/* NexoMind V74 · sistema visual (logo: azul noche, violeta, celeste y ámbar).
   Capa final: se carga después de los estilos anteriores y no modifica bancos de contenido. */
@font-face{font-family:"Poppins";font-style:normal;font-weight:400;font-display:swap;src:url(assets/fonts/poppins-latin-400-normal.woff2) format("woff2")}
@font-face{font-family:"Poppins";font-style:normal;font-weight:500;font-display:swap;src:url(assets/fonts/poppins-latin-500-normal.woff2) format("woff2")}
@font-face{font-family:"Poppins";font-style:normal;font-weight:600;font-display:swap;src:url(assets/fonts/poppins-latin-600-normal.woff2) format("woff2")}
@font-face{font-family:"Poppins";font-style:normal;font-weight:700;font-display:swap;src:url(assets/fonts/poppins-latin-700-normal.woff2) format("woff2")}
@font-face{font-family:"Poppins";font-style:normal;font-weight:800;font-display:swap;src:url(assets/fonts/poppins-latin-800-normal.woff2) format("woff2")}
@font-face{font-family:"Nunito";font-style:normal;font-weight:400;font-display:swap;src:url(assets/fonts/nunito-latin-400-normal.woff2) format("woff2")}
@font-face{font-family:"Nunito";font-style:normal;font-weight:500;font-display:swap;src:url(assets/fonts/nunito-latin-500-normal.woff2) format("woff2")}
@font-face{font-family:"Nunito";font-style:normal;font-weight:600;font-display:swap;src:url(assets/fonts/nunito-latin-600-normal.woff2) format("woff2")}
@font-face{font-family:"Nunito";font-style:normal;font-weight:700;font-display:swap;src:url(assets/fonts/nunito-latin-700-normal.woff2) format("woff2")}
@font-face{font-family:"Nunito";font-style:normal;font-weight:800;font-display:swap;src:url(assets/fonts/nunito-latin-800-normal.woff2) format("woff2")}

:root{
  --nm-night-950:#080a24;--nm-night-900:#0f0d34;--nm-night-850:#151244;--nm-night-800:#1c1856;--nm-night-700:#28226f;--nm-night-600:#352d8a;
  --nm-violet-700:#5530c9;--nm-violet-600:#6a40e4;--nm-violet-500:#7c52f2;--nm-violet-400:#9b7bfa;--nm-violet-200:#d9ccff;--nm-violet-100:#ece6ff;--nm-violet-50:#f6f3ff;
  --nm-cyan-600:#0a8fc2;--nm-cyan-500:#18bbeb;--nm-cyan-400:#38d0f2;--nm-cyan-100:#d9f5fd;
  --nm-amber-600:#c98500;--nm-amber-500:#f5a70b;--nm-amber-400:#fbbf24;--nm-amber-100:#fff3cf;
  --nm-green-600:#14845e;--nm-green-500:#2fb98a;--nm-green-100:#dcf6ec;
  --nm-coral-600:#c4502c;--nm-coral-500:#ff8a65;--nm-coral-100:#ffe8df;
  --nm-ink:#1b1846;--nm-ink-2:#454273;--nm-ink-3:#625f8c;
  --nm-surface:#ffffff;--nm-surface-2:#f6f4ff;--nm-line:#e3def6;
  --nm-on-dark:#ffffff;--nm-on-dark-2:#cfcaf3;--nm-on-dark-3:#a49ed6;
  --nm-font-head:"Poppins",ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;
  --nm-font-body:"Nunito",ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;
  --nm-r-xl:28px;--nm-r-lg:22px;--nm-r-md:16px;--nm-r-sm:12px;
  --nm-shadow:0 18px 44px rgba(5,4,32,.34);--nm-shadow-soft:0 8px 22px rgba(20,16,72,.10);
  --nm-ease:cubic-bezier(.22,.8,.26,1);
  --nm-side:264px;
}

/* ───── Lienzo general ───── */
html{scroll-behavior:smooth}
body.nx74{
  font-family:var(--nm-font-body);color:var(--nm-ink);
  background:
    radial-gradient(1100px 620px at 92% -8%,rgba(124,82,242,.38),transparent 62%),
    radial-gradient(820px 520px at -12% 104%,rgba(24,187,235,.16),transparent 60%),
    linear-gradient(165deg,#0c0b2c 0%,#151244 52%,#1b1757 100%) fixed;
  background-color:var(--nm-night-900);
  -webkit-font-smoothing:antialiased;
}
body.nx74 :is(button,input,select,textarea){font-family:inherit}
body.nx74 :is(h1,h2,h3,h4){font-family:var(--nm-font-head)}
body.nx74 :is(button,a,input,select,textarea,[tabindex]):focus-visible{outline:3px solid var(--nm-amber-400);outline-offset:2px}
body.nx74 ::selection{background:var(--nm-violet-200);color:var(--nm-night-900)}

/* La estructura anterior queda oculta y funcional (otros módulos la siguen usando). */
body.nx74 .app>.side,body.nx74>.mobile,body.nx74 .mobile{display:none!important}
body.nx74 .nx-legacy-hidden{display:none!important}
body.nx74 #reviewModeBtn,body.nx74 #trialLogoutBtn,body.nx74 #n69MobileSubjects{display:none!important}
.nx-nav-group{margin:0}
.nx-side .nexo-lengua-final-open,.nx-sheet .nexo-lengua-final-open,.nx-tabbar .nexo-lengua-final-open{display:none!important}
body.nx74[data-nx-page="nexo70"] main>.top>div:first-child,body.nx74[data-nx-page^="n69"] main>.top>div:first-child{visibility:hidden;height:0;overflow:hidden}
body.nx74[data-nx-page="nexo70"] main>.top,body.nx74[data-nx-page^="n69"] main>.top{margin-bottom:12px}
.nx-nav-summary{display:flex;align-items:center;justify-content:space-between;gap:8px;list-style:none;cursor:pointer;border-radius:10px;padding:6px 2px 6px 0}
.nx-nav-summary::-webkit-details-marker{display:none}
.nx-nav-summary:hover{color:#fff}
.nx-chev{width:18px;height:18px;flex:none;transition:transform .2s var(--nm-ease)}
.nx-nav-group[open] .nx-chev{transform:rotate(180deg)}

body.nx74 .app{display:grid;grid-template-columns:var(--nm-side) minmax(0,1fr);min-height:100vh;min-height:100dvh}
body.nx74 main{padding:26px 34px 64px;min-width:0;max-width:1480px;width:100%;margin:0 auto}

