@import "https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Noto+Sans+SC:wght@400;500;600;700;800&display=swap";:root{color:#24252b;font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;--ink:#24252b;--muted:#898b96;--purple:#6b58e8;--purple-dark:#5542d0;--line:#ececf2;background:#f6f7fb;font-family:DM Sans,Noto Sans SC,sans-serif}*{box-sizing:border-box}body{background:radial-gradient(at 50% 20%,#e9e6ff70,#0000 34rem),#f6f7fb;min-width:320px;margin:0}button,a{font:inherit}button{color:inherit}.site-header,main,.site-footer{width:min(100% - 48px,1024px);margin-inline:auto}.site-header{border-bottom:1px solid #e2e3ecbf;justify-content:space-between;align-items:center;height:82px;display:flex}.brand{color:var(--ink);letter-spacing:-.7px;align-items:center;gap:10px;font-size:19px;font-weight:800;text-decoration:none;display:inline-flex}.brand-mark{color:#fff;background:var(--purple);border-radius:11px;place-items:center;width:32px;height:32px;font-size:17px;display:grid;box-shadow:0 5px 12px #6b58e833}.brand-dot{color:var(--purple)}.header-note{color:#7d7e88;align-items:center;gap:8px;font-size:12px;display:inline-flex}.live-dot{background:#65c69b;border-radius:50%;width:7px;height:7px;box-shadow:0 0 0 3px #65c69b21}main{padding-top:57px}.intro{text-align:center;margin:0 auto 30px}.eyebrow{color:#8a7de8;letter-spacing:1.4px;font-size:11px;font-weight:700}.intro .eyebrow{letter-spacing:.8px;align-items:center;gap:7px;display:inline-flex}.intro .eyebrow span{font-size:15px}h1{letter-spacing:-3.2px;margin:8px 0 2px;font-size:clamp(42px,7vw,58px);line-height:1.15}.intro p{color:#858692;margin:9px 0 0;font-size:14px}.game-shell{background:#fff;border:1px solid #e6e6efd9;border-radius:19px;width:min(100%,590px);margin-inline:auto;padding:22px 26px 17px;box-shadow:0 14px 42px #2b2a4b12,0 2px 6px #2b2a4b06}.game-tabs{background:#eeedf5;border:1px solid #e8e7ef;border-radius:12px;gap:5px;width:min(100%,590px);margin:0 auto 13px;padding:5px;display:flex}.game-tab{color:#777583;white-space:nowrap;cursor:pointer;background:0 0;border:0;border-radius:8px;flex:1;justify-content:center;align-items:center;gap:7px;min-width:0;padding:10px 12px;font-size:12px;font-weight:600;transition:background .13s,box-shadow .13s,color .13s;display:flex}.game-tab>span{color:#9287dc;font-size:14px;font-weight:700}.game-tab.is-active{color:#403a64;background:#fff;box-shadow:0 2px 7px #2b2a4b14}.game-tab:focus-visible,.memory-card:focus-visible,.sudoku-cell:focus-visible,.sudoku-tool:focus-visible,.sudoku-numbers button:focus-visible{outline-offset:2px;outline:3px solid #6b58e859}.game-panel[hidden]{display:none}.memory-stats{color:#92909e;gap:12px;font-size:11px;display:flex}.memory-stats strong,.sudoku-mistakes strong{color:#6254c7;font-weight:700}.memory-board{grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;width:min(100%,430px);margin:22px auto 16px;display:grid}.memory-card{aspect-ratio:1.04;cursor:pointer;perspective:700px;background:0 0;border:0;border-radius:12px;padding:0;position:relative}.memory-card-back,.memory-card-face{border-radius:inherit;backface-visibility:hidden;place-items:center;transition:transform .22s,background .18s;display:grid;position:absolute;inset:0}.memory-card-back{color:#9286e8;background:linear-gradient(145deg,#f1efff,#e8e5ff);font-size:23px}.memory-card-face{background:#fff8f1;font-size:clamp(24px,6vw,36px);transform:rotateY(180deg)}.memory-card.is-flipped .memory-card-back,.memory-card.is-matched .memory-card-back{transform:rotateY(180deg)}.memory-card.is-flipped .memory-card-face,.memory-card.is-matched .memory-card-face{transform:rotateY(0)}.memory-card.is-matched .memory-card-face{background:#effaf4;box-shadow:inset 0 0 0 2px #ccebd9}.memory-card:not(.is-matched):hover .memory-card-back{background:#e8e4ff}.sudoku-mistakes{color:#96939f;font-size:11px}.sudoku-mistakes strong{color:#d77870}.sudoku-board{background:#fff;border:2px solid #8277d7;border-radius:5px;grid-template-columns:repeat(9,minmax(0,1fr));width:min(100%,450px);margin:19px auto 14px;display:grid;overflow:hidden}.sudoku-cell{aspect-ratio:1;color:#5f52c1;cursor:pointer;background:#fff;border:1px solid #dedde8;border-top:0;border-left:0;place-items:center;min-width:0;padding:0;font-size:clamp(15px,4vw,23px);font-weight:500;display:grid}.sudoku-cell:nth-child(3n){border-right:2px solid #aaa3d8}.sudoku-cell:nth-child(n+19):nth-child(-n+27),.sudoku-cell:nth-child(n+46):nth-child(-n+54){border-bottom:2px solid #aaa3d8}.sudoku-cell:nth-child(9n){border-right:0}.sudoku-cell:nth-child(n+73){border-bottom:0}.sudoku-cell.is-fixed{color:#45434f;font-weight:700}.sudoku-cell.is-peer,.sudoku-cell.is-same-number{background:#f2f0ff}.sudoku-cell.is-selected{z-index:1;background:#e4e0ff;position:relative;box-shadow:inset 0 0 0 2px #8b7bed}.sudoku-cell.has-conflict{color:#d05850;background:#fff0ee}.sudoku-note-grid{color:#8d89a2;grid-template-rows:repeat(3,1fr);grid-template-columns:repeat(3,1fr);place-items:center;width:100%;height:100%;font-size:clamp(6px,1.5vw,9px);line-height:1;display:grid}.sudoku-tools{align-items:center;gap:8px;width:min(100%,450px);margin:0 auto 10px;display:flex}.sudoku-tool{color:#777583;cursor:pointer;background:#fff;border:1px solid #ecebf2;border-radius:8px;min-height:36px;padding:7px 12px;font-size:11px}.sudoku-tool.is-active{color:#6254c7;background:#f3f1ff;border-color:#d7d1ff}.sudoku-check{border-color:var(--purple);background:var(--purple);color:#fff;margin-left:auto}.sudoku-check:hover{background:var(--purple-dark)}.sudoku-numbers{grid-template-columns:repeat(9,minmax(0,1fr));gap:5px;width:min(100%,450px);margin:0 auto;display:grid}.sudoku-numbers button{color:#6457c4;cursor:pointer;background:#faf9ff;border:1px solid #eeedf3;border-radius:7px;min-width:0;height:38px;padding:0;font-size:16px;font-weight:600}.sudoku-numbers button:hover{background:#f0edff;border-color:#c9c2ff}.game-topline,.game-bottom,.expression-heading,.action-row{justify-content:space-between;align-items:center;display:flex}.round-label{color:#737480;align-items:center;gap:7px;font-size:12px;font-weight:600;display:flex}.round-icon{color:#8b7bed;font-size:16px}.streak{color:#8c7180;background:#fff7f2;border-radius:20px;align-items:center;gap:5px;padding:6px 10px;font-size:11px;display:flex}.streak strong{color:#e18351}.challenge{background:linear-gradient(110deg,#f8f6ff,#f5f4ff 60%,#f8f7ff);border:1px solid #eeebff;border-radius:14px;justify-content:space-between;align-items:center;margin:18px 0 19px;padding:17px 20px;display:flex}.challenge-label{color:#858292;font-size:11px;font-weight:600}.target-number{color:var(--purple);letter-spacing:-2px;margin-top:1px;font-size:41px;font-weight:800;line-height:1}.target-number span{letter-spacing:0;margin-left:5px;font-size:15px}.challenge-hint{color:#898896;text-align:right;margin:0;font-size:11px;line-height:1.8}.number-row{grid-template-columns:repeat(4,1fr);gap:12px;display:grid}.number-card{color:#34313f;cursor:pointer;background:#fff;border:1px solid #e8e7f2;border-radius:13px;height:74px;font-size:32px;font-weight:700;transition:transform .14s,border-color .14s,background .14s;position:relative;box-shadow:0 3px 8px #2524470b}.number-card:hover:not(:disabled){background:#faf9ff;border-color:#b7adfa;transform:translateY(-2px)}.number-card.is-used{color:#bbb9c5;box-shadow:none;cursor:default;background:#f6f6f8;border-color:#f0eff3}.number-card.is-selected{color:#594bc1;background:#f3f1ff;border-color:#9c8ff1;transform:translateY(-2px);box-shadow:0 0 0 2px #6b58e81f}.number-card.is-selected:after{color:#fff;content:attr(data-selection-order);background:#6b58e8;border-radius:50%;place-items:center;width:17px;height:17px;font-size:10px;line-height:1;display:grid;position:absolute;top:5px;right:6px}.number-card:disabled{cursor:default}.merge-instruction{color:#8d89a0;text-align:center;margin:0 0 