*{box-sizing:border-box;margin:0;padding:0}html,body{min-height:100%;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased;overscroll-behavior:none;touch-action:manipulation}#app{min-height:100%;display:flex;align-items:center;justify-content:center;padding:16px}.game{width:min(92vw,420px);display:flex;flex-direction:column;gap:14px}.crumb{font-size:14px}.crumb a{color:var(--accent);text-decoration:none;font-weight:700}.crumb a:hover{text-decoration:underline}.topbar{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between}.title{font-size:clamp(30px,9vw,46px);font-weight:800;line-height:1;letter-spacing:-1px;background:linear-gradient(135deg,#f2b616,#ef6f43 48%,#b3279a);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent}.sizebar{display:flex;gap:6px;background:linear-gradient(160deg,color-mix(in srgb,var(--surface) 88%,#000 12%),var(--surface));border:1px solid var(--line);border-radius:10px;padding:4px;box-shadow:inset 0 2px 5px #00000024,inset 0 -1px #ffffff24}.size{flex:1;border:none;background:transparent;color:var(--text);font-size:14px;font-weight:700;padding:8px 4px;border-radius:7px;cursor:pointer;transition:background .14s ease,color .14s ease,box-shadow .14s ease,transform 80ms ease}.size:hover{background:color-mix(in srgb,var(--line) 70%,transparent)}.size:active{transform:translateY(1px)}.size.active{background:linear-gradient(160deg,color-mix(in srgb,var(--accent) 84%,#fff 16%),var(--accent));color:var(--accent-text);box-shadow:inset 0 1px #ffffff59,0 2px 6px #00000038}.stats{display:flex;gap:8px}.stat{flex:1;background:linear-gradient(160deg,color-mix(in srgb,var(--board-bg) 82%,#fff 18%),var(--board-bg));color:var(--accent-text);border-radius:10px;padding:6px 10px;text-align:center;min-width:0;box-shadow:inset 0 1px #ffffff40,0 3px 8px #00000024}.stat .label{font-size:10px;text-transform:uppercase;letter-spacing:1px;opacity:.85;font-weight:700}.stat .value{font-size:20px;font-weight:800;line-height:1.1;white-space:nowrap}.controls{display:flex;align-items:center;justify-content:space-between;gap:10px}.how{font-size:13px;opacity:.85;flex:1}.how b{font-weight:700}.btn{background:linear-gradient(160deg,color-mix(in srgb,var(--accent) 85%,#fff 15%),var(--accent));color:var(--accent-text);border:none;border-radius:10px;padding:10px 16px;font-size:14px;font-weight:700;cursor:pointer;white-space:nowrap;box-shadow:inset 0 1px #ffffff4d,0 3px 7px #0000002e;transition:filter .12s ease,transform 80ms ease}.btn:hover{filter:brightness(1.06)}.btn:active{filter:brightness(.95);transform:translateY(1px)}.board{--n: 4;--gap: clamp(6px, 2vw, 10px);--board: min(92vw, calc(100dvh - 260px) , 440px);--cell: calc((var(--board) - (var(--n) + 1) * var(--gap)) / var(--n));--radius: clamp(6px, 1.6vw, 10px);position:relative;width:var(--board);height:var(--board);min-width:264px;min-height:264px;align-self:center;background:linear-gradient(115deg,#ffffff1a,#fff0 40%),repeating-linear-gradient(112deg,#0000000d 0px 1px,#ffffff08 2px 5px),radial-gradient(120% 120% at 30% 12%,color-mix(in srgb,var(--board-bg) 80%,#fff 20%) 0%,var(--board-bg) 55%,color-mix(in srgb,var(--board-bg) 82%,#000 18%) 100%);border-radius:14px;padding:var(--gap);touch-action:none;box-shadow:inset 0 1px #ffffff40,inset 0 -2px 6px #0000002e,0 18px 40px #00000047,0 4px 10px #0000002e}.tiles{position:absolute;inset:var(--gap);border-radius:10px;box-shadow:inset 0 3px 8px #00000047,inset 0 -1px #ffffff14}.tile{position:absolute;width:var(--cell);height:var(--cell);border:none;border-radius:var(--radius);display:flex;align-items:center;justify-content:center;background:linear-gradient(150deg,#ffd98a,#f5b34c 46%,#e2882b);color:#5a3a0f;font-weight:800;font-size:calc(var(--cell) * .44);line-height:1;cursor:pointer;-webkit-tap-highlight-color:transparent;text-shadow:0 1px 0 rgba(255,255,255,.45);box-shadow:inset 0 2px #ffffff8c,inset 0 -5px 10px #7837003d,0 5px 11px #00000047,0 1px 2px #0003;--tx: calc(var(--col) * (var(--cell) + var(--gap)));--ty: calc(var(--row) * (var(--cell) + var(--gap)));transform:translate(var(--tx),var(--ty));transition:transform 165ms cubic-bezier(.34,1.32,.52,1),filter .12s ease;will-change:transform}.tile:before{content:"";position:absolute;inset:0;border-radius:inherit;background:linear-gradient(180deg,#fff6,#fff0 46%);pointer-events:none}.tile:hover{filter:brightness(1.06)}.tile:active{filter:brightness(.94)}.board:has(.overlay.win.show) .tile{animation:solveShimmer 1.6s ease-in-out}@keyframes solveShimmer{0%,to{filter:brightness(1);box-shadow:inset 0 2px #ffffff8c,inset 0 -5px 10px #7837003d,0 5px 11px #00000047,0 0 #ffd27800}45%{filter:brightness(1.16);box-shadow:inset 0 2px #fff9,inset 0 -5px 10px #78370033,0 5px 11px #00000047,0 0 22px #ffcd6ed9}}.overlay{position:absolute;inset:0;border-radius:14px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;text-align:center;padding:20px;background:var(--overlay-bg);backdrop-filter:blur(2px);z-index:10;opacity:0;pointer-events:none;transition:opacity .22s ease}.overlay.show{opacity:1;pointer-events:auto}.overlay.show .msg{animation:solvedPop .38s ease}@keyframes solvedPop{0%{transform:scale(.6);opacity:0}60%{transform:scale(1.08);opacity:1}to{transform:scale(1);opacity:1}}.overlay .msg{font-size:clamp(28px,9vw,44px);font-weight:800}.overlay.win .msg{background:linear-gradient(135deg,#ffe27a,#f2b616);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent}.overlay .sub{font-size:15px;font-weight:700;opacity:.9}.overlay .actions{display:flex;gap:10px;margin-top:4px}@media(prefers-reduced-motion:reduce){.tile{transition:transform .12s ease,filter .12s ease}.board:has(.overlay.win.show) .tile{animation:none}}