/* ───── Barra lateral ───── */
.nx-side{position:sticky;top:0;height:100vh;height:100dvh;display:flex;flex-direction:column;gap:14px;padding:22px 14px 16px;background:rgba(8,10,36,.72);border-right:1px solid rgba(255,255,255,.07);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);z-index:40;overflow:hidden}
.nx-brand{display:flex;align-items:center;gap:10px;padding:2px 8px 8px;text-decoration:none;color:var(--nm-on-dark)}
.nx-brand img{width:44px;height:auto;flex:none;filter:drop-shadow(0 6px 14px rgba(124,82,242,.45))}
.nx-wordmark{font-family:var(--nm-font-head);font-weight:700;font-size:21px;letter-spacing:-.02em;color:#fff;line-height:1}
.nx-wordmark b{color:var(--nm-amber-400);font-weight:700}
.nx-nav{display:flex;flex-direction:column;gap:2px;overflow-y:auto;overscroll-behavior:contain;margin-right:-6px;padding-right:6px;scrollbar-width:thin;scrollbar-color:rgba(255,255,255,.18) transparent}
.nx-nav-label{text-align:left;margin:14px 10px 6px;font-size:11.5px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--nm-on-dark-3)}
.nx-nav-item{display:flex;align-items:center;gap:12px;width:100%;min-height:42px;padding:9px 12px;border:0;border-radius:var(--nm-r-sm);background:transparent;color:var(--nm-on-dark-2);font-size:15px;font-weight:700;text-align:left;cursor:pointer;transition:background .18s var(--nm-ease),color .18s var(--nm-ease)}
.nx-nav-item .nx-ic{width:21px;height:21px;flex:none;opacity:.9}
.nx-nav-item:hover{background:rgba(255,255,255,.07);color:#fff}
.nx-nav-item.is-active{background:linear-gradient(135deg,var(--nm-violet-500),var(--nm-violet-600));color:#fff;box-shadow:0 10px 24px rgba(106,64,228,.38),inset 0 1px 0 rgba(255,255,255,.18)}
.nx-nav-item.is-active .nx-ic{color:var(--nm-amber-400);opacity:1}
.nx-side-foot{margin-top:auto;padding-top:10px;border-top:1px solid rgba(255,255,255,.08);display:grid;gap:2px}
.nx-logout{color:var(--nm-on-dark-3)}
.nx-ic{display:inline-block;vertical-align:middle}

/* ───── Encabezado de página ───── */
body.nx74 main>.top{margin-bottom:22px;gap:16px;align-items:center}
body.nx74 main>.top h1{font-family:var(--nm-font-head);font-weight:700;font-size:clamp(26px,3.2vw,36px);letter-spacing:-.025em;color:#fff;line-height:1.15}
body.nx74 main>.top p{color:var(--nm-on-dark-2);font-size:15.5px;margin-top:4px}
body.nx74[data-nx-page="home"] main>.top>div:first-child{visibility:hidden;height:0;overflow:hidden}
body.nx74[data-nx-page="home"] main>.top{margin-bottom:12px}
body.nx74 main>.top .profile{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);box-shadow:none;color:#fff;border-radius:var(--nm-r-md);backdrop-filter:blur(10px)}
body.nx74 main>.top .profile b,body.nx74 main>.top .profile .meta{color:#fff}
body.nx74 main>.top .profile .meta div,body.nx74 main>.top .profile .meta span{color:var(--nm-on-dark-2)!important}
body.nx74 main>.top .profile a{color:var(--nm-cyan-400)!important}
body.nx74 main>.top .avatar{background:linear-gradient(135deg,var(--nm-amber-400),#ff8a65);color:var(--nm-night-900)}
body.nx74 main>.top button:not(.profile){background:rgba(255,255,255,.08);color:#fff;border:1px solid rgba(255,255,255,.14);border-radius:var(--nm-r-sm)}

/* Títulos que se colocan directamente sobre el fondo oscuro */
body.nx74 .page>.section h3,body.nx74 .page>.section h2{color:#fff}
body.nx74 .page>.section p{color:var(--nm-on-dark-2)}

/* ───── Componentes base ───── */
.nx-btn{display:inline-flex;align-items:center;gap:9px;min-height:46px;padding:11px 18px;border-radius:var(--nm-r-md);border:1px solid transparent;font-family:var(--nm-font-body);font-weight:800;font-size:15.5px;cursor:pointer;text-decoration:none;transition:transform .18s var(--nm-ease),box-shadow .18s var(--nm-ease),background .18s var(--nm-ease)}
.nx-btn .nx-ic{width:19px;height:19px}
.nx-btn:active{transform:translateY(1px) scale(.99)}
.nx-btn-amber{background:var(--nm-amber-400);color:#2b1d00;box-shadow:0 10px 24px rgba(251,191,36,.28)}
.nx-btn-amber:hover{background:#ffcb45;transform:translateY(-1px)}
.nx-btn-violet{background:var(--nm-violet-500);color:#fff;box-shadow:0 10px 22px rgba(124,82,242,.32)}
.nx-btn-violet:hover{background:var(--nm-violet-600);transform:translateY(-1px)}
.nx-btn-glass{background:rgba(255,255,255,.1);color:#fff;border-color:rgba(255,255,255,.2)}
.nx-btn-glass:hover{background:rgba(255,255,255,.16)}
.nx-btn-soft{background:var(--nm-violet-50);color:var(--nm-violet-700);border-color:var(--nm-violet-100)}
.nx-btn-soft:hover{background:var(--nm-violet-100)}
.nx-btn[disabled]{opacity:.55;cursor:not-allowed;transform:none}
.nx-eyebrow{margin:0;font-size:13px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;color:var(--nm-cyan-400)}
.nx-tone-violet{background:var(--nm-violet-100);color:var(--nm-violet-700)}
.nx-tone-cyan{background:var(--nm-cyan-100);color:var(--nm-cyan-600)}
.nx-tone-amber{background:var(--nm-amber-100);color:var(--nm-amber-600)}
.nx-tone-green{background:var(--nm-green-100);color:var(--nm-green-600)}

