diff --git a/presentation/deck/index.html b/presentation/deck/index.html
index 202688cb..bb141787 100644
--- a/presentation/deck/index.html
+++ b/presentation/deck/index.html
@@ -60,16 +60,16 @@
         <div class="todo" data-missing="ml" style="margin-left:4%"><span class="q">?</span><span class="tx"><b>ML-ready data</b><span>cohort tables, ready for model training</span></span></div>
         <div class="todo" data-missing="portal" style="margin-left:12%"><span class="q">?</span><span class="tx"><b>Professional Portal</b><span>AritmoLab — the grown-up Omics Portal</span></span></div>
       </div>
-      <button class="isle" data-start="cardioref" style="--rot:-3deg; --size:114px; left:1%; top:4%; width:230px">
+      <button class="isle" data-start="cardioref" style="--rot:-3deg; --size:114px; left:calc(1% + 39px); top:4%; width:230px">
         <svg class="ico" viewBox="0 0 48 48" fill="none" stroke="currentColor" stroke-width="2.6" stroke-linecap="round" stroke-linejoin="round"><path d="M24 33 c-6-3.5-9-7-9-10.5 0-3 4-5.5 7-3 1 .8 1.6 1.8 2 3 .4-1.2 1-2.2 2-3 3-2.5 7 0 7 3 0 3.5-3 7-9 10.5z" fill="currentColor" stroke="none"/><path d="M22.5 21 h3 v3 h3 v3 h-3 v3 h-3 v-3 h-3 v-3 h3 z" fill="#fff" stroke="none"/></svg>
         <span class="nm">Cardioref</span><span class="sc" style="width:300px">visits · operations · reports — twenty years of management on structured forms</span></button>
-      <button class="isle" data-start="genetic" style="--rot:3deg; --size:114px; left:73%; top:4%; width:230px">
+      <button class="isle" data-start="genetic" style="--rot:3deg; --size:114px; left:calc(73% + 39px); top:4%; width:230px">
         <svg class="ico" viewBox="0 0 48 48" fill="none" stroke="currentColor" stroke-width="2.6" stroke-linecap="round" stroke-linejoin="round"><path d="M18 8 C28 14 28 20 18 26 C12 30 12 35 18 40"/><path d="M30 8 C20 14 20 20 30 26 C36 30 36 35 30 40"/><path d="M17 12 H31"/><path d="M15.5 18 H32.5"/><path d="M17 24 H31"/><path d="M14.5 31 H22"/><rect x="25" y="29" width="12" height="12" rx="1.5" stroke-width="2"/><path d="M25 34 H37"/><path d="M30.5 29 V41"/></svg>
         <span class="nm">Genetic data</span><span class="sc">DNA instruments — results typed into Excel by hand</span></button>
-      <button class="isle" data-start="omics" style="--rot:-2deg; --size:114px; left:1%; top:55%; width:230px">
+      <button class="isle" data-start="omics" style="--rot:-2deg; --size:114px; left:calc(1% + 39px); top:55%; width:230px">
         <svg class="ico" viewBox="0 0 48 48" fill="none" stroke="currentColor" stroke-width="2.6" stroke-linecap="round" stroke-linejoin="round"><circle cx="24" cy="24" r="20" stroke-width="2.6"/><circle cx="24" cy="24" r="4" fill="currentColor" stroke="none"/><circle cx="24" cy="10" r="3.4"/><circle cx="11.5" cy="31" r="3.4"/><circle cx="36.5" cy="31" r="3.4"/><path d="M24 20.5 V13.5"/><path d="M21 26.5 L14 29.5"/><path d="M27 26.5 L34 29.5"/></svg>
         <span class="nm">Omics Portal</span><span class="sc">meant to host Cardioref + genetics — still immature</span></button>
-      <button class="isle" data-start="ecg" style="--rot:2deg; --size:114px; left:73%; top:55%; width:230px">
+      <button class="isle" data-start="ecg" style="--rot:2deg; --size:114px; left:calc(73% + 39px); top:55%; width:230px">
         <svg class="ico" viewBox="0 0 48 48" fill="none" stroke="currentColor" stroke-width="2.6" stroke-linecap="round" stroke-linejoin="round"><circle cx="24" cy="24" r="20" stroke-width="2.6"/><path d="M9 24 h6 l3-9 5 16 3-7 h14" stroke-width="2.4"/><circle cx="24" cy="24" r="1.8" fill="currentColor" stroke="none"/></svg>
         <span class="nm">ECG</span><span class="sc">paper strip + a CSV on request</span></button>
       <div class="missing-title" style="left:calc(30% + 14px); top:calc(22% - 46px); width:40%">Missing Pieces</div>