.region-grid-page{overflow-x:clip;background:var(--color-canvas)}.region-grid-content-wrapper{max-width:1180px}.region-grid-landing-shell{position:relative;background:radial-gradient(circle at 82% 16%,color-mix(in srgb,var(--pillar-puzzles-card) 58%,transparent),transparent 28rem),radial-gradient(circle at 8% 72%,color-mix(in srgb,var(--color-brand-soft) 58%,transparent),transparent 24rem),var(--color-canvas)}.region-grid-hero{display:grid;align-items:start;gap:clamp(2rem,6vw,5rem);padding-block:clamp(2.5rem,5vw,4rem)}.region-grid-hero-copy{max-width:650px}.region-grid-hero-title{max-width:13ch;margin-top:1.25rem;color:var(--color-on-surface);font-family:var(--font-headline);font-size:clamp(2.75rem,5.2vw,3.55rem);font-weight:900;letter-spacing:-.045em;line-height:1.06}.region-grid-hero-title-highlight{position:relative;z-index:0;white-space:nowrap}.region-grid-hero-title-highlight:after{position:absolute;z-index:-1;right:-.06em;bottom:.05em;left:-.06em;height:.22em;border-radius:999px;background:color-mix(in srgb,var(--color-brand) 32%,transparent);content:"";transform:rotate(-1deg)}.region-grid-hero-actions,.region-grid-capabilities{display:flex;flex-wrap:wrap;gap:.75rem}.region-grid-capabilities{margin-top:1.25rem}.region-grid-capability{display:inline-flex;min-height:40px;align-items:center;gap:.5rem;border:1px solid color-mix(in srgb,var(--pillar-puzzles-border) 65%,transparent);border-radius:var(--radius-pill);background:color-mix(in srgb,var(--color-surface) 88%,transparent);padding:.55rem .85rem;color:var(--color-on-surface-variant);box-shadow:var(--shadow-xs);font-size:.78rem;font-weight:800}.region-grid-capability .material-symbols-outlined{color:var(--pillar-puzzles-dark);font-size:1.05rem}.region-grid-hero-preview{position:relative;width:min(100%,500px);justify-self:center;padding:clamp(1rem,3vw,1.65rem)}.region-grid-hero-board-card{position:relative;z-index:1;border:1px solid color-mix(in srgb,var(--pillar-puzzles-border) 62%,transparent);border-radius:28px;background:color-mix(in srgb,var(--color-surface) 94%,var(--pillar-puzzles-soft));padding:clamp(1rem,3vw,1.5rem);box-shadow:0 24px 56px color-mix(in srgb,var(--pillar-puzzles-dark) 12%,transparent);transform:rotate(1deg)}.region-grid-hero-board-meta{display:flex;align-items:center;justify-content:space-between;gap:1rem;margin-bottom:.85rem}.region-grid-hero-board-meta strong{color:var(--color-on-surface);font-family:var(--font-headline);font-size:.9rem}.region-grid-hero-pencil{position:absolute;z-index:2;right:-4.75rem;bottom:-3rem;width:clamp(7rem,13vw,10.5rem);height:auto;pointer-events:none;filter:drop-shadow(0 16px 18px color-mix(in srgb,var(--color-ink) 14%,transparent));transform:rotate(4deg)}.region-grid-mini-board{display:grid;grid-template-columns:repeat(var(--mini-grid-size),minmax(0,1fr));gap:2px;border:1px solid color-mix(in srgb,var(--pillar-puzzles-dark) 18%,transparent);border-radius:18px;background:color-mix(in srgb,var(--pillar-puzzles-dark) 12%,var(--color-surface));padding:6px}.region-grid-mini-cell{position:relative;display:grid;aspect-ratio:1;min-width:0;place-items:center;border-radius:5px;color:var(--pillar-puzzles-dark)}.region-grid-mini-cell[data-highlighted=true]{box-shadow:inset 0 0 0 2px color-mix(in srgb,var(--pillar-puzzles) 54%,transparent)}.region-grid-mini-cell[data-selected=true]{z-index:1;box-shadow:inset 0 0 0 3px var(--pillar-puzzles),0 0 0 2px var(--color-surface)}.region-grid-mini-marker{color:var(--pillar-puzzles);font-size:clamp(.8rem,4.2vw,1.55rem);filter:drop-shadow(0 2px 2px color-mix(in srgb,var(--pillar-puzzles-dark) 