/* ───── Inicio ───── */
.nx-home{display:grid;gap:22px}
.nx-hello{position:relative;display:grid;grid-template-columns:minmax(0,1.25fr) minmax(220px,.75fr);align-items:center;gap:12px;padding:34px 36px;border-radius:var(--nm-r-xl);background:radial-gradient(600px 300px at 80% 30%,rgba(124,82,242,.55),transparent 70%),linear-gradient(135deg,#1d1960 0%,#2a2380 55%,#3a2d9c 100%);border:1px solid rgba(255,255,255,.1);box-shadow:var(--nm-shadow);overflow:hidden;color:#fff}
.nx-hello h2{margin:8px 0 10px;font-size:clamp(30px,4vw,46px);font-weight:700;letter-spacing:-.03em;line-height:1.08;color:#fff}
.nx-lead{margin:0;max-width:52ch;font-size:17px;line-height:1.6;color:var(--nm-on-dark-2)}
.nx-hello-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.nx-hello-art{width:100%;max-width:360px;justify-self:end;height:auto}
.nx-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.nx-stat{display:flex;align-items:center;gap:14px;padding:18px;border-radius:var(--nm-r-lg);background:var(--nm-surface);box-shadow:var(--nm-shadow-soft)}
.nx-stat-ic{display:grid;place-items:center;width:46px;height:46px;border-radius:14px;flex:none}
.nx-stat-ic .nx-ic{width:23px;height:23px}
.nx-stat>div{min-width:0;flex:1}
.nx-stat strong{display:block;font-family:var(--nm-font-head);font-size:26px;font-weight:700;line-height:1.1;color:var(--nm-ink);font-variant-numeric:tabular-nums}
.nx-stat strong span{font:inherit;color:inherit}
.nx-stat small{display:block;margin-top:2px;font-size:13.5px;color:var(--nm-ink-3);font-weight:600}
.nx-meter{display:block;margin-top:8px}
.nx-meter .bar,.nx-meter>i{display:block}
.nx-meter #xpBar{display:block;height:6px;border-radius:99px;background:linear-gradient(90deg,var(--nm-violet-500),var(--nm-cyan-500));max-width:100%}
.nx-meter.has-bar{height:6px;border-radius:99px;background:var(--nm-violet-100);overflow:hidden}
.nx-block{padding:24px;border-radius:var(--nm-r-xl);background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.08)}
.nx-block-head{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:6px 18px;margin-bottom:16px}
.nx-block-head h3{margin:0;font-size:22px;font-weight:700;color:#fff;letter-spacing:-.015em}
.nx-block-head p{margin:0;color:var(--nm-on-dark-2);font-size:15px}
.nx-subject-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px}
.nx-subject{position:relative;display:flex;align-items:flex-start;gap:14px;padding:16px 16px 18px;border:1px solid transparent;border-radius:var(--nm-r-lg);background:var(--nm-surface);text-align:left;cursor:pointer;box-shadow:var(--nm-shadow-soft);transition:transform .2s var(--nm-ease),box-shadow .2s var(--nm-ease),border-color .2s}
.nx-subject:hover{transform:translateY(-3px);box-shadow:0 18px 36px rgba(5,4,32,.3);border-color:var(--nm-violet-200)}
.nx-subject .nx-art{width:56px;height:56px;flex:none}
.nx-subject-body{display:grid;gap:3px;min-width:0;padding-right:22px}
.nx-subject-body b{font-family:var(--nm-font-head);font-size:17px;font-weight:700;color:var(--nm-ink);line-height:1.25}
.nx-subject-body small{font-size:12.5px;font-weight:800;color:var(--nm-violet-600);letter-spacing:.01em}
.nx-subject-body span{font-size:14px;line-height:1.45;color:var(--nm-ink-2)}
.nx-subject-go{position:absolute;right:14px;top:16px;color:var(--nm-violet-400);transition:transform .2s var(--nm-ease)}
.nx-subject-go .nx-ic{width:18px;height:18px}
.nx-subject:hover .nx-subject-go{transform:translateX(3px);color:var(--nm-violet-600)}
.nx-chiprow{display:flex;flex-wrap:wrap;gap:10px}
.nx-chip{min-height:42px;padding:9px 16px;border-radius:999px;border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.08);color:#fff;font-weight:700;font-size:14.5px;cursor:pointer;transition:background .18s}
.nx-chip:hover{background:rgba(255,255,255,.16)}

/* ───── Tarjetas heredadas sobre el fondo oscuro ───── */
body.nx74 .card,body.nx74 .workspace,body.nx74 .help{border-color:transparent;box-shadow:var(--nm-shadow-soft)}
body.nx74 .tool-fab{right:20px;bottom:20px;min-height:46px;padding:11px 16px;border-radius:var(--nm-r-md);background:var(--nm-night-700);border:1px solid rgba(255,255,255,.16);font-family:var(--nm-font-body);font-weight:800;font-size:14px;box-shadow:0 12px 30px rgba(0,0,0,.35)}
body.nx74 .whatsapp-fab{right:20px!important;bottom:20px!important;width:52px;height:52px;min-width:0!important;padding:0!important;border-radius:50%!important;display:grid!important;place-items:center;box-shadow:0 12px 28px rgba(0,0,0,.35)!important}
body.nx74 .whatsapp-fab .wa-label{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
body.nx74 .whatsapp-fab .wa-brand{margin:0!important}
body.nx74 .tool-fab{bottom:84px!important}
body.nx74:not([data-nx-page="courses"]):not([data-nx-page="lesson"]):not([data-nx-page="practice"]):not([data-nx-page="tasks"]):not([data-nx-page="evaluation"]):not([data-nx-page="notebook"]):not([data-nx-page="temas"]) .tool-fab{display:none!important}

