/* Google Minesweeper landing page. System fonts only: no font requests, no font-swap layout shift. */
:root{
  color-scheme:dark;
  --bg-primary:#080e1a;--bg-secondary:#0b1220;--bg-card:#0f1a2e;--bg-glass:rgba(8,14,26,.88);
  --border:rgba(26,196,118,.16);--border-bright:rgba(26,196,118,.45);
  --accent:#1ac476;--accent-deep:#0fa85a;--accent-glow:rgba(26,196,118,.16);
  --accent-blue:#4aa8ff;--accent-teal:#0ff5d4;--on-accent:#04210f;
  --text:#e6f4ee;--text-2:#b7d3c6;--text-3:#8fb5a3;--danger:#ff6b86;
  --shadow-card:0 8px 40px rgba(0,0,0,.45);--shadow-glow:0 0 40px rgba(26,196,118,.12);
  --radius:14px;--radius-sm:9px;--header-h:64px;
  --font-body:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --font-display:"Avenir Next","Segoe UI Variable Display","Segoe UI",system-ui,-apple-system,Roboto,Arial,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}
[data-theme="light"]{
  color-scheme:light;
  --bg-primary:#eaf6f0;--bg-secondary:#d9efe4;--bg-card:#ffffff;--bg-glass:rgba(234,246,240,.9);
  --border:rgba(8,122,70,.2);--border-bright:rgba(8,122,70,.5);
  --accent:#087a46;--accent-deep:#066a3c;--accent-glow:rgba(8,122,70,.12);
  --accent-blue:#0a5bc4;--accent-teal:#006b5d;--on-accent:#ffffff;
  --text:#08201a;--text-2:#24503c;--text-3:#476c5a;--danger:#b3203f;
  --shadow-card:0 8px 30px rgba(0,50,25,.12);--shadow-glow:0 0 30px rgba(8,122,70,.08);
}
*,::before,::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 12px);scrollbar-gutter:stable;-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{font-family:var(--font-body);background:var(--bg-primary);color:var(--text);line-height:1.7;overflow-x:clip;min-height:100vh;min-height:100dvh}
body::before{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:radial-gradient(ellipse 60% 40% at 15% 10%,rgba(26,196,118,.07),transparent 60%),
  radial-gradient(ellipse 50% 40% at 85% 90%,rgba(26,143,255,.07),transparent 60%),
  repeating-linear-gradient(0deg,transparent 0 39px,rgba(26,196,118,.03) 39px 40px),
  repeating-linear-gradient(90deg,transparent 0 39px,rgba(26,196,118,.03) 39px 40px)}
img,svg{display:block;max-width:100%}
a{color:var(--accent);text-decoration:none;transition:color .2s}
a:hover{color:var(--accent-teal)}
:focus-visible{outline:3px solid var(--accent-blue);outline-offset:3px;border-radius:6px}
.skip{position:absolute;left:-9999px;top:8px;background:var(--accent);color:var(--on-accent);padding:.6rem 1rem;border-radius:8px;z-index:300;font-weight:700}
.skip:focus{left:8px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* tiny scrollbars */
*{scrollbar-width:thin;scrollbar-color:var(--accent) transparent}
::-webkit-scrollbar{width:6px;height:6px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--accent);border-radius:6px}

.wrap{width:min(100% - 2rem,1200px);margin-inline:auto}
@media (min-width:1700px){.wrap{width:min(100% - 4rem,1360px)}}

