diff --git a/webui/html/assets/css/app.css b/webui/html/assets/css/app.css
index bb5941e..915b678 100644
--- a/webui/html/assets/css/app.css
+++ b/webui/html/assets/css/app.css
@@ -250,6 +250,7 @@ header{
 .btn:hover{background: var(--btn2)}
 .btn:active{transform: translateY(1px)}
 .btn.small{padding:7px 9px; border-radius: 10px}
+.btn.tiny{padding:1px 5px; border-radius: 4px; font-size:11px; line-height:16px;}
 .btn.ghost{background: transparent}
 .btn.ok{border-color: rgba(45,212,191,.6)}
 .btn.bad{border-color: rgba(251,113,133,.6)}
@@ -643,29 +644,30 @@ pre{
     .sidebar .navLabel { display: none; }
     .sidebar .tab { justify-content: center; }
 }
-/* Files tree (Portainer-ish) */
+/* Files tree (IDE sidebar stijl) */
 .file-folder-row{
     display:flex;
     align-items:center;
     justify-content:space-between;
-    gap:10px;
+    gap:6px;
     cursor:pointer;
     user-select:none;
 
-    padding: 10px 12px;
-    border: 1px solid var(--card-border);
-    border-radius: 12px;
-    background: var(--folder-bg);
-    transition: background .12s ease, border-color .12s ease, transform .06s ease;
+    padding: 2px 6px;
+    border: none;
+    border-radius: 4px;
+    background: transparent;
+    transition: background .1s ease;
+    line-height: 22px;
+    font-weight: 600;
 }
 
 .file-folder-row:hover{
     background: var(--folder-hover);
-    border-color: rgba(96,165,250,.35);
 }
 
-.file-folder-row:active{
-    transform: translateY(1px);
+.file-entry:hover{
+    background: var(--folder-hover);
 }
 
 .file-folder-left{
@@ -697,19 +699,19 @@ pre{
 
 .file-folder-files{
     margin-left: 0;
-    margin-top: 6px;
-    padding-left: 12px;
-    border-left: 1px dashed var(--soft-line);
+    margin-top: 0;
+    padding-left: 0;
+    border-left: none;
 }
 
 .file-entry{
     display:flex;
     align-items:center;
     justify-content:space-between;
-    gap:10px;
-    padding:4px 0;
-    border-bottom:1px dashed var(--soft-line);
-    border-radius: 8px;
+    gap:6px;
+    padding: 2px 6px;
+    border-radius: 4px;
+    line-height: 22px;
 }
 .file-entry-name{
     cursor:pointer;
diff --git a/webui/html/assets/js/tabs/files.js b/webui/html/assets/js/tabs/files.js
index 95298d0..f264e67 100644
--- a/webui/html/assets/js/tabs/files.js
+++ b/webui/html/assets/js/tabs/files.js
@@ -21,9 +21,10 @@ function filesSetEditorTheme(themeName) {
 
 window.filesSetEditorTheme = filesSetEditorTheme;
 
-function _isFolderCollapsed(folderKey) {
-  return localStorage.getItem('files_folder_collapsed:' + folderKey) !== '0';
-  // default collapsed = true
+function _isFolderCollapsed(folderKey, level) {
+  const stored = localStorage.getItem('files_folder_collapsed:' + folderKey);
+  if (stored !== null) return stored !== '0';
+  return true; // standaard alles ingeklapt
 }
 
 function _setFolderCollapsed(folderKey, v) {
@@ -246,37 +247,26 @@ async function filesRefresh() {
 
   function renderNode(node, level) {
     const folderKey = node.apiPath;
-    const collapsed = _isFolderCollapsed(folderKey);
+    const collapsed = _isFolderCollapsed(folderKey, level);
     const label = node.uiPath || 'root';
     const indent = Math.max(0, level) * 14;
 
     const folder = folderByPath.get(folderKey);
     const files = (folder && folder.files) ? folder.files : [];
-
-    // subfolders (NU AL beschikbaar voor de badges)
     const childNames = Array.from(node.children.keys()).sort((a,b) => a.localeCompare(b));
-
-    // files (NU AL beschikbaar voor de badges)
     const sortedFiles = (files || []).slice().sort((a,b) => a.localeCompare(b));
 
