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._minimum-note_1iqtz_257{background:var(--cream);color:var(--green-dark);white-space:nowrap;border-radius:999px;padding:5px 9px;font-size:.68rem;font-weight:800}._board-frame_1iqtz_267{background:var(--green-dark);border-radius:16px;padding:6px;box-shadow:0 8px 24px #15372f2e}._board_1iqtz_267{background:#b9c2b6;grid-template-columns:repeat(10,1fr);gap:2px;width:100%;display:grid}._cell_1iqtz_270{aspect-ratio:1;background:var(--paper);cursor:pointer;-webkit-tap-highlight-color:transparent;border:0;border-radius:2px;min-width:0;padding:0;transition:background-color .18s,transform .12s;position:relative}._cell_1iqtz_270._is-dark_1iqtz_251{background:var(--green-dark)}._cell_1iqtz_270:hover{box-shadow:inset 0 0 0 2px var(--coral)}._cell_1iqtz_270:focus-visible{z-index:2;outline:3px solid var(--coral);outline-offset:1px}._cell_1iqtz_270:active,._cell_1iqtz_270._was-tapped_1iqtz_286{transform:scale(.84)}._cell_1iqtz_270._was-tapped_1iqtz_286:after{content:"";border:2px solid 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8px;font-size:.72rem}._tool-button_1iqtz_321:hover:not(:disabled){background:var(--cream)}._tool-button_1iqtz_321:focus-visible,._compare-button_1iqtz_322:focus-visible,._primary-button_1iqtz_323:focus-visible,._howto_1iqtz_79 summary:focus-visible{outline:3px solid var(--coral);outline-offset:2px}._tool-button_1iqtz_321:disabled{cursor:default;opacity:.38}._hint-button_1iqtz_346{border-color:var(--green);background:var(--mint)}._reset-button_1iqtz_351._is-armed_1iqtz_351{border-color:var(--coral);color:#8f3f20;background:#fff0e8}._compare-button_1iqtz_322{width:max-content;min-height:36px;color:var(--muted);text-underline-offset:3px;background:0 0;margin:11px auto -3px;padding:7px 15px;font-size:.68rem;-webkit-text-decoration:underline #aebbb3;text-decoration:underline #aebbb3;display:block}._compare-button_1iqtz_322._is-on_1iqtz_371{color:#9c4523;-webkit-text-decoration-color:var(--coral);text-decoration-color:var(--coral)}._howto_1iqtz_79{background:#fffdf794;border:1px solid #3d5c4e1f;border-radius:18px;width:min(100%,520px);margin:12px auto 0}._howto_1iqtz_79 summary{color:var(--muted);cursor:pointer;text-align:center;padding:12px 16px;font-size:.72rem;font-weight:800}._rule-content_1iqtz_390{align-items:center;gap:16px;padding:0 18px 17px;display:flex}._rule-content_1iqtz_390 p{color:var(--muted);margin-bottom:0;font-size:.72rem;line-height:1.7}._rule-copy_1iqtz_404{gap:7px;display:grid}._rule-copy_1iqtz_404 p+p{color:var(--green);font-weight:700}._rule-example_1iqtz_414{border:2px solid var(--green-dark);background:#bac3b8;border-radius:9px;flex:0 0 84px;grid-template-columns:repeat(3,1fr);gap:2px;padding:4px;display:grid}._rule-cell_1iqtz_425{aspect-ratio:1;background:var(--paper);border-radius:2px;position:relative}._rule-cell_1iqtz_425._flips_1iqtz_432{background:var(--green-dark)}._rule-cell_1iqtz_425._pressed_1iqtz_433:after{content:"";border:2px solid var(--coral);border-radius:50%;position:absolute;inset:25%}._clear-layer_1iqtz_441{z-index:10;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);background:#15372f75;place-items:center;padding:22px;display:grid;position:fixed;inset:0;overflow:hidden}._clear-card_1iqtz_446{z-index:2;background:var(--paper);text-align:center;border-radius:28px;width:min(100%,350px);padding:30px 