diff --git a/package-lock.json b/package-lock.json
index bba7f5a..d894d24 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -15,6 +15,7 @@
         "@angular/platform-browser": "^21.2.0",
         "@angular/router": "^21.2.0",
         "bootstrap": "^5.3.3",
+        "marked": "^18.0.4",
         "rxjs": "~7.8.0",
         "tslib": "^2.3.0"
       },
@@ -6181,6 +6182,18 @@
         "node": "^20.17.0 || >=22.9.0"
       }
     },
+    "node_modules/marked": {
+      "version": "18.0.4",
+      "resolved": "https://registry.npmjs.org/marked/-/marked-18.0.4.tgz",
+      "integrity": "sha512-c/BTaKzg0G6ezQx97DAkYU7k0HM6ys0FqYeKBL6hlBByZwy+ycA1+f0vDdjMHKKeEjdgkx0GOv9Il6D+85cOqA==",
+      "license": "MIT",
+      "bin": {
+        "marked": "bin/marked.js"
+      },
+      "engines": {
+        "node": ">= 20"
+      }
+    },
     "node_modules/math-intrinsics": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/math-intrinsics/-/math-intrinsics-1.1.0.tgz",
diff --git a/package.json b/package.json
index 7bef315..15712c2 100644
--- a/package.json
+++ b/package.json
@@ -18,6 +18,7 @@
     "@angular/platform-browser": "^21.2.0",
     "@angular/router": "^21.2.0",
     "bootstrap": "^5.3.3",
+    "marked": "^18.0.4",
     "rxjs": "~7.8.0",
     "tslib": "^2.3.0"
   },
diff --git a/src/app/issues/issue-detail/issue-detail.css b/src/app/issues/issue-detail/issue-detail.css
index 7c38889..27e530b 100644
--- a/src/app/issues/issue-detail/issue-detail.css
+++ b/src/app/issues/issue-detail/issue-detail.css
@@ -2,352 +2,172 @@
   display: block;
 }
 
-.page-header {
-  display: flex;
-  justify-content: space-between;
-  align-items: flex-start;
-  gap: 1rem;
-}
-
-.header-meta {
-  display: flex;
-  align-items: flex-start;
-  gap: 1rem;
-  flex-wrap: wrap;
-  justify-content: flex-end;
-}
-
-.status-inline {
-  display: flex;
-  align-items: center;
-  gap: 0.5rem;
-  background: #ffffff;
-  border: 1px solid #dbe4f0;
-  border-radius: 0.75rem;
-  padding: 0.5rem 0.75rem;
-}
-
-.status-label {
-  font-size: 0.875rem;
+/* Section headers */
+.section-header {
+  font-size: 0.7rem;
   font-weight: 700;
-  color: #374151;
+  text-transform: uppercase;
+  letter-spacing: 0.07em;
+  color: #6b7280;
+  background-color: #f9fafb;
 }
 
-.status-select {
-  min-width: 9rem;
-}
-
-.header-actions {
-  display: flex;
-  gap: 0.75rem;
-  flex-wrap: wrap;
-  justify-content: flex-end;
-}
-
-.page-header h1 {
-  margin: 0;
-  font-size: 2rem;
-}
-
-.page-header p {
-  margin: 0.5rem 0 1.5rem;
-  color: #4b5563;
-}
-
-.edit-button {
-  border: none;
-  border-radius: 0.5rem;
-  background-color: #2563eb;
-  color: #ffffff;
-  padding: 0.65rem 1rem;
+/* Field labels */
+.field-label {
+  display: block;
+  font-size: 0.78rem;
   font-weight: 600;
-  cursor: pointer;
+  color: #374151;
+  margin-bottom: 0.3rem;
 }
 
-.edit-button:hover {
-  background-color: #1d4ed8;
+/* Title input */
+.title-input::placeholder {
+  color: #9ca3af;
+  font-weight: 400;
 }
 
+/* More menu */
 .more-wrapper {
   position: relative;
 }
 
-.more-button {
-  border: 1px solid #d1d5db;
-  border-radius: 0.5rem;
-  background-color: #ffffff;
-  color: #374151;
-  padding: 0.65rem 1rem;
-  font-weight: 600;
-  cursor: pointer;
-}
-
-.more-button:hover {
-  background-color: #f9fafb;
-}
-
 .more-menu {
   position: absolute;
   right: 0;
-  top: calc(100% + 0.5rem);
+  top: calc(100% + 0.35rem);
   min-width: 10rem;
-  background: #ffffff;
-  border: 1px solid #e5e7eb;
-  border-radius: 0.75rem;
-  box-shadow: 0 10px 20px rgba(15, 23, 42, 0.08);
-  padding: 0.25rem;
   z-index: 10;
 }
 
