diff --git a/slides/223015b/assets/demos/pivot-signal-zu-byte.html b/slides/223015b/assets/demos/pivot-signal-zu-byte.html
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@@ -0,0 +1,173 @@
+<!DOCTYPE html>
+<html lang="de">
+<head>
+<meta charset="UTF-8">
+<title>Wir haben gelernt zu lesen — jetzt: wie kommt es rein?</title>
+<style>
+  :root {
+    --dark: #1a1a2e;
+    --muted: #6b7280;
+    --soft: #f8fafc;
+    --border: #cbd5e1;
+    --hl: #d63384;
+    --done: #94a3b8;
+    --next: #d63384;
+    --bytes: #0891b2;
+  }
+  html, body { margin: 0; padding: 0; background: #fff; font-family: system-ui, -apple-system, sans-serif; color: var(--dark); }
+  body { padding: 32px 40px; }
+  h1 { text-align: center; margin: 0 0 6px; font-size: 1.7rem; }
+  .sub { text-align: center; color: var(--muted); margin-bottom: 36px; font-size: 1.05rem; }
+  .sub strong { color: var(--dark); }
+
+  .pivot {
+    display: grid;
+    grid-template-columns: 200px 1fr 240px 1fr 200px;
+    gap: 8px;
+    max-width: 1200px;
+    margin: 0 auto;
+    align-items: center;
+  }
+
+  .station {
+    border: 2px solid var(--border);
+    border-radius: 12px;
+    padding: 18px 14px;
+    background: #fff;
+    text-align: center;
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    gap: 10px;
+  }
+  .station.bytes { border-color: var(--bytes); background: #0f0f23; color: #fff; }
+  .station-tag {
+    font-size: 0.7rem;
+    font-weight: 700;
+    text-transform: uppercase;
+    letter-spacing: 0.12em;
+    color: var(--muted);
+  }
+  .station.bytes .station-tag { color: #94a3b8; }
+  .station-name { font-size: 1.3rem; font-weight: 700; }
+  .station.bytes .station-name { color: #67e8f9; }
+  .station-detail { font-size: 0.85rem; color: var(--muted); }
+  .station.bytes .station-detail { color: #94a3b8; font-family: ui-monospace, monospace; font-size: 0.78rem; line-height: 1.4; }
+
+  .station-art { display: flex; align-items: center; justify-content: center; height: 70px; }
+  .station-art svg { width: 80%; height: 100%; }
+
+  .strang {
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    gap: 6px;
+    padding: 0 6px;
+  }
+  .strang-arrow svg { display: block; width: 100%; height: 28px; }
+  .strang-label {
+    font-size: 0.95rem;
+    font-weight: 700;
+    text-align: center;
+    line-height: 1.3;
+  }
+  .strang.next .strang-label  { color: var(--next); }
+  .strang.done .strang-label  { color: var(--done); text-decoration: line-through; text-decoration-color: var(--done); text-decoration-thickness: 1.5px; }
+  .strang-tag {
+    font-size: 0.72rem;
+    font-weight: 700;
+    text-transform: uppercase;
+    letter-spacing: 0.12em;
+    text-align: center;
+  }
+  .strang.next .strang-tag { color: var(--next); }
+  .strang.done .strang-tag { color: var(--done); }
+
+  .verdict {
+    margin-top: 28px;
+    max-width: 1100px;
+    margin-left: auto;
+    margin-right: auto;
+    text-align: center;
+    border: 2px solid var(--hl);
+    border-radius: 12px;
+    padding: 14px 22px;
+  }
+  .verdict-q { font-size: 1.1rem; font-weight: 700; color: var(--hl); }
+  .verdict-a { font-size: 0.95rem; color: var(--dark); margin-top: 4px; }
+  .verdict-a strong { color: var(--hl); }
+</style>
+</head>
+<body>
+  <h1>Wir haben gelernt zu <strong>lesen</strong>. Jetzt: wie kommt es <strong>rein</strong>?</h1>
+  <div class="sub">Die rechte Seite haben wir abgearbeitet. Die linke ist die nächste Stunde.</div>
+
+  <div class="pivot">
+
+    <div class="station">
+      <div class="station-tag">Quelle</div>
+      <div class="station-name">Welt</div>
+      <div class="station-art">
+        <svg viewBox="0 0 120 70" preserveAspectRatio="xMidYMid meet">
+          <path d="M5,35 Q15,10 25,35 T45,35 T65,35 T85,35 T105,35 T115,35"
+                stroke="#d63384" stroke-width="2.5" fill="none"/>
+          <circle cx="115" cy="35" r="3" fill="#d63384"/>
+        </svg>
+      </div>
+      <div class="station-detail">Schallwelle · Lichtwelle<br>kontinuierlich · analog</div>
+    </div>
+
+    <div class="strang next">
+      <div class="strang-tag">jetzt dran</div>
+      <div class="strang-arrow">
+        <svg viewBox="0 0 220 28" preserveAspectRatio="none">
+          <line x1="6" y1="14" x2="200" y2="14" stroke="#d63384" stroke-width="2.5"/>
+          <path d="M195,7 L208,14 L195,21" stroke="#d63384" stroke-width="2.5" fill="none"/>
+        </svg>
+      </div>
+      <div class="strang-label">Sampling + Quantisierung</div>
+    </div>
+
+    <div class="station bytes">
+      <div class="station-tag">Mitte</div>
+      <div class="station-name">Datei</div>
+      <div class="station-detail">
+        89 50 4E 47<br>
+        0D 0A 1A 0A<br>
+        00 00 00 0D
+      </div>
+    </div>
+
+    <div class="strang done">
+      <div class="strang-tag">schon durch</div>
+      <div class="strang-arrow">
+        <svg viewBox="0 0 220 28" preserveAspectRatio="none">
+          <line x1="6" y1="14" x2="200" y2="14" stroke="#94a3b8" stroke-width="2"/>
+          <path d="M195,7 L208,14 L195,21" stroke="#94a3b8" stroke-width="2" fill="none"/>
+        </svg>
+      </div>
+      <div class="strang-label">Notation · Encoding · Format</div>
+    </div>
+
+    <div class="station">
+      <div class="station-tag">Ziel</div>
+      <div class="station-name">Mensch</div>
+      <div class="station-art">
+        <svg viewBox="0 0 120 70" preserveAspectRatio="xMidYMid meet">
+          <rect x="14" y="14" width="92" height="14" rx="2" fill="#1a1a2e"/>
+          <rect x="14" y="34" width="68" height="6" rx="1" fill="#cbd5e1"/>
+          <rect x="14" y="44" width="78" height="6" rx="1" fill="#cbd5e1"/>
+          <rect x="14" y="54" width="56" height="6" rx="1" fill="#cbd5e1"/>
+        </svg>
+      </div>
+      <div class="station-detail">Text · Bild · Klang<br>Bedeutung</div>
+    </div>
+
+  </div>
+
+  <div class="verdict">
+    <div class="verdict-q">Die Datei ist die Mitte. Beide Wege führen durch sie hindurch.</div>
+    <div class="verdict-a"><strong>Rechts:</strong> aus Byte wird Bedeutung — gerade gelernt. &nbsp;&nbsp; <strong>Links:</strong> aus Welt wird Byte — jetzt.</div>
+  </div>
+</body>
+</html>
diff --git a/slides/223015b/assets/demos/pivot-signal-zu-byte.png b/slides/223015b/assets/demos/pivot-signal-zu-byte.png
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index 0000000..55e432a
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