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+     inkscape:cy="6.3489358"
+     inkscape:document-units="px"
+     inkscape:current-layer="layer1"
+     showgrid="true"
+     inkscape:window-width="1366"
+     inkscape:window-height="711"
+     inkscape:window-x="0"
+     inkscape:window-y="25"
+     inkscape:window-maximized="1">
+    <inkscape:grid
+       type="xygrid"
+       id="grid3006"
+       empspacing="5"
+       visible="true"
+       enabled="true"
+       snapvisiblegridlinesonly="true" />
+  </sodipodi:namedview>
+  <metadata
+     id="metadata7">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Ebene 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(0,-1036.3622)">
+    <path
+       sodipodi:type="arc"
+       style="fill:#f9f9f9;fill-opacity:1;stroke:none"
+       id="path3800"
+       sodipodi:cx="8"
+       sodipodi:cy="8"
+       sodipodi:rx="7"
+       sodipodi:ry="7"
+       d="m 15,8 c 0,3.865993 -3.134007,7 -7,7 C 4.1340068,15 1,11.865993 1,8 1,4.1340068 4.1340068,1 8,1 c 3.865993,0 7,3.1340068 7,7 z"
+       transform="translate(0,1036.3622)" />
+    <path
+       style="opacity:1;fill:#ada9a8;fill-opacity:1;stroke:none"
+       d="M 8 0 C 3.581722 8.8817842e-16 -3.006854e-17 3.581722 0 8 C 0 12.418278 3.581722 16 8 16 C 12.418278 16 16 12.418278 16 8 C 16 3.581722 12.418278 -1.8064254e-15 8 0 z M 8 1 C 11.865993 1 15 4.1340068 15 8 C 15 11.865993 11.865993 15 8 15 C 4.1340068 15 1 11.865993 1 8 C 1 4.1340068 4.1340068 1 8 1 z "
+       transform="translate(0,1036.3622)"
+       id="path3008" />
+  </g>
+</svg>
diff --git a/gtk-3.0/gtk-widgets-assets-dark.css b/gtk-3.0/gtk-widgets-assets-dark.css
index ecf1549..eac1419 100644
--- a/gtk-3.0/gtk-widgets-assets-dark.css
+++ b/gtk-3.0/gtk-widgets-assets-dark.css
@@ -5,118 +5,118 @@
 .check,
 .check row:selected,
 .check row:selected:focus {
-    background-image: url("assets/checkbox-unchecked-dark.png");
+    background-image: url("assets/checkbox-unchecked-dark.svg");
 }
 
 .check:insensitive,
 .check row:selected:insensitive,
 .check row:selected:focus:insensitive {
-    background-image: url("assets/checkbox-unchecked-insensitive-dark.png");
+    background-image: url("assets/checkbox-unchecked-insensitive-dark.svg");
 }
 
 .check:active,
 .check row:selected:active,
 .check row:selected:focus:active {
-    background-image: url("assets/checkbox-checked-dark.png");
+    background-image: url("assets/checkbox-checked-dark.svg");
 }
 
 .check:active:insensitive,
 .check row:selected:active:insensitive,
 .check row:selected:focus:active:insensitive {
-    background-image: url("assets/checkbox-checked-insensitive-dark.png");
+    background-image: url("assets/checkbox-checked-insensitive-dark.svg");
 }
 
 .check:inconsistent,
 .check row:selected:inconsistent,
 .check row:selected:focus:inconsistent {
-    background-image: url("assets/checkbox-mixed-dark.png");
+    background-image: url("assets/checkbox-mixed-dark.svg");
 }
 
 .check:inconsistent:insensitive,
 .check row:selected:inconsistent:insensitive,
 .check row:selected:focus:inconsistent:insensitive {
-    background-image: url("assets/checkbox-mixed-insensitive-dark.png");
+    background-image: url("assets/checkbox-mixed-insensitive-dark.svg");
 }
 
 .radio,
 .radio row:selected,
 .radio row:selected:focus {
-    background-image: url("assets/radio-unselected-dark.png");
+    background-image: url("assets/radio-unselected-dark.svg");
 }
 
 .radio:insensitive,
 .radio row:selected:insensitive,
 .radio row:selected:focus:insensitive {
-    background-image: url("assets/radio-unselected-insensitive-dark.png");
+    background-image: url("assets/radio-unselected-insensitive-dark.svg");
 }
 
 .radio:active,
 .radio row:selected:active,
 .radio row:selected:focus:active {
-    background-image: url("assets/radio-selected-dark.png");
+    background-image: url("assets/radio-selected-dark.svg");
 }
 
