/* Stage 6.36: straight timber edges with tangent, softly rounded corners.
   The 2px reference rim is retained. Matching fill masks remove the old
   undulating silhouette, not merely blur it. No layout or hit-box changes. */
#game-world .island-plate::after,
#game-world .vault-plate::after{
 content:"";position:absolute;inset:0;pointer-events:none;z-index:0;
 background:url('../../assets/ui636/title-timber-edge-straight.webp') center/100% 100% no-repeat;
}
#game-world .island-plate::before,
#game-world .vault-plate::before{
 -webkit-mask:url('../../assets/ui636/title-straight-mask.svg') center/100% 100% no-repeat;
 mask:url('../../assets/ui636/title-straight-mask.svg') center/100% 100% no-repeat;
}
/* Put the unchanged cream art on the same clean outline for the small Vault.
   Underpaint fills only the original picture's transparent perimeter. */
#game-world .vault-plate{position:relative;isolation:isolate;background:none;}
#game-world .vault-plate::before{
 content:"";position:absolute;inset:0;pointer-events:none;z-index:-1;
 background:#dccfac url('../../assets/game/plate_cream_clean.webp') center/100% 100% no-repeat;
}
/* SVG image sources retain each icon's CSS box; preserve its aspect ratio. */
.ui634-icon{object-fit:contain;image-rendering:auto;}