:root{--bg: #0e1116;--panel: #171c26;--panel-2: #212940;--text: #e8ecf4;--muted: #93a0b4;--accent: #34d399;--accent-ink: #04241a;color-scheme:dark}*{box-sizing:border-box}html,body,#app{height:100%}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;-webkit-tap-highlight-color:transparent;overflow:hidden}.game{height:100%;max-width:620px;margin-inline:auto;padding:max(12px,env(safe-area-inset-top)) max(12px,env(safe-area-inset-right)) max(12px,env(safe-area-inset-bottom)) max(12px,env(safe-area-inset-left));display:flex;flex-direction:column;gap:12px;-webkit-touch-callout:none;-webkit-user-select:none;user-select:none}.hud{display:flex;align-items:center;justify-content:space-between;gap:8px;flex-wrap:wrap}.chips,.actions{display:flex;align-items:center;gap:8px}.actions{flex:none}.chips{min-width:0;overflow:hidden}.chip{display:flex;align-items:center;gap:6px;min-height:40px;padding:8px 12px;border-radius:10px;background:var(--panel);font-size:14px;white-space:nowrap}.chip[hidden]{display:none}.chip-label{color:var(--muted);font-size:12px;letter-spacing:.04em;text-transform:uppercase}.chip-value{font-weight:700;font-variant-numeric:tabular-nums;direction:ltr;unicode-bidi:isolate}.icon{width:18px;height:18px;flex:none;color:var(--muted)}#best-chip .icon{color:var(--accent)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;min-width:44px;padding:0 14px;border:0;border-radius:10px;background:var(--panel-2);color:var(--text);font:inherit;font-weight:600;cursor:pointer}.btn:active{transform:translateY(1px)}.btn-icon .icon{color:inherit}.btn-primary{background:var(--accent);color:var(--accent-ink);padding:0 26px;font-size:16px}.sizes{display:flex;gap:4px;padding:4px;border-radius:12px;background:var(--panel)}.size-btn{min-height:36px;min-width:46px;padding:0 8px;border:0;border-radius:8px;background:transparent;color:var(--muted);font:inherit;font-size:14px;font-weight:700;font-variant-numeric:tabular-nums;cursor:pointer}.size-btn.is-active{background:var(--panel-2);color:var(--text);box-shadow:inset 0 0 0 1px #34d39959}.board-wrap{flex:1;min-height:0;min-width:0;display:flex;align-items:center;justify-content:center;touch-action:none}.board{--gap: calc(var(--board) * .022);--cell: calc((var(--board) - (var(--n) + 1) * var(--gap)) / var(--n));--step: calc(var(--cell) + var(--gap));position:relative;width:var(--board, 300px);height:var(--board, 300px);border-radius:calc(var(--board) * .028);background:var(--panel);box-shadow:0 0 0 1px #ffffff0d;transition:box-shadow .26s ease-out}.board.is-solved{box-shadow:0 0 0 1px #34d3998c,0 0 calc(var(--board) * .06) #34d39947}.slots{position:absolute;inset:0;display:grid;grid-template-columns:repeat(var(--n),1fr);grid-template-rows:repeat(var(--n),1fr);gap:var(--gap);padding:var(--gap)}.slot{border-radius:calc(var(--cell) * .13);background:#ffffff0a}.tiles{position:absolute;inset:0}.tile{position:absolute;inset-block-start:var(--gap);inset-inline-start:var(--gap);width:var(--cell);height:var(--cell);display:flex;align-items:center;justify-content:center;border-radius:calc(var(--cell) * .13);background:linear-gradient(180deg,#3a466e,#2b3450);color:#e9eefb;box-shadow:inset 0 1px #ffffff24,0 calc(var(--cell) * .02) calc(var(--cell) * .06) #00000059;font-weight:800;font-variant-numeric:tabular-nums;line-height:1;transform:translate(calc(var(--x) * var(--step)),calc(var(--y) * var(--step)));transition:transform .11s ease-in-out,background-color .2s ease-out;will-change:transform}.tile.is-home{background:linear-gradient(180deg,#2f6d5c,#22523f);color:#eafff6}.board.is-solved .tile{background:linear-gradient(180deg,#35866f,#276048)}.tile-value{font-size:calc(var(--cell) * .44)}.tile[data-len="2"] .tile-value{font-size:calc(var(--cell) * .38)}.overlay{position:absolute;inset:0;z-index:3;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:16px;text-align:center;border-radius:calc(var(--board) * .028);background:#0e1116cc;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);animation:overlay-in .22s ease-out}.overlay[hidden]{display:none}@keyframes overlay-in{0%{opacity:0}to{opacity:1}}.overlay-title{margin:0;font-size:clamp(22px,5vw,38px);font-weight:800}.overlay-score{margin:0;font-size:16px;font-weight:600;color:var(--muted)}.overlay-best{margin:0;font-size:15px;font-weight:700;color:var(--accent)}.overlay-best[hidden]{display:none}.hint{margin:0;margin-inline-end:56px;text-align:center;color:var(--muted);font-size:13px;line-height:1.45}@media(min-width:620px){.hint{margin-inline-end:150px}}@media(max-width:400px){.chip-label{display:none}.chip{padding:8px 10px}.btn-icon .btn-text{display:none}.btn-icon{padding:0 12px}}@media(max-height:430px){.game{padding:max(8px,env(safe-area-inset-top)) max(8px,env(safe-area-inset-right)) max(8px,env(safe-area-inset-bottom)) max(8px,env(safe-area-inset-left));gap:8px}.chip{min-height:34px;padding:6px 9px;gap:4px}.btn{min-height:38px}.size-btn{min-height:30px;min-width:40px}.hint{display:none}}@media(max-width:380px)and (max-height:430px){.sizes{display:none}.hud{flex-wrap:nowrap}#best-chip{display:none}.board-wrap{padding-block-end:48px}}@media(max-height:430px)and (min-aspect-ratio:13 / 10){.game{flex-direction:row;align-items:stretch;max-width:none}.hud{flex-direction:column;flex-wrap:nowrap;justify-content:center;align-items:stretch;flex:0 0 auto}.chips,.actions{flex-direction:column;align-items:stretch}.chip{justify-content:space-between}.sizes{display:flex}.size-btn{flex:1}}@media(prefers-reduced-motion:reduce){.tile,.board,.overlay{transition-duration:1ms;animation-duration:1ms}}