:root{--navy:#080d1a;--navy-alt:#0b1120;--white:#fff;--bg:#fff;--ink:#080d1a;--line:#e2e8f0;--muted:rgba(8,13,26,.7);--soft:rgba(8,13,26,.035);color-scheme:light}
:root[data-theme=dark]{--bg:#0b1120;--ink:#fff;--line:rgba(255,255,255,.14);--muted:rgba(255,255,255,.72);--soft:rgba(255,255,255,.045);color-scheme:dark}
*,*::before,*::after{box-sizing:border-box;font-family:"Times New Roman",Times,serif!important}html{scroll-padding-top:68px}body{margin:0;background:var(--bg);color:var(--ink);font-size:17px;line-height:1.55;min-height:100vh;min-height:100svh;display:flex;flex-direction:column}body.menu-open,body.game-expanded{overflow:hidden}button,input,textarea,select{font:inherit;color:inherit}button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a{color:inherit;text-decoration:none}p{margin:0 0 1rem}h1,h2,h3{line-height:1.15;margin:0 0 1rem}h1{font-size:clamp(2.3rem,5.8vw,4.5rem);letter-spacing:-.045em}h2{font-size:1.8rem;letter-spacing:-.025em}h3{font-size:1.3rem}svg{fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}[hidden]{display:none!important}:focus-visible{outline:2px solid currentColor;outline-offset:4px}button:disabled{cursor:default;opacity:.55}.container,.main-content{width:min(1200px,calc(100% - 48px));margin-inline:auto}.main-content{flex:1;padding-bottom:48px}.site-header{height:52px;padding:4px 16px;position:sticky;top:0;z-index:1000;background:#080d1a;color:#fff;flex-shrink:0}.header-inner{height:100%;display:grid;grid-template-columns:40px 1fr 40px;align-items:center;width:min(1200px,100%);margin:auto}.brand{justify-self:center;display:flex;align-items:center}.brand-logo{width:148px;height:30px;display:block;object-fit:contain}.brand picture{display:block}.icon-button{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;background:transparent;color:inherit;border:0;border-radius:5px;line-height:1;font-size:30px}.icon-button:hover{background:rgba(255,255,255,.12)}#theme-toggle .sun{display:none}[data-theme=dark] #theme-toggle .sun{display:inline-flex}[data-theme=dark] #theme-toggle .moon{display:none}.skip-link{position:fixed;top:-100px;left:16px;background:var(--bg);padding:8px 16px;z-index:1500}.skip-link:focus{top:8px}
.drawer-overlay{position:fixed;inset:0;background:rgba(8,13,26,.5);z-index:1100}.drawer{position:fixed;inset:0 auto 0 0;width:55vw;max-width:280px;height:100%;height:100dvh;background:#080d1a;color:#fff;z-index:1200;padding:10px 14px 24px;overflow-y:auto;overscroll-behavior:contain;transform:translateX(-100%);transition:transform .18s ease}.drawer.is-open{transform:translateX(0)}.drawer-top{display:flex;align-items:center;justify-content:space-between;gap:6px;padding:8px 0 14px}.drawer-top .icon-button{width:32px;height:32px;flex-shrink:0;font-size:26px}.drawer .drawer-brand{display:flex;align-items:center;gap:7px;padding:0;min-width:0;font-size:18px;font-weight:bold;white-space:nowrap}.drawer-brand img{width:24px;height:24px;flex-shrink:0}.drawer nav a{display:flex;align-items:center;gap:10px;font-size:15px;line-height:1.3;padding:8px 5px;overflow-wrap:anywhere}.drawer nav a:hover{background:rgba(255,255,255,.08)}.drawer-group{margin-top:12px}.drawer-group h2{margin:0 0 5px;padding:5px 6px;font-size:12px;letter-spacing:.13em;text-transform:uppercase;color:rgba(255,255,255,.6)}
.eyebrow{font-size:12px;letter-spacing:.15em;font-weight:bold;line-height:1.4}.home-hero{padding:52px 0 24px}.hero-inner{max-width:900px;margin:0 auto;text-align:center;display:flex;flex-direction:column;align-items:center}.hero-inner .eyebrow{margin-bottom:20px}.hero-inner h1{margin-bottom:20px}.hero-inner h1 em{font-weight:normal}.hero-description{font-size:21px;line-height:1.5;color:var(--muted)}.intro-meta{display:flex;justify-content:center;flex-wrap:wrap;gap:8px 22px;font-size:14px;color:var(--muted);margin-top:5px}.intro-meta span::before{content:'✓';margin-right:6px}.search-section{width:100%;padding:15px 0 