title); }
-}
-
-.chapter > h2 { string-set: title content(text); }
-`;
-
-// ============================================================================
-// Iframe preview
-// ============================================================================
 const previewFrame = ref(null);
-
-const injectStylesToIframe = () => {
-  const iframe = previewFrame.value;
-  if (!iframe?.contentDocument) return;
-
-  let styleElement = iframe.contentDocument.getElementById('dynamic-styles');
-  if (!styleElement) {
-    styleElement = iframe.contentDocument.createElement('style');
-    styleElement.id = 'dynamic-styles';
-    iframe.contentDocument.head.appendChild(styleElement);
-  }
-  styleElement.textContent = stylesheetStore.content;
-};
-
 const elementPopup = ref(null);
 
-const renderPreview = async () => {
+let savedScrollPercentage = 0;
+
+const renderPreview = async (shouldReloadFromFile = false) => {
   const iframe = previewFrame.value;
   if (!iframe) return;
 
-  await stylesheetStore.loadStylesheet();
+  if (iframe.contentWindow && iframe.contentDocument) {
+    const scrollTop = iframe.contentWindow.scrollY || 0;
+    const scrollHeight = iframe.contentDocument.documentElement.scrollHeight;
+    const clientHeight = iframe.contentWindow.innerHeight;
+    const maxScroll = scrollHeight - clientHeight;
+
+    savedScrollPercentage = maxScroll > 0 ? scrollTop / maxScroll : 0;
+  }
+
+  if (shouldReloadFromFile || !stylesheetStore.content) {
+    await stylesheetStore.loadStylesheet();
+  }
 
   iframe.srcdoc = `
     <!DOCTYPE html>
@@ -61,7 +35,6 @@ const renderPreview = async () => {
     <head>
       <link rel="stylesheet" href="/assets/css/pagedjs-interface.css">
       <style id="dynamic-styles">${stylesheetStore.content}</style>
-      <style>${printStyles}</style>
       <script src="https://unpkg.com/pagedjs/dist/paged.polyfill.js"><\/script>
     </head>
     <body>${document.getElementById('content-source').innerHTML}</body>
@@ -70,14 +43,23 @@ const renderPreview = async () => {
 
   iframe.onload = () => {
     iframe.contentDocument.addEventListener('click', elementPopup.value.handleIframeClick);
+
+    setTimeout(() => {
+      const scrollHeight = iframe.contentDocument.documentElement.scrollHeight;
+      const clientHeight = iframe.contentWindow.innerHeight;
+      const maxScroll = scrollHeight - clientHeight;
+      const targetScroll = savedScrollPercentage * maxScroll;
+
+      iframe.contentWindow.scrollTo(0, targetScroll);
+    }, 500);
   };
 };
 
-// ============================================================================
-// Lifecycle
-// ============================================================================
-watch(() => stylesheetStore.content, injectStylesToIframe);
-onMounted(renderPreview);
+watch(() => stylesheetStore.content, () => {
+  renderPreview();
+});
+
+onMounted(() => renderPreview(true));
 </script>
 
 <template>
diff --git a/src/components/EditorPanel.vue b/src/components/EditorPanel.vue
deleted file mode 100644
index 4eedd0f..0000000
--- a/src/components/EditorPanel.vue
+++ /dev/null
@@ -1,69 +0,0 @@
-<template>
-  <aside id="editor-panel">
-    <h3>Éditeur</h3>
-    <div class="control">
-      <label>Taille de police des paragraphes</label>
-      <input
-        type="number"
-        step="0.1"
-        :value="fontSizeData?.value ?? 1"
-        @input="updateFontSize(parseFloat($event.target.value))"
-      />
-      <span>{{ fontSizeData?.unit ?? 'rem' }}</span>
-    </div>
-  </aside>
-</template>
-
-<script setup>
-import { computed } from 'vue';
-import { useStylesheetStore } from '../stores/stylesheet';
-
-const stylesheetStore = useStylesheetStore();
-
-const fontSizeData = computed(() => {
-  return stylesheetStore.extractValue('p', 'font-size');
-});
-
-const updateFontSize = (value) => {
-  if (!fontSizeData.value) return;
-  stylesheetStore.updateProperty(
-    'p',
-    'font-size',
-    value,
-    fontSizeData.value.unit
-  );
-};
-</script>
-
-<style scoped>
-#editor-panel {
-  position: fixed;
-  top: 0;
-  left: 0;
-  width: 250px;
-  height: 100vh;
-  background: #f5f5f5;
-  padding: 1rem;
-  box-shadow: 2px 0 8px rgba(0, 0, 0, 0.1);
-  overflow-y: auto;
-}
-
-h3 {
-  margin-top: 0;
-}
-
-.control {
