:root{--ink:#14213d;--muted:#5c677d;--bg:#f6f7fb;--card:#fff;--line:#dde1ea;--acc:#1f6feb;--ok:#1a7f37;--okbg:#e6f6ea;--warn:#b35900;--warnbg:#fff3e0;--bad:#b42318;--badbg:#fdecea;--esp:#8250df;--mat:#1f6feb}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:"Nunito",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--ink);font-size:17px;line-height:1.5}
a{color:var(--acc)}header{background:var(--ink);color:#fff;padding:10px 16px;display:flex;justify-content:space-between;align-items:center;position:sticky;top:0;z-index:5}
header a{color:#fff;text-decoration:none}header .brand{font-weight:800;letter-spacing:.3px}header .who{font-size:14px;opacity:.85}
main{max-width:760px;margin:0 auto;padding:16px 16px 80px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px;margin:0 0 14px}
h1,h2,h3,header .brand{font-family:"Fredoka","Nunito",system-ui,sans-serif;font-weight:600}h1{font-size:24px;margin:4px 0 12px}h2{font-size:20px;margin:0 0 10px}h3{font-size:17px;margin:14px 0 6px}
.btn{display:inline-block;border:0;border-radius:12px;padding:12px 18px;font-size:17px;font-weight:700;background:var(--acc);color:#fff;cursor:pointer;text-decoration:none;text-align:center}
.btn.block{display:block;width:100%;margin:8px 0}.btn.sec{background:#e8eefc;color:var(--acc)}.btn.ghost{background:transparent;color:var(--muted);border:1px solid var(--line)}
.btn.small{padding:8px 12px;font-size:15px}.row{display:flex;gap:8px;flex-wrap:wrap}.row>*{flex:1}
.constancia{margin:0 0 14px}.constancia b{color:var(--acc)}
.muted{color:var(--muted);font-size:15px}.pill{display:inline-block;border-radius:999px;padding:2px 10px;font-size:13px;font-weight:700;background:#eef1f6;color:var(--muted)}
.bar{height:10px;border-radius:6px;background:#e7eaf1;overflow:hidden}.bar>i{display:block;height:100%;background:var(--acc)}
.topic{margin:10px 0}.topic .lbl{display:flex;justify-content:space-between;font-size:15px}
.txt{background:#fbfaf6;border-left:5px solid var(--esp);border-radius:8px;padding:12px 14px;font-family:Georgia,"Times New Roman",serif;font-size:17px;line-height:1.6;margin:0 0 12px}
.gl{font-size:14px;color:var(--muted);font-family:system-ui,sans-serif;margin-top:6px}
.stem{margin:0 0 12px}.fig img{display:block;max-width:100%;height:auto;margin:6px auto 12px}
.tw{max-width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch;margin:6px 0 12px;background:linear-gradient(90deg,var(--card) 30%,hsla(0,0%,100%,0)),linear-gradient(90deg,hsla(0,0%,100%,0),var(--card) 70%) 100% 0,radial-gradient(farthest-side at 0 50%,rgba(20,33,61,.18),transparent),radial-gradient(farthest-side at 100% 50%,rgba(20,33,61,.18),transparent) 100% 0;background-repeat:no-repeat;background-size:40px 100%,40px 100%,14px 100%,14px 100%;background-attachment:local,local,scroll,scroll}
table.dt{border-collapse:collapse;margin:0;font-size:15px}table.dt th,table.dt td{border-bottom:1px solid var(--line);padding:5px 10px;text-align:left}table.dt th{border-bottom:2px solid var(--ink)}
.opts{display:flex;flex-direction:column;gap:8px}
.opt{display:flex;gap:10px;align-items:flex-start;width:100%;text-align:left;background:#fff;border:2px solid var(--line);border-radius:12px;padding:12px 14px;font-size:17px;color:var(--ink);cursor:pointer}
.opt b.l{min-width:22px}.opt:hover{border-color:var(--acc)}.opt[disabled]{cursor:default;opacity:.55}.opt.picked{border-color:var(--acc);background:#eef4ff;opacity:1}
.opt.right{border-color:var(--ok);background:var(--okbg);opacity:1}.opt.wrong{border-color:var(--bad);background:var(--badbg);opacity:1}
.fb{border-radius:12px;padding:12px 14px;margin:14px 0}.fb.ok{background:var(--okbg);border:1px solid #9bd3a8}.fb.warn{background:var(--warnbg);border:1px solid #f0c48a}.fb.bad{background:var(--badbg);border:1px solid #f1a9a2}
