Use CC0 tileset gravestone PNG instead of CSS-drawn stone

Stone extracted from OpenGameArt's 'Free Graveyard Platformer Tileset'
(CC0) vector sheet, rendered at high res and tinted slate-purple to
match the gothic palette. Moss overlay is now masked by the stone's own
silhouette; skull and R.I.P. engraving stay as overlays.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015HtPHsTnDcLVSCiF5FGHZj

plugin/contents/ui/dancer.html

@@ -1285,51 +1285,33 @@ body.dia:not(.balada):not(.chuva) .grave-wrap { opacity: 1; }
   box-shadow: inset 0 0.7vh 1.2vh rgba(225,232,190,0.20);
 }
 
-/* pedra gótica: arco ogival, ardósia escura, torta e comida pelo tempo */
+/* pedra gótica: PNG do tileset CC0 de cemitério (OpenGameArt), tingido
+   de ardósia arroxeada em tools — ver gravestone.png */
 .gravestone {
   position: relative;
-  width: 15vh;
+  width: 17vh;
-  height: 21vh;
+  height: 17.3vh;  /* aspecto do PNG 195x198 */
-  transform: rotate(-2.5deg);
+  background: url('gravestone.png') center / contain no-repeat;
-  clip-path: polygon(50% 0%, 60% 2%, 71% 8%, 81% 18%, 88% 32%, 91% 50%,
-                     91% 100%, 9% 100%, 9% 50%, 12% 32%, 19% 18%, 29% 8%, 40% 2%);
-  background:
-    linear-gradient(115deg,
-      rgba(209,131,179,0.26) 0%, rgba(255,255,255,0.06) 34%,
-      rgba(8,5,18,0.50) 100%),
-    linear-gradient(to bottom, #4a4258 0%, #363048 55%, #241f34 100%);
-  box-shadow: inset 0 -1.4vh 2.4vh rgba(8,5,20,0.55);
   filter: drop-shadow(0 0 14px rgba(209,131,179,0.22));
 }
-/* musgo subindo pela base da pedra */
+/* musgo subindo pela base, recortado pela silhueta da pedra */
 .gravestone::before {
   content: '';
   position: absolute;
   inset: 0;
   background:
-    radial-gradient(circle at 18% 102%, rgba(74,105,60,0.60), transparent 42%),
+    radial-gradient(circle at 18% 96%, rgba(74,105,60,0.60), transparent 40%),
-    radial-gradient(circle at 78% 103%, rgba(58,88,46,0.50), transparent 38%),
+    radial-gradient(circle at 80% 97%, rgba(58,88,46,0.50), transparent 36%),
-    radial-gradient(circle at 50% 108%, rgba(66,96,52,0.40), transparent 50%);
+    radial-gradient(circle at 50% 100%, rgba(66,96,52,0.42), transparent 46%);
-}
+  -webkit-mask: url('gravestone.png') center / contain no-repeat;
-/* rachadura descendo do arco */
+  mask: url('gravestone.png') center / contain no-repeat;
-.gravestone::after {
-  content: '';
-  position: absolute;
-  top: 7%;
-  left: 30%;
-  width: 0.35vh;
-  height: 30%;
-  transform: rotate(16deg);
-  border-radius: 1px;
-  background: rgba(8,5,20,0.60);
-  box-shadow: 1px 0 0 rgba(255,255,255,0.07);
 }
 .grave-skull {
   position: absolute;
-  top: 13%;
+  top: 9%;
   width: 100%;
   text-align: center;
-  font-size: 3.4vh;
+  font-size: 3.2vh;
   color: #8d81a8;
   text-shadow: 0 1px 0 rgba(255,255,255,0.16), 0 -1px 1px rgba(0,0,0,0.70);
 }
@@ -1341,21 +1323,21 @@ body.dia:not(.balada):not(.chuva) .grave-wrap { opacity: 1; }
   text-align: center;
   font-family: Georgia, 'Times New Roman', serif;
   font-weight: bold;
-  font-size: 2.7vh;
+  font-size: 2.4vh;
-  letter-spacing: 0.42vh;
+  letter-spacing: 0.4vh;
   color: #9187ae;
   text-shadow: 0 1px 0 rgba(255,255,255,0.20), 0 -1px 1px rgba(5,3,14,0.80);
 }
 .grave-line {
   position: absolute;
-  top: 52%;
+  top: 51%;
-  left: 24%; right: 24%;
+  left: 26%; right: 26%;
   height: 0.5vh;
   border-radius: 0.3vh;
   background: rgba(14,10,30,0.62);
   box-shadow: 0 1px 0 rgba(255,255,255,0.14);
 }
-.grave-line.short { top: 60%; left: 32%; right: 32%; }
+.grave-line.short { top: 59%; left: 33%; right: 33%; }
 
 /* tufos de capim para amarrar a base na cena */
 .grass-tuft {