/* ============================================================
   notion.css — páginas de contenido: teoría, ejercicios, mapa
   ============================================================ */

.pagina {
  max-width: 860px;
  margin: 0 auto;
  padding: 40px 34px 140px;
  position: relative;
  z-index: 1;
}
.pagina.estrecha { max-width: 680px; }
.pagina.center { text-align: center; }

/* ---------------------------------------------------------- cabecera */

.pg-hero {
  display: flex; align-items: flex-start; gap: 20px;
  margin-bottom: 30px;
  padding-bottom: 26px;
  border-bottom: 1px solid var(--line-soft);
}
.pg-hero-ico {
  font-size: 46px; line-height: 1;
  flex: 0 0 auto;
  filter: drop-shadow(0 6px 18px rgba(0,0,0,.5));
}
.pg-kicker {
  font-size: 11px; font-weight: 800; letter-spacing: .13em;
  text-transform: uppercase; color: var(--sec-color, var(--text-3));
  margin-bottom: 6px;
}
.pg-titulo {
  font-family: var(--font-display);
  font-size: clamp(30px, 4.4vw, 44px);
  line-height: 1.12; margin: 0 0 10px;
  letter-spacing: -.02em; font-weight: 700;
}
.pg-resumen { margin: 0; color: var(--text-2); font-size: 16.5px; max-width: 62ch; }

/* ---------------------------------------------------------- índice */

.pg-toc {
  background: var(--surface);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin-bottom: 34px;
}
.toc-label {
  font-size: 11px; font-weight: 800; letter-spacing: .1em;
  text-transform: uppercase; color: var(--text-3);
  display: block; margin-bottom: 9px;
}
.toc-chips { display: flex; flex-wrap: wrap; gap: 6px; }

.chip-ref {
  display: inline-flex; align-items: center;
  padding: 3px 9px;
  border-radius: 99px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  font-size: 12px; font-weight: 600;
  color: var(--text-2);
  text-decoration: none;
  white-space: nowrap;
  transition: background .13s, color .13s, border-color .13s, transform .13s;
}
.chip-ref:hover {
  background: var(--surface-3); color: var(--text);
  border-color: var(--sec-color, var(--mint));
  text-decoration: none; transform: translateY(-1px);
}

/* ---------------------------------------------------------- texto */

.pg-cuerpo > * + * { margin-top: 22px; }

.pg-h2 {
  font-family: var(--font-display);
  font-size: 25px; font-weight: 700;
  margin: 46px 0 4px;
  letter-spacing: -.01em;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line-soft);
}
.pg-h3 { font-size: 18px; margin: 30px 0 12px; font-weight: 650; }

.pg-p p, .pagina p { margin: 0 0 14px; }
.pg-p p:last-child { margin-bottom: 0; }
.pagina li { margin-bottom: 6px; }
.pagina ul, .pagina ol { padding-left: 22px; margin: 10px 0; }

.pagina code {
  font-family: var(--font-mono); font-size: .88em;
  background: var(--surface-2); border: 1px solid var(--line-soft);
  border-radius: 5px; padding: 1px 5px;
  color: var(--gold-soft);
}
.pagina strong { color: #fff; font-weight: 650; }
.pagina em { color: var(--text-2); }

.pg-quote {
  margin: 0; padding: 18px 24px;
  border-left: 3px solid var(--gold);
  background: linear-gradient(90deg, rgba(242,193,78,.06), transparent);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-family: var(--font-display);
  font-size: 17px; font-style: italic;
  color: var(--text-2);
}
.pg-quote cite {
  display: block; margin-top: 10px;
  font-family: var(--font); font-style: normal;
  font-size: 13px; color: var(--text-3);
}

/* ---------------------------------------------------------- callouts */

.pg-callout {
  display: flex; gap: 14px;
  padding: 16px 18px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--surface);
}
.pg-callout.tono-idea   { border-color: rgba(62,224,165,.32);  background: linear-gradient(180deg, rgba(62,224,165,.07), transparent); }
.pg-callout.tono-trampa { border-color: rgba(255,77,109,.34);  background: linear-gradient(180deg, rgba(255,77,109,.07), transparent); }
.pg-callout.tono-ojo    { border-color: rgba(76,201,240,.32);  background: linear-gradient(180deg, rgba(76,201,240,.07), transparent); }
.cal-ico { font-size: 20px; line-height: 1.4; flex: 0 0 auto; }
.cal-cuerpo { flex: 1; min-width: 0; }
.cal-cuerpo p:last-child { margin-bottom: 0; }
.cal-tit { font-weight: 700; margin-bottom: 6px; font-size: 14.5px; }
.tono-idea .cal-tit { color: var(--mint); }
.tono-trampa .cal-tit { color: var(--red); }
.tono-ojo .cal-tit { color: var(--blue); }

