:root{
  --bg:#0b1530; --card:#14224a; --card2:#1b2f66;
  --fg:#f2f6ff; --muted:#a9b8dd;
  --acc:#25d07d; --acc2:#ffb020; --danger:#ff5d5d;
  --fs:100%; --radius:16px;
}
*{box-sizing:border-box}
html{font-size:calc(16px * var(--fs) / 100%)}
body{
  margin:0; font-family:system-ui,Segoe UI,Roboto,Arial,sans-serif;
  background:radial-gradient(1200px 600px at 50% -10%,#22377c,var(--bg));
  color:var(--fg); min-height:100vh;
}
body.hc{--bg:#000;--card:#000;--card2:#111;--fg:#fff;--muted:#e8e8e8;--acc:#00ff88;--acc2:#ffdd00}
body.hc .card,body.hc .modal-box{border:3px solid #fff}
.skip-link{position:absolute;left:-999px;background:#fff;color:#000;padding:.5rem}
.skip-link:focus{left:8px;top:8px;z-index:99}
.topbar{display:flex;justify-content:space-between;align-items:center;gap:.5rem;padding:.6rem 1rem;flex-wrap:wrap}
.brand{font-weight:800;letter-spacing:.5px}
.topnav{display:flex;gap:.4rem;flex-wrap:wrap}
main{max-width:1020px;margin:0 auto;padding:0 12px 40px}
.card{background:linear-gradient(180deg,var(--card),var(--card2));border:1px solid #2c4486;border-radius:var(--radius);padding:1rem;box-shadow:0 10px 30px rgba(0,0,0,.35)}
.menu{text-align:center}
.menu h1{margin:.2rem 0;font-size:2rem}
.tagline{color:var(--muted);margin:.2rem 0 1rem}
.menu-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:.6rem}
.big-btn{background:#243a7d;color:#fff;border:2px solid #3b5cc4;border-radius:12px;padding:.8rem;font-size:1.05rem;cursor:pointer}
.big-btn small{display:block;font-weight:400;color:var(--muted);font-size:.8rem}
.big-btn.primary{background:var(--acc);border-color:var(--acc);color:#06280f;font-weight:800}
.big-btn.ghost{background:transparent}
.big-btn:focus-visible,.chip:focus-visible,button:focus-visible{outline:3px solid var(--acc2);outline-offset:2px}
.mvp-note{margin-top:.8rem;color:var(--muted)}
.diff-row{display:flex;gap:.4rem;align-items:center;justify-content:center;flex-wrap:wrap;margin:.5rem 0}
.diff-label{color:var(--muted);font-weight:700}
.chip.seg.active{background:var(--acc);border-color:var(--acc);color:#06280f;font-weight:800}
.unlock-banner{margin-top:.6rem;min-height:1.2em;color:var(--acc2);font-weight:700}
.game-screen{margin-top:12px}
.hidden{display:none!important}
.hud{display:flex;justify-content:space-between;align-items:center;gap:.5rem;flex-wrap:wrap;margin-bottom:.5rem}
.score{background:#0a1330;border-radius:10px;padding:.4rem .8rem;display:flex;gap:.5rem;align-items:center}
.dot{width:14px;height:14px;border-radius:50%;display:inline-block}
.dot.p1{background:#25d07d}.dot.p2{background:#ff6b6b}
body.hc .dot.p1{background:#00ff88}body.hc .dot.p2{background:#ffdd00}
body.patterns .dot.p1{border-radius:2px}body.patterns .dot.p2{clip-path:polygon(50% 0,100% 100%,0 100%)}
.score-info{color:var(--muted)}
.canvas-wrap{position:relative;aspect-ratio:16/9;background:#071033;border-radius:12px;overflow:hidden;border:2px solid #334fa8}
canvas{width:100%;height:100%;display:block;touch-action:none}
.announcer{position:absolute;left:0;right:0;text-align:center;font-weight:800;font-size:clamp(1.2rem,4vw,2.2rem);color:var(--acc2);text-shadow:0 2px 8px #000;pointer-events:none;min-height:1em}
.overlay{position:absolute;inset:0;background:rgba(3,8,26,.82);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.6rem;text-align:center;padding:1rem}
.row{display:flex;gap:.5rem;flex-wrap:wrap;justify-content:center}
.game-bar{display:flex;gap:.5rem;align-items:center;flex-wrap:wrap;margin-top:.6rem}
.chip{background:#0a1330;border:1px solid #3b5cc4;color:var(--fg);border-radius:999px;padding:.45rem .9rem;cursor:pointer}
.chip.big{font-weight:700}
.chip.danger{border-color:var(--danger);color:var(--danger)}
.hint{color:var(--muted);font-size:.85rem}
kbd{background:#00000066;border:1px solid #666;border-radius:4px;padding:0 .3em}
.touch{display:flex;justify-content:space-between;gap:.5rem;margin-top:.6rem;flex-wrap:wrap}
.touch-group{display:flex;gap:.5rem}
.touch button{min-width:64px;min-height:56px;font-size:1rem;border-radius:12px;border:2px solid #3b5cc4;background:#0a1330;color:#fff}
.touch button.act{background:var(--acc);color:#06280f;font-weight:800;border-color:var(--acc)}
.touch-note{color:var(--muted);font-size:.85rem}
/* Mostrar touch solo en táctil o pantallas chicas; en PC se puede ocultar pero se deja visible para mouse */
@media (hover:hover) and (pointer:fine){.touch{opacity:.95}}
.modal{position:fixed;inset:0;background:rgba(0,0,0,.6);display:flex;align-items:center;justify-content:center;padding:12px;z-index:50}
.modal-box{background:var(--card);border:1px solid #334fa8;border-radius:14px;padding:1rem;max-width:640px;width:100%;max-height:90vh;overflow:auto}
.modal-box label{display:block;margin:.6rem 0}
.modal-box input[type=range]{width:100%}
.check{display:flex;gap:.5rem;align-items:center}
.stats{background:#0a1330;border-radius:10px;padding:.7rem;white-space:pre-wrap}
.small{color:var(--muted);font-size:.85rem}
.keys{display:grid;gap:.4rem}
.key-row{display:flex;justify-content:space-between;align-items:center;background:#0a1330;border-radius:8px;padding:.4rem .6rem}
.a11y-list{text-align:left}
.foot{display:flex;gap:.5rem;flex-wrap:wrap;justify-content:center;color:var(--muted);margin-top:12px;font-size:.85rem}
.foot a{color:var(--fg)}
.auth-area{display:flex;gap:.4rem;align-items:center;flex-wrap:wrap;background:#0a133066;border:1px dashed #3b5cc4;border-radius:999px;padding:.2rem .6rem}
.auth-label{color:var(--muted);font-size:.85rem}
.auth-btn{font-size:.85rem;padding:.35rem .7rem}
.auth-user{display:flex;gap:.45rem;align-items:center;background:#0a1330;border:1px solid #3b5cc4;border-radius:999px;padding:.2rem .7rem .2rem .2rem;font-weight:700}
.auth-avatar{width:28px;height:28px;border-radius:50%;object-fit:cover}
.auth-avatar.auth-fallback{display:inline-flex;align-items:center;justify-content:center;background:var(--acc);color:#06280f;font-weight:800}
.auth-name{max-width:120px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
@media (max-width:640px){
  .menu h1{font-size:1.5rem}
  .touch-group{flex:1;justify-content:center}
  .hint{display:none}
}