/* Tema cuaderno (claro) y pizarrón (oscuro), constelación y efecto de luz. Ver README.md. */
:root{
  --bg:#fbf7ec;--surface:#f3ecd9;--card:#fffdf6;--ink:#1d2a44;--muted:rgba(29,42,68,.74);--line:rgba(29,42,68,.17);
  --grid:rgba(43,92,217,.075);--margin:rgba(217,72,59,.5);--shadow:rgba(29,42,68,.14);
  --accent:#2346b8;--cta-bg:#2346b8;--cta-fg:#fff;
  --marker:#ffd84d;--on-marker:#1d2a44;--light-a:#ffc21f;--light-b:#f0705f;
  --tint-a:#dff3e6;--tint-b:#dfe7fd;--tint-c:#fdeec2;
  --fx-text:#1d2a44;--fx-line:#2b5cd9;--fx-1:#2346b8;--fx-2:#c9382b;--fx-3:#17835a;--fx-spark:#e09a00;
  --display:'Fraunces',Georgia,serif;--body:'Atkinson Hyperlegible',system-ui,sans-serif;--hand:'Caveat','Segoe Print',cursive;
  --bar:52px;--gutter:clamp(16px,5.5vw,80px);--cell:28px;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#16302a;--surface:#1c3a33;--card:#21433b;--ink:#f4f1e4;--muted:rgba(244,241,228,.76);--line:rgba(244,241,228,.18);
  --grid:rgba(244,241,228,.035);--margin:rgba(255,157,138,.45);--shadow:rgba(0,0,0,.3);
  --accent:#ffe27a;--cta-bg:#ffe27a;--cta-fg:#16302a;
  --marker:#ffe27a;--on-marker:#16302a;--light-a:#ffe27a;--light-b:#ff9d8a;
  --tint-a:#24513f;--tint-b:#27475c;--tint-c:#4d4a26;
  --fx-text:#f4f1e4;--fx-line:#f4f1e4;--fx-1:#9cc8ff;--fx-2:#ffa794;--fx-3:#96e6be;--fx-spark:#ffe27a;
}}
:root[data-theme="dark"]{
  --bg:#16302a;--surface:#1c3a33;--card:#21433b;--ink:#f4f1e4;--muted:rgba(244,241,228,.76);--line:rgba(244,241,228,.18);
  --grid:rgba(244,241,228,.035);--margin:rgba(255,157,138,.45);--shadow:rgba(0,0,0,.3);
  --accent:#ffe27a;--cta-bg:#ffe27a;--cta-fg:#16302a;
  --marker:#ffe27a;--on-marker:#16302a;--light-a:#ffe27a;--light-b:#ff9d8a;
  --tint-a:#24513f;--tint-b:#27475c;--tint-c:#4d4a26;
  --fx-text:#f4f1e4;--fx-line:#f4f1e4;--fx-1:#9cc8ff;--fx-2:#ffa794;--fx-3:#96e6be;--fx-spark:#ffe27a;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:var(--bar)}
body{margin:0;background-color:var(--bg);background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:var(--cell) var(--cell);color:var(--ink);font-family:var(--body);overflow-x:hidden}
a{color:inherit}
em{font-family:var(--hand);font-style:normal;font-weight:700;font-size:1.14em;letter-spacing:0;color:var(--accent)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* Barra superior */
.top{position:sticky;top:0;z-index:20;height:var(--bar);display:flex;align-items:stretch;background:color-mix(in srgb,var(--bg) 92%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.brand{flex:none;display:flex;align-items:center;padding:0 20px;border-right:1px solid var(--line)}
.brand img{display:block;height:26px;width:auto}
.nav{flex:1;min-width:0;display:flex;align-items:center;gap:2px;padding:0 10px;overflow-x:auto;scrollbar-width:none}
.nav::-webkit-scrollbar{display:none}
.top-end{flex:none;display:flex;align-items:stretch}
.menu-btn{display:none;width:52px;border:0;border-left:1px solid var(--line);background:none;color:var(--ink);cursor:pointer}
.menu-btn span,.menu-btn span:before,.menu-btn span:after{display:block;width:20px;height:2px;border-radius:2px;background:currentColor;transition:transform .25s,opacity .2s;position:relative}
.menu-btn span{margin:auto}.menu-btn span:before,.menu-btn span:after{content:"";position:absolute;left:0}
.menu-btn span:before{top:-6px}.menu-btn span:after{top:6px}
.top.open .menu-btn span{background:transparent}.top.open .menu-btn span:before{transform:translateY(6px) rotate(45deg)}.top.open .menu-btn span:after{transform:translateY(-6px) rotate(-45deg)}
.fc-info{display:none}
.theme{width:52px;border:0;border-left:1px solid var(--line);background:none;color:var(--ink);font-size:0;cursor:pointer}