26px 23px;animation:.36s cubic-bezier(.22,1,.36,1) both _card-in_1iqtz_1;position:relative;box-shadow:0 28px 80px #0d241e47}._clear-card_1iqtz_446._is-optimal_1iqtz_452{border:2px solid color-mix(in srgb, var(--gold) 62%, white);background:radial-gradient(circle at 50% 0%, #f8e7b3b8, transparent 42%), var(--paper);box-shadow:0 30px 90px #573b0d59,0 0 0 7px #f8e7b32e}._clear-mark_1iqtz_460{background:var(--mint);width:66px;height:66px;color:var(--green-dark);border-radius:50%;place-items:center;margin:0 auto 15px;font-size:2rem;font-weight:900;display:grid}._clear-mark_1iqtz_460._is-medal_1iqtz_465{color:#fff9e6;text-shadow:0 2px 2px #643e0959;background:radial-gradient(circle at 35% 28%,#ffe9a8 0 12%,#d5a13f 48%,#9d6919 100%);animation:.58s cubic-bezier(.22,1.35,.36,1) .12s both _medal-pop_1iqtz_1;position:relative;box-shadow:inset 0 0 0 5px #fff8de70,0 9px 24px #7e521245}._clear-card_1iqtz_446 h2{margin-bottom:15px;font-size:1.35rem}._clear-difficulty_1iqtz_476{color:var(--difficulty-accent);margin-bottom:5px;font-size:.72rem;font-weight:900}._optimal-reward_1iqtz_483{border:1px solid color-mix(in srgb, var(--gold) 36%, white);background:color-mix(in srgb, var(--gold-soft) 58%, white);color:var(--gold-deep);text-align:left;border-radius:16px;align-items:center;gap:11px;margin:-3px 0 15px;padding:11px 13px;display:flex}._reward-medal_1iqtz_496{color:#fff8df;background:linear-gradient(145deg,#e2b75a,#a56e1a);border-radius:50%;flex:0 0 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strong{color:var(--ink);margin-left:4px;font-family:Georgia,serif;font-size:1.12rem}._primary-button_1iqtz_323{background:var(--green-dark);color:#fff;justify-content:center;align-items:center;gap:12px;width:100%;padding:14px 22px;display:flex;box-shadow:0 8px 20px #15372f33}._primary-button_1iqtz_323:hover{background:var(--green)}._clear-actions_1iqtz_551{grid-template-columns:repeat(2,1fr);gap:8px;margin-top:9px;display:grid}._clear-actions_1iqtz_551 button{min-height:38px;color:var(--muted);cursor:pointer;background:0 0;border:0;border-radius:999px;font-size:.68rem;font-weight:800}._clear-actions_1iqtz_551 button:hover{background:var(--cream);color:var(--ink)}._clear-actions_1iqtz_551 button:focus-visible{outline:3px solid 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span:nth-child(3){background:#f0cc66;animation-delay:.2s;left:29%}._confetti_1iqtz_721 span:nth-child(4){animation-delay:1s;left:40%}._confetti_1iqtz_721 span:nth-child(5){background:var(--mint);animation-delay:.4s;left:51%}._confetti_1iqtz_721 span:nth-child(6){background:#f0cc66;animation-delay:1.2s;left:62%}._confetti_1iqtz_721 span:nth-child(7){animation-delay:.1s;left:71%}._confetti_1iqtz_721 span:nth-child(8){background:var(--mint);animation-delay:.8s;left:80%}._confetti_1iqtz_721 span:nth-child(9){background:#f0cc66;animation-delay:.3s;left:89%}._confetti_1iqtz_721 span:nth-child(10){animation-delay:1.4s;left:96%}._confetti_1iqtz_721._is-optimal_1iqtz_452 span{background:#e0ad46}._confetti_1iqtz_721._is-optimal_1iqtz_452 span:nth-child(2n){background:#fff0b7}._confetti_1iqtz_721._is-optimal_1iqtz_452 span:nth-child(3n){background:var(--mint)}._confetti_1iqtz_721._is-optimal_1iqtz_452 span:nth-child(11){animation-delay:1.1s;left:13%}._confetti_1iqtz_721._is-optimal_1iqtz_452 