/* Páginas embebidas (Ciencias, Français, Italiano, English CEFR) */
body.nx74 .n69-frame{display:block;width:100%;min-height:calc(100vh - 150px);min-height:calc(100dvh - 150px);border:0;border-radius:var(--nm-r-xl);background:#f6f4ff;box-shadow:var(--nm-shadow)}

/* ───── Hojas móviles ───── */
.nx-mbar,.nx-tabbar,.nx-sheet{display:none}
.nx-iconbtn{display:grid;place-items:center;width:44px;height:44px;border-radius:14px;border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.07);color:#fff;cursor:pointer}
.nx-iconbtn .nx-ic{width:22px;height:22px}

/* ───── Tablet: barra lateral compacta ───── */
@media (max-width:1180px) and (min-width:861px){
  :root{--nm-side:86px}
  .nx-side{padding:18px 10px;align-items:center}
  .nx-brand{padding:0 0 6px;justify-content:center}
  .nx-wordmark,.nx-nav-label{display:none}
  .nx-nav{margin:0;padding:0;align-items:center;width:100%}
  .nx-nav-item{justify-content:center;padding:10px;width:54px;min-height:46px}
  .nx-nav-item span{position:absolute;left:-9999px}
  .nx-side-foot{width:100%;justify-items:center}
  .nx-stats{grid-template-columns:repeat(2,minmax(0,1fr))}
  body.nx74 main{padding:24px 26px 64px}
}

/* ───── Móvil ───── */
@media (max-width:860px){
  body.nx74 .app{display:block}
  .nx-side{display:none}
  body.nx74 main{padding:14px 14px calc(96px + env(safe-area-inset-bottom))}
  body.nx74 main>.top{margin-bottom:14px}
  body.nx74 main>.top h1{font-size:25px}
  body.nx74 main>.top p{font-size:14.5px}
  body.nx74 main>.top .profile .meta{display:none}
  body.nx74 main>.top>div:last-child{display:none!important}
  body.nx74 .app{padding-top:calc(64px + env(safe-area-inset-top))}
  .nx-mbar{display:flex;align-items:center;justify-content:space-between;position:fixed;left:0;right:0;top:0;z-index:55;padding:10px 14px;padding-top:calc(10px + env(safe-area-inset-top));background:rgba(10,10,40,.86);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid rgba(255,255,255,.08)}
  .nx-mbar .nx-brand{padding:0}
  .nx-mbar .nx-brand img{width:36px}
  .nx-mbar .nx-wordmark{font-size:19px}
  .nx-tabbar{display:grid;grid-template-columns:repeat(5,1fr);position:fixed;left:10px;right:10px;bottom:calc(10px + env(safe-area-inset-bottom));z-index:60;padding:6px;border-radius:20px;background:rgba(14,12,48,.94);border:1px solid rgba(255,255,255,.1);box-shadow:0 16px 40px rgba(0,0,0,.45);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px)}
  .nx-tab{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;min-height:54px;padding:6px 2px;border:0;border-radius:14px;background:transparent;color:var(--nm-on-dark-3);font-size:12px;font-weight:800;cursor:pointer}
  .nx-tab .nx-ic{width:23px;height:23px}
  .nx-tab.is-active{color:#fff;background:rgba(124,82,242,.32)}
  .nx-tab.is-active .nx-ic{color:var(--nm-amber-400)}
  .nx-sheet{display:block;position:fixed;inset:0;z-index:90;background:rgba(4,4,20,.6);opacity:0;pointer-events:none;transition:opacity .22s var(--nm-ease)}
  .nx-sheet.is-open{opacity:1;pointer-events:auto}
  .nx-sheet-panel{position:absolute;left:0;right:0;bottom:0;max-height:86vh;max-height:86dvh;overflow:auto;padding:18px 16px calc(22px + env(safe-area-inset-bottom));border-radius:26px 26px 0 0;background:var(--nm-night-850);border-top:1px solid rgba(255,255,255,.12);transform:translateY(24px);transition:transform .28s var(--nm-ease)}
  .nx-sheet.is-open .nx-sheet-panel{transform:none}
  .nx-sheet-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}
  .nx-sheet-head h2{margin:0;color:#fff;font-size:20px}
  .nx-sheet-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
  .nx-sheet-subject{display:grid;justify-items:center;gap:6px;padding:12px 6px;border-radius:18px;border:1px solid rgba(255,255,255,.08);background:rgba(255,255,255,.05);color:#fff;font-weight:800;font-size:13.5px;cursor:pointer}
  .nx-sheet-subject .nx-art{width:48px;height:48px}
  .nx-sheet-subject.is-active{border-color:var(--nm-violet-400);background:rgba(124,82,242,.25)}
  .nx-sheet-list{display:grid;gap:2px}
  body.nx-sheet-open{overflow:hidden}
  .nx-hello{grid-template-columns:1fr;padding:24px 20px 0;gap:0}
  .nx-hello h2{font-size:30px}
  .nx-lead{font-size:16px}
  .nx-hello-actions .nx-btn{flex:1 1 auto;justify-content:center}
  .nx-hello-art{justify-self:center;max-width:280px;margin-top:8px}
  .nx-stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
  .nx-stat{padding:14px;gap:10px;flex-direction:column;align-items:flex-start}
  .nx-stat strong{font-size:22px}
  .nx-block{padding:16px;border-radius:var(--nm-r-lg)}
  .nx-subject-grid{grid-template-columns:1fr}
  body.nx74 .tool-fab{right:14px;bottom:calc(150px + env(safe-area-inset-bottom))!important}
  body.nx74 .whatsapp-fab{right:14px!important;bottom:calc(88px + env(safe-area-inset-bottom))!important;width:48px;height:48px}
  body.nx74 .n69-frame{border-radius:var(--nm-r-lg);min-height:calc(100dvh - 210px)}
}
@media (prefers-reduced-motion:reduce){
  body.nx74 *{transition:none!important;animation:none!important;scroll-behavior:auto!important}
}