34px}.portal-search{display:flex;align-items:center;gap:14px;max-width:750px;margin:auto;border:1px solid var(--ink);border-radius:9px;padding:9px 21px;background:var(--bg);box-shadow:0 5px 0 var(--soft)}.portal-search input{width:100%;min-width:0;background:transparent;border:0;padding:11px 0;font-size:19px;outline-offset:0}.search-hint{font-size:13px;color:var(--muted);white-space:nowrap}.collection-heading{display:flex;flex-direction:column;align-items:center;text-align:center;max-width:900px;margin:auto;padding-top:22px;border-top:1px solid var(--line)}.collection-heading .eyebrow{margin-bottom:11px}.collection-heading h2{font-size:31px;margin-bottom:10px}.collection-heading>p:last-child{color:var(--muted);margin:0}.collection-controls{display:flex;justify-content:center;align-items:center;gap:20px;margin:25px 0}.count-label{font-size:14px;white-space:nowrap;color:var(--muted);min-width:78px}.filters{display:flex;gap:6px;align-items:center}.filter{border:1px solid var(--line);border-radius:5px;background:var(--bg);padding:9px 19px;min-height:44px;font-size:16px}.filter[aria-pressed=true]{background:var(--ink);color:var(--bg);border-color:var(--ink)}.card-grid{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:17px}.card{display:flex;flex-direction:column;border:1px solid var(--line);padding:23px;border-radius:9px;min-height:248px;background:var(--bg);transition:border-color .15s,box-shadow .15s}.card:hover{border-color:var(--ink);box-shadow:0 5px 0 var(--soft)}.card-top{display:flex;align-items:center;gap:12px;margin-bottom:22px}.card-top .eyebrow{font-size:10px;color:var(--muted)}.card-symbol{border:1px solid var(--line);display:grid;place-items:center;min-width:40px;height:40px;font-weight:bold;font-size:21px;border-radius:6px;letter-spacing:-.04em}.card-arrow{margin-left:auto;font-size:22px}.card h2{font-size:25px;margin:0 0 9px}.card>p{color:var(--muted);font-size:17px;margin-bottom:22px}.card-bottom{display:flex;flex-wrap:wrap;gap:8px 12px;justify-content:space-between;margin-top:auto;padding-top:14px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}.card-bottom>span{color:var(--ink);font-weight:bold;white-space:nowrap}.closing-note{border-top:1px solid var(--line);margin-top:40px;padding:28px 0 0;text-align:center}.closing-note h2{font-size:26px;margin-bottom:10px}.closing-note p{color:var(--muted);font-size:17px}.closing-note a{font-size:16px;text-decoration:underline;text-underline-offset:4px}.empty-results{padding:50px 0;text-align:center}
.site-footer{background:#080d1a;color:#fff;margin-top:auto;padding:42px 24px 0}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;max-width:1200px;margin:0 auto;padding-bottom:34px}.footer-brand-block{margin-bottom:0}.footer-grid .footer-brand{display:flex;align-items:center;gap:10px;font-size:26px;line-height:1.2;font-weight:bold;margin:0 0 15px;color:#fff}.footer-brand img{flex-shrink:0}.footer-brand-block p{max-width:290px;font-size:16px;line-height:1.65;color:rgba(255,255,255,.72);margin:0}.footer-grid nav h2{font-size:13px;line-height:1.4;letter-spacing:.15em;text-transform:uppercase;color:#f59e0b;margin:0 0 16px}.footer-grid nav a{display:flex;align-items:center;gap:12px;width:fit-content;max-width:100%;color:rgba(255,255,255,.87);font-size:16px;line-height:1.4;padding:8px 0}.footer-grid nav a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}.nav-icon,[data-icon]{display:inline-flex;align-items:center;justify-content:center;width:18px;height:18px;flex-shrink:0}.nav-icon svg,[data-icon] svg{width:18px;height:18px;stroke-width:1.8}.copyright{border-top:1px solid rgba(255,255,255,.12);padding:20px 52px;max-width:1200px;margin:auto;font-size:13px;line-height:1.5;text-align:center;color:rgba(255,255,255,.65)}.back-to-top{position:fixed;right:20px;bottom:20px;bottom:max(20px,env(safe-area-inset-bottom));z-index:900;width:46px;height:46px;border-radius:50%;display:grid;place-items:center;border:1px