/* ==========================================================
   APRENDE CON DOSE TIC — recursos de aprendizaje
   Usa los colores y componentes de base.css.
   Lo usan: dose-tic/index.html (sección "Aprende"),
            dose-tic/aprende/ (índice) y cada lección.
   ========================================================== */

/* ---------- etiquetas ---------- */
.tag-row{display:flex;flex-wrap:wrap;gap:8px}
.tag{display:inline-flex;align-items:center;gap:6px;font:600 .74rem var(--font-display);letter-spacing:.06em;
  color:var(--navy-800);background:#fff;border:1px solid var(--line-strong);padding:5px 11px;border-radius:999px}
.tag.blue{color:var(--blue-500);background:var(--blue-100);border-color:var(--blue-200)}
.tag.soon{color:var(--muted);background:var(--blue-50);border-style:dashed}

/* ---------- editor embebido (Coddy) ---------- */
.code-embed{margin:0;border-radius:18px;overflow:hidden;background:#1e1f20;
  border:1px solid #424548;box-shadow:0 30px 70px rgba(6,26,77,.28)}
.code-embed-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 16px;background:#2d2e2f;border-bottom:1px solid #424548}
.code-embed-bar .dots{display:flex;gap:7px}
.code-embed-bar .dots i{width:11px;height:11px;border-radius:50%;background:#5b5e62}
.code-embed-bar .dots i:nth-child(1){background:#ff5f57}.code-embed-bar .dots i:nth-child(2){background:#febc2e}.code-embed-bar .dots i:nth-child(3){background:#28c840}
.code-embed-bar span{font:600 .74rem var(--font-display);letter-spacing:.1em;text-transform:uppercase;color:rgba(255,255,255,.65)}
.code-embed iframe{display:block;border:0;width:100%;height:480px;background:#1e1f20}
.code-embed figcaption{box-sizing:border-box;padding:6px 14px;font:11px/1.4 system-ui,-apple-system,sans-serif;color:rgba(255,255,255,.6);
  background:#2d2e2f;border-top:1px solid #424548;text-align:right}
.code-embed figcaption a{color:#4f9bff;font-weight:600;text-decoration:none}

/* ---------- sección "Aprende" en la página de DOSE TIC ---------- */
.learn{background:var(--blue-50);border-block:1px solid var(--line)}
.learn-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:56px;align-items:center}
.learn-copy h2{font-size:clamp(1.9rem,3.8vw,3rem)}
.learn-copy>p{margin-top:18px;font-size:1.05rem;max-width:520px}
.learn-list{list-style:none;margin:26px 0 0;padding:0;display:grid;gap:12px}
.learn-list li{display:flex;gap:12px;align-items:flex-start;color:var(--ink);font-size:.98rem}
.learn-list li::before{content:"✓";flex:none;width:22px;height:22px;border-radius:50%;display:grid;place-items:center;background:var(--blue-100);color:var(--blue-500);font-size:.72rem;font-weight:700;margin-top:2px}
.learn .actions{margin-top:30px}

/* ---------- tarjetas de lecciones ---------- */
.lessons{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.lesson-card{position:relative;display:flex;flex-direction:column;gap:14px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:28px;box-shadow:var(--shadow-sm);text-decoration:none;color:inherit;
  transition:transform .35s var(--ease),box-shadow .35s,border-color .35s}
a.lesson-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:var(--blue-200)}
.lesson-card .num{font:600 .76rem var(--font-display);letter-spacing:.1em;color:var(--blue-500)}
.lesson-card h3{font-size:1.18rem}
.lesson-card p{font-size:.95rem}
.lesson-card .go{margin-top:auto;font-weight:600;color:var(--blue-500);font-size:.95rem}
.lesson-card.is-soon{background:var(--blue-50);border-style:dashed;box-shadow:none}
.lesson-card.is-soon h3{color:var(--navy-800)}

