:root {
  --bg:#eef6ff; --ink:#0c4a6e; --muted:#334155; --panel:#fff; --line:#bae6fd;
  --accent:#0369a1; --accent-2:#e11d48; --paper:#f8fafc;
  --font-d:"Archivo Black", system-ui, sans-serif; --font-b:"IBM Plex Sans", system-ui, sans-serif;
}
*{box-sizing:border-box} body{margin:0;font-family:var(--font-b);background:
repeating-linear-gradient(90deg,transparent,transparent 24px,rgba(3,105,161,.04) 24px,rgba(3,105,161,.04) 25px),
var(--bg);color:var(--ink);line-height:1.55}
a{color:var(--accent);text-decoration:none} a:hover{color:var(--accent-2)}
.wrap{width:min(1040px,calc(100% - 2rem));margin-inline:auto}
.notice{background:var(--accent-2);color:#fff;text-align:center;padding:.5rem;font-weight:700;letter-spacing:.04em}
.site-header{background:rgba(255,255,255,.92);border-bottom:3px solid var(--ink);position:sticky;top:0;z-index:30}
.header-row{display:flex;align-items:flex-end;justify-content:space-between;gap:1rem;padding:.9rem 0}
.brand{color:var(--ink)}
.brand strong{font-family:var(--font-d);font-size:clamp(1.3rem,3vw,1.8rem);letter-spacing:.02em;display:block}
.brand span{font-size:.72rem;text-transform:uppercase;letter-spacing:.16em;color:var(--muted)}
.nav{display:flex;gap:.85rem;flex-wrap:wrap;align-items:center}
.nav a{font-weight:700;color:var(--muted);text-transform:uppercase;font-size:.82rem;letter-spacing:.06em}
.nav a[aria-current="page"]{color:var(--accent-2);border-bottom:3px solid var(--accent-2)}
.nav-cta{background:var(--ink);color:#fff!important;padding:.5rem .75rem}
.menu-btn{display:none;border:2px solid var(--ink);background:#fff;padding:.4rem .65rem}
.arena-hero{padding:2.2rem 0 1.5rem;text-align:center}
.arena-hero h1{font-family:var(--font-d);font-size:clamp(2.4rem,7vw,4.2rem);margin:0 0 .8rem;line-height:.95;text-transform:uppercase}
.arena-hero p{margin:0 auto 1.2rem;max-width:46ch;color:var(--muted)}
.cta-col{display:grid;gap:.55rem;max-width:280px;margin:0 auto 1.5rem}
.btn{display:inline-flex;justify-content:center;align-items:center;padding:.85rem 1rem;font-weight:800;border:2px solid var(--ink);text-transform:uppercase;letter-spacing:.04em}
.btn-primary{background:var(--accent-2);color:#fff;border-color:var(--accent-2)}
.btn-ghost{background:#fff;color:var(--ink)}
.bracket{display:grid;grid-template-columns:1fr auto 1fr;gap:1rem;align-items:stretch;margin:2rem 0}
.bracket-col{display:grid;gap:.7rem}
.bracket-card{background:#fff;border:2px solid var(--ink);padding:1rem}
.bracket-card h3{font-family:var(--font-d);margin:0 0 .4rem;text-transform:uppercase}
.bracket-mid{display:grid;place-items:center;font-family:var(--font-d);font-size:1.4rem;color:var(--accent-2)}
.metrics{display:flex;flex-wrap:wrap;justify-content:center;gap:.5rem;margin:1rem 0}
.metrics span{border:2px solid var(--ink);background:#fff;padding:.35rem .7rem;font-size:.75rem;font-weight:800;text-transform:uppercase}
.section{padding:1.5rem 0}
.section-head{text-align:center;margin-bottom:1rem}
.section-head h2{font-family:var(--font-d);text-transform:uppercase;margin:0 0 .4rem}
.faq details{border:2px solid var(--ink);background:#fff;padding:.8rem 1rem;margin:.55rem 0}
.site-footer{background:var(--ink);color:#e0f2fe;padding:2rem 0 1.3rem;margin-top:2rem}
.footer-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:1rem}
.site-footer h3{font-family:var(--font-d);color:#fff;text-transform:uppercase;margin:0 0 .5rem}
.site-footer a{color:#7dd3fc} .site-footer nav{display:grid;gap:.25rem}
.legal-line{border-top:1px solid rgba(255,255,255,.2);margin-top:1rem;padding-top:.9rem;font-size:.84rem}
.page-hero{text-align:center;padding:1.8rem 0 1rem}
.page-hero h1{font-family:var(--font-d);text-transform:uppercase;margin:0 0 .5rem}
.form{display:grid;gap:.7rem;max-width:480px;margin-inline:auto} .form input,.form textarea,.form select{font:inherit;padding:.7rem;border:2px solid var(--ink)}
.credit-bar,.demo-panel{background:#fff;border:2px solid var(--ink);padding:1rem;margin-bottom:1rem}
.credit-bar{display:flex;justify-content:space-between;flex-wrap:wrap;gap:.6rem}
.game-controls{display:flex;flex-wrap:wrap;gap:.55rem;justify-content:center;align-items:end;margin-top:.8rem}
.game-controls label{display:grid;gap:.2rem;font-size:.88rem;color:var(--muted)}
.game-controls select,.game-controls input{font:inherit;padding:.45rem .6rem;border:2px solid var(--ink)}
.game-msg{text-align:center;color:var(--muted)}
.ttt{display:grid;grid-template-columns:repeat(3,1fr);gap:.4rem;max-width:240px;margin:1rem auto}
.ttt button{aspect-ratio:1;font-size:1.6rem;font-weight:800;border:2px solid var(--ink);background:#fff;cursor:pointer}
.react-ring{width:160px;height:160px;border-radius:50%;margin:1rem auto;border:8px solid var(--line);display:grid;place-items:center;font-weight:800;cursor:pointer;user-select:none}
.react-ring.ready{border-color:var(--accent-2);background:#ffe4e6}
.react-ring.go{border-color:#16a34a;background:#dcfce7}
@media(max-width:900px){.bracket,.footer-grid{grid-template-columns:1fr}.menu-btn{display:inline-flex}.nav{display:none;width:100%;flex-direction:column}.nav.open{display:flex}.header-row{flex-direction:column;align-items:flex-start}}


