:root{--text:#000;--text-h:#000;--bg:#fff;--border:#000;--code-bg:#eee;--accent:#000;--accent-bg:#0000001a;--accent-border:#00000080;--social-bg:#0000001a;--shadow:#0000001a 0 10px 15px -3px, #0000000d 0 4px 6px -2px;--sans:system-ui, "Segoe UI", Roboto, sans-serif;--heading:system-ui, "Segoe UI", Roboto, sans-serif;--mono:ui-monospace, Consolas, monospace;font:18px/145% var(--sans);letter-spacing:.18px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;color:var(--text);background:var(--bg);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}@media (width<=1024px){:root{font-size:16px}}[data-theme=dark]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--text:#fff;--text-h:#fff;--bg:#000;--border:#fff;--code-bg:#222;--accent:#fff;--accent-bg:#ffffff26;--accent-border:#ffffff80;--social-bg:#ffffff1a;--shadow:#fff6 0 10px 15px -3px, #ffffff40 0 4px 6px -2px}[data-theme=dark] #social .button-icon{filter:invert()brightness(2)}body{margin:0}#root{text-align:center;border-inline:1px solid var(--border);box-sizing:border-box;flex-direction:column;width:1200px;max-width:100%;min-height:100svh;margin:0 auto;display:flex}h1,h2{font-family:var(--heading);color:var(--text-h);font-weight:500}h1{letter-spacing:-1.68px;margin:32px 0;font-size:56px}@media (width<=1024px){h1{margin:20px 0;font-size:36px}}h2{letter-spacing:-.24px;margin:0 0 8px;font-size:24px;line-height:118%}@media (width<=1024px){h2{font-size:20px}}p{margin:0}code,.counter{font-family:var(--mono);color:var(--text-h);border-radius:4px;display:inline-flex}code{background:var(--code-bg);padding:4px 8px;font-size:15px;line-height:135%}#header{justify-content:space-between;align-items:center;padding:10px;display:flex}.header-right{align-items:center;gap:10px;display:flex}.sudoku-container{justify-content:center;margin:20px 0;display:flex}.sudoku-grid{border:2px solid var(--text);grid-template-rows:repeat(9,60px);grid-template-columns:repeat(9,60px);display:grid}.sudoku-cell{text-align:center;border:1px solid var(--border);width:100%;height:100%;color:var(--text);box-sizing:border-box;background-color:#0000;outline:none;justify-content:center;align-items:center;margin:0;padding:0;font-size:30px;transition:background-color .2s,transform .15s;display:flex}.sudoku-cell:focus{background-color:var(--accent-bg)}.border-right-thick{border-right:2px solid var(--text)}.border-bottom-thick{border-bottom:2px solid var(--text)}.sudoku-cell.initial-cell{background-color:var(--accent-bg);-webkit-user-select:none;user-select:none;cursor:default;font-weight:700}.sudoku-cell.input-cell{cursor:text;font-weight:400}.sudoku-cell.input-cell:not(.invalid-cell):not(.valid-cell):not(.correct-cell):hover{background-color:#00000008}[data-theme=dark] .sudoku-cell.input-cell:not(.invalid-cell):not(.valid-cell):not(.correct-cell):hover{background-color:#ffffff08}.sudoku-cell.input-cell.invalid-cell{color:#ef4444;background-color:#ef444433}.sudoku-cell.input-cell.valid-cell{color:#b56005;background-color:#f59e0b33}[data-theme=dark] .sudoku-cell.input-cell.valid-cell{color:#f59e0b}.sudoku-cell.input-cell.correct-cell{color:#059669;background-color:#10b98133}[data-theme=dark] .sudoku-cell.input-cell.correct-cell{color:#34d399}.settings-overlay{z-index:1000;background-color:#00000080;justify-content:center;align-items:center;width:100vw;height:100vh;display:flex;position:fixed;top:0;left:0}.settings-modal{background-color:var(--bg);color:var(--text);min-width:400px;min-height:300px;box-shadow:var(--shadow);border:1px