-  margin-bottom: 1rem;
-}
-
-.control label {
-  display: block;
-  margin-bottom: 0.25rem;
-  font-size: 0.875rem;
-}
-
-.control input {
-  width: 80px;
-  padding: 0.25rem;
-}
-</style>
diff --git a/src/components/editor/EditorPanel.vue b/src/components/editor/EditorPanel.vue
new file mode 100644
index 0000000..4207ce3
--- /dev/null
+++ b/src/components/editor/EditorPanel.vue
@@ -0,0 +1,84 @@
+<template>
+  <aside id="editor-panel">
+    <nav class="tabs">
+      <button
+        type="button"
+        :class="{ active: activeTab === 'document' }"
+        @click="activeTab = 'document'"
+      >
+        Document
+      </button>
+      <button
+        type="button"
+        :class="{ active: activeTab === 'code' }"
+        @click="activeTab = 'code'"
+      >
+        Code
+      </button>
+      <button
+        type="button"
+        :class="{ active: activeTab === 'contenu' }"
+        @click="activeTab = 'contenu'"
+      >
+        Contenu
+      </button>
+    </nav>
+
+    <div class="tab-content">
+      <div v-if="activeTab === 'document'" class="tab-panel">
+        <PageSettings />
+        <TextSettings />
+      </div>
+
+      <div v-else-if="activeTab === 'code'" class="tab-panel">
+        <!-- Code tab content -->
+      </div>
+
+      <div v-else-if="activeTab === 'contenu'" class="tab-panel">
+        <!-- Contenu tab content -->
+      </div>
+    </div>
+  </aside>
+</template>
+
+<script setup>
+import { ref } from 'vue';
+import PageSettings from './PageSettings.vue';
+import TextSettings from './TextSettings.vue';
+
+// Tab management
+const activeTab = ref('document');
+</script>
+
+<style scoped>
+#editor-panel {
+  position: fixed;
+  top: 0;
+  left: 0;
+  width: 250px;
+  height: 100vh;
+  background: #f5f5f5;
+  padding: 1rem;
+  box-shadow: 2px 0 8px rgba(0, 0, 0, 0.1);
+  overflow-y: auto;
+}
+
+h3 {
+  margin-top: 0;
+}
+
+.control {
+  margin-bottom: 1rem;
+}
+
+.control label {
+  display: block;
+  margin-bottom: 0.25rem;
+  font-size: 0.875rem;
+}
+
+.control input {
+  width: 80px;
+  padding: 0.25rem;
+}
+</style>
diff --git a/src/components/editor/PageSettings.vue b/src/components/editor/PageSettings.vue
new file mode 100644
index 0000000..2bd7f21
--- /dev/null
+++ b/src/components/editor/PageSettings.vue
@@ -0,0 +1,360 @@
+<template>
+  <section class="settings-section">
+    <h2>Réglage des pages</h2>
+
+    <div class="field">
+      <label for="page-format">Format d'impression</label>
+      <select id="page-format" v-model="pageFormat">
+        <option value="A4">A4</option>
+        <option value="A5">A5</option>
+        <option value="A3">A3</option>
+        <option value="letter">Letter</option>
+        <option value="legal">Legal</option>
+      </select>
+    </div>
+
+    <div class="field">
+      <label for="page-width">Largeur</label>
+      <input
+        id="page-width"
+        type="text"
+        :value="pageWidth"
+        disabled
+      />
+    </div>
+
+    <div class="field">
+      <label for="page-height">Hauteur</label>
+      <input
+        id="page-height"
+        type="text"
+        :value="pageHeight"
+        disabled
+      />
+    </div>
+
+    <div class="subsection">
+      <h3>Marges</h3>
+
+      <div class="field">
+        <label for="margin-top">Haut</label>
+        <div class="field-with-unit">
+          <input
+            id="margin-top"
+            type="number"
+            v-model.number="margins.top.value"
+            min="0"
+          />
+          <div class="unit-toggle">
+            <button
+              type="button"
+              :class="{ active: margins.top.unit === 'mm' }"
+              @click="margins.top.unit = 'mm'"
+            >
+              mm
+            </button>
+            <button
+              type="button"
+              :class="{ active: margins.top.unit === 'px' }"
+              @click="margins.top.unit = 'px'"
+            >
+              px
+            </button>
+          </div>
+        </div>
+      </div>
+
+      <div class="field">
+        <label for="margin-bottom">Bas</label>
+        <div class="field-with-unit">
+          <input
+            id="margin-bottom"
+            type="number"
