.scene-tools{display:flex;align-items:center;justify-content:flex-end;gap:8px;flex-wrap:wrap}
.fullscreen-toggle{min-height:42px;padding:7px 12px;border:2px solid #e3d4ed;border-radius:13px;background:#fff;color:#43215f;font-size:13px;font-weight:900;white-space:nowrap}
.fullscreen-toggle span{font-size:18px;vertical-align:-1px;margin-right:4px}
.fullscreen-toggle[aria-pressed=true]{background:#eee0f8;border-color:#7040ab}
body.puzzle-is-fullscreen{overflow:hidden}
.puzzle-stage.is-fullscreen{position:fixed;z-index:10000;inset:0;width:100%;height:100vh;height:100dvh;max-width:none;min-height:0;margin:0;border:0;border-radius:0;overflow:hidden;overscroll-behavior:contain;padding:max(8px,env(safe-area-inset-top)) max(12px,env(safe-area-inset-right)) max(8px,env(safe-area-inset-bottom)) max(12px,env(safe-area-inset-left));display:flex;flex-direction:column;gap:6px}
.puzzle-stage.is-fullscreen .scene-heading{flex:none;margin:0;align-items:center}
.puzzle-stage.is-fullscreen .scene-heading h2{font-size:clamp(20px,3vh,30px)}
.puzzle-stage.is-fullscreen .scene-tools{flex-wrap:nowrap}
.puzzle-stage.is-fullscreen .level-bar{flex:none;margin:0;gap:12px}
.puzzle-stage.is-fullscreen .level-buttons{gap:5px}
.puzzle-stage.is-fullscreen .level-buttons button{min-height:38px;padding:3px 9px}
.puzzle-stage.is-fullscreen .game-layout{flex:1 1 auto;min-height:0;align-items:stretch;grid-template-columns:minmax(0,1fr) minmax(160px,min(20vw,260px));grid-template-rows:minmax(0,1fr);gap:clamp(8px,1.2vw,18px);overflow:hidden}
.puzzle-stage.is-fullscreen .board-column{min-width:0;min-height:0;display:grid;grid-template-rows:minmax(0,1fr) auto;justify-items:center;align-items:center}
.puzzle-stage.is-fullscreen .board-wrap{width:auto;height:100%;max-width:100%;max-height:none;aspect-ratio:var(--scene-ratio,1.5);margin:0 auto}
.puzzle-stage.is-fullscreen .status{min-height:0;padding:3px 4px 0;font-size:12px;line-height:1.2}
.puzzle-stage.is-fullscreen .helper{min-width:0;min-height:0;display:grid;grid-template-columns:minmax(76px,96px) minmax(0,1fr);gap:6px 10px;align-content:center;overflow:auto}
.puzzle-stage.is-fullscreen .helper figure{grid-row:1/4;align-self:center}
.puzzle-stage.is-fullscreen .helper figure img{aspect-ratio:var(--scene-ratio,1.5);object-fit:cover}
.puzzle-stage.is-fullscreen .how-to{margin:0;font-size:13px}
.puzzle-stage.is-fullscreen .game-actions{grid-column:1/-1;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px;margin-top:0}
.puzzle-stage.is-fullscreen .game-actions .text-button{grid-column:1/-1}
.puzzle-stage.is-fullscreen .reset-prompt{grid-column:1/-1}