/* --- upgrade: background hero + unique notice + locked games --- */
body{
  background-image:
    linear-gradient(rgba(8,30,50,.72), rgba(12,20,30,.9)),
    url('/hero.jpg');
  background-size: cover;
  background-attachment: fixed;
  background-position: center;
}
.site-header, .rail, .demo-panel, .credit-bar, .island, .soft-box, .stack-item, .bracket-card, .faq details, .stat-strip, .list-rows, .hero-banner{
  backdrop-filter: blur(6px);
}
.notice-island{
  background: linear-gradient(90deg,#134e4a,#0f766e);
  color:#ecfeff;
  display:flex; gap:.75rem; flex-wrap:wrap; align-items:center; justify-content:center;
  border-bottom:3px solid #f97316;
  font-weight:700;
}
.notice-badge{
  background:#f97316; color:#fff; padding:.2rem .55rem; border-radius:999px; font-size:.75rem; letter-spacing:.04em;
}
.notice-rail{
  background:#1c1917; color:#fef3c7; border-bottom:2px solid #a16207;
  text-align:left; padding:.65rem 1.2rem; font-size:.95rem;
}
.notice-stack{
  background: linear-gradient(90deg,#0e7490,#db2777);
  color:#fff; font-weight:800; letter-spacing:.06em; text-transform:uppercase; font-size:.82rem;
}
.notice-arena{
  background:#e11d48; color:#fff; font-weight:800; letter-spacing:.08em; text-transform:uppercase;
  display:flex; gap:.7rem; justify-content:center; align-items:center; flex-wrap:wrap;
}
.notice-flag{
  background:#0c4a6e; padding:.2rem .55rem; border:2px solid #fff;
}
.game-catalog{display:grid; gap:.75rem; margin:1rem 0 2rem}
.game-item{
  display:grid; grid-template-columns: 64px 1fr auto; gap:1rem; align-items:center;
  background:rgba(255,255,255,.92); border:1px solid rgba(0,0,0,.08); padding:1rem; border-radius:1rem;
}
.game-rank{
  width:64px; height:64px; display:grid; place-items:center; font-weight:900; font-size:1.2rem;
  border-radius:1rem; background:#0f172a; color:#fde68a;
}
.game-item h3{margin:0 0 .25rem; font-size:1.15rem}
.game-item p{margin:0; color:#475569; font-size:.95rem}
.game-item .meta{display:inline-block; margin-top:.35rem; font-size:.75rem; font-weight:800; text-transform:uppercase; letter-spacing:.06em; color:#b45309}
.btn-locked, .btn:disabled.locked{
  opacity:.85; cursor:not-allowed; background:#334155 !important; color:#e2e8f0 !important; border-color:#334155 !important;
  display:inline-flex; gap:.35rem; align-items:center;
}
.lock-ico::before{content:"🔒 ";}
.dev-ico::before{content:"🛠️ ";}
.update-ico::before{content:"📅 ";}

.detail-grid{display:grid; gap:1rem; margin:1.5rem 0}
.detail-card{
  background:rgba(255,255,255,.92); border-left:4px solid #f59e0b; padding:1rem 1.1rem; border-radius:.75rem;
}
.detail-card h3{margin:0 0 .4rem}
.detail-card p{margin:0; color:#475569}
@media(max-width:700px){
  .game-item{grid-template-columns:1fr; }
  body{background-attachment:scroll}
}