8px;font-size:11px}.steps-panel{margin-top:17px}.expression-heading{color:#5e5e69;margin-bottom:7px;font-size:11px;font-weight:700}.expression-help{color:#a4a4ae;font-size:10px;font-weight:400}.steps-list{background:#faf9ff;border:1px solid #eeecf8;border-radius:10px;gap:5px;min-height:54px;margin:0;padding:9px 11px;list-style:none;display:grid}.steps-placeholder{color:#b1afbe;align-items:center;min-height:34px;font-size:11px;display:flex}.step-item{color:#5043a8;font-variant-numeric:tabular-nums;align-items:center;gap:9px;min-height:24px;font-size:13px;font-weight:600;display:flex}.step-number{color:#8376df;background:#eeebff;border-radius:50%;flex:0 0 20px;place-items:center;width:20px;height:20px;font-size:10px;font-weight:700;display:grid}.keypad{margin-top:12px}.operator-row{grid-template-columns:repeat(4,1fr);gap:8px;display:grid}.key{color:#5d5a70;cursor:pointer;background:#fff;border:1px solid #efeff3;border-radius:9px;height:40px;transition:background .13s,border-color .13s,color .13s}.operator-key{font-size:19px;font-weight:600}.operator-key.is-active{color:#594bc1;background:#f0edff;border-color:#9c8ff1;box-shadow:inset 0 0 0 1px #6b58e81f}.bracket-key{color:#9997a4;font-size:15px}.key:hover:not(:disabled){color:var(--purple);background:#f7f5ff;border-color:#dcd7ff}.key:disabled{cursor:not-allowed;opacity:.5}.action-row{justify-content:flex-end;gap:15px;margin-top:12px}.text-button{color:#8b8b96;cursor:pointer;background:0 0;border:0;padding:8px 0;font-size:11px}.text-button:disabled{cursor:default;opacity:.45}.check-button{background:var(--purple);color:#fff;cursor:pointer;border:0;border-radius:9px;min-width:104px;padding:10px 15px;font-size:12px;font-weight:600;transition:background .13s,transform .13s;box-shadow:0 4px 10px #6b58e82e}.check-button:hover:not(:disabled){background:var(--purple-dark);transform:translateY(-1px)}.check-button:disabled{cursor:default;opacity:.55}.check-button span{margin-left:7px}.game-feedback{color:#888499;background:#faf9ff;border-radius:8px;align-items:center;gap:7px;min-height:37px;margin-top:13px;padding:8px 11px;font-size:10px;line-height:1.5;display:flex}.feedback-mark{color:#998de9;font-size:13px}.feedback-error{color:#ba7068;background:#fff8f6}.feedback-error .feedback-mark{color:#db8e78}.feedback-success{color:#3e9472;background:#f2fbf6}.feedback-success .feedback-mark{color:#50ad83}.game-bottom{color:#aaaab3;margin-top:12px;font-size:10px}.keyboard-hint{margin-right:4px}.next-button{color:#777583;cursor:pointer;background:0 0;border:0;padding:5px 0 5px 8px;font-size:10px}.next-button:hover{color:var(--purple)}.next-button span{margin-left:4px;font-size:13px}.site-footer{color:#a2a3ad;border-top:1px solid #e8e9ef;justify-content:space-between;margin-top:55px;padding:16px 0 23px;font-size:10px;display:flex}.site-footer a{color:#8e86c8;text-decoration:none}@media (width<=600px){.site-header,main,.site-footer{width:min(100% - 32px,480px)}.site-header{height:54px}.header-note{display:none}main{padding-top:10px}.intro{justify-content:center;align-items:center;margin-bottom:8px;display:flex}.intro .eyebrow,.intro p{display:none}.intro h1{letter-spacing:-.5px;margin:0;font-size:19px;line-height:1.35}.game-tabs{border-radius:10px;gap:3px;margin-bottom:8px;padding:4px}.game-tab{gap:5px;padding:9px 5px;font-size:11px}.game-shell{border-radius:16px;padding:13px 12px 12px}.challenge{margin:12px 0;padding:12px 15px}.number-row{gap:8px}.number-card{height:60px;font-size:28px}.steps-panel{margin-top:13px}.memory-board{gap:8px;margin:15px auto 12px}.memory-card{border-radius:9px}.sudoku-board{margin-top:13px}.sudoku-tools{gap:5px}.sudoku-tool{padding-inline:8px;font-size:10px}.sudoku-numbers{gap:3px}.sudoku-numbers button{height:34px;font-size:15px}.site-footer{margin-top:22px}}@media (width<=380px){.site-header,main,.site-footer{width:calc(100% - 24px)}.game-shell{padding-inline:12px}.operator-row{gap:5px}.memory-stats{gap:7px;font-size:10px}.sudoku-tool{padding-inline:6px}.sudoku-numbers button{height:31px}}