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index ad73f77ef0..6fa6b16010 100644
--- a/book/src/.gitbook/assets/data-plane-fanout.svg
+++ b/book/src/.gitbook/assets/data-plane-fanout.svg
@@ -1,62 +1,80 @@
 <svg class="bob" font-family="arial" font-size="14" height="304" width="544" xmlns="http://www.w3.org/2000/svg">
 <defs>
 <marker id="triangle" markerHeight="8" markerWidth="8" orient="auto" refX="4" refY="2" viewBox="0 0 8 4">
-<polygon fill="black" points="0,0 0,4 8,2 0,0"/>
+<polygon class="fg_fill" points="0,0 0,4 8,2 0,0"/>
 </marker>
 <marker id="clear_triangle" markerHeight="10" markerWidth="10" orient="auto" refX="1" refY="7" viewBox="0 0 20 14">
-<polygon fill="none" points="2,2 2,12 18,7 2,2" stroke="black" stroke-width="2"/>
+<polygon class="bg_fill" points="2,2 2,12 18,7 2,2"/>
 </marker>
 <marker id="circle" markerHeight="5" markerWidth="5" orient="auto" refX="10" refY="10" viewBox="0 0 20 20">
-<circle cx="10" cy="10" fill="black" r="8"/>
+<circle class="fg_fill" cx="10" cy="10" r="8"/>
 </marker>
 <marker id="square" markerHeight="5" markerWidth="5" orient="auto" refX="10" refY="10" viewBox="0 0 20 20">
-<rect fill="black" height="20" width="20" x="0" y="0"/>
+<rect class="fg_fill" height="20" width="20" x="0" y="0"/>
 </marker>
 <marker id="open_circle" markerHeight="10" markerWidth="10" orient="auto" refX="10" refY="10" viewBox="0 0 20 20">
-<circle cx="10" cy="10" fill="white" r="4" stroke="black" stroke-width="2"/>
+<circle class="bg_fill" cx="10" cy="10" r="4"/>
 </marker>
 <marker id="big_open_circle" markerHeight="20" markerWidth="20" orient="auto" refX="20" refY="20" viewBox="0 0 40 40">
-<circle cx="20" cy="20" fill="white" r="6" stroke="black" stroke-width="2"/>
+<circle class="bg_fill" cx="20" cy="20" r="6"/>
 </marker>
 </defs>
 <style type="text/css">
 
-    line,path {
-      stroke: black;
-      stroke-width: 2;
-      stroke-opacity: 1;
-      fill-opacity: 1;
-      stroke-linecap: round;
-      stroke-linejoin: miter;
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-    circle.solid {
-      fill:black;
-      stroke: black;
-      stroke-width: 2;
-      stroke-opacity: 1;
-      fill-opacity: 1;
-      stroke-linecap: round;
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-      stroke: black;
-      stroke-width: 2;
-      stroke-opacity: 1;
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-      stroke-linecap: round;
-      stroke-linejoin: miter;
-    }
-    tspan.head{
-        fill: none;
-        stroke: none;
-    }
+rect.backdrop {
+    fill: white;
+}
+text{
+    fill: black;
+}
+
+circle {
+    fill: none;
+    stroke: black;
+    stroke-width: 2;
+}
+
+line {
+    stroke: black;
+    stroke-width: 2;
+    stroke-opacity: 1;
+    fill-opacity: 1;
+    stroke-linecap: round;
+    stroke-linejoin: miter;
+}
+
+path {
+    fill: none;
+    stroke: black;
+    stroke-width: 2;
+    stroke-opacity: 1;
+    fill-opacity: 1;
+    stroke-linecap: round;
+    stroke-linejoin: miter;
+}
+
+line.dashed {
+    stroke-dasharray: 5;
+}
+
+.fg_fill {
+    fill: black;
+}
+
+
+.bg_fill {
+    fill: white;
+    stroke: black;
+    stroke-width: 2;
+}
+
+tspan.head{
+    fill: none;
+    stroke: none;
+}
     