/*  header  */
.site-header{position:sticky;top:0;z-index:100;background:var(--bg-glass);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-bottom:1px solid var(--border);padding-top:env(safe-area-inset-top)}
.nav-inner{height:var(--header-h);display:flex;align-items:center;gap:1rem}
.logo{display:flex;align-items:center;gap:.6rem;font-family:var(--font-display);font-weight:900;font-size:1.15rem;color:var(--text);white-space:nowrap}
.logo img{width:34px;height:34px;border-radius:9px}
.logo span{color:var(--accent)}
.logo .g{color:inherit}
.logo:hover{color:var(--text)}
.main-menu{display:flex;gap:.15rem;margin-inline:auto}
.main-menu a{font-size:.88rem;font-weight:600;color:var(--text-2);padding:.45rem .75rem;border-radius:var(--radius-sm);white-space:nowrap;transition:background .2s,color .2s}
.main-menu a:hover,.main-menu a.active{color:var(--accent);background:var(--accent-glow)}
.nav-actions{display:flex;align-items:center;gap:.5rem;flex-shrink:0}
.icon-btn{width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--bg-card);color:var(--text);cursor:pointer;transition:border-color .2s,background .2s}
.icon-btn:hover{border-color:var(--accent);background:var(--accent-glow)}
.icon-btn svg{width:22px;height:22px}
.theme-toggle .moon{display:none}
[data-theme="light"] .theme-toggle .sun{display:none}
[data-theme="light"] .theme-toggle .moon{display:block}
.hamburger{display:none}

/*  buttons  */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.55rem;min-height:46px;font:inherit;font-family:var(--font-display);font-weight:800;font-size:.95rem;border-radius:11px;padding:.7rem 1.5rem;cursor:pointer;border:1px solid transparent;transition:transform .2s,box-shadow .2s,background .2s,border-color .2s;text-align:center;line-height:1.2}
.btn svg{width:20px;height:20px;flex:none}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent-deep));color:var(--on-accent);box-shadow:0 4px 20px rgba(26,196,118,.3)}
.btn-primary:hover{transform:translateY(-2px);color:var(--on-accent);box-shadow:0 8px 28px rgba(26,196,118,.4)}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--border-bright)}
.btn-ghost:hover{background:var(--bg-card);border-color:var(--accent);color:var(--accent)}
.btn-install{padding:.5rem 1rem;min-height:44px;font-size:.85rem;background:var(--accent-glow);color:var(--accent);border-color:var(--border-bright)}
.btn-install:hover{background:var(--accent);color:var(--on-accent)}
.lbl-a2hs{display:none}
.ios .lbl-a2hs{display:inline}
.ios .lbl-install{display:none}
.standalone .js-install{display:none!important}

/*  mobile menu  */
.mobile-menu{position:fixed;inset:0 0 0 auto;width:280px;max-width:86vw;background:var(--bg-secondary);border-left:1px solid var(--border-bright);z-index:200;padding:calc(4.5rem + env(safe-area-inset-top)) 1.1rem 2rem;display:flex;flex-direction:column;gap:.2rem;box-shadow:-8px 0 40px rgba(0,0,0,.4);transform:translateX(100%);visibility:hidden;transition:transform .3s cubic-bezier(.4,0,.2,1),visibility 0s .3s;overflow-y:auto}
.mobile-menu.open{transform:none;visibility:visible;transition:transform .3s cubic-bezier(.4,0,.2,1)}
.mobile-menu a{font-weight:600;color:var(--text-2);padding:.8rem .9rem;border-radius:var(--radius-sm);border-bottom:1px solid var(--border)}
.mobile-menu a:hover{color:var(--accent);background:var(--accent-glow)}
.mobile-menu .btn{margin-top:1rem}
.menu-close{position:absolute;top:calc(.9rem + env(safe-area-inset-top));right:1rem}
.overlay{position:fixed;inset:0;background:rgba(0,0,0,.55);z-index:199;opacity:0;visibility:hidden;transition:opacity .3s,visibility 0s .3s}
.overlay.open{opacity:1;visibility:visible;transition:opacity .3s}