+            v-model.number="margins.bottom.value"
+            min="0"
+          />
+          <div class="unit-toggle">
+            <button
+              type="button"
+              :class="{ active: margins.bottom.unit === 'mm' }"
+              @click="margins.bottom.unit = 'mm'"
+            >
+              mm
+            </button>
+            <button
+              type="button"
+              :class="{ active: margins.bottom.unit === 'px' }"
+              @click="margins.bottom.unit = 'px'"
+            >
+              px
+            </button>
+          </div>
+        </div>
+      </div>
+
+      <div class="field">
+        <label for="margin-left">Gauche</label>
+        <div class="field-with-unit">
+          <input
+            id="margin-left"
+            type="number"
+            v-model.number="margins.left.value"
+            min="0"
+          />
+          <div class="unit-toggle">
+            <button
+              type="button"
+              :class="{ active: margins.left.unit === 'mm' }"
+              @click="margins.left.unit = 'mm'"
+            >
+              mm
+            </button>
+            <button
+              type="button"
+              :class="{ active: margins.left.unit === 'px' }"
+              @click="margins.left.unit = 'px'"
+            >
+              px
+            </button>
+          </div>
+        </div>
+      </div>
+
+      <div class="field">
+        <label for="margin-right">Droite</label>
+        <div class="field-with-unit">
+          <input
+            id="margin-right"
+            type="number"
+            v-model.number="margins.right.value"
+            min="0"
+          />
+          <div class="unit-toggle">
+            <button
+              type="button"
+              :class="{ active: margins.right.unit === 'mm' }"
+              @click="margins.right.unit = 'mm'"
+            >
+              mm
+            </button>
+            <button
+              type="button"
+              :class="{ active: margins.right.unit === 'px' }"
+              @click="margins.right.unit = 'px'"
+            >
+              px
+            </button>
+          </div>
+        </div>
+      </div>
+    </div>
+
+    <div class="field">
+      <label for="background">Arrière-plan</label>
+      <div class="field-with-unit">
+        <input
+          id="background"
+          type="text"
+          v-model="background.value"
+        />
+        <div class="unit-toggle">
+          <button
+            type="button"
+            :class="{ active: background.format === 'rgb' }"
+            @click="background.format = 'rgb'"
+          >
+            rgb
+          </button>
+          <button
+            type="button"
+            :class="{ active: background.format === 'hex' }"
+            @click="background.format = 'hex'"
+          >
+            hex
+          </button>
+        </div>
+      </div>
+    </div>
+
+    <div class="field">
+      <label for="pattern">Motif</label>
+      <select id="pattern" v-model="pattern">
+        <option value="">Choisissez</option>
+        <option value="dots">Points</option>
+        <option value="lines">Lignes</option>
+        <option value="grid">Grille</option>
+      </select>
+    </div>
+
+    <div class="field checkbox-field">
+      <input
+        id="page-numbers"
+        type="checkbox"
+        v-model="pageNumbers"
+      />
+      <label for="page-numbers">Numéro de page</label>
+    </div>
+
+    <div class="field checkbox-field">
+      <input
+        id="running-title"
+        type="checkbox"
+        v-model="runningTitle"
+      />
+      <label for="running-title">Titre courant</label>
+    </div>
+  </section>
+</template>
+
+<script setup>
+import { ref, computed, watch, onMounted } from 'vue';
+import { useStylesheetStore } from '../../stores/stylesheet';
+
+const stylesheetStore = useStylesheetStore();
+
+let isUpdatingFromStore = false;
+let updateTimer = null;
+
+const pageFormat = ref('A4');
+
+const pageFormats = {
+  A4: { width: '210mm', height: '297mm' },
+  A5: { width: '148mm', height: '210mm' },
+  A3: { width: '297mm', height: '420mm' },
+  letter: { width: '8.5in', height: '11in' },
+  legal: { width: '8.5in', height: '14in' }
+};
