/* =============================================================
   FONDARIUM · EDUCACIÓN — hoja compartida por todas las lecciones
   Misma paleta que el sitio: azul noche + oro. La manzana trae
   su rojo propio, nada más ella.
   ============================================================= */
*{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg:#06101e; --bg2:#0a1628; --bg3:#0d1c35;
  --gold:#C09A5A; --gold-l:#D4AF72; --gold-dim:rgba(192,154,90,.18); --gold-dim2:rgba(192,154,90,.35);
  --text:#F0EDE8; --text2:#9AA3B0; --text3:#6B7380;
  --apple:#D2483C; --apple-d:#9E2F27; --leaf:#5E9C5A; --ice:#86B4E6; --hot:#E86B4F; --cold:#6FA8E8;
  --serif:'Cormorant Garamond',Georgia,serif; --sans:'Inter',-apple-system,sans-serif;
  --ease:cubic-bezier(.22,.61,.36,1); --out:cubic-bezier(.16,1,.3,1);
  --pad:clamp(20px,5vw,72px); --w:1120px;
}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:var(--sans);font-weight:300;overflow-x:hidden;-webkit-font-smoothing:antialiased}
img,svg{max-width:100%;display:block}
a{color:inherit}
::selection{background:rgba(192,154,90,.3)}
.lnum{font-variant-numeric:lining-nums;font-feature-settings:"lnum" 1}

/* ---------- nav (calcada del sitio) ---------- */
#nav{position:fixed;top:0;left:0;right:0;z-index:800;padding:20px var(--pad);display:flex;align-items:center;justify-content:space-between;
  border-bottom:1px solid transparent;transition:background .5s var(--ease),border-color .5s var(--ease),padding .5s var(--ease)}
#nav.solid{padding:14px var(--pad);background:rgba(6,16,30,.93);backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);border-color:var(--gold-dim)}
.nav-logo{display:flex;align-items:center;gap:13px;text-decoration:none}
.nav-logo-d{width:38px;height:38px;border-radius:50%;border:1px solid var(--gold-dim2);display:grid;place-items:center;flex-shrink:0}
.nav-logo-d span{font-family:var(--serif);font-size:1.15rem;color:var(--gold);line-height:1}
.nav-logo-text{display:flex;flex-direction:column;line-height:1.25}
.nav-logo-name{font-family:var(--serif);font-size:.95rem;letter-spacing:.25em}
.nav-logo-sub{font-size:.5rem;letter-spacing:.2em;text-transform:uppercase;color:var(--text3)}
.nav-links{display:flex;gap:36px;list-style:none}
.nav-links a{color:var(--text2);text-decoration:none;font-size:.64rem;letter-spacing:.16em;text-transform:uppercase;position:relative;transition:color .3s}
.nav-links a:hover,.nav-links a.active{color:var(--text)}
.nav-links a.active::after{content:'';position:absolute;left:0;right:0;bottom:-5px;height:1px;background:var(--gold)}
.nav-btn{display:flex;align-items:center;gap:9px;padding:11px 22px;border:1px solid var(--gold-dim2);border-radius:999px;color:var(--gold);
  font-size:.58rem;letter-spacing:.16em;text-transform:uppercase;text-decoration:none;transition:all .3s}
.nav-btn:hover{background:rgba(192,154,90,.07);border-color:var(--gold)}
.nav-btn svg{width:14px;height:14px}
.nav-hamburger{display:none;flex-direction:column;gap:5px;background:none;border:0;padding:8px;cursor:pointer;z-index:960}
.nav-hamburger span{display:block;width:22px;height:1.5px;background:var(--gold);transition:all .3s var(--ease)}
.nav-hamburger.open span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.nav-hamburger.open span:nth-child(2){opacity:0}
.nav-hamburger.open span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}

/* ---------- tipografía ---------- */
.kicker{font-size:.6rem;letter-spacing:.4em;text-transform:uppercase;color:var(--gold)}
.mega,.huge,.big,.cap-n{font-variant-numeric:lining-nums;font-feature-settings:"lnum" 1}
.mega{font-family:var(--serif);font-weight:300;line-height:.98;font-size:clamp(2.9rem,10vw,7rem);letter-spacing:-.01em}
.mega em,.huge em,.big em{font-style:italic;color:var(--gold-l)}
.huge{font-family:var(--serif);font-weight:300;line-height:1.05;font-size:clamp(2.2rem,7vw,4.6rem)}
.big{font-family:var(--serif);font-weight:300;line-height:1.2;font-size:clamp(1.55rem,4.4vw,2.6rem)}
.say{font-size:clamp(1.02rem,2.3vw,1.18rem);line-height:1.85;color:var(--text2)}
.say strong{color:var(--text);font-weight:500}
.say+.say{margin-top:20px}
.tiny{font-size:.72rem;line-height:1.7;color:var(--text3)}
.red{color:var(--apple)} .gold{color:var(--gold-l)} .hot{color:var(--hot)} .cold{color:var(--cold)}