.theme span{display:inline-block;width:18px;height:18px;border:2px solid currentColor;border-radius:50%;background:linear-gradient(90deg,currentColor 50%,transparent 50%)}
.top-cta{display:flex;align-items:center;padding:0 22px;background:var(--cta-bg);color:var(--cta-fg);font:700 14px var(--body);text-decoration:none;white-space:nowrap}

/* La luz: un marcatextos que se desliza, una estela que llega tarde y un resplandor. */
[data-light]{position:relative;isolation:isolate}
.light-item{position:relative;z-index:2;flex:none;background:none;border:0;cursor:pointer;padding:7px 13px;font:700 14px var(--body);text-decoration:none;white-space:nowrap;
  color:color-mix(in srgb,var(--on-marker) calc(var(--lit,0)*100%),var(--muted))}
.light-core,.light-tail,.light-glow{position:absolute;top:0;left:0;pointer-events:none;will-change:transform,width}
.light-core{z-index:1;border-radius:9px 7px 10px 6px;background:var(--marker);transition:transform .5s cubic-bezier(.22,1,.36,1),width .5s cubic-bezier(.22,1,.36,1);box-shadow:0 0 14px color-mix(in srgb,var(--light-a) 55%,transparent)}
.light-tail{z-index:0;background:linear-gradient(90deg,color-mix(in srgb,var(--light-a) 75%,transparent),color-mix(in srgb,var(--light-b) 75%,transparent));filter:blur(5px);opacity:.7;transition:transform .85s cubic-bezier(.16,1,.3,1),width .85s cubic-bezier(.16,1,.3,1)}
.light-glow{z-index:0;border-radius:50%;background:radial-gradient(closest-side,color-mix(in srgb,var(--light-a) 55%,transparent),color-mix(in srgb,var(--light-b) 24%,transparent) 55%,transparent);opacity:.55;transition:transform .68s cubic-bezier(.2,1,.32,1),opacity .3s}
[data-light].moving .light-glow{opacity:.95}
[data-light]:not(.ready) .light-core,[data-light]:not(.ready) .light-tail,[data-light]:not(.ready) .light-glow{transition:none}

/* Portada */
.hero{position:relative;min-height:calc(100svh - var(--bar));display:flex;align-items:center;justify-content:center;overflow:hidden;padding:48px var(--gutter) 64px}
.saberes{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
.hero-in{position:relative;z-index:2;text-align:center;max-width:860px}
.wordmark{margin:0;font:800 clamp(56px,11.5vw,146px)/.98 var(--display);letter-spacing:-.03em}
.tagline{margin:18px 0 0;font:600 clamp(23px,3.2vw,38px)/1.2 var(--display);letter-spacing:-.015em}
.tagline em{padding:0 .18em;background:linear-gradient(transparent 58%,var(--marker) 58%,var(--marker) 92%,transparent 92%);color:var(--ink)}
:root[data-theme="dark"] .tagline em{color:var(--on-marker);background:var(--marker);border-radius:6px}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .tagline em{color:var(--on-marker);background:var(--marker);border-radius:6px}}
.lead{max-width:540px;margin:18px auto 26px;color:var(--muted);line-height:1.6;font-size:1.08rem}
.actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}
.btn{display:inline-flex;align-items:center;gap:10px;padding:15px 24px;border-radius:12px;font:700 15px var(--body);text-decoration:none;transition:box-shadow .25s,transform .25s}
.btn.solid{background:var(--cta-bg);color:var(--cta-fg);box-shadow:0 4px 0 color-mix(in srgb,var(--cta-bg) 62%,#000)}
.btn.line{border:2px solid var(--ink);background:var(--card)}
.btn:not(.disabled):hover{transform:translateY(-2px);box-shadow:0 6px 0 color-mix(in srgb,var(--light-a) 80%,#000)}
.btn.disabled{opacity:.78;cursor:default}
.meta{margin:22px 0 0;font:400 13.5px/1.8 var(--body);color:var(--muted)}
.meta i{font-style:normal;margin:0 6px}
.float-cards{position:absolute;inset:0;z-index:2;pointer-events:none}
/* Efecto principal: solo íconos. Cada uno es un enlace; al pasar el mouse (o con el teclado)