/* ═════════ Materias: Sociales, Historia, Filosofía, Robótica ═════════ */
.ax,.ax-main,.ax-stage,.ax-guide{grid-template-columns:minmax(0,1fr)}
.ax{--ax-accent:var(--nm-violet-500);--ax-accent-2:var(--nm-violet-600);--ax-soft:var(--nm-violet-50);--ax-ink:var(--nm-violet-700);display:grid;gap:16px;color:var(--nm-ink)}
.ax-tone-cyan{--ax-accent:#0fa7d8;--ax-accent-2:#0a8fc2;--ax-soft:#e8f8fd;--ax-ink:#06698f}
.ax-tone-amber{--ax-accent:#e39a07;--ax-accent-2:#c98500;--ax-soft:#fff6dc;--ax-ink:#8a5a00}
.ax-hero{position:relative;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px;padding:26px 28px;border-radius:var(--nm-r-xl);color:#fff;overflow:hidden;
  background:radial-gradient(520px 260px at 90% 10%,color-mix(in srgb,var(--ax-accent) 55%,transparent),transparent 70%),linear-gradient(135deg,#1d1960,#2a2380 60%,#33298f);border:1px solid rgba(255,255,255,.1);box-shadow:var(--nm-shadow)}
.ax-hero-copy{max-width:640px;min-width:0}
.ax-eyebrow{margin:0 0 6px;font-size:12.5px;font-weight:800;letter-spacing:.05em;text-transform:uppercase;color:var(--nm-cyan-400)}
.ax-hero h2{margin:0;font-size:clamp(28px,3.4vw,40px);font-weight:700;letter-spacing:-.025em;color:#fff}
.ax-hero-copy>p:not(.ax-eyebrow){margin:6px 0 0;color:var(--nm-on-dark-2);font-size:16px}
.ax-hero-controls{display:flex;flex-wrap:wrap;align-items:center;gap:10px 16px;margin-top:16px}
.ax-select{display:inline-flex;align-items:center;gap:10px;padding:5px 6px 5px 14px;border-radius:14px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18)}
.ax-select span{font-size:13px;font-weight:800;color:var(--nm-on-dark-2)}
.ax-select select{min-height:38px;padding:6px 32px 6px 12px;border-radius:10px;border:0;background:#fff;color:var(--nm-ink);font-weight:800;font-size:15px}
.ax-link{display:inline-flex;align-items:center;gap:6px;color:var(--nm-cyan-400);font-weight:700;font-size:14px;text-decoration:none}
.ax-link .nx-ic{width:16px;height:16px}
.ax-link:hover{text-decoration:underline}
.ax-hero-side{display:flex;align-items:center;gap:18px}
.ax-hero-art{width:112px;height:112px;filter:drop-shadow(0 12px 24px rgba(0,0,0,.35))}
.ax-hero-progress{display:flex;align-items:center;gap:14px;padding:12px 16px;border-radius:18px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);color:#fff}
.ax-hero-progress strong{display:block;font-family:var(--nm-font-head);font-size:22px}
.ax-hero-progress small{color:var(--nm-on-dark-2);font-size:13px}
.ax-ring{flex:none;color:#fff}
.ax-note{margin:0;padding:12px 16px;border-radius:14px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);color:var(--nm-on-dark-2);font-size:14px;line-height:1.55}
.ax-layout{display:grid;grid-template-columns:300px minmax(0,1fr);gap:18px;align-items:start}
.ax-rail{position:sticky;top:18px;padding:16px 12px;border-radius:var(--nm-r-lg);background:var(--nm-surface);box-shadow:var(--nm-shadow-soft);max-height:calc(100vh - 36px);overflow:auto}
.ax-rail-title{margin:0 8px 10px;font-size:12.5px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;color:var(--nm-ink-3)}
.ax-rail ol{list-style:none;margin:0;padding:0;display:grid;gap:4px}
.ax-topic{display:flex;align-items:center;gap:12px;width:100%;padding:11px 10px;border:1px solid transparent;border-radius:14px;background:transparent;text-align:left;cursor:pointer;color:var(--nm-ink);transition:background .18s,border-color .18s}
.ax-topic:hover{background:var(--nm-surface-2)}
.ax-topic.is-active{background:var(--ax-soft);border-color:color-mix(in srgb,var(--ax-accent) 35%,transparent)}
.ax-topic-num{display:grid;place-items:center;flex:none;width:32px;height:32px;border-radius:10px;background:var(--nm-surface-2);font-family:var(--nm-font-head);font-weight:700;font-size:14px;color:var(--ax-ink)}
.ax-topic.is-active .ax-topic-num{background:var(--ax-accent);color:#fff}
.ax-topic-txt{display:grid;gap:2px;min-width:0;flex:1}
.ax-topic-txt b{font-size:14.5px;line-height:1.3;font-weight:800}
.ax-topic-txt small{font-size:12px;color:var(--nm-ink-3);font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ax-topic-st{flex:none;width:22px;height:22px;border-radius:50%;display:grid;place-items:center}
.ax-st-new{border:2px solid var(--nm-line)}
.ax-st-doing{border:2px solid var(--ax-accent);background:radial-gradient(circle,var(--ax-accent) 0 3.5px,transparent 4px)}
.ax-st-done{background:var(--nm-green-500);color:#fff}
.ax-st-done .nx-ic{width:14px;height:14px;stroke-width:3}
.ax-main{display:grid;gap:16px;padding:24px;border-radius:var(--nm-r-xl);background:var(--nm-surface);box-shadow:var(--nm-shadow-soft);min-width:0}
.ax-lesson-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;scroll-margin-top:90px}
.ax-kicker{margin:0;font-size:13px;font-weight:800;color:var(--ax-ink);letter-spacing:.02em}
.ax-lesson-head h3{margin:4px 0 6px;font-size:clamp(23px,2.6vw,30px);font-weight:700;letter-spacing:-.02em;line-height:1.2;color:var(--nm-ink);text-wrap:balance}
.ax-objective{margin:0;max-width:70ch;color:var(--nm-ink-2);font-size:15.5px;line-height:1.55}
.ax-listen{flex:none;display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:9px 14px;border-radius:14px;border:1px solid var(--nm-line);background:var(--nm-surface);color:var(--ax-ink);font-weight:800;cursor:pointer}
.ax-listen:hover{background:var(--ax-soft)}
.ax-listen .nx-ic{width:20px;height:20px}
.ax-figure{margin:0;border-radius:20px;overflow:hidden;background:var(--nm-surface-2);aspect-ratio:2/1}
.ax-figure img{display:block;width:100%;height:100%;object-fit:cover}
.ax-figure.is-missing{display:none}
.ax-tabs{position:relative;display:flex;flex-wrap:wrap;gap:6px;overflow-x:auto;padding:6px;border-radius:16px;background:var(--nm-surface-2);scrollbar-width:none;scroll-behavior:smooth}
.ax-tabs::-webkit-scrollbar{display:none}
.ax-tab{flex:0 0 auto;display:inline-flex;align-items:center;gap:7px;min-height:42px;padding:8px 13px;border:0;border-radius:12px;background:transparent;color:var(--nm-ink-2);font-weight:800;font-size:14px;cursor:pointer;white-space:nowrap}
.ax-tab .nx-ic{width:18px;height:18px}
.ax-tab:hover{background:#fff;color:var(--nm-ink)}
.ax-tab.is-active{background:var(--ax-accent);color:#fff;box-shadow:0 6px 16px color-mix(in srgb,var(--ax-accent) 35%,transparent)}
.ax-tab.is-done:not(.is-active) .nx-ic{color:var(--nm-green-600)}
.ax-stage{display:grid;gap:14px;scroll-margin-top:84px}
.ax-guide{display:grid;gap:14px}
.ax-card{padding:20px;border-radius:18px;background:var(--nm-surface);border:1px solid var(--nm-line)}
.ax-card h4{display:flex;align-items:center;gap:9px;margin:0 0 10px;font-size:17px;font-weight:700;color:var(--nm-ink)}
.ax-card h4 .nx-ic{width:20px;height:20px;color:var(--ax-accent)}
.ax-read{background:var(--ax-soft);border-color:transparent}
.ax-read p{margin:0 0 10px;font-size:17px;line-height:1.7;max-width:72ch;color:var(--nm-ink)}
.ax-read p:last-child{margin:0}
.ax-kids .ax-read p{font-size:19px;line-height:1.75}
.ax-grid2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.ax-keys{margin:0;padding:0;list-style:none;display:grid;gap:8px}
.ax-keys li{position:relative;padding-left:22px;font-size:15.5px;line-height:1.5;color:var(--nm-ink)}
.ax-keys li::before{content:"";position:absolute;left:4px;top:.6em;width:8px;height:8px;border-radius:3px;background:var(--ax-accent)}
.ax-example{background:linear-gradient(135deg,#fff8e6,#fff);border-color:#f5e1a8}
.ax-example h4 .nx-ic{color:var(--nm-amber-600)}
.ax-example p{margin:0;font-size:15.5px;line-height:1.6}
.ax-vocab{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin:0}
.ax-vocab div{padding:12px 14px;border-radius:14px;background:var(--nm-surface-2)}
.ax-vocab dt{font-weight:800;color:var(--ax-ink);font-size:15px}
.ax-vocab dd{margin:4px 0 0;font-size:14.5px;line-height:1.45;color:var(--nm-ink-2)}
.ax-cta{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 16px;padding:14px 16px;border-radius:16px;background:var(--nm-night-800);color:#fff}
.ax-cta p{margin:0;font-weight:700}
.ax-muted{margin:0 0 10px;color:var(--nm-ink-3);font-size:14.5px;line-height:1.5}
.ax-question{margin:0 0 14px;font-size:18px;font-weight:700;line-height:1.45;color:var(--nm-ink);max-width:70ch}
.ax-kids .ax-question{font-size:20px}
.ax-quiz-head{display:flex;align-items:center;justify-content:space-between;gap:10px}
.ax-quiz-head h4{margin:0}
.ax-dots{display:inline-flex;gap:6px}
.ax-dots i{width:10px;height:10px;border-radius:50%;background:var(--nm-line)}
.ax-dots i.on{background:var(--ax-accent)}
