diff --git a/stamina/css/plain-style.css b/stamina/css/plain-style.css
index fb53191..f846db1 100644
--- a/stamina/css/plain-style.css
+++ b/stamina/css/plain-style.css
@@ -11,3 +11,77 @@ border: 3px solid gray;
 background-color: #F8F8F8;
 font-size: 18pt;
 }
+
+.header-banner {
+    position: relative;
+    width: 100%;
+    max-width: 730px;      /* matches Bootstrap col-sm-8 container width */
+    margin: 0 auto;        /* centers it */
+    min-height: 300px;
+    background-image: url('../images/delphi.png');
+    background-size: cover;
+    background-position: center;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+}
+
+.header-title {
+    color: white;
+    font-weight: bold;
+    text-align: center;
+    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
+    padding: 40px 20px;
+}
+
+.header-title h1,
+.header-title h4 {
+    text-align: center;
+}
+
+/* Tooltip styles */
+.tooltip-container {
+    position: absolute;
+    bottom: 8px;
+    right: 8px;
+}
+
+.tooltip-trigger {
+    width: 24px;
+    height: 24px;
+    border-radius: 50%;
+    border: 1.5px solid rgba(255, 255, 255, 0.7);
+    background: transparent;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    text-decoration: none;
+    color: rgba(255, 255, 255, 0.8);
+    font-size: 14px;
+    font-weight: bold;
+}
+
+.tooltip-box {
+    position: absolute;
+    bottom: 32px;
+    right: 0;
+    background: rgba(0, 0, 0, 0.85);
+    color: white;
+    padding: 10px 14px;
+    border-radius: 6px;
+    font-size: 13px;
+    width: 200px;
+    opacity: 0;
+    visibility: hidden;
+    transition: opacity 0.2s, visibility 0.2s;
+    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
+}
+
+/* Responsive adjustments */
+@media (max-width: 768px){
+    .header-banner {
+        min-height: 250px;
+        margin-left: 15px;
+        margin-right: 15px;
+    }
+}
\ No newline at end of file
diff --git a/stamina/index.html b/stamina/index.html
index 6c66aba..ca472a1 100644
--- a/stamina/index.html
+++ b/stamina/index.html
@@ -62,72 +62,24 @@
   <!-- ============================================================
        HEADER / HERO IMAGE
        ============================================================ -->
-  <section id="header" class="some-section">
-    <div class="container">
-      <div class="row">
-        <div class="col-sm-2"></div>
-          <div class="col-sm-8">
-            <div class="listing" style="clear:both;">
-                <div style="width: 100%; margin: 0 auto;">
-                    <div style="position: relative; display: inline-block; width: 100%;">
-
-                    <!-- Background Image -->
-                    <img src="images/delphi.png" alt="STAMINA header" style="width: 100%; display: block;" />
-
-                    <!-- Overlay Title -->
-                    <div style="position: absolute;
-                                top: 50%;
-                                left: 50%;
-                                transform: translate(-50%, -50%);
-                                color: white;
-                                font-size: 24px;
-                                font-weight: bold;
-                                text-align: center;
-                                text-shadow: 2px 2px 4px rgba(0,0,0,0.5);">
-                        <h1 style="text-align:center"><b>STAMINA</b> <br> Working Group</h1>
-                        <h4 style="text-align:center">
-                        <b>S</b>ocial <b>T</b>ech <b>A</b>nd <b>M</b>odell<b>I</b>ng <br> for k<b>N</b>owledge & <b>A</b>ction
-                        </h4>
-                    </div>
+  <div class="header-banner">
+    <!-- Overlay Title -->
+    <div class="header-title">
+      <h1><b>STAMINA</b> <br> Working Group</h1>
+      <h4>
+        <b>S</b>ocial <b>T</b>ech <b>A</b>nd <b>M</b>odell<b>I</b>ng <br> for k<b>N</b>owledge & <b>A</b>ction
+      </h4>
+    </div>
 
-                    <!-- Info Tooltip (bottom-right) -->
-                    <div class="tooltip-container" style="position: absolute; bottom: 8px; right: 8px;">
-                        <a href="https://vimeo.com/244171658?fl=pl&fe=cm#t=20m15s"
-                        style="width: 24px;
-                                height: 24px;
-                                border-radius: 50%;
-                                border: 1.5px solid rgba(255,255,255,0.7);
-                                background: transparent;
-                                display: flex;
-                                align-items: center;
-                                justify-content: center;
-                                text-decoration: none;
-                                color: rgba(255,255,255,0.8);
-                                font-size: 14px;
-                                font-weight: bold;">?</a>
-                        <div class="tooltip-box" style="position: absolute;
-                                                        bottom: 32px;
-                                                        right: 0;
-                                                        background: rgba(0,0,0,0.85);
-                                                        color: white;
-                                                        padding: 10px 14px;
-                                                        border-radius: 6px;
-                                                        font-size: 13px;
-                                                        width: 200px;
-                                                        opacity: 0;
-                                                        visibility: hidden;
-                                                        transition: opacity 0.2s, visibility 0.2s;
-                                                        box-shadow: 0 2px 8px rgba(0,0,0,0.3);">
-                        Learn about STAMINA in the About section below. Interested in the background image?
-                        It's from the short film <a href="https://vimeo.com/244171658?fl=pl&fe=cm#t=20m15s">Delphi</a>.
-                        </div>
-                    </div>
-                </div>
-            </div>
-          </div>
+    <!-- Info Tooltip (bottom-right) -->
+    <div class="tooltip-container">
+      <a href="https://vimeo.com/244171658?fl=pl&fe=cm#t=20m15s" class="tooltip-trigger">?</a>
+      <div class="tooltip-box">
+          Learn about STAMINA in the About section below. Interested in the background image?
+          It's from the short film <a href="https://vimeo.com/244171658?fl=pl&fe=cm#t=20m15s">Delphi</a>.
       </div>
     </div>
-  </section>
+  </div>
 