   aparece una burbuja con el nombre y una línea de información. */
.fc{position:absolute;width:66px;height:66px;display:flex;align-items:center;justify-content:center;background:var(--card);border:1px solid var(--line);border-radius:18px;box-shadow:0 10px 26px var(--shadow);animation:drift 11s ease-in-out infinite alternate;pointer-events:auto;color:inherit;text-decoration:none;transition:box-shadow .2s,border-color .2s}
.fc b{font-size:1.7rem;font-weight:400;line-height:1;display:flex;transition:transform .25s cubic-bezier(.3,1.5,.5,1)}
.fc b img{width:44px;height:44px;object-fit:contain}
.fc:hover,.fc:focus-visible{border-color:var(--fx-2);box-shadow:0 14px 34px var(--shadow),0 0 0 3px color-mix(in srgb,var(--fx-2) 30%,transparent);z-index:5;animation-play-state:paused}
.fc:hover b,.fc:focus-visible b{transform:scale(1.14) rotate(-4deg)}
.fc:focus-visible{outline:none}
.fc .tip{position:absolute;top:calc(100% + 12px);left:50%;width:236px;padding:11px 13px;border-radius:12px;background:var(--ink);color:var(--bg);font:400 13px/1.45 var(--body);text-align:left;box-shadow:0 12px 30px var(--shadow);opacity:0;visibility:hidden;transform:translate(-50%,6px);transition:opacity .18s,transform .18s,visibility .18s;pointer-events:none}
.fc .tip:before{content:"";position:absolute;top:-6px;left:50%;width:12px;height:12px;background:inherit;transform:translateX(-50%) rotate(45deg);border-radius:2px}
.fc .tip strong{display:block;font:700 14px/1.3 var(--display);margin-bottom:3px}
.fc:hover .tip,.fc:focus-visible .tip{opacity:1;visibility:visible;transform:translate(-50%,0)}
/* Los de la orilla derecha abren la burbuja hacia la izquierda; los de abajo, hacia arriba. */
.fc.tr .tip{left:auto;right:-6px;transform:translate(0,6px)}.fc.tr .tip:before{left:auto;right:30px;transform:rotate(45deg)}
.fc.tr:hover .tip,.fc.tr:focus-visible .tip{transform:none}
.fc.tl .tip{left:-6px;transform:translate(0,6px)}.fc.tl .tip:before{left:30px;transform:rotate(45deg)}
.fc.tl:hover .tip,.fc.tl:focus-visible .tip{transform:none}
.fc.up .tip{top:auto;bottom:calc(100% + 12px)}.fc.up .tip:before{top:auto;bottom:-6px}
.tint-a{background:var(--tint-a)}.tint-b{background:var(--tint-b)}.tint-c{background:var(--tint-c)}
.c1{left:7%;top:13%}.c2{left:4%;top:48%;animation-delay:-3s}.c3{left:15%;top:77%;animation-delay:-6s}.c4{right:6%;top:11%;animation-delay:-2s}
.c5{right:3%;top:44%;animation-delay:-8s}.c6{right:13%;top:76%;animation-delay:-5s}.c7{left:24%;top:5%;animation-delay:-9s}.c8{right:25%;top:88%;animation-delay:-1s}
.c9{left:25%;top:89%;animation-delay:-4s}.c10{right:24%;top:3%;animation-delay:-7s}.c11{right:2%;top:27%;animation-delay:-10s}
.c12{left:14%;top:31%;animation-delay:-2.5s}.c13{right:14%;top:59%;animation-delay:-6.5s}
@keyframes driftS{from{transform:translateY(-2px)}to{transform:translateY(3px)}}
@keyframes drift{from{transform:translate3d(0,-9px,0) rotate(-1.6deg)}to{transform:translate3d(8px,11px,0) rotate(1.6deg)}}

/* Secciones numeradas: el borde izquierdo es el margen rojo del cuaderno. */
.band{margin:0 var(--gutter);background:color-mix(in srgb,var(--bg) 55%,transparent);border-left:2px solid var(--margin);border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.band-h{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding:14px clamp(16px,3vw,40px);border-bottom:1px solid var(--line);font:700 13.5px var(--body);color:var(--muted)}
.big{margin:0;padding:clamp(28px,5vw,56px) clamp(16px,3vw,40px);font:700 clamp(32px,5vw,58px)/1.08 var(--display);letter-spacing:-.02em;border-bottom:1px solid var(--line)}
.big.right{text-align:right}
