diff --git a/src/features/documents/components/DocumentTemplateEditor.vue b/src/features/documents/components/DocumentTemplateEditor.vue
index 6490b1e..39bb771 100644
--- a/src/features/documents/components/DocumentTemplateEditor.vue
+++ b/src/features/documents/components/DocumentTemplateEditor.vue
@@ -23,6 +23,8 @@ const emit = defineEmits(['update:modelValue', 'save', 'cancel'])
 const { TIPOS_TEMPLATE, TEMPLATE_VARIABLES, variablesGrouped, previewHtml } = useDocumentTemplates()
 
 const activeTab = ref('editor')  // editor | preview
+// Sub-tab do editor (centro do layout 3-col): qual seção renderiza
+const editorTab = ref('corpo')  // cabecalho | corpo | rodape
 
 // ── Form reativo synced com modelValue ──────────────────────
 
@@ -89,127 +91,469 @@ function onSave() {
 }
 </script>
 
+<style scoped>
+/* ═══════ Page chrome (preenche o espaço do container pai) ═══════ */
+.dte-page {
+    flex: 1;
+    display: flex;
+    flex-direction: column;
+    gap: 12px;
+    min-height: 0;
+    /* padding pra não grudar nas bordas do container pai (mdt-body) */
+    padding: 12px;
+    /* fallback pra quando o pai não é flex */
+    height: 100%;
+}
+
+.dte-toolbar {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    gap: 10px;
+    padding: 12px 16px;
+    background: var(--surface-card);
+    border: 1px solid var(--surface-border);
+    border-radius: 10px;
+    flex-shrink: 0;
+}
+.dte-toolbar__title {
+    display: inline-flex;
+    align-items: center;
+    gap: 8px;
+    font-size: 0.92rem;
+    font-weight: 600;
+    color: var(--text-color);
+}
+.dte-toolbar__title > i {
+    color: var(--text-color-secondary);
+    opacity: 0.7;
+}
+.dte-toolbar__tabs {
+    display: inline-flex;
+    align-items: center;
+    gap: 6px;
+}
+
+/* ═══════ 3-col grid (form / editor / variáveis) ═══════ */
+.dte-cols {
+    flex: 1;
+    min-height: 0;
+    display: grid;
+    grid-template-columns: minmax(240px, 280px) minmax(0, 1fr) minmax(220px, 260px);
+    gap: 12px;
+    align-items: stretch;
+}
+
+/* COL 1 — Form metadados */
+.dte-side {
+    background: var(--surface-card);
+    border: 1px solid var(--surface-border);
+    border-radius: 10px;
+    display: flex;
+    flex-direction: column;
+    min-height: 0;
+    overflow: hidden;
+}
+.dte-side__head {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+    padding: 12px 14px;
+    border-bottom: 1px solid var(--surface-border);
+    font-size: 0.85rem;
+    font-weight: 600;
+    color: var(--text-color);
+    flex-shrink: 0;
+}
+.dte-side__head > i {
+    color: var(--text-color-secondary);
+    opacity: 0.7;
+}
+.dte-side__body {
+    flex: 1;
+    min-height: 0;
+    overflow-y: auto;
+    padding: 14px;
+    display: flex;
+    flex-direction: column;
+    gap: 12px;
+    scrollbar-width: thin;
+}
+.dte-field {
+    display: flex;
+    flex-direction: column;
+    gap: 4px;
+}
+.dte-field label {
+    font-size: 0.72rem;
+    font-weight: 600;
+    color: var(--text-color-secondary);
+}
+
+/* COL 2 — Editor com sub-tabs */
+.dte-main {
+    background: var(--surface-card);
+    border: 1px solid var(--surface-border);
+    border-radius: 10px;
+    display: flex;
+    flex-direction: column;
+    min-height: 0;
+    overflow: hidden;
+}
+.dte-main__tabs {
+    display: flex;
+    align-items: center;
+    gap: 0;
+    border-bottom: 1px solid var(--surface-border);
+    background: var(--surface-ground);
+    flex-shrink: 0;
+}
+.dte-tab {
+    display: inline-flex;
+    align-items: center;
+    gap: 8px;
+    padding: 12px 18px;
+    background: transparent;
+    border: none;
+    border-bottom: 2px solid transparent;
+    color: var(--text-color-secondary);
+    font-size: 0.85rem;
+    font-weight: 600;
+    cursor: pointer;
+    transition: color 140ms ease, border-color 140ms ease, background-color 140ms ease;
+    font-family: inherit;
+}
+.dte-tab:hover {
+    color: var(--text-color);
+    background: color-mix(in srgb, var(--p-primary-color) 4%, transparent);
+}
+.dte-tab.is-active {
+    color: var(--p-primary-color);
+    border-bottom-color: var(--p-primary-color);
+    background: color-mix(in srgb, var(--p-primary-color) 6%, transparent);
+}
+.dte-tab > i { font-size: 0.82rem; }
+
+.dte-main__editor {
+    flex: 1;
+    min-height: 0;
+    overflow-y: auto;
+    padding: 14px;
+    background: var(--surface-card);
+    scrollbar-width: thin;
+}
+.dte-editor-wrap {
+    min-height: 450px;
+    display: flex;
+    flex-direction: column;
+}
+.dte-editor-wrap > * {
+    flex: 1;
+    min-height: 450px;
