:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;--primary:#005db6;--on-primary:#fff;--primary-container:#d6e3ff;--on-primary-container:#00468b;--secondary:#555f71;--on-secondary:#fff;--secondary-container:#d9e3f9;--on-secondary-container:#3e4758;--tertiary:#855318;--on-tertiary:#fff;--tertiary-container:#ffdcbe;--on-tertiary-container:#693c00;--error:#ba1a1a;--on-error:#fff;--surface:#fff;--on-surface:#1b1b1b;--on-surface-variant:#474747;--surface-container-lowest:#fff;--surface-container-low:#f3f3f3;--surface-container:#eee;--surface-container-high:#e8e8e8;--surface-container-highest:#e2e2e2;--outline:#777;--outline-variant:#c6c6c6;--inverse-surface:#303030;--on-inverse-surface:#f1f1f1;--board-background:#fff;--board-thin-line:#c6c6c6;--board-thick-line:#1b1b1b;--board-given:#1b1b1b;--board-entry:#005db6;--board-mistake:#ba1a1a;--board-note:#474747;--board-selected:#d6e3ff;--board-related:#e2e2e2;--board-same-digit:#d9e3f9;--board-hint-area:#ffdcbe99;--board-hint-target:#85531859;--board-cage:#474747}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial}:root:not([data-theme=light]){--primary:#a9c7ff;--on-primary:#003063;--primary-container:#00468b;--on-primary-container:#d6e3ff;--secondary:#bdc7dc;--on-secondary:#273141;--secondary-container:#3e4758;--on-secondary-container:#d9e3f9;--tertiary:#fcb975;--on-tertiary:#4a2800;--tertiary-container:#693c00;--on-tertiary-container:#ffdcbe;--error:#ffb4ab;--on-error:#690005;--surface:#131313;--on-surface:#e2e2e2;--on-surface-variant:#c6c6c6;--surface-container-lowest:#0e0e0e;--surface-container-low:#1b1b1b;--surface-container:#1f1f1f;--surface-container-high:#2a2a2a;--surface-container-highest:#353535;--outline:#919191;--outline-variant:#474747;--inverse-surface:#e2e2e2;--on-inverse-surface:#303030;--board-background:#131313;--board-thin-line:#474747;--board-thick-line:#e2e2e2;--board-given:#e2e2e2;--board-entry:#a9c7ff;--board-mistake:#ffb4ab;--board-note:#c6c6c6;--board-selected:#00468b;--board-related:#353535;--board-same-digit:#3e4758;--board-hint-area:#693c0099;--board-hint-target:#fcb97559;--board-cage:#c6c6c6}}:root[data-theme=light]{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}:root[data-theme=dark]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--primary:#a9c7ff;--on-primary:#003063;--primary-container:#00468b;--on-primary-container:#d6e3ff;--secondary:#bdc7dc;--on-secondary:#273141;--secondary-container:#3e4758;--on-secondary-container:#d9e3f9;--tertiary:#fcb975;--on-tertiary:#4a2800;--tertiary-container:#693c00;--on-tertiary-container:#ffdcbe;--error:#ffb4ab;--on-error:#690005;--surface:#131313;--on-surface:#e2e2e2;--on-surface-variant:#c6c6c6;--surface-container-lowest:#0e0e0e;--surface-container-low:#1b1b1b;--surface-container:#1f1f1f;--surface-container-high:#2a2a2a;--surface-container-highest:#353535;--outline:#919191;--outline-variant:#474747;--inverse-surface:#e2e2e2;--on-inverse-surface:#303030;--board-background:#131313;--board-thin-line:#474747;--board-thick-line:#e2e2e2;--board-given:#e2e2e2;--board-entry:#a9c7ff;--board-mistake:#ffb4ab;--board-note:#c6c6c6;--board-selected:#00468b;--board-related:#353535;--board-same-digit:#3e4758;--board-hint-area:#693c0099;--board-hint-target:#fcb97559;--board-cage:#c6c6c6}
:root{--radius-card:12px;--radius-large:20px;--radius-pill:999px;--page-max:1080px;--gutter:16px;--font:system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{background:var(--surface);color:var(--on-surface);font-family:var(--font);-webkit-font-smoothing:antialiased;margin:0;font-size:1rem;line-height:1.55}a{color:var(--primary)}h1,h2,h3{text-wrap:balance;margin:0 0 .5em;line-height:1.2}h1{letter-spacing:-.02em;font-size:clamp(2rem,5vw,3rem);font-weight:700}h2{font-size:clamp(1.4rem,3vw,1.75rem);font-weight:650}h3{font-size:1.05rem;font-weight:600}p{margin:0 0 1em}:focus-visible{outline:3px solid var(--primary);outline-offset:2px}.skip-link{inset-inline-start:var(--gutter);border-radius:var(--radius-pill);background:var(--primary);color:var(--on-primary);z-index:10;padding:8px 