:root{--background: #f5f2ec;--foreground: #1c1a17;--surface: 255 255 255;--hairline: 28 26 23;--accent: #3b66f5;--accent-rgb: 59 102 245;--shadow-color: 28 26 23;--error: 220 38 38;--user-number: #f97316}:root.dark{--background: #14130f;--foreground: #f1efe9;--surface: 30 28 24;--hairline: 255 255 255;--accent: #5b82ff;--accent-rgb: 91 130 255;--shadow-color: 0 0 0;--error: 239 68 68;--user-number: #fb923c}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{height:100%;overflow:hidden;background:var(--background)}body{height:100%;width:100%;overflow:hidden;position:fixed;background:var(--background);color:var(--foreground);font-family:Geist,system-ui,sans-serif;-webkit-font-smoothing:antialiased;overscroll-behavior:none}*{scrollbar-width:thin;scrollbar-color:rgba(var(--hairline) / .25) transparent}button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}button:disabled{opacity:.4;cursor:default}.glass-panel{background:rgba(var(--surface) / .72);-webkit-backdrop-filter:blur(20px) saturate(150%);backdrop-filter:blur(20px) saturate(150%);border:1px solid rgba(var(--hairline) / .08);box-shadow:0 1px 2px rgba(var(--shadow-color) / .04),0 16px 40px -8px rgba(var(--shadow-color) / .18)}.glass-control{background:rgba(var(--surface) / .85);-webkit-backdrop-filter:blur(16px) saturate(150%);backdrop-filter:blur(16px) saturate(150%);border:1px solid rgba(var(--hairline) / .08);box-shadow:0 1px 2px rgba(var(--shadow-color) / .04),0 8px 24px -6px rgba(var(--shadow-color) / .16)}@keyframes fade-slide-up{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@keyframes slide-up{0%{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}@keyframes fade-in{0%{opacity:0}to{opacity:1}}.animate-fade-slide-up{animation:fade-slide-up .22s cubic-bezier(.16,1,.3,1)}.animate-slide-up{animation:slide-up .32s cubic-bezier(.16,1,.3,1)}.animate-fade-in{animation:fade-in .2s ease-out}#root{height:100%;display:flex;flex-direction:column;overflow:hidden}.app{display:flex;flex-direction:column;height:100dvh;width:100%;max-width:480px;margin:0 auto;padding-top:max(56px,env(safe-area-inset-top));padding-right:max(12px,env(safe-area-inset-right));padding-bottom:max(36px,env(safe-area-inset-bottom));padding-left:max(12px,env(safe-area-inset-left));gap:12px;overflow:hidden}.top-bar{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;padding:10px 14px;border-radius:16px;flex-shrink:0;gap:4px}.top-bar-left{display:flex;align-items:center;gap:6px}.top-bar-right{display:flex;align-items:center;justify-content:flex-end}.difficulty-chip{font-size:13px;font-weight:600;color:var(--accent);background:rgba(var(--accent-rgb) / .1);padding:3px 10px;border-radius:9999px}.timer-group{display:flex;align-items:center;gap:2px}.timer{font-size:15px;font-weight:500;font-variant-numeric:tabular-nums;color:var(--foreground);opacity:.7;min-width:36px}.icon-btn{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:9999px;color:rgba(var(--hairline) / .5);transition:background .15s,color .15s}.icon-btn svg{width:18px;height:18px}.icon-btn:hover{background:rgba(var(--hairline) / .06);color:var(--foreground)}.grid-wrapper{flex:1;min-height:0;position:relative;display:flex;align-items:center;justify-content:center;width:100%}.bottom-controls{display:flex;flex-direction:column;gap:10px;flex-shrink:0}.grid{display:grid;grid-template-columns:repeat(9,1fr);width:100%;aspect-ratio:1;border:2px solid rgba(var(--hairline) / .2);border-radius:12px;overflow:hidden}.cell{position:relative;display:flex;align-items:center;justify-content:center;aspect-ratio:1;background:rgba(var(--surface) / .55);border-right:1px solid rgba(var(--hairline) / .1);border-bottom:1px