+}
+
+/* COL 3 — Variáveis */
+.dte-vars {
+    background: var(--surface-card);
+    border: 1px solid var(--surface-border);
+    border-radius: 10px;
+    display: flex;
+    flex-direction: column;
+    min-height: 0;
+    overflow: hidden;
+}
+.dte-vars__head {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+    padding: 12px 14px 8px;
+    font-size: 0.85rem;
+    font-weight: 600;
+    color: var(--text-color);
+    flex-shrink: 0;
+}
+.dte-vars__head > i {
+    color: var(--p-primary-color);
+}
+.dte-vars__hint {
+    margin: 0 14px 6px;
+    font-size: 0.72rem;
+    color: var(--text-color-secondary);
+    line-height: 1.4;
+    flex-shrink: 0;
+}
+.dte-vars__hint strong {
+    color: var(--text-color);
+}
+.dte-vars__list {
+    flex: 1;
+    min-height: 0;
+    overflow-y: auto;
+    padding: 4px 10px 12px;
+    display: flex;
+    flex-direction: column;
+    gap: 14px;
+    scrollbar-width: thin;
+}
+.dte-vars__group {
+    display: flex;
+    flex-direction: column;
+    gap: 4px;
+}
+.dte-vars__group-title {
+    font-size: 0.62rem;
+    font-weight: 700;
+    text-transform: uppercase;
+    letter-spacing: 0.1em;
+    color: var(--text-color-secondary);
+    opacity: 0.75;
+    padding: 0 4px;
+}
+.dte-vars__group-items {
+    display: flex;
+    flex-direction: column;
+    gap: 2px;
+}
+.dte-vars__btn {
+    display: flex;
+    align-items: center;
+    gap: 4px;
+    padding: 6px 8px;
+    background: transparent;
+    border: none;
+    border-radius: 6px;
+    color: var(--text-color);
+    font-size: 0.74rem;
+    text-align: left;
+    cursor: pointer;
+    transition: background-color 120ms ease, color 120ms ease;
+    font-family: inherit;
+}
+.dte-vars__btn:hover {
+    background: color-mix(in srgb, var(--p-primary-color) 10%, transparent);
+    color: var(--p-primary-color);
+}
+.dte-vars__btn-brace {
+    font-family: 'JetBrains Mono', 'Consolas', monospace;
+    font-size: 0.66rem;
+    color: var(--p-primary-color);
+    opacity: 0.6;
+}
+.dte-vars__btn-label {
+    flex: 1;
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+}
+
+/* ═══════ Preview ═══════ */
+.dte-preview {
+    flex: 1;
+    min-height: 0;
+    overflow-y: auto;
+    background: var(--surface-ground);
+    border: 1px solid var(--surface-border);
+    border-radius: 10px;
+    padding: 24px;
+    display: flex;
+    justify-content: center;
+}
+.dte-preview__doc {
+    background: white;
+    color: #1a1a1a;
+    border-radius: 6px;
+    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
+    width: 100%;
+    max-width: 794px; /* ≈ A4 a 96dpi */
+    padding: 48px 56px;
+    font-family: 'Segoe UI', Arial, sans-serif;
+    font-size: 12pt;
+    line-height: 1.6;
+    min-height: 500px;
+}
+.dte-preview__header {
+    text-align: center;
+    margin-bottom: 20px;
+    padding-bottom: 12px;
+    border-bottom: 1px solid #ccc;
+}
+.dte-preview__body {
+    min-height: 300px;
+}
+.dte-preview__footer {
+    margin-top: 32px;
+    padding-top: 12px;
+    border-top: 1px solid #ccc;
+    text-align: center;
+    font-size: 10pt;
+    color: #666;
+}
+
+/* ═══════ Mobile (<1024px): empilha 1 col ═══════ */
+@media (max-width: 1023px) {
+    .dte-cols {
+        grid-template-columns: 1fr;
+        overflow-y: auto;
+        align-items: start;
+    }
+    .dte-side,
+    .dte-main,
+    .dte-vars {
+        height: auto;
+    }
+    .dte-vars__list {
+        max-height: 320px;
+    }
+    .dte-preview {
+        padding: 12px;
+    }
+    .dte-preview__doc {
+        padding: 24px 18px;
+    }
+}
+</style>
+
 <template>
-    <div class="flex flex-col gap-3 xl:gap-4">
-        <!-- ══ Card: Identificação ══════════════════════════════ -->
-        <div class="rounded-md border border-[var(--surface-border,#e2e8f0)] bg-[var(--surface-card,#fff)] overflow-hidden">
-            <div class="flex items-center gap-2 px-4 py-3 border-b border-[var(--surface-border,#e2e8f0)]">
-                <i class="pi pi-tag text-[var(--text-color-secondary)] opacity-60" />
-                <span class="font-semibold text-sm">Identificação</span>
+    <div class="dte-page">
+        <!-- ══ Toggle Editor / Preview no topo ══════════════════ -->
+        <div class="dte-toolbar">
+            <div class="dte-toolbar__title">
+                <i class="pi pi-file-edit" />
+                <span>Conteúdo do documento</span>
             </div>
-            <div class="p-4 flex flex-col gap-3">
-                <div class="grid grid-cols-1 sm:grid-cols-[1fr_220px] gap-3">