/* ---------------------------------------------------------- tarjetas de teorema */

.pg-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  overflow: hidden;
  scroll-margin-top: 80px;
  transition: border-color .3s, box-shadow .3s;
}
.pg-card.destacado {
  border-color: var(--gold);
  box-shadow: var(--glow-gold);
  animation: destacar 2.2s var(--ease);
}
@keyframes destacar {
  0%, 100% { box-shadow: none; }
  20%, 60% { box-shadow: 0 0 0 3px rgba(242,193,78,.25), var(--glow-gold); }
}

.card-cab {
  display: flex; align-items: baseline; gap: 10px;
  padding: 14px 18px 10px;
  background: linear-gradient(180deg, rgba(255,255,255,.03), transparent);
  border-bottom: 1px solid var(--line-soft);
}
.card-cab h3 { margin: 0; font-size: 16.5px; font-weight: 650; flex: 1; }
.card-tag {
  font-size: 11px; font-weight: 800; letter-spacing: .06em;
  text-transform: uppercase;
  padding: 3px 8px; border-radius: 6px;
  white-space: nowrap;
}
.k-teorema     .card-tag { background: rgba(242,193,78,.16); color: var(--gold); }
.k-lema        .card-tag { background: rgba(76,201,240,.16); color: var(--blue); }
.k-corolario   .card-tag { background: rgba(139,108,255,.18); color: var(--violet); }
.k-propiedad   .card-tag { background: rgba(62,224,165,.16); color: var(--mint); }
.k-observacion .card-tag { background: rgba(255,154,60,.16); color: #ff9a3c; }
.k-def         .card-tag { background: rgba(255,255,255,.09); color: var(--text-2); }

.k-teorema     { border-left: 3px solid var(--gold); }
.k-lema        { border-left: 3px solid var(--blue); }
.k-corolario   { border-left: 3px solid var(--violet); }
.k-propiedad   { border-left: 3px solid var(--mint); }
.k-observacion { border-left: 3px solid #ff9a3c; }
.k-def         { border-left: 3px solid var(--text-3); }

.card-ancla {
  opacity: 0; font-size: 13px; text-decoration: none;
  transition: opacity .15s;
}
.pg-card:hover .card-ancla { opacity: .5; }
.card-ancla:hover { opacity: 1 !important; text-decoration: none; }

.card-cuerpo { padding: 16px 18px; }
.card-cuerpo p:last-child { margin-bottom: 0; }
.card-cuerpo.enunciado { font-size: 16px; }

.card-idea, .card-trampa, .card-intuicion {
  margin: 0 18px 16px;
  padding: 11px 14px;
  border-radius: var(--radius-sm);
  font-size: 14.5px;
  line-height: 1.6;
}
.card-idea      { background: rgba(62,224,165,.08); border: 1px solid rgba(62,224,165,.2); }
.card-trampa    { background: rgba(255,77,109,.08); border: 1px solid rgba(255,77,109,.2); }
.card-intuicion { background: var(--surface-2); border: 1px solid var(--line-soft); }
.card-idea b { color: var(--mint); }
.card-trampa b { color: var(--red); }

.card-demo {
  margin: 0 18px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  overflow: hidden;
}
.card-demo summary {
  padding: 10px 14px;
  cursor: pointer;
  font-weight: 600; font-size: 14px;
  list-style: none;
  user-select: none;
  transition: background .13s;
}
.card-demo summary::-webkit-details-marker { display: none; }
.card-demo summary:hover { background: var(--surface-3); }
.det-flecha { display: inline-block; transition: transform .2s var(--ease); color: var(--text-3); }
.card-demo[open] .det-flecha { transform: rotate(90deg); }