   <!-- ============================================================
        MEETING INFO (edit placeholders below)
@@ -141,10 +93,10 @@ <h5 style="text-align:center">Follow us on Twitter <a href="[TWITTER_LINK]">@sta
                 <h5 style="text-align:center">Follow us on Bluesky <a href="[BLUESKY_LINK]">@stamina_rg.bsky.social</a></h5>
                 <h5 style="text-align:center">Join our Slack: <a href="[SLACK_INVITE]">here</a></h5>
                 -->
-                <h5 style="text-align:center">Sign up to the mailing list to receive announcements about STAMINA activities: <a href="https://docs.google.com/forms/d/e/1FAIpQLSe2_x4mGANiUu0j6L9S5Wjk26Kk6q1vdQqsccaoM4Cfb-GMlg/viewform?usp=dialog"><img src="https://img.shields.io/badge/signup%20form-8A2BE2"></a></h5>
-                <h5 style="text-align:center">Suggest a speaker (yourself or others) to give a talk in our seminar series: <a href="https://docs.google.com/forms/d/e/1FAIpQLScNYXPRqVu7WRfRRcpOP2LwrdhRxumckq7uIuZ7J3HO7EdNKQ/viewform?usp=publish-editor"><img src="https://img.shields.io/badge/suggest%20form-8A2BE2"></a></h5>
+                <h5 style="text-align:center">Sign up to the mailing list to receive announcements about STAMINA activities: <a href="https://docs.google.com/forms/d/e/1FAIpQLSe2_x4mGANiUu0j6L9S5Wjk26Kk6q1vdQqsccaoM4Cfb-GMlg/viewform?usp=dialog" target="_blank" rel="noopener noreferrer"><img src="https://img.shields.io/badge/signup%20form-8A2BE2"></a></h5>
+                <h5 style="text-align:center">Suggest a speaker (yourself or others) to give a talk in our seminar series: <a href="https://docs.google.com/forms/d/e/1FAIpQLScNYXPRqVu7WRfRRcpOP2LwrdhRxumckq7uIuZ7J3HO7EdNKQ/viewform?usp=publish-editor" target="_blank" rel="noopener noreferrer"><img src="https://img.shields.io/badge/suggest%20form-8A2BE2"></a></h5>
                 <!-- <h5 style="text-align:center">Register the event in your <a href="[GOOGLE_CALENDAR]">Google Calendar</a>.</h5> -->
-                <h5 style="text-align:center"> Visit our Youtube Channel for past event recordings: <a href="https://www.youtube.com/@ComplexDataLab/"><img src="https://img.shields.io/badge/Youtube-Recording-orange"></a> </h5>
+                <h5 style="text-align:center"> Visit our Youtube Channel for past event recordings: <a href="https://www.youtube.com/@ComplexDataLab/" target="_blank" rel="noopener noreferrer"><img src="https://img.shields.io/badge/Youtube-Recording-orange"></a> </h5>
 
             </div>
           </div>
@@ -182,7 +134,7 @@ <h3 style="text-align:center">About STAMINA</h3>
             </p>
 
             <p style="text-align:justify; font-size:16px; line-height:1.6;">
-              This Working Group emerged from the <a href="https://sites.google.com/view/social-sims-with-llms">LLM-based Social Simulation Workshop</a> at <a href="https://colmweb.org/">COLM</a> in Montreal.
+              This Working Group emerged from the <a href="https://sites.google.com/view/social-sims-with-llms" target="_blank" rel="noopener noreferrer">LLM-based Social Simulation Workshop</a> at <a href="https://colmweb.org/">COLM</a> in Montreal.
             </p>
           </div>
         </div>
@@ -375,13 +327,13 @@ <h3 style="text-align:center">With Support From:</h3>
             <div class="container">
               <div class="row">
                 <div class="col-sm-3">
-                  <a href="https://mila.quebec/"><img src="images/milalogowebcoulrgb.png" width="85%" alt="Mila" class="img-rounded"/></a>
+                  <a href="https://mila.quebec/" target="_blank" rel="noopener noreferrer"><img src="images/milalogowebcoulrgb.png" width="85%" alt="Mila" class="img-rounded"/></a>
                 </div>
                 <div class="col-sm-3">
-                  <a href="https://ivado.ca/"><img src="images/ivado-rgb_logo-full-degrade.png" width="85%" alt="ivado" class="img-rounded"/></a>
+                  <a href="https://ivado.ca/" target="_blank" rel="noopener noreferrer"><img src="images/ivado-rgb_logo-full-degrade.png" width="85%" alt="ivado" class="img-rounded"/></a>
                 </div>
                 <div class="col-sm-3">
-                  <a href="https://futureoflife.org/"><img src="images/fli_logo_white-300x204.png" width="55%" alt="fli" class="img-rounded"/></a>
+                  <a href="https://futureoflife.org/" target="_blank" rel="noopener noreferrer"><img src="images/fli_logo_white-300x204.png" width="55%" alt="fli" class="img-rounded"/></a>
                 </div>
               </div>
             </div>