/* Pupitre — lector por páginas (materia, clase del colegio y tema Saber 11). Prefijo lc-.
   Columna de lectura centrada (~68 caracteres, 16–17 px), barra inferior fija sobre la barra de pestañas del celular,
   barra de progreso arriba e índice como panel lateral en pantallas anchas. Colores sólo con tokens de app.css. */
.lc,.lc-tinte{--lc-c:var(--tint,var(--accent));--lc-cs:var(--tint-soft,var(--accent-soft))}
.lc{--lc-top:61px;--lc-bot:16px}
.lc-grid{display:grid;grid-template-columns:minmax(0,760px);justify-content:center;gap:28px;align-items:start}
.lc-col{display:flex;flex-direction:column;gap:14px;min-width:0}
.lc-aside{display:none}

/* barra de progreso fina (pegada bajo la barra superior) */
.lc-prog{position:sticky;top:calc(var(--lc-top) + env(safe-area-inset-top,0px));z-index:14;height:4px;border-radius:0 0 4px 4px;background:var(--line);overflow:hidden;margin-bottom:-2px}
.lc-prog > i{display:block;height:100%;width:0;background:var(--lc-c);border-radius:0 4px 4px 0;transition:width .3s ease}
.lc-prog > b{position:absolute;top:0;bottom:0;width:2px;margin-left:-1px;background:var(--bg)}

/* escenario y página */
.lc-celebra:empty{display:none}
/* alto mínimo: la barra inferior queda al pie de la pantalla aunque la página sea corta
   (92 px = barra de progreso + separaciones + alto de la barra) */
.lc-stage{display:flex;flex-direction:column;min-height:calc(100vh - var(--lc-top) - var(--lc-pt,24px) - var(--lc-bot) - 92px);min-height:calc(100dvh - var(--lc-top) - var(--lc-pt,24px) - var(--lc-bot) - 92px);padding:0 4px;margin:0 -4px;overflow-x:hidden;overflow-x:clip}
.lc-page{flex:1 0 auto;display:flex;flex-direction:column;gap:20px;min-width:0}
.lc-page.card{padding:30px 34px 22px}
.lc-in-n{animation:lcInN .24s cubic-bezier(.2,.7,.3,1)}
.lc-in-p{animation:lcInP .24s cubic-bezier(.2,.7,.3,1)}
@keyframes lcInN{from{opacity:0;transform:translateX(32px)}to{opacity:1;transform:none}}
@keyframes lcInP{from{opacity:0;transform:translateX(-32px)}to{opacity:1;transform:none}}

/* números de unidad */
.lc-n{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;flex:none;background:var(--lc-cs);color:var(--lc-c);font-family:var(--f-head);font-weight:700;font-size:14px}
.lc-n[data-hecha="true"]{background:var(--lc-c);color:var(--on-accent)}
.lc-n-lg{width:44px;height:44px;border-radius:13px;font-size:18px;margin-top:2px}

/* encabezados de página */
.lc-uh{display:flex;gap:14px;align-items:flex-start}
.lc-uh .tx{min-width:0}
.lc-uh .eyebrow,.lc-ph .eyebrow{color:var(--lc-c)}
.lc-uh h2,.lc-ph h2{margin:4px 0 0;font-size:26px;font-weight:600;line-height:1.2;letter-spacing:-.015em;text-wrap:balance}
.lc-ph{display:flex;flex-direction:column}
.lc-ph-p{margin:8px 0 0;color:var(--ink-2);font-size:15px;line-height:1.55;max-width:62ch}
.lc-ey-caso{display:flex;align-items:center;gap:6px}

/* texto de estudio: 17 px, interlineado amplio, ~68 caracteres por línea */
.lc-prose{max-width:68ch;font-size:17px;line-height:1.78;color:var(--ink-2)}
.lc-prose p{margin:0 0 1.05em}
.lc-prose h3{font-size:20px;margin:1.4em 0 .45em}
.lc-prose h3:first-child{margin-top:0}
.lc-prose ul,.lc-prose ol{margin:0 0 1.05em;padding-left:1.35em}
.lc-prose li{margin:0 0 .5em;padding-left:.2em}
.lc-prose li::marker{color:var(--lc-c);font-weight:700}
.lc-prose strong{color:var(--ink)}
.lc-prose > :last-child{margin-bottom:0}
.lc-nota{display:flex;gap:8px;align-items:center;color:var(--muted);font-size:14.5px;padding:14px 16px;border-radius:12px;background:var(--soft)}
.lc-mini{margin:0;font-size:14.5px}

