body,html{margin:0;padding:0;height:100%;overflow:hidden;background:url('../assets/background.jpg') center center/cover no-repeat #1a1a1a;font-family:Arial,sans-serif}#gameCanvas{display:block;cursor:none;background:0 0;position:fixed;top:0;left:0;width:100vw;height:100vh;image-rendering:-webkit-optimize-contrast;image-rendering:crisp-edges;image-rendering:pixelated;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;z-index:1}#gameCanvas.show-cursor{cursor:default}.canvas-border{position:fixed;background:linear-gradient(135deg,rgba(78,205,196,.6) 0,rgba(255,215,0,.4) 50%,rgba(78,205,196,.6) 100%);box-shadow:0 0 10px rgba(78,205,196,.3),inset 0 0 5px rgba(255,215,0,.2);z-index:2;pointer-events:none;backdrop-filter:blur(3px)}.canvas-border.top{top:calc(var(--letterbox-top,0px) - 5px);left:calc(var(--letterbox-left,0px) - 5px);width:calc(var(--letterbox-width,100vw) + 10px);height:5px;border-radius:6px 6px 0 0}.canvas-border.bottom{top:calc(var(--letterbox-top,0px) + var(--letterbox-height,100vh));left:calc(var(--letterbox-left,0px) - 5px);width:calc(var(--letterbox-width,100vw) + 10px);height:5px;border-radius:0 0 6px 6px}.canvas-border.left{top:calc(var(--letterbox-top,0px) - 5px);left:calc(var(--letterbox-left,0px) - 5px);width:5px;height:calc(var(--letterbox-height,100vh) + 10px);border-radius:6px 0 0 6px}.canvas-border.right{top:calc(var(--letterbox-top,0px) - 5px);left:calc(var(--letterbox-left,0px) + var(--letterbox-width,100vw));width:5px;height:calc(var(--letterbox-height,100vh) + 10px);border-radius:0 6px 6px 0}@media (max-width:1024px){.canvas-border{display:var(--show-borders,block)}}.hidden{display:none!important}button:focus,input:focus{outline:#4ECDC4 solid 3px;outline-offset:2px}.sponsor-link-class{position:fixed;bottom:15px;right:15px;font-size:12px;color:#f1f1f1}.sponsor-link-class a{color:#4ecdc4;text-decoration:none;transition:color .3s}.sponsor-link-class a:hover{color:gold;text-decoration:underline}