-.more-menu-item {
-  width: 100%;
-  border: none;
-  background: transparent;
-  padding: 0.65rem 0.85rem;
-  border-radius: 0.5rem;
-  text-align: left;
-  font-weight: 600;
-  cursor: pointer;
-}
-
-.more-menu-item:hover {
-  background: #f3f4f6;
-}
-
-.delete-action {
-  color: #b91c1c;
-}
-
-.save-button {
-  border: none;
-  border-radius: 0.5rem;
-  background-color: #059669;
-  color: #ffffff;
-  padding: 0.65rem 1rem;
-  font-weight: 600;
-  cursor: pointer;
-}
-
-.save-button:hover {
-  background-color: #047857;
-}
-
-.cancel-button {
-  border: 1px solid #d1d5db;
-  border-radius: 0.5rem;
-  background-color: #ffffff;
-  color: #374151;
-  padding: 0.65rem 1rem;
-  font-weight: 600;
-  cursor: pointer;
-}
-
-.cancel-button:hover {
-  background-color: #f3f4f6;
-}
-
-.dependency-list {
-  list-style: none;
-  margin: 0 0 0.5rem;
-  padding: 0;
-  display: flex;
-  flex-direction: column;
-  gap: 0.35rem;
-}
-
-.dependency-item {
-  display: flex;
+/* Dependency badges */
+.dep-badge {
+  display: inline-flex;
   align-items: center;
-  justify-content: space-between;
-  gap: 0.5rem;
+  gap: 0.4rem;
   padding: 0.3rem 0.6rem;
+  background: #f3f4f6;
   border: 1px solid #e5e7eb;
-  border-radius: 0.4rem;
-  background: #f9fafb;
-}
-
-.dependency-label {
-  font-size: 0.875rem;
+  border-radius: 999px;
+  font-size: 0.85rem;
   color: #374151;
 }
 
-.dependency-remove {
-  flex-shrink: 0;
+.dep-id {
+  font-weight: 700;
+  color: #6b7280;
+  font-size: 0.78rem;
+}
+
+.dep-remove {
   border: none;
   background: transparent;
   color: #9ca3af;
-  font-size: 1.1rem;
+  font-size: 1rem;
   line-height: 1;
   cursor: pointer;
-  padding: 0 0.15rem;
-  border-radius: 0.25rem;
+  padding: 0;
+  border-radius: 50%;
+  width: 1.1rem;
+  height: 1.1rem;
+  display: flex;
+  align-items: center;
+  justify-content: center;
 }
 
-.dependency-remove:hover {
+.dep-remove:hover {
   color: #b91c1c;
   background: #fee2e2;
 }
 
-.dependency-add-btn {
-  margin-top: 0.25rem;
-}
-
-.dependency-add-row {
-  display: flex;
-  align-items: center;
-  gap: 0.5rem;
-  margin-top: 0.25rem;
-}
-
-.dependency-select {
+.dep-select {
   flex: 1;
+  min-width: 200px;
 }
 