+
+const pageWidth = computed(() => pageFormats[pageFormat.value].width);
+const pageHeight = computed(() => pageFormats[pageFormat.value].height);
+
+const margins = ref({
+  top: { value: 20, unit: 'mm' },
+  bottom: { value: 20, unit: 'mm' },
+  left: { value: 20, unit: 'mm' },
+  right: { value: 20, unit: 'mm' }
+});
+
+const background = ref({
+  value: '',
+  format: 'hex'
+});
+
+const pattern = ref('');
+const pageNumbers = ref(false);
+const runningTitle = ref(false);
+
+const debouncedUpdate = (callback) => {
+  clearTimeout(updateTimer);
+  updateTimer = setTimeout(callback, 1000);
+};
+
+watch(pageFormat, (newFormat) => {
+  if (isUpdatingFromStore) return;
+
+  debouncedUpdate(() => {
+    stylesheetStore.updateProperty('@page', 'size', newFormat, '');
+  });
+});
+
+watch(margins, (newMargins) => {
+  if (isUpdatingFromStore) return;
+
+  debouncedUpdate(() => {
+    const marginValue = `${newMargins.top.value}${newMargins.top.unit} ${newMargins.right.value}${newMargins.right.unit} ${newMargins.bottom.value}${newMargins.bottom.unit} ${newMargins.left.value}${newMargins.left.unit}`;
+
+    const currentBlock = stylesheetStore.extractBlock('@page');
+    const updatedBlock = currentBlock.replace(
+      /(margin:\s*)[^;]+/,
+      `$1${marginValue}`
+    );
+
+    stylesheetStore.content = stylesheetStore.content.replace(currentBlock, updatedBlock);
+  });
+}, { deep: true });
+
+watch(background, (newBg) => {
+  if (!newBg.value) return;
+  if (isUpdatingFromStore) return;
+
+  debouncedUpdate(() => {
+    const currentBlock = stylesheetStore.extractBlock('@page');
+
+    if (currentBlock.includes('background:')) {
+      const updatedBlock = currentBlock.replace(
+        /(background:\s*)[^;]+/,
+        `$1${newBg.value}`
+      );
+      stylesheetStore.content = stylesheetStore.content.replace(currentBlock, updatedBlock);
+    } else {
+      const updatedBlock = currentBlock.replace(
+        /(\s*})$/,
+        `  background: ${newBg.value};\n$1`
+      );
+      stylesheetStore.content = stylesheetStore.content.replace(currentBlock, updatedBlock);
+    }
+  });
+}, { deep: true });
+
+watch(pattern, (newPattern) => {
+  if (!newPattern || isUpdatingFromStore) return;
+
+  debouncedUpdate(() => {
+    // TODO: implement pattern application
+  });
+});
+
+watch(pageNumbers, (enabled) => {
+  if (isUpdatingFromStore) return;
+
+  debouncedUpdate(() => {
+    // TODO: implement page numbers toggle
+  });
+});
+
+watch(runningTitle, (enabled) => {
+  if (isUpdatingFromStore) return;
+
+  debouncedUpdate(() => {
+    // TODO: implement running title toggle
+  });
+});
+
+const syncFromStore = () => {
+  isUpdatingFromStore = true;
+
+  try {
+    const pageBlock = stylesheetStore.extractBlock('@page');
+
+    const sizeMatch = pageBlock.match(/size:\s*([A-Za-z0-9]+)/);
+    if (sizeMatch) {
+      pageFormat.value = sizeMatch[1];
+    }
+
+    const marginMatch = pageBlock.match(/margin:\s*([0-9.]+)([a-z]+)\s+([0-9.]+)([a-z]+)\s+([0-9.]+)([a-z]+)\s+([0-9.]+)([a-z]+)/i);
+    if (marginMatch) {
+      margins.value.top = { value: parseFloat(marginMatch[1]), unit: marginMatch[2] };
+      margins.value.right = { value: parseFloat(marginMatch[3]), unit: marginMatch[4] };
+      margins.value.bottom = { value: parseFloat(marginMatch[5]), unit: marginMatch[6] };
+      margins.value.left = { value: parseFloat(marginMatch[7]), unit: marginMatch[8] };
+    }
+
+    const bgMatch = pageBlock.match(/background:\s*([^;]+)/);
+    if (bgMatch) {
+      background.value.value = bgMatch[1].trim();
+    }
+  } finally {
+    isUpdatingFromStore = false;
+  }
+};
+
+watch(() => stylesheetStore.content, () => {
+  if (!isUpdatingFromStore) {
+    syncFromStore();
+  }
+});
+
+onMounted(() => {
+  syncFromStore();
+});
+</script>
diff --git a/src/components/editor/TextSettings.vue b/src/components/editor/TextSettings.vue
new file mode 100644
index 0000000..a72a39f
--- /dev/null
+++ b/src/components/editor/TextSettings.vue
@@ -0,0 +1,604 @@
+<template>
+  <section class="settings-section">
+    <h2>Réglage du texte</h2>
+    <p class="infos">
+      Ces réglages s'appliquent à l'ensemble des éléments du document.
+      Vous pouvez modifier ensuite les éléments indépendamment.