.tabs{display:flex;gap:2px;padding:12px clamp(16px,3vw,40px);border-bottom:1px solid var(--line);overflow-x:auto;scrollbar-width:none}
.tabs::-webkit-scrollbar{display:none}
.tabs .light-item{padding:10px 18px;font-size:15px}
.panel{display:grid;grid-template-columns:1fr 1fr;gap:clamp(20px,5vw,64px);padding:clamp(24px,4vw,52px) clamp(16px,3vw,40px);min-height:280px;animation:rise .45s cubic-bezier(.22,1,.36,1)}
.panel[hidden]{display:none}
/* Capturas de la plataforma: siempre en modo claro y con datos de demostración */
.shots{grid-column:1/-1;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(14px,2vw,24px);align-items:start}
.shots.three{grid-template-columns:repeat(3,minmax(0,1fr))}
.shots.single{grid-template-columns:minmax(0,560px);justify-content:center;padding:clamp(20px,3vw,40px) clamp(16px,3vw,40px) 0}
.panel .shots.single{padding:0}
.shots.single.wide{grid-template-columns:minmax(0,1100px)}
.shots.side{grid-template-columns:minmax(0,560px) minmax(0,220px);justify-content:center}
.shots.phones{grid-template-columns:repeat(3,minmax(0,220px));justify-content:center}
.shot{margin:0}
.shot img{display:block;width:100%;height:auto;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:0 10px 30px rgba(29,42,68,.14)}
.shot.phone img{border-radius:22px;border:5px solid #1d2a44}
.shot figcaption{margin-top:10px;color:var(--muted);font-size:.92rem;line-height:1.45}
.abc+.shots{border-top:1px solid var(--line)}
/* Guía de instalación */
.guide{padding:clamp(24px,4vw,52px) clamp(16px,3vw,40px);max-width:1100px}
.guide h3{margin:clamp(28px,4vw,44px) 0 12px;font:650 clamp(21px,2.3vw,27px)/1.2 var(--display)}
.guide h4{margin:0 0 10px;font-size:1.05rem}
.guide p{line-height:1.65;color:var(--muted);margin:0 0 12px}
.guide-lead{font-size:1.1rem}
.guide-note{font-size:.92rem}
.guide code{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.92em;padding:1px 6px;border-radius:6px;background:var(--surface);border:1px solid var(--line);overflow-wrap:anywhere}
.guide-diagram{margin:20px 0 6px;color:var(--ink)}
.guide-diagram svg{display:block;width:100%;max-width:720px;height:auto;margin:auto}
.req-table{overflow-x:auto;border:1px solid var(--line);border-radius:12px;background:var(--card)}
.req-table table{width:100%;min-width:560px;border-collapse:collapse}
.req-table th,.req-table td{padding:12px 14px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line);line-height:1.5}
.req-table tr:last-child>*{border-bottom:0}
.req-table thead th{font-size:.85rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}
.req-table tbody th{width:22%;font-weight:700}
.guide-list,.guide-steps{margin:0 0 12px;padding-left:1.3em;line-height:1.65}
.guide-list li,.guide-steps li{margin:6px 0}
.guide-steps li::marker{font-weight:700}
.router-card{margin:16px 0 4px;padding:16px 18px;border:1px solid var(--line);border-radius:12px;background:var(--card)}
.router-card ul{margin:0;padding-left:1.2em;line-height:1.65}
.guide-two{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(14px,2vw,24px)}
.guide-two>div{padding:16px 18px;border:1px solid var(--line);border-radius:12px;background:var(--card)}
/* Rutas de menú: legibles, sin la letra manuscrita de los énfasis */
.guide p em,.guide li em{font:inherit;font-style:normal;font-weight:700;color:var(--ink)}
/* Preguntas frecuentes */
.faq{padding:clamp(16px,3vw,32px) clamp(16px,3vw,40px) clamp(28px,4vw,52px);max-width:900px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:16px;padding:18px 0;font-weight:700;font-size:1.05rem}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:'+';flex-shrink:0;font-size:1.3rem;line-height:1;color:var(--muted);transition:transform .2s ease}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item summary:focus-visible{outline:3px solid var(--ink);outline-offset:4px;border-radius:4px}