@media(max-width:700px) and (orientation:portrait){
  .puzzle-stage.is-fullscreen{gap:6px;padding-left:max(8px,env(safe-area-inset-left));padding-right:max(8px,env(safe-area-inset-right))}
  .puzzle-stage.is-fullscreen .scene-heading{gap:6px}
  .puzzle-stage.is-fullscreen .scene-heading h2{font-size:20px}
  .puzzle-stage.is-fullscreen .scene-heading .eyebrow{font-size:8px;margin-bottom:2px}
  .puzzle-stage.is-fullscreen .collection-count{font-size:9px;padding:5px 7px}
  .puzzle-stage.is-fullscreen .fullscreen-toggle{min-height:36px;padding:5px 8px;font-size:11px}
  .puzzle-stage.is-fullscreen .level-bar{display:block;font-size:12px}
  .puzzle-stage.is-fullscreen .level-bar>span{display:block;margin-bottom:5px}
  .puzzle-stage.is-fullscreen .level-buttons{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:4px}
  .puzzle-stage.is-fullscreen .level-buttons button{min-width:0;min-height:36px;padding:3px 1px;font-size:16px}
  .puzzle-stage.is-fullscreen .level-buttons button span{display:none}
  .puzzle-stage.is-fullscreen .game-layout{grid-template-columns:minmax(0,1fr);grid-template-rows:minmax(0,1fr) auto;gap:6px;overflow:auto}
  .puzzle-stage.is-fullscreen .board-wrap{width:min(100%,96vw,64dvh);height:auto;max-height:100%;aspect-ratio:var(--scene-ratio,1.5)}
  .puzzle-stage.is-fullscreen .helper{grid-template-columns:82px minmax(0,1fr);gap:5px 9px}
  .puzzle-stage.is-fullscreen .helper figure{grid-row:1/3;padding:4px 4px 6px}
  .puzzle-stage.is-fullscreen .helper figcaption{font-size:9px}
  .puzzle-stage.is-fullscreen .how-to{font-size:12px}
  .puzzle-stage.is-fullscreen .progress-label{font-size:10px}
  .puzzle-stage.is-fullscreen .progress-label strong{font-size:15px}
  .puzzle-stage.is-fullscreen .game-actions{gap:5px}
  .puzzle-stage.is-fullscreen .game-actions button{min-height:38px;padding:5px;font-size:11px}
}

@media(max-width:850px) and (orientation:landscape){
  .puzzle-stage.is-fullscreen{gap:5px;padding-top:max(6px,env(safe-area-inset-top));padding-bottom:max(6px,env(safe-area-inset-bottom))}
  .puzzle-stage.is-fullscreen .scene-heading h2{font-size:20px}
  .puzzle-stage.is-fullscreen .scene-heading .eyebrow{font-size:8px;margin-bottom:2px}
  .puzzle-stage.is-fullscreen .collection-count{font-size:10px;padding:5px 8px}
  .puzzle-stage.is-fullscreen .fullscreen-toggle{min-height:34px;padding:3px 8px;font-size:11px}
  .puzzle-stage.is-fullscreen .level-bar{font-size:12px;gap:7px}
  .puzzle-stage.is-fullscreen .level-buttons{flex-wrap:nowrap;gap:4px}
  .puzzle-stage.is-fullscreen .level-buttons button{min-height:34px;padding:2px 6px;font-size:16px}
  .puzzle-stage.is-fullscreen .level-buttons button span{font-size:9px}
  .puzzle-stage.is-fullscreen .game-layout{grid-template-columns:minmax(0,1fr) minmax(145px,21vw)}
  .puzzle-stage.is-fullscreen .helper{grid-template-columns:minmax(68px,86px) minmax(0,1fr);gap:5px 8px;max-height:100%}
  .puzzle-stage.is-fullscreen .helper figure{grid-row:1/4;padding:4px}
  .puzzle-stage.is-fullscreen .helper figcaption{font-size:9px}
  .puzzle-stage.is-fullscreen .how-to{font-size:11px}
  .puzzle-stage.is-fullscreen .progress-label{font-size:9px;gap:4px}
  .puzzle-stage.is-fullscreen .progress-label strong{font-size:14px}
  .puzzle-stage.is-fullscreen .game-actions{gap:4px}
  .puzzle-stage.is-fullscreen .game-actions button{min-height:32px;padding:3px;font-size:10px}
}

@media(prefers-reduced-motion:reduce){.fullscreen-toggle{transition:none!important}}