+    </p>
+
+    <div class="field">
+      <label for="text-font">Police</label>
+      <div class="field-with-option">
+        <select id="text-font" v-model="font">
+          <option value="Alegreya Sans">Alegreya Sans</option>
+          <option value="Arial">Arial</option>
+          <option value="Georgia">Georgia</option>
+          <option value="Helvetica">Helvetica</option>
+          <option value="Times New Roman">Times New Roman</option>
+        </select>
+        <div class="field-checkbox">
+          <input
+            id="text-italic"
+            type="checkbox"
+            v-model="italic"
+          />
+          <label for="text-italic">Italique</label>
+        </div>
+      </div>
+    </div>
+
+    <div class="field">
+      <label>Graisse</label>
+      <div class="weight-toggle">
+        <button
+          type="button"
+          :class="{ active: weight === '200' }"
+          @click="weight = '200'"
+        >
+          200
+        </button>
+        <button
+          type="button"
+          :class="{ active: weight === '300' }"
+          @click="weight = '300'"
+        >
+          300
+        </button>
+        <button
+          type="button"
+          :class="{ active: weight === '400' }"
+          @click="weight = '400'"
+        >
+          400
+        </button>
+        <button
+          type="button"
+          :class="{ active: weight === '600' }"
+          @click="weight = '600'"
+        >
+          600
+        </button>
+        <button
+          type="button"
+          :class="{ active: weight === '800' }"
+          @click="weight = '800'"
+        >
+          800
+        </button>
+        <button
+          type="button"
+          :class="{ active: weight === 'normal' }"
+          @click="weight = 'normal'"
+        >
+          normal
+        </button>
+        <button
+          type="button"
+          :class="{ active: weight === 'bold' }"
+          @click="weight = 'bold'"
+        >
+          bold
+        </button>
+      </div>
+    </div>
+
+    <div class="field">
+      <label for="text-size-range">Taille du texte</label>
+      <div class="field-with-unit">
+        <input
+          id="text-size-range"
+          type="range"
+          v-model.number="fontSize.value"
+          min="8"
+          max="72"
+          step="1"
+        />
+        <input
+          type="number"
+          v-model.number="fontSize.value"
+          min="8"
+          max="72"
+          step="1"
+          class="size-input"
+        />
+        <div class="unit-toggle">
+          <button
+            type="button"
+            :class="{ active: fontSize.unit === 'px' }"
+            @click="fontSize.unit = 'px'"
+          >
+            px
+          </button>
+          <button
+            type="button"
+            :class="{ active: fontSize.unit === 'em' }"
+            @click="fontSize.unit = 'em'"
+          >
+            em
+          </button>
+          <button
+            type="button"
+            :class="{ active: fontSize.unit === 'rem' }"
+            @click="fontSize.unit = 'rem'"
+          >
+            rem
+          </button>
+        </div>
+      </div>
+    </div>
+
+    <div class="field">
+      <label for="text-alignment">Alignement</label>
+      <select id="text-alignment" v-model="alignment">
+        <option value="left">Gauche</option>
+        <option value="center">Centre</option>
+        <option value="right">Droite</option>
+        <option value="justify">Justifié</option>
+      </select>
+    </div>
+
+    <div class="field">
+      <label for="text-color">Couleur</label>
+      <div class="field-with-color">
+        <input
+          type="color"
+          v-model="color.picker"
+          class="color-picker"
+        />
+        <input
+          id="text-color"
+          type="text"
+          v-model="color.value"
+          class="color-input"
+        />
+        <div class="unit-toggle">
+          <button
+            type="button"
+            :class="{ active: color.format === 'rgb' }"
+            @click="color.format = 'rgb'"
+          >
+            rgb
+          </button>
+          <button
+            type="button"
+            :class="{ active: color.format === 'hex' }"
+            @click="color.format = 'hex'"
+          >
+            hex
+          </button>
+          <button
+            type="button"
+            class="clear-btn"
+            @click="clearColor"
+            title="Réinitialiser"
+          >
+            ×
+          </button>
+        </div>
+      </div>
+    </div>
+
+    <div class="field">
+      <label for="text-background">Arrière-plan</label>
+      <div class="field-with-color">
+        <button
+          type="button"
+          class="toggle-btn"
+          :class="{ active: background.enabled }"
+          @click="background.enabled = !background.enabled"
+        >
+          ×
+        </button>
+        <input