-                    <div class="flex flex-col gap-1">
-                        <label class="text-xs font-semibold text-[var(--text-color-secondary)]">Nome do template</label>
+            <div class="dte-toolbar__tabs">
+                <Button
+                    label="Editor"
+                    icon="pi pi-pencil"
+                    :severity="activeTab === 'editor' ? undefined : 'secondary'"
+                    :outlined="activeTab !== 'editor'"
+                    size="small"
+                    class="rounded-full"
+                    @click="activeTab = 'editor'"
+                />
+                <Button
+                    label="Preview"
+                    icon="pi pi-eye"
+                    :severity="activeTab === 'preview' ? undefined : 'secondary'"
+                    :outlined="activeTab !== 'preview'"
+                    size="small"
+                    class="rounded-full"
+                    @click="activeTab = 'preview'"
+                />
+            </div>
+        </div>
+
+        <!-- ══ EDITOR — 3 colunas (form / editor / variáveis) ══ -->
+        <div v-show="activeTab === 'editor'" class="dte-cols">
+            <!-- ─── COL 1 (esquerda): Form de metadados ─── -->
+            <aside class="dte-side">
+                <div class="dte-side__head">
+                    <i class="pi pi-tag" />
+                    <span>Identificação</span>
+                </div>
+                <div class="dte-side__body">
+                    <div class="dte-field">
+                        <label>Nome do template</label>
                         <InputText v-model="form.nome_template" placeholder="Ex: Declaração de comparecimento" class="w-full" />
                     </div>
-                    <div class="flex flex-col gap-1">
-                        <label class="text-xs font-semibold text-[var(--text-color-secondary)]">Tipo</label>
+                    <div class="dte-field">
+                        <label>Tipo</label>
                         <Select v-model="form.tipo" :options="TIPOS_TEMPLATE" optionLabel="label" optionValue="value" class="w-full" />
                     </div>
-                </div>
-                <div class="flex flex-col gap-1">
-                    <label class="text-xs font-semibold text-[var(--text-color-secondary)]">Descrição</label>
-                    <InputText v-model="form.descricao" placeholder="Breve descrição do template" class="w-full" />
-                </div>
-                <div class="flex flex-col gap-1">
-                    <label class="text-xs font-semibold text-[var(--text-color-secondary)]">URL do logo (opcional)</label>
-                    <InputText v-model="form.logo_url" placeholder="https://..." class="w-full" />
-                </div>
-            </div>
-        </div>
-
-        <!-- ══ Card: Conteúdo ═══════════════════════════════════ -->
-        <div class="rounded-md border border-[var(--surface-border,#e2e8f0)] bg-[var(--surface-card,#fff)] overflow-hidden">
-            <div class="flex items-center justify-between gap-2 px-4 py-3 border-b border-[var(--surface-border,#e2e8f0)]">
-                <div class="flex items-center gap-2 min-w-0">
-                    <i class="pi pi-file-edit text-[var(--text-color-secondary)] opacity-60" />
-                    <span class="font-semibold text-sm">Conteúdo do documento</span>
-                </div>
-                <!-- Tabs: Editor / Preview -->
-                <div class="flex items-center gap-1">
-                    <Button
-                        :label="'Editor'"
-                        icon="pi pi-pencil"
-                        :severity="activeTab === 'editor' ? undefined : 'secondary'"
-                        :outlined="activeTab !== 'editor'"
-                        size="small"
-                        class="rounded-full"
-                        @click="activeTab = 'editor'"
-                    />
-                    <Button
-                        :label="'Preview'"
-                        icon="pi pi-eye"
-                        :severity="activeTab === 'preview' ? undefined : 'secondary'"
-                        :outlined="activeTab !== 'preview'"
-                        size="small"
-                        class="rounded-full"
-                        @click="activeTab = 'preview'"
-                    />
-                </div>
-            </div>
-
-            <!-- Editor -->
-            <div v-show="activeTab === 'editor'" class="p-4 flex flex-col lg:flex-row gap-4">
-                <!-- Campos HTML -->