 </style>
-<rect fill="white" height="304" width="544" x="0" y="0"/>
+<rect class="backdrop" height="304" width="544" x="0" y="0"/>
 <g>
 <line x1="4" x2="4" y1="8" y2="184"/>
 <line x1="4" x2="540" y1="8" y2="8"/>
diff --git a/book/src/.gitbook/assets/data-plane-neighborhood.svg b/book/src/.gitbook/assets/data-plane-neighborhood.svg
index 1a7f080a31..f7a8b8182d 100644
--- a/book/src/.gitbook/assets/data-plane-neighborhood.svg
+++ b/book/src/.gitbook/assets/data-plane-neighborhood.svg
@@ -1,62 +1,80 @@
 <svg class="bob" font-family="arial" font-size="14" height="400" width="856" xmlns="http://www.w3.org/2000/svg">
 <defs>
 <marker id="triangle" markerHeight="8" markerWidth="8" orient="auto" refX="4" refY="2" viewBox="0 0 8 4">
-<polygon fill="black" points="0,0 0,4 8,2 0,0"/>
+<polygon class="fg_fill" points="0,0 0,4 8,2 0,0"/>
 </marker>
 <marker id="clear_triangle" markerHeight="10" markerWidth="10" orient="auto" refX="1" refY="7" viewBox="0 0 20 14">
-<polygon fill="none" points="2,2 2,12 18,7 2,2" stroke="black" stroke-width="2"/>
+<polygon class="bg_fill" points="2,2 2,12 18,7 2,2"/>
 </marker>
 <marker id="circle" markerHeight="5" markerWidth="5" orient="auto" refX="10" refY="10" viewBox="0 0 20 20">
-<circle cx="10" cy="10" fill="black" r="8"/>
+<circle class="fg_fill" cx="10" cy="10" r="8"/>
 </marker>
 <marker id="square" markerHeight="5" markerWidth="5" orient="auto" refX="10" refY="10" viewBox="0 0 20 20">
-<rect fill="black" height="20" width="20" x="0" y="0"/>
+<rect class="fg_fill" height="20" width="20" x="0" y="0"/>
 </marker>
 <marker id="open_circle" markerHeight="10" markerWidth="10" orient="auto" refX="10" refY="10" viewBox="0 0 20 20">
-<circle cx="10" cy="10" fill="white" r="4" stroke="black" stroke-width="2"/>
+<circle class="bg_fill" cx="10" cy="10" r="4"/>
 </marker>
 <marker id="big_open_circle" markerHeight="20" markerWidth="20" orient="auto" refX="20" refY="20" viewBox="0 0 40 40">
-<circle cx="20" cy="20" fill="white" r="6" stroke="black" stroke-width="2"/>
+<circle class="bg_fill" cx="20" cy="20" r="6"/>
 </marker>
 </defs>
 <style type="text/css">
 
-    line,path {
-      stroke: black;
-      stroke-width: 2;
-      stroke-opacity: 1;
-      fill-opacity: 1;
-      stroke-linecap: round;
-      stroke-linejoin: miter;
-    }
-    line.dashed {
-        stroke-dasharray: 5;
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-    circle.solid {
-      fill:black;
-      stroke: black;
-      stroke-width: 2;
-      stroke-opacity: 1;
-      fill-opacity: 1;
-      stroke-linecap: round;
-      stroke-linejoin: miter;
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-    circle.open {
-      fill:none;
-      stroke: black;
-      stroke-width: 2;
-      stroke-opacity: 1;
-      fill-opacity: 1;
-      stroke-linecap: round;
-      stroke-linejoin: miter;
-    }
-    tspan.head{
-        fill: none;
-        stroke: none;
-    }
+rect.backdrop {
+    fill: white;
+}
+text{
+    fill: black;
+}
+
+circle {
+    fill: none;
+    stroke: black;
+    stroke-width: 2;
+}
+
+line {
+    stroke: black;
+    stroke-width: 2;
+    stroke-opacity: 1;
+    fill-opacity: 1;
+    stroke-linecap: round;
+    stroke-linejoin: miter;
+}
+
+path {
+    fill: none;
+    stroke: black;
+    stroke-width: 2;
+    stroke-opacity: 1;
+    fill-opacity: 1;
+    stroke-linecap: round;
+    stroke-linejoin: miter;
+}
+
+line.dashed {
+    stroke-dasharray: 5;
+}
+
+.fg_fill {
+    fill: black;
+}
+
+
+.bg_fill {
+    fill: white;
+    stroke: black;
+    stroke-width: 2;
+}
+
+tspan.head{
+    fill: none;
+    stroke: none;
+}
     
