diff --git a/slides/Stealth — Bitcoin Wallet Privacy Analyzer _ Stealth.pdf b/slides/Stealth — Bitcoin Wallet Privacy Analyzer _ Stealth.pdf
new file mode 100644
index 0000000..b3372b6
Binary files /dev/null and b/slides/Stealth — Bitcoin Wallet Privacy Analyzer _ Stealth.pdf differ
diff --git a/slides/package.json b/slides/package.json
index 3120b96..0833be3 100644
--- a/slides/package.json
+++ b/slides/package.json
@@ -10,5 +10,8 @@
   "dependencies": {
     "@slidev/cli": "^52.0.0",
     "@slidev/theme-default": "^0.25.0"
+  },
+  "devDependencies": {
+    "playwright-chromium": "^1.58.2"
   }
 }
diff --git a/slides/pnpm-lock.yaml b/slides/pnpm-lock.yaml
index ac4bcba..58fb7bd 100644
--- a/slides/pnpm-lock.yaml
+++ b/slides/pnpm-lock.yaml
@@ -10,10 +10,14 @@ importers:
     dependencies:
       '@slidev/cli':
         specifier: ^52.0.0
-        version: 52.13.0(@nuxt/kit@3.21.1)(@types/markdown-it@14.1.2)(@types/node@22.19.13)(@vue/compiler-sfc@3.5.29)(markdown-it@14.1.1)(postcss@8.5.6)
+        version: 52.13.0(@nuxt/kit@3.21.1)(@types/markdown-it@14.1.2)(@types/node@22.19.13)(@vue/compiler-sfc@3.5.29)(markdown-it@14.1.1)(playwright-chromium@1.58.2)(postcss@8.5.6)
       '@slidev/theme-default':
         specifier: ^0.25.0
         version: 0.25.0
+    devDependencies:
+      playwright-chromium:
+        specifier: ^1.58.2
+        version: 1.58.2
 
 packages:
 
@@ -2016,6 +2020,16 @@ packages:
   plantuml-encoder@1.4.0:
     resolution: {integrity: sha512-sxMwpDw/ySY1WB2CE3+IdMuEcWibJ72DDOsXLkSmEaSzwEUaYBT6DWgOfBiHGCux4q433X6+OEFWjlVqp7gL6g==}
 
+  playwright-chromium@1.58.2:
+    resolution: {integrity: sha512-SCoQ3hjBs7FfO46CoOtgAUg77BuYwCni1bzQgm47IUyLBTipnGkLxLnaUNRKXvPYO4hAyt8++Z6wVShVnhrzmw==}
+    engines: {node: '>=18'}
+    hasBin: true
+
+  playwright-core@1.58.2:
+    resolution: {integrity: sha512-yZkEtftgwS8CsfYo7nm0KE8jsvm6i/PTgVtB8DL726wNf6H2IMsDuxCpJj59KDaxCtSnrWan2AeDqM7JBaultg==}
+    engines: {node: '>=18'}
+    hasBin: true
+
   points-on-curve@0.2.0:
     resolution: {integrity: sha512-0mYKnYYe9ZcqMCWhUjItv/oHjvgEsfKvnUTg8sAtnHr3GVy7rGkXCb6d5cSyqrWqL4k81b9CPg3urd+T7aop3A==}
 
@@ -3168,7 +3182,7 @@ snapshots:
 
   '@shikijs/vscode-textmate@10.0.2': {}
 
-  '@slidev/cli@52.13.0(@nuxt/kit@3.21.1)(@types/markdown-it@14.1.2)(@types/node@22.19.13)(@vue/compiler-sfc@3.5.29)(markdown-it@14.1.1)(postcss@8.5.6)':
+  '@slidev/cli@52.13.0(@nuxt/kit@3.21.1)(@types/markdown-it@14.1.2)(@types/node@22.19.13)(@vue/compiler-sfc@3.5.29)(markdown-it@14.1.1)(playwright-chromium@1.58.2)(postcss@8.5.6)':
     dependencies:
       '@antfu/ni': 28.2.0
       '@antfu/utils': 9.3.0
@@ -3240,6 +3254,8 @@ snapshots:
       vue: 3.5.29(typescript@5.9.3)
       yaml: 2.8.2
       yargs: 18.0.0
+    optionalDependencies:
+      playwright-chromium: 1.58.2
     transitivePeerDependencies:
       - '@nuxt/kit'
       - '@svgr/core'
@@ -5074,6 +5090,12 @@ snapshots:
 
   plantuml-encoder@1.4.0: {}
 
+  playwright-chromium@1.58.2:
+    dependencies:
+      playwright-core: 1.58.2
+
+  playwright-core@1.58.2: {}
+
   points-on-curve@0.2.0: {}
 
   points-on-path@0.2.1:
diff --git a/slides/style.css b/slides/style.css
index 370256b..dbf1239 100644
--- a/slides/style.css
+++ b/slides/style.css
@@ -317,3 +317,16 @@ code {
 .seesaw-balanced .seesaw-side.light {
   transform: translateY(0) rotate(0deg);
 }
+
+/* PDF/export stability: avoid transparent gradient compositing artifacts */
+@media print {
+  .slidev-layout {
+    background: var(--bg) !important;
+  }
+
+  .panel,
+  .hero-wrap {
+    background: var(--surface) !important;
+    box-shadow: none !important;
+  }
+}