.demo-pasos {
  margin: 0; padding: 4px 20px 16px 38px;
  counter-reset: paso;
}
.demo-pasos li {
  margin-bottom: 12px;
  font-size: 14.5px; line-height: 1.65;
  color: var(--text-2);
}
.demo-pasos li::marker { color: var(--gold); font-weight: 700; }
.demo-pasos li:last-child { margin-bottom: 0; }

.card-usa {
  display: flex; align-items: center; flex-wrap: wrap; gap: 6px;
  padding: 11px 18px;
  border-top: 1px solid var(--line-soft);
  background: rgba(0,0,0,.16);
  font-size: 12px;
}

/* ---------------------------------------------------------- tablas */

.pg-tabla-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}
.pg-tabla { width: 100%; border-collapse: collapse; font-size: 14.5px; min-width: 460px; }
.pg-tabla th {
  text-align: left; padding: 11px 14px;
  font-size: 11px; font-weight: 800; letter-spacing: .07em; text-transform: uppercase;
  color: var(--text-3);
  background: rgba(255,255,255,.03);
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
.pg-tabla td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--line-soft);
  vertical-align: top;
  color: var(--text-2);
}
.pg-tabla tbody tr:last-child td { border-bottom: none; }
.pg-tabla tbody tr:hover { background: rgba(255,255,255,.022); }
.pg-tabla td:first-child { color: var(--text); font-weight: 550; }

/* ---------------------------------------------------------- visualizaciones */

.pg-viz {
  margin: 30px 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--surface-2), var(--surface));
}
.viz-tit {
  font-weight: 700; font-size: 15px; margin-bottom: 12px;
  display: flex; align-items: center; gap: 8px;
}
.viz-tit::before { content: "📐"; }
.viz-pie { margin-top: 12px; font-size: 13px; color: var(--text-3); line-height: 1.55; }
.viz-host { }
.viz-svg { width: 100%; height: auto; display: block; }
.viz-etq { font-size: 10.5px; fill: var(--text-3); font-family: var(--font); }

.viz-ctrl {
  display: flex; align-items: center; gap: 12px;
  margin-top: 14px;
  padding: 10px 12px;
  background: var(--surface-3);
  border-radius: var(--radius-sm);
}
.viz-btn {
  width: 30px; height: 30px; flex: 0 0 30px;
  border-radius: 8px;
  background: var(--surface);
  border: 1px solid var(--line);
  font-size: 17px; font-weight: 700;
  display: grid; place-content: center;
  transition: background .13s, transform .1s;
}
.viz-btn:hover { background: var(--felt-500); transform: translateY(-1px); }
.viz-ctrl-txt { min-width: 128px; font-size: 13px; }
.viz-ctrl-txt b { font-size: 17px; color: var(--gold); margin-right: 6px; font-variant-numeric: tabular-nums; }
.viz-ctrl-txt span { color: var(--text-3); }
.viz-ctrl input[type=range] { flex: 1; accent-color: var(--gold); }

.viz-info {
  display: flex; flex-wrap: wrap; gap: 8px 18px;
  margin-top: 12px;
  font-size: 12.5px; color: var(--text-3);
}
.viz-info b { color: var(--text); font-variant-numeric: tabular-nums; }

.viz-tabs { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.viz-tab {
  padding: 6px 12px; border-radius: 99px;
  background: var(--surface); border: 1px solid var(--line);
  font-size: 12.5px; color: var(--text-2);
  transition: all .13s;
}
.viz-tab:hover { background: var(--surface-3); }
.viz-tab.activa { background: var(--felt-500); border-color: var(--mint); color: #fff; font-weight: 600; }

.cubos rect { animation: aparecerCubo .4s var(--ease) backwards; }
@keyframes aparecerCubo { from { opacity: 0; transform: scale(.8); transform-origin: center; } }
.cantor-fila, .vitali-fila { animation: deslizar .4s var(--ease) backwards; }
@keyframes deslizar { from { opacity: 0; transform: translateX(-14px); } }

/* ---------------------------------------------------------- ejercicios enlazados */