18%,transparent))}.region-grid-mini-note{color:var(--color-error);font-size:clamp(.8rem,4vw,1.4rem);font-weight:900;line-height:1}.region-grid-mini-board--lesson,.region-grid-mini-board--rule{width:min(100%,190px);margin-inline:auto}.region-grid-mini-board--difficulty{width:min(100%,180px);margin-inline:auto;border-radius:13px;padding:4px}.region-grid-mini-board--difficulty .region-grid-mini-cell{border-radius:3px}.region-grid-mini-board--paper{width:100%;border-radius:10px;padding:4px}.region-grid-game-section{scroll-margin-top:5.5rem;padding-block:1rem 2rem}.region-grid-section-heading{max-width:720px;margin-inline:auto;text-align:center}.region-grid-section-heading h2{margin-top:.75rem;color:var(--color-on-surface);font-family:var(--font-headline);font-size:clamp(2rem,4vw,2.55rem);font-weight:900;letter-spacing:-.035em;line-height:1.12}.region-grid-section-heading p:last-child{margin-top:.85rem;color:var(--color-on-surface-variant);font-size:clamp(.95rem,1.6vw,1.08rem);line-height:1.65}.region-grid-game-frame{margin-top:clamp(1.75rem,4vw,2.5rem)}.region-grid-app-shell{overflow:hidden;border:1px solid color-mix(in srgb,var(--pillar-puzzles-border) 76%,var(--color-hairline));border-radius:26px;background:var(--color-surface);box-shadow:0 18px 48px color-mix(in srgb,var(--pillar-puzzles-dark) 10%,transparent)}.region-grid-app-statusbar{display:grid;grid-template-columns:minmax(11rem,1fr) minmax(24rem,1.4fr);align-items:center;gap:1.25rem;border-bottom:1px solid var(--color-hairline);padding:1rem 1.25rem;background:color-mix(in srgb,var(--pillar-puzzles-soft) 45%,var(--color-surface))}.region-grid-app-level strong{display:block;color:var(--color-on-surface);font-family:var(--font-headline);font-size:1.08rem;font-weight:900}.region-grid-app-level span{display:block;margin-top:.2rem;color:var(--color-on-surface-muted);font-size:.78rem;font-weight:700}.region-grid-app-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));overflow:hidden;border:1px solid var(--color-hairline);border-radius:15px;background:var(--color-surface)}.region-grid-app-stat{min-width:0;padding:.6rem .45rem;text-align:center}.region-grid-app-stat+.region-grid-app-stat{border-left:1px solid var(--color-hairline)}.region-grid-app-stat-label{display:block;color:var(--color-on-surface-muted);font-size:.62rem;font-weight:900;letter-spacing:.07em;line-height:1.2;text-transform:uppercase}.region-grid-app-stat-value{display:block;overflow:hidden;margin-top:.25rem;color:var(--color-on-surface);font-family:var(--font-headline);font-size:1.05rem;font-weight:900;line-height:1.15;text-overflow:ellipsis;white-space:nowrap}.region-grid-app-stat[data-tone=puzzle] .region-grid-app-stat-value{color:var(--pillar-puzzles-dark)}.region-grid-app-stat[data-tone=error] .region-grid-app-stat-value{color:var(--color-error)}.region-grid-quick-guide{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:.6rem;border-bottom:1px solid var(--color-hairline-soft);padding:.75rem 1.25rem;background:var(--color-surface)}.region-grid-quick-step{display:inline-flex;min-height:34px;align-items:center;gap:.45rem;border-radius:var(--radius-pill);background:var(--pillar-puzzles-soft);padding:.4rem .7rem;color:var(--pillar-puzzles-dark);font-size:.75rem;font-weight:800}.region-grid-quick-step-index{display:grid;width:1.3rem;height:1.3rem;place-items:center;border-radius:50%;background:var(--pillar-puzzles);color:var(--color-on-brand);font-size:.68rem}.region-grid-app-body{display:grid;grid-template-columns:minmax(0,1fr) minmax(18rem,21rem);align-items:start;gap:clamp(1rem,2.5vw,1.75rem);padding:clamp(1rem,2.8vw,1.75rem)}.region-grid-board-column{min-width:0}.region-grid-board-frame{position:relative;max-width:680px;margin-inline:auto;border:1px