/* ════════════════════════════════════════════════════════════
   Copilot Course — Motor de lecciones (slide deck teórico)
   Compartido por todas las lecciones (mXlY.html)
   ════════════════════════════════════════════════════════════ */
:root{
  --copilot:linear-gradient(120deg,#0a9bd6 0%,#4b53bc 38%,#8e4ec6 68%,#d33a8e 100%);
  --ink:#0f1b2d; --ink-2:#3b4a5e; --ink-3:#6b7a8d; --line:rgba(15,30,45,.10);
  --bg:#ffffff; --bg-2:#f5f8fb;
  --sans:"Segoe UI",-apple-system,system-ui,Arial,sans-serif;
  --ease:cubic-bezier(.16,1,.3,1);
  /* acento del módulo (lo setea el HTML de cada lección) */
  --acc:#4b53bc; --acc-d:#373d96; --acc-soft:rgba(75,83,188,.10);
}
*,*::before,*::after{box-sizing:border-box}
html,body{margin:0;padding:0;height:100%;background:var(--bg-2);font-family:var(--sans);color:var(--ink);
  -webkit-font-smoothing:antialiased;line-height:1.6;overflow:hidden}
a{color:inherit;text-decoration:none}

#app{display:flex;flex-direction:column;height:100vh;height:100dvh}

/* ── TOP BAR ── */
.topbar{flex-shrink:0;display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:11px clamp(14px,3vw,36px);background:rgba(255,255,255,.9);backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--line);z-index:30}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:14px;letter-spacing:-.01em;min-width:0}
.brand .logo{height:46px;width:auto;flex-shrink:0;object-fit:contain}
.brand .va-logo{height:34px;width:auto;flex-shrink:0;object-fit:contain;border-radius:6px}
.brand .bt{min-width:0;overflow:hidden}
.brand .bt b{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.brand .bt small{display:block;font-weight:600;font-size:11px;color:var(--ink-3)}
.top-actions{display:inline-flex;gap:8px;align-items:center}
.btn-top{display:inline-flex;align-items:center;gap:6px;padding:8px 13px;border-radius:999px;border:1.5px solid var(--line);
  background:#fff;color:var(--ink);font-family:var(--sans);font-size:13px;font-weight:700;cursor:pointer;
  white-space:nowrap;transition:all .2s var(--ease)}
.btn-top:hover{border-color:var(--acc);color:var(--acc);transform:translateY(-1px);box-shadow:0 6px 16px rgba(15,30,45,.10)}
.btn-top.solid{background:var(--acc);color:#fff;border-color:var(--acc)}
.btn-top.solid:hover{background:var(--acc-d);color:#fff}

/* ── PROGRESS DOTS ── */
.dots{flex-shrink:0;display:flex;gap:6px;justify-content:center;align-items:center;padding:12px;background:var(--bg-2)}
.dot{height:5px;width:22px;border-radius:3px;background:rgba(15,30,45,.14);transition:all .4s var(--ease);cursor:pointer}
.dot.done{background:var(--acc);opacity:.5}
.dot.active{background:var(--acc);width:42px}

/* ── SLIDE AREA ── */
.deck{flex:1;position:relative;overflow:hidden}
.slide{position:absolute;inset:0;display:none;overflow-y:auto;padding:clamp(20px,4vh,48px) clamp(18px,5vw,64px)}
.slide.active{display:block;animation:slideFade .45s var(--ease)}
@keyframes slideIn{from{opacity:0;transform:translateX(26px)}to{opacity:1;transform:none}}
@keyframes slideFade{from{opacity:0}to{opacity:1}}
.slide-in{max-width:920px;margin:0 auto;min-height:100%;display:flex;flex-direction:column;justify-content:safe center}

/* eyebrow / section label */
.eyebrow{display:inline-flex;align-items:center;gap:9px;padding:6px 14px;border-radius:999px;background:var(--acc-soft);
  color:var(--acc-d);font-weight:800;font-size:12.5px;letter-spacing:.02em;align-self:flex-start;margin-bottom:18px}
.eyebrow .ico{font-size:16px;line-height:1}

h2.sh{font-size:clamp(26px,3.4vw+.4vh,46px);line-height:1.1;letter-spacing:-.025em;font-weight:900;margin:0 0 18px}
.lead{font-size:clamp(17px,1vw+.6vh,22px);color:var(--ink-2);font-weight:500;margin:0 0 14px;max-width:44em}
.body-p{font-size:clamp(15.5px,.7vw+.5vh,19px);color:var(--ink-2);margin:0 0 14px;max-width:46em}
.body-p b{color:var(--ink);font-weight:700}