 </style>
-<rect fill="white" height="400" width="856" x="0" y="0"/>
+<rect class="backdrop" height="400" width="856" x="0" y="0"/>
 <g>
 <line x1="4" x2="4" y1="8" y2="152"/>
 <line x1="4" x2="852" y1="8" y2="8"/>
diff --git a/book/src/.gitbook/assets/data-plane-seeding.svg b/book/src/.gitbook/assets/data-plane-seeding.svg
index 765b53c93f..7286bd291a 100644
--- a/book/src/.gitbook/assets/data-plane-seeding.svg
+++ b/book/src/.gitbook/assets/data-plane-seeding.svg
@@ -1,62 +1,80 @@
 <svg class="bob" font-family="arial" font-size="14" height="240" width="544" xmlns="http://www.w3.org/2000/svg">
 <defs>
 <marker id="triangle" markerHeight="8" markerWidth="8" orient="auto" refX="4" refY="2" viewBox="0 0 8 4">
-<polygon fill="black" points="0,0 0,4 8,2 0,0"/>
+<polygon class="fg_fill" points="0,0 0,4 8,2 0,0"/>
 </marker>
 <marker id="clear_triangle" markerHeight="10" markerWidth="10" orient="auto" refX="1" refY="7" viewBox="0 0 20 14">
-<polygon fill="none" points="2,2 2,12 18,7 2,2" stroke="black" stroke-width="2"/>
+<polygon class="bg_fill" points="2,2 2,12 18,7 2,2"/>
 </marker>
 <marker id="circle" markerHeight="5" markerWidth="5" orient="auto" refX="10" refY="10" viewBox="0 0 20 20">
-<circle cx="10" cy="10" fill="black" r="8"/>
+<circle class="fg_fill" cx="10" cy="10" r="8"/>
 </marker>
 <marker id="square" markerHeight="5" markerWidth="5" orient="auto" refX="10" refY="10" viewBox="0 0 20 20">
-<rect fill="black" height="20" width="20" x="0" y="0"/>
+<rect class="fg_fill" height="20" width="20" x="0" y="0"/>
 </marker>
 <marker id="open_circle" markerHeight="10" markerWidth="10" orient="auto" refX="10" refY="10" viewBox="0 0 20 20">
-<circle cx="10" cy="10" fill="white" r="4" stroke="black" stroke-width="2"/>
+<circle class="bg_fill" cx="10" cy="10" r="4"/>
 </marker>
 <marker id="big_open_circle" markerHeight="20" markerWidth="20" orient="auto" refX="20" refY="20" viewBox="0 0 40 40">
-<circle cx="20" cy="20" fill="white" r="6" stroke="black" stroke-width="2"/>
+<circle class="bg_fill" cx="20" cy="20" r="6"/>
 </marker>
 </defs>
 <style type="text/css">
 
-    line,path {
-      stroke: black;
-      stroke-width: 2;
-      stroke-opacity: 1;
-      fill-opacity: 1;
-      stroke-linecap: round;
-      stroke-linejoin: miter;
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-        stroke-dasharray: 5;
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-    circle.solid {
-      fill:black;
-      stroke: black;
-      stroke-width: 2;
-      stroke-opacity: 1;
-      fill-opacity: 1;
-      stroke-linecap: round;
-      stroke-linejoin: miter;
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-    circle.open {
-      fill:none;
-      stroke: black;
-      stroke-width: 2;
-      stroke-opacity: 1;
-      fill-opacity: 1;
-      stroke-linecap: round;
-      stroke-linejoin: miter;
-    }
-    tspan.head{
-        fill: none;
-        stroke: none;
-    }
+rect.backdrop {
+    fill: white;
+}
+text{
+    fill: black;
+}
+
+circle {
+    fill: none;
+    stroke: black;
+    stroke-width: 2;
+}
+
+line {
+    stroke: black;
+    stroke-width: 2;
+    stroke-opacity: 1;
+    fill-opacity: 1;
+    stroke-linecap: round;
+    stroke-linejoin: miter;
+}
+
+path {
+    fill: none;
+    stroke: black;
+    stroke-width: 2;
+    stroke-opacity: 1;
+    fill-opacity: 1;
+    stroke-linecap: round;
+    stroke-linejoin: miter;
+}
+
+line.dashed {
+    stroke-dasharray: 5;
+}
+
+.fg_fill {
+    fill: black;
+}
+
+
+.bg_fill {
+    fill: white;
+    stroke: black;
+    stroke-width: 2;
+}
+
+tspan.head{
+    fill: none;
+    stroke: none;
+}
     
 </style>
-<rect fill="white" height="240" width="544" x="0" y="0"/>
+<rect class="backdrop" height="240" width="544" x="0" y="0"/>
 <g>
 <line x1="4" x2="4" y1="104" y2="232"/>
 <line x1="4" x2="108" y1="104" y2="104"/>
diff --git a/book/src/.gitbook/assets/data-plane.svg b/book/src/.gitbook/assets/data-plane.svg
index 5a33b8bf6e..5fa566eebd 100644
--- a/book/src/.gitbook/assets/data-plane.svg
+++ b/book/src/.gitbook/assets/data-plane.svg
@@ -1,62 +1,80 @@
 <svg class="bob" font-family="arial" font-size="14" height="288" width="736" xmlns="http://www.w3.org/2000/svg">
 <defs>
 <marker id="triangle" markerHeight="8" markerWidth="8" orient="auto" refX="4" refY="2" viewBox="0 0 8 4">
-<polygon fill="black" points="0,0 0,4 8,2 0,0"/>
+<polygon class="fg_fill" points="0,0 0,4 8,2 0,0"/>
 </marker>
 <marker id="clear_triangle" markerHeight="10" markerWidth="10" orient="auto" refX="1" refY="7" viewBox="0 0 20 14">
-<polygon fill="none" points="2,2 2,12 18,7 2,2" stroke="black" stroke-width="2"/>
+<polygon class="bg_fill" points="2,2 2,12 18,7 2,2"/>
 </marker>
 <marker id="circle" markerHeight="5" markerWidth="5" orient="auto" refX="10" refY="10" viewBox="0 0 20 20">
-<circle cx="10" cy="10" fill="black" r="8"/>
+<circle class="fg_fill" cx="10" cy="10" r="8"/>
 </marker>
 <marker id="square" markerHeight="5" markerWidth="5" orient="auto" refX="10" refY="10" viewBox="0 0 20 20">
-<rect fill="black" height="20" width="20" x="0" y="0"/>
+<rect class="fg_fill" height="20" width="20" x="0" y="0"/>
 </marker>
 <marker id="open_circle" markerHeight="10" markerWidth="10" orient="auto" refX="10" refY="10" viewBox="0 0 20 20">
-<circle cx="10" cy="10" fill="white" r="4" stroke="black" stroke-width="2"/>
+<circle class="bg_fill" cx="10" cy="10" r="4"/>
 </marker>
 <marker id="big_open_circle" markerHeight="20" markerWidth="20" orient="auto" refX="20" refY="20" viewBox="0 0 40 40">
-<circle cx="20" cy="20" fill="white" r="6" stroke="black" stroke-width="2"/>
+<circle class="bg_fill" cx="20" cy="20" r="6"/>
 </marker>
 </defs>
 <style type="text/css">
 