solid var(--color-hairline);border-radius:22px;background:color-mix(in srgb,var(--pillar-puzzles-soft) 38%,var(--color-surface));padding:clamp(.65rem,1.5vw,1rem)}.region-grid-board-frame .ui-game-board{gap:clamp(1px,.35vw,3px);padding:clamp(.35rem,1.2vw,.7rem)}.region-grid-board-support{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.65rem;max-width:680px;margin:.75rem auto 0;color:var(--color-on-surface-variant);font-size:.78rem;font-weight:750}.region-grid-game-toolbar{max-width:680px;margin:.9rem auto 0}.region-grid-game-toolbar .ui-panel{border-radius:18px;box-shadow:none}.region-grid-sidebar{display:grid;gap:.8rem}.region-grid-sidebar-card,.region-grid-disclosure{border:1px solid var(--color-hairline);border-radius:18px;background:var(--color-surface);box-shadow:var(--shadow-xs)}.region-grid-sidebar-card{padding:1rem}.region-grid-sidebar-card h3,.region-grid-disclosure>summary strong{color:var(--color-on-surface);font-size:.75rem;font-weight:900;letter-spacing:.06em;text-transform:uppercase}.region-grid-level-summary{display:grid;grid-template-columns:1fr auto;align-items:center;gap:1rem}.region-grid-level-summary p{margin-top:.3rem;color:var(--color-on-surface-variant);font-size:.8rem;font-weight:700}.region-grid-progress-track{overflow:hidden;height:.5rem;margin-top:.8rem;border-radius:999px;background:var(--pillar-puzzles-soft)}.region-grid-progress-fill{height:100%;border-radius:inherit;background:var(--pillar-puzzles);transition:width .18s ease}.region-grid-sidebar-rules .ui-panel{border:0;border-radius:0;box-shadow:none}.region-grid-disclosure>summary{display:flex;min-height:50px;cursor:pointer;list-style:none;align-items:center;justify-content:space-between;gap:1rem;padding:.8rem 1rem}.region-grid-disclosure>summary::-webkit-details-marker{display:none}.region-grid-disclosure>summary:after{color:var(--pillar-puzzles-dark);content:"";font-family:Material Symbols Outlined;font-size:1.25rem;transition:transform .18s ease}.region-grid-disclosure[open]>summary:after{transform:rotate(180deg)}.region-grid-disclosure-content{border-top:1px solid var(--color-hairline-soft);padding:.75rem}.region-grid-disclosure-content>.ui-panel{border:0;border-radius:12px;box-shadow:none}.region-grid-learning-zone{border-block:1px solid color-mix(in srgb,var(--color-hairline) 65%,transparent);background:var(--color-surface)}.region-grid-learning-section{padding-block:2.5rem}.region-grid-extension-section{padding-block:2.75rem}.region-grid-steps,.region-grid-rules,.region-grid-difficulties{display:grid;gap:1rem;margin-top:2rem}.region-grid-steps,.region-grid-rules,.region-grid-difficulties{grid-template-columns:repeat(4,minmax(0,1fr))}.region-grid-step-card,.region-grid-rule-card,.region-grid-difficulty-card{min-width:0;border:1px solid var(--color-hairline);border-radius:20px;background:var(--color-surface);box-shadow:var(--shadow-xs)}.region-grid-step-card,.region-grid-rule-card{padding:1rem}.region-grid-step-number,.region-grid-rule-number{display:inline-grid;width:2rem;height:2rem;place-items:center;border-radius:50%;background:var(--pillar-puzzles);color:var(--color-on-brand);font-size:.78rem;font-weight:900}.region-grid-step-card h3,.region-grid-rule-card h3,.region-grid-difficulty-card h3{color:var(--color-on-surface);font-family:var(--font-headline);font-size:1.08rem;font-weight:900;line-height:1.25}.region-grid-step-card h3,.region-grid-rule-card h3{margin-top:.85rem}.region-grid-step-card p,.region-grid-rule-card p,.region-grid-difficulty-card