.faq-item p{margin:0 0 18px;color:var(--muted);line-height:1.65}
.faq-item code{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.92em;padding:1px 6px;border-radius:6px;background:var(--surface);border:1px solid var(--line)}
/* Funciones que se despliegan */
li.has-info{padding:0!important}
.info-toggle{display:flex;justify-content:space-between;align-items:center;gap:12px;width:100%;padding:14px 0;border:0;background:none;color:inherit;font:inherit;font-weight:700;text-align:left;cursor:pointer}
.feature li.has-info .info-toggle{padding:10px 0}
.info-toggle::after{content:'+';flex-shrink:0;font-size:1.2rem;line-height:1;color:var(--muted);transition:transform .2s ease}
.info-toggle[aria-expanded="true"]::after{transform:rotate(45deg)}
.info-toggle:focus-visible{outline:3px solid var(--ink);outline-offset:3px;border-radius:4px}
.info-panel{margin:0 0 14px!important;color:var(--muted);font-weight:400;line-height:1.6;font-size:.97rem}
/* Página de funciones */
.fn-cta{margin:0;padding:0 clamp(16px,3vw,40px) clamp(20px,3vw,32px)}
.band .fn-cta+.tabs{border-top:1px solid var(--line)}
.fn-hero .big{border-bottom:0}
.fn-intro{margin:0;padding:0 clamp(16px,3vw,40px) clamp(28px,4vw,48px);max-width:820px;color:var(--muted);font-size:1.1rem;line-height:1.65}
.band-h a{color:inherit}
.fn-nav{overflow-x:auto;scrollbar-width:none}
.fn-body{padding:clamp(24px,4vw,48px) clamp(16px,3vw,40px);max-width:1100px}
.fn-body>h3{margin:clamp(20px,3vw,32px) 0 12px;font:650 clamp(20px,2.2vw,25px)/1.2 var(--display)}
.fn-lead{color:var(--muted);line-height:1.65;font-size:1.05rem;margin:0 0 18px}
.fn-index{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 8px}
.fn-index a{padding:6px 12px;border:1px solid var(--line);border-radius:999px;background:var(--card);color:inherit;text-decoration:none;font-weight:700;font-size:.9rem}
.fn-tab{padding:clamp(22px,3vw,34px) 0;border-top:1px solid var(--line)}
.fn-tab:first-of-type{border-top:0}
.fn-tab h3{margin:0 0 8px;font:650 clamp(22px,2.4vw,28px)/1.2 var(--display)}
.fn-tab>p{margin:0 0 12px;color:var(--muted);line-height:1.6}
.fn-list{margin:0 0 14px;padding-left:1.2em;line-height:1.65}
.fn-list li{margin:5px 0}
.fn-body a,.fn-list a{color:inherit;text-decoration-thickness:2px;text-underline-offset:3px}
.fn-shots{display:flex;flex-wrap:wrap;gap:clamp(12px,1.6vw,20px);align-items:flex-start;margin-top:16px}
.fn-shots .shot{flex:1 1 320px;max-width:560px;min-width:0}
.fn-shots .shot.phone{flex:0 1 180px}
.example{margin:14px 0;padding:14px 16px;border-left:4px solid var(--ink);border-radius:0 12px 12px 0;background:var(--card)}
.example span{display:block;font-size:.78rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--muted);margin-bottom:4px}
.example p{margin:0;line-height:1.6}
.mob-grid{list-style:none;margin:0 0 12px;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:10px}
.mob-grid li{display:flex;gap:10px;padding:12px 14px;border:1px solid var(--line);border-radius:12px;background:var(--card)}
.mob-grid li>span{font-size:1.4rem;line-height:1}
.mob-grid p{margin:2px 0 0;color:var(--muted);line-height:1.5;font-size:.95rem}
.type-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:10px;margin:0 0 16px}
.type-card{padding:14px 16px;border:1px solid var(--line);border-radius:12px;background:var(--card)}
.type-card span{font-size:1.4rem;display:block;margin-bottom:6px}
.type-card p{margin:4px 0 0;color:var(--muted);line-height:1.5;font-size:.95rem}
.faq-two{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.faq-two p{margin:4px 0 12px!important}