/* caso práctico / ejercicio resuelto */
.lc-caso{border:1px solid var(--line);border-left:4px solid var(--lc-c);background:var(--soft);border-radius:4px var(--r) var(--r) 4px;padding:20px 24px}
.lc-caso .lc-prose{font-size:16.5px;line-height:1.74}

/* repaso: ideas clave, glosario y marcar */
.lc-sub-h{display:flex;align-items:center;gap:8px;font-weight:700;font-size:12px;letter-spacing:.07em;text-transform:uppercase;color:var(--lc-c);margin-bottom:10px}
.lc-clave{border-radius:14px;background:var(--lc-cs);padding:16px 18px;max-width:72ch}
.lc-clave ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.lc-clave li{display:flex;gap:10px;align-items:flex-start;font-size:16px;line-height:1.55;color:var(--ink)}
.lc-clave li svg{color:var(--lc-c);margin-top:4px}
.lc-glo .lc-sub-h{color:var(--muted)}
.lc-glo .glosario dt{font-size:14.5px}
.lc-glo .glosario dd{font-size:14px;line-height:1.5;color:var(--ink-2)}
.lc-marca{display:flex;align-items:center;justify-content:space-between;gap:12px 16px;flex-wrap:wrap;padding:16px 18px;border-radius:16px;border:1.5px dashed color-mix(in srgb,var(--lc-c) 50%,var(--line));background:var(--card);margin-top:4px}
.lc-marca[data-hecha="true"]{border:1.5px solid transparent;background:var(--pos-soft)}
.lc-marca-tx{display:flex;flex-direction:column;align-items:flex-start;gap:3px;min-width:0;flex:1 1 220px}
.lc-marca-tx b{font-size:15.5px}
.lc-marca-tx small{color:var(--ink-2);font-size:13.5px;line-height:1.45}
.lc-marca-acc{display:flex;align-items:center;gap:10px;flex-wrap:wrap}

/* pie de página */
.lc-pf{display:flex;align-items:center;gap:10px;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:14px;margin-top:auto;color:var(--muted);font-size:13px;font-weight:600}

/* barra inferior de navegación */
.lc-bar{position:sticky;bottom:var(--lc-bot);z-index:14;display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:8px;padding:7px;border:1px solid var(--line);border-radius:18px;background:var(--card);background:color-mix(in srgb,var(--card) 90%,transparent);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);box-shadow:0 12px 30px -12px rgba(15,23,42,.28)}
.lc-bar .btn{min-height:44px;border-radius:12px;padding:8px 14px}
.lc-bar .btn:disabled{opacity:.35}
.lc-bar[data-voz="si"]{grid-template-columns:auto auto minmax(0,1fr) auto}
.lc-bar[data-voz="no"] .lc-voz{display:none}
.lc-vozp{grid-column:1/-1;min-width:0}
.lc-vozp[hidden]{display:none}
.lc-bar .lc-voz{padding:8px 12px}
.lc-voz[aria-pressed="true"]{background:var(--accent-soft);color:var(--accent)}
.lc-ind{display:flex;align-items:center;justify-content:center;gap:10px;min-width:0;border:0;background:none;border-radius:12px;padding:4px 8px;min-height:44px;color:var(--ink)}
.lc-ind:hover{background:var(--soft)}
.lc-ind-ic{min-width:32px;height:32px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;gap:6px;background:var(--lc-cs);color:var(--lc-c);flex:none}
.lc-ind-ic em{display:none;font-style:normal;font-weight:700;font-size:13px}
.lc-page:focus{outline:none}
.lc-ind-tx{display:flex;flex-direction:column;align-items:flex-start;line-height:1.2;min-width:0;text-align:left}
.lc-ind-tx b{font-size:13.5px;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%}
.lc-ind-tx small{font-size:12px;color:var(--muted);font-weight:600;white-space:nowrap}
@media (min-width:700px){
  .lc-ind-tx{flex-direction:row;align-items:baseline;gap:6px}
  .lc-ind-tx small::before{content:"· "}
  .lc-ind-tx small{font-size:13px}
  .lc-ind-ic{padding:0 11px}
  .lc-ind-ic em{display:inline}
}