/* ---------- estructura ---------- */
section{padding:clamp(70px,11vh,130px) var(--pad);position:relative}
.wrap{max-width:var(--w);margin:0 auto}
.narrow{max-width:760px;margin:0 auto}
.center{text-align:center}
.alt{background:var(--bg2)}
.line-top{border-top:1px solid var(--gold-dim)}

/* capítulo */
.cap{display:flex;align-items:baseline;gap:18px;margin-bottom:26px}
.cap-n{font-family:var(--serif);font-size:clamp(3.4rem,9vw,6rem);line-height:.8;color:var(--gold);font-variant-numeric:lining-nums;font-feature-settings:"lnum" 1}
.cap-t{font-size:.6rem;letter-spacing:.3em;text-transform:uppercase;color:var(--text3)}

/* dos columnas: texto + ilustración */
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(30px,6vw,80px);align-items:center}
.split.rev>:first-child{order:2}

/* ilustración en tarjeta */
.scene{border:1px solid var(--gold-dim);border-radius:24px;background:radial-gradient(ellipse at 50% 20%,rgba(192,154,90,.08),transparent 60%),var(--bg3);
  padding:clamp(16px,3vw,28px);overflow:hidden;position:relative}
.scene figcaption{margin-top:14px;font-size:.6rem;letter-spacing:.2em;text-transform:uppercase;color:var(--text3);text-align:center}
.scene svg text{font-family:var(--sans)}

/* frase en globo */
.bubble{position:relative;display:inline-block;max-width:560px;margin-top:28px;padding:18px 22px;border-radius:20px 20px 20px 6px;
  background:rgba(192,154,90,.1);border:1px solid var(--gold-dim2);font-size:1rem;line-height:1.7;color:var(--text)}
.bubble b{color:var(--gold-l);font-weight:500}

/* cita enorme a todo lo ancho */
.punch{padding:clamp(70px,12vh,140px) var(--pad);text-align:center;background:
  radial-gradient(ellipse at 50% 50%,rgba(210,72,60,.10),transparent 60%),var(--bg)}
.punch .huge{max-width:17ch;margin:0 auto}
.punch .tiny{margin-top:22px}

/* rejilla de 4 cifras */
.four{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:34px}
.fig{border:1px solid var(--gold-dim);border-radius:18px;padding:22px;background:var(--bg3);position:relative}
.fig .k{font-size:.56rem;letter-spacing:.2em;text-transform:uppercase;color:var(--text3)}
.fig .n{font-family:var(--serif);font-size:1.6rem;margin:8px 0 6px}
.fig p{font-size:.86rem;line-height:1.65;color:var(--text2)}
.fig.star{border-color:var(--gold);background:radial-gradient(ellipse at 50% 0%,rgba(192,154,90,.16),transparent 70%),var(--bg3)}
.fig.star::after{content:'★ La que manda';position:absolute;top:-11px;right:16px;background:var(--gold);color:#0a1120;font-size:.55rem;
  letter-spacing:.14em;text-transform:uppercase;font-weight:500;padding:5px 10px;border-radius:999px}

/* reglas */
.rules{display:grid;gap:14px;margin-top:34px}
.rule{display:grid;grid-template-columns:64px 1fr;gap:18px;align-items:start;border:1px solid var(--gold-dim);border-radius:18px;padding:20px;background:var(--bg3)}
.rule .ic{width:64px;height:64px;border-radius:16px;background:rgba(192,154,90,.08);display:grid;place-items:center}
.rule h4{font-family:var(--serif);font-weight:400;font-size:1.35rem;margin-bottom:6px}
.rule p{font-size:.92rem;line-height:1.7;color:var(--text2)}