.sol{background:#f4f6fb;border-radius:10px;padding:10px 12px;font-size:16px}
.sol p{margin:0 0 8px}.sol p:last-child{margin:0}.sol b{color:var(--acc)}  /* #254 */
.cuaderno{margin:8px 0 0;font-size:15px;color:var(--acc);font-weight:600}
.top{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-bottom:10px;font-size:14px;color:var(--muted)}
.timer{font-variant-numeric:tabular-nums;font-weight:700;color:var(--ink)}
.frac{display:inline-flex;flex-direction:column;vertical-align:middle;text-align:center;font-size:.9em;line-height:1.1;margin:0 .1em}.frac>span:first-child{border-bottom:1px solid currentColor;padding:0 .2em}.frac>span:last-child{padding:0 .2em}
.grid{display:grid;grid-template-columns:repeat(10,1fr);gap:4px}.grid button{padding:6px 0;border:1px solid var(--line);border-radius:6px;background:#fff;font-size:13px;cursor:pointer}.grid button.done{background:#dbe7ff}.grid button.cur{outline:2px solid var(--acc)}
.code{display:inline-block;font-size:12px;font-weight:800;color:#fff;background:var(--muted);border-radius:4px;padding:0 5px;margin-right:4px}
table.k{width:100%;border-collapse:collapse;font-size:15px}table.k td,table.k th{border-bottom:1px solid var(--line);padding:6px 4px;text-align:left;vertical-align:top}
input[type=text],input[type=password],input[type=tel],select{width:100%;font-size:18px;padding:12px;border:1px solid var(--line);border-radius:10px;margin:4px 0 12px;background:#fff}
label{font-weight:600}.err{color:var(--bad);font-weight:600}
textarea{width:100%;font-family:inherit;font-size:17px;padding:12px;border:1px solid var(--line);border-radius:10px;margin:4px 0 12px;background:#fff;resize:vertical}
.pie{text-align:center;margin:18px 0 8px;font-size:15px}.pie a{color:var(--muted)}
.rep{border-left:4px solid var(--line);padding:4px 0 4px 10px;margin:0 0 12px}.rep.nuevo{border-left-color:var(--acc)}.rep p{margin:4px 0;white-space:pre-wrap}
details summary{cursor:pointer;font-weight:700;color:var(--acc)}
@media (max-width:420px){body{font-size:16px}.grid{grid-template-columns:repeat(8,1fr)}
  .card{padding:12px}table.dt{font-size:14px}table.dt th,table.dt td{padding:5px 7px}}

.grafico{margin:0 0 14px}
.panel-grupo{display:flex;gap:14px;align-items:flex-start}
.panel-grupo>.resumen{flex:2;min-width:0}.panel-grupo>.lista{flex:1;min-width:0}
.k-list{list-style:none;margin:0;padding:0}
.k-list li{border-bottom:1px solid var(--line);padding:8px 0}.k-list li:last-child{border-bottom:0}
.k-list a{display:flex;flex-direction:column;gap:2px;text-decoration:none;color:var(--ink)}
.pestanas{display:flex;gap:6px;margin:0 0 14px}
.pestanas a{flex:1;text-align:center;padding:9px 6px;border:1px solid var(--line);border-radius:10px;background:var(--card);color:var(--ink);text-decoration:none;font-size:.9rem}
.pestanas a.activa{border-color:var(--acc);color:var(--acc);font-weight:700}
.pane{display:none}.pane.activa{display:block}
@media (max-width:680px){.panel-grupo{flex-direction:column}}
.ok-msg{background:#e8f5ec;border:1px solid #bfe0c9;border-radius:8px;padding:10px;margin:0 0 10px}
.enlace{font-size:.72rem;word-break:break-all;margin-top:4px}
.btn.small{width:auto;padding:4px 10px;font-size:.8rem}
.gl-w.visto{border-bottom:2px dotted var(--acc);cursor:pointer}
/* #248: como en el examen impreso, la palabra con glosa lleva un asterisco y la definición va
   al pie siempre. El asterisco es CSS: el texto sigue idéntico letra por letra (hay pruebas). */
.gl-w::after,.w[data-def]::after{content:"*";color:var(--muted);font-size:.85em;vertical-align:super;line-height:0}
/* `.w` envuelve CADA palabra del texto y NO lleva estilo: el niño toca la que no
   entiende, no la que está resaltada, y el texto se ve igual al del examen (#120).