/* portada */
.lc-page[data-tipo="portada"],.lc-page[data-tipo="final"]{gap:16px}
.lc-cab{display:flex;flex-direction:column;gap:12px;padding:6px 0 6px}
.lc-cab-ey{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-weight:600;font-size:13.5px;color:var(--lc-c)}
.lc-cab-ey .ic-tile{width:30px;height:30px;border-radius:9px}
.lc-tags{display:flex;gap:6px;flex-wrap:wrap}
.lc-cab h1{margin:0;font-size:clamp(28px,3.6vw,40px);font-weight:700;line-height:1.08;letter-spacing:-.025em;text-wrap:balance}
.lc-lead{margin:0;font-size:17px;line-height:1.6;color:var(--ink-2);max-width:66ch}
.lc-cta{display:flex;gap:10px;flex-wrap:wrap;margin-top:6px}
.lc-tip{margin:0;display:flex;gap:7px;align-items:flex-start;font-size:12.5px;color:var(--muted);line-height:1.45}
.lc-tip svg{margin-top:1px}
.lc-obj{padding:20px 22px;display:flex;flex-direction:column;gap:14px;background:linear-gradient(180deg,var(--lc-cs),var(--card) 120px)}
.lc-obj-h{display:flex;gap:12px;align-items:center}
.lc-obj-h .ic-tile{width:40px;height:40px;border-radius:12px;background:var(--card);color:var(--lc-c);border:1px solid var(--line)}
.lc-obj-h h2{margin:2px 0 0;font-size:18px;font-weight:600;letter-spacing:-.01em}
.lc-obj .objetivos{font-size:15.5px;color:var(--ink-2);gap:10px}
.lc-obj .objetivos li svg{color:var(--lc-c)}
.lc-mapa{padding:18px 16px 8px}
.lc-mapa-h{display:flex;align-items:flex-end;justify-content:space-between;gap:10px;flex-wrap:wrap;padding:0 4px 10px}
.lc-mapa-h h2{margin:2px 0 0;font-size:18px;font-weight:600;letter-spacing:-.01em}
.lc-mapa-l{list-style:none;margin:0;padding:0}
.lc-mapa-l li + li{border-top:1px solid var(--line)}
.lc-mapa-l button{display:flex;align-items:center;gap:12px;width:100%;border:0;background:none;text-align:left;padding:12px 6px;border-radius:12px;color:var(--ink)}
.lc-mapa-l button:hover{background:var(--soft)}
.lc-mapa-l button > svg:last-child{color:var(--muted)}
.lc-mapa-t{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px}
.lc-mapa-t b{font-weight:600;font-size:15px;line-height:1.3}
.lc-mapa-t small{font-size:12.5px;color:var(--muted)}
.lc-mapa-l [data-st="act"]{background:var(--lc-cs)}

/* página final: quiz y aprobación */
.lc-fin-g{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;align-items:start}
.lc-pend{display:flex;flex-direction:column;gap:4px}
.lc-pend .lc-sub-h{margin-bottom:4px;color:var(--ink-2)}
.lc-pend-b{display:flex;align-items:center;gap:10px;border:0;background:none;padding:8px 6px;border-radius:10px;text-align:left;width:100%;color:var(--ink);font-weight:600;font-size:14.5px}
.lc-pend-b:hover{background:var(--soft)}
.lc-pend-b > span:nth-child(2){flex:1;min-width:0}
.lc-pend-b > svg:last-child{color:var(--muted)}
.lc-tut{display:flex;align-items:center;gap:14px;flex-wrap:wrap;background:linear-gradient(180deg,var(--info-soft),var(--card))}
.lc-tut .ic-tile{background:var(--card);color:var(--info);border:1px solid var(--line)}
.lc-tut > div{flex:1 1 200px;min-width:0;display:flex;flex-direction:column;gap:2px}
.lc-tut > div small{font-size:13px}
.lc-quiz{padding-top:4px}

/* panel lateral (pantallas anchas) */
.lc-av{display:flex;flex-direction:column;gap:12px;flex:none}
.lc-av-top{display:flex;align-items:center;gap:12px}
.lc-av-top b{display:block;font-size:16px}
.lc-av-top small{display:block;font-size:12.5px;line-height:1.4}
.lc-ring{width:52px;height:52px}
.lc-ring > span{font-size:11.5px;width:calc(100% - 10px);height:calc(100% - 10px)}
.lc-av-q{display:flex;justify-content:space-between;align-items:baseline;font-size:13px;color:var(--muted);padding-top:10px;border-top:1px solid var(--line)}
.lc-av-q b{font-size:18px}
.lc-av-acc{display:flex;flex-direction:column;gap:8px}
.lc-av-acc:empty{display:none}
.lc-idx-card{padding:14px 8px 8px;min-height:0;display:flex;flex-direction:column;flex:0 1 auto}
.lc-idx-lbl{padding:0 10px 8px;font-size:11px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.lc-idx-sc{overflow-y:auto;min-height:0;scrollbar-width:thin;padding:0 2px}