.ax-dots i.ok{background:var(--nm-green-500)}
.ax-options{display:grid;gap:10px}
.ax-option{display:flex;align-items:center;gap:12px;width:100%;min-height:54px;padding:10px 14px;border:2px solid var(--nm-line);border-radius:14px;background:#fff;text-align:left;font-size:16px;font-weight:700;color:var(--nm-ink);cursor:pointer;transition:border-color .15s,background .15s,transform .15s}
.ax-option:hover:not(:disabled){border-color:var(--ax-accent);background:var(--ax-soft)}
.ax-option:active:not(:disabled){transform:scale(.99)}
.ax-letter{display:grid;place-items:center;flex:none;width:30px;height:30px;border-radius:9px;background:var(--nm-surface-2);font-family:var(--nm-font-head);font-weight:700;font-size:14px;color:var(--ax-ink)}
.ax-option.is-right{border-color:var(--nm-green-500);background:var(--nm-green-100)}
.ax-option.is-right .ax-letter{background:var(--nm-green-500);color:#fff}
.ax-option.is-wrong{border-color:#f0a2a2;background:#fff1f1;color:#8a2d2d;opacity:.8}
.ax-option:disabled{cursor:default}
.ax-feedback{display:none;margin-top:12px;padding:12px 14px;border-radius:14px;font-size:15px;line-height:1.5;font-weight:600}
.ax-feedback.is-show{display:block}
.ax-feedback.good{background:var(--nm-green-100);color:#0d5f43}
.ax-feedback.warn{background:#fff3dc;color:#7a4b00}
.ax-feedback.info{background:var(--nm-cyan-100);color:#05587a}
.ax-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
.ax-result{display:flex;align-items:center;gap:20px}
.ax-result h4{margin:0 0 6px}
.ax-result p{margin:0;color:var(--nm-ink-2)}
.ax-result .ax-ring{color:var(--nm-ink)}
.ax-big-ic{width:56px;height:56px;padding:12px;border-radius:50%;background:var(--nm-green-100);color:var(--nm-green-600);flex:none}
.ax-locked{text-align:center;display:grid;justify-items:center;gap:6px}
.ax-locked>.nx-ic{width:44px;height:44px;padding:10px;border-radius:14px;background:var(--nm-surface-2);color:var(--nm-ink-3)}
.ax-sort{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.ax-sort li{display:flex;align-items:center;gap:12px;padding:8px 8px 8px 12px;border-radius:14px;background:var(--nm-surface-2);border:1px solid var(--nm-line)}
.ax-sort-n{display:grid;place-items:center;flex:none;width:28px;height:28px;border-radius:50%;background:var(--ax-accent);color:#fff;font-weight:800;font-size:13px}
.ax-sort-t{flex:1;font-weight:700;font-size:15.5px;line-height:1.35}
.ax-sort-btns{display:flex;gap:6px}
.ax-sort-btns button{width:44px;height:44px;border-radius:12px;border:1px solid var(--nm-line);background:#fff;font-size:18px;font-weight:800;color:var(--ax-ink);cursor:pointer}
.ax-sort-btns button:hover:not(:disabled){background:var(--ax-soft)}
.ax-sort-btns button:disabled{opacity:.35;cursor:default}
.ax-steps{list-style:none;margin:0 0 14px;padding:0;display:flex;flex-wrap:wrap;gap:8px}
.ax-steps li{display:inline-flex;align-items:center;gap:8px;padding:7px 12px 7px 7px;border-radius:999px;background:var(--nm-surface-2);font-weight:700;font-size:14px}
.ax-steps li span{display:grid;place-items:center;width:24px;height:24px;border-radius:50%;background:var(--ax-accent);color:#fff;font-size:12px}
.ax-label{display:block;margin:4px 0 6px;font-weight:800;font-size:14px;color:var(--nm-ink-2)}
.ax textarea,.ax input[type=number],.ax select{font:inherit}
.ax textarea{width:100%;min-height:120px;padding:12px 14px;border-radius:14px;border:2px solid var(--nm-line);background:#fff;color:var(--nm-ink);font-size:16px;line-height:1.55;resize:vertical}
.ax textarea:focus{outline:none;border-color:var(--ax-accent);box-shadow:0 0 0 4px color-mix(in srgb,var(--ax-accent) 18%,transparent)}
.ax-pager{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;padding-top:6px;border-top:1px solid var(--nm-line)}
.ax-empty{display:grid;justify-items:center;gap:8px;padding:40px 24px;border-radius:var(--nm-r-xl);background:var(--nm-surface);text-align:center}
.ax-empty>.nx-ic{width:48px;height:48px;padding:11px;border-radius:16px;background:var(--nm-surface-2);color:var(--nm-ink-3)}
.ax-empty h3{margin:4px 0 0;color:var(--nm-ink)}
.ax-empty p{margin:0 0 8px;max-width:48ch;color:var(--nm-ink-2)}
/* Laboratorio */
.ax-lab-wrap{display:grid;grid-template-columns:minmax(0,1fr) minmax(220px,300px);gap:18px;align-items:start}
.ax-grid{display:grid;grid-template-columns:repeat(var(--n),1fr);gap:5px;padding:8px;border-radius:16px;background:#e9e6fb;max-width:440px;width:100%;aspect-ratio:1}
.ax-cell{display:grid;place-items:center;border-radius:9px;background:#fff;aspect-ratio:1}
.ax-cell svg{width:78%;height:78%}
.ax-cell.is-rock{background:#d9d5f2}
.ax-cell.is-goal{background:#fff3cf}
.ax-cell.is-bot{background:var(--ax-soft);box-shadow:inset 0 0 0 2px var(--ax-accent)}
.ax-pad{display:grid;grid-template-columns:repeat(3,56px);gap:6px;justify-content:start;margin-bottom:12px}
.ax-pad button{width:56px;height:56px;border-radius:14px;border:0;background:var(--ax-accent);color:#fff;font-size:24px;font-weight:800;cursor:pointer;box-shadow:0 6px 14px color-mix(in srgb,var(--ax-accent) 30%,transparent)}
.ax-pad button:active{transform:translateY(1px)}
.ax-program{display:flex;flex-wrap:wrap;gap:5px;min-height:44px;padding:8px;border-radius:12px;background:var(--nm-surface-2);border:1px dashed var(--nm-line)}
.ax-program span{display:grid;place-items:center;width:30px;height:30px;border-radius:8px;background:#fff;font-weight:800;color:var(--ax-ink);border:1px solid var(--nm-line)}
.ax-program em{color:var(--nm-ink-3);font-size:14px;align-self:center}
.ax-sensor-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:12px}
.ax-sensor-grid label{display:grid;gap:6px;font-weight:800;font-size:14px;color:var(--nm-ink-2)}
.ax-sensor-grid select,.ax-sensor-grid input[type=number]{min-height:44px;padding:8px 10px;border-radius:12px;border:2px solid var(--nm-line);background:#fff;color:var(--nm-ink)}
.ax-sensor-grid input[type=range]{width:100%;accent-color:var(--ax-accent)}
/* Explorador */
.ax-map-wrap{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(220px,1fr);gap:16px;align-items:start}
.ax-map-svg{width:100%;height:auto;border-radius:16px;display:block}
.ax-reg{stroke:#fff;stroke-width:1.5;cursor:pointer;transition:filter .18s,opacity .18s}
.ax-reg-costa{fill:#ffd27a}.ax-reg-sierra{fill:#b9a3ff}.ax-reg-amazonia{fill:#7fd6a8}.ax-reg-insular{fill:#ff9f80;stroke:#1d1858;stroke-width:1}
.ax-reg:hover{filter:brightness(1.06)}
.ax-reg.is-on{filter:drop-shadow(0 0 0 #1d1858) brightness(1.08);stroke:#1d1858;stroke-width:3}
.ax-map-label{font:800 15px var(--nm-font-head);fill:#1b1846;paint-order:stroke;stroke:#fff;stroke-width:4px}
.ax-map-city{font:700 12px var(--nm-font-body);fill:#1b1846;paint-order:stroke;stroke:#fff;stroke-width:3px}
.ax-map-sea{font:italic 600 13px var(--nm-font-body);fill:#4f87b0}
.ax-chips{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}
.ax-chip{min-height:42px;padding:8px 14px;border-radius:999px;border:2px solid var(--nm-line);background:#fff;font-weight:800;color:var(--nm-ink);cursor:pointer}
.ax-chip.is-on{border-color:var(--ax-accent);background:var(--ax-soft);color:var(--ax-ink)}
.ax-region-info{padding:14px;border-radius:14px;background:var(--nm-surface-2);min-height:120px}
.ax-region-info h5{margin:0 0 6px;font-size:16px;font-family:var(--nm-font-head)}
.ax-region-info p{margin:0;line-height:1.55;color:var(--nm-ink-2)}
.ax-caption{margin:10px 0 0;font-size:12.5px;color:var(--nm-ink-3)}
.ax-sources{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.ax-sources li{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px 12px;padding:10px 12px;border-radius:14px;background:var(--nm-surface-2);border:2px solid transparent}
.ax-sources li.is-ok{border-color:var(--nm-green-500);background:var(--nm-green-100)}
.ax-sources li.is-no{border-color:#f0b4a2}
.ax-sources li>span:first-child{flex:1 1 260px;font-weight:700;line-height:1.4}
.ax-src-btns{display:flex;gap:6px}
.ax-src-btns button{min-height:40px;padding:6px 12px;border-radius:10px;border:1px solid var(--nm-line);background:#fff;font-weight:800;color:var(--ax-ink);cursor:pointer}
.ax-argmap{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.ax-arg{padding:12px;border-radius:14px;background:var(--nm-surface-2);border:1px solid var(--nm-line)}
.ax-arg-objecion{border-left-color:var(--nm-amber-500)}
.ax-arg-respuesta{border-left-color:var(--nm-green-500)}
.ax-arg label{display:block;margin-bottom:6px;font-weight:800;font-size:14px}
.ax-arg textarea{min-height:84px}