-.epic-issues-card {
-  margin-top: 1rem;
-  background-color: #ffffff;
-  border: 1px solid #e5e7eb;
-  border-radius: 0.75rem;
-  padding: 1rem;
-}
-
-.epic-issues-header {
-  display: flex;
-  align-items: center;
-  justify-content: space-between;
-  gap: 1rem;
-  margin-bottom: 1rem;
-}
-
-.epic-issues-header h2 {
-  margin: 0;
-  font-size: 1.1rem;
-}
-
-.epic-issues-header span {
-  display: inline-flex;
-  align-items: center;
-  justify-content: center;
-  min-width: 2rem;
-  padding: 0.2rem 0.5rem;
-  border-radius: 999px;
-  background: #dbeafe;
-  color: #1d4ed8;
-  font-weight: 700;
-}
-
-.epic-empty {
-  margin: 0;
-  color: #6b7280;
-}
-
-.epic-issues-list {
-  list-style: none;
-  margin: 0;
-  padding: 0;
-  display: grid;
-  gap: 0.75rem;
-}
-
-.epic-issue-item {
-  display: flex;
-  justify-content: space-between;
-  gap: 1rem;
-  padding: 0.85rem 1rem;
-  border: 1px solid #e5e7eb;
-  border-radius: 0.75rem;
-  background: #f9fafb;
-}
-
-.epic-issue-item strong,
-.epic-issue-item p {
-  display: block;
-}
-
-.epic-issue-item p {
-  margin: 0.25rem 0 0;
-  color: #6b7280;
-}
-
-.epic-issue-item span {
-  color: #374151;
-  font-weight: 600;
-  white-space: nowrap;
-}
-
-.detail-card {
-  background-color: #ffffff;
-  border: 1px solid #e5e7eb;
-  border-radius: 0.75rem;
-  overflow: hidden;
-}
-
-table {
-  width: 100%;
-  border-collapse: collapse;
-}
-
-th,
-td {
-  padding: 0.9rem 1rem;
-  border-bottom: 1px solid #e5e7eb;
-  text-align: left;
-  vertical-align: top;
-}
-
-input,
-select,
-textarea {
-  width: 100%;
-  padding: 0.5rem 0.65rem;
-  border: 1px solid #d1d5db;
-  border-radius: 0.5rem;
-  font: inherit;
-  box-sizing: border-box;
-}
-
-textarea {
+/* Description */
+.description-textarea {
+  min-height: 40rem;
   resize: vertical;
 }
 
-th {
-  width: 220px;
-  background-color: #f9fafb;
+.description-preview {
+  min-height: 7rem;
+  white-space: pre-wrap;
+  font-size: 0.9rem;
+  color: #374151;
+  cursor: text;
+  border-radius: 0.375rem;
+  padding: 0.25rem 0.35rem;
+  line-height: 1.6;
+}
+
+.description-preview:hover {
+  background: #f9fafb;
+}
+
+.description-placeholder {
+  color: #9ca3af;
+}
+
+.markdown-body {
+  font-size: 0.9rem;
+  line-height: 1.7;
   color: #374151;
 }
 
-tr:last-child th,
-tr:last-child td {
-  border-bottom: none;
-}
-
-.form-actions {
+.markdown-body :is(h1, h2, h3, h4, h5, h6) {
   margin-top: 1rem;
-  display: flex;
-  justify-content: flex-end;
-  gap: 0.75rem;
+  margin-bottom: 0.4rem;
+  font-weight: 700;
+  line-height: 1.3;
 }
 
-@media (max-width: 768px) {
-  .page-header {
-    flex-direction: column;
-  }
+.markdown-body h1 { font-size: 1.4rem; }
+.markdown-body h2 { font-size: 1.2rem; }
+.markdown-body h3 { font-size: 1rem; }
 
-  .header-meta {
-    width: 100%;
-    justify-content: flex-start;
-  }
-
-  .status-inline {
-    width: 100%;
-  }
-
-  .status-select {
-    width: 100%;
-  }
-
-  th {
-    width: 40%;
-  }
+.markdown-body p {
+  margin-bottom: 0.6rem;
 }
 