solid var(--border);border-radius:8px;flex-direction:column;padding:20px;display:flex}.settings-header{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;margin-bottom:20px;padding-bottom:10px;display:flex}.settings-header h2{margin:0}.settings-header button{cursor:pointer;color:var(--text);background:0 0;border:none;font-size:18px}.settings-content{flex-grow:1}.settings-row{justify-content:space-between;align-items:center;margin-bottom:20px;display:flex}.settings-label{font-size:16px;font-weight:500;font-family:var(--sans)}.difficulty-options{gap:8px;display:flex}.difficulty-btn{color:var(--text);border:1px solid var(--border);cursor:pointer;font-size:14px;font-weight:500;font-family:var(--sans);background-color:#0000;border-radius:6px;padding:8px 16px;transition:all .2s cubic-bezier(.4,0,.2,1)}.difficulty-btn:hover{background-color:var(--accent-bg)}.difficulty-btn.active{background-color:var(--text);color:var(--bg);border-color:var(--border);font-weight:600}.settings-action-btn{background-color:var(--text);color:var(--bg);border:1px solid var(--border);cursor:pointer;font-size:14px;font-weight:600;font-family:var(--sans);border-radius:6px;padding:8px 24px;transition:all .2s cubic-bezier(.4,0,.2,1)}.settings-action-btn:hover:not(:disabled){background-color:var(--bg);color:var(--text)}.settings-action-btn:disabled{opacity:.5;cursor:not-allowed}.generate-container{justify-content:center;gap:12px;margin-top:10px;margin-bottom:10px;display:flex}.generate-btn{background:var(--text);color:var(--bg);border:2px solid var(--border);cursor:pointer;font-size:16px;font-weight:600;font-family:var(--sans);letter-spacing:.5px;box-shadow:var(--shadow);border-radius:8px;padding:12px 28px;transition:all .25s cubic-bezier(.4,0,.2,1)}.generate-btn:hover{background:var(--bg);color:var(--text);transform:translateY(-2px);box-shadow:0 6px 20px #00000026}[data-theme=dark] .generate-btn:hover{box-shadow:0 6px 20px #ffffff26}.generate-btn:active{transform:translateY(0)}.clear-inputs-btn,.clear-board-btn{background:var(--bg);color:var(--text);border:2px solid var(--border);cursor:pointer;font-size:16px;font-weight:600;font-family:var(--sans);letter-spacing:.5px;border-radius:8px;padding:12px 28px;transition:all .25s cubic-bezier(.4,0,.2,1)}.clear-inputs-btn:hover,.clear-board-btn:hover{background:var(--text);color:var(--bg);transform:translateY(-2px);box-shadow:0 6px 20px #00000026}[data-theme=dark] .clear-inputs-btn:hover,[data-theme=dark] .clear-board-btn:hover{box-shadow:0 6px 20px #ffffff26}.clear-inputs-btn:active,.clear-board-btn:active{transform:translateY(0)}.sudoku-timer{font-family:var(--mono);color:var(--text);border:1px solid var(--border);background-color:var(--social-bg);letter-spacing:.5px;-webkit-user-select:none;user-select:none;border-radius:6px;align-items:center;gap:12px;padding:8px 12px;font-size:18px;font-weight:600;display:inline-flex}.timer-btn{cursor:pointer;color:inherit;background:0 0;border:none;border-radius:4px;justify-content:center;align-items:center;margin:0;padding:2px;transition:background-color .2s,opacity .2s;display:flex}.timer-btn:hover{background-color:#00000014}[data-theme=dark] .timer-btn:hover{background-color:#ffffff1f}.timer-btn:disabled{opacity:.4;cursor:not-allowed}.timer-btn img{width:20px;height:20px;display:block}[data-theme=dark] .timer-btn img{filter:invert()}