-    line,path {
-      stroke: black;
-      stroke-width: 2;
-      stroke-opacity: 1;
-      fill-opacity: 1;
-      stroke-linecap: round;
-      stroke-linejoin: miter;
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-    line.dashed {
-        stroke-dasharray: 5;
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-    circle.solid {
-      fill:black;
-      stroke: black;
-      stroke-width: 2;
-      stroke-opacity: 1;
-      fill-opacity: 1;
-      stroke-linecap: round;
-      stroke-linejoin: miter;
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-    circle.open {
-      fill:none;
-      stroke: black;
-      stroke-width: 2;
-      stroke-opacity: 1;
-      fill-opacity: 1;
-      stroke-linecap: round;
-      stroke-linejoin: miter;
-    }
-    tspan.head{
-        fill: none;
-        stroke: none;
-    }
+rect.backdrop {
+    fill: white;
+}
+text{
+    fill: black;
+}
+
+circle {
+    fill: none;
+    stroke: black;
+    stroke-width: 2;
+}
+
+line {
+    stroke: black;
+    stroke-width: 2;
+    stroke-opacity: 1;
+    fill-opacity: 1;
+    stroke-linecap: round;
+    stroke-linejoin: miter;
+}
+
+path {
+    fill: none;
+    stroke: black;
+    stroke-width: 2;
+    stroke-opacity: 1;
+    fill-opacity: 1;
+    stroke-linecap: round;
+    stroke-linejoin: miter;
+}
+
+line.dashed {
+    stroke-dasharray: 5;
+}
+
+.fg_fill {
+    fill: black;
+}
+
+
+.bg_fill {
+    fill: white;
+    stroke: black;
+    stroke-width: 2;
+}
+
+tspan.head{
+    fill: none;
+    stroke: none;
+}
     
 </style>
-<rect fill="white" height="288" width="736" x="0" y="0"/>
+<rect class="backdrop" height="288" width="736" x="0" y="0"/>
 <g>
 <line x1="4" x2="4" y1="216" y2="280"/>
 <line x1="4" x2="156" y1="216" y2="216"/>
diff --git a/book/src/.gitbook/assets/fork-generation.svg b/book/src/.gitbook/assets/fork-generation.svg
index 3d13d7549b..096f643c15 100644
--- a/book/src/.gitbook/assets/fork-generation.svg
+++ b/book/src/.gitbook/assets/fork-generation.svg
@@ -1,62 +1,80 @@
 <svg class="bob" font-family="arial" font-size="14" height="208" width="768" xmlns="http://www.w3.org/2000/svg">
 <defs>
 <marker id="triangle" markerHeight="8" markerWidth="8" orient="auto" refX="4" refY="2" viewBox="0 0 8 4">
-<polygon fill="black" points="0,0 0,4 8,2 0,0"/>
+<polygon class="fg_fill" points="0,0 0,4 8,2 0,0"/>
 </marker>
 <marker id="clear_triangle" markerHeight="10" markerWidth="10" orient="auto" refX="1" refY="7" viewBox="0 0 20 14">
-<polygon fill="none" points="2,2 2,12 18,7 2,2" stroke="black" stroke-width="2"/>
+<polygon class="bg_fill" points="2,2 2,12 18,7 2,2"/>
 </marker>
 <marker id="circle" markerHeight="5" markerWidth="5" orient="auto" refX="10" refY="10" viewBox="0 0 20 20">
-<circle cx="10" cy="10" fill="black" r="8"/>
+<circle class="fg_fill" cx="10" cy="10" r="8"/>
 </marker>
 <marker id="square" markerHeight="5" markerWidth="5" orient="auto" refX="10" refY="10" viewBox="0 0 20 20">
-<rect fill="black" height="20" width="20" x="0" y="0"/>
+<rect class="fg_fill" height="20" width="20" x="0" y="0"/>
 </marker>
 <marker id="open_circle" markerHeight="10" markerWidth="10" orient="auto" refX="10" refY="10" viewBox="0 0 20 20">
-<circle cx="10" cy="10" fill="white" r="4" stroke="black" stroke-width="2"/>
+<circle class="bg_fill" cx="10" cy="10" r="4"/>
 </marker>
 <marker id="big_open_circle" markerHeight="20" markerWidth="20" orient="auto" refX="20" refY="20" viewBox="0 0 40 40">
-<circle cx="20" cy="20" fill="white" r="6" stroke="black" stroke-width="2"/>
+<circle class="bg_fill" cx="20" cy="20" r="6"/>
 </marker>
 </defs>
 <style type="text/css">
 