.pg-ejercicios { margin-top: 40px; }
.ex-lista { display: grid; gap: 7px; }
.ex-mini {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--line-soft);
  text-decoration: none; color: var(--text-2);
  font-size: 14px;
  transition: all .14s;
}
.ex-mini:hover {
  text-decoration: none; color: var(--text);
  border-color: var(--line); background: var(--surface-2);
  transform: translateX(3px);
}
.ex-mini-n {
  flex: 0 0 28px; height: 28px;
  display: grid; place-content: center;
  border-radius: 8px;
  background: var(--surface-3);
  font-size: 12.5px; font-weight: 700;
}
.ex-mini-t { flex: 1; }
.ex-mini-d { font-size: 11px; letter-spacing: -1px; }
.ex-mini.estado-resuelto .ex-mini-n { background: rgba(62,224,165,.2); color: var(--mint); }
.ex-mini.estado-intentado .ex-mini-n { background: rgba(255,154,60,.2); color: #ff9a3c; }

/* ---------------------------------------------------------- pie de sección */

.pg-fin {
  margin-top: 60px; padding-top: 30px;
  border-top: 1px solid var(--line);
  display: grid; gap: 22px; justify-items: center;
}
.pg-nav {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; width: 100%; flex-wrap: wrap;
}
.pg-nav .btn { font-size: 13px; }

.volver {
  display: inline-block; margin-bottom: 18px;
  font-size: 13.5px; color: var(--text-3); text-decoration: none;
}
.volver:hover { color: var(--text); text-decoration: none; }

.xref {
  color: var(--mint); text-decoration: none;
  border-bottom: 1px dotted rgba(62,224,165,.45);
}
.xref:hover { text-decoration: none; border-bottom-style: solid; }

/* ---------------------------------------------------------- ejercicios: lista */

.ej-resumen {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  margin-bottom: 22px;
}
.panel-cab {
  display: flex; justify-content: space-between; align-items: baseline;
  font-size: 14px; margin-bottom: 8px;
}
.panel-cab b { color: var(--gold); font-variant-numeric: tabular-nums; }
.panel-barra {
  height: 7px; border-radius: 99px;
  background: var(--surface-3); overflow: hidden;
}
.panel-barra.grande { height: 10px; }
.panel-barra i {
  display: block; height: 100%; border-radius: 99px;
  background: linear-gradient(90deg, var(--mint), var(--gold));
  transition: width .6s var(--ease);
}

.ej-filtros { display: flex; gap: 6px; margin: 22px 0 10px; flex-wrap: wrap; }
.filtro {
  padding: 6px 14px; border-radius: 99px;
  background: var(--surface); border: 1px solid var(--line);
  font-size: 13px; color: var(--text-2);
  transition: all .13s;
}
.filtro:hover { background: var(--surface-2); }
.filtro.activo { background: var(--gold); color: #241a02; border-color: var(--gold); font-weight: 650; }

.ej-lista-grande { display: grid; gap: 6px; margin-bottom: 30px; }
.ej-fila {
  display: flex; align-items: center; gap: 14px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--line-soft);
  text-decoration: none; color: var(--text-2);
  transition: all .14s;
}
.ej-fila:hover {
  text-decoration: none; background: var(--surface-2);
  border-color: var(--line); transform: translateX(3px);
}
.ej-n {
  flex: 0 0 32px; height: 32px;
  display: grid; place-content: center;
  border-radius: 9px; background: var(--surface-3);
  font-weight: 700; font-size: 13px;
}
.ej-cuerpo { flex: 1; min-width: 0; display: grid; gap: 4px; }
.ej-titulo { color: var(--text); font-size: 14.5px; font-weight: 550; }
.ej-temas { display: flex; gap: 5px; flex-wrap: wrap; }
.chip-tema {
  font-size: 10.5px; padding: 1px 7px; border-radius: 99px;
  background: var(--surface-3); color: var(--text-3);
  white-space: nowrap;
}
.ej-dif { font-size: 11px; letter-spacing: -1px; white-space: nowrap; }
.ej-estado { font-size: 15px; flex: 0 0 20px; text-align: center; }
.ej-fila.estado-resuelto .ej-n { background: rgba(62,224,165,.2); color: var(--mint); }
.ej-fila.estado-intentado .ej-n { background: rgba(255,154,60,.2); color: #ff9a3c; }

/* ---------------------------------------------------------- ejercicio: detalle */

