diff --git a/network-poc/static/index.html b/network-poc/static/index.html
index 2fa6b5d..6048efb 100644
--- a/network-poc/static/index.html
+++ b/network-poc/static/index.html
@@ -1905,11 +1905,15 @@
         }
 
         // Projektikortti: tiedostovälilehdet + kopioi + lataa ZIP
+        // Globaali storage projektikorttien tiedostoille (välttää JSON data-attribuuttien ongelmat)
+        const projectFiles = {};
+
         function renderProjectCard(files, projectName) {
             const fileEntries = Object.entries(files);
             if (fileEntries.length === 0) return;
 
             const cardId = 'proj-' + Date.now();
+            projectFiles[cardId] = files;
             const tabsHtml = fileEntries.map(([name], i) =>
                 `<span class="proj-tab" data-card="${cardId}" data-idx="${i}" style="padding:4px 10px;cursor:pointer;border-radius:4px 4px 0 0;font-size:12px;${i === 0 ? 'background:#161b22;color:#58a6ff;border:1px solid #30363d;border-bottom:none' : 'color:#8b949e'}" onclick="switchProjectTab('${cardId}',${i})">${esc(name)}</span>`
             ).join('');
@@ -1926,7 +1930,7 @@
             const allText = fileEntries.map(([name, code]) => `# --- ${name} ---\n${code}`).join('\n\n');
 
             const cardHtml = `
-                <div id="${cardId}" style="margin:8px 0;border:1px solid #30363d;border-radius:6px;background:#161b22;overflow:hidden" data-files='${esc(JSON.stringify(files))}'>
+                <div id="${cardId}" style="margin:8px 0;border:1px solid #30363d;border-radius:6px;background:#161b22;overflow:hidden">
                     <div style="display:flex;align-items:center;justify-content:space-between;padding:8px 12px;background:#0d1117;border-bottom:1px solid #30363d">
                         <span style="color:#a371f7;font-weight:600;font-size:13px">${esc(projectName || 'Projekti')} <span style="color:#8b949e;font-weight:normal">(${fileEntries.length} tiedostoa)</span></span>
                         <span style="display:flex;gap:6px">
@@ -1960,7 +1964,7 @@
         window.copyFileContent = function(cardId, idx) {
             const card = document.getElementById(cardId);
             if (!card) return;
-            const files = JSON.parse(card.dataset.files);
+            const files = projectFiles[cardId];
             const entries = Object.entries(files);
             if (entries[idx]) {
                 navigator.clipboard.writeText(entries[idx][1]);
@@ -1973,7 +1977,7 @@
         window.copyAllFiles = function(cardId) {
             const card = document.getElementById(cardId);
             if (!card) return;
-            const files = JSON.parse(card.dataset.files);
+            const files = projectFiles[cardId];
             const text = Object.entries(files).map(([name, code]) => `# --- ${name} ---\n${code}`).join('\n\n');
             navigator.clipboard.writeText(text);
             const btn = card.querySelector('[onclick*="copyAllFiles"]');
@@ -1983,7 +1987,7 @@
         window.downloadZip = async function(cardId) {
             const card = document.getElementById(cardId);
             if (!card) return;
-            const files = JSON.parse(card.dataset.files);
+            const files = projectFiles[cardId];
 
             // Luodaan ZIP ilman ulkoisia kirjastoja (yksinkertainen uncompressed ZIP)
             const entries = Object.entries(files);