p{color:var(--color-on-surface-variant);font-size:.82rem;line-height:1.65}.region-grid-step-card p,.region-grid-rule-card p{min-height:4.1em;margin-top:.45rem}.region-grid-step-visual,.region-grid-rule-visual{display:grid;min-height:190px;margin-top:1rem;place-items:center;border-radius:15px;background:color-mix(in srgb,var(--pillar-puzzles-soft) 58%,var(--color-surface));padding:.75rem}.region-grid-difficulty-card{display:flex;flex-direction:column;padding:.9rem}.region-grid-difficulty-visual{border-radius:15px;background:color-mix(in srgb,var(--pillar-puzzles-soft) 52%,var(--color-surface));padding:.65rem}.region-grid-difficulty-meta{display:flex;align-items:center;justify-content:space-between;gap:.75rem;margin-top:.9rem}.region-grid-difficulty-size{color:var(--pillar-puzzles-dark);font-size:.75rem;font-weight:900}.region-grid-difficulty-card p{margin-top:.45rem}.region-grid-difficulty-card .ui-button{width:100%;margin-top:auto;padding:.65rem .8rem;font-size:.78rem}.region-grid-print-card{display:grid;grid-template-columns:minmax(17rem,.82fr) minmax(0,1.18fr);align-items:center;gap:clamp(1.5rem,5vw,4rem);overflow:hidden;border:1px solid color-mix(in srgb,var(--color-brand) 16%,var(--color-hairline));border-radius:26px;background:radial-gradient(circle at 0 100%,color-mix(in srgb,var(--color-brand-soft) 82%,transparent),transparent 20rem),linear-gradient(135deg,var(--color-canvas-soft),var(--color-surface));padding:clamp(1.5rem,5vw,3.5rem)}.region-grid-print-paper-wrap{display:grid;place-items:center}.region-grid-print-paper{width:min(100%,290px);border:1px solid var(--color-hairline-strong);border-radius:14px;background:var(--color-surface);padding:1rem;box-shadow:0 18px 40px color-mix(in srgb,var(--color-ink) 13%,transparent);transform:rotate(-2deg)}.region-grid-print-paper-kicker{border-bottom:1px solid var(--color-hairline);padding-bottom:.45rem;color:var(--color-on-surface-muted);font-size:.55rem;font-weight:900;letter-spacing:.08em;text-transform:uppercase}.region-grid-print-paper h3{margin-block:.75rem;color:var(--color-on-surface);font-family:var(--font-headline);font-size:.95rem;font-weight:900;text-align:center}.region-grid-print-paper-rules{display:grid;grid-template-columns:repeat(2,1fr);gap:.3rem;margin-top:.65rem;color:var(--color-on-surface-muted);font-size:.47rem;font-weight:750;line-height:1.25}.region-grid-print-copy h2{margin-top:.75rem;color:var(--color-on-surface);font-family:var(--font-headline);font-size:clamp(2rem,4vw,2.65rem);font-weight:900;letter-spacing:-.04em;line-height:1.08}.region-grid-print-copy>p:last-of-type{max-width:650px;margin-top:1rem;color:var(--color-on-surface-variant);font-size:1rem;line-height:1.7}.region-grid-print-benefits{display:grid;gap:.65rem;margin-top:1.25rem}.region-grid-print-benefit{display:flex;align-items:flex-start;gap:.65rem;color:var(--color-on-surface-variant);font-size:.86rem;font-weight:750}.region-grid-print-benefit .material-symbols-outlined{color:var(--color-success-600);font-size:1.15rem}.region-grid-faq-wrap .faq-section{max-width:960px;margin-bottom:0}.region-grid-faq-wrap .faq-section>h2{margin-bottom:2rem}@media(max-width:1199px){.region-grid-rules,.region-grid-difficulties{grid-template-columns:repeat(2,minmax(0,1fr))}.region-grid-hero-pencil{right:-2.75rem}}@media(max-width:1023px){.region-grid-hero{grid-template-columns:minmax(0,1fr) minmax(18rem,.8fr)}.region-grid-app-statusbar,.region-grid-app-body{grid-template-columns:1fr}.region-grid-sidebar{grid-template-columns:repeat(2,minmax(0,1fr))}.region-grid-sidebar-rules,.region-grid-disclosure:last-child{grid-column:span 