:root{--identity-accent: #2f6fb3;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:#102a5b;background:#edf2fb;font-synthesis:none}*{box-sizing:border-box}body{margin:0;min-width:320px}button{font:inherit}.app-shell{width:min(100%,740px);min-height:100vh;margin:0 auto;padding:clamp(24px,4vw,42px) clamp(16px,3.5vw,34px) 34px;background:#fff}.home-header{text-align:center}.welcome{margin:12px 0 10px;color:#50627f;font-size:clamp(1rem,2.2vw,1.18rem)}h1{margin:0;color:#102a5b;font-size:clamp(2.15rem,6.5vw,3.55rem);line-height:1.06;letter-spacing:-.035em}.difficulty{margin:9px 0 28px;font-size:clamp(1.25rem,3vw,1.7rem);font-weight:700}.product-identity{display:grid;justify-items:center;color:#17243a;font-family:Georgia,Times New Roman,serif;font-size:clamp(2.2rem,7vw,4rem);line-height:.92;letter-spacing:0}.product-identity__small{font-family:ui-sans-serif,system-ui,sans-serif;font-size:.25em;font-weight:750;letter-spacing:.12em}.product-identity__el{margin-bottom:.12em}.product-identity__sudoku{position:relative;padding:0 .12em .1em;font-size:1em;font-weight:800;letter-spacing:.08em;text-transform:uppercase}.product-identity__sudoku:after{position:absolute;right:0;bottom:0;left:0;height:.09em;border-radius:70% 25% 65% 30%;background:linear-gradient(90deg,transparent,var(--identity-accent) 8%,var(--identity-accent) 88%,transparent);content:"";transform:rotate(-1deg)}.product-identity__name-row{display:flex;align-items:baseline;justify-content:center;gap:.2em;margin-top:.28em}.product-identity__de{flex:none}.product-identity__name{display:flex;align-items:baseline;min-width:5.15ch;font-size:.56em;font-style:italic;font-weight:700;letter-spacing:.01em}.product-identity__prefixes{display:inline-grid;min-width:2.15ch;text-align:right}.product-identity__prefix{grid-area:1 / 1}.product-identity__prefix--ma{opacity:0}.product-identity .product-identity__prefix--em{animation:identity-prefix-em var(--identity-cycle-duration) ease-in-out var(--identity-iteration-count)}.product-identity .product-identity__prefix--ma{animation:identity-prefix-ma var(--identity-cycle-duration) ease-in-out var(--identity-iteration-count)}@keyframes identity-prefix-em{0%,45%{opacity:1}50%,95%{opacity:0}to{opacity:1}}@keyframes identity-prefix-ma{0%,45%{opacity:0}50%,95%{opacity:1}to{opacity:0}}.identity-splash{display:grid;min-height:calc(100vh - 76px);place-content:center;justify-items:center;gap:clamp(14px,2.5vw,22px);border-radius:12px;cursor:pointer;text-align:center}.identity-splash .product-identity{font-size:clamp(3rem,11vw,5.6rem)}.identity-splash>p{margin:0;color:#50627f;font-size:clamp(1rem,2.7vw,1.2rem)}.identity-splash:focus-visible{outline:3px solid #3177d2;outline-offset:-3px}.identity-splash>.identity-splash__prompt{min-height:48px;padding:14px 18px 8px;color:#344862;font-weight:700;text-decoration:underline;text-underline-offset:4px}.family-moment-image{position:relative;width:100%;aspect-ratio:8 / 5;overflow:hidden;border:1px solid #c9d6e6;border-radius:14px;background:#dce8f6;box-shadow:0 8px 22px #23436c1f}.family-moment-image__fallback{position:absolute;inset:0;background:linear-gradient(145deg,#dce8f6,#eef4fb 48%,#c9dcef)}.family-moment-image__fallback:after{position:absolute;inset:18% 12%;border:1px solid rgb(47 111 179 / 18%);border-radius:50%;content:""}.family-moment-image img{position:absolute;inset:0;display:block;width:100%;height:100%;object-fit:cover}.family-moment-image--splash{width:min(100%,620px)}.family-moment-image--home{width:min(100%,460px);margin-inline:auto}.family-moment-image--difficulty{width:min(100%,540px);aspect-ratio:3 / 1;margin-inline:auto}.family-moment-image--celebration{width:100%;border-radius:12px;box-shadow:none}.family-moment-image--failed img{display:none}.start-screen{display:grid;min-height:min(70vh,620px);align-content:center;gap:clamp(24px,5vw,38px)}.start-actions{display:grid;gap:14px;width:min(100%,460px);margin:0 