span:nth-child(12){animation-delay:1.5s;left:24%}._confetti_1iqtz_721._is-optimal_1iqtz_452 span:nth-child(13){animation-delay:.75s;left:35%}._confetti_1iqtz_721._is-optimal_1iqtz_452 span:nth-child(14){animation-delay:1.65s;left:57%}._confetti_1iqtz_721._is-optimal_1iqtz_452 span:nth-child(15){animation-delay:1.25s;left:76%}._confetti_1iqtz_721._is-optimal_1iqtz_452 span:nth-child(16){animation-delay:.95s;left:92%}@keyframes _card-in_1iqtz_1{0%{opacity:0;transform:translateY(18px)scale(.96)}to{opacity:1;transform:translateY(0)scale(1)}}@keyframes _medal-pop_1iqtz_1{0%{opacity:0;transform:scale(.45)rotate(-18deg)}to{opacity:1;transform:scale(1)rotate(0)}}@keyframes _hint-pulse_1iqtz_1{0%,to{box-shadow:inset 0 0 0 4px var(--coral), 0 0 0 2px #ef83542e}50%{box-shadow:inset 0 0 0 4px var(--coral), 0 0 0 5px #ef835461}}@keyframes _confetti-fall_1iqtz_1{0%{opacity:1;transform:translateY(-3vh)rotate(0)}to{opacity:.72;transform:translateY(108vh)rotate(540deg)}}@keyframes _sheet-up_1iqtz_1{0%{opacity:0;transform:translateY(28px)}to{opacity:1;transform:translateY(0)}}@media (width<=420px){._game-shell_1iqtz_52{padding:18px 12px 16px}._topbar_1iqtz_79{margin-bottom:9px;padding:0 5px}._stage-badge_1iqtz_108{width:58px;height:58px}._difficulty-switch_1iqtz_79{border-radius:16px;min-height:50px;margin-bottom:9px}._play-card_1iqtz_79{border-radius:23px;padding:16px 14px}._goal-grid_1iqtz_239{width:66px}._board-frame_1iqtz_267{border-radius:13px;padding:5px}._board_1iqtz_267{gap:1px}._coach-note_1iqtz_301,._howto_1iqtz_79{margin-top:9px}._difficulty-layer_1iqtz_579{align-items:end;padding:0}._difficulty-card_1iqtz_591{width:100%;max-height:92svh;padding:21px 16px max(20px, env(safe-area-inset-bottom));border-radius:28px 28px 0 0;animation-name:_sheet-up_1iqtz_1}._difficulty-option_1iqtz_639{min-height:74px;padding-inline:10px}}@media 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span{align-items:center;gap:7px;display:inline-flex}._hero-points_1a4ug_77 b{background:var(--indigo-light);width:21px;height:21px;color:var(--indigo);border-radius:50%;place-items:center;display:grid}._hero-button_1a4ug_80,._primary-button_1a4ug_80{background:var(--indigo);color:#fff;cursor:pointer;border:0;border-radius:999px;justify-content:center;align-items:center;min-height:54px;font-weight:750;text-decoration:none;display:inline-flex;box-shadow:0 12px 30px #414c8533}._hero-button_1a4ug_80{margin-top:32px;padding:0 28px}._site-page_1a4ug_1 ._hero-button_1a4ug_80{color:#fff}._hero-button_1a4ug_80:hover,._primary-button_1a4ug_80:hover{background:var(--indigo-dark)}._hero-board_1a4ug_85{aspect-ratio:1;width:min(100%,420px);box-shadow:var(--shadow);background:#ffffffe0;border:1px solid #d8d9e6;border-radius:28px;grid-template-columns:repeat(9,1fr);padding:18px;display:grid;position:relative;transform:rotate(2deg)}._hero-board-label_1a4ug_86{background:var(--indigo);color:#fff;letter-spacing:.08em;border-radius:999px;padding:8px 17px;font-size:.76rem;font-weight:750;position:absolute;top:-17px;right:25px}._hero-board_1a4ug_85>span{color:var(--indigo);border-bottom:1px solid #b1b6c6;border-right:1px solid #b1b6c6;place-items:center;font:700 clamp(.9rem,2vw,1.25rem)/1 Arial,sans-serif;display:grid}._hero-board_1a4ug_85>span:nth-of-type(3n):not(:nth-of-type(9n)){border-right:2px solid