/* escenarios */
.scen3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:30px}
.sc{border-radius:18px;padding:22px;border:1px solid var(--gold-dim);background:var(--bg3)}
.sc .lab{font-size:.56rem;letter-spacing:.2em;text-transform:uppercase}
.sc .val{font-family:var(--serif);font-size:2.4rem;line-height:1;margin:10px 0}
.sc p{font-size:.86rem;line-height:1.65;color:var(--text2)}
.sc.cold{border-color:rgba(111,168,232,.4)} .sc.cold .lab,.sc.cold .val{color:var(--cold)}
.sc.mid .lab,.sc.mid .val{color:var(--gold-l)}
.sc.hot{border-color:rgba(232,107,79,.4)} .sc.hot .lab,.sc.hot .val{color:var(--hot)}
.sc ul{list-style:none;margin-top:12px;display:grid;gap:6px}
.sc li{font-size:.82rem;color:var(--text2);display:flex;justify-content:space-between;border-top:1px solid var(--gold-dim);padding-top:6px}
.sc li b{font-weight:500}

/* trades */
.trades{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:34px}
.trade{border:1px solid var(--gold-dim);border-radius:18px;overflow:hidden;background:var(--bg3);text-decoration:none;display:flex;flex-direction:column}
.trade img{aspect-ratio:16/10;object-fit:cover;object-position:70% 50%;width:100%;height:auto}
.trade div{padding:16px 18px}
.trade b{font-family:var(--serif);font-weight:400;font-size:1.4rem;display:block}
.trade span{font-size:.8rem;color:var(--text2);line-height:1.6}
.tag{display:inline-block;font-size:.55rem;letter-spacing:.16em;text-transform:uppercase;padding:5px 10px;border-radius:999px;margin-bottom:8px}
.tag.up{color:var(--gold-l);border:1px solid var(--gold-dim2)} .tag.down{color:var(--hot);border:1px solid rgba(232,107,79,.4)}

/* botones */
.btn{display:inline-flex;align-items:center;gap:10px;padding:16px 30px;border-radius:999px;font-size:.66rem;letter-spacing:.16em;
  text-transform:uppercase;font-weight:500;text-decoration:none;border:1px solid transparent;transition:all .3s var(--ease)}
.btn-gold{background:linear-gradient(120deg,var(--gold),var(--gold-l));color:#0a1120}
.btn-gold:hover{box-shadow:0 16px 40px rgba(192,154,90,.28)}
.btn-line{border-color:var(--gold-dim2);color:var(--gold)}
.btn-line:hover{background:rgba(192,154,90,.07);border-color:var(--gold)}
.btn svg{width:15px;height:15px}
.ctas{display:flex;gap:12px;flex-wrap:wrap;justify-content:center;margin-top:34px}

/* barra de progreso de lectura */
.progress{position:fixed;left:0;top:0;height:2px;width:100%;z-index:900;background:linear-gradient(to right,var(--apple),var(--gold));
  transform-origin:left;transform:scaleX(var(--p,0))}

/* revelados */
[data-in]{opacity:0;transform:translateY(34px);transition:opacity .9s var(--out),transform .9s var(--out)}
[data-in].in{opacity:1;transform:none}
[data-in="2"]{transition-delay:.12s} [data-in="3"]{transition-delay:.24s}

/* animaciones de las ilustraciones */
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
@keyframes swing{0%,100%{transform:rotate(-4deg)}50%{transform:rotate(4deg)}}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.25}}
@keyframes ghost{0%,100%{opacity:.18}50%{opacity:.05}}
@keyframes draw{to{stroke-dashoffset:0}}
.bob{animation:bob 3.4s ease-in-out infinite}
.swing{transform-origin:50% 0;animation:swing 3s ease-in-out infinite}
.blink{animation:blink 1.6s ease-in-out infinite}
.ghost{animation:ghost 2.6s ease-in-out infinite}
.in .draw{animation:draw 2.2s var(--ease) forwards}
.draw{stroke-dasharray:900;stroke-dashoffset:900}

/* pie */
footer{padding:50px var(--pad) 40px;border-top:1px solid var(--gold-dim);text-align:center}
.foot-nav{display:flex;flex-wrap:wrap;gap:22px;justify-content:center;margin-bottom:26px}
.foot-nav a{font-size:.6rem;letter-spacing:.18em;text-transform:uppercase;color:var(--text3);text-decoration:none}
.foot-nav a:hover{color:var(--gold)}
.legal{max-width:720px;margin:0 auto;color:var(--text3);font-size:.62rem;line-height:1.8}
.src{max-width:720px;margin:0 auto 22px;color:var(--text3);font-size:.62rem;line-height:1.9}
.src a{color:var(--text2)}

/* gráficas anchas: en el celular se deslizan de lado en vez de encogerse */
.scene.wide .sw{overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none}
.scene.wide .sw::-webkit-scrollbar{display:none}
.scene.wide .hint{display:none}