 .radio:active:insensitive,
 .radio row:selected:active:insensitive,
 .radio row:selected:focus:active:insensitive {
-    background-image: url("assets/radio-selected-insensitive-dark.png");
+    background-image: url("assets/radio-selected-insensitive-dark.svg");
 }
 
 .radio:inconsistent,
 .radio row:selected:inconsistent,
 .radio row:selected:focus:inconsistent {
-    background-image: url("assets/radio-mixed-dark.png");
+    background-image: url("assets/radio-mixed-dark.svg");
 }
 
 .radio:inconsistent:insensitive,
 .radio row:selected:inconsistent:insensitive,
 .radio row:selected:focus:inconsistent:insensitive {
-    background-image: url("assets/radio-mixed-insensitive-dark.png");
+    background-image: url("assets/radio-mixed-insensitive-dark.svg");
 }
 
 .menuitem.check:active {
-    background-image: url("assets/menuitem-checkbox-checked.png");
+    background-image: url("assets/menuitem-checkbox-checked.svg");
 }
 
 .menuitem.check:active:hover {
-    background-image: url("assets/menuitem-checkbox-checked-hover.png");
+    background-image: url("assets/menuitem-checkbox-checked-hover.svg");
 }
 
 .menuitem.check:active:insensitive {
-    background-image: url("assets/menuitem-checkbox-checked-insensitive.png");
+    background-image: url("assets/menuitem-checkbox-checked-insensitive.svg");
 }
 
 .menuitem.check:inconsistent:hover,
 .menuitem.radio:inconsistent:hover {
-    background-image: url("assets/menuitem-checkbox-mixed-hover.png");
+    background-image: url("assets/menuitem-checkbox-mixed-hover.svg");
 }
 
 .menuitem.check:inconsistent,
 .menuitem.radio:inconsistent {
-    background-image: url("assets/menuitem-checkbox-mixed.png");
+    background-image: url("assets/menuitem-checkbox-mixed.svg");
 }
 
 .menuitem.check:inconsistent:insensitive,
 .menuitem.radio:inconsistent:insensitive {
-    background-image: url("assets/menuitem-checkbox-mixed-insensitive.png");
+    background-image: url("assets/menuitem-checkbox-mixed-insensitive.svg");
 }
 
 .menuitem.radio:active {
-    background-image: url("assets/menuitem-radio-checked.png");
+    background-image: url("assets/menuitem-radio-checked.svg");
 }
 
 .menuitem.radio:active:hover {
-    background-image: url("assets/menuitem-radio-checked-hover.png");
+    background-image: url("assets/menuitem-radio-checked-hover.svg");
 }
 
 .menuitem.radio:active:insensitive {
-    background-image: url("assets/menuitem-radio-checked-insensitive.png");
+    background-image: url("assets/menuitem-radio-checked-insensitive.svg");
 }
 
 GtkIconView.content-view.cell.check {
-    background-image: url("assets/grid-selection-unchecked-dark.png");
+    background-image: url("assets/grid-selection-unchecked-dark.svg");
 }
 
 GtkIconView.content-view.cell.check:active {
-    background-image: url("assets/grid-selection-checked-dark.png");
+    background-image: url("assets/grid-selection-checked-dark.svg");
 }
diff --git a/gtk-3.0/gtk-widgets-assets.css b/gtk-3.0/gtk-widgets-assets.css
index cf1fd56..1cf65c2 100644
--- a/gtk-3.0/gtk-widgets-assets.css
+++ b/gtk-3.0/gtk-widgets-assets.css
@@ -5,118 +5,118 @@
 .check,
 .check row:selected,
 .check row:selected:focus {
-    background-image: url("assets/checkbox-unchecked.png");
+    background-image: url("assets/checkbox-unchecked.svg");
 }
 
 .check:insensitive,
 .check row:selected:insensitive,
 .check row:selected:focus:insensitive {
-    background-image: url("assets/checkbox-unchecked-insensitive.png");
+    background-image: url("assets/checkbox-unchecked-insensitive.svg");
 }
 
 .check:active,
 .check row:selected:active,
 .check row:selected:focus:active {
-    background-image: url("assets/checkbox-checked.png");
+    background-image: url("assets/checkbox-checked.svg");
 }
 
 .check:active:insensitive,
 .check row:selected:active:insensitive,
 .check row:selected:focus:active:insensitive {
-    background-image: url("assets/checkbox-checked-insensitive.png");
+    background-image: url("assets/checkbox-checked-insensitive.svg");
 }
 
