@import"https://use.typekit.net/dqo4qeb.css";html,body{overscroll-behavior:none}body{background-color:#123456;color:#000;font-family:acumin-pro,sans-serif;display:flex;justify-content:center;align-items:center;min-height:100vh;min-height:100svh;margin:0}#panelStage{position:relative;perspective:1000px;display:flex;flex-direction:column;align-items:center;width:100%}body:before{content:"";position:fixed;inset:0;background:url(../numbers.png) no-repeat center center;background-size:cover;opacity:0;transition:opacity 1s ease;z-index:-1}body.bg-loaded:before{opacity:.2}#gameBox,#helpBox{display:block;border:1px solid gray;padding:20px;border-radius:20px}#gameBox{background-color:#fff8dc}#helpBox{display:none;font-size:1.1em;max-width:340px;background-color:#efe}h1{font-size:2.2em;text-align:center;margin-top:0;color:#c03;font-family:Century-Gothic,sans-serif}#block-grid{display:grid;width:fit-content;grid-template-columns:repeat(4,50px);grid-template-rows:repeat(4,50px);grid-gap:11px;align-items:center;justify-items:center;justify-self:center;touch-action:none}#block-grid>div{width:52px;height:52px;background:linear-gradient(135deg,#4a90e2,#3498db,#2980b9);color:#e0ffff;display:flex;align-items:center;justify-content:center;font-size:1.5em;font-weight:700;border-radius:15px;box-shadow:0 2px 4px #0003;-webkit-tap-highlight-color:transparent;touch-action:none;-webkit-user-select:none;user-select:none;-webkit-touch-callout:none;transition:filter .15s ease,box-shadow .15s ease}#block-grid div.empty{background-color:transparent;background:none;box-shadow:none;border:none;cursor:default}#block-grid.celebrating>div{transition:none}@media(hover:hover)and (pointer:fine){#block-grid>div:not(.empty):hover{filter:brightness(1.12);box-shadow:0 4px 10px #0000004d;cursor:pointer}}#block-grid>div:not(.empty):active{filter:brightness(.92)}#gameMessage{font-size:1.2em;font-weight:700;text-align:center;margin-top:35px;color:#333;visibility:hidden}.game-controls{display:flex;flex-direction:row;justify-content:center;margin-top:20px;gap:10px}.game-controls button{padding:10px 16px;font-size:.8em;font-weight:700;border:none;border-radius:20px;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;cursor:pointer;transition:all .3s ease;box-shadow:0 4px 15px #667eea66;position:relative;overflow:hidden;opacity:0}.game-controls button:hover{transform:translateY(-2px);box-shadow:0 8px 25px #667eea99;background:linear-gradient(135deg,#764ba2,#667eea)}.game-controls button:active{transform:scale(1.1);box-shadow:0 2px 10px #667eea66}.game-controls button:disabled{background:linear-gradient(135deg,#ccc,#999);cursor:not-allowed;transform:none;box-shadow:0 2px 8px #0003}#copyright{font-size:.8em;text-align:center;margin-top:20px;color:#333}#extras{margin-top:20px;font-size:.8em}#extras ul{padding:10px 0 0 20px;margin:0}#extras a{color:#00008b;text-decoration:none}#extras a:hover{text-decoration:underline;color:#c03}