+.markdown-body ul,
+.markdown-body ol {
+  padding-left: 1.4rem;
+  margin-bottom: 0.6rem;
+}
+
+.markdown-body code {
+  background: #f3f4f6;
+  border-radius: 0.25rem;
+  padding: 0.1em 0.35em;
+  font-size: 0.85em;
+}
+
+.markdown-body pre {
+  background: #f3f4f6;
+  border-radius: 0.4rem;
+  padding: 0.75rem 1rem;
+  overflow-x: auto;
+  margin-bottom: 0.6rem;
+}
+
+.markdown-body pre code {
+  background: none;
+  padding: 0;
+}
+
+.markdown-body blockquote {
+  border-left: 3px solid #d1d5db;
+  padding-left: 0.75rem;
+  color: #6b7280;
+  margin: 0 0 0.6rem;
+}
+
+.markdown-body a {
+  color: #2563eb;
+}
+
+.markdown-body > *:last-child {
+  margin-bottom: 0;
+}
diff --git a/src/app/issues/issue-detail/issue-detail.html b/src/app/issues/issue-detail/issue-detail.html
index c170c62..9bbf291 100644
--- a/src/app/issues/issue-detail/issue-detail.html
+++ b/src/app/issues/issue-detail/issue-detail.html
@@ -1,172 +1,194 @@
 <!-- suppress HtmlUnknownAttribute -->
-<header class="page-header mb-4">
-  <div>
-    <h1>Detail de l'issue</h1>
-    <p>Informations de creation et de suivi de l'issue.</p>
+
+<!-- Top bar -->
+<div class="d-flex align-items-center justify-content-between flex-wrap gap-2 mb-3">
+  <div class="d-flex align-items-center gap-2">
+    <span [class]="'badge ' + typeBadgeClass">{{ issue.type }}</span>
+    <span class="text-secondary fw-semibold small">#{{ issue.id }}</span>
   </div>
-  <div class="header-meta d-flex align-items-start gap-3 flex-wrap justify-content-end">
-    <div class="status-inline d-flex align-items-center gap-2 bg-white border rounded-3 px-3 py-2 shadow-sm">
-      <span class="status-label">Status</span>
-      <select
-        aria-label="Status"
-        class="status-select form-select form-select-sm w-auto"
-        [ngModel]="issue.status"
-        (ngModelChange)="updateStatus($event)"
-      >
-        @for (status of statusOptions; track status) {
-          <option [value]="status">{{ status }}</option>
-        }
-      </select>
-    </div>
-
-    <div class="header-actions d-flex gap-2 flex-wrap justify-content-end">
-      <div class="more-wrapper">
-        <button type="button" class="more-button btn btn-outline-secondary btn-sm dropdown-toggle" (click)="toggleMoreMenu()">More</button>
-
-        @if (moreMenuOpen) {
-          <div class="more-menu dropdown-menu show position-absolute end-0 mt-2 p-1 shadow">
-            <button type="button" class="more-menu-item delete-action dropdown-item text-danger" (click)="deleteIssue()">
-              Supprimer
-            </button>
-          </div>
-        }
-      </div>
+  <div class="d-flex align-items-center gap-2">
+    <select
+      aria-label="Status"
+      class="form-select form-select-sm w-auto"
+      [ngModel]="issue.status"
+      (ngModelChange)="updateStatus($event)"
+    >
+      @for (status of statusOptions; track status) {
+        <option [value]="status">{{ status }}</option>
+      }
+    </select>
+    <div class="more-wrapper">
+      <button type="button" class="btn btn-outline-secondary btn-sm" (click)="toggleMoreMenu()">···</button>
+      @if (moreMenuOpen) {
+        <div class="more-menu dropdown-menu show">
+          <button type="button" class="dropdown-item text-danger" (click)="deleteIssue()">Supprimer</button>
+        </div>
+      }
     </div>
   </div>
-</header>
+</div>
 