.ej-cab { margin-bottom: 24px; }
.ej-cab-n {
  font-size: 11px; font-weight: 800; letter-spacing: .13em;
  text-transform: uppercase; color: var(--sec-color);
  margin-bottom: 6px;
}
.ej-cab h1 { font-family: var(--font-display); font-size: 30px; margin: 0 0 12px; line-height: 1.2; }
.ej-cab-meta { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.ej-dif-grande { font-size: 13px; font-weight: 650; }

.ej-enunciado {
  padding: 20px 22px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--sec-color);
  font-size: 16px;
  margin-bottom: 18px;
}
.ej-enunciado p:last-child { margin-bottom: 0; }

.ej-refs { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; margin-bottom: 22px; font-size: 12px; }

.ej-ayudas { display: grid; gap: 12px; margin-bottom: 28px; }
.ayuda {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  overflow: hidden;
}
.ayuda-cab {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 13px 16px;
  font-size: 14px; font-weight: 600;
}
.ayuda-cab .btn { padding: 6px 14px; font-size: 12.5px; }
.ayuda-cuerpo {
  padding: 0 18px 16px;
  border-top: 1px solid var(--line-soft);
  padding-top: 14px;
  color: var(--text-2);
  font-size: 14.5px;
}
.ayuda-cuerpo p:last-child { margin-bottom: 0; }
.aparece { animation: aparecer .35s var(--ease); }
@keyframes aparecer { from { opacity: 0; transform: translateY(-6px); } }

.ej-acciones { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 26px; }
.btn.activo { border-color: #ff9a3c; color: #ff9a3c; }
.ej-nav {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 20px; border-top: 1px solid var(--line-soft);
  font-size: 13px;
}

/* ---------------------------------------------------------- mapa */

.mapa-leyenda {
  display: flex; flex-wrap: wrap; gap: 6px 16px;
  margin-bottom: 16px; font-size: 12.5px; color: var(--text-2);
}
.leg { display: inline-flex; align-items: center; gap: 6px; }
.leg i { width: 10px; height: 10px; border-radius: 3px; display: inline-block; }

.mapa-scroll {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 10px;
}
.mapa { display: block; margin: 0 auto; }
.mapa .arista { fill: none; stroke: var(--line); stroke-width: 1.4; transition: stroke .2s, opacity .2s; }
.mapa .nodo { cursor: pointer; outline: none; transition: opacity .2s; }
.mapa .nodo rect { transition: filter .2s; }
.mapa .nodo:hover rect:first-child, .mapa .nodo:focus rect:first-child { filter: brightness(1.5); }
.mapa .nodo-tag { font-size: 10px; font-weight: 800; letter-spacing: .04em; }
.mapa .nodo-nombre { font-size: 10.5px; fill: var(--text-2); }
.mapa.aislando .nodo { opacity: .2; }
.mapa.aislando .arista { opacity: .08; }
.mapa.aislando .nodo.on { opacity: 1; }
.mapa.aislando .arista.on { opacity: 1; stroke: var(--gold); stroke-width: 2.2; }

.mapa-detalle {
  margin-top: 18px; padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  min-height: 90px;
}
.det-cab { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 12px; }
.det-cab .btn { margin-left: auto; padding: 5px 12px; font-size: 12.5px; }
.det-cuerpo { font-size: 15px; }
.det-idea { margin-top: 10px; font-size: 14px; color: var(--text-2); }

/* ---------------------------------------------------------- responsive */

@media (max-width: 720px) {
  .pagina { padding: 26px 18px 120px; }
  .pg-hero { gap: 14px; }
  .pg-hero-ico { font-size: 34px; }
  .card-idea, .card-trampa, .card-intuicion, .card-demo { margin-left: 14px; margin-right: 14px; }
  .card-cab, .card-cuerpo { padding-left: 14px; padding-right: 14px; }
  .demo-pasos { padding-left: 30px; }
}

/* ============================================================
   PROGRESO (portada) — lectura del capítulo + práctica
   ============================================================ */

.prog-tarjetas {
  display: grid; gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(330px, 1fr));
  margin-bottom: 30px;
}
.prog-tarjeta {
  display: flex; flex-direction: column; gap: 14px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}
.prog-tarjeta-cab { display: flex; align-items: center; gap: 14px; }
.prog-tarjeta-cab h2 {
  font-family: var(--font-display);
  font-size: 18px; margin: 0 0 3px; line-height: 1.2;
}
.prog-tarjeta-cab p { margin: 0; font-size: 12.5px; }