solid rgba(var(--hairline) / .1);transition:background .12s;-webkit-tap-highlight-color:transparent;touch-action:manipulation}.cell:last-child,.cell:nth-child(9n){border-right:none}.cell:nth-last-child(-n+9){border-bottom:none}.cell--border-right{border-right:2px solid rgba(var(--hairline) / .22)!important}.cell--border-bottom{border-bottom:2px solid rgba(var(--hairline) / .22)!important}.cell--selected{background:rgba(var(--accent-rgb) / .16)!important}.cell--highlighted{background:rgba(var(--accent-rgb) / .06)}.cell--same-number{background:#fb923c47}.cell--error{background:rgba(var(--error) / .13)!important}.cell-value{font-size:clamp(20px,7vw,34px);font-weight:400;color:var(--user-number);line-height:1}.cell--given .cell-value{font-weight:600;color:var(--foreground)}.cell--error .cell-value{color:rgb(var(--error))}.cell-candidates{display:grid;grid-template-columns:repeat(3,1fr);width:100%;height:100%;padding:1px}.candidate{font-size:clamp(6px,1.8vw,9px);font-weight:500;display:flex;align-items:center;justify-content:center;color:transparent;line-height:1}.candidate--visible{color:var(--accent);opacity:.75}.controls{display:flex;gap:8px;flex-shrink:0;width:100%}.control-btn{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;padding:10px 6px;border-radius:12px;font-size:11px;font-weight:500;color:rgba(var(--hairline) / .55);background:rgba(var(--surface) / .6);border:1px solid rgba(var(--hairline) / .07);transition:background .15s,color .15s;-webkit-tap-highlight-color:transparent}.control-btn svg{width:20px;height:20px}.control-btn:hover:not(:disabled){background:rgba(var(--surface) / .9);color:var(--foreground)}.control-btn--active{background:rgba(var(--accent-rgb) / .1)!important;color:var(--accent)!important;border-color:rgba(var(--accent-rgb) / .2)!important}.control-btn--dev{background:#eab3081a!important;color:#a17800!important;border-color:#eab30840!important}:root.dark .control-btn--dev{color:#eab308!important}.number-pad{display:grid;grid-template-columns:repeat(9,minmax(0,1fr));gap:4px;flex-shrink:0;width:100%}.number-btn{aspect-ratio:1;font-size:clamp(26px,8vw,40px);font-weight:500;border-radius:8px;background:none;border:none;transition:background .12s,transform 80ms;-webkit-tap-highlight-color:transparent;touch-action:manipulation}.number-btn:hover{background:rgba(var(--hairline) / .06)}.number-btn:active{transform:scale(.88)}.overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:rgba(var(--shadow-color) / .3);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:100;display:flex;align-items:flex-end;animation:fade-in .2s ease-out}.overlay--center{align-items:center;justify-content:center;padding:24px}.pause-overlay{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:8px;background:rgba(var(--surface) / .88);-webkit-backdrop-filter:blur(10px) saturate(150%);backdrop-filter:blur(10px) saturate(150%);border-radius:12px;animation:fade-in .15s ease-out;z-index:10}.pause-overlay-label{font-size:18px;font-weight:600;color:var(--foreground);opacity:.6}.pause-overlay-hint{font-size:13px;color:var(--foreground);opacity:.35}.settings-panel{width:100%;max-width:480px;margin:0 auto;border-radius:20px 20px 0 0;padding:20px 20px 16px;padding-bottom:max(16px,env(safe-area-inset-bottom));display:flex;flex-direction:column;gap:2px;max-height:82dvh;overflow-y:auto;-webkit-overflow-scrolling:touch}.settings-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}.settings-title{font-size:16px;font-weight:600}.settings-section-label{font-size:10px;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:rgba(var(--hairline) / .4);padding:10px 0 