auto}.start-button{min-height:clamp(68px,12vw,86px);border:1px solid #346cbb;border-radius:12px;background:#fff;color:#102a5b;font-size:clamp(1.25rem,3.8vw,1.65rem);font-weight:750;cursor:pointer}.start-button--primary{background:#edf5ff;box-shadow:inset 0 0 0 1px #c4dcfa}.continue-button{display:grid;place-content:center;gap:7px}.continue-button__context{color:#50627f;font-size:clamp(.88rem,2.3vw,1.02rem);font-weight:650}.secondary-button,.home-button{min-height:44px;border:0;background:transparent;color:#344862;cursor:pointer;font-weight:700;text-decoration:underline;text-underline-offset:3px}.history-entry-button{justify-self:center;margin-top:4px;padding-inline:18px}.difficulty-screen{gap:clamp(26px,6vw,48px)}.start-actions--difficulty{grid-template-columns:repeat(2,minmax(0,1fr));width:min(100%,540px)}.difficulty-button{min-height:clamp(62px,9vw,76px)}.difficulty-button:nth-child(5),.difficulty-back{grid-column:1 / -1}.game-header{display:grid;grid-template-columns:minmax(78px,1fr) minmax(0,3.5fr) minmax(78px,1fr);align-items:start;column-gap:10px;margin-bottom:14px;text-align:center}.game-header__center{min-width:0}.game-header h1{font-size:clamp(1.85rem,5vw,2.6rem)}.game-header__metadata{display:flex;flex-wrap:wrap;justify-content:center;gap:3px 7px;margin:5px 0 0;color:#50627f;font-size:clamp(.92rem,2.5vw,1.14rem);font-weight:700}.game-header__action{width:100%;max-width:96px;min-height:44px}.home-button{justify-self:start;padding:4px;text-align:left}.game-header .pause-button{justify-self:end;padding-inline:8px}.game-meta{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:center;column-gap:8px;margin-bottom:18px;font-size:clamp(1rem,2.5vw,1.28rem);font-weight:650}.game-meta strong{color:#c63e45}.game-meta__time{justify-self:start;min-width:12ch;font-variant-numeric:tabular-nums}.game-meta__errors{justify-self:end;white-space:nowrap}.board{display:grid;grid-template-columns:repeat(9,1fr);aspect-ratio:1;border:3px solid #27364c;border-radius:6px;overflow:hidden;background:#fff}.board-wrap{position:relative;isolation:isolate}.board--notes-mode{border-color:var(--identity-accent);box-shadow:0 0 0 4px #dce9f8,inset 0 0 0 1px #9cbfe7}.board--concealed{visibility:hidden}.cell{display:grid;place-items:center;min-width:0;padding:0;border:0;border-right:1px solid #b6c0cd;border-bottom:1px solid #b6c0cd;background:#fff;color:#102a5b;font-size:clamp(1.45rem,6.2vw,3.3rem);font-weight:700;line-height:1;cursor:pointer}.cell--given{color:#101820}.cell--entry{color:#153f91}.cell--row,.cell--column,.cell--box{background:#f1f6ff}.cell--identical{background:#d8e9ff;color:#0f3f8e}.cell--selected{background:#bcd9ff;outline:3px solid #3177d2;outline-offset:-3px;position:relative;z-index:1}.cell:nth-child(3n){border-right:2px solid #27364c}.cell:nth-child(9n){border-right:0}.cell:nth-child(n+19):nth-child(-n+27),.cell:nth-child(n+46):nth-child(-n+54){border-bottom:2px solid #27364c}.cell--error{background:#ffe8e8;color:#b4232f}.cell--error.cell--selected{outline-color:#c63e45}.cell-notes{display:grid;grid-template-columns:repeat(3,1fr);width:100%;height:100%;padding:6%;align-items:center;color:#486487;font-size:clamp(.46rem,1.8vw,.92rem);font-weight:700}.cell-notes span{display:grid;place-items:center}.number-pad{display:grid;grid-template-columns:repeat(9,1fr);gap:clamp(3px,.8vw,6px);margin:24px 0 18px}.number-key,.control{min-height:clamp(54px,10vw,74px);border:1px solid #bcc7d6;border-radius:10px;background:#fff;color:#102a5b;font-weight:720;cursor:pointer}.number-key{display:grid;place-content:center;gap:2px;padding:4px}.number-key__digit{font-size:clamp(1.85rem,5.3vw,3rem);line-height:.9}.number-key__count{color:#5e6e86;font-size:clamp(.72rem,1.7vw,.92rem);line-height:1}.number-key:disabled,.control:disabled{opacity:.45;cursor:not-allowed}.number-key--complete:disabled{opacity:1;border-color:#d7dde5;background:#f2f4f7;cursor:default}.game-controls{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(8px,1.6vw,12px)}.control{padding:8px 