/* Más funciones */
.features{display:grid}
.feature{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:clamp(20px,4vw,56px);padding:clamp(28px,4.5vw,60px) clamp(16px,3vw,40px);border-bottom:1px solid var(--line);align-items:start}
.feature:last-child{border-bottom:0}
.feature:nth-child(even){grid-template-columns:minmax(0,8fr) minmax(0,4fr)}
.feature:nth-child(even) .feature-text{order:2}
.feature .tag .game-ic{width:30px;height:30px;object-fit:contain;vertical-align:-9px;margin-right:6px;text-transform:none}
.feature .tag{display:block;margin-bottom:8px;color:var(--muted);font-weight:700;font-size:.82rem;letter-spacing:.04em;text-transform:uppercase}
.feature h3{margin:0 0 12px;font:650 clamp(23px,2.6vw,31px)/1.18 var(--display);letter-spacing:-.01em}
.feature p{margin:0 0 14px;color:var(--muted);line-height:1.65;font-size:1.04rem}
.feature ul{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.feature li{padding:10px 0;border-bottom:1px solid var(--line);font-weight:700;font-size:.95rem}
.feature-shots{display:flex;flex-wrap:wrap;gap:clamp(12px,1.6vw,20px);align-items:flex-start;justify-content:center}
.feature-shots .shot{flex:1 1 260px;min-width:0}
.feature-shots .shot.phone{flex:0 1 170px}
/* Ampliar imágenes */
.shot img{cursor:zoom-in;transition:transform .18s ease,box-shadow .18s ease}
.shot img:hover{transform:translateY(-2px);box-shadow:0 14px 36px rgba(29,42,68,.22)}
.shot img:focus-visible{outline:3px solid var(--ink);outline-offset:3px}
.lightbox{width:100vw;height:100dvh;max-width:none;max-height:none;margin:0;padding:clamp(10px,2vw,24px);border:0;background:rgba(10,16,30,.94);color:#fff;overflow:hidden}
.lightbox[open]{display:flex;align-items:center;justify-content:center}
.lightbox::backdrop{background:transparent}
.lightbox figure{margin:0;display:flex;flex-direction:column;align-items:center;gap:10px;min-width:0;max-width:100%}
.lightbox img{display:block;max-width:min(100%,1600px);max-height:calc(100dvh - 90px);width:auto;height:auto;background:#fff;border-radius:10px;cursor:zoom-out}
.lightbox figcaption{font-size:.95rem;text-align:center;max-width:70ch}
.lb-btn{position:absolute;z-index:1;display:grid;place-items:center;width:46px;height:46px;border:0;border-radius:50%;background:rgba(255,255,255,.16);color:#fff;font-size:24px;cursor:pointer}
.lb-btn:hover,.lb-btn:focus-visible{background:rgba(255,255,255,.32)}
.lb-close{top:12px;right:12px;font-size:18px}
.lb-prev{left:12px;top:50%;transform:translateY(-50%)}
.lb-next{right:12px;top:50%;transform:translateY(-50%)}
@keyframes rise{from{opacity:0;transform:translateY(8px)}}
.panel h3{margin:0 0 12px;font:650 clamp(23px,2.6vw,31px)/1.18 var(--display);letter-spacing:-.01em}
.panel p{margin:0;color:var(--muted);line-height:1.65;font-size:1.04rem}
.panel ul{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.panel li{padding:14px 0;border-bottom:1px solid var(--line);font-weight:700;font-size:1rem}
.grid-games{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,1fr)}
.grid-games li{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;min-height:158px;padding:18px 10px;text-align:center;font-weight:700;font-size:.98rem;border-right:1px solid var(--line);border-bottom:1px solid var(--line);transition:background .25s,transform .25s}
.grid-games li:nth-child(4n){border-right:0}
.grid-games li:last-child{grid-column:1/-1;border-right:0;border-bottom:0}
.grid-games b{font-size:2.3rem;font-weight:400;line-height:1;transition:transform .25s}
.grid-games li:hover{background:color-mix(in srgb,var(--marker) 26%,transparent)}
.grid-games li:hover b{transform:scale(1.14) rotate(-4deg)}