solid rgba(255,255,255,.45);background:#080d1a;color:#fff;box-shadow:0 4px 16px rgba(8,13,26,.2)}.back-to-top:hover{background:#fff;color:#080d1a}.back-to-top svg{width:20px;height:20px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.breadcrumbs{display:flex;gap:9px;flex-wrap:wrap;font-size:14px;color:var(--muted);margin:24px 0}.breadcrumbs a:hover{text-decoration:underline}.page-heading{padding:12px 0 26px}.page-heading h1{font-size:clamp(2.2rem,4.5vw,3.6rem);margin-bottom:13px}.page-heading p{max-width:720px;color:var(--muted);font-size:19px;margin:0}.centered-heading{text-align:center;max-width:900px;margin:0 auto;padding:14px 0 30px}.centered-heading p{margin-inline:auto}.centered-heading .eyebrow{margin-bottom:16px}.tool-icon{width:76px;height:76px;margin:0 auto 17px;border:1px solid var(--line);border-radius:18px;display:grid;place-items:center}.tool-icon [data-icon],.tool-icon svg{width:43px;height:43px}.instruction{border:1px solid var(--line);background:var(--soft);padding:12px 18px;border-radius:6px;font-size:17px!important;line-height:1.5}.workspace{border:1px solid var(--line);border-radius:10px;padding:28px;margin:0 auto 40px;background:var(--bg);max-width:1000px}.workspace label{display:block;font-weight:bold;margin-bottom:7px}.workspace input:not([type=checkbox]),.workspace select,.workspace textarea{border:1px solid var(--line);border-radius:5px;padding:11px 12px;background:var(--bg);width:100%;min-height:46px;min-width:0}.workspace textarea{resize:vertical;min-height:230px;line-height:1.6}.workspace input::placeholder,.workspace textarea::placeholder{color:var(--muted);opacity:1}.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}.button{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--ink);background:var(--ink);color:var(--bg);border-radius:5px;padding:10px 20px;min-height:44px;font-weight:bold;line-height:1.3}.button.secondary{background:transparent;color:var(--ink);border-color:var(--line)}.button:hover{opacity:.85}.status{min-height:1.6em;margin:12px 0 0;font-size:15px;color:var(--muted)}.metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin-bottom:22px}.metric{background:var(--soft);border:1px solid var(--line);padding:16px;border-radius:6px}.metric strong{display:block;font-size:28px;font-variant-numeric:tabular-nums;line-height:1.2;overflow-wrap:anywhere}.metric span{font-size:14px;color:var(--muted)}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.fine-print{font-size:14px;color:var(--muted)}.article{max-width:780px;margin:36px auto 0;font-size:18px;line-height:1.75}.article h2{margin-top:34px;border-left:2px solid var(--ink);padding-left:16px;font-size:clamp(1.4rem,3vw,1.8rem)}.article h3{margin-top:26px}.article a{text-decoration:underline;text-underline-offset:3px}.article ul,.article ol{padding-left:24px}.notice{padding:16px;border:1px solid var(--line);border-radius:5px;font-size:16px;background:var(--soft)}.text-link{text-decoration:underline;text-underline-offset:3px}.legal-date{font-size:14px;color:var(--muted)}
.game-frame{--bg:#080d1a;--ink:#fff;--line:rgba(255,255,255,.18);--muted:rgba(255,255,255,.72);--soft:rgba(255,255,255,.06);background:#080d1a;color:#fff;color-scheme:dark;box-shadow:0 12px 30px rgba(8,13,26,.14);border:1px solid #0b1120;padding:23px;border-radius:16px}.game-toolbar{display:flex;justify-content:space-between;align-items:center;gap:12px;padding-bottom:18px;margin-bottom:23px;border-bottom:1px solid var(--line)}.game-toolbar p{font-size:13px;letter-spacing:.12em;margin:0}.fullscreen-button{font-size:15px;gap:8px;padding:9px 14px}.game-frame:fullscreen,.game-frame.is-expanded{width:100%;height:100%;max-width:none;margin:0;border-radius:0;overflow:auto;padding:24px clamp(16px,4vw,60px);background:#080d1a}.game-frame.is-expanded{position:fixed;inset:0;z-index:1400;width:100vw;height:100dvh}.game-frame::backdrop{background:#080d1a}.game-frame:fullscreen .game-layout,.game-frame.is-expanded .game-layout{max-width:1080px;margin:4vh auto}.game-frame .metric strong{font-size:29px}.game-frame .ttt-cell,.game-frame .tile.filled{background:#fff;color:#080d1a;box-shadow:0 3px 0 rgba(255,255,255,.18)}.game-frame .ttt-cell:empty{background:#0b1120;color:#fff;box-shadow:none}.game-frame .ttt-cell.winner{background:#fff;outline:3px double #080d1a;outline-offset:-8px}.game-frame .tile.high{background:#fff;color:#080d1a;outline:3px double #080d1a;outline-offset:-6px}.game-frame .tile:not(.filled){background:#0b1120}.game-frame .puzzle-board{background:rgba(255,255,255,.05)}
@media(max-width:980px){.card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:640px){.container,.main-content{width:calc(100% - 32px)}.home-hero{padding:34px 0 18px}.hero-inner h1{font-size:43px}.hero-inner .eyebrow{font-size:10px;max-width:260px}.hero-description{font-size:18px}.intro-meta{gap:7px 14px;font-size:12px}.search-section{padding:12px 0 27px}.portal-search{padding:7px 13px;gap:10px}.portal-search input{font-size:17px}.search-hint{display:none}.collection-heading{padding-top:24px}.collection-heading h2{font-size:27px}.collection-heading>p:last-child{font-size:16px}.collection-controls{gap:10px;flex-direction:column;margin:20px 0}.filters{width:100%}.filter{flex:1;padding:8px 10px}.count-label{font-size:13px;text-align:center}.card-grid{grid-template-columns:1fr;gap:14px}.card{padding:21px;min-height:215px}.card-top{margin-bottom:17px}.card h2{font-size:26px}.card>p{margin-bottom:19px}.card-bottom{font-size:14px}.closing-note{margin-top:28px;padding-top:23px}.closing-note h2{font-size:24px}.workspace{padding:18px;margin-bottom:28px}.metrics{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.metric{padding:12px}.metric strong{font-size:27px}.form-grid{grid-template-columns:1fr;gap:16px}.article{font-size:17px}.article h2{font-size:26px}.page-heading p{font-size:17px}.main-content{padding-bottom:32px}.tool-icon{width:66px;height:66px}.game-toolbar{margin-bottom:20px;gap:7px}.game-toolbar p{font-size:10px;letter-spacing:.08em}.fullscreen-button{font-size:14px;padding:8px 10px}.game-frame:fullscreen,.game-frame.is-expanded{padding:16px}.game-frame:fullscreen .game-layout,.game-frame.is-expanded .game-layout{margin:0 auto}.drawer{padding-inline:12px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}

@media(max-width:768px){.site-footer{padding:32px 24px 0}.footer-grid{display:flex;flex-direction:column;gap:24px;padding-bottom:26px}.footer-brand-block{margin-bottom:0}.footer-brand-block p{max-width:380px}.footer-grid nav h2{font-size:13px;margin-bottom:12px}.footer-grid nav a{font-size:16px;padding:9px 0}.copyright{font-size:12px;padding:19px 34px}.back-to-top{right:16px;bottom:16px;bottom:max(16px,env(safe-area-inset-bottom))}}

/* Editorial guides, progressive FAQ and lightweight post previews. */
.category-badge{display:inline-flex;align-items:center;gap:7px;border:1px solid var(--ink);border-radius:99px;padding:5px 12px;font-size:11px;font-weight:bold;line-height:1.4;letter-spacing:.1em;text-transform:uppercase;color:var(--ink);background:var(--bg)}
.centered-heading .category-badge{margin-bottom:16px}.editorial-heading{max-width:900px;margin:auto;text-align:center;padding:26px 0 32px}.editorial-heading h1{font-size:clamp(2.2rem,5vw,3.8rem);margin:18px 0;letter-spacing:-.035em}.editorial-heading>p{max-width:720px;margin:0 auto 18px;color:var(--muted);font-size:19px}.post-meta{display:flex;align-items:center;flex-wrap:wrap;gap:10px;font-size:12px;color:var(--muted)}.editorial-heading .post-meta{justify-content:center}.post-meta .category-badge{font-size:10px;padding:4px 9px}.post-meta time{white-space:nowrap}.byline{font-size:14px;color:var(--muted);margin-bottom:18px}