+          id="text-background"
+          type="text"
+          v-model="background.value"
+          :disabled="!background.enabled"
+          class="color-input"
+        />
+        <div class="unit-toggle">
+          <button
+            type="button"
+            :class="{ active: background.format === 'rgb' }"
+            :disabled="!background.enabled"
+            @click="background.format = 'rgb'"
+          >
+            rgb
+          </button>
+          <button
+            type="button"
+            :class="{ active: background.format === 'hex' }"
+            :disabled="!background.enabled"
+            @click="background.format = 'hex'"
+          >
+            hex
+          </button>
+          <button
+            type="button"
+            class="clear-btn"
+            :disabled="!background.enabled"
+            @click="clearBackground"
+            title="Effacer"
+          >
+            ×
+          </button>
+        </div>
+      </div>
+    </div>
+
+    <div class="field">
+      <label for="margin-outer">Marges extérieures</label>
+      <div class="field-with-unit">
+        <input
+          id="margin-outer"
+          type="number"
+          v-model.number="marginOuter.value"
+          min="0"
+        />
+        <div class="unit-toggle">
+          <button
+            type="button"
+            :class="{ active: marginOuter.unit === 'mm' }"
+            @click="marginOuter.unit = 'mm'"
+          >
+            mm
+          </button>
+          <button
+            type="button"
+            :class="{ active: marginOuter.unit === 'px' }"
+            @click="marginOuter.unit = 'px'"
+          >
+            px
+          </button>
+        </div>
+        <button
+          type="button"
+          class="collapse-toggle"
+          :class="{ expanded: marginOuterExpanded }"
+          @click="marginOuterExpanded = !marginOuterExpanded"
+          title="Réglages détaillés"
+        >
+          ▶
+        </button>
+      </div>
+    </div>
+
+    <div v-if="marginOuterExpanded" class="subsection collapsed-section">
+      <div class="field">
+        <label for="margin-outer-top">Haut</label>
+        <div class="field-with-unit">
+          <input
+            id="margin-outer-top"
+            type="number"
+            v-model.number="marginOuterDetailed.top.value"
+            min="0"
+          />
+          <div class="unit-toggle">
+            <button
+              type="button"
+              :class="{ active: marginOuterDetailed.top.unit === 'mm' }"
+              @click="marginOuterDetailed.top.unit = 'mm'"
+            >
+              mm
+            </button>
+            <button
+              type="button"
+              :class="{ active: marginOuterDetailed.top.unit === 'px' }"
+              @click="marginOuterDetailed.top.unit = 'px'"
+            >
+              px
+            </button>
+          </div>
+        </div>
+      </div>
+
+      <div class="field">
+        <label for="margin-outer-bottom">Bas</label>
+        <div class="field-with-unit">
+          <input
+            id="margin-outer-bottom"
+            type="number"
+            v-model.number="marginOuterDetailed.bottom.value"
+            min="0"
+          />
+          <div class="unit-toggle">
+            <button
+              type="button"
+              :class="{ active: marginOuterDetailed.bottom.unit === 'mm' }"
+              @click="marginOuterDetailed.bottom.unit = 'mm'"
+            >
+              mm
+            </button>
+            <button
+              type="button"
+              :class="{ active: marginOuterDetailed.bottom.unit === 'px' }"
+              @click="marginOuterDetailed.bottom.unit = 'px'"
+            >
+              px
+            </button>
+          </div>
+        </div>
+      </div>
+
+      <div class="field">
+        <label for="margin-outer-left">Gauche</label>
+        <div class="field-with-unit">
+          <input
+            id="margin-outer-left"
+            type="number"
+            v-model.number="marginOuterDetailed.left.value"
+            min="0"
+          />
+          <div class="unit-toggle">
+            <button
+              type="button"
+              :class="{ active: marginOuterDetailed.left.unit === 'mm' }"
+              @click="marginOuterDetailed.left.unit = 'mm'"
+            >
+              mm
+            </button>
+            <button
+              type="button"
+              :class="{ active: marginOuterDetailed.left.unit === 'px' }"
+              @click="marginOuterDetailed.left.unit = 'px'"
+            >
+              px
+            </button>
+          </div>
+        </div>
+      </div>
+
+      <div class="field">
+        <label for="margin-outer-right">Droite</label>
+        <div class="field-with-unit">
+          <input
+            id="margin-outer-right"
+            type="number"
+            v-model.number="marginOuterDetailed.right.value"
+            min="0"
+          />