-                <div class="flex-1 min-w-0 flex flex-col gap-3">
-                    <div class="flex flex-col gap-1" @focusin="cursorField = 'cabecalho_html'">
-                        <label class="text-xs font-semibold text-[var(--text-color-secondary)]">Cabeçalho</label>
-                        <JoditEmailEditor ref="editorCabecalho" v-model="form.cabecalho_html" :minHeight="120" layoutButtons :logoUrl="form.logo_url" />
+                    <div class="dte-field">
+                        <label>Descrição</label>
+                        <Textarea v-model="form.descricao" placeholder="Breve descrição do template" class="w-full" rows="3" autoResize />
                     </div>
-
-                    <div class="flex flex-col gap-1" @focusin="cursorField = 'corpo_html'">
-                        <label class="text-xs font-semibold text-[var(--text-color-secondary)]">Corpo do documento</label>
-                        <JoditEmailEditor ref="editorCorpo" v-model="form.corpo_html" :minHeight="350" />
-                    </div>
-
-                    <div class="flex flex-col gap-1" @focusin="cursorField = 'rodape_html'">
-                        <label class="text-xs font-semibold text-[var(--text-color-secondary)]">Rodapé</label>
-                        <JoditEmailEditor ref="editorRodape" v-model="form.rodape_html" :minHeight="120" layoutButtons :logoUrl="form.logo_url" />
+                    <div class="dte-field">
+                        <label>URL do logo (opcional)</label>
+                        <InputText v-model="form.logo_url" placeholder="https://..." class="w-full" />
                     </div>
                 </div>
+            </aside>
 
-                <!-- Painel de variáveis -->
-                <div class="w-full lg:w-[240px] shrink-0">
-                    <div class="lg:sticky lg:top-3 rounded-md border border-[var(--surface-border,#e2e8f0)] bg-[var(--surface-ground,#f8fafc)]/50 overflow-hidden">
-                        <div class="flex items-center gap-2 px-3 py-2 border-b border-[var(--surface-border,#e2e8f0)]">
-                            <i class="pi pi-code text-[var(--text-color-secondary)] opacity-60 text-xs" />
-                            <span class="font-semibold text-xs">Variáveis</span>
-                        </div>
-                        <div class="px-3 pt-2 text-[0.68rem] text-[var(--text-color-secondary)] opacity-75 italic">Clique para inserir no campo ativo</div>
-                        <div class="flex flex-col gap-3 p-3 max-h-[500px] overflow-y-auto">
-                            <div v-for="(vars, grupo) in variablesGrouped" :key="grupo">
-                                <div class="text-[0.62rem] font-semibold uppercase tracking-wider text-[var(--text-color-secondary)] mb-1">{{ grupo }}</div>
-                                <div class="flex flex-col gap-0.5">
-                                    <button
-                                        v-for="v in vars"
-                                        :key="v.key"
-                                        class="text-left text-xs px-2 py-1 rounded-md bg-transparent border-none hover:bg-[var(--primary-color,#6366f1)]/10 hover:text-[var(--primary-color,#6366f1)] transition-colors truncate cursor-pointer"
-                                        :title="v.key"
-                                        @click="insertVariable(v.key)"
-                                    >
-                                        <span class="font-mono text-[0.62rem] opacity-60">&lbrace;&lbrace;</span>
-                                        {{ v.label }}
-                                        <span class="font-mono text-[0.62rem] opacity-60">&rbrace;&rbrace;</span>
-                                    </button>
-                                </div>
-                            </div>
+            <!-- ─── COL 2 (centro): Tabs Cabeçalho/Corpo/Rodapé + editor ─── -->
+            <main class="dte-main">
+                <div class="dte-main__tabs">
+                    <button
+                        type="button"
+                        class="dte-tab"
+                        :class="{ 'is-active': editorTab === 'cabecalho' }"
+                        @click="editorTab = 'cabecalho'"
+                    >
+                        <i class="pi pi-align-left" />
+                        <span>Cabeçalho</span>
+                    </button>
+                    <button
+                        type="button"
+                        class="dte-tab"