/*  hero  */
.hero{padding:clamp(2.5rem,7vw,5rem) 0 clamp(1.5rem,4vw,2.5rem);text-align:center}
.hero-inner{max-width:880px;margin-inline:auto}
.badge{display:inline-flex;align-items:center;gap:.5rem;background:var(--accent-glow);border:1px solid var(--border-bright);border-radius:99px;padding:.3rem 1rem;margin-bottom:1.4rem;font:600 .74rem var(--font-mono);color:var(--accent);text-transform:uppercase;letter-spacing:.09em}
.badge i{width:7px;height:7px;border-radius:50%;background:var(--accent);animation:pulse 1.6s infinite}
@keyframes pulse{50%{opacity:.35;transform:scale(.7)}}
h1{font-family:var(--font-display);font-weight:900;font-size:clamp(2.3rem,7vw,4.6rem);line-height:1.06;letter-spacing:-.025em;margin-bottom:1.2rem}
h1 .l2{display:block;background:linear-gradient(100deg,var(--accent),var(--accent-teal) 55%,var(--accent-blue));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent;padding-bottom:.08em}
.lead{font-size:clamp(1rem,2.4vw,1.15rem);color:var(--text-2);max-width:640px;margin:0 auto 2rem}
.cta{display:flex;gap:.8rem;justify-content:center;flex-wrap:wrap}

/*  quick facts  */
.facts{background:var(--bg-card);border-block:1px solid var(--border);padding:1.1rem 0}
.facts ul{list-style:none;display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:1rem;text-align:center}
.facts strong{display:block;font:900 1.5rem/1 var(--font-display);color:var(--accent)}
.facts span{display:block;margin-top:.3rem;font:600 .68rem var(--font-mono);text-transform:uppercase;letter-spacing:.07em;color:var(--text-3)}

/*  game  */
.game-section{padding:clamp(1rem,3vw,2rem) 0}
.game-box{background:var(--bg-card);border:1px solid var(--border);border-radius:18px;overflow:hidden;box-shadow:var(--shadow-card),var(--shadow-glow)}
.game-bar{display:flex;align-items:center;justify-content:space-between;gap:.6rem .8rem;flex-wrap:wrap;padding:.6rem 1rem;background:var(--bg-secondary);border-bottom:1px solid var(--border)}
.game-bar h2{font:800 .95rem var(--font-display);color:var(--accent);display:flex;align-items:center;gap:.5rem}
.game-bar h2 small{font-weight:500;color:var(--text-3);font-size:.76rem}
.game-actions{display:flex;gap:.45rem}
.bar-btn{display:inline-flex;align-items:center;gap:.4rem;font:600 .78rem var(--font-mono);min-height:40px;padding:.4rem .85rem;border-radius:8px;cursor:pointer;border:1px solid var(--border);background:var(--bg-card);color:var(--text-2);white-space:nowrap;transition:all .2s}
.bar-btn:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-glow)}
.bar-btn svg{width:16px;height:16px}
/* Reserved size (CLS): the box has a fixed ratio before the iframe loads */
.game-frame{position:relative;width:100%;aspect-ratio:16/10;min-height:440px;max-height:min(88vh,880px);background:#4d7a30;contain:layout paint}
.game-frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0;display:block}
.loader{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1rem;background:#4d7a30;color:#fff;z-index:2;transition:opacity .35s}
.loader.hidden{opacity:0;pointer-events:none}
.ring{width:48px;height:48px;border-radius:50%;border:4px solid rgba(255,255,255,.3);border-top-color:#fff;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.game-frame:fullscreen,.game-frame:-webkit-full-screen{width:100%;height:100%;max-height:none;aspect-ratio:auto}
.game-frame.is-fs{position:fixed;inset:0;z-index:400;max-height:none;aspect-ratio:auto;min-height:0;height:100dvh}
.game-note{padding:.7rem 1rem;font-size:.82rem;color:var(--text-3);text-align:center;border-top:1px solid var(--border)}
kbd{font:600 .78rem var(--font-mono);background:var(--bg-secondary);border:1px solid var(--border-bright);border-bottom-width:2px;border-radius:5px;padding:.05rem .4rem;color:var(--text)}