/* ---------- celular primero ---------- */
@media (max-width:860px){
  .split,.split.rev{grid-template-columns:1fr}
  .split.rev>:first-child{order:0}
  .scen3,.trades{grid-template-columns:1fr}
}
@media (max-width:768px){
  .nav-btn{display:none}
  .nav-hamburger{display:flex}
  .nav-links{display:none;position:fixed;inset:0;flex-direction:column;align-items:center;justify-content:center;gap:30px;
    background:rgba(6,16,30,.96);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);z-index:850}
  .nav-links.open{display:flex}
  .nav-links a{font-size:1.05rem;letter-spacing:.2em}
  .four{grid-template-columns:1fr}
  .rule{grid-template-columns:48px 1fr;padding:16px}
  .rule .ic{width:48px;height:48px;border-radius:12px}
  .rule .ic svg{width:30px;height:30px}
  .bubble{font-size:.95rem}
  .scene.wide .sw svg{min-width:760px}
  .scene.wide .hint{display:block;margin-top:10px;font-size:.6rem;letter-spacing:.2em;text-transform:uppercase;color:var(--gold);text-align:center}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
  [data-in]{opacity:1;transform:none}
  .draw{stroke-dashoffset:0}
}

/* =============================================================
   ESTILO DUOLINGO: racha, examen, candados, insignias
   ============================================================= */
.hud{position:fixed;right:14px;bottom:14px;z-index:780;display:flex;gap:10px;padding:9px 14px;border-radius:999px;
  background:rgba(6,16,30,.88);border:1px solid var(--gold-dim2);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  font-size:.82rem;color:var(--text2)}
.hud b{color:var(--gold-l);font-weight:600}
.skip{display:inline-flex;align-items:center;gap:8px;margin-top:22px;padding:14px 22px;border-radius:14px;border:2px solid var(--hot);
  color:#fff;background:rgba(210,72,60,.9);font-size:.92rem;font-weight:600;line-height:1.4;text-decoration:none;box-shadow:0 14px 34px -14px rgba(210,72,60,.8)}
.skip:hover{background:var(--apple)}
/* examen */
.exam{background:radial-gradient(ellipse at 50% 0%,rgba(192,154,90,.12),transparent 60%),var(--bg2)}
.quiz{max-width:680px;margin:30px auto 0;border:1px solid var(--gold-dim2);border-radius:24px;padding:clamp(20px,4vw,34px);background:var(--bg3)}
.qz-top{display:flex;align-items:center;gap:14px;font-size:.62rem;letter-spacing:.18em;text-transform:uppercase;color:var(--text3)}
.qz-bar{flex:1;height:8px;border-radius:999px;background:var(--bg);overflow:hidden}
.qz-bar i{display:block;height:100%;background:linear-gradient(90deg,var(--gold),var(--gold-l));border-radius:999px;transition:width .5s var(--ease)}
.qz-q{font-family:var(--serif);font-weight:400;font-size:clamp(1.4rem,3.6vw,1.9rem);line-height:1.25;margin:22px 0 18px}
.qz-opts{display:grid;gap:10px}
.qz-opts button{text-align:left;font:inherit;font-size:.98rem;color:var(--text);padding:15px 18px;border-radius:14px;cursor:pointer;
  background:var(--bg2);border:1px solid var(--gold-dim);border-bottom-width:3px;transition:transform .15s,border-color .2s,background .2s}
.qz-opts button:hover:not(:disabled){border-color:var(--gold-dim2);transform:translateY(-1px)}
.qz-opts button.right{background:rgba(94,156,90,.18);border-color:#7FC27A;color:#BFE7BC}
.qz-opts button.wrong{background:rgba(232,107,79,.15);border-color:var(--hot);color:#F3B3A6;animation:shake .4s}
.qz-opts button:disabled{cursor:default}
@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-6px)}75%{transform:translateX(6px)}}
.qz-fb{margin-top:16px;border-radius:14px;padding:16px 18px;font-size:.95rem;line-height:1.65;display:none}
.qz-fb.yes,.qz-fb.no{display:block}
.qz-fb.yes{background:rgba(94,156,90,.14);color:#CBEBC8} .qz-fb.no{background:rgba(232,107,79,.12);color:#F3C2B8}
.qz-fb b{font-weight:600}
.qz-fb .qz-next{display:flex;margin:14px 0 0 auto}
.qz-lock,.qz-win{text-align:center}
.qz-lock h3,.qz-win h3,.gate-box h3{font-family:var(--serif);font-weight:400;font-size:clamp(1.5rem,4vw,2rem);margin:10px 0}