+                        :class="{ 'is-active': editorTab === 'corpo' }"
+                        @click="editorTab = 'corpo'"
+                    >
+                        <i class="pi pi-align-justify" />
+                        <span>Corpo</span>
+                    </button>
+                    <button
+                        type="button"
+                        class="dte-tab"
+                        :class="{ 'is-active': editorTab === 'rodape' }"
+                        @click="editorTab = 'rodape'"
+                    >
+                        <i class="pi pi-align-center" />
+                        <span>Rodapé</span>
+                    </button>
+                </div>
+
+                <div class="dte-main__editor">
+                    <div v-show="editorTab === 'cabecalho'" class="dte-editor-wrap" @focusin="cursorField = 'cabecalho_html'">
+                        <JoditEmailEditor ref="editorCabecalho" v-model="form.cabecalho_html" :minHeight="450" layoutButtons :logoUrl="form.logo_url" />
+                    </div>
+                    <div v-show="editorTab === 'corpo'" class="dte-editor-wrap" @focusin="cursorField = 'corpo_html'">
+                        <JoditEmailEditor ref="editorCorpo" v-model="form.corpo_html" :minHeight="450" />
+                    </div>
+                    <div v-show="editorTab === 'rodape'" class="dte-editor-wrap" @focusin="cursorField = 'rodape_html'">
+                        <JoditEmailEditor ref="editorRodape" v-model="form.rodape_html" :minHeight="450" layoutButtons :logoUrl="form.logo_url" />
+                    </div>
+                </div>
+            </main>
+
+            <!-- ─── COL 3 (direita): Variáveis disponíveis ─── -->
+            <aside class="dte-vars">
+                <div class="dte-vars__head">
+                    <i class="pi pi-code" />
+                    <span>Variáveis</span>
+                </div>
+                <p class="dte-vars__hint">
+                    Clique para inserir no
+                    <strong>{{ editorTab === 'cabecalho' ? 'Cabeçalho' : editorTab === 'rodape' ? 'Rodapé' : 'Corpo' }}</strong>.
+                </p>
+                <div class="dte-vars__list">
+                    <div v-for="(vars, grupo) in variablesGrouped" :key="grupo" class="dte-vars__group">
+                        <div class="dte-vars__group-title">{{ grupo }}</div>
+                        <div class="dte-vars__group-items">
+                            <button
+                                v-for="v in vars"
+                                :key="v.key"
+                                class="dte-vars__btn"
+                                :title="v.key"
+                                @click="insertVariable(v.key)"
+                            >
+                                <span class="dte-vars__btn-brace">&lbrace;&lbrace;</span>
+                                <span class="dte-vars__btn-label">{{ v.label }}</span>
+                                <span class="dte-vars__btn-brace">&rbrace;&rbrace;</span>
+                            </button>
                         </div>
                     </div>
                 </div>
-            </div>
-
-            <!-- Preview -->
-            <div v-show="activeTab === 'preview'" class="p-4">
-                <div class="rounded-md border border-[var(--surface-border,#e2e8f0)] bg-white overflow-hidden">
-                    <div class="p-6 text-black" style="font-family: 'Segoe UI', Arial, sans-serif; font-size: 12pt; line-height: 1.6;">
-                        <div v-if="form.cabecalho_html" class="text-center mb-4 pb-3 border-b border-gray-300" v-html="renderedCabecalho" />
-                        <div class="min-h-[300px]" v-html="renderedPreview" />
-                        <div v-if="form.rodape_html" class="mt-8 pt-3 border-t border-gray-300 text-center text-[10pt] text-gray-500" v-html="renderedRodape" />
-                    </div>
-                </div>
-            </div>
+            </aside>
         </div>
 
+        <!-- ══ PREVIEW — full width ════════════════════════════ -->
+        <div v-show="activeTab === 'preview'" class="dte-preview">
+            <div class="dte-preview__doc">
+                <div v-if="form.cabecalho_html" class="dte-preview__header" v-html="renderedCabecalho" />
+                <div class="dte-preview__body" v-html="renderedPreview" />
+                <div v-if="form.rodape_html" class="dte-preview__footer" v-html="renderedRodape" />
+            </div>
+        </div>
     </div>
 </template>