-<section class="detail-card card shadow-sm" aria-label="Informations de l'issue">
-  <table class="table table-borderless align-middle mb-0">
-    <tbody>
-      <tr>
-        <th>ID</th>
-        <td>{{ issue.id }}</td>
-      </tr>
-      <tr>
-        <th>Nom</th>
-        <td>
-          <input aria-label="Nom" class="form-control form-control-sm" type="text" [(ngModel)]="issue.name" (blur)="saveIssue()" />
-        </td>
-      </tr>
-      <tr>
-        <th>Type</th>
-        <td>
+<!-- Titre -->
+<div class="card shadow-sm mb-3">
+  <div class="card-body py-2">
+    <input
+      aria-label="Titre"
+      class="title-input form-control border-0 shadow-none p-0 fw-semibold fs-5"
+      type="text"
+      placeholder="Titre de l'issue..."
+      [(ngModel)]="issue.name"
+      (blur)="saveIssue()"
+    />
+  </div>
+</div>
+
+<!-- Détails + Planning -->
+<div class="row g-3 mb-3">
+  <div class="col-md-5">
+    <div class="card shadow-sm h-100">
+      <div class="card-header section-header">Détails</div>
+      <div class="card-body d-flex flex-column gap-3">
+        <div>
+          <label class="field-label">Type</label>
           <select aria-label="Type" class="form-select form-select-sm" [(ngModel)]="issueTypeValue" (change)="saveIssue()">
             @for (type of typeOptions; track type) {
               <option [value]="type">{{ type }}</option>
             }
           </select>
-        </td>
-      </tr>
-      @if (!isEpicIssue) {
-        <tr>
-          <th>Epic</th>
-          <td>
-            <select aria-label="Epic" class="form-select form-select-sm" [(ngModel)]="issue.epic" (change)="saveIssue()">
-              <option value="">-</option>
-              @for (epicIssue of epicIssues; track epicIssue.id) {
-                <option [value]="epicIssue.name">{{ epicIssue.name }}</option>
-              }
-            </select>
-          </td>
-        </tr>
-      }
-      <tr>
-        <th>Depend de</th>
-        <td>
-          @if (dependencyIds.length > 0) {
-            <ul class="dependency-list">
-              @for (depId of dependencyIds; track depId) {
-                <li class="dependency-item">
-                  <span class="dependency-label">#{{ depId }} - {{ resolveDependency(depId)?.name || 'Sans nom' }}</span>
-                  <button type="button" class="dependency-remove" (click)="removeDependency(depId)" title="Supprimer">×</button>
-                </li>
-              }
-            </ul>
-          }
-          @if (showAddDependency) {
-            <div class="dependency-add-row">
-              <select aria-label="Choisir une dépendance" class="form-select form-select-sm dependency-select" [(ngModel)]="selectedCandidateId">
-                <option [ngValue]="null">Choisir une issue...</option>
-                @for (candidate of availableCandidates; track candidate.id) {
-                  <option [ngValue]="candidate.id">#{{ candidate.id }} - {{ candidate.name || 'Sans nom' }}</option>
-                }
-              </select>
-              <button type="button" class="btn btn-sm btn-primary" (click)="confirmAddDependency()" [disabled]="selectedCandidateId === null">Ajouter</button>
-              <button type="button" class="btn btn-sm btn-outline-secondary" (click)="cancelAddDependency()">Annuler</button>
-            </div>
-          } @else {
-            <button type="button" class="btn btn-sm btn-outline-primary dependency-add-btn" (click)="openAddDependency()">+ Ajouter une dépendance</button>
-          }
-        </td>
-      </tr>
-      <tr>
-        <th>Assignee</th>
-        <td>
-          <input aria-label="Assignee" class="form-control form-control-sm" type="text" [(ngModel)]="issue.assignee" (blur)="saveIssue()" />
-        </td>
-      </tr>
-      <tr>
-        <th>Date d'echeance</th>
-        <td>
-          <input aria-label="Date d'échéance" class="form-control form-control-sm" type="date" [(ngModel)]="issue.dueDate" (blur)="saveIssue()" />
-        </td>
-      </tr>
-      <tr>
-        <th>Temps estimé</th>
-        <td>
-          <input aria-label="Temps estimé" class="form-control form-control-sm" type="number" min="0" step="0.5" [(ngModel)]="estimatedTimeValue" (blur)="saveIssue()" />
-        </td>
-      </tr>
-      <tr>
-        <th>Description</th>
-        <td>
-          <textarea aria-label="Description" class="form-control form-control-sm" rows="4" [(ngModel)]="issue.description" (blur)="saveIssue()"></textarea>
-        </td>
-      </tr>
-      <tr>
-        <th>Priorite</th>
-        <td>
+        </div>
+        <div>
+          <label class="field-label">Priorité</label>
           <select aria-label="Priorité" class="form-select form-select-sm" [(ngModel)]="issue.priority" (change)="saveIssue()">
             <option value="Basse">Basse</option>
             <option value="Moyenne">Moyenne</option>
             <option value="Haute">Haute</option>
           </select>
-        </td>
-      </tr>
-      <tr>
-        <th>Progression</th>
-        <td>
-          <input aria-label="Progression" class="form-control form-control-sm" type="number" min="0" max="100" [(ngModel)]="issue.progress" (blur)="saveIssue()" />
-        </td>
-      </tr>
-    </tbody>
-  </table>
-</section>
-
-@if (isEpicIssue) {
-  <section class="epic-issues-card card shadow-sm mt-4" aria-label="Issues composant cet epic">
-    <div class="epic-issues-header card-header d-flex align-items-center justify-content-between">
-      <h2 class="h5 mb-0">Issues composant cet Epic</h2>
-      <span class="badge text-bg-primary">{{ composedIssues.length }}</span>
+        </div>
+        @if (!isEpicIssue) {
+          <div>
+            <label class="field-label">Epic</label>
+            <select aria-label="Epic" class="form-select form-select-sm" [(ngModel)]="issue.epic" (change)="saveIssue()">
+              <option value="">—</option>
+              @for (epicIssue of epicIssues; track epicIssue.id) {
+                <option [value]="epicIssue.name">{{ epicIssue.name }}</option>
+              }
+            </select>
+          </div>
+        }
+      </div>
     </div>
+  </div>
 