6px;font-size:clamp(.85rem,2.7vw,1.15rem)}.control--accent{border-color:#346cbb;background:#edf5ff}.control__count{display:block;font-size:.78em}.control--notes{white-space:nowrap}.control--notes__label{display:inline-block;min-width:9ch}.control--active{border-color:#2a68b8;background:#ddebff;box-shadow:inset 0 0 0 1px #2a68b8}.error-limit{margin:-6px 0 14px;color:#a8232d;font-weight:700;text-align:center}.pause-button,.resume-button{border:1px solid #346cbb;border-radius:8px;background:#edf5ff;color:#102a5b;cursor:pointer;font-weight:700;padding:7px 12px}.pause-overlay{position:absolute;z-index:2;inset:0;display:grid;place-content:center;gap:12px;border-radius:6px;background:#edf5ff;color:#102a5b;font-size:clamp(1.25rem,4vw,1.8rem);font-weight:750;text-align:center}.pause-overlay p{margin:0}.resume-button{margin:0 auto;font-size:.8em}.game-result{margin:24px 0 18px;padding:clamp(22px,5vw,38px) clamp(18px,5vw,34px);border:1px solid #cbd8ea;border-radius:14px;background:#f5f9ff;text-align:center}.game-result h2{margin:0 0 12px;color:#102a5b;font-size:clamp(1.75rem,5vw,2.45rem)}.game-result h2:focus-visible{outline:3px solid #3177d2;outline-offset:5px;border-radius:4px}.game-result__content{margin-top:22px}.game-result--failed .game-result__content{margin-top:0}.game-result__completion-copy{margin:0 0 22px;color:#50627f;font-size:clamp(1.05rem,3vw,1.3rem);font-weight:700}.game-result__identity{margin:0;color:#102a5b;font-size:clamp(1.35rem,3.8vw,1.7rem);font-weight:800}.game-result__difficulty{margin:4px 0 24px;color:#50627f;font-size:clamp(1.05rem,3vw,1.3rem);font-weight:700}.game-result__message{margin:0 0 28px;color:#50627f;font-size:clamp(1.05rem,3vw,1.3rem)}.game-result__summary{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:0 0 28px}.game-result__summary div{padding:12px 6px;border-radius:8px;background:#fff}.game-result__summary dt{color:#5e6e86;font-size:.86rem}.game-result__summary dd{margin:4px 0 0;color:#102a5b;font-size:1.18rem;font-weight:750;font-variant-numeric:tabular-nums}.result-button{min-height:56px;padding:10px 24px;border:1px solid #346cbb;border-radius:10px;background:#edf5ff;color:#102a5b;font-size:1.1rem;font-weight:750;cursor:pointer}.game-result--completed .family-moment-image img{animation:family-image-reveal .62s cubic-bezier(.2,.7,.25,1) both}.game-result--completed .game-result__content{animation:family-content-reveal .56s ease-out both}@keyframes family-image-reveal{0%{opacity:0;transform:scale(1.025)}to{opacity:1;transform:scale(1)}}@keyframes family-content-reveal{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.result-home-button{display:block;margin:14px auto 0}.restart-button{display:block;width:fit-content;min-height:44px;margin:18px auto 0;padding:8px 14px;border:1px solid #aebdcc;border-radius:8px;background:#fff;color:#344862;cursor:pointer;font-size:clamp(.9rem,2.5vw,1.05rem);font-weight:650}.history-screen{color:#102a5b}.history-header{display:grid;grid-template-columns:minmax(72px,1fr) minmax(0,4fr) minmax(72px,1fr);align-items:start;margin-bottom:clamp(24px,5vw,38px);text-align:center}.history-header:after{content:""}.history-header__back{padding:4px}.history-header h1{font-size:clamp(2rem,5.8vw,3rem)}.history-header p{margin:8px 0 0;color:#50627f;font-size:clamp(.95rem,2.4vw,1.12rem)}.history-empty{padding:clamp(34px,8vw,58px) 18px;border:1px solid #d2dceb;border-radius:14px;background:#f7faff;text-align:center}.history-empty p{margin:0 0 8px;color:#50627f;font-size:clamp(1.05rem,2.8vw,1.25rem)}.history-empty .result-button{margin-top:22px}.history-summary,.history-recent{margin-top:28px}.history-summary