@media (max-width:1180px){.ax-layout{grid-template-columns:250px minmax(0,1fr)}.ax-vocab{grid-template-columns:1fr}.ax-lab-wrap,.ax-map-wrap{grid-template-columns:1fr}}
@media (max-width:860px){
  .ax-hero{padding:20px 18px;border-radius:var(--nm-r-lg)}
  .ax-hero-progress{width:100%}
  .ax-layout{grid-template-columns:minmax(0,1fr)}
  .ax-tabs{flex-wrap:nowrap}
  .ax-hero-art{display:none}
  .ax-rail{position:static;max-height:none;padding:10px;border-radius:18px;overflow:visible}
  .ax-rail ol{display:flex;gap:8px;overflow-x:auto;scroll-snap-type:x mandatory;padding-bottom:4px;scrollbar-width:none}
  .ax-rail ol::-webkit-scrollbar{display:none}
  .ax-rail li{flex:0 0 78%;scroll-snap-align:start}
  .ax-topic{background:var(--nm-surface-2);height:100%}
  .ax-main{padding:16px;border-radius:var(--nm-r-lg)}
  .ax-lesson-head{flex-direction:column}
  .ax-listen{align-self:flex-start}
  .ax-figure{border-radius:14px;aspect-ratio:2/1}
  .ax-grid2,.ax-argmap{grid-template-columns:1fr}
  .ax-card{padding:16px}
  .ax-read p{font-size:16.5px}
  .ax-question{font-size:17px}
  .ax-sort-t{font-size:15px}
  .ax-pager .nx-btn{flex:1 1 140px;justify-content:center}
  .ax-result{flex-direction:column;text-align:center}
}