   El punteado aparece recién después de tocarla, como señal de que quedó anotada. */
.w.visto{border-bottom:2px dotted var(--acc)}
.gl-bubble.anotada{background:#f6f3ea;color:var(--muted);font-style:italic}
.gl-bubble{display:block;background:#eef1f6;border:1px solid var(--line);border-radius:8px;padding:8px 10px;font-size:14px;color:var(--ink);margin:4px 0}
.papel{font-size:.85em}
.papel-resumen{font-size:15px;color:var(--muted)}
.nota-papel{border-left:4px solid var(--line);padding:4px 0 4px 10px;margin:0 0 12px}
.nota-papel p{margin:4px 0;white-space:pre-wrap}


/* #129: el método de 4 pasos antes de practicar */
.metodo .lema { color: var(--muted); margin: 4px 0 10px; }
.metodo .pasos { list-style: none; margin: 0 0 12px; padding: 0; display: grid; grid-template-columns: 1fr; gap: 8px; }
.metodo .pasos li { display: grid; grid-template-columns: 28px 1fr; column-gap: 8px; align-items: center;
  border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; max-width: 360px; line-height: 1.4;
  overflow-wrap: anywhere; }
.metodo .pasos .num { grid-row: 1; grid-column: 1; width: 28px; height: 28px; border-radius: 50%;
  background: var(--ink); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: bold; }
.metodo .pasos li b { grid-row: 1; grid-column: 2; }
.metodo .pasos li > span:last-child { grid-column: 1 / -1; margin-top: 4px; }
.metodo .rapidas { background: var(--warnbg); border: 1px solid #e6c84a; border-radius: 8px; padding: 8px 12px; }
.metodo .rapidas ol { margin: 6px 0 0; padding-left: 1.3em; }
.metodo .rapidas li { margin: 4px 0; line-height: 1.4; }
@media (min-width: 480px) { .metodo .pasos { grid-template-columns: 1fr 1fr; } }
.recordatorio { margin: 10px 0; opacity: .85; }
.consejo { border-left: 4px solid var(--acc); }

/* #82: resaltar y tachar oraciones del texto, como con lápiz */
.marcas{display:flex;align-items:center;gap:8px;margin:0 0 8px;flex-wrap:wrap}
.marcas .muted{font-size:.85rem}
button.marca.activo{background:var(--acc);color:#fff;border-color:var(--acc)}
.o.res{background:#fff3a3;border-radius:3px}
.o.tach{text-decoration:line-through;opacity:.5}
body[data-marca] .o{cursor:pointer}
.flotante{position:fixed;right:14px;bottom:14px;z-index:50;background:var(--acc);color:#fff;border-radius:999px;padding:10px 16px;font-weight:700;text-decoration:none;box-shadow:0 4px 14px rgba(0,0,0,.25);font-size:16px}
.flotante:active{transform:scale(.97)}
/* #225: vista para la familia */
.lema{color:var(--muted);margin:0 0 14px}
.en-casa{background:var(--warnbg);border-left:4px solid #e6c84a;padding:8px 12px;border-radius:0 8px 8px 0;margin:6px 0 12px}
.pregunta{border-left:4px solid var(--line);padding:4px 0 4px 10px;margin:0 0 12px}.pregunta p{margin:4px 0}
.hoy-casa{background:var(--okbg);border:1px solid var(--ok);border-radius:10px;padding:10px 12px;font-weight:600}