/* ---------- página de lección ---------- */
.crumbs{display:flex;flex-wrap:wrap;gap:8px;font-size:.86rem;color:var(--muted);margin-bottom:22px}
.crumbs a{color:var(--blue-500);text-decoration:none}
.crumbs a:hover{text-decoration:underline}
.lesson-hero .hero-content{padding-block:72px 64px}
.lesson-hero h1{max-width:20ch;font-size:clamp(2.1rem,4.6vw,3.6rem)}
.lesson-hero .tag-row{margin-top:26px}

.lesson-layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:56px;align-items:start}
.lesson-body{min-width:0}
.lesson-body>section{padding-top:56px}
.lesson-body>section:first-child{padding-top:0}
.lesson-body h2{font-size:clamp(1.5rem,2.8vw,2rem);margin-bottom:14px}
.lesson-body h3{font-size:1.12rem;margin:26px 0 8px}
.lesson-body p{font-size:1.04rem;max-width:68ch}
.lesson-body p+p{margin-top:14px}
.lesson-body code{font:500 .92em ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;background:var(--blue-100);color:var(--navy-800);padding:2px 6px;border-radius:6px}
.lesson-body pre{margin:16px 0 0;background:#0b1530;color:#dbe7ff;border-radius:14px;padding:18px 20px;overflow:auto;font:500 .9rem/1.6 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.lesson-body pre code{background:none;color:inherit;padding:0}
.lesson-body .embed-wrap{margin-top:22px}
.tip{margin-top:20px;background:#fff;border:1px solid var(--line);border-left:4px solid var(--blue-500);border-radius:12px;padding:16px 18px;font-size:.98rem;box-shadow:var(--shadow-sm)}
.tip b{color:var(--ink)}

.explain{list-style:none;margin:18px 0 0;padding:0;display:grid;gap:12px;counter-reset:l}
.explain li{display:grid;grid-template-columns:auto 1fr;gap:14px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px 18px}
.explain li::before{counter-increment:l;content:"Línea " counter(l);font:600 .72rem var(--font-display);letter-spacing:.08em;color:var(--blue-500);background:var(--blue-100);border-radius:999px;padding:4px 10px;height:max-content}

.challenge{margin-top:14px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow-sm)}
.challenge summary{cursor:pointer;list-style:none;padding:18px 20px;font:600 1rem var(--font-display);color:var(--ink);display:flex;justify-content:space-between;gap:16px}
.challenge summary::-webkit-details-marker{display:none}
.challenge summary::after{content:"Ver solución +";font:600 .8rem var(--font-body);color:var(--blue-500);white-space:nowrap}
.challenge[open] summary::after{content:"Ocultar −"}
.challenge .challenge-body{padding:0 20px 20px}
.challenge .challenge-body pre{margin-top:10px}

.lesson-aside{position:sticky;top:96px;display:grid;gap:16px}
.toc{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow-sm)}
.toc h2{font:600 .76rem var(--font-display);letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin-bottom:12px}
.toc ol{margin:0;padding-left:18px;display:grid;gap:8px;font-size:.93rem}
.toc a{color:var(--text);text-decoration:none}
.toc a:hover{color:var(--blue-500)}
.aside-cta{background:linear-gradient(155deg,var(--navy-800),var(--navy-900));color:#C9D9F7;border-radius:var(--radius);padding:24px;font-size:.93rem}
.aside-cta h2{color:#fff;font-size:1.08rem;margin-bottom:8px}
.aside-cta .btn{width:100%;margin-top:16px;min-height:44px;padding:10px 18px;font-size:.9rem}

.share{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.share a{display:inline-flex;align-items:center;gap:8px;text-decoration:none;font-weight:600;font-size:.9rem;padding:9px 16px;border-radius:999px;border:1px solid var(--line-strong);color:var(--navy-800);background:#fff;transition:border-color .2s,color .2s}
.share a:hover{border-color:var(--blue-500);color:var(--blue-500)}

.next-lesson{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap;margin-top:56px;padding:24px 26px;background:var(--blue-50);border:1px solid var(--line);border-radius:var(--radius)}
.next-lesson small{display:block;color:var(--muted);font-size:.82rem}
.next-lesson b{font-family:var(--font-display);color:var(--ink)}