var(--line-strong)}._hero-board_1a4ug_85>span:nth-of-type(9n){border-right:0}._hero-board_1a4ug_85>span:nth-of-type(n+19):nth-of-type(-n+27),._hero-board_1a4ug_85>span:nth-of-type(n+46):nth-of-type(-n+54){border-bottom:2px solid var(--line-strong)}._hero-board_1a4ug_85>span:nth-of-type(n+73){border-bottom:0}._play-section_1a4ug_93{background:#fff;padding:90px 16px 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#e0e1e8;grid-template-columns:1fr 1fr;gap:22px 30px;padding:30px 38px;display:grid}._choice-label_1a4ug_103{color:var(--muted);margin:0 0 9px;font-size:.82rem;font-weight:750}._segmented-control_1a4ug_104{grid-template-columns:1fr 1fr;gap:7px;display:grid}._segmented-control_1a4ug_104 button{min-height:50px;color:var(--muted);cursor:pointer;background:#fff;border:1px solid #b9bdce;border-radius:12px;padding:7px 10px;font-size:.83rem;font-weight:700;line-height:1.35}._segmented-control_1a4ug_104 button._is-active_1a4ug_106{border-color:var(--indigo);background:var(--indigo);color:#fff;box-shadow:0 6px 16px #414c8529}._segmented-control_1a4ug_104 button:disabled{color:#777d89;cursor:not-allowed;background:#eeeef2;border-color:#d6d8e0}._choice-help_1a4ug_108{min-height:2.8em;color:var(--muted);margin:8px 0 0;font-size:.76rem;line-height:1.4}._puzzle-session_1a4ug_110{padding:34px 38px 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h1{font-size:clamp(2.15rem,11.3vw,3.1rem);line-height:1.38}._play-section_1a4ug_93{padding:75px 10px 90px}._centered-heading_1a4ug_96{padding:0 10px}._game-panel_1a4ug_97{border-radius:20px}._game-choices_1a4ug_102{grid-template-columns:1fr;gap:18px;padding:24px 16px 19px}._puzzle-session_1a4ug_110{padding:25px 10px 24px}._sudoku-cell_1a4ug_122{font-size:clamp(1.28rem,7.4vw,2rem)}._number-pad_1a4ug_147{grid-template-columns:repeat(10,minmax(0,1fr))}._number-key_1a4ug_148:nth-child(-n+5){grid-area:1/span 2}._number-key_1a4ug_148:nth-child(6){grid-area:2/2/auto/span 2}._number-key_1a4ug_148:nth-child(7){grid-area:2/4/auto/span 2}._number-key_1a4ug_148:nth-child(8){grid-area:2/6/auto/span 2}._number-key_1a4ug_148:nth-child(9){grid-area:2/8/auto/span 2}._number-key_1a4ug_148{min-height:54px}._completion-card_1a4ug_156 ._primary-button_1a4ug_80{grid-column:1/-1;width:100%}._guide-section_1a4ug_160,._levels-section_1a4ug_169{padding:85px 18px}._levels-section_1a4ug_169 h2{font-size:clamp(1.1rem,8vw - 5.5px,1.75rem)}._level-cards_1a4ug_172{grid-template-columns:1fr}._level-cards_1a4ug_172 article{min-height:0;padding:28px}._about-section_1a4ug_183{grid-template-columns:1fr;width:calc(100% - 36px);padding:85px 0}._about-section_1a4ug_183 ._number-mark_1a4ug_50{width:60px;height:60px}._privacy-note_1a4ug_189{width:calc(100% - 36px);margin-bottom:70px;padding:23px}._site-footer_1a4ug_192{flex-direction:column;align-items:flex-start;padding:38px 18px}}@media (width<=360px){._site-header_1a4ug_37 nav a:first-child{display:none}._hero-section_1a4ug_70{padding-left:12px;padding-right:12px}._hero-copy_1a4ug_74 h1{font-size:2.05rem}._game-choices_1a4ug_102{padding-left:10px;padding-right:10px}._puzzle-session_1a4ug_110{padding-left:7px;padding-right:7px}._difficulty-badge_1a4ug_115{padding:6px 10px;font-size:.7rem}._assist-actions_1a4ug_151{grid-template-columns:1fr}._number-key_1a4ug_148{min-height:50px}}@media 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