16px;position:absolute;top:-100px}.skip-link:focus{top:8px}.container{width:100%;max-width:var(--page-max);padding-inline:var(--gutter);margin-inline:auto}.site-header{z-index:5;background:color-mix(in srgb, var(--surface) 88%, transparent);-webkit-backdrop-filter:saturate(1.4)blur(12px);backdrop-filter:saturate(1.4)blur(12px);border-bottom:1px solid var(--outline-variant);position:sticky;top:0}.site-header .container{justify-content:space-between;align-items:center;gap:16px;min-height:60px;display:flex}.brand{color:var(--on-surface);align-items:center;gap:10px;font-size:1.15rem;font-weight:700;text-decoration:none;display:inline-flex}.brand svg{flex:none}.site-nav{align-items:center;gap:4px;display:flex}.site-nav a{border-radius:var(--radius-pill);color:var(--on-surface-variant);padding:8px 12px;font-weight:500;text-decoration:none}.site-nav a:hover{background:var(--surface-container-high);color:var(--on-surface)}.site-nav a.cta{background:var(--primary);color:var(--on-primary)}@media (max-width:520px){.site-nav a:not(.cta){display:none}}main{padding-block:32px 64px;display:block}section{margin-block:56px}[id]{scroll-margin-top:76px}.lead{color:var(--on-surface-variant);max-width:62ch;font-size:1.15rem}.home-page{max-width:1320px;padding-inline:24px}body:has(.home-page) .site-header .container{max-width:1320px;padding-inline:24px}.hero{grid-template-columns:1fr 1.05fr;align-items:center;gap:36px;min-height:clamp(550px,40vw,635px);margin-block:28px 80px;display:grid}.hero-copy{z-index:1;position:relative}.hero h1{letter-spacing:-.055em;margin-bottom:28px;font-size:clamp(3.25rem,5.6vw,5.25rem);font-weight:750;line-height:1.06}.hero h1 span{color:var(--primary);display:block}.hero .lead{max-width:48ch;margin-bottom:32px;font-size:1.1rem;line-height:1.75}.hero-actions{flex-wrap:wrap;align-items:center;gap:12px 24px;display:flex}.hero-primary,.hero-secondary{border-radius:var(--radius-pill);justify-content:center;align-items:center;gap:12px;min-height:52px;font-size:.95rem;font-weight:600;text-decoration:none;transition:background .18s,transform .18s;display:inline-flex}.hero-primary{background:var(--primary);color:var(--on-primary);padding:14px 24px}.hero-primary:hover{background:color-mix(in srgb, var(--primary) 88%, var(--on-surface));transform:translateY(-2px)}.hero-secondary{padding-block:12px}.hero-secondary:hover{text-underline-offset:5px;text-decoration:underline}.puzzle-showcase{aspect-ratio:1.06;isolation:isolate;justify-self:center;width:100%;max-width:620px;position:relative}.puzzle-showcase:before{content:"";background:color-mix(in srgb, var(--primary-container) 53%, var(--surface));z-index:-1;border-radius:50%;position:absolute;inset:3% -1% 1% 3%}.preview-card{border:1px solid color-mix(in srgb, var(--outline-variant) 45%, transparent);background:var(--surface-container-lowest);color:var(--on-surface);border-radius:18px;padding:18px;text-decoration:none;transition:transform .24s,box-shadow .24s;display:block;position:absolute;box-shadow:0 18px 38px -16px #10122040,0 4px 10px #1012200d}.preview-title{letter-spacing:-.025em;white-space:nowrap;align-items:center;gap:9px;margin-bottom:16px;font-size:.95rem;font-weight:650;display:flex}.preview-title svg{width:21px;height:21px;color:var(--primary);flex:none}.preview-board{width:100%;height:auto;display:block;overflow:visible}.preview-sudoku{inset-inline-start:1%;z-index:1;width:59%;top:17%;transform:rotate(-7deg)}.preview-nonogram{inset-inline-end:0;z-index:2;width:37%;top:1%;transform:rotate(7deg)}.preview-starbattle{inset-inline-end:0;background:color-mix(in srgb, var(--tertiary-container) 24%, var(--surface-container-lowest));z-index:3;width:37%;bottom:0;transform:rotate(7deg)}.preview-card:hover,.preview-card:focus-visible{box-shadow:0 24px 44px -14px color-mix(in srgb, var(--primary) 30%, transparent);z-index:4;transform:translateY(-7px)rotate(0)}.catalog-intro{text-align:center;margin-bottom:40px}.catalog-intro h2{letter-spacing:-.04em;font-size:clamp(1.8rem,3vw,2.25rem)}.catalog-intro .lead{margin-inline:auto;font-size:1.05rem}@media (max-width:1050px) and (min-width:860px){.hero{gap:24px}.hero h1{font-size:3.25rem}.preview-card{padding:12px}.preview-title{gap:6px;margin-bottom:12px;font-size:.8rem}.preview-title svg{width:18px;height:18px}}@media (max-width:859px){.hero{grid-template-columns:1fr;gap:44px;min-height:auto;margin-block:16px 64px}.hero-copy{max-width:600px}.hero h1{margin-bottom:22px;font-size:clamp(2.8rem,8.5vw,4rem)}.hero .lead{max-width:55ch;margin-bottom:24px;font-size:1rem;line-height:1.7}.puzzle-showcase{width:94%;max-width:480px}}@media (max-width:480px){.home-page{padding-inline:20px}body:has(.home-page) .site-header .container{padding-inline:20px}.hero-actions{gap:8px 18px}.hero-primary,.hero-secondary{gap:8px;font-size:.85rem}.hero-primary{padding-inline:18px}.preview-card{border-radius:13px;padding:11px}.preview-title{gap:5px;margin-bottom:10px;font-size:.67rem}.preview-title svg{width:15px;height:15px}.catalog-intro{margin-bottom:28px}}@media (prefers-reduced-motion:reduce){.preview-card,.hero-primary,.hero-secondary{transition:none}}.card{background:var(--surface-container-low);border:1px solid var(--outline-variant);border-radius:var(--radius-card);padding:16px}.family{margin-top:28px}.family h3{color:var(--on-surface-variant);letter-spacing:.06em;text-transform:uppercase;margin-bottom:12px;font-size:.85rem}.puzzle-grid{grid-template-columns:repeat(auto-fill,minmax(min(100%,240px),1fr));gap:12px;margin:0;padding:0;list-style:none;display:grid}.puzzle-card{align-items:flex-start;gap:14px;height:100%;display:flex}.puzzle-card .icon{background:var(--primary-container);width:44px;height:44px;color:var(--on-primary-container);border-radius:12px;flex:none;place-items:center;display:grid}.puzzle-card h4{margin:2px 0 4px;font-size:1rem}.puzzle-card p{color:var(--on-surface-variant);margin:0;font-size:.9rem}.feature-grid{grid-template-columns:repeat(auto-fit,minmax(min(100%,230px),1fr));gap:12px;display:grid}.feature-grid .card h3{margin-bottom:6px}.feature-grid .card p{color:var(--on-surface-variant);margin:0;font-size:.95rem}.panel{background:var(--primary-container);color:var(--on-primary-container);border-radius:var(--radius-large);padding:clamp(20px,4vw,36px)}.panel p{max-width:62ch}.badges{flex-wrap:wrap;gap:10px;margin-top:8px;display:flex}.badge{border-radius:var(--radius-pill);background:var(--on-primary-container);color:var(--primary-container);align-items:center;gap:8px;padding:10px 18px;font-weight:600;text-decoration:none;display:inline-flex}.badge[aria-disabled=true]{opacity:.75}.badge small{opacity:.85;font-weight:500}.faq details{border-bottom:1px solid var(--outline-variant);padding-block:14px}.faq summary{cursor:pointer;font-weight:600}.faq details p{color:var(--on-surface-variant);margin:10px 0 0}.prose{max-width:70ch}.prose h2{margin-top:1.8em;font-size:1.3rem}.prose ul{padding-inline-start:1.2em}.prose .meta{color:var(--on-surface-variant);font-size:.9rem}.site-footer{border-top:1px solid var(--outline-variant);background:var(--surface-container-low);color:var(--on-surface-variant);padding-block:32px;font-size:.92rem}.site-footer .container{flex-wrap:wrap;justify-content:space-between;gap:16px 32px;display:flex}.site-footer nav{flex-wrap:wrap;gap:8px 20px;display:flex}.site-footer a{color:var(--on-surface-variant)}a.puzzle-card{color:inherit;text-decoration:none;transition:background-color .15s,border-color .15s}a.puzzle-card:hover{background:var(--surface-container);border-color:var(--outline)}.play-badge{border-radius:var(--radius-pill);background:var(--primary);color:var(--on-primary);vertical-align:2px;margin-inline-start:8px;padding:2px 8px;font-size:.72rem;font-weight:600}.puzzle-page h1{margin-top:4px}.crumbs{color:var(--on-surface-variant);font-size:.9rem}.crumbs a{color:var(--on-surface-variant)}.level-tabs{flex-wrap:wrap;gap:6px;margin:20px 0 12px;display:flex}.level-tabs a{border-radius:var(--radius-pill);border:1px solid var(--outline-variant);color:var(--on-surface);padding:8px 16px;font-weight:500;text-decoration:none}.level-tabs