.qz-lock p,.qz-win p,.gate-box p{color:var(--text2);line-height:1.7;margin-bottom:20px}
.gate-ic{font-size:2.6rem}
/* candado de lección */
.gate{position:fixed;inset:0;z-index:950;display:grid;place-items:center;padding:20px;background:rgba(4,8,15,.86);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
.gate-box{max-width:460px;text-align:center;border:1px solid var(--gold-dim2);border-radius:24px;padding:30px 24px;background:var(--bg3)}
.gate-box .btn{margin:6px}
/* tablero: estados e insignias */
.lesson.locked{opacity:.55;filter:grayscale(.6)}
.lesson.done{border-color:rgba(127,194,122,.5)}
.lesson .state{font-size:.56rem;letter-spacing:.16em;text-transform:uppercase;color:var(--gold-l)}
.lesson.done .state{color:#7FC27A}
.streak-box{display:flex;align-items:center;gap:18px;margin-top:30px;padding:18px 22px;border:1px solid var(--gold-dim2);border-radius:20px;background:var(--bg3);max-width:520px}
.streak-box .f{font-size:2.6rem}
.streak-box b{font-family:var(--serif);font-weight:400;font-size:2.4rem;color:var(--gold-l);line-height:1}
.streak-box span{display:block;font-size:.82rem;color:var(--text2)}
.badges{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:18px}
.badge{border:1px solid var(--gold-dim);border-radius:18px;padding:18px;text-align:center;background:var(--bg3);opacity:.55}
.badge.got{opacity:1;border-color:var(--gold-dim2)}
.badge .bi{font-size:2rem}
.badge b{display:block;font-family:var(--serif);font-weight:400;font-size:1.15rem;margin:6px 0 4px}
.badge span{font-size:.76rem;color:var(--text2);line-height:1.5}
.confetti{position:fixed;inset:0;z-index:990;pointer-events:none}
@media (max-width:768px){.badges{grid-template-columns:1fr 1fr}.hud{bottom:12px;right:12px}}
/* sesión en el tablero */
.hud a{color:var(--gold-l);text-decoration:none;font-weight:500}
#acct{margin-top:28px;display:flex;gap:12px;flex-wrap:wrap}
.acct-in{display:flex;align-items:center;gap:16px;flex-wrap:wrap;padding:14px 18px;border:1px solid var(--gold-dim2);border-radius:20px;background:var(--bg3)}
.acct-in .who span{display:block;font-size:.7rem;color:var(--text3)}
.acct-in .who b{font-family:var(--serif);font-weight:400;font-size:1.5rem}
.streak-mini{display:flex;align-items:baseline;gap:6px;font-size:1.3rem}
.streak-mini b{font-family:var(--serif);font-weight:400;font-size:1.8rem;color:var(--gold-l)}
.streak-mini span{font-size:.78rem;color:var(--text2)}
.badge .claim{display:inline-block;margin-top:10px;font-size:.62rem;letter-spacing:.14em;text-transform:uppercase;color:var(--gold-l);text-decoration:none}
/* formularios */
.form{max-width:460px;margin:30px auto 0;display:grid;gap:14px;text-align:left}
.form label{font-size:.6rem;letter-spacing:.18em;text-transform:uppercase;color:var(--gold)}
.form input[type=text],.form input[type=email],.form input[type=tel]{width:100%;margin-top:6px;padding:15px 16px;border-radius:14px;border:1px solid var(--gold-dim2);
  background:var(--bg2);color:var(--text);font:inherit;font-size:1rem}
.form input:focus{outline:0;border-color:var(--gold)}
.check{display:flex;gap:10px;align-items:flex-start;font-size:.84rem;color:var(--text2);line-height:1.6;text-transform:none;letter-spacing:0}
.check input{margin-top:4px;width:18px;height:18px;accent-color:var(--gold)}
.check a{color:var(--gold-l)}
.form .btn{justify-content:center}
.msg{display:none;border-radius:14px;padding:14px 16px;font-size:.92rem;line-height:1.6}
.msg.ok{display:block;background:rgba(94,156,90,.14);color:#CBEBC8}
.msg.err{display:block;background:rgba(232,107,79,.12);color:#F3C2B8}
.tabs{display:flex;gap:6px;justify-content:center;margin-top:26px}
.tabs button{font:inherit;font-size:.62rem;letter-spacing:.16em;text-transform:uppercase;padding:10px 16px;border-radius:999px;border:1px solid var(--gold-dim);
  background:transparent;color:var(--text2);cursor:pointer}
.tabs button.on{border-color:var(--gold);color:var(--gold-l);background:rgba(192,154,90,.08)}