/* === readability v2: solid panels, soft photo, dark ink === */
body{
  background-image:
    linear-gradient(rgba(248,250,252,.88), rgba(241,245,249,.92)),
    url('/hero.jpg') !important;
  background-size: cover !important;
  background-attachment: fixed !important;
  background-position: center !important;
  color: #0f172a !important;
}
.site-header, .rail{
  background: rgba(255,255,255,.96) !important;
  backdrop-filter: blur(10px);
}
.page-hero, .section, .content-panel, .prose, .faq details,
.game-item, .detail-card, .demo-panel, .credit-bar, .island, .soft-box,
.stack-item, .bracket-card, .stat-strip, .list-rows article, .hero-banner,
.carousel-card, .map-cell, .chip-card, .list-row{
  color: #0f172a;
}
.page-hero h1, .section-head h2, main h1, main h2,
.page-hero p, .section-head p, .wrap.section > p, .wrap.section > ul li{
  color: #0f172a !important;
  text-shadow: none !important;
}
.page-hero, .section.panelized, .content-panel{
  background: rgba(255,255,255,.94);
  border: 1px solid rgba(15,23,42,.08);
  border-radius: 1.1rem;
  padding: 1.25rem 1.35rem;
  margin: 1rem auto;
  box-shadow: 0 10px 30px rgba(15,23,42,.08);
}
.section-head h2{ color: #0f172a !important; }
.prose{
  background: rgba(255,255,255,.96);
  border-radius: 1rem;
  padding: 1.25rem 1.4rem;
  border: 1px solid rgba(15,23,42,.08);
}
.prose h2{ color: #0f766e !important; }
.prose p, .prose li{ color: #334155 !important; }
.faq details{
  background: #fff !important;
  color: #0f172a !important;
  border: 1px solid rgba(15,23,42,.1);
}
.faq summary{ color: #0f172a !important; }
.faq p{ color: #475569 !important; }
.brand, .brand strong, .nav a{ text-shadow: none; }
.site-footer{ color: #e2e8f0; }

/* catalog variants */
.catalog-list{ display:grid; gap:.55rem; }
.list-row{
  display:grid; grid-template-columns:72px 1fr auto; gap:1rem; align-items:center;
  background:#fff; border-left:6px solid #0f766e; padding:.9rem 1rem;
  box-shadow:0 4px 14px rgba(15,23,42,.06);
}
.list-row .rank{ font-weight:900; font-size:1.25rem; color:#0f766e; }
.list-row h3{ margin:0 0 .2rem; }
.list-row p{ margin:0; color:#475569; font-size:.92rem; }

.catalog-carousel{ display:flex; gap:1rem; overflow-x:auto; scroll-snap-type:x mandatory; padding: .4rem .2rem 1rem; }
.carousel-card{
  flex:0 0 min(280px,82vw); scroll-snap-align:start;
  background:#fff; border:1px solid #d6d3d1; padding:1.1rem; min-height:210px;
  display:flex; flex-direction:column; gap:.55rem;
}
.carousel-card .rank{ font-size:.75rem; letter-spacing:.12em; text-transform:uppercase; color:#a16207; font-weight:800; }
.carousel-hint{ font-size:.85rem; color:#57534e; margin:.25rem 0 .75rem; }

.catalog-map{
  display:grid; grid-template-columns:repeat(auto-fill,minmax(150px,1fr)); gap:.65rem;
}
.map-cell{
  background:linear-gradient(160deg,#ecfeff,#fff);
  border:2px dashed #0e7490; border-radius:1rem; padding:.9rem .75rem; text-align:center;
  min-height:150px; display:flex; flex-direction:column; justify-content:space-between; gap:.5rem;
}
.map-cell.open{ border-style:solid; background:linear-gradient(160deg,#cffafe,#fff); }
.map-cell.closed{ opacity:.9; background:#f8fafc; border-color:#94a3b8; }
.map-cell h3{ margin:0; font-size:1rem; }
.map-cell p{ margin:0; font-size:.8rem; color:#475569; }

.catalog-chips{ display:flex; flex-wrap:wrap; gap:.75rem; justify-content:center; }
.chip-card{
  width:min(220px,100%); background:#fff; border:3px solid #0c4a6e; padding:1rem;
  text-align:center; display:grid; gap:.45rem;
}
.chip-card .rank{ font-family: inherit; font-weight:900; letter-spacing:.08em; color:#e11d48; }
.chip-card.closed{ border-style:dashed; background:#f8fafc; }