-    line,path {
-      stroke: black;
-      stroke-width: 2;
-      stroke-opacity: 1;
-      fill-opacity: 1;
-      stroke-linecap: round;
-      stroke-linejoin: miter;
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-    circle.solid {
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-      stroke: black;
-      stroke-width: 2;
-      stroke-opacity: 1;
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-      stroke-linecap: round;
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-      stroke-opacity: 1;
-      fill-opacity: 1;
-      stroke-linecap: round;
-      stroke-linejoin: miter;
-    }
-    tspan.head{
-        fill: none;
-        stroke: none;
-    }
+rect.backdrop {
+    fill: white;
+}
+text{
+    fill: black;
+}
+
+circle {
+    fill: none;
+    stroke: black;
+    stroke-width: 2;
+}
+
+line {
+    stroke: black;
+    stroke-width: 2;
+    stroke-opacity: 1;
+    fill-opacity: 1;
+    stroke-linecap: round;
+    stroke-linejoin: miter;
+}
+
+path {
+    fill: none;
+    stroke: black;
+    stroke-width: 2;
+    stroke-opacity: 1;
+    fill-opacity: 1;
+    stroke-linecap: round;
+    stroke-linejoin: miter;
+}
+
+line.dashed {
+    stroke-dasharray: 5;
+}
+
+.fg_fill {
+    fill: black;
+}
+
+
+.bg_fill {
+    fill: white;
+    stroke: black;
+    stroke-width: 2;
+}
+
+tspan.head{
+    fill: none;
+    stroke: none;
+}
     
 </style>
-<rect fill="white" height="208" width="768" x="0" y="0"/>
+<rect class="backdrop" height="208" width="768" x="0" y="0"/>
 <g>
 <line marker-end="url(#triangle)" x1="76" x2="76" y1="32" y2="172"/>
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diff --git a/book/src/.gitbook/assets/forks-pruned.svg b/book/src/.gitbook/assets/forks-pruned.svg
index 5a8f41f21c..59819eb241 100644
--- a/book/src/.gitbook/assets/forks-pruned.svg
+++ b/book/src/.gitbook/assets/forks-pruned.svg
@@ -1,62 +1,80 @@
 <svg class="bob" font-family="arial" font-size="14" height="144" width="48" xmlns="http://www.w3.org/2000/svg">
 <defs>
 <marker id="triangle" markerHeight="8" markerWidth="8" orient="auto" refX="4" refY="2" viewBox="0 0 8 4">
-<polygon fill="black" points="0,0 0,4 8,2 0,0"/>
+<polygon class="fg_fill" points="0,0 0,4 8,2 0,0"/>
 </marker>
 <marker id="clear_triangle" markerHeight="10" markerWidth="10" orient="auto" refX="1" refY="7" viewBox="0 0 20 14">
-<polygon fill="none" points="2,2 2,12 18,7 2,2" stroke="black" stroke-width="2"/>
+<polygon class="bg_fill" points="2,2 2,12 18,7 2,2"/>
 </marker>
 <marker id="circle" markerHeight="5" markerWidth="5" orient="auto" refX="10" refY="10" viewBox="0 0 20 20">
-<circle cx="10" cy="10" fill="black" r="8"/>
+<circle class="fg_fill" cx="10" cy="10" r="8"/>
 </marker>
 <marker id="square" markerHeight="5" markerWidth="5" orient="auto" refX="10" refY="10" viewBox="0 0 20 20">
-<rect fill="black" height="20" width="20" x="0" y="0"/>
+<rect class="fg_fill" height="20" width="20" x="0" y="0"/>
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+}
+text{
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+}
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+}
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+}
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+}
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+}
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+}
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+}
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+}
     
