@import"https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&display=swap";:root{--bg-color: #0f0f11;--bg-surface: #1c1c1e;--text-primary: #f0f0f0;--text-secondary: #888888;--accent: #b5b161;--border-color: #333333;--error-color: #e57373}*{box-sizing:border-box;margin:0;padding:0;-webkit-user-select:none;user-select:none}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background-color:var(--bg-color);color:var(--text-primary);line-height:1.5;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;display:flex;justify-content:center;align-items:center;min-height:100vh;width:100vw;overflow:hidden}#root{width:100%;height:100%;max-width:600px;position:relative;display:flex;flex-direction:column}button{font-family:inherit;background:none;border:none;color:inherit;cursor:pointer;outline:none;transition:all .2s ease}.btn-outline{width:100%;padding:16px;border-radius:9999px;border:1px solid var(--border-color);font-size:16px;font-weight:500;margin-bottom:12px;display:flex;justify-content:center;align-items:center}.btn-outline:hover,.btn-outline:active{background-color:#ffffff0d}.btn-outline.active{border-color:var(--accent);color:var(--accent)}.flex-center{display:flex;justify-content:center;align-items:center}.flex-between{display:flex;justify-content:space-between;align-items:center}.fade-in{animation:fadeIn .4s ease-out forwards}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.slide-in{animation:slideIn .2s ease-out forwards}@keyframes slideIn{0%{opacity:0;transform:translate(10px)}to{opacity:1;transform:translate(0)}}.game-screen{display:flex;flex-direction:column;height:100%;width:100%}.board-container{flex:1;padding:20px;max-width:500px;margin:0 auto;width:100%}.sudoku-board{display:grid;grid-template-columns:repeat(9,1fr);width:100%;aspect-ratio:1;background-color:var(--border-color);gap:1px;border:2px solid var(--text-secondary)}.cell{background-color:var(--bg-surface);cursor:pointer;position:relative;transition:background-color .15s ease}.cell:nth-child(3n){border-right:2px solid var(--text-secondary)}.cell:nth-child(9n){border-right:none}.sudoku-board .cell:nth-child(n+19):nth-child(-n+27),.sudoku-board .cell:nth-child(n+46):nth-child(-n+54){border-bottom:2px solid var(--text-secondary)}.cell-value{font-size:24px;font-weight:500}.cell.given .cell-value{color:var(--text-primary);font-weight:600}.cell:not(.given) .cell-value{color:#5c9df5;font-weight:400}.cell.selected{background-color:#b5b16166}.cell.related{background-color:#ffffff0d}.cell.same-value{background-color:#b5b16133}.notes-grid{display:grid;grid-template-columns:repeat(3,1fr);grid-template-rows:repeat(3,1fr);width:100%;height:100%;padding:2px}.note-num{font-size:10px;color:var(--text-secondary);display:flex;justify-content:center;align-items:center;line-height:1}.tools-bar{padding:10px 40px;color:var(--text-secondary)}.tool-btn{display:flex;flex-direction:column;align-items:center;gap:4px;opacity:.6}.tool-btn.active{color:var(--accent);opacity:1}.numpad{display:grid;grid-template-columns:repeat(5,1fr);gap:12px;padding:20px 24px 40px;max-width:500px;margin:0 auto;width:100%}.num-btn-container{display:flex;flex-direction:column;align-items:center;gap:4px;background:none;border:none;padding:0;outline:none;cursor:pointer}.num-btn-container.faded{opacity:.2}.num-btn{background-color:var(--bg-surface);color:var(--text-primary);border-radius:50%;width:100%;aspect-ratio:1;font-size:24px;font-weight:500;display:flex;justify-content:center;align-items:center;transition:all .1s ease}.num-btn:active{transform:scale(.9);background-color:var(--accent);color:var(--bg-color)}.num-btn.clear-btn{background-color:transparent;color:var(--text-secondary);border:1px solid var(--border-color)}.num-btn.global-active{background-color:var(--accent);color:var(--bg-color)}.num-rem{font-size:12px;color:var(--text-secondary);height:14px}.clear-btn-container{justify-content:flex-start}.modal-overlay{position:absolute;top:0;left:0;right:0;bottom:0;background-color:#0f0f11d9;z-index:100}.leaderboard-overlay{position:absolute;top:0;left:0;right:0;bottom:0;background-color:#0f0f11f2;display:flex;flex-direction:column;justify-content:center;align-items:center;z-index:10;padding:20px}.leaderboard-list{width:100%;max-width:300px;background-color:var(--bg-surface);border-radius:12px;padding:16px;border:1px solid var(--border-color)}.record-item{color:var(--text-primary);padding:8px 0;border-bottom:1px solid var(--border-color);font-size:14px}.record-item:last-child{border-bottom:none}