/* ── COVER ── */
.slide.t-cover .slide-in{align-items:center;text-align:center}
.cover-badge{display:inline-flex;align-items:center;gap:10px;padding:9px 18px;border-radius:999px;
  background:var(--acc-soft);color:var(--acc-d);font-weight:800;font-size:14px;margin-bottom:26px}
.cover-badge .ci{font-size:22px}
.cover-title{font-size:clamp(34px,5vw+.5vh,68px);line-height:1.04;letter-spacing:-.035em;font-weight:900;margin:0;max-width:16ch}
.cover-sub{font-size:clamp(17px,1.1vw+.6vh,23px);color:var(--ink-2);font-weight:500;margin:22px 0 0;max-width:40ch}
.cover-hint{margin:40px 0 0;display:inline-flex;align-items:center;gap:10px;color:var(--ink-3);font-size:14px;font-weight:600;
  animation:bob 2s ease-in-out infinite}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(5px)}}

/* ── CONCEPT (heading + body + visual) ── */
.concept-grid{display:grid;grid-template-columns:1fr auto;gap:34px;align-items:center}
.concept-visual{font-size:clamp(80px,11vw,150px);line-height:1;filter:drop-shadow(0 14px 30px var(--acc-soft))}
@media(max-width:680px){.concept-grid{grid-template-columns:1fr}.concept-visual{font-size:90px}}

/* compare antes/después */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:10px}
.compare .col{padding:22px 24px;border-radius:18px;border:1px solid var(--line)}
.compare .before{background:#fef2f2;border-color:#fecaca}
.compare .after{background:var(--acc-soft);border-color:var(--acc)}
.compare h4{margin:0 0 10px;font-size:14px;text-transform:uppercase;letter-spacing:.05em;font-weight:800}
.compare .before h4{color:#b91c1c}.compare .after h4{color:var(--acc-d)}
.compare p{margin:0;font-size:16px;color:var(--ink-2);font-weight:500}
@media(max-width:680px){.compare{grid-template-columns:1fr}}

/* ── BULLET CARDS ── */
.cards{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:6px}
.card{display:flex;gap:15px;align-items:flex-start;padding:20px 22px;background:var(--bg);border:1px solid var(--line);
  border-radius:16px;box-shadow:0 4px 14px rgba(15,30,45,.04);transition:transform .3s var(--ease),box-shadow .3s var(--ease)}
.card:hover{transform:translateY(-3px);box-shadow:0 16px 32px rgba(15,30,45,.12)}
.card .cico{font-size:32px;line-height:1;flex-shrink:0}
.card .ctt b{display:block;font-size:16.5px;font-weight:800;color:var(--ink);margin-bottom:3px}
.card .ctt span{font-size:14.5px;color:var(--ink-3);font-weight:500}
@media(max-width:680px){.cards{grid-template-columns:1fr}}

/* ── STEPS ── */
.steps{display:flex;flex-direction:column;gap:14px;margin-top:6px}
.step{display:flex;gap:18px;align-items:flex-start;padding:18px 22px;background:var(--bg);border:1px solid var(--line);
  border-radius:16px;box-shadow:0 4px 14px rgba(15,30,45,.04)}
.step .sn{width:42px;height:42px;border-radius:12px;background:var(--acc);color:#fff;font-weight:900;font-size:19px;
  display:flex;align-items:center;justify-content:center;flex-shrink:0}
.step .stt b{display:block;font-size:17px;font-weight:800;color:var(--ink);margin-bottom:3px}
.step .stt span{font-size:15px;color:var(--ink-2);font-weight:500}

/* ── PROMPTS ── */
.prompt{display:flex;gap:14px;align-items:center;padding:16px 18px;background:linear-gradient(135deg,var(--acc-soft),transparent);
  border:1px solid var(--line);border-left:4px solid var(--acc);border-radius:12px;margin-bottom:12px}
.prompt .pq{flex:1;font-size:16px;font-weight:600;color:var(--ink);font-style:italic}
.prompt .pq::before{content:"\201C";color:var(--acc);font-weight:900}
.prompt .pq::after{content:"\201D";color:var(--acc);font-weight:900}
.copy-btn{flex-shrink:0;border:1.5px solid var(--line);background:#fff;color:var(--ink-2);border-radius:8px;
  padding:8px 13px;font-size:12.5px;font-weight:700;cursor:pointer;transition:all .2s var(--ease)}
.copy-btn:hover{border-color:var(--acc);color:var(--acc)}
.copy-btn.ok{background:var(--acc);color:#fff;border-color:var(--acc)}