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index f57f691d73..a550b81728 100644
--- a/book/src/.gitbook/assets/forks-pruned2.svg
+++ b/book/src/.gitbook/assets/forks-pruned2.svg
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-<polygon fill="black" points="0,0 0,4 8,2 0,0"/>
+<polygon class="fg_fill" points="0,0 0,4 8,2 0,0"/>
 </marker>
 <marker id="clear_triangle" markerHeight="10" markerWidth="10" orient="auto" refX="1" refY="7" viewBox="0 0 20 14">
-<polygon fill="none" points="2,2 2,12 18,7 2,2" stroke="black" stroke-width="2"/>
+<polygon class="bg_fill" points="2,2 2,12 18,7 2,2"/>
 </marker>
 <marker id="circle" markerHeight="5" markerWidth="5" orient="auto" refX="10" refY="10" viewBox="0 0 20 20">
-<circle cx="10" cy="10" fill="black" r="8"/>
+<circle class="fg_fill" cx="10" cy="10" r="8"/>
 </marker>
 <marker id="square" markerHeight="5" markerWidth="5" orient="auto" refX="10" refY="10" viewBox="0 0 20 20">
-<rect fill="black" height="20" width="20" x="0" y="0"/>
+<rect class="fg_fill" height="20" width="20" x="0" y="0"/>
 </marker>
 <marker id="open_circle" markerHeight="10" markerWidth="10" orient="auto" refX="10" refY="10" viewBox="0 0 20 20">
-<circle cx="10" cy="10" fill="white" r="4" stroke="black" stroke-width="2"/>
+<circle class="bg_fill" cx="10" cy="10" r="4"/>
 </marker>
 <marker id="big_open_circle" markerHeight="20" markerWidth="20" orient="auto" refX="20" refY="20" viewBox="0 0 40 40">
-<circle cx="20" cy="20" fill="white" r="6" stroke="black" stroke-width="2"/>
+<circle class="bg_fill" cx="20" cy="20" r="6"/>
 </marker>
 </defs>
 <style type="text/css">
 
-    line,path {
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-      stroke-width: 2;
-      stroke-opacity: 1;
-      fill-opacity: 1;
-      stroke-linecap: round;
-      stroke-linejoin: miter;
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-      stroke-linecap: round;
-      stroke-linejoin: miter;
-    }
-    tspan.head{
-        fill: none;
-        stroke: none;
-    }
+rect.backdrop {
+    fill: white;
+}
+text{
+    fill: black;
+}
+
+circle {
+    fill: none;
+    stroke: black;
+    stroke-width: 2;
+}
+
+line {
+    stroke: black;
+    stroke-width: 2;
+    stroke-opacity: 1;
+    fill-opacity: 1;
+    stroke-linecap: round;
+    stroke-linejoin: miter;
+}
+
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+    fill: none;
+    stroke: black;
+    stroke-width: 2;
+    stroke-opacity: 1;
+    fill-opacity: 1;
+    stroke-linecap: round;
+    stroke-linejoin: miter;
+}
+
+line.dashed {
+    stroke-dasharray: 5;
+}
+
+.fg_fill {
+    fill: black;
+}
+
+
+.bg_fill {
+    fill: white;
+    stroke: black;
+    stroke-width: 2;
+}
+
+tspan.head{
+    fill: none;
+    stroke: none;
+}
     
 </style>
-<rect fill="white" height="176" width="40" x="0" y="0"/>
+<rect class="backdrop" height="176" width="40" x="0" y="0"/>
 <g>
 <line x1="12" x2="12" y1="16" y2="32"/>
 </g>
diff --git a/book/src/.gitbook/assets/forks.svg b/book/src/.gitbook/assets/forks.svg
index 725a73f5d3..e57f128fca 100644
--- a/book/src/.gitbook/assets/forks.svg
+++ b/book/src/.gitbook/assets/forks.svg
@@ -1,62 +1,80 @@
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-<polygon fill="black" points="0,0 0,4 8,2 0,0"/>
+<polygon class="fg_fill" points="0,0 0,4 8,2 0,0"/>
 </marker>
 <marker id="clear_triangle" markerHeight="10" markerWidth="10" orient="auto" refX="1" refY="7" viewBox="0 0 20 14">
-<polygon fill="none" points="2,2 2,12 18,7 2,2" stroke="black" stroke-width="2"/>
+<polygon class="bg_fill" points="2,2 2,12 18,7 2,2"/>
 </marker>
 <marker id="circle" markerHeight="5" markerWidth="5" orient="auto" refX="10" refY="10" viewBox="0 0 20 20">
-<circle cx="10" cy="10" fill="black" r="8"/>
+<circle class="fg_fill" cx="10" cy="10" r="8"/>
 </marker>
 <marker id="square" markerHeight="5" markerWidth="5" orient="auto" refX="10" refY="10" viewBox="0 0 20 20">
-<rect fill="black" height="20" width="20" x="0" y="0"/>
+<rect class="fg_fill" height="20" width="20" x="0" y="0"/>
 </marker>
 <marker id="open_circle" markerHeight="10" markerWidth="10" orient="auto" refX="10" refY="10" viewBox="0 0 20 20">
-<circle cx="10" cy="10" fill="white" r="4" stroke="black" stroke-width="2"/>
+<circle class="bg_fill" cx="10" cy="10" r="4"/>
 </marker>
 <marker id="big_open_circle" markerHeight="20" markerWidth="20" orient="auto" refX="20" refY="20" viewBox="0 0 40 40">
-<circle cx="20" cy="20" fill="white" r="6" stroke="black" stroke-width="2"/>
+<circle class="bg_fill" cx="20" cy="20" r="6"/>
 </marker>
 </defs>
 <style type="text/css">
 