.btn-locked, button.btn-locked{
  opacity:.9; cursor:not-allowed; background:#334155 !important; color:#f1f5f9 !important; border-color:#334155 !important;
}
.soon-ico::before{ content:"⏳ "; }
.lock-ico::before{ content:"🔒 "; }
.dev-ico::before{ content:"🛠️ "; }
.update-ico::before{ content:"📅 "; }
.meta-tag{ display:inline-block; margin-top:.3rem; font-size:.72rem; font-weight:800; text-transform:uppercase; letter-spacing:.06em; color:#b45309; }
@media(max-width:700px){
  .list-row{ grid-template-columns:1fr; }
  body{ background-attachment: scroll !important; }
}

/* === readability v3: restore rail contrast + solid header ink === */
.rail{
  background:#1c1917 !important;
  color:#f5f5f4 !important;
}
.rail .brand, .rail .brand strong{ color:#fff !important; }
.rail .brand span{ color:#d6d3d1 !important; }
.rail nav a{ color:#e7e5e4 !important; }
.rail nav a[aria-current="page"], .rail nav a:hover{ color:#fff !important; background:rgba(255,255,255,.08) !important; }
.site-header{
  background:rgba(255,255,255,.97) !important;
  border-bottom:1px solid rgba(15,23,42,.08);
}
.brand, .brand strong{ color:#0f172a !important; }
.brand span, .nav a{ color:#334155 !important; }
.nav a[aria-current="page"], .nav a:hover{ color:inherit; }

/* secondary page layout kits */
.sec-panel{background:rgba(255,255,255,.96);border:1px solid rgba(15,23,42,.08);border-radius:1.1rem;padding:1.25rem 1.4rem;margin:1rem auto;box-shadow:0 10px 30px rgba(15,23,42,.08);color:#0f172a}
.sec-panel h1,.sec-panel h2,.sec-panel h3{color:#0f172a;margin-top:0}
.sec-panel p,.sec-panel li{color:#334155}
.timeline{list-style:none;padding:0;margin:0;display:grid;gap:1rem}
.timeline li{display:grid;grid-template-columns:56px 1fr;gap:1rem;align-items:start}
.timeline .t-mark{width:56px;height:56px;border-radius:999px;background:#0f172a;color:#fde68a;display:grid;place-items:center;font-weight:900}
.quote-rail{display:grid;grid-template-columns:8px 1fr;gap:1rem;background:#fff;border-radius:1rem;overflow:hidden}
.quote-rail .bar{background:linear-gradient(#f97316,#0f766e)}
.quote-rail blockquote{margin:0;padding:1.2rem 1.4rem 1.2rem 0;font-size:1.15rem;font-weight:700;color:#0f172a}
.quote-rail cite{display:block;margin-top:.6rem;font-style:normal;font-size:.9rem;color:#64748b;font-weight:600}
.two-col{display:grid;grid-template-columns:1.1fr .9fr;gap:1.2rem}
.checklist{list-style:none;padding:0;margin:0;display:grid;gap:.65rem}
.checklist li{display:flex;gap:.7rem;align-items:flex-start;background:#fff;border:1px solid rgba(15,23,42,.08);padding:.85rem 1rem;border-radius:.8rem}
.checklist .ck{flex:0 0 auto;width:1.4rem;height:1.4rem;border-radius:.35rem;background:#0f766e;color:#fff;display:grid;place-items:center;font-size:.8rem;font-weight:900}
.steps{counter-reset:step;list-style:none;padding:0;margin:0;display:grid;gap:.9rem}
.steps li{counter-increment:step;display:grid;grid-template-columns:2.2rem 1fr;gap:.8rem;align-items:start}
.steps li::before{content:counter(step);width:2.2rem;height:2.2rem;border-radius:999px;background:#0f172a;color:#fff;display:grid;place-items:center;font-weight:900}
.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:.9rem}
.card-grid article{background:#fff;border:1px solid rgba(15,23,42,.1);border-radius:1rem;padding:1.1rem;color:#0f172a}
.card-grid h3{margin:0 0 .45rem;font-size:1.05rem}
.card-grid p{margin:0;color:#475569;font-size:.95rem}
.qa-list{display:grid;gap:.75rem}
.qa-list .q{font-weight:800;color:#0f172a}
.qa-list .a{color:#475569;margin:.2rem 0 0}
.split-form{display:grid;grid-template-columns:1fr 1fr;gap:1.2rem;align-items:start}
.legal-chip{display:inline-block;background:#f1f5f9;border:1px solid #cbd5e1;border-radius:.5rem;padding:.25rem .55rem;font-size:.8rem;font-weight:700;margin:.15rem .15rem .15rem 0;color:#0f172a}
@media(max-width:800px){.two-col,.split-form{grid-template-columns:1fr}.timeline li{grid-template-columns:1fr}}