/* índice (hoja y panel) */
.lc-ix-sheet{display:flex;flex-direction:column;gap:14px}
.lc-ix-w{display:flex;flex-direction:column;gap:2px}
.lc-ix{display:flex;align-items:center;gap:10px;width:100%;border:0;background:none;text-align:left;padding:8px;border-radius:10px;font-size:13.5px;color:var(--ink-2);line-height:1.35}
.lc-ix:hover{background:var(--soft);color:var(--ink)}
.lc-ix[aria-current="page"]{background:var(--lc-cs);color:var(--ink);font-weight:700}
.lc-ix-n{min-width:22px;font-size:11.5px;font-weight:700;color:var(--muted);text-align:right;flex:none}
.lc-ix[aria-current="page"] .lc-ix-n{color:var(--lc-c)}
.lc-ix-t{min-width:0;flex:1}
.lc-ix-u{display:flex;flex-direction:column;margin-top:4px}
.lc-ix-uh{display:flex;align-items:center;gap:10px;width:100%;border:0;background:none;text-align:left;padding:8px;border-radius:10px;color:var(--ink)}
.lc-ix-uh:hover{background:var(--soft)}
.lc-ix-uh .lc-n{width:28px;height:28px;border-radius:8px;font-size:12.5px}
.lc-ix-ut{min-width:0;display:flex;flex-direction:column}
.lc-ix-ut b{font-size:14px;font-weight:600;line-height:1.3}
.lc-ix-ut small{font-size:11.5px;color:var(--muted)}
.lc-ix-u ol{list-style:none;margin:0 0 4px 21px;padding:0 0 0 8px;display:flex;flex-direction:column;gap:1px;border-left:2px solid var(--line)}
.lc-ix-u[data-act="true"] ol{border-left-color:var(--lc-c)}
.lc-ix-c .lc-ix-u:not([data-act]) ol{display:none}
.lc-ix-c .lc-ix{padding:6px 8px;font-size:13px}
.lc-ix-c .lc-ix-ut b{font-size:13.5px}
.lc-ix-sheet .lc-ix{padding:10px 8px;font-size:14.5px}

/* vista de profesor(a): sin avance ni nota */
.lc-prof{display:flex;flex-direction:column;gap:12px;background:linear-gradient(180deg,var(--info-soft),var(--card) 120px)}
.lc-prof p{margin:0;color:var(--ink-2);font-size:14.5px;line-height:1.55;max-width:62ch}
.lc-prof .lc-obj-h .ic-tile{color:var(--info)}
.lc-av-ic{width:44px;height:44px;background:var(--lc-cs);color:var(--lc-c)}

/* los avisos no tapan la barra de páginas */
body:has(.lc-bar) .toasts{bottom:var(--lc-toast,92px)}

/* tutor IA dentro de la hoja */
.lc-tsheet .cr-tutor,.lc-tsheet .pr-tutor{border:0;padding:0;background:none;border-radius:0;box-shadow:none}
.lc-tsheet .cr-tutor-h h2,.lc-tsheet .pr-tutor-h h2{display:none}
.lc-tsheet .cr-chat{max-height:none}

/* pantallas anchas: índice como panel lateral */
@media (min-width:1280px){
  .lc-grid{grid-template-columns:minmax(0,760px) 272px}
  .lc-aside{display:flex;flex-direction:column;gap:12px;position:sticky;top:calc(var(--lc-top) + 20px);max-height:calc(100vh - var(--lc-top) - 40px);min-width:0}
}
@media (max-width:720px){
  .lc-fin-g{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:560px){
  .lc-page.card{padding:6px 0 0;border:0;border-radius:0;background:none}
  .lc-page{gap:18px}
  .lc-uh h2,.lc-ph h2{font-size:22px}
  .lc-n-lg{width:38px;height:38px;font-size:16px}
  .lc-prose{font-size:16.5px;line-height:1.75}
  .lc-prose h3{font-size:18.5px}
  .lc-caso{padding:14px 14px 14px 16px}
  .lc-caso .lc-prose{font-size:16px}
  .lc-clave li{font-size:15.5px}
  .lc-cab h1{font-size:28px}
  .lc-lead{font-size:16px}
  .lc-cta .btn{flex:1 1 100%}
  .lc-obj{padding:16px}
  .lc-obj .objetivos{font-size:15px}
  .lc-mapa{padding:14px 10px 6px}
  .lc-marca{padding:14px}
  .lc-marca-acc{width:100%}
  .lc-marca-acc .btn{flex:1 1 auto}
  .lc-tut .btn{width:100%}
  .lc-bar{border-radius:16px;padding:6px;gap:4px}
  .lc-bar .btn{padding:8px 12px}
  .lc-prev span,.lc-voz span{display:none}
  .lc-ind{padding:4px 2px;gap:8px}
  .lc-ind-ic{min-width:30px;height:30px}
}
@media (prefers-reduced-motion:reduce){
  .lc-in-n,.lc-in-p{animation:none}
  .lc-prog > i{transition:none}
}