h2,.history-recent h2{margin:0 0 14px;font-size:clamp(1.35rem,3.5vw,1.75rem)}.history-summary__total{margin:0 0 16px;color:#50627f;font-size:1.05rem}.history-summary__total strong{color:#102a5b;font-size:1.35rem}.history-levels{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:8px;margin:0}.history-levels div{min-width:0;padding:11px 5px;border:1px solid #d7e0ec;border-radius:9px;background:#f7faff;text-align:center}.history-levels dt{color:#50627f;font-size:clamp(.74rem,1.8vw,.9rem);font-weight:650}.history-levels dd{margin:5px 0 0;font-size:1.2rem;font-weight:800;font-variant-numeric:tabular-nums}.history-list{display:grid;gap:13px;margin:0;padding:0;list-style:none}.history-card{padding:clamp(16px,3vw,22px);border:1px solid #cbd8ea;border-radius:12px;background:#fbfdff}.history-card>header{display:flex;align-items:baseline;justify-content:space-between;gap:12px}.history-card h3,.history-card header p{margin:0}.history-card h3{font-size:clamp(1.15rem,3vw,1.38rem)}.history-card header p{color:#50627f;font-weight:700}.history-card dl{display:grid;grid-template-columns:2fr repeat(3,1fr);gap:8px;margin:16px 0 0}.history-card dl div{min-width:0}.history-card dt{color:#5e6e86;font-size:.78rem}.history-card dd{margin:3px 0 0;font-size:clamp(.88rem,2vw,1rem);font-weight:700;font-variant-numeric:tabular-nums}.history-card__best{margin:14px 0 0;color:#344862;font-size:.9rem;font-weight:700}.update-notice{display:flex;align-items:center;justify-content:center;gap:12px;width:min(100%,460px);margin:-8px auto 0;padding:12px 14px;border:1px solid #c4d8ef;border-radius:10px;background:#f3f8fe;color:#344862}.update-notice p{margin:0}.update-notice button,.secondary-action-button{min-height:44px;padding:9px 14px;border:1px solid #346cbb;border-radius:8px;background:#fff;color:#102a5b;cursor:pointer;font-weight:700}.data-transfer{margin-top:34px;padding:clamp(18px,4vw,26px);border:1px solid #d2dceb;border-radius:12px;background:#f8fbff}.data-transfer h2{margin:0 0 8px;font-size:clamp(1.2rem,3vw,1.45rem)}.data-transfer>p{margin:0;color:#50627f;line-height:1.5}.data-transfer__actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.data-transfer__import{display:inline-grid;place-items:center}.data-transfer__import input{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.data-transfer__import:focus-within{outline:3px solid #3177d2;outline-offset:2px}.data-transfer__status{margin-top:14px!important;font-weight:700}.data-transfer__status--success{color:#245b3b!important}.data-transfer__status--error{color:#a8232d!important}.data-transfer__status--info{color:#344862!important}@media(max-width:420px){.app-shell{padding-inline:12px}.welcome,.game-meta{font-size:.92rem}.start-actions--difficulty{grid-template-columns:1fr;gap:10px}.difficulty-button{min-height:58px}.difficulty-button:nth-child(5),.difficulty-back{grid-column:auto}.game-header{grid-template-columns:minmax(68px,1fr) minmax(0,2fr) minmax(68px,1fr);column-gap:5px}.game-header h1{font-size:1.65rem}.game-header__metadata{gap:1px 5px;font-size:.82rem}.game-header__action{font-size:.88rem}.game-meta__time{min-width:0}.game-controls{gap:6px}.number-pad{grid-template-columns:repeat(3,1fr);gap:6px}.number-key{min-height:60px}}@media(max-width:520px){.history-header{grid-template-columns:66px minmax(0,1fr) 66px}.history-levels{grid-template-columns:repeat(2,1fr)}.history-levels div:last-child{grid-column:1 / -1}.history-card dl{grid-template-columns:repeat(2,1fr)}}@media(prefers-reduced-motion:reduce){.product-identity .product-identity__prefix{animation:none}.product-identity .product-identity__prefix--em{opacity:1}.product-identity .product-identity__prefix--ma{opacity:0}.game-result--completed .family-moment-image img,.game-result--completed .game-result__content{animation:none;opacity:1;transform:none}}