-    @if (composedIssues.length === 0) {
-      <div class="card-body">
-        <p class="epic-empty mb-0 text-secondary">Aucune issue ne compose encore cet Epic.</p>
+  <div class="col-md-7">
+    <div class="card shadow-sm h-100">
+      <div class="card-header section-header">Planning</div>
+      <div class="card-body d-flex flex-column gap-3">
+        <div>
+          <label class="field-label">Assignee</label>
+          <input aria-label="Assignee" class="form-control form-control-sm" type="text" [(ngModel)]="issue.assignee" (blur)="saveIssue()" />
+        </div>
+        <div>
+          <label class="field-label">Date d'échéance</label>
+          <input aria-label="Date d'échéance" class="form-control form-control-sm" type="date" [(ngModel)]="issue.dueDate" (blur)="saveIssue()" />
+        </div>
+        <div class="row g-2">
+          <div class="col-6">
+            <label class="field-label">Temps estimé (h)</label>
+            <input aria-label="Temps estimé" class="form-control form-control-sm" type="number" min="0" step="0.5" [(ngModel)]="estimatedTimeValue" (blur)="saveIssue()" />
+          </div>
+          <div class="col-6">
+            <label class="field-label">Progression (%)</label>
+            <input aria-label="Progression" class="form-control form-control-sm" type="number" min="0" max="100" [(ngModel)]="issue.progress" (blur)="saveIssue()" />
+          </div>
+        </div>
+      </div>
+    </div>
+  </div>
+</div>
+
+<!-- Description -->
+<div class="card shadow-sm mb-3">
+  <div class="card-header section-header">Description</div>
+  <div class="card-body">
+    @if (editingDescription) {
+      <textarea
+        aria-label="Description"
+        class="form-control border-0 shadow-none p-0 description-textarea"
+        placeholder="Ajouter une description..."
+        [(ngModel)]="issue.description"
+        (blur)="editingDescription = false; saveIssue()"
+      ></textarea>
+    } @else {
+      <div
+        class="description-preview"
+        (click)="editingDescription = true"
+        title="Cliquer pour éditer"
+      >
+        @if (issue.description) {
+          <div class="markdown-body" [innerHTML]="descriptionHtml"></div>
+        } @else {
+          <span class="description-placeholder">Ajouter une description...</span>
+        }
+      </div>
+    }
+  </div>
+</div>
+
+<!-- Dépendances -->
+<div class="card shadow-sm mb-3">
+  <div class="card-header section-header">Dépendances</div>
+  <div class="card-body">
+    @if (dependencyIds.length > 0) {
+      <div class="d-flex flex-wrap gap-2 mb-3">
+        @for (depId of dependencyIds; track depId) {
+          <span class="dep-badge">
+            <span class="dep-id">#{{ depId }}</span>
+            {{ resolveDependency(depId)?.name || 'Sans nom' }}
+            <button type="button" class="dep-remove" (click)="removeDependency(depId)" title="Supprimer">×</button>
+          </span>
+        }
+      </div>
+    }
+    @if (showAddDependency) {
+      <div class="d-flex gap-2 flex-wrap">
+        <select aria-label="Choisir une dépendance" class="form-select form-select-sm dep-select" [(ngModel)]="selectedCandidateId">
+          <option [ngValue]="null">Choisir une issue...</option>
+          @for (candidate of availableCandidates; track candidate.id) {
+            <option [ngValue]="candidate.id">#{{ candidate.id }} – {{ candidate.name || 'Sans nom' }}</option>
+          }
+        </select>
+        <button type="button" class="btn btn-sm btn-primary text-nowrap" (click)="confirmAddDependency()" [disabled]="selectedCandidateId === null">Ajouter</button>
+        <button type="button" class="btn btn-sm btn-outline-secondary text-nowrap" (click)="cancelAddDependency()">Annuler</button>
       </div>
     } @else {
-      <ul class="epic-issues-list list-group list-group-flush">
+      <button type="button" class="btn btn-sm btn-outline-primary" (click)="openAddDependency()">+ Ajouter une dépendance</button>
+    }
+  </div>
+</div>
+
+<!-- Issues de l'epic -->
+@if (isEpicIssue) {
+  <div class="card shadow-sm">
+    <div class="card-header d-flex align-items-center justify-content-between section-header">
+      <span>Issues composant cet Epic</span>
+      <span class="badge text-bg-primary">{{ composedIssues.length }}</span>
+    </div>
+    @if (composedIssues.length === 0) {
+      <div class="card-body">
+        <p class="text-secondary mb-0 small">Aucune issue ne compose encore cet Epic.</p>
+      </div>
+    } @else {
+      <ul class="list-group list-group-flush">
         @for (composedIssue of composedIssues; track composedIssue.id) {
-          <li class="epic-issue-item list-group-item d-flex justify-content-between align-items-start gap-3">
-            <div class="grow">
-              <strong>#{{ composedIssue.id }} - {{ composedIssue.name || 'Sans nom' }}</strong>
-              <p class="mb-0 text-secondary">{{ composedIssue.type }} · {{ composedIssue.status }}</p>
+          <li class="list-group-item d-flex justify-content-between align-items-center gap-3 py-3">
+            <div>
+              <p class="mb-0 fw-semibold">#{{ composedIssue.id }} – {{ composedIssue.name || 'Sans nom' }}</p>
+              <p class="mb-0 text-secondary small">{{ composedIssue.type }} · {{ composedIssue.status }}</p>
             </div>
-            <span class="text-secondary fw-semibold text-nowrap">{{ composedIssue.assignee || 'Non assigné' }}</span>
+            <span class="text-secondary small text-nowrap">{{ composedIssue.assignee || 'Non assigné' }}</span>
           </li>
         }
       </ul>
     }
-  </section>
+  </div>
 }
diff --git a/src/app/issues/issue-detail/issue-detail.ts b/src/app/issues/issue-detail/issue-detail.ts
index 7fab680..1a54eac 100644
--- a/src/app/issues/issue-detail/issue-detail.ts
+++ b/src/app/issues/issue-detail/issue-detail.ts
@@ -1,6 +1,8 @@
 import { Component, inject } from '@angular/core';
 import { FormsModule } from '@angular/forms';
+import { DomSanitizer, SafeHtml } from '@angular/platform-browser';
 import { ActivatedRoute, Router } from '@angular/router';
+import { marked } from 'marked';
 import { IssueEntity, IssuesStore } from '../issues.store';
 