a.current{background:var(--secondary-container);color:var(--on-secondary-container);border-color:#0000}.techniques{gap:10px;margin:0;display:grid}.techniques div{border-radius:var(--radius-card);background:var(--surface-container-low);border:1px solid var(--outline-variant);padding:12px 16px}.techniques dt{font-weight:600}.techniques dd{color:var(--on-surface-variant);margin:4px 0 0}.technique-level{margin-top:20px}.technique-level h3 a{color:var(--on-surface)}.play{-webkit-user-select:none;user-select:none;max-width:560px;margin-inline:auto}.play-bar{align-items:center;gap:12px;min-height:48px;display:flex}.play-mistakes,.play-rule{color:var(--on-surface-variant);font-size:.9rem}.play-clock{font-variant-numeric:tabular-nums;margin-inline-start:auto;font-weight:600}.play-bar-actions{display:flex}.icon-button{border-radius:var(--radius-pill);width:40px;height:40px;color:var(--on-surface-variant);cursor:pointer;background:0 0;border:0;place-items:center;display:grid}.icon-button:hover{background:var(--surface-container-high)}.play-board{position:relative}.board{touch-action:none;cursor:pointer;border-radius:6px;width:100%;height:auto;display:block}.board:focus{outline:none}.board:focus-visible{outline:3px solid var(--primary);outline-offset:3px}.board-cursor{fill:none;stroke:#0000;stroke-width:6px}.board:focus-visible .board-cursor{stroke:var(--primary)}.play-cover{background:var(--surface-container-high);border-radius:6px;place-items:center;display:grid;position:absolute;inset:0}.button{border-radius:var(--radius-pill);min-height:40px;font:inherit;cursor:pointer;border:0;justify-content:center;align-items:center;gap:6px;padding:0 20px;font-weight:600;text-decoration:none;display:inline-flex}.button svg{width:20px;height:20px}.button.filled{background:var(--primary);color:var(--on-primary)}.button.tonal{background:var(--secondary-container);color:var(--on-secondary-container)}.button.text{color:var(--primary);background:0 0}.tool-row{justify-content:space-around;min-height:72px;margin-top:12px;display:flex}.tool{border-radius:var(--radius-card);min-width:64px;color:var(--on-surface-variant);font:inherit;cursor:pointer;background:0 0;border:0;flex-direction:column;align-items:center;gap:4px;padding:8px 6px;font-size:.8rem;display:flex}.tool:hover:not(:disabled){background:var(--surface-container-high)}.tool.active{background:var(--secondary-container);color:var(--on-secondary-container)}.tool:disabled{opacity:.4;cursor:default}.segmented{border:1px solid var(--outline);border-radius:999px;max-width:320px;margin:8px auto 0;display:flex;overflow:hidden}.segmented button{min-height:44px;color:var(--on-surface);font:inherit;cursor:pointer;background:0 0;border:0;flex:1;justify-content:center;align-items:center;gap:8px;font-weight:500;display:flex}.segmented button+button{border-left:1px solid var(--outline)}.segmented button.selected{background:var(--secondary-container);color:var(--on-secondary-container)}.segmented svg{width:18px;height:18px}.number-pad{grid-template-columns:repeat(9,1fr);gap:6px;margin-top:8px;display:grid}.number-pad button{aspect-ratio:1/1.15;border-radius:var(--radius-card);background:var(--surface-container-high);color:var(--primary);font:inherit;cursor:pointer;border:0;font-size:clamp(1.1rem,4vw,1.6rem);font-weight:500}.number-pad button:disabled{opacity:.3;cursor:default}.hint-card,.play-result{border-radius:var(--radius-large);background:var(--surface-container-high);margin-top:12px;padding:16px}.hint-card h3{margin-bottom:4px}.hint-card p{color:var(--on-surface-variant);margin:0 0 8px}.hint-actions,.play-result-actions{flex-wrap:wrap;justify-content:flex-end;gap:8px;display:flex}.play-result{text-align:center}.play-result-actions{justify-content:center}.play-pitch{color:var(--on-surface-variant);margin:12px 0 0;font-size:.9rem}dialog.confirm{border-radius:var(--radius-large);background:var(--surface-container-high);max-width:min(90vw,360px);color:var(--on-surface);border:0;padding:20px}dialog.confirm::backdrop{background:#0006}