/* ── TIP / CAUTION callouts ── */
.callout{display:flex;gap:16px;align-items:flex-start;margin-top:10px;padding:22px 26px;border-radius:18px}
.callout .calico{font-size:34px;line-height:1;flex-shrink:0}
.callout b{display:block;font-size:14px;text-transform:uppercase;letter-spacing:.05em;margin-bottom:5px}
.callout p{margin:0;font-size:17px;font-weight:500}
.callout.tip{background:linear-gradient(135deg,#fff7ed,#fffbeb);border:1px solid #fcd9a8}
.callout.tip b{color:#b45309}.callout.tip p{color:#78350f}
.callout.warn{background:linear-gradient(135deg,#fef2f2,#fff1f2);border:1px solid #fecaca}
.callout.warn b{color:#b91c1c}.callout.warn p{color:#7f1d1d}
.callout.info{background:var(--acc-soft);border:1px solid var(--acc)}
.callout.info b{color:var(--acc-d)}.callout.info p{color:var(--ink)}

/* ── VIDEO SLIDE ── */
.video-card{margin-top:8px;border-radius:20px;overflow:hidden;position:relative;aspect-ratio:16/9;
  background:linear-gradient(135deg,var(--acc) 0%,var(--acc-d) 100%);box-shadow:0 24px 50px -18px rgba(15,30,45,.4)}
.video-card iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.video-ph{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;color:#fff;gap:14px;padding:24px}
.video-ph::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 30% 25%,rgba(255,255,255,.18),transparent 55%)}
.play-btn{width:84px;height:84px;border-radius:50%;background:rgba(255,255,255,.18);border:2px solid rgba(255,255,255,.6);
  display:flex;align-items:center;justify-content:center;font-size:34px;backdrop-filter:blur(4px);position:relative;
  animation:pulse 2.4s ease-in-out infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(255,255,255,.25)}50%{box-shadow:0 0 0 18px rgba(255,255,255,0)}}
.video-ph h3{margin:0;font-size:clamp(18px,1.4vw+.4vh,24px);font-weight:800;position:relative}
.video-ph p{margin:0;opacity:.88;font-size:14px;max-width:34em;position:relative}
.video-card video.lesson-video{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;background:#000;border:0;display:block}
.hide{display:none}
.video-rec{margin-top:6px;display:inline-flex;align-items:center;gap:8px;padding:11px 20px;border-radius:999px;
  background:#fff;color:var(--acc-d);font-weight:800;font-size:14px;position:relative;transition:all .2s var(--ease)}
.video-rec:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(0,0,0,.25)}

/* ── CLOSING ── */
.slide.t-closing .slide-in{align-items:center;text-align:center}
.closing-ico{font-size:64px;line-height:1;margin-bottom:8px;animation:bob 2.4s ease-in-out infinite}
.recap{list-style:none;padding:0;margin:24px auto 0;max-width:30em;text-align:left;display:flex;flex-direction:column;gap:10px}
.recap li{display:flex;gap:12px;align-items:flex-start;font-size:16.5px;color:var(--ink-2);font-weight:500}
.recap li::before{content:"✓";color:var(--acc);font-weight:900;font-size:18px;flex-shrink:0}

/* ── FOOTER NAV ── */
.foot{flex-shrink:0;display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:12px clamp(14px,3vw,36px);background:var(--bg);border-top:1px solid var(--line);z-index:20}
.nav-btn{display:inline-flex;align-items:center;gap:9px;padding:12px 22px;border-radius:12px;border:0;cursor:pointer;
  font-family:var(--sans);font-size:14.5px;font-weight:800;letter-spacing:.01em;transition:all .25s var(--ease)}
.nav-prev{background:var(--bg);color:var(--ink);border:1.5px solid var(--line)}
.nav-prev:hover:not(:disabled){border-color:var(--ink);transform:translateX(-2px)}
.nav-next{background:var(--acc);color:#fff}
.nav-next:hover{background:var(--acc-d);transform:translateX(2px)}
.nav-btn:disabled{opacity:.4;cursor:not-allowed}
.foot-count{font-size:13px;font-weight:700;color:var(--ink-3);letter-spacing:.03em}

