diff --git a/_includes/theme-init.html b/_includes/theme-init.html
new file mode 100644
index 0000000..100ded1
--- /dev/null
+++ b/_includes/theme-init.html
@@ -0,0 +1,16 @@
+<script>
+  (function() {
+    let saved = null;
+    try {
+      const candidate = localStorage.getItem('theme');
+      if (candidate === 'light' || candidate === 'dark') {
+        saved = candidate;
+      }
+    } catch (e) {
+      console.warn('Theme init: cannot access localStorage', e);
+    }
+    const theme = saved
+      ?? (window.matchMedia?.('(prefers-color-scheme: dark)')?.matches ? 'dark' : 'light');
+    document.documentElement.setAttribute('data-theme', theme);
+  })();
+</script>
diff --git a/_layouts/default.html b/_layouts/default.html
index 04400de..484e392 100644
--- a/_layouts/default.html
+++ b/_layouts/default.html
@@ -1,6 +1,7 @@
 <!DOCTYPE html>
 <html lang="en" class="no-js">
 <head>
+  {% include theme-init.html %}
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, initial-scale=1">
   <meta name="base-url" content="{{ site.baseurl }}">
diff --git a/_layouts/research.html b/_layouts/research.html
index b657dab..806e48e 100644
--- a/_layouts/research.html
+++ b/_layouts/research.html
@@ -1,6 +1,7 @@
 <!DOCTYPE html>
 <html lang="en" class="no-js">
 <head>
+  {% include theme-init.html %}
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, initial-scale=1">
   <meta name="base-url" content="{{ site.baseurl }}">
diff --git a/_layouts/teaching-course.html b/_layouts/teaching-course.html
index f465373..e762f48 100644
--- a/_layouts/teaching-course.html
+++ b/_layouts/teaching-course.html
@@ -1,6 +1,7 @@
 <!DOCTYPE html>
 <html lang="en" class="no-js">
 <head>
+  {% include theme-init.html %}
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, initial-scale=1">
   <meta name="base-url" content="{{ site.baseurl }}">
@@ -317,4 +318,4 @@
   </script>
 
 </body>
-</html> 
\ No newline at end of file
+</html>
\ No newline at end of file
diff --git a/_layouts/teaching.html b/_layouts/teaching.html
index 51f00b8..79bb2e2 100644
--- a/_layouts/teaching.html
+++ b/_layouts/teaching.html
@@ -1,6 +1,7 @@
 <!DOCTYPE html>
 <html lang="en" class="no-js">
 <head>
+  {% include theme-init.html %}
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, initial-scale=1">
   <meta name="base-url" content="{{ site.baseurl }}">
diff --git a/_layouts/team.html b/_layouts/team.html
index 2e1ed27..c3dc728 100644
--- a/_layouts/team.html
+++ b/_layouts/team.html
@@ -1,6 +1,7 @@
 <!DOCTYPE html>
 <html lang="en" class="no-js">
 <head>
+  {% include theme-init.html %}
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, initial-scale=1">
   <meta name="base-url" content="{{ site.baseurl }}">
diff --git a/_research/index.md b/_research/index.md
index 1c47bdb..12998c7 100644
--- a/_research/index.md
+++ b/_research/index.md
@@ -58,7 +58,7 @@ title: Research
 
 <h3 id="15">[15] <strong>Sanjay, V.</strong>, & Lohse, D. Unifying theory of scaling in drop impact: Forces & maximum spreading diameter. Phys. Rev. Lett., 134, 104003 (2025).</h3>
 
-<tags><span>Drops</span><span>Dissipative anomaly</span><span>Superamphiphobic-surfaces</span><span>Impact forces</span><span>Featured</span></tags>
+<tags><span>Drops</span><span>Dissipative anomaly</span><span>Superamphiphobic-surfaces</span><span>Impact forces</span></tags>
 
 [![PRL](https://img.shields.io/static/v1.svg?style=flat-square&label=PRL&message=OA&color=orange)](https://doi.org/10.1103/PhysRevLett.134.104003)
 [![arXiv](https://img.shields.io/static/v1.svg?style=flat-square&label=arXiv&message=2408.12714&color=green)](https://arxiv.org/abs/2408.12714)
@@ -124,7 +124,7 @@ title: Research
 
 <h3 id="11">[11] <strong>Sanjay, V.</strong>, Chantelot, P., & Lohse, D. When does an impacting drop stop bouncing? J. Fluid Mech., 958, A26 (2023).</h3>
 
-<tags><span>Drops</span><span>Bouncing</span><span>Dissipative anomaly</span></tags>
+<tags><span>Drops</span><span>Bouncing</span><span>Dissipative anomaly</span><span>Featured</span></tags>
 
 [![JFM](https://img.shields.io/static/v1.svg?style=flat-square&label=JFM&message=OA&color=orange)](https://doi.org/10.1017/jfm.2023.55)
 [![Blog](https://img.shields.io/badge/Blog-Coming%20Soon-yellow?style=flat-square&logo=obsidian&logoColor=white)](https://blogs.comphy-lab.org/0_ToDo-Blog-public)