 .check:inconsistent,
 .check row:selected:inconsistent,
 .check row:selected:focus:inconsistent {
-    background-image: url("assets/checkbox-mixed.png");
+    background-image: url("assets/checkbox-mixed.svg");
 }
 
 .check:inconsistent:insensitive,
 .check row:selected:inconsistent:insensitive,
 .check row:selected:focus:inconsistent:insensitive {
-    background-image: url("assets/checkbox-mixed-insensitive.png");
+    background-image: url("assets/checkbox-mixed-insensitive.svg");
 }
 
 .radio,
 .radio row:selected,
 .radio row:selected:focus {
-    background-image: url("assets/radio-unselected.png");
+    background-image: url("assets/radio-unselected.svg");
 }
 
 .radio:insensitive,
 .radio row:selected:insensitive,
 .radio row:selected:focus:insensitive {
-    background-image: url("assets/radio-unselected-insensitive.png");
+    background-image: url("assets/radio-unselected-insensitive.svg");
 }
 
 .radio:active,
 .radio row:selected:active,
 .radio row:selected:focus:active {
-    background-image: url("assets/radio-selected.png");
+    background-image: url("assets/radio-selected.svg");
 }
 
 .radio:active:insensitive,
 .radio row:selected:active:insensitive,
 .radio row:selected:focus:active:insensitive {
-    background-image: url("assets/radio-selected-insensitive.png");
+    background-image: url("assets/radio-selected-insensitive.svg");
 }
 
 .radio:inconsistent,
 .radio row:selected:inconsistent,
 .radio row:selected:focus:inconsistent {
-    background-image: url("assets/radio-mixed.png");
+    background-image: url("assets/radio-mixed.svg");
 }
 
 .radio:inconsistent:insensitive,
 .radio row:selected:inconsistent:insensitive,
 .radio row:selected:focus:inconsistent:insensitive {
-    background-image: url("assets/radio-mixed-insensitive.png");
+    background-image: url("assets/radio-mixed-insensitive.svg");
 }
 
 .menuitem.check:active {
-    background-image: url("assets/menuitem-checkbox-checked.png");
+    background-image: url("assets/menuitem-checkbox-checked.svg");
 }
 
 .menuitem.check:active:hover {
-    background-image: url("assets/menuitem-checkbox-checked-hover.png");
+    background-image: url("assets/menuitem-checkbox-checked-hover.svg");
 }
 
 .menuitem.check:active:insensitive {
-    background-image: url("assets/menuitem-checkbox-checked-insensitive.png");
+    background-image: url("assets/menuitem-checkbox-checked-insensitive.svg");
 }
 
 .menuitem.check:inconsistent:hover,
 .menuitem.radio:inconsistent:hover {
-    background-image: url("assets/menuitem-checkbox-mixed-hover.png");
+    background-image: url("assets/menuitem-checkbox-mixed-hover.svg");
 }
 
 .menuitem.check:inconsistent,
 .menuitem.radio:inconsistent {
-    background-image: url("assets/menuitem-checkbox-mixed.png");
+    background-image: url("assets/menuitem-checkbox-mixed.svg");
 }
 
 .menuitem.check:inconsistent:insensitive,
 .menuitem.radio:inconsistent:insensitive {
-    background-image: url("assets/menuitem-checkbox-mixed-insensitive.png");
+    background-image: url("assets/menuitem-checkbox-mixed-insensitive.svg");
 }
 
 .menuitem.radio:active {
-    background-image: url("assets/menuitem-radio-checked.png");
+    background-image: url("assets/menuitem-radio-checked.svg");
 }
 
 .menuitem.radio:active:hover {
-    background-image: url("assets/menuitem-radio-checked-hover.png");
+    background-image: url("assets/menuitem-radio-checked-hover.svg");
 }
 
 .menuitem.radio:active:insensitive {
-    background-image: url("assets/menuitem-radio-checked-insensitive.png");
+    background-image: url("assets/menuitem-radio-checked-insensitive.svg");
 }
 
 GtkIconView.content-view.cell.check {
-    background-image: url("assets/grid-selection-unchecked.png");
+    background-image: url("assets/grid-selection-unchecked.svg");
 }
 
 GtkIconView.content-view.cell.check:active {
-    background-image: url("assets/grid-selection-checked.png");
+    background-image: url("assets/grid-selection-checked.svg");
 }