diff --git a/presentation/deck/deck.css b/presentation/deck/deck.css
index bcd48722..cde94720 100644
--- a/presentation/deck/deck.css
+++ b/presentation/deck/deck.css
@@ -48,6 +48,7 @@
 .arit .foot span:first-child { overflow: hidden; text-overflow: ellipsis; flex-shrink: 1; }
 .arit .sbody { flex: 1; min-height: 0; display: flex; flex-direction: column; padding: 30px 48px 22px; text-align: left; }
 .arit.title-slide .sbody { justify-content: center; }
+.arit.center-v .sbody { justify-content: center; }
 
 /* ---------- typography ---------- */
 .arit .kicker { font: 700 12px/1 var(--sans); letter-spacing: .16em; text-transform: uppercase; color: var(--bordeaux); margin-bottom: 14px; }
@@ -72,27 +73,29 @@
 
 /* quote */
 .arit .quote {
-  margin: 14px 0 20px; padding: 16px 22px; border-left: 3px solid var(--bordeaux);
-  background: var(--surface-alt); border-radius: 0 8px 8px 0;
-  font: italic 400 16px/1.5 var(--display); color: var(--ink);
+  position: relative; margin: 14px 0 20px; padding: 20px 26px 18px 68px; border: 1px solid var(--line);
+  background: var(--surface-alt); border-radius: 8px;
+  font: italic 400 19px/1.55 var(--display); color: var(--ink);
 }
+.arit .quote::before { content: '\201C'; position: absolute; left: 22px; top: 10px;
+  font: 700 52px/1 var(--display); color: var(--bordeaux); }
 .arit .quote small { display: block; margin-top: 6px; font: 600 11px/1.4 var(--sans); font-style: normal;
   letter-spacing: .06em; text-transform: uppercase; color: var(--ink-muted); }
 
 /* mini pipeline (problem / thoth slides) */
-.arit .pipeline { display: flex; align-items: stretch; gap: 10px; }
-.arit .stage { flex: 1; padding: 12px 10px; text-align: center; border: 1px solid var(--line); border-radius: 8px; background: var(--surface-alt); }
-.arit .stage b { display: block; font: 700 13.5px/1.2 var(--sans); margin-bottom: 4px; }
-.arit .stage span { display: block; font: 400 11px/1.35 var(--sans); color: var(--ink-muted); }
+.arit .pipeline { display: flex; align-items: stretch; gap: 12px; }
+.arit .stage { flex: 1; padding: 15px 12px; text-align: center; border: 1px solid var(--line); border-radius: 8px; background: var(--surface-alt); }
+.arit .stage b { display: block; font: 700 14px/1.2 var(--sans); margin-bottom: 4px; }
+.arit .stage span { display: block; font: 400 11.5px/1.35 var(--sans); color: var(--ink-muted); }
 .arit .stage .tag { display: inline-block; margin-top: 6px; padding: 3px 10px; border-radius: 9999px;
   background: var(--bordeaux); color: #fdfcfc; font: 700 9.5px/1 var(--sans); letter-spacing: .1em; text-transform: uppercase; }
 .arit .stage.ai { background: var(--bordeaux-tint); border-color: var(--bordeaux); }
-.arit .arrow { align-self: center; color: var(--line-strong); font: 700 18px/1 var(--sans); }
-.arit .thoth-wrap { display: flex; justify-content: flex-end; margin-top: 14px; }
-.arit .thoth-col { width: 470px; text-align: center; }
-.arit .thoth-arrow { color: var(--line-strong); font: 700 16px/1 var(--sans); margin: 2px 0; }
-.arit .thoth-box { border: 1px solid var(--bordeaux); border-radius: 8px; padding: 10px 14px;
-  background: var(--surface-alt); font: 600 12.5px/1.4 var(--sans); }
+.arit .arrow { align-self: center; color: var(--line-strong); font: 700 20px/1 var(--sans); }
+.arit .thoth-wrap { display: flex; justify-content: flex-end; margin-top: 18px; }
+.arit .thoth-col { width: 540px; text-align: center; }
+.arit .thoth-arrow { color: var(--line-strong); font: 700 18px/1 var(--sans); margin: 2px 0; }
+.arit .thoth-box { border: 1px solid var(--bordeaux); border-radius: 8px; padding: 12px 16px;
+  background: var(--surface-alt); font: 600 13px/1.4 var(--sans); }
 .arit .thoth-box .tag { margin-right: 8px; }
 
 /* points */
@@ -109,6 +112,8 @@
 .arit .split { display: flex; gap: 40px; flex: 1; min-height: 0; }
 .arit .split .left { flex: 0 0 430px; display: flex; flex-direction: column; }
 .arit .split .right { flex: 1; min-width: 0; display: flex; }
+.arit.nlp .split .right { align-items: center; }
+.arit.nlp .code { flex: 0 0 auto; }
 .arit .code { width: 100%; display: flex; flex-direction: column; overflow: hidden;
   border: 1px solid var(--line-strong); border-radius: 8px; background: var(--surface-sunken); }
 .arit .code-head { flex: 0 0 38px; display: flex; align-items: center; justify-content: space-between;
@@ -118,14 +123,15 @@
 .arit .code b { font-weight: 700; color: var(--bordeaux-deep); }
 .arit .code i { font-style: normal; color: #2f6f4f; }
 