-    line,path {
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-      stroke-width: 2;
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-      stroke-linejoin: miter;
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-      stroke: black;
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-      stroke: black;
-      stroke-width: 2;
-      stroke-opacity: 1;
-      fill-opacity: 1;
-      stroke-linecap: round;
-      stroke-linejoin: miter;
-    }
-    tspan.head{
-        fill: none;
-        stroke: none;
-    }
+rect.backdrop {
+    fill: white;
+}
+text{
+    fill: black;
+}
+
+circle {
+    fill: none;
+    stroke: black;
+    stroke-width: 2;
+}
+
+line {
+    stroke: black;
+    stroke-width: 2;
+    stroke-opacity: 1;
+    fill-opacity: 1;
+    stroke-linecap: round;
+    stroke-linejoin: miter;
+}
+
+path {
+    fill: none;
+    stroke: black;
+    stroke-width: 2;
+    stroke-opacity: 1;
+    fill-opacity: 1;
+    stroke-linecap: round;
+    stroke-linejoin: miter;
+}
+
+line.dashed {
+    stroke-dasharray: 5;
+}
+
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+    fill: black;
+}
+
+
+.bg_fill {
+    fill: white;
+    stroke: black;
+    stroke-width: 2;
+}
+
+tspan.head{
+    fill: none;
+    stroke: none;
+}
     
 </style>
-<rect fill="white" height="208" width="96" x="0" y="0"/>
+<rect class="backdrop" height="208" width="96" x="0" y="0"/>
 <g>
 <line x1="20" x2="24" y1="88" y2="80"/>
 <line x1="20" x2="20" y1="96" y2="88"/>
diff --git a/book/src/.gitbook/assets/runtime.svg b/book/src/.gitbook/assets/runtime.svg
index 0a9b8289b2..c2be790703 100644
--- a/book/src/.gitbook/assets/runtime.svg
+++ b/book/src/.gitbook/assets/runtime.svg
@@ -1,90 +1,108 @@
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 <defs>
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-<polygon fill="black" points="0,0 0,4 8,2 0,0"/>
+<polygon class="fg_fill" points="0,0 0,4 8,2 0,0"/>
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 <marker id="clear_triangle" markerHeight="10" markerWidth="10" orient="auto" refX="1" refY="7" viewBox="0 0 20 14">
-<polygon fill="none" points="2,2 2,12 18,7 2,2" stroke="black" stroke-width="2"/>
+<polygon class="bg_fill" points="2,2 2,12 18,7 2,2"/>
 </marker>
 <marker id="circle" markerHeight="5" markerWidth="5" orient="auto" refX="10" refY="10" viewBox="0 0 20 20">
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+<circle class="fg_fill" cx="10" cy="10" r="8"/>
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 <marker id="square" markerHeight="5" markerWidth="5" orient="auto" refX="10" refY="10" viewBox="0 0 20 20">
-<rect fill="black" height="20" width="20" x="0" y="0"/>
+<rect class="fg_fill" height="20" width="20" x="0" y="0"/>
 </marker>
 <marker id="open_circle" markerHeight="10" markerWidth="10" orient="auto" refX="10" refY="10" viewBox="0 0 20 20">
-<circle cx="10" cy="10" fill="white" r="4" stroke="black" stroke-width="2"/>
+<circle class="bg_fill" cx="10" cy="10" r="4"/>
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-<circle cx="20" cy="20" fill="white" r="6" stroke="black" stroke-width="2"/>
+<circle class="bg_fill" cx="20" cy="20" r="6"/>
 </marker>
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-      stroke-linecap: round;
-      stroke-linejoin: miter;
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-    tspan.head{
-        fill: none;
-        stroke: none;
-    }
+rect.backdrop {
+    fill: white;
+}
+text{
+    fill: black;
+}
+
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+    fill: none;
+    stroke: black;
+    stroke-width: 2;
+}
+
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+    stroke: black;
+    stroke-width: 2;
+    stroke-opacity: 1;
+    fill-opacity: 1;
+    stroke-linecap: round;
+    stroke-linejoin: miter;
+}
+
+path {
+    fill: none;
+    stroke: black;
+    stroke-width: 2;
+    stroke-opacity: 1;
+    fill-opacity: 1;
+    stroke-linecap: round;
+    stroke-linejoin: miter;
+}
+
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+    stroke-dasharray: 5;
+}
+
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+    fill: black;
+}
+
+
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+    fill: white;
+    stroke: black;
+    stroke-width: 2;
+}
+
+tspan.head{
+    fill: none;
+    stroke: none;
+}
     