.article .steps{list-style:none;counter-reset:steps;padding:0;display:grid;gap:12px;margin:24px 0}.steps>li{counter-increment:steps;position:relative;min-height:70px;border:1px solid var(--line);border-radius:8px;padding:18px 18px 18px 64px;background:var(--bg);font-size:17px;line-height:1.6;transition:border-color .15s}.steps>li::before{content:counter(steps,decimal-leading-zero);position:absolute;top:18px;left:16px;width:32px;height:32px;display:grid;place-items:center;border:1px solid var(--ink);border-radius:50%;font-weight:bold;font-size:13px;line-height:1}.steps>li:hover{border-color:var(--ink)}
.article .faq-item{padding:0;margin:0;border-bottom:1px solid var(--line);overflow:hidden;scroll-margin-top:72px}.faq-item:first-of-type{border-top:1px solid var(--line)}.article .faq-item summary{display:flex;align-items:center;gap:18px;list-style:none;cursor:pointer;font-weight:bold;font-size:18px;line-height:1.45;padding:20px 2px}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary::marker{content:''}.faq-item summary>span:first-child{flex:1;min-width:0}.faq-chevron{margin-left:auto;flex:none;transition:transform .2s;width:18px;height:18px}.faq-item[open]:not([data-closing]) .faq-chevron{transform:rotate(180deg)}.faq-answer{padding:0 32px 20px 2px;color:var(--muted)}.faq-answer p{margin:0 0 12px}.faq-answer p:last-child{margin-bottom:0}.faq-item summary:focus-visible{outline-offset:-2px}.article-cta{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;border:1px solid var(--line);border-radius:8px;margin:32px 0;padding:20px}.article-cta p{margin:0;flex:1;min-width:180px}.article-cta .button{text-decoration:none}.formula{padding:18px;border:1px solid var(--line);border-radius:6px;text-align:center;font-size:20px;font-variant-numeric:tabular-nums;overflow-wrap:anywhere}
.posts-section{max-width:1200px;margin:52px auto 0;border-top:1px solid var(--line);padding-top:38px}.posts-heading{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:24px}.posts-heading h2{font-size:34px;margin:8px 0}.posts-heading p{margin:0;color:var(--muted)}.posts-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;max-width:1200px;margin:0 auto}.post-card{display:flex;flex-direction:column;min-width:0;border:1px solid var(--line);border-radius:9px;overflow:hidden;background:var(--bg)}.post-thumbnail{display:block;aspect-ratio:16/9;background:var(--soft);color:var(--ink);overflow:hidden}.post-thumbnail svg{display:block;width:100%;height:100%;stroke-width:1.5}.post-thumbnail svg text{fill:currentColor;stroke:none;font-weight:bold}.post-thumbnail svg .diagram-paper{fill:var(--bg)}.post-thumbnail svg .diagram-ink{fill:currentColor;stroke:none}.post-card-body{padding:22px;display:flex;flex-direction:column;flex:1}.post-card h3{font-size:25px;line-height:1.18;margin:16px 0 12px;letter-spacing:-.02em}.post-card h3 a:hover{text-decoration:underline;text-underline-offset:4px}.post-excerpt{color:var(--muted);font-size:16px;line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:20px}.post-read{font-weight:bold;font-size:15px;margin-top:auto;text-decoration:underline;text-underline-offset:4px;align-self:flex-start}.post-hero{max-width:780px;margin:0 auto 28px;border:1px solid var(--line);border-radius:10px}.post-hero svg{max-height:330px}.blog-body{margin-top:0}.blog-hub .posts-section{margin-top:0;border:0;padding-top:0}
@media(max-width:768px){.posts-grid{grid-template-columns:1fr;gap:22px}.posts-heading{align-items:start;flex-direction:column;gap:12px}.posts-section{margin-top:36px;padding-top:28px}.post-card-body{padding:20px}.editorial-heading{padding-top:16px}.editorial-heading>p{font-size:17px}.article .faq-item summary{font-size:17px;gap:12px}.article .steps>li{padding-right:14px;font-size:16px}.article-cta{align-items:start;flex-direction:column}}
@media(prefers-reduced-motion:reduce){.faq-chevron,.steps>li{transition:none}}

.faq-chevron:empty::after{content:'';display:block;width:8px;height:8px;border-right:1.8px solid currentColor;border-bottom:1.8px solid currentColor;transform:rotate(45deg);margin:2px 4px}