6px}.settings-divider{height:1px;background:rgba(var(--hairline) / .06);margin:6px 0}.settings-toggle{display:flex;align-items:center;justify-content:space-between;padding:10px 0;cursor:pointer}.settings-toggle-label{font-size:14px;font-weight:400}.toggle-switch{position:relative;width:42px;height:24px;border-radius:9999px;background:rgba(var(--hairline) / .15);transition:background .2s;flex-shrink:0}.toggle-switch--on{background:var(--accent)}.toggle-thumb{position:absolute;top:3px;left:3px;width:18px;height:18px;border-radius:9999px;background:#fff;box-shadow:0 1px 3px #0003;transition:transform .2s cubic-bezier(.16,1,.3,1)}.toggle-switch--on .toggle-thumb{transform:translate(18px)}.difficulty-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;padding:4px 0 0}.difficulty-btn{padding:10px;border-radius:10px;font-size:13px;font-weight:500;background:rgba(var(--hairline) / .06);border:1px solid rgba(var(--hairline) / .07);transition:background .15s}.difficulty-btn:hover{background:rgba(var(--accent-rgb) / .1);color:var(--accent)}.win-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:150;background:rgba(var(--shadow-color) / .4);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);display:flex;align-items:center;justify-content:center;padding:24px;animation:fade-in .2s ease-out}.win-modal{position:relative;width:100%;max-width:340px;background:#fff;border-radius:20px;padding:28px 20px 20px;display:flex;flex-direction:column;align-items:center;gap:14px;text-align:center;box-shadow:0 24px 64px rgba(var(--shadow-color) / .28);animation:fade-slide-up .28s cubic-bezier(.16,1,.3,1)}:root.dark .win-modal{background:#1e1c18}.win-dismiss{position:absolute;top:10px;right:10px;color:rgba(var(--hairline) / .35)}.win-panel{width:100%;display:flex;flex-direction:column;align-items:center;gap:14px}.win-icon{width:60px;height:60px;border-radius:9999px;background:rgba(var(--accent-rgb) / .12);color:var(--accent);font-size:30px;display:flex;align-items:center;justify-content:center}.win-title{font-size:24px;font-weight:700}.win-stats{display:flex;align-items:center;gap:10px}.win-time{font-size:15px;font-weight:500;font-variant-numeric:tabular-nums;opacity:.55}.win-new-game{width:100%;display:flex;flex-direction:column;gap:8px;margin-top:8px}.win-difficulty-btn{width:100%;border-radius:12px;font-size:15px;font-weight:500;background:rgba(var(--hairline) / .06);border:1px solid rgba(var(--hairline) / .07);color:var(--foreground);transition:background .15s,color .15s;text-align:left;padding:14px 14px 14px 18px}.win-difficulty-btn:hover{background:rgba(var(--accent-rgb) / .08);color:var(--accent)}.win-difficulty-btn--current{background:rgba(var(--accent-rgb) / .1);color:var(--accent);border-color:rgba(var(--accent-rgb) / .18)}@keyframes confetti-fall{0%{transform:translateY(-80px) rotate(0);opacity:1}80%{opacity:1}to{transform:translateY(110vh) rotate(540deg);opacity:0}}.confetti-container{position:fixed;top:0;right:0;bottom:0;left:0;pointer-events:none;z-index:200;overflow:hidden}.confetti-piece{position:absolute;top:0;line-height:1;animation:confetti-fall linear forwards;will-change:transform}.btn-primary{width:100%;padding:11px;border-radius:12px;font-size:14px;font-weight:500;background:var(--accent);color:#fff;transition:filter .15s;active:scale(.98)}.btn-primary:hover{filter:brightness(1.08)}.btn-primary:active{transform:scale(.98)}.btn-secondary{width:100%;padding:11px;border-radius:12px;font-size:14px;font-weight:500;background:rgba(var(--hairline) / .06);color:var(--foreground);border:1px solid rgba(var(--hairline) / .07);transition:background .15s}.btn-secondary:hover{background:rgba(var(--hairline) / .1)}