.prog-lista { display: grid; gap: 4px; }
.prog-fila {
  display: flex; align-items: center; gap: 11px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  text-decoration: none; color: var(--text-2);
  transition: background .13s, border-color .13s;
}
.prog-fila:hover {
  text-decoration: none;
  background: var(--surface-2);
  border-color: var(--line);
}
.prog-fila.ok { border-left: 3px solid var(--sc, var(--mint)); }
.prog-ico { font-size: 16px; flex: 0 0 22px; text-align: center; }
.prog-cuerpo { flex: 1; min-width: 0; display: grid; gap: 2px; }
.prog-titulo { color: var(--text); font-size: 13.5px; font-weight: 550; }
.prog-sub {
  font-size: 11.5px; color: var(--text-3); line-height: 1.4;
  display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical;
  overflow: hidden;
}
.prog-marca { font-size: 14px; flex: 0 0 18px; text-align: center; }

.prog-barras { display: grid; gap: 13px; }
.prog-linea-cab {
  display: flex; justify-content: space-between; align-items: baseline;
  font-size: 12.5px; color: var(--text-2); margin-bottom: 5px;
}
.prog-linea-cab b { color: var(--gold); font-variant-numeric: tabular-nums; }

/* Barra con dos capas: lo resuelto encima de lo simplemente intentado */
.panel-barra.doble { position: relative; }
.panel-barra.doble i { position: absolute; left: 0; top: 0; height: 100%; }
.panel-barra.doble i.intento {
  background: var(--surface-3);
  box-shadow: inset 0 0 0 1px rgba(242,193,78,.25);
  z-index: 1;
}
.panel-barra.doble i.hecho { z-index: 2; }

.prog-nota { font-size: 12px; line-height: 1.55; margin: 0; }
.prog-remate {
  text-align: center; padding: 10px;
  font-size: 13px; color: var(--mint);
  background: rgba(62,224,165,.08);
  border-radius: var(--radius-sm);
}

.btn.ancho {
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  width: 100%; margin-top: auto;
}
.btn-sub { font-size: 11px; font-weight: 500; opacity: .75; }

.prog-atajos {
  display: grid; gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* ============================================================
   ESCALERA DE MINI-EJERCICIOS
   ============================================================ */

.escalera {
  margin: 26px 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--sec-color, var(--mint));
  border-radius: var(--radius);
  background: var(--surface);
}
.escalera-cab {
  display: flex; align-items: flex-start; gap: 14px;
  margin-bottom: 10px;
}
.escalera-cab h2 {
  font-family: var(--font-display);
  font-size: 17px; margin: 0 0 4px; line-height: 1.25;
}
.escalera-cab p { margin: 0; font-size: 12.5px; line-height: 1.5; }
.escalera-cuenta {
  font-size: 13px; color: var(--text-3);
  white-space: nowrap; font-variant-numeric: tabular-nums;
}
.escalera-cuenta b { color: var(--gold); font-size: 19px; }

.mini-lista-caja { margin-top: 16px; }
.escalera-montaje { margin-bottom: 0; }
.mini-lista { list-style: none; margin: 12px 0 0; padding: 0; display: grid; gap: 10px; }
.mini {
  padding: 13px 15px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  background: var(--bg);
  transition: border-color .15s, opacity .15s;
}
.mini.hecho { border-color: rgba(62,224,165,.35); }
.mini.hecho .mini-n { background: rgba(62,224,165,.2); color: var(--mint); }

.mini-cab { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.mini-n {
  flex: 0 0 24px; height: 24px; line-height: 24px; text-align: center;
  border-radius: 7px; background: var(--surface-3); color: var(--text-3);
  font-size: 12px; font-weight: 800; font-variant-numeric: tabular-nums;
}
.mini-titulo { flex: 1; font-size: 14px; font-weight: 600; color: var(--text); }
.mini-check {
  flex: 0 0 auto; font-size: 15px; line-height: 1;
  background: none; border: none; cursor: pointer;
  padding: 3px 5px; border-radius: 6px; color: var(--text-3);
  transition: background .13s;
}
.mini-check:hover { background: var(--surface-2); }

.mini-q { font-size: 14px; line-height: 1.65; margin-bottom: 10px; }
.mini-q p:last-child { margin-bottom: 0; }