 </style>
-<rect fill="white" height="160" width="848" x="0" y="0"/>
+<rect class="backdrop" height="160" width="848" x="0" y="0"/>
 <g>
 <line marker-end="url(#triangle)" x1="0" x2="28" y1="104" y2="104"/>
 </g>
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index 629a3feaa3..8903c46700 100644
--- a/book/src/.gitbook/assets/sdk-tools.svg
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-<polygon fill="black" points="0,0 0,4 8,2 0,0"/>
+<polygon class="fg_fill" points="0,0 0,4 8,2 0,0"/>
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-<polygon fill="none" points="2,2 2,12 18,7 2,2" stroke="black" stroke-width="2"/>
+<polygon class="bg_fill" points="2,2 2,12 18,7 2,2"/>
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 <marker id="circle" markerHeight="5" markerWidth="5" orient="auto" refX="10" refY="10" viewBox="0 0 20 20">
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+<circle class="fg_fill" cx="10" cy="10" r="8"/>
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+<circle class="bg_fill" cx="20" cy="20" r="6"/>
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-        fill: none;
-        stroke: none;
-    }
+rect.backdrop {
+    fill: white;
+}
+text{
+    fill: black;
+}
+
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+    fill: none;
+    stroke: black;
+    stroke-width: 2;
+}
+
+line {
+    stroke: black;
+    stroke-width: 2;
+    stroke-opacity: 1;
+    fill-opacity: 1;
+    stroke-linecap: round;
+    stroke-linejoin: miter;
+}
+
+path {
+    fill: none;
+    stroke: black;
+    stroke-width: 2;
+    stroke-opacity: 1;
+    fill-opacity: 1;
+    stroke-linecap: round;
+    stroke-linejoin: miter;
+}
+
+line.dashed {
+    stroke-dasharray: 5;
+}
+
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+    fill: black;
+}
+
+
+.bg_fill {
+    fill: white;
+    stroke: black;
+    stroke-width: 2;
+}
+
+tspan.head{
+    fill: none;
+    stroke: none;
+}
     
 </style>
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+<rect class="backdrop" height="320" width="560" x="0" y="0"/>
 <g>
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+<path d="M 20 196 A 4 4 0 0 0 24 200"/>
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index a07908d17e..3962b10807 100644
--- a/book/src/.gitbook/assets/spv-bank-merkle.svg
+++ b/book/src/.gitbook/assets/spv-bank-merkle.svg
@@ -1,62 +1,80 @@
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-<polygon fill="black" points="0,0 0,4 8,2 0,0"/>
+<polygon class="fg_fill" points="0,0 0,4 8,2 0,0"/>
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-<polygon fill="none" points="2,2 2,12 18,7 2,2" stroke="black" stroke-width="2"/>
+<polygon class="bg_fill" points="2,2 2,12 18,7 2,2"/>
 </marker>
 <marker id="circle" markerHeight="5" markerWidth="5" orient="auto" refX="10" refY="10" viewBox="0 0 20 20">
-<circle cx="10" cy="10" fill="black" r="8"/>
+<circle class="fg_fill" cx="10" cy="10" r="8"/>
 </marker>
 <marker id="square" markerHeight="5" markerWidth="5" orient="auto" refX="10" refY="10" viewBox="0 0 20 20">
-<rect fill="black" height="20" width="20" x="0" y="0"/>
+<rect class="fg_fill" height="20" width="20" x="0" y="0"/>
 </marker>
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-<circle cx="10" cy="10" fill="white" r="4" stroke="black" stroke-width="2"/>
+<circle class="bg_fill" cx="10" cy="10" r="4"/>
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+<circle class="bg_fill" cx="20" cy="20" r="6"/>
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-    line,path {
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-        stroke: none;
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+rect.backdrop {
+    fill: white;
+}
+text{
+    fill: black;
+}
+
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+    fill: none;
+    stroke: black;
+    stroke-width: 2;
+}
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+    stroke-width: 2;
+    stroke-opacity: 1;
+    fill-opacity: 1;
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+}
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+}
+
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+}
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+}
+
+
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+    fill: white;
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+    stroke-width: 2;
+}
+
+tspan.head{
+    fill: none;
+    stroke: none;
+}
     
 </style>
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+<rect class="backdrop" height="288" width="432" x="0" y="0"/>
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index 18ea80cadd..9d5805ca28 100644
--- a/book/src/.gitbook/assets/spv-block-merkle.svg
+++ b/book/src/.gitbook/assets/spv-block-merkle.svg
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+<polygon class="bg_fill" points="2,2 2,12 18,7 2,2"/>
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+<circle class="bg_fill" cx="20" cy="20" r="6"/>
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+}
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+}
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+}
+
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+}
     
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index 1de96c7927..633ea5eb95 100644
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