/* ── CHATBOT / RECURSOS MODALS ── */
.modal{position:fixed;inset:0;z-index:200;background:rgba(15,27,45,.55);backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);display:none;align-items:center;justify-content:center;
  padding:clamp(14px,4vh,48px) clamp(14px,4vw,64px);opacity:0;transition:opacity .3s}
.modal.show{display:flex;opacity:1}
.modal-shell{width:100%;height:100%;max-width:1000px;background:#fff;border-radius:18px;overflow:hidden;display:flex;
  flex-direction:column;box-shadow:0 30px 80px rgba(0,0,0,.45);transform:scale(.96) translateY(16px);opacity:0;
  transition:transform .35s var(--ease),opacity .35s var(--ease)}
.modal.show .modal-shell{transform:none;opacity:1}
.modal-head{display:flex;justify-content:space-between;align-items:center;padding:15px 20px;background:var(--copilot);color:#fff;font-weight:800;font-size:16px}
.modal-x{width:34px;height:34px;border-radius:999px;border:0;background:rgba(255,255,255,.2);color:#fff;font-size:20px;cursor:pointer;transition:all .2s}
.modal-x:hover{background:rgba(255,255,255,.34);transform:rotate(90deg)}
.modal-frame{flex:1;width:100%;border:0;background:var(--bg-2)}

/* ── RESPONSIVE ── */
.brand .bt small{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:42vw}

@media(max-width:760px){
  .slide{padding:22px 18px 26px}
  .cards,.compare,.concept-grid{grid-template-columns:1fr!important}
  .concept-visual{font-size:88px;margin-top:6px}
  .dots{flex-wrap:wrap;gap:5px;padding:9px}
  .dot{width:16px;height:5px}.dot.active{width:30px}
}
@media(max-width:680px){
  .brand .bt small{display:none}
  .nav-btn .nav-lbl{display:none}        /* oculta "Siguiente"/"Anterior" */
  .vlbl{display:none}                    /* botón Voz solo ícono en móvil */
  .nav-lbl-end{display:inline!important} /* PERO mantiene "Volver al curso" */
  .nav-btn{padding:12px 18px}
  .step{padding:15px 16px;gap:14px}.step .sn{width:36px;height:36px;font-size:16px}
  .callout{padding:18px 18px}.callout .calico{font-size:28px}
  h2.sh{margin-bottom:14px}
}
@media(max-width:520px){
  .brand .bt{display:none}              /* solo logo en pantallas chicas */
  .btn-top .btxt{display:none}          /* botones solo ícono: deja espacio al logo */
  .btn-top{padding:8px 11px;font-size:12.5px}
  .top-actions{gap:6px}
  .topbar{padding:10px 14px}
  .foot{padding:10px 14px}
  .cover-title{font-size:30px}
  .prompt{flex-direction:column;align-items:stretch;gap:10px}
  .prompt .copy-btn{align-self:flex-end}
}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

/* ════════════ EFECTOS v2 + VOZ ════════════ */
@keyframes fadeUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:none}}

/* entrada escalonada de los elementos del slide */
.slide.active .eyebrow,.slide.active h2.sh,.slide.active .lead,.slide.active .body-p,
.slide.active .concept-grid,.slide.active .compare,.slide.active .callout,.slide.active .video-card,
.slide.active .cover-badge,.slide.active .cover-title,.slide.active .cover-sub,.slide.active .cover-hint,
.slide.active .closing-ico,.slide.active .recap{animation:fadeUp .55s var(--ease) both}
.slide.active h2.sh{animation-delay:.06s}
.slide.active .lead,.slide.active .body-p,.slide.active .concept-grid,.slide.active .compare,
.slide.active .callout,.slide.active .video-card,.slide.active .cover-sub{animation-delay:.12s}
.slide.active .cover-hint,.slide.active .recap{animation-delay:.2s}