/* ---------- responsive ---------- */
@media (max-width:980px){
  .learn-grid,.lesson-layout{grid-template-columns:1fr;gap:40px}
  .lessons{grid-template-columns:repeat(2,minmax(0,1fr))}
  .lesson-aside{position:static}
}
@media (max-width:640px){
  .lessons{grid-template-columns:1fr}
  .code-embed iframe{height:420px}
  .lesson-hero .hero-content{padding-block:52px 48px}
  .explain li{grid-template-columns:1fr}
}

/* ---------- tarjeta "Plataforma completa" (Coddy, se abre en pestaña nueva) ---------- */
.platform{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;margin-top:56px;padding:44px;border-radius:24px;color:#C9D9F7;
  background:radial-gradient(circle at 90% 10%,rgba(47,124,232,.45),transparent 45%),linear-gradient(135deg,var(--navy-800),var(--navy-950));
  box-shadow:0 30px 60px rgba(6,26,77,.28);position:relative;overflow:hidden}
.platform .kicker{color:var(--blue-300)}
.platform h2,.platform h3{color:#fff;font-size:clamp(1.6rem,3vw,2.3rem)}
.platform p{margin-top:14px;max-width:52ch}
.platform .actions{margin-top:26px}
.platform small{display:block;margin-top:14px;font-size:.82rem;color:#8EA3CE}
.platform-steps{list-style:none;margin:0;padding:0;display:grid;gap:12px;counter-reset:p}
.platform-steps li{display:flex;align-items:center;gap:14px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.15);border-radius:16px;padding:16px 18px;color:#fff;font-weight:500}
.platform-steps li::before{counter-increment:p;content:counter(p);flex:none;width:34px;height:34px;border-radius:10px;display:grid;place-items:center;background:#fff;color:var(--blue-500);font:600 .95rem var(--font-display)}
.platform-link{display:inline-flex;align-items:center;gap:6px;margin-top:14px;font-weight:600;color:var(--blue-500);text-decoration:none}
.platform-link:hover{text-decoration:underline}
@media (max-width:900px){.platform{grid-template-columns:1fr;padding:30px 24px}}

/* ---------- menú de lenguajes del editor (js/playground.js) ---------- */
.lang-picker{display:flex;gap:6px;overflow-x:auto;padding:10px 12px;background:#232427;border-bottom:1px solid #424548;
  scrollbar-width:thin;scrollbar-color:#4a4d51 transparent;-webkit-mask-image:linear-gradient(90deg,#000 92%,transparent);mask-image:linear-gradient(90deg,#000 92%,transparent)}
.lang-chip{flex:none;font:600 .8rem var(--font-body);color:rgba(255,255,255,.72);background:#26282b;border:1px solid #3a3d41;border-radius:999px;
  padding:7px 14px;cursor:pointer;transition:background .2s,color .2s,border-color .2s}
.lang-chip:hover{color:#fff;border-color:#5b5e62}
.lang-chip.active{background:var(--blue-500);border-color:var(--blue-500);color:#fff;box-shadow:0 4px 14px rgba(10,100,218,.45)}
.lang-chip:focus-visible{outline:2px solid var(--blue-300);outline-offset:2px}
.powered{display:inline-flex;align-items:center;gap:8px;margin-top:16px;font-size:.82rem;color:#8EA3CE}
.powered a{color:#fff;font-weight:600;text-decoration:none}
.powered a:hover{text-decoration:underline}
.lab-head{display:flex;justify-content:space-between;align-items:end;gap:40px;margin-bottom:32px}
.lab-head h2{font-size:clamp(1.9rem,3.8vw,3rem)}
.lab-head>p{max-width:440px;font-size:1.04rem}
@media (max-width:900px){.lab-head{flex-direction:column;align-items:flex-start;gap:14px}}
.learn-grid>*,.lesson-layout>*{min-width:0}
.code-embed{min-width:0;max-width:100%}