/*  generic sections  */
.section{padding:clamp(2.5rem,6vw,4.5rem) 0}
.section+.section{border-top:1px solid var(--border)}
.section-head{text-align:center;margin-bottom:2.4rem}
.tag{display:inline-block;font:600 .72rem var(--font-mono);color:var(--accent);text-transform:uppercase;letter-spacing:.12em;margin-bottom:.5rem}
h2.title{font-family:var(--font-display);font-weight:800;font-size:clamp(1.65rem,4.2vw,2.6rem);line-height:1.18;letter-spacing:-.015em}
.title em{font-style:normal;color:var(--accent)}
.sub{color:var(--text-2);margin:.7rem auto 0;max-width:620px}
.grid{display:grid;gap:1.1rem}
.grid-feat{grid-template-columns:repeat(auto-fill,minmax(min(100%,265px),1fr))}
.grid-steps{grid-template-columns:repeat(auto-fill,minmax(min(100%,320px),1fr))}
.grid-games{grid-template-columns:repeat(auto-fill,minmax(min(100%,235px),1fr))}
.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem 1.3rem;transition:border-color .25s,transform .25s,box-shadow .25s}
.card:hover{border-color:var(--border-bright);transform:translateY(-3px);box-shadow:var(--shadow-card)}
.card h3{font:800 1.02rem var(--font-display);margin-bottom:.45rem}
.card p{font-size:.9rem;color:var(--text-2);line-height:1.65}
.ico{width:50px;height:50px;border-radius:12px;background:var(--accent-glow);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;font-size:1.6rem;margin-bottom:1rem}
ol.steps{list-style:none;counter-reset:s}
ol.steps li{counter-increment:s;display:flex;gap:1rem}
ol.steps li::before{content:counter(s,decimal-leading-zero);font:900 2.1rem/1 var(--font-display);color:var(--accent);opacity:.4;flex:none;width:2.8rem}

/* tables */
.table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius);background:var(--bg-card)}
table{width:100%;border-collapse:collapse;font-size:.92rem;min-width:420px}
th,td{padding:.8rem 1rem;text-align:left;border-bottom:1px solid var(--border)}
th{font:700 .72rem var(--font-mono);text-transform:uppercase;letter-spacing:.07em;color:var(--text-3);background:var(--bg-secondary)}
tr:last-child td{border-bottom:0}
td:first-child{font-weight:700}
.two-col{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,420px),1fr));gap:1.5rem;align-items:start}
.two-col h3{font:800 1.15rem var(--font-display);margin-bottom:.8rem}
.note{margin-top:.8rem;font-size:.84rem;color:var(--text-3)}

/* prose blocks */
.prose{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:clamp(1.3rem,4vw,2.5rem)}
.prose h3{font:800 1.12rem var(--font-display);color:var(--accent);margin:1.6rem 0 .5rem}
.prose h3:first-child{margin-top:0}
.prose p{color:var(--text-2);font-size:.96rem;margin-bottom:.8rem;max-width:78ch}
.prose ul{margin:0 0 .8rem 1.2rem;color:var(--text-2);font-size:.96rem}
.prose li{margin-bottom:.35rem}
.prose strong{color:var(--text)}
.pattern{font-family:var(--font-mono);background:var(--bg-secondary);border:1px solid var(--border);border-radius:6px;padding:.05rem .4rem;font-size:.88rem;color:var(--accent)}

/* FAQ */
.faq{display:flex;flex-direction:column;gap:.65rem;max-width:840px;margin-inline:auto}
.faq details{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);transition:border-color .2s}
.faq details[open]{border-color:var(--border-bright)}
.faq summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:56px;padding:.9rem 1.3rem;font:700 .98rem var(--font-display)}
.faq summary::-webkit-details-marker{display:none}
.faq summary:hover{color:var(--accent)}
.faq summary::after{content:"";width:.55rem;height:.55rem;flex:none;border-right:2px solid var(--accent);border-bottom:2px solid var(--accent);transform:rotate(45deg);margin-top:-.25rem;transition:transform .25s}
.faq details[open] summary::after{transform:rotate(-135deg);margin-top:.2rem}
.faq details p{padding:0 1.3rem 1.2rem;color:var(--text-2);font-size:.94rem}