-/* stats */
-.arit .stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; flex: 1; align-content: center; }
-.arit .stat { border: 1px solid var(--line); border-radius: 8px; background: var(--surface-alt);
-  padding: 26px 22px; display: flex; flex-direction: column; gap: 10px; }
-.arit .stat .num { font: 700 46px/1 var(--sans); color: var(--bordeaux); letter-spacing: -.02em; }
-.arit .stat .lbl { font: 600 13.5px/1.35 var(--sans); color: var(--ink); }
-.arit .stat .sub { font: 400 11.5px/1.4 var(--sans); color: var(--ink-muted); }
-.arit .stat-note { margin-top: 20px; font: 400 12.5px/1.5 var(--sans); color: var(--ink-muted); }
+/* stats — editorial numeral band */
+.arit .stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
+.arit .stat { padding: 8px 24px; display: flex; flex-direction: column; gap: 10px; }
+.arit .stat:first-child { padding-left: 0; }
+.arit .stat + .stat { border-left: 1px solid var(--line); }
+.arit .stat .num { font: 700 62px/1 var(--sans); color: var(--bordeaux); letter-spacing: -.02em; }
+.arit .stat .lbl { font: 600 14.5px/1.35 var(--sans); color: var(--ink); }
+.arit .stat .sub { font: 400 12px/1.45 var(--sans); color: var(--ink-muted); }
+.arit .stat-note { margin-top: 26px; font: 400 13px/1.5 var(--sans); color: var(--ink-muted); }
 
 /* divider */
 .arit.divider .sbody { justify-content: center; }
diff --git a/presentation/deck/index.html b/presentation/deck/index.html
index 42897dd7..ed97de64 100644
--- a/presentation/deck/index.html
+++ b/presentation/deck/index.html
@@ -5,7 +5,7 @@
 <title>AritmoLab — Role of AI in the Analysis of Unstructured Clinical Databases</title>
 <link rel="stylesheet" href="vendor/reveal/dist/reveal.css">
 <link rel="stylesheet" href="fonts.css?v=8">
-<link rel="stylesheet" href="deck.css?v=24">
+<link rel="stylesheet" href="deck.css?v=26">
 </head>
 <body>
 <div class="reveal"><div class="slides">
@@ -199,7 +199,7 @@
 </section>
 
 
-<section class="arit">
+<section class="arit center-v">
   <header class="head">
     <img src="logo.png" alt="">
     <span class="head-org">AritmoLab · Policlinico San Donato</span>
@@ -241,7 +241,7 @@
 </section>
 
 
-<section class="arit">
+<section class="arit center-v">
   <header class="head">
     <img src="logo.png" alt="">
     <span class="head-org">AritmoLab · Policlinico San Donato</span>
@@ -268,7 +268,7 @@
 </section>
 
 
-<section class="arit">
+<section class="arit nlp">
   <header class="head">
     <img src="logo.png" alt="">
     <span class="head-org">AritmoLab · Policlinico San Donato</span>
@@ -314,7 +314,7 @@
 </section>
 
 
-<section class="arit">
+<section class="arit center-v">
   <header class="head">
     <img src="logo.png" alt="">
     <span class="head-org">AritmoLab · Policlinico San Donato</span>
@@ -326,13 +326,13 @@
     <div class="kicker">The clinical ontology</div>
     <h2>Two tiers, one clinical order</h2>
     <div class="tier">
-      <span class="tier-label">TIER 1 · arrhythmic</span>
+      <span class="tier-label">TIER 1 · arrhythmic — 11 categories</span>
       <div class="chips">
         <span class="chipc">FA</span><span class="chipc">Brugada</span><span class="chipc">Flutter</span><span class="chipc">TA</span><span class="chipc">TRN</span><span class="chipc">WPW / TPSV</span><span class="chipc">TV</span><span class="chipc">FV</span><span class="chipc">Extrasistolia V.</span><span class="chipc">Sincope</span><span class="chipc">QT lungo</span>
       </div>
     </div>
     <div class="tier">
-      <span class="tier-label">TIER 2 · structural</span>
+      <span class="tier-label">TIER 2 · structural — 5 categories</span>
       <div class="chips">
         <span class="chipc t2">Blocco AV</span><span class="chipc t2">Blocco di branca</span><span class="chipc t2">Cardiomiopatia</span><span class="chipc t2">Scompenso</span><span class="chipc t2">Valvulopatia</span>
       </div>
@@ -352,7 +352,7 @@
 </section>
 
 
-<section class="arit">
+<section class="arit center-v">
   <header class="head">
     <img src="logo.png" alt="">
     <span class="head-org">AritmoLab · Policlinico San Donato</span>