:root{
  --bg:#f4f6f9; --surface:#fff; --text:#1a1f26; --muted:#5a6472;
  --primary:#199a4a; --primary-d:#157a3b; --border:#e2e7ee; --accent:#e23b3b;
  --radius:14px; --shadow:0 2px 14px rgba(20,30,50,.08);
  --maxw:1040px;
}
html[data-theme="dark"]{
  --bg:#0f141b; --surface:#171f2a; --text:#e8edf4; --muted:#9aa7b8;
  --border:#263241; --shadow:0 2px 18px rgba(0,0,0,.4);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg);color:var(--text);line-height:1.65;font-size:17px;-webkit-font-smoothing:antialiased}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto;border-radius:10px}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 18px}

/* Header */
header.site{position:sticky;top:0;z-index:50;background:var(--surface);border-bottom:1px solid var(--border);box-shadow:var(--shadow)}
.nav{display:flex;align-items:center;justify-content:space-between;height:62px;max-width:var(--maxw);margin:0 auto;padding:0 18px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.2rem;color:var(--text)}
.brand .logo{width:34px;height:34px;background:var(--primary);border-radius:9px;display:grid;place-items:center;font-size:20px}
.menu{display:flex;gap:22px;align-items:center}
.menu a{color:var(--text);font-weight:600;font-size:.97rem}
.icons{display:flex;gap:8px}
.icon-btn{width:38px;height:38px;border:1px solid var(--border);background:var(--surface);color:var(--text);
  border-radius:9px;cursor:pointer;font-size:17px;display:grid;place-items:center}
.icon-btn:hover{border-color:var(--primary)}
.burger{display:none}

/* Hero + juego */
.hero{text-align:center;padding:30px 0 10px}
h1{font-size:2.1rem;line-height:1.2;margin:.2em 0 .4em;font-weight:800}
.lead{color:var(--muted);max-width:760px;margin:0 auto 10px;font-size:1.05rem}

.game-shell{max-width:720px;margin:18px auto 8px;background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);box-shadow:var(--shadow);padding:16px}
.scorebar{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px;font-weight:700}
.scorebar .pill{background:var(--bg);border:1px solid var(--border);border-radius:30px;padding:6px 16px}
.board-wrap{position:relative;display:flex;justify-content:center}
canvas#board{display:block;border-radius:10px;touch-action:none;max-width:100%}
#overlay{position:absolute;inset:0;display:grid;place-items:center;text-align:center;
  background:rgba(10,15,25,.72);color:#fff;border-radius:10px;backdrop-filter:blur(2px)}
#overlay.hidden{display:none}
#overlay h2{margin:0 0 6px;font-size:1.6rem}
#overlay p{margin:0 0 14px;color:#d6deea}
.btn{background:var(--primary);color:#fff;border:none;border-radius:10px;padding:11px 26px;
  font-size:1rem;font-weight:700;cursor:pointer}
.btn:hover{background:var(--primary-d)}
.btn.ghost{background:transparent;color:var(--text);border:1px solid var(--border)}

/* Controles / config */
.controls{display:flex;gap:8px;justify-content:center;margin:14px 0 4px;flex-wrap:wrap}
.config{margin-top:14px;border-top:1px solid var(--border);padding-top:14px}
.config h3{font-size:.95rem;margin:12px 0 6px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}
.opts{display:flex;gap:8px;flex-wrap:wrap}
.opt{border:1px solid var(--border);background:var(--bg);border-radius:9px;padding:7px 13px;cursor:pointer;
  font-weight:600;font-size:.9rem;user-select:none}
.opt.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.opt:hover{border-color:var(--primary)}

/* D-pad móvil */
.dpad{display:none;grid-template-columns:repeat(3,54px);grid-template-rows:repeat(3,54px);
  gap:6px;justify-content:center;margin:14px auto 0}
.dpad button{border:1px solid var(--border);background:var(--surface);border-radius:10px;font-size:20px;cursor:pointer;color:var(--text)}
#dpad-up{grid-column:2;grid-row:1}#dpad-left{grid-column:1;grid-row:2}
#dpad-right{grid-column:3;grid-row:2}#dpad-down{grid-column:2;grid-row:3}
@media(max-width:720px){.dpad{display:grid}}

/* Contenido */
main .wrap{padding-top:10px;padding-bottom:30px}
article h2{font-size:1.55rem;margin:1.6em 0 .5em;font-weight:800}
article h3{font-size:1.2rem;margin:1.3em 0 .4em}
article h4{font-size:1.05rem;margin:1.1em 0 .3em}
article ul,article ol{padding-left:1.3em}
article li{margin:.3em 0}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:20px 22px;margin:18px 0;box-shadow:var(--shadow)}
.faq details{border-bottom:1px solid var(--border);padding:14px 0}
.faq summary{font-weight:700;cursor:pointer;font-size:1.05rem}
.faq p{color:var(--muted);margin:.6em 0 0}
.crumbs{font-size:.9rem;color:var(--muted);margin:14px 0}
.crumbs a{color:var(--muted)}
.grid-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin:20px 0}
.grid-cards a.tile{display:block;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:18px;box-shadow:var(--shadow);color:var(--text)}
.grid-cards a.tile:hover{border-color:var(--primary);text-decoration:none}
.grid-cards .tile h3{margin:.2em 0 .3em}
.grid-cards .tile p{color:var(--muted);font-size:.95rem;margin:0}

/* Footer */
footer.site{background:var(--surface);border-top:1px solid var(--border);margin-top:30px;padding:30px 0}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:24px}
footer h4{margin:0 0 10px}
footer ul{list-style:none;padding:0;margin:0}
footer li{margin:.3em 0}
.copy{text-align:center;color:var(--muted);font-size:.9rem;margin-top:24px;border-top:1px solid var(--border);padding-top:16px}
@media(max-width:680px){
  .menu{display:none}.burger{display:grid}
  .foot-grid{grid-template-columns:1fr}
  h1{font-size:1.6rem}
}