/* Panel matemático oculto (también para teclado y lectores) mientras está cerrado */
body.nx74 .toolpanel:not(.open){visibility:hidden;transition:right .35s,visibility 0s .35s}
body.nx74 .toolpanel.open{visibility:visible;transition:right .35s}

/* Ampliar ilustraciones de las áreas */
.ax-figure img{cursor:zoom-in}
.nx-zoom{position:fixed;inset:0;z-index:200;background:rgba(8,10,36,.88);display:flex;align-items:center;justify-content:center;padding:16px}
.nx-zoom img{max-width:min(1200px,100%);max-height:100%;width:auto;height:auto;border-radius:16px;background:#fff;box-shadow:0 30px 60px rgba(0,0,0,.45)}
.nx-zoom button{position:absolute;top:calc(14px + env(safe-area-inset-top));right:14px;width:46px;height:46px;border-radius:50%;border:0;background:#fff;color:var(--nm-ink);font-size:24px;font-weight:800;cursor:pointer}
.nx-zoom button:focus-visible{outline:3px solid var(--nm-amber-400);outline-offset:2px}
@media (max-width:640px){.nx-zoom{padding:8px}.nx-zoom img{flex:none;max-width:none;max-height:none;width:auto;height:92vw;transform:rotate(90deg)}}