+          <div class="unit-toggle">
+            <button
+              type="button"
+              :class="{ active: marginOuterDetailed.right.unit === 'mm' }"
+              @click="marginOuterDetailed.right.unit = 'mm'"
+            >
+              mm
+            </button>
+            <button
+              type="button"
+              :class="{ active: marginOuterDetailed.right.unit === 'px' }"
+              @click="marginOuterDetailed.right.unit = 'px'"
+            >
+              px
+            </button>
+          </div>
+        </div>
+      </div>
+    </div>
+
+    <div class="field">
+      <label for="margin-inner">Marges intérieures</label>
+      <div class="field-with-unit">
+        <input
+          id="margin-inner"
+          type="number"
+          v-model.number="marginInner.value"
+          min="0"
+        />
+        <div class="unit-toggle">
+          <button
+            type="button"
+            :class="{ active: marginInner.unit === 'mm' }"
+            @click="marginInner.unit = 'mm'"
+          >
+            mm
+          </button>
+          <button
+            type="button"
+            :class="{ active: marginInner.unit === 'px' }"
+            @click="marginInner.unit = 'px'"
+          >
+            px
+          </button>
+        </div>
+        <button
+          type="button"
+          class="collapse-toggle"
+          :class="{ expanded: marginInnerExpanded }"
+          @click="marginInnerExpanded = !marginInnerExpanded"
+          title="Réglages détaillés"
+        >
+          ▶
+        </button>
+      </div>
+    </div>
+
+    <div v-if="marginInnerExpanded" class="subsection collapsed-section">
+      <div class="field">
+        <label for="margin-inner-top">Haut</label>
+        <div class="field-with-unit">
+          <input
+            id="margin-inner-top"
+            type="number"
+            v-model.number="marginInnerDetailed.top.value"
+            min="0"
+          />
+          <div class="unit-toggle">
+            <button
+              type="button"
+              :class="{ active: marginInnerDetailed.top.unit === 'mm' }"
+              @click="marginInnerDetailed.top.unit = 'mm'"
+            >
+              mm
+            </button>
+            <button
+              type="button"
+              :class="{ active: marginInnerDetailed.top.unit === 'px' }"
+              @click="marginInnerDetailed.top.unit = 'px'"
+            >
+              px
+            </button>
+          </div>
+        </div>
+      </div>
+
+      <div class="field">
+        <label for="margin-inner-bottom">Bas</label>
+        <div class="field-with-unit">
+          <input
+            id="margin-inner-bottom"
+            type="number"
+            v-model.number="marginInnerDetailed.bottom.value"
+            min="0"
+          />
+          <div class="unit-toggle">
+            <button
+              type="button"
+              :class="{ active: marginInnerDetailed.bottom.unit === 'mm' }"
+              @click="marginInnerDetailed.bottom.unit = 'mm'"
+            >
+              mm
+            </button>
+            <button
+              type="button"
+              :class="{ active: marginInnerDetailed.bottom.unit === 'px' }"
+              @click="marginInnerDetailed.bottom.unit = 'px'"
+            >
+              px
+            </button>
+          </div>
+        </div>
+      </div>
+
+      <div class="field">
+        <label for="margin-inner-left">Gauche</label>
+        <div class="field-with-unit">
+          <input
+            id="margin-inner-left"
+            type="number"
+            v-model.number="marginInnerDetailed.left.value"
+            min="0"
+          />
+          <div class="unit-toggle">
+            <button
+              type="button"
+              :class="{ active: marginInnerDetailed.left.unit === 'mm' }"
+              @click="marginInnerDetailed.left.unit = 'mm'"
+            >
+              mm
+            </button>
+            <button
+              type="button"
+              :class="{ active: marginInnerDetailed.left.unit === 'px' }"
+              @click="marginInnerDetailed.left.unit = 'px'"
+            >
+              px
+            </button>
+          </div>
+        </div>
+      </div>
+
+      <div class="field">
+        <label for="margin-inner-right">Droite</label>
+        <div class="field-with-unit">
+          <input
+            id="margin-inner-right"
+            type="number"
+            v-model.number="marginInnerDetailed.right.value"
+            min="0"
+          />
+          <div class="unit-toggle">
+            <button
+              type="button"
+              :class="{ active: marginInnerDetailed.right.unit === 'mm' }"
+              @click="marginInnerDetailed.right.unit = 'mm'"
+            >
+              mm
+            </button>
+            <button
+              type="button"
+              :class="{ active: marginInnerDetailed.right.unit === 'px' }"