 @Component({
@@ -13,6 +15,7 @@ export class IssueDetail {
   private readonly route = inject(ActivatedRoute);
   private readonly router = inject(Router);
   private readonly issuesStore = inject(IssuesStore);
+  private readonly sanitizer = inject(DomSanitizer);
   private readonly isNewIssueRoute = this.route.snapshot.routeConfig?.path === 'issues/new';
 
   protected issue: IssueEntity = this.buildIssue();
@@ -20,6 +23,7 @@ export class IssueDetail {
   protected moreMenuOpen = false;
   protected showAddDependency = false;
   protected selectedCandidateId: number | null = null;
+  protected editingDescription = false;
 
   protected readonly statusOptions: IssueEntity['status'][] = [
     'draft',
@@ -107,6 +111,23 @@ export class IssueDetail {
     return this.issueTypeValue === 'Epic';
   }
 
+  protected get descriptionHtml(): SafeHtml {
+    const html = marked.parse(this.issue.description || '') as string;
+    return this.sanitizer.bypassSecurityTrustHtml(html);
+  }
+
+  protected get typeBadgeClass(): string {
+    const map: Record<IssueEntity['type'], string> = {
+      Bug: 'text-bg-danger',
+      Study: 'text-bg-secondary',
+      Story: 'text-bg-success',
+      Task: 'text-bg-primary',
+      'Technical Story': 'text-bg-warning',
+      Epic: 'text-bg-info',
+    };
+    return map[this.issueTypeValue] ?? 'text-bg-secondary';
+  }
+
   protected saveIssue(): void {
     this.issuesStore.upsert(this.issue);
     if (this.isNewIssueRoute) {