.btn.peq { padding: 5px 12px; font-size: 12px; }

.mini-sol {
  margin-top: 11px; padding: 12px 14px;
  border-left: 2px solid var(--gold-deep);
  background: var(--surface);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 13.5px; line-height: 1.65;
}
.mini-sol p:last-child, .mini-sol ul:last-child, .mini-sol ol:last-child { margin-bottom: 0; }
.mini-sol table { font-size: 12.5px; }

/* Contador de escalones en la lista de ejercicios */
.ej-minis {
  font-size: 10.5px; font-weight: 700; white-space: nowrap;
  padding: 2px 7px; border-radius: 99px;
  background: var(--surface-3); color: var(--text-3);
  font-variant-numeric: tabular-nums;
}
.ej-minis.full { background: rgba(62,224,165,.16); color: var(--mint); }

.ayuda-bloqueo { margin: 0; padding: 0 16px 14px; font-size: 12.5px; }

@media (max-width: 720px) {
  .prog-tarjetas, .prog-atajos { grid-template-columns: 1fr; }
  .escalera { padding: 14px; }
  .escalera-cab { flex-direction: column; gap: 8px; }
}

/* Botón de desplegar la escalera (nace plegada) */
.escalera-toggle {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  width: 100%; margin-top: 14px;
  font-size: 13px;
}
.escalera-flecha { font-size: 11px; transition: transform .18s var(--ease); }
.escalera:not(.plegada) .escalera-flecha { transform: rotate(180deg); }
.escalera:not(.plegada) .mini-lista-caja { animation: aparecer .3s var(--ease); }

/* ============================================================
   RECETARIO DE TRUCOS
   ============================================================ */

.tr-barra {
  display: flex; align-items: center; justify-content: space-between;
  gap: 14px; flex-wrap: wrap;
  padding: 14px 18px; margin-bottom: 6px;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--surface);
}
.tr-cuenta { font-size: 13px; color: var(--text-3); }
.tr-cuenta b { color: var(--gold); font-variant-numeric: tabular-nums; }

.truco-lista { display: grid; gap: 12px; margin-top: 14px; }

.truco {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--tc, var(--mint));
  border-radius: var(--radius);
  background: var(--surface);
}
.truco-cab { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.truco-fam { font-size: 17px; }
.truco-cab h3 {
  flex: 1; margin: 0; min-width: 0;
  font-family: var(--font-display); font-size: 17.5px; font-weight: 700;
  line-height: 1.25;
}
.truco-estado {
  font-size: 10.5px; font-weight: 700; white-space: nowrap;
  padding: 2px 8px; border-radius: 99px;
  background: var(--surface-3); color: var(--text-3);
}
.truco-estado.nueva  { background: rgba(62,224,165,.15); color: var(--mint); }
.truco-estado.vencida{ background: rgba(242,193,78,.18); color: var(--gold); }
.truco-estado.madura { background: rgba(76,201,240,.15); color: var(--blue); }

.truco-cuando { font-size: 14.5px; line-height: 1.65; margin-bottom: 12px; }
.truco-cuando p:last-child { margin-bottom: 0; }
.truco-etq {
  display: block; margin-bottom: 4px;
  font-size: 10px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase;
  color: var(--tc, var(--mint));
}

.truco-cuerpo { margin-top: 13px; }
.truco-pasos { margin: 0; padding-left: 22px; }
.truco-pasos li { margin-bottom: 9px; font-size: 14px; line-height: 1.65; }
.truco-pasos li::marker { color: var(--tc, var(--gold)); font-weight: 700; }
.truco-pasos li:last-child { margin-bottom: 0; }

.truco-ojo {
  margin-top: 13px; padding: 12px 14px;
  border-radius: var(--radius-sm);
  background: rgba(255,77,109,.08);
  border-left: 2px solid var(--red);
  font-size: 13.5px; line-height: 1.6;
}
.truco-ojo > span {
  display: block; margin-bottom: 3px;
  font-size: 10px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase;
  color: var(--red);
}
.truco-ojo p:last-child { margin-bottom: 0; }

.truco-dondes { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; margin-top: 13px; font-size: 12px; }
.truco-donde {
  font-size: 11px; font-weight: 700;
  padding: 2px 8px; border-radius: 99px;
  background: var(--surface-3); color: var(--text-2);
  text-decoration: none;
}
.truco-donde:hover { background: var(--gold); color: #241a02; text-decoration: none; }