+              @click="marginInnerDetailed.right.unit = 'px'"
+            >
+              px
+            </button>
+          </div>
+        </div>
+      </div>
+    </div>
+  </section>
+</template>
+
+<script setup>
+import { ref } from 'vue';
+
+// Font
+const font = ref('Alegreya Sans');
+const italic = ref(false);
+
+// Weight
+const weight = ref('400');
+
+// Font size
+const fontSize = ref({
+  value: 23,
+  unit: 'px'
+});
+
+// Alignment
+const alignment = ref('left');
+
+// Color
+const color = ref({
+  picker: '#000000',
+  value: 'rgb(250, 250, 250)',
+  format: 'rgb'
+});
+
+const clearColor = () => {
+  color.value.picker = '#000000';
+  color.value.value = '';
+};
+
+// Background
+const background = ref({
+  enabled: false,
+  value: 'transparent',
+  format: 'hex'
+});
+
+const clearBackground = () => {
+  background.value.value = 'transparent';
+};
+
+// Margin outer
+const marginOuter = ref({
+  value: 23,
+  unit: 'mm'
+});
+
+const marginOuterExpanded = ref(false);
+
+const marginOuterDetailed = ref({
+  top: { value: 23, unit: 'mm' },
+  bottom: { value: 23, unit: 'mm' },
+  left: { value: 23, unit: 'mm' },
+  right: { value: 23, unit: 'mm' }
+});
+
+// Margin inner
+const marginInner = ref({
+  value: 23,
+  unit: 'mm'
+});
+
+const marginInnerExpanded = ref(false);
+
+const marginInnerDetailed = ref({
+  top: { value: 23, unit: 'mm' },
+  bottom: { value: 23, unit: 'mm' },
+  left: { value: 23, unit: 'mm' },
+  right: { value: 23, unit: 'mm' }
+});
+</script>
diff --git a/src/utils/css-parsing.js b/src/utils/css-parsing.js
index 2696347..08edd4c 100644
--- a/src/utils/css-parsing.js
+++ b/src/utils/css-parsing.js
@@ -1,33 +1,9 @@
-/**
- * CSS parsing utilities for extracting and manipulating CSS rules
- * @module css-parsing
- */
-
-/**
- * Extracts a complete CSS block for a given selector
- * @param {string} css - The CSS stylesheet content
- * @param {string} selector - The CSS selector to find (e.g., '@page', '.my-class')
- * @returns {string} The matched CSS block including selector and braces, or empty string if not found
- * @example
- * const css = '@page { margin: 20mm; }';
- * extractCssBlock(css, '@page'); // '@page { margin: 20mm; }'
- */
 const extractCssBlock = (css, selector) => {
   const escaped = selector.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
   const match = css.match(new RegExp(`${escaped}\\s*{[^}]*}`, 'gi'));
   return match ? match[0] : '';
 };
 
-/**
- * Extracts a CSS property value and its unit from a stylesheet
- * @param {string} css - The CSS stylesheet content
- * @param {string} selector - The CSS selector to search within
- * @param {string} property - The CSS property name to extract
- * @returns {{value: number, unit: string}|null} Object with numeric value and unit, or null if not found
- * @example
- * const css = '@page { margin: 20mm; }';
- * extractCssValue(css, '@page', 'margin'); // { value: 20, unit: 'mm' }
- */
 const extractCssValue = (css, selector, property) => {
   const escaped = selector.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
   const regex = new RegExp(
@@ -38,26 +14,17 @@ const extractCssValue = (css, selector, property) => {
   return match ? { value: parseFloat(match[1]), unit: match[2] } : null;
 };
 
-/**
- * Updates a CSS property value in a stylesheet
- * @param {Object} options - Configuration object
- * @param {string} options.css - The CSS stylesheet content to modify
- * @param {string} options.selector - The CSS selector to target
- * @param {string} options.property - The CSS property to update
- * @param {number} options.value - The new numeric value
- * @param {string} options.unit - The CSS unit (px, rem, em, mm, cm, in, etc.)
- * @returns {string} The modified CSS stylesheet content
- * @example
- * updateCssValue({
- *   css: '@page { margin: 20mm; }',
- *   selector: '@page',
- *   property: 'margin',
- *   value: 30,
- *   unit: 'mm'
- * }); // '@page { margin: 30mm; }'
- */
 const updateCssValue = ({ css, selector, property, value, unit }) => {
   const escaped = selector.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
+
+  if (unit === '') {
+    const regex = new RegExp(
+      `(${escaped}\\s*{[^}]*${property}:\\s*)[^;]+`,
+      'gi'
+    );
+    return css.replace(regex, `$1${value}`);
+  }
+
   const regex = new RegExp(
     `(${escaped}\\s*{[^}]*${property}:\\s*)[\\d.]+(px|rem|em|mm|cm|in)`,
     'gi'
@@ -65,13 +32,6 @@ const updateCssValue = ({ css, selector, property, value, unit }) => {
   return css.replace(regex, `$1${value}${unit}`);
 };
 
-/**
- * Collection of CSS parsing utilities
- * @type {Object}
- * @property {Function} extractCssBlock - Extract a CSS block by selector
- * @property {Function} extractCssValue - Extract a property value with unit
- * @property {Function} updateCssValue - Update a property value in CSS
- */
 const cssParsingUtils = { extractCssBlock, extractCssValue, updateCssValue };
 
 export default cssParsingUtils;