/* more games */
.game-card{display:flex;flex-direction:column;gap:.6rem}
.game-card .em{font-size:2rem;width:54px;height:54px;border-radius:12px;background:var(--bg-secondary);border:1px solid var(--border);display:flex;align-items:center;justify-content:center}
.game-card p{flex:1}
.game-card a{display:inline-flex;align-items:center;min-height:40px;font:700 .8rem var(--font-mono);padding:.4rem .85rem;border-radius:7px;background:var(--accent-glow);border:1px solid var(--border-bright);width:fit-content}
.game-card a:hover{background:var(--accent);color:var(--on-accent)}

/*  footer  */
.site-footer{background:var(--bg-secondary);border-top:1px solid var(--border);padding:2.5rem 0 calc(1.5rem + env(safe-area-inset-bottom))}
.f-top{display:flex;flex-wrap:wrap;gap:2rem 3rem;justify-content:space-between;margin-bottom:2rem}
.f-brand{max-width:340px}
.f-brand .logo{margin-bottom:.7rem}
.f-brand p,.f-links a{font-size:.86rem;color:var(--text-3)}
.f-links h2{font:700 .76rem var(--font-display);text-transform:uppercase;letter-spacing:.09em;color:var(--text-2);margin-bottom:.7rem}
.f-links ul{list-style:none;display:flex;flex-direction:column;gap:.3rem}
.f-links a{display:inline-block;padding:.15rem 0}
.f-links a:hover{color:var(--accent)}
.disclaimer{background:rgba(255,77,109,.07);border:1px solid rgba(255,77,109,.25);border-radius:var(--radius-sm);padding:1rem 1.2rem;font-size:.8rem;line-height:1.7;color:var(--text-3)}
.disclaimer h2{font:800 .85rem var(--font-display);color:var(--danger);margin-bottom:.4rem}
.disclaimer p+p{margin-top:.5rem}
.f-bottom{border-top:1px solid var(--border);margin-top:1.4rem;padding-top:1.1rem;display:flex;flex-wrap:wrap;gap:.5rem 1rem;justify-content:space-between;font-size:.78rem;color:var(--text-3)}

/*  install dialog  */
dialog{margin:auto;border:1px solid var(--border-bright);border-radius:18px;background:var(--bg-card);color:var(--text);padding:1.6rem;width:min(92vw,440px);box-shadow:0 20px 60px rgba(0,0,0,.5)}
dialog::backdrop{background:rgba(0,0,0,.6)}
dialog h2{font:800 1.3rem var(--font-display);margin-bottom:.6rem}
dialog ol{margin:.8rem 0 1.2rem 1.2rem;color:var(--text-2);font-size:.95rem}
dialog li{margin-bottom:.5rem}
dialog .inl{display:inline-block;width:1.15em;height:1.15em;vertical-align:-.2em;color:var(--accent-blue)}
.help-ios,.help-other{display:none}
.ios .help-ios{display:block}
html:not(.ios) .help-other{display:block}

/*  responsive  */
@media (max-width:1080px){.btn-install .lbl{display:none}.btn-install{width:44px;padding:0}}
@media (max-width:900px){.main-menu{display:none}.hamburger{display:inline-flex}.nav-inner{gap:.6rem}.logo{margin-right:auto}}
@media (max-width:700px){
  .game-frame{aspect-ratio:3/4;min-height:460px;max-height:86dvh}
  .game-bar{justify-content:center}
  .game-bar h2 small{display:none}
  .facts ul{grid-template-columns:repeat(3,1fr)}
  .f-top{flex-direction:column}
}
@media (max-width:380px){
  .site-header .logo .g{display:none}
  .cta .btn{width:100%}
  .nav-actions{gap:.35rem}
  .logo{font-size:1rem}
  .logo img{width:30px;height:30px}
}
@media (max-height:500px) and (orientation:landscape){
  .game-frame{aspect-ratio:auto;height:calc(100dvh - 110px);min-height:300px}
  .hero{padding-top:1.5rem}
}
@media (hover:none){.card:hover{transform:none;box-shadow:none}}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,::before,::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}
@media print{.site-header,.mobile-menu,.game-section,.js-install{display:none!important}body{background:#fff;color:#000}}