diff --git a/.DS_Store b/.DS_Store
deleted file mode 100644
index 824b8f2..0000000
Binary files a/.DS_Store and /dev/null differ
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..648a11e
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,6 @@
+.DS_Store
+# OpenSCAD Render-/Export-Artefakte (Vorschau + STL)
+_*.png
+*.stl
+*.bak
+*.tmp
diff --git a/01_3D-Druck/gate-tile.svg b/01_3D-Druck/gate-tile.svg
deleted file mode 100644
index 80b182c..0000000
--- a/01_3D-Druck/gate-tile.svg
+++ /dev/null
@@ -1,80 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" width="640" height="500" viewBox="0 0 640 500" font-family="system-ui, Arial, sans-serif">
-  <style>
-    .tile  { fill:#f3e3e3; stroke:#1d2430; stroke-width:1.5; }   /* eigene Gate-Farbe (Beispiel rötlich) */
-    .spot  { fill:#ffffff; stroke:#c0392b; stroke-width:1.2; stroke-dasharray:3 2; }
-    .hole  { fill:#8a94a3; stroke:#1d2430; stroke-width:1; }
-    .icon  { fill:none; stroke:#1d2430; stroke-width:2.4; stroke-linecap:round; stroke-linejoin:round; }
-    .h1    { fill:#1d2430; font-size:18px; font-weight:700; }
-    .sub   { fill:#444; font-size:12px; }
-    .lbl   { fill:#444; font-size:11px; text-anchor:middle; }
-    .cap   { fill:#1d2430; font-size:13px; font-weight:700; }
-  </style>
-  <rect x="0" y="0" width="640" height="500" fill="#ffffff"/>
-  <defs>
-    <marker id="ah" markerWidth="7" markerHeight="7" refX="3" refY="6" orient="auto">
-      <path d="M0,6 L3,0 L6,6" fill="none" stroke="#1d2430" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
-    </marker>
-  </defs>
-
-  <text x="24" y="30" class="h1">Gate-Tile</text>
-  <text x="24" y="50" class="sub">100 × 100 × 6 mm wie Aktivitäts-Tile, eigene Farbe · 8 generische Standfelder · Gate steckt ein · Entscheidungs-Icon (Gravur) · keine Beschriftung</text>
-
-  <!-- ===== Draufsicht (2 px = 1 mm) ===== -->
-  <g transform="translate(70,80)">
-    <!-- Puzzle-Tabs N + O -->
-    <rect x="88" y="-12" width="24" height="12" class="tile"/>
-    <rect x="200" y="88" width="12" height="24" class="tile"/>
-    <!-- Tile -->
-    <rect x="0" y="0" width="200" height="200" rx="6" class="tile"/>
-    <!-- Slots S + W -->
-    <rect x="88" y="188" width="24" height="12" fill="#fff" stroke="#1d2430" stroke-width="1" stroke-dasharray="4 3"/>
-    <rect x="0" y="88" width="12" height="24" fill="#fff" stroke="#1d2430" stroke-width="1" stroke-dasharray="4 3"/>
-
-    <!-- 8 Standfelder im Ring (r62 px) -->
-    <circle cx="162" cy="100" r="18" class="spot"/>
-    <circle cx="144" cy="144" r="18" class="spot"/>
-    <circle cx="100" cy="162" r="18" class="spot"/>
-    <circle cx="56"  cy="144" r="18" class="spot"/>
-    <circle cx="38"  cy="100" r="18" class="spot"/>
-    <circle cx="56"  cy="56"  r="18" class="spot"/>
-    <circle cx="100" cy="38"  r="18" class="spot"/>
-    <circle cx="144" cy="56"  r="18" class="spot"/>
-
-    <!-- Gate-Stecksockel (2 Löcher), nahe Eingangskante (unten) -->
-    <circle cx="60"  cy="176" r="10" class="hole"/>
-    <circle cx="140" cy="176" r="10" class="hole"/>
-
-    <!-- Entscheidungs-Icon (Gravur) in der Mitte -->
-    <g transform="translate(100,100)">
-      <!-- offener Ring + Fragezeichen -->
-      <path class="icon" d="M -14 -2 A 14 14 0 1 0 14 -2"/>
-      <text x="0" y="9" text-anchor="middle" font-size="22" font-weight="700" fill="#1d2430">?</text>
-      <!-- drei Pfeile nach oben -->
-      <path class="icon" d="M 0 -8 L 0 -26" marker-end="url(#ah)"/>
-      <path class="icon" d="M -8 -6 L -22 -20" marker-end="url(#ah)"/>
-      <path class="icon" d="M 8 -6 L 22 -20" marker-end="url(#ah)"/>
-    </g>
-
-    <text x="100" y="224" class="lbl">unten: Eingangskante — Gate-Tor steckt in die 2 Löcher</text>
-  </g>
-
-  <!-- ===== Legende ===== -->
-  <g transform="translate(330,90)">
-    <text x="0" y="0" class="cap">Eckdaten</text>
-    <text x="0" y="24" class="sub">• 8 Standfelder Ø18 im Ring (Ø62), Sockel Ø20</text>
-    <text x="0" y="44" class="sub">• 2 Gate-Stecksockel Ø10,4 · Abstand 80 mm</text>
-    <text x="0" y="64" class="sub">• Mitte: Entscheidungs-Icon (3 Pfeile + ?), Gravur ~0,6</text>
-    <text x="0" y="84" class="sub">• sonst KEINE Beschriftung; eigene Gate-Farbe</text>
-    <text x="0" y="104" class="sub">• Puzzle-Tabs wie Aktivitäts-Tile (in der Bahn)</text>
-
-    <text x="0" y="140" class="cap">Besetzung (über App/Gate-Karte)</text>
-    <text x="0" y="164" class="sub">• Gate 1 &amp; 3 = SOR-Gremium:</text>
-    <text x="0" y="182" class="sub">  SPM + OP + SSM + SHM + SO ≈ 5 Figuren</text>
-    <text x="0" y="200" class="sub">• Gate 2 = SO allein (1 Figur)</text>
-    <text x="0" y="218" class="sub">→ 8 Standfelder decken das mit Puffer ab.</text>
-
-    <text x="0" y="254" class="cap">Hinweis</text>
-    <text x="0" y="278" class="sub">Hoher Bogen auf 2 Zapfen im 6-mm-Tile:</text>
-    <text x="0" y="296" class="sub">Standfestigkeit am Funktionsmuster prüfen.</text>
-  </g>
-</svg>