/* tarjetas, pasos y prompts entran en cascada */
.slide.active .card,.slide.active .step,.slide.active .prompt{animation:fadeUp .5s var(--ease) both}
.slide.active .card:nth-child(1),.slide.active .step:nth-child(1),.slide.active .prompt:nth-child(1){animation-delay:.16s}
.slide.active .card:nth-child(2),.slide.active .step:nth-child(2),.slide.active .prompt:nth-child(2){animation-delay:.24s}
.slide.active .card:nth-child(3),.slide.active .step:nth-child(3),.slide.active .prompt:nth-child(3){animation-delay:.32s}
.slide.active .card:nth-child(4),.slide.active .step:nth-child(4),.slide.active .prompt:nth-child(4){animation-delay:.40s}
.slide.active .card:nth-child(5),.slide.active .step:nth-child(5),.slide.active .prompt:nth-child(5){animation-delay:.48s}
.slide.active .prompt:nth-child(6){animation-delay:.56s}

/* micro-interacciones */
.step{transition:transform .3s var(--ease),box-shadow .3s var(--ease)}
.step:hover{transform:translateX(4px);box-shadow:0 14px 30px rgba(15,30,45,.10)}
.step .sn{transition:transform .3s var(--ease)}
.step:hover .sn{transform:scale(1.08) rotate(-4deg)}
.prompt{transition:transform .3s var(--ease),box-shadow .3s var(--ease)}
.prompt:hover{transform:translateX(3px);box-shadow:0 10px 26px var(--acc-soft)}
.dot.active{box-shadow:0 0 0 4px var(--acc-soft)}

/* título de portada con gradiente de marca */
@supports ((-webkit-background-clip:text) or (background-clip:text)){
  .cover-title{background:var(--copilot);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
}

/* tinte de acento sutil detrás del deck */
.deck::before{content:"";position:absolute;inset:0;pointer-events:none;opacity:.7;
  background:radial-gradient(circle at 86% 10%,var(--acc-soft),transparent 40%),radial-gradient(circle at 8% 92%,var(--acc-soft),transparent 38%)}

/* botón de voz activo */
.btn-top.on{background:var(--acc);color:#fff;border-color:var(--acc)}
.btn-top.on:hover{background:var(--acc-d);color:#fff}

/* gate de narración por voz */
.vgate{align-items:center;justify-content:center}
.vgate-card{background:#fff;border-radius:22px;padding:34px 30px;max-width:380px;width:100%;text-align:center;
  box-shadow:0 30px 80px rgba(0,0,0,.4);transform:scale(.96);opacity:0;transition:transform .35s var(--ease),opacity .35s var(--ease)}
.vgate.show .vgate-card{transform:none;opacity:1}
.vgate-ic{font-size:54px;line-height:1;margin-bottom:10px}
.vgate-card h3{margin:0 0 8px;font-size:22px;font-weight:900;color:var(--ink)}
.vgate-card p{margin:0 0 22px;color:var(--ink-3);font-size:15px;font-weight:500}
.vgate-row{display:flex;flex-direction:column;gap:10px}
.vg-on{background:var(--acc);color:#fff;border:0;border-radius:12px;padding:14px;font-weight:800;font-size:16px;
  cursor:pointer;font-family:var(--sans);transition:all .2s var(--ease)}
.vg-on:hover{background:var(--acc-d)}
.vg-off{background:none;border:1.5px solid var(--line);color:var(--ink-2);border-radius:12px;padding:12px;
  font-weight:700;font-size:14px;cursor:pointer;font-family:var(--sans)}
.vg-off:hover{border-color:var(--ink-3);color:var(--ink)}

/* avatar parlante en esquina de la lección */
.lesson-avatar{position:fixed;bottom:80px;right:24px;width:220px;height:220px;border-radius:22px;overflow:hidden;background:#fff;z-index:25;border:3px solid #fff;box-shadow:0 22px 60px rgba(15,30,45,.4);animation:avPopL .55s var(--ease) both}
.lesson-avatar video{width:100%;height:100%;object-fit:cover;display:block;background:#fff}
.lesson-avatar.hide{display:none}
@keyframes avPopL{from{opacity:0;transform:translateY(20px) scale(.94)}to{opacity:1;transform:none}}
@media (max-width:760px){.lesson-avatar{width:140px;height:140px;bottom:74px;right:14px;border-radius:16px;border-width:2px}}
@media (max-width:520px){.lesson-avatar{width:110px;height:110px;bottom:62px;right:10px;border-radius:14px}}