.familia{text-align:center;margin:6px 0 14px}.familia a{display:inline-block;border:1px dashed var(--acc);border-radius:12px;padding:10px 14px;text-decoration:none;font-weight:600}
details.pregunta summary{cursor:pointer;font-weight:600}
.completa{margin-top:8px;border-top:1px solid var(--line);padding-top:8px}
.opcion{padding:6px 8px;border-radius:8px;margin:4px 0}
.opcion.elegida{background:var(--badbg)}
.opcion.correcta{background:var(--okbg)}
.opcion.elegida.correcta{background:var(--okbg)}
.marca-op{font-size:13px;color:var(--muted);font-weight:700}

/* #226: inicio */
main:has(.inicio-wide){max-width:1100px}
.inicio{display:grid;gap:14px;grid-template-columns:1fr}
.izq,.der{display:flex;flex-direction:column;gap:14px;min-width:0}
@media (min-width:820px){.inicio{grid-template-columns:1fr 1fr}}
@media (min-width:1100px){.inicio{grid-template-columns:380px 1fr;gap:18px}}
.acum{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}
.tile{background:var(--warnbg);border-radius:16px;padding:12px 6px;text-align:center;display:flex;flex-direction:column;min-width:0}
.tile .big{font-family:"Fredoka","Nunito",system-ui,sans-serif;font-size:30px;font-weight:600;line-height:1.2;font-variant-numeric:tabular-nums}
.tile .big small{font-size:16px}
.tile .lbl{font-size:12px;text-transform:uppercase;color:var(--warn);font-weight:800}
.tile .sub{font-size:12px;color:var(--muted)}
.sig{background:#e3edfd;border:2px solid var(--acc);border-radius:20px;padding:16px;min-width:0}
.sig .eyebrow{font-size:12px;text-transform:uppercase;color:var(--acc);font-weight:800}
.sig h2{font-size:22px;margin:4px 0 6px}
.sig .hoy{display:block;font-size:13px;font-weight:700}
.logros{display:flex;gap:8px;overflow-x:auto;padding-bottom:4px}
@media (min-width:820px){.logros{flex-wrap:wrap;overflow-x:visible}}
.logro{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);background:var(--card);border-radius:999px;padding:4px 12px 4px 4px;font-size:14px;font-weight:700;white-space:nowrap}
.logro.no{opacity:.55}
.logro i{font-style:normal;width:26px;height:26px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-size:14px;background:var(--line)}
.logro.si i{background:var(--okbg)}
.materia header{background:none;color:inherit;position:static;padding:0;display:flex;justify-content:space-between;align-items:center;gap:8px;margin-bottom:8px}
.materia header h3{margin:0}
.materia .pct{font-size:13px;color:var(--muted);font-weight:700}
.materia.mat h3{color:var(--mat)}.materia.esp h3{color:var(--esp)}
.materia.mat .bar i{background:var(--mat)}.materia.esp .bar i{background:var(--esp)}
.lineas{list-style:none;margin:10px 0;padding:0;overflow-wrap:anywhere}
.lineas li{display:flex;gap:8px;align-items:baseline;margin:6px 0}
.lineas li>span{min-width:0}
.lineas .k{flex:none;font-size:12px;text-transform:uppercase;font-weight:800;border-radius:8px;padding:2px 8px}
.lineas .bien .k{background:var(--okbg);color:var(--ok)}
.lineas .ref .k{background:var(--warnbg);color:var(--warn)}