2}.region-grid-steps{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(min-width:1024px){.region-grid-hero{grid-template-columns:minmax(0,1.02fr) minmax(25rem,.98fr)}}@media(max-width:767px){.region-grid-content-wrapper{max-width:none}.region-grid-hero{grid-template-columns:1fr;padding-block:2.5rem 3rem}.region-grid-hero-title{max-width:11ch;font-size:clamp(2.55rem,12vw,3.25rem)}.region-grid-hero-actions{display:grid}.region-grid-hero-actions .ui-button{width:100%}.region-grid-capabilities{gap:.5rem}.region-grid-capability{min-height:36px;padding:.45rem .65rem;font-size:.72rem}.region-grid-hero-preview{padding:.25rem}.region-grid-hero-board-card{border-radius:22px;padding:.8rem}.region-grid-hero-pencil{right:-2.2rem;bottom:-2.4rem;width:7.5rem}.region-grid-game-section{padding-right:4px;padding-left:4px}.region-grid-game-intro{padding-inline:1rem}.region-grid-app-shell{border-radius:20px}.region-grid-app-statusbar{gap:.8rem;padding:.85rem}.region-grid-app-stats{grid-template-columns:repeat(2,minmax(0,1fr))}.region-grid-app-stat:nth-child(3){border-left:0}.region-grid-app-stat:nth-child(n+3){border-top:1px solid var(--color-hairline)}.region-grid-quick-guide{align-items:stretch;justify-content:stretch;padding:.65rem}.region-grid-quick-step{flex:1 1 8rem;justify-content:center;border-radius:12px}.region-grid-app-body{gap:.9rem;padding:.65rem}.region-grid-board-frame{border:0;background:transparent;padding:0;box-shadow:none}.region-grid-board-frame .ui-game-board{position:relative;left:50%;width:calc(100vw - 8px);max-width:none;gap:1px;border-radius:16px;padding:4px;transform:translate(-50%)}.region-grid-board-support{align-items:flex-start;padding-inline:.2rem}.region-grid-sidebar{grid-template-columns:1fr}.region-grid-sidebar-rules,.region-grid-disclosure:last-child{grid-column:auto}.region-grid-learning-section,.region-grid-extension-section{padding-block:2.5rem}.region-grid-steps,.region-grid-rules,.region-grid-difficulties{grid-template-columns:1fr}.region-grid-step-card,.region-grid-rule-card{display:grid;grid-template-columns:minmax(0,1fr) minmax(8rem,.72fr);align-items:center;gap:.8rem 1rem}.region-grid-step-card>:not(.region-grid-step-visual),.region-grid-rule-card>:not(.region-grid-rule-visual){grid-column:1}.region-grid-step-visual,.region-grid-rule-visual{grid-row:1 / span 3;grid-column:2;min-height:150px;margin-top:0;padding:.45rem}.region-grid-step-card p,.region-grid-rule-card p{min-height:0}.region-grid-print-card{grid-template-columns:1fr}.region-grid-print-paper{width:min(80%,270px)}}@media(max-width:419px){.region-grid-step-card,.region-grid-rule-card{grid-template-columns:1fr}.region-grid-step-visual,.region-grid-rule-visual{grid-row:auto;grid-column:1}}@media(prefers-reduced-motion:reduce){.region-grid-page *,.region-grid-page *:before,.region-grid-page *:after{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}html[data-region-grid-mode=play] .site-header,html[data-region-grid-mode=play] .site-footer,html[data-region-grid-mode=play] .region-grid-landing-shell,html[data-region-grid-mode=play] .region-grid-seo-content,html[data-region-grid-mode=play] .region-grid-game-intro{display:none}html[data-region-grid-mode=play] .region-grid-page{padding-top:0;background:var(--color-canvas)}html[data-region-grid-mode=play] .region-grid-game-section{padding:0}html[data-region-grid-mode=play] .region-grid-game-section>.ui-page-wrapper{max-width:none}html[data-region-grid-mode=play] .region-grid-game-frame{margin-top:0}html[data-region-grid-mode=play] .region-grid-app-shell{border-radius:0;box-shadow:none}html[data-region-grid-mode=play] main{min-height:100vh}