     const out = [];
-    out.push(`
-      <div class="mono file-folder-row" data-folder="${esc(folderKey)}" style="margin:${level === 0 ? '8px' : '6px'} 0 6px 0; padding-left:${indent}px; font-weight:600;">
-        <span class="file-folder-left">
-          <span class="folder-toggle">${collapsed ? '▶' : '▼'}</span>
-          <span>📂 ${esc(label)}</span>
-        </span>
-        <span class="file-folder-meta" onclick="event.stopPropagation();">
-          <span class="file-badge" title="Subfolders in deze map">📁 ${childNames.length}</span>
-          <span class="file-badge" title="Bestanden in deze map">📄 ${sortedFiles.length}</span>
-
-          <span class="flex file-folder-actions">
-            <button class="btn small ok" title="Nieuw bestand in ${esc(label)}" onclick="filesNewFileInFolder(decodeURIComponent('${encodeURIComponent(node.uiPath)}'))">+</button>
-            <button class="btn small bad" title="Verwijder map (alleen als leeg)" onclick="filesDeleteFolder(decodeURIComponent('${encodeURIComponent(node.uiPath)}'))">🗑️</button>
-          </span>
-        </span>
-      </div>
-    `);
+    out.push(`<div class="mono file-folder-row" data-folder="${esc(folderKey)}" style="padding-left:${indent}px;">
+      <span class="file-folder-left">
+        <span class="folder-toggle">${collapsed ? '▶' : '▼'}</span>
+        <span>📂 ${esc(label)}</span>
+      </span>
+      <span class="file-folder-actions" onclick="event.stopPropagation();">
+        <button class="btn tiny ok" title="Nieuw bestand in ${esc(label)}" onclick="filesNewFileInFolder(decodeURIComponent('${encodeURIComponent(node.uiPath)}'))">+</button>
+        <button class="btn tiny bad" title="Verwijder map (alleen als leeg)" onclick="filesDeleteFolder(decodeURIComponent('${encodeURIComponent(node.uiPath)}'))">✕</button>
+      </span>
+    </div>`);
 
     out.push(`<div class="file-folder-files" data-folder-files="${esc(folderKey)}" style="${collapsed ? 'display:none;' : ''}">`);
 
@@ -287,16 +277,14 @@ async function filesRefresh() {
     for (const f of sortedFiles) {
       const fullUi = node.uiPath ? `${node.uiPath}/${f}` : f;
       const fileKey = encodeURIComponent(fullUi);
-      out.push(`
-        <div class="file-entry" data-file="${fileKey}" style="padding-left:${indent + 18}px;">
-          <span class="mono file-entry-name" onclick="filesOpen(decodeURIComponent('${fileKey}'))">📄 ${esc(f)}</span>
-          <span class="file-entry-state"></span>
-        </div>
-      `);
+      out.push(`<div class="file-entry" data-file="${fileKey}" style="padding-left:${indent + 16}px;">
+        <span class="mono file-entry-name" onclick="filesOpen(decodeURIComponent('${fileKey}'))">📄 ${esc(f)}</span>
+        <span class="file-entry-state"></span>
+      </div>`);
     }
 
     if (!childNames.length && !sortedFiles.length) {
-      out.push(`<div class="muted" style="padding-left:${indent + 18}px;">(leeg)</div>`);
+      out.push(`<div class="muted" style="padding-left:${indent + 16}px; font-size:0.85em;">(leeg)</div>`);
     }
 
     out.push(`</div>`);
@@ -311,30 +299,25 @@ async function filesRefresh() {
   const rootFolder = folderByPath.get(FILES_ROOT);
   if (rootFolder && (rootFolder.files || []).length) {
     const folderKey = FILES_ROOT;
-    const collapsed = _isFolderCollapsed(folderKey);
-    parts.unshift(`
-      <div class="mono file-folder-row" data-folder="${esc(folderKey)}" style="margin:8px 0 6px 0; font-weight:600;">
-        <span class="file-folder-left">
-          <span class="folder-toggle">${collapsed ? '▶' : '▼'}</span>
-          <span>📂 root</span>
-        </span>
-        <span class="flex" onclick="event.stopPropagation();">
-          <button class="btn small ok" title="Nieuw bestand in root" onclick="filesNewFileInFolder('')">+</button>
-        </span>
-      </div>
-      <div class="file-folder-files" data-folder-files="${esc(folderKey)}" style="${collapsed ? 'display:none;' : ''}">
-        ${(rootFolder.files || []).slice().sort((a,b)=>a.localeCompare(b)).map(f => {
-          const fullUi = f;
-          const fileKey = encodeURIComponent(fullUi);
-          return `
-            <div class="file-entry" data-file="${fileKey}" style="padding-left:18px;">
-              <span class="mono file-entry-name" style="cursor:pointer" onclick="filesOpen(decodeURIComponent('${fileKey}'))">📄 ${esc(f)}</span>
-              <span class="file-entry-state"></span>
-            </div>
-          `;
-        }).join('')}
-      </div>
-    `);
+    const collapsed = _isFolderCollapsed(folderKey, 0);
+    parts.unshift(`<div class="mono file-folder-row" data-folder="${esc(folderKey)}">
+      <span class="file-folder-left">
+        <span class="folder-toggle">${collapsed ? '▶' : '▼'}</span>
+        <span>📂 root</span>
+      </span>
+      <span class="file-folder-actions" onclick="event.stopPropagation();">
+        <button class="btn tiny ok" title="Nieuw bestand in root" onclick="filesNewFileInFolder('')">+</button>
+      </span>
+    </div>
+    <div class="file-folder-files" data-folder-files="${esc(folderKey)}" style="${collapsed ? 'display:none;' : ''}">
+      ${(rootFolder.files || []).slice().sort((a,b)=>a.localeCompare(b)).map(f => {
+        const fileKey = encodeURIComponent(f);
+        return `<div class="file-entry" data-file="${fileKey}" style="padding-left:16px;">
+          <span class="mono file-entry-name" onclick="filesOpen(decodeURIComponent('${fileKey}'))">📄 ${esc(f)}</span>
+          <span class="file-entry-state"></span>
+        </div>`;
+      }).join('')}
+    </div>`);
   }
 
   treeEl.innerHTML = parts.join('');