.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,1fr)}
.steps li{padding:clamp(22px,3vw,36px);border-right:1px solid var(--line)}
.steps li:last-child{border-right:0}
.steps span,.abc span{display:inline-grid;place-items:center;width:46px;height:46px;border:2px solid var(--accent);border-radius:52% 48% 55% 45%/48% 55% 45% 52%;font:700 22px var(--hand);color:var(--accent)}
.steps h3,.abc h3{margin:22px 0 10px;font:650 1.34rem/1.2 var(--display)}
.steps p,.abc p{margin:0;color:var(--muted);line-height:1.6;font-size:1rem}
.abc{display:grid;grid-template-columns:repeat(3,1fr)}
.abc>div{padding:clamp(22px,3vw,36px);border-right:1px solid var(--line)}
.abc>div:last-child{border-right:0}
.final{padding:clamp(70px,12vw,140px) 16px;text-align:center}
.eyebrow{margin:0 0 14px;font:700 13.5px var(--body);color:var(--muted)}
.final h2{margin:0 0 30px;font:750 clamp(40px,7vw,88px)/1.05 var(--display);letter-spacing:-.025em}
.foot{display:flex;align-items:center;gap:14px;flex-wrap:wrap;padding:20px var(--gutter);border-top:1px solid var(--line);font:400 13.5px var(--body);color:var(--muted)}
.foot img{border-radius:5px}
.foot span:last-child{margin-left:auto}
.ruler{position:fixed;right:0;top:var(--bar);bottom:0;width:18px;z-index:10;pointer-events:none;background:repeating-linear-gradient(to bottom,var(--line) 0 1px,transparent 1px 38px)}
.ruler span{position:absolute;right:0;width:18px;height:3px;border-radius:2px;background:var(--fx-2)}

@media(max-width:1100px){.fc{width:58px;height:58px}.fc b img{width:38px;height:38px}.c7,.c8,.c9,.c10,.c11{display:none}}
@media(max-width:820px){
  /* Barra superior en celular: logo, menú desplegable y tema. */
  .brand{flex:1;padding:0 14px;border-right:0}.brand img{height:24px}
  .menu-btn{display:flex;align-items:center}
  .top-cta{display:none}.ruler{display:none}
  .nav{position:absolute;top:var(--bar);left:0;right:0;flex-direction:column;align-items:stretch;gap:2px;padding:10px 14px 16px;max-height:calc(100svh - var(--bar));overflow-y:auto;background:var(--bg);border-bottom:1px solid var(--line);box-shadow:0 18px 30px var(--shadow);visibility:hidden;opacity:0;transform:translateY(-8px);transition:opacity .2s,transform .2s,visibility .2s}
  .top.open .nav{visibility:visible;opacity:1;transform:none}
  .nav .light-item{padding:12px 14px;font-size:16px;text-align:left}
  /* Efecto principal en celular: los íconos en cuadrícula debajo del texto. */
  .hero{flex-direction:column;justify-content:center;gap:26px;padding-top:36px;padding-bottom:40px}
  .hero-in{order:1}
  .float-cards{position:relative;inset:auto;order:2;display:flex;flex-wrap:wrap;justify-content:center;gap:10px;max-width:360px;pointer-events:auto}
  .fc{position:relative;left:auto!important;right:auto!important;top:auto!important;width:54px;height:54px;border-radius:15px;display:flex!important}
  .fc b{font-size:1.4rem}.fc b img{width:36px;height:36px}
  .fc{animation-name:driftS;animation-duration:6s}
  .fc .tip{display:none}
  .fc.sel{border-color:var(--fx-2);box-shadow:0 10px 24px var(--shadow),0 0 0 3px color-mix(in srgb,var(--fx-2) 35%,transparent)}
  .fc-info{order:3;display:block;max-width:360px;width:100%;padding:12px 14px;border-radius:14px;background:var(--ink);color:var(--bg);font:400 14px/1.45 var(--body);text-align:left;position:relative;z-index:2}
  .fc-info[hidden]{display:none}
  .fc-info strong{display:block;font:700 15px/1.3 var(--display);margin-bottom:2px}
  .fc-info a{display:inline-block;margin-top:6px;color:inherit;font-weight:700}
  .panel{grid-template-columns:1fr}.grid-games{grid-template-columns:repeat(2,1fr)}
  .guide-two{grid-template-columns:minmax(0,1fr)}.req-table tbody th{width:auto}