/* ── Descarga de material de práctica ── */
.btn-top.dl{background:var(--acc);color:#fff;border-color:var(--acc)}
.btn-top.dl:hover{background:var(--acc-d);color:#fff;border-color:var(--acc-d);transform:translateY(-1px)}
.dl-cta{display:inline-flex;align-items:center;gap:16px;margin:32px auto 0;padding:18px 26px;max-width:580px;width:100%;
  border-radius:18px;text-align:left;cursor:pointer;color:#fff;
  background:linear-gradient(120deg,var(--acc),var(--acc-d));
  box-shadow:0 16px 36px var(--acc-soft),0 4px 12px rgba(15,30,45,.14);
  border:1px solid rgba(255,255,255,.18);transition:transform .2s var(--ease),box-shadow .2s var(--ease)}
.dl-cta:hover{transform:translateY(-2px);box-shadow:0 22px 48px var(--acc-soft),0 8px 18px rgba(15,30,45,.20)}
.dl-cta .dl-ic{font-size:34px;line-height:1;flex-shrink:0}
.dl-cta .dl-tx{display:flex;flex-direction:column;gap:3px;min-width:0}
.dl-cta .dl-tx b{font-size:17px;font-weight:800;letter-spacing:-.01em}
.dl-cta .dl-tx small{font-size:13.5px;opacity:.93;font-weight:500;line-height:1.4}
.dl-cta .dl-arrow{margin-left:auto;font-size:22px;flex-shrink:0;animation:bob 2s ease-in-out infinite}
@media (max-width:560px){.dl-cta{gap:12px;padding:15px 18px}.dl-cta .dl-ic{font-size:28px}.dl-cta .dl-arrow{display:none}}

/* ── Animación Lottie ── */
.lottie-box{width:100%;max-width:440px;margin:14px auto 0;aspect-ratio:1/1}
.lottie-box svg{display:block}

/* ── Quiz interactivo en lección ── */
.quiz{display:flex;flex-direction:column;gap:14px;max-width:660px;margin-top:6px}
.quiz-opt{display:flex;align-items:center;gap:14px;text-align:left;padding:15px 18px;border-radius:14px;border:1.5px solid var(--line);background:#fff;
  font-family:var(--sans);font-size:clamp(15px,.6vw+.5vh,17px);font-weight:600;color:var(--ink);cursor:pointer;
  transition:border-color .2s var(--ease),transform .2s var(--ease),background .2s var(--ease)}
.quiz-opt .qlet{flex:none;width:32px;height:32px;border-radius:9px;background:var(--acc-soft);color:var(--acc);
  font-weight:800;font-size:15px;display:flex;align-items:center;justify-content:center}
.quiz-opt .qtxt{flex:1;min-width:0}
.quiz-opt.ok .qlet{background:#1a9d54;color:#fff}
.quiz-opt.bad .qlet{background:#d33a3a;color:#fff}
.quiz-opt:hover:not(:disabled){border-color:var(--acc);transform:translateY(-1px)}
.quiz-opt:disabled{cursor:default}
.quiz-opt.ok{border-color:#1a9d54;background:rgba(26,157,84,.12);color:#137a40;font-weight:800}
.quiz-opt.bad{border-color:#d33a3a;background:rgba(211,58,58,.09);color:#b02a2a}
.quiz-fb{display:none;margin-top:8px;padding:14px 16px;border-radius:12px;font-weight:600;font-size:14.5px;line-height:1.5}
.quiz-fb.show{display:block;animation:slideFade .35s var(--ease)}
.quiz-fb.ok{background:rgba(26,157,84,.10);color:#137a40}
.quiz-fb.bad{background:rgba(211,58,58,.08);color:#b02a2a}

/* ── Link de resumen PDF en la portada ── */
.sum-link{display:inline-flex;align-items:center;gap:7px;margin:14px auto 0;padding:9px 16px;border-radius:999px;
  border:1.5px solid var(--line);color:var(--acc-d);font-weight:700;font-size:13.5px;background:#fff;
  transition:border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease)}
.sum-link:hover{border-color:var(--acc);transform:translateY(-1px);box-shadow:0 6px 16px rgba(15,30,45,.10)}
/* Botón de resumen (cierre): oscuro, alto contraste, distinto al de práctica */
.dl-cta.dl-resumen{background:linear-gradient(120deg,#3a4658,#222b3a);box-shadow:0 16px 36px rgba(15,30,45,.22),0 4px 12px rgba(15,30,45,.16)}
.dl-cta.dl-resumen:hover{box-shadow:0 22px 48px rgba(15,30,45,.28)}
.slide.t-closing .dl-cta{text-align:left}