/* Landing pages (/duo-sudoku/, /games-like-chess/): plain readable articles that search engines can index.
   Same brand and fonts as the game; light-only like the game. */
:root{
  --brand-blue:#3C7FBC; --blue-deep:#2f6699; --charcoal:#242424;
  --bg:#eef1f5; --surface:#ffffff; --surface-2:#f4f6f9; --ink:#242424; --muted:#5f6670; --line:#d8dde5;
  --f-display:"Nunito","Avenir Next",system-ui,sans-serif;
  --f-body:"Nunito Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --f-mono:"IBM Plex Mono",ui-monospace,Menlo,monospace;
  color-scheme:light;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--f-body);font-size:17px;line-height:1.6;
  padding:20px max(16px,env(safe-area-inset-left,0px)) 40px max(16px,env(safe-area-inset-right,0px))}
a{color:var(--blue-deep)}
a:focus-visible{outline:3px solid var(--ink);outline-offset:2px}
.wrap{max-width:820px;margin:0 auto}

.top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:28px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font:900 22px var(--f-display);letter-spacing:-.01em}
.brand img{width:40px;height:40px}
.brand .b{color:var(--brand-blue)}
.top .btn{font-size:15px;padding:9px 16px}

.crumbs{font:500 12px var(--f-mono);text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:0 0 10px}
.crumbs a{color:inherit}
h1{font:900 clamp(32px,6vw,52px)/1.05 var(--f-display);letter-spacing:-.025em;margin:0 0 14px;text-wrap:balance}
.lede{font-size:19px;color:var(--muted);margin:0 0 22px;max-width:60ch}
h2{font:800 clamp(24px,3.6vw,30px)/1.2 var(--f-display);letter-spacing:-.015em;margin:44px 0 12px}
h3{font:800 20px/1.25 var(--f-display);margin:0 0 6px}
p{margin:0 0 14px}
ul,ol{padding-left:22px;margin:0 0 14px}
li{margin-bottom:6px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:999px;padding:13px 24px;
  font:800 17px var(--f-display);text-decoration:none;border:2px solid var(--brand-blue);color:var(--blue-deep);background:var(--surface)}
.btn.primary{background:var(--brand-blue);color:#fff}
.btn.primary:hover{background:var(--blue-deep);border-color:var(--blue-deep)}
.btn:focus-visible{outline:3px solid var(--ink);outline-offset:3px}
.cta{display:flex;flex-wrap:wrap;align-items:center;gap:12px 18px;margin:0 0 28px}
.cta .note{color:var(--muted);font-size:15px}

.shot{display:block;width:100%;height:auto;border-radius:16px;border:1px solid var(--line);background:var(--surface);
  box-shadow:0 14px 34px rgba(36,36,36,.12)}
figure{margin:0 0 8px}
figcaption{font-size:14px;color:var(--muted);margin-top:8px;text-align:center}

.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px;margin:6px 0 14px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:18px}
.card p{margin:0;color:var(--muted);font-size:16px}
.card.live{border:2px solid var(--brand-blue)}
.card .btn{margin-top:14px;padding:9px 18px;font-size:15px}
.chip{display:inline-block;font:500 11px var(--f-mono);text-transform:uppercase;letter-spacing:.09em;padding:3px 9px;border-radius:999px;
  background:var(--surface-2);border:1px solid var(--line);margin-bottom:10px}
.chip.on{background:var(--brand-blue);border-color:var(--brand-blue);color:#fff}
.chip.soon{background:var(--charcoal);border-color:var(--charcoal);color:#fff}

.faq details{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:14px 18px;margin-bottom:10px}
.faq summary{font:800 18px var(--f-display);cursor:pointer}
.faq details p{margin:10px 0 0}

.end{margin-top:44px;padding:26px;border-radius:16px;background:var(--brand-blue);color:#fff;text-align:center}
.end h2{margin:0 0 8px;color:#fff}
.end p{opacity:.92}
.end .btn{background:#fff;border-color:#fff;color:var(--blue-deep)}

footer{margin-top:40px;padding-top:18px;border-top:1px solid var(--line);color:var(--muted);font-size:14px;
  display:flex;flex-wrap:wrap;gap:8px 18px;justify-content:center}
footer a{color:inherit}

@media (max-width:560px){
  body{font-size:16px}
  .lede{font-size:17px}
  .top .btn{display:none}
  .cta .btn{width:100%}
}