  .faq-two{grid-template-columns:minmax(0,1fr)}.fn-shots .shot.phone{flex:1 1 calc(50% - 10px);max-width:220px}
  .feature,.feature:nth-child(even){grid-template-columns:minmax(0,1fr)}.feature:nth-child(even) .feature-text{order:0}.feature-shots .shot{flex-basis:100%}.feature-shots .shot.phone{flex:1 1 calc(33% - 12px);min-width:90px;max-width:240px}
  .shots,.shots.three{grid-template-columns:minmax(0,1fr)}.shots.side{grid-template-columns:minmax(0,1fr)}.shots.side .phone{max-width:240px;margin-inline:auto}.shots.phones{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
  .grid-games li:nth-child(n){border-right:1px solid var(--line);border-bottom:1px solid var(--line)}.grid-games li:nth-child(2n){border-right:0}.grid-games li:last-child{border-bottom:0}
  .steps,.abc{grid-template-columns:1fr}.steps li,.abc>div{border-right:0;border-bottom:1px solid var(--line)}.steps li:last-child,.abc>div:last-child{border-bottom:0}
  .big.right{text-align:left}.foot span:last-child{margin-left:0}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .fc{animation:none}.panel{animation:none}
  .light-core,.light-tail,.light-glow{transition:none!important}
}

/* Logo EduOffline: versión clara u oscura según el tema */
.wordmark img{display:block;height:clamp(150px,26vw,250px);width:auto;max-width:100%;margin:0 auto}
.logo-d{display:none!important}
:root[data-theme="dark"] .logo-l{display:none!important}:root[data-theme="dark"] .logo-d{display:block!important}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .logo-l{display:none!important}:root:not([data-theme="light"]) .logo-d{display:block!important}}

/* Visor 3D de muestra (modelo3d.js) */
.m3d{display:grid;grid-template-columns:minmax(0,1fr) minmax(190px,240px);gap:14px;width:100%;background:var(--card);border:1px solid var(--line);border-radius:12px;box-shadow:0 10px 30px rgba(29,42,68,.14);padding:12px}
.m3d-fig{width:100%}
.m3d-stage{position:relative;min-height:380px;border-radius:9px;background:radial-gradient(circle at 50% 40%,#ffffff,#e9eef6);overflow:hidden}
:root[data-theme="dark"] .m3d-stage{background:radial-gradient(circle at 50% 40%,#2c5248,#16302a)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .m3d-stage{background:radial-gradient(circle at 50% 40%,#2c5248,#16302a)}}
.m3d-view{position:absolute;inset:0;width:100%;height:100%;--poster-color:transparent}
.m3d-status[hidden]{display:none}
.m3d-status{position:absolute;inset:0;margin:0;display:flex;align-items:center;justify-content:center;padding:16px;text-align:center;color:var(--muted);font-size:.92rem}
.m3d-side{display:flex;flex-direction:column;gap:10px;min-width:0}
.m3d-note{margin:0;font-size:.9rem;line-height:1.5;color:var(--muted);min-height:4.5em}
.m3d-note strong{color:var(--ink)}
.m3d-parts{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:4px}
.feature .m3d-parts{border:0}
.m3d-parts li,.feature .m3d-parts li{padding:0;border:0;font-weight:400}
.m3d-parts button{display:flex;align-items:center;gap:8px;width:100%;padding:6px 8px;border:1px solid transparent;border-radius:8px;background:none;color:var(--ink);font:inherit;font-size:.88rem;text-align:left;cursor:pointer}
.m3d-parts button:hover{background:color-mix(in srgb,var(--ink) 6%,transparent)}
.m3d-parts button[aria-pressed="true"]{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 12%,transparent);font-weight:700}
.m3d-swatch{flex:none;width:14px;height:14px;border-radius:50%;border:1px solid rgba(0,0,0,.2)}
@media (max-width:760px){
  .m3d{grid-template-columns:1fr}
  .m3d-stage{min-height:300px}
  .m3d-parts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}
  .m3d-note{min-height:0}
}