:root{font-family:Trebuchet MS,Arial,sans-serif;color:#203e48;background:#f6f4ee;font-synthesis:none;--bg:#f6f4ee;--card:#fffefa;--ink:#203e48;--muted:#5d716f;--line:#dce3db;--accent:#286455;--soft:#eaf0e5;--number:#f0f2eb;--shadow:0 8px 30px #263d3010;--cell:54px;color-scheme:light}:root[data-theme=dark]{--bg:#102b39;--card:#193744;--ink:#f7f5ec;--muted:#b6c9c6;--line:#3d5862;--accent:#b9dfbc;--soft:#294b49;--number:#244652;--shadow:0 8px 30px #0002;background:var(--bg);color:var(--ink);color-scheme:dark}*{box-sizing:border-box}body{margin:0}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer;min-height:48px;border:1px solid var(--line);border-radius:14px;background:var(--card);color:var(--ink);padding:10px 18px;transition:background .15s,transform .15s}button:hover:not(:disabled){filter:brightness(.96);border-color:var(--accent)}button:active:not(:disabled){transform:translateY(1px)}button:disabled{cursor:default;opacity:.5}button:focus-visible,a:focus-visible{outline:3px solid #c57927;outline-offset:4px}h1,h2,p{margin-top:0}p{line-height:1.6}h2{font-size:1.2rem;letter-spacing:-.025em}.app{max-width:1080px;margin:auto;padding:0 40px}header{display:flex;align-items:center;justify-content:space-between;padding:26px 0;border-bottom:1px solid var(--line);gap:12px}.brand{display:flex;align-items:center;gap:12px;color:var(--ink);text-decoration:none;font-weight:700;font-size:1.35rem}.brand img{width:48px;height:48px;border-radius:12px}.brand-sub{display:block;font-size:.6rem;letter-spacing:.16em;margin-top:5px;color:var(--muted)}.theme{display:flex;align-items:center;gap:10px;background:transparent;font-size:.95rem}.theme span{font-size:1.4rem}main{min-height:calc(100svh - 205px)}.intro{text-align:center;padding:44px 0 22px}.eyebrow{font-size:.68rem;font-weight:700;letter-spacing:.18em;color:var(--accent)}.intro h1{font-family:Georgia,serif;font-weight:400;font-size:3.8rem;line-height:1.04;letter-spacing:-.055em;margin:18px 0}.intro h1 em{font-weight:400;color:var(--accent)}.intro p{color:var(--muted);font-size:1.05rem}.card{background:var(--card);border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow)}.settings{max-width:570px;margin:auto;padding:30px}.section-heading{display:flex;align-items:center;gap:12px}.section-heading h2{margin:0}.step{width:27px;height:27px;display:grid;place-items:center;background:var(--soft);border-radius:50%;font-size:.8rem;color:var(--accent);font-weight:700}.settings p{font-size:.88rem;color:var(--muted);margin:8px 0 18px}.operations{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.operation{position:relative;display:flex;align-items:center;flex-direction:column;padding:15px 5px 13px;gap:7px;font-size:.73rem;background:transparent}.operation .op-symbol{font-size:2rem;line-height:1.2}.operation.active{background:var(--soft);border:2px solid var(--accent);padding:14px 4px 12px}.tick{position:absolute;right:6px;top:4px;font-size:.7rem;color:var(--accent)}.operation:not(.active) .tick{display:none}.second{margin-top:28px;margin-bottom:16px}.levels{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.levels button{display:flex;align-items:center;flex-direction:column;gap:5px;background:transparent;padding:14px 6px}.levels button.active{border:2px solid var(--accent);background:var(--soft);padding:13px 5px}.level-dots{font-size:.65rem;letter-spacing:4px;color:var(--accent);margin-bottom:5px}.levels strong{font-size:.95rem}.levels small{font-size:.7rem;color:var(--muted)}.primary{background:var(--accent);color:var(--card);border-color:var(--accent);font-weight:700;min-height:54px;width:100%}:root[data-theme=dark] .primary{color:#16382f}.play{margin-top:26px;display:flex;justify-content:center;gap:20px;align-items:center;font-size:1.1rem}.play span{font-size:1.6rem;font-weight:400}.quiet{color:var(--muted)}.tip{text-align:center;font-size:.8rem;margin:22px 0 0}.text-button{border:0;background:transparent;box-shadow:none;text-decoration:underline;text-underline-offset:4px;font-size:.9rem;color:var(--muted)}.resume{display:block;margin:10px auto 0}.status{min-height:24px;margin:12px auto;color:var(--accent);text-align:center;max-width:600px;font-size:1rem}.status:not(:empty){padding:14px;border-radius:14px;background:var(--soft)}footer{border-top:1px solid var(--line);padding:18px 0;display:flex;align-items:center;gap:8px;color:var(--muted);font-size:.75rem;flex-wrap:wrap}footer .text-button{margin-left:auto;font-size:.75rem;padding-right:0}.offline-dot{width:7px;height:7px;border-radius:50%;background:var(--accent)}.game-heading{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:32px 0 22px}.game-heading h1{font-family:Georgia,serif;font-size:2rem;letter-spacing:-.045em;font-weight:400;margin:9px 0}.game-heading p{font-size:.9rem;color:var(--muted);margin:0}.progress{background:var(--soft);color:var(--accent);padding:12px 15px;border-radius:30px;font-size:1.1rem;font-weight:700;white-space:nowrap}.progress span{font-size:.8rem;font-weight:400}.game-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;align-items:start;gap:24px}.board-card{padding:24px;overflow:auto}.board-caption{display:flex;justify-content:space-between;color:var(--muted);font-size:.85rem;gap:12px;margin-bottom:24px}.board-caption>span+span{color:var(--accent)}.board{display:grid;grid-template-columns:repeat(5,var(--cell));justify-content:center;gap:0 6px}.number{width:var(--cell);height:var(--cell);display:flex;align-items:center;justify-content:center;font-size:1.6rem;position:relative;font-variant-numeric:tabular-nums;padding:0;border-radius:16px}.fixed{background:var(--number);font-weight:700}.editable{border:2px dashed #718f7c;color:var(--accent);background:var(--card)}.empty-mark{font-size:1.3rem;color:var(--muted)}.editable.selected{background:var(--soft);border:3px solid var(--accent);box-shadow:0 0 0 3px var(--soft)}.editable.correct{border-style:solid;border-color:var(--accent);background:var(--soft)}.editable.incorrect{border:2px solid #bf602c}.answer-mark{position:absolute;right:-4px;top:-5px;background:var(--ink);color:var(--card);width:18px;height:18px;display:grid;place-items:center;border-radius:50%;font-size:.7rem}.operator{display:grid;place-items:center;font-size:1.5rem;color:var(--muted)}.board-foot{text-align:center;color:var(--muted);font-size:.72rem;margin:24px 0 0}.tools{position:sticky;top:20px}.keypad-card{padding:22px}.keypad-card h2{margin-bottom:5px}.keypad-card p{font-size:.8rem;color:var(--muted);margin-bottom:12px}.entry{height:52px;display:grid;place-items:center;font-size:1.8rem;background:var(--number);border-radius:12px;margin-bottom:12px;color:var(--accent)}.keypad{display:grid;grid-template-columns:repeat(3,1fr);gap:7px;margin-bottom:12px}.keypad button{font-size:1.4rem;min-height:50px;padding:5px}.keypad .key-small{font-size:.65rem}.key-small span{display:block}.actions{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:16px}.actions button{font-size:.85rem;padding:10px 5px}.tools>.text-button{display:block;margin:5px auto}.celebration{text-align:center;padding:26px}.celebration p{font-size:.9rem;color:var(--muted)}.flower{font-size:4rem;color:var(--accent);display:block;margin:5px 0 15px}.update{padding:18px;margin:15px auto;max-width:570px}.update p{margin-bottom:8px}dialog{max-width:450px;width:calc(100% - 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.text-button{margin-left:0}.board-caption{font-size:.8rem}}@media(max-width:370px){.app{padding:0 12px}.settings{padding:18px}.operations{gap:6px}.operation{font-size:.64rem}.brand{font-size:1.15rem}.theme{padding:8px 10px}.board-card{padding:14px 8px}.board{--cell:48px;gap:0 3px}.game-heading h1{font-size:1.5rem}.intro h1{font-size:2.9rem}}@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}.answer-cell{position:relative;width:var(--cell);height:var(--cell)}input.number{font:inherit;font-size:1.6rem;text-align:center;appearance:none;-webkit-appearance:none;min-width:0;caret-color:var(--accent)}input.editable::placeholder{color:var(--muted);opacity:1}input.editable:focus{outline:3px solid var(--accent);outline-offset:2px;background:var(--soft);border-style:solid}input.editable[readonly]{cursor:default}.entry-help{font-size:1rem;line-height:1.6;margin:0 0 16px}.answer-mark{pointer-events:none}.back-nav{padding-top:22px}.back-nav a{display:inline-flex;min-height:48px;align-items:center;color:var(--muted);text-decoration:none;font-size:.95rem}.back-nav a:hover{text-decoration:underline}.back-nav+.game-page .game-heading{padding-top:10px}.game-catalog{max-width:640px;margin:0 auto 26px;display:grid;gap:16px}.game-tile{display:flex;align-items:center;gap:20px;text-decoration:none;color:var(--ink);padding:24px;transition:transform .15s,border-color .15s}.game-tile:hover{transform:translateY(-2px);border-color:var(--accent)}.game-tile h2{font-family:Georgia,serif;font-size:1.7rem;font-weight:400;margin:0 0 5px}.game-tile p{color:var(--muted);font-size:.9rem;margin:0}.tile-icon{width:66px;height:66px;border-radius:18px;display:grid;place-items:center;background:var(--soft);color:var(--accent);font-size:1.6rem;flex-shrink:0;font-family:Georgia,serif;white-space:nowrap}.tile-icon.sudoku{background:#efe4d1;color:#775124}.tile-icon.lingo{background:#e8e4f1;color:#5c507b}:root[data-theme=dark] .tile-icon.sudoku{background:#4a4332;color:#ead3aa}:root[data-theme=dark] .tile-icon.lingo{background:#413d57;color:#e0d5f5}.tile-arrow{font-size:1.5rem;margin-left:auto;color:var(--accent)}.hub{padding-bottom:25px}.game-page{max-width:760px;margin:auto}.game-page .game-heading{display:block}.game-page .game-heading p{max-width:560px}.puzzle-meta{max-width:540px;margin:0 auto 16px;display:flex;justify-content:space-between;gap:10px;font-size:.85rem;color:var(--muted)}.sudoku-levels{display:grid;grid-template-columns:1fr 1fr;gap:12px}.sudoku-levels button{display:flex;flex-direction:column;align-items:center;gap:10px;padding:20px 10px}.sudoku-levels strong{font-size:1.8rem}.sudoku-levels span{font-size:.8rem;color:var(--muted)}.sudoku-levels .active{background:var(--soft);border:2px solid var(--accent)}.sudoku-board{display:grid;margin:auto;border:3px solid var(--ink);border-radius:10px;overflow:hidden;box-shadow:var(--shadow)}.sudoku-cell{position:relative;aspect-ratio:1;border-right:1px solid var(--line);border-bottom:1px solid var(--line);min-width:0}.sudoku-cell.box-right{border-right:3px solid var(--ink)}.sudoku-cell.box-bottom{border-bottom:3px solid var(--ink)}.sudoku-given{width:100%;height:100%;display:grid;place-items:center;background:var(--number);font-size:clamp(1.25rem,4vw,1.8rem);font-weight:700}.sudoku-cell input{width:100%;height:100%;min-width:0;min-height:0;appearance:none;border:0;border-radius:0;background:var(--card);color:var(--accent);font:inherit;font-size:clamp(1.25rem,4vw,1.8rem);text-align:center;padding:0}.sudoku-cell input:focus{outline:3px solid var(--accent);outline-offset:-3px;background:var(--soft)}.sudoku-cell input::placeholder{color:var(--muted);opacity:.7;font-size:1rem}.sudoku-cell input.correct{background:var(--soft)}.sudoku-cell input.incorrect{box-shadow:inset 0 0 0 2px #bf602c}.sudoku-mark{position:absolute;top:1px;right:2px;font-size:.6rem;pointer-events:none}.game-controls,.game-finish{max-width:440px;margin:24px auto;text-align:center}.game-controls .text-button{display:block;margin:12px auto 0}.game-finish{padding:26px}.game-finish h2{font-family:Georgia,serif;font-size:1.8rem;font-weight:400}.game-finish p{color:var(--muted)}.word-preview{font-family:Georgia,serif;letter-spacing:.2em;color:var(--accent);font-size:2rem;margin-bottom:25px}.word-board{max-width:410px;margin:auto;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:8px;padding:16px;touch-action:none;user-select:none;-webkit-user-select:none}.letter-cell{position:relative;min-width:0;aspect-ratio:1;min-height:48px;padding:0;font-size:clamp(1.2rem,5vw,1.8rem);border-radius:12px;font-weight:700;touch-action:none}.letter-cell.found{background:var(--soft);border-color:var(--accent);color:var(--accent)}.letter-cell.tracing{background:var(--accent);color:var(--card);border-color:var(--accent)}:root[data-theme=dark] .letter-cell.tracing{color:#16382f}.letter-cell.hinted{outline:3px solid #b87925;outline-offset:1px}.letter-cell small{position:absolute;right:3px;top:0;font-size:.6rem}.word-list{list-style:none;display:flex;justify-content:center;flex-wrap:wrap;gap:10px;padding:0;max-width:480px;margin:22px auto}.word-list li{background:var(--card);border:1px solid var(--line);padding:10px 14px;border-radius:25px;font-size:.9rem;letter-spacing:.03em}.word-list .word-done{background:var(--soft);color:var(--accent);text-decoration:line-through}.hint-button{min-width:150px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media(max-width:400px){.game-tile{gap:14px;padding:18px}.tile-icon{width:52px;height:52px;font-size:1.3rem}.game-tile h2{font-size:1.5rem}.game-tile p{font-size:.82rem}.word-board{padding:10px;gap:5px}.brand{font-size:1.1rem}.brand img{width:42px;height:42px}.brand-sub{font-size:.5rem}.game-heading h1{font-size:1.65rem}.puzzle-meta{font-size:.75rem}}