/* ---------------- modo tarjeta ---------------- */

.trucos-practica { max-width: 720px; }
.tp-barra { display: flex; align-items: center; gap: 14px; margin-bottom: 26px; }
.tp-salir {
  width: 32px; height: 32px; border-radius: 9px;
  color: var(--text-3); font-size: 15px;
}
.tp-salir:hover { background: var(--surface-2); color: var(--text); }
.tp-progreso { flex: 1; height: 6px; border-radius: 99px; background: var(--surface-3); overflow: hidden; }
.tp-progreso i {
  display: block; height: 100%; border-radius: 99px;
  background: linear-gradient(90deg, var(--mint), var(--gold));
  transition: width .4s var(--ease);
}
.tp-contador { font-size: 13px; color: var(--text-3); font-variant-numeric: tabular-nums; }
.tp-contador b { color: var(--text); }

.tp-carta {
  padding: 26px;
  border: 1px solid var(--line);
  border-top: 3px solid var(--tc, var(--mint));
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-1);
}
.tp-carta.entra { animation: repartirCarta .42s var(--ease); }
.tp-fam { font-size: 12px; color: var(--tc, var(--mint)); margin-bottom: 14px; }
.tp-cuando { font-size: 17px; line-height: 1.7; }
.tp-cuando p:last-child { margin-bottom: 0; }
.tp-instruccion { font-size: 12.5px; color: var(--text-3); margin: 16px 0 18px; }
.tp-carta > .btn { width: 100%; }

.tp-detras { margin: 20px 0; }
.tp-detras h3 {
  font-family: var(--font-display); font-size: 18px; margin: 0 0 12px;
}

.tp-final { text-align: center; padding: 40px 20px; }
.tp-final h2 { font-family: var(--font-display); font-size: 34px; margin: 8px 0; }
.tp-final .final-ico { font-size: 46px; }
.tp-final-btns { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-top: 20px; }


/* ============================================================
   Pruebas pasadas (views/pruebas.js)
   ============================================================ */

.prueba-lista { display: grid; gap: 10px; margin: 18px 0 34px; }

.prueba-fila {
  display: flex; align-items: center; gap: 14px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text); text-decoration: none;
  transition: border-color .15s, transform .15s, background .15s;
}
.prueba-fila:hover {
  text-decoration: none;
  border-color: var(--gold-deep);
  background: var(--surface-2);
  transform: translateY(-1px);
}
.prueba-fila.completa { border-color: rgba(62,224,165,.4); }

.prueba-anio {
  font-family: var(--font-display); font-size: 26px; font-weight: 700;
  color: var(--gold); flex: 0 0 auto; line-height: 1;
}
.prueba-cuerpo { flex: 1; min-width: 0; display: grid; gap: 5px; }
.prueba-titulo { font-weight: 650; }
.prueba-meta { font-size: 12.5px; color: var(--text-3); }
.prueba-cuenta {
  font-variant-numeric: tabular-nums; font-weight: 700; font-size: 13px;
  color: var(--text-2); flex: 0 0 auto;
}
.prueba-cuenta.full { color: var(--mint); }

/* --------------------------------------------- cómo resuelve el profesor */

.estilo-caja {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 18px 20px 8px;
}
.estilo-lista { display: grid; gap: 6px; margin: 14px 0 12px; }
.estilo-item {
  border-bottom: 1px solid var(--line-soft);
  padding-bottom: 6px;
}
.estilo-item:last-child { border-bottom: none; }
.estilo-item > summary {
  cursor: pointer; padding: 8px 0;
  font-weight: 600; font-size: 14.5px;
  list-style: none;
}
.estilo-item > summary::-webkit-details-marker { display: none; }
.estilo-item > summary::before {
  content: "▸"; color: var(--text-3);
  display: inline-block; width: 18px;
  transition: transform .18s var(--ease);
}
.estilo-item[open] > summary::before { transform: rotate(90deg); }
.estilo-cuerpo { padding: 0 0 10px 18px; font-size: 14.5px; color: var(--text-2); }
.estilo-donde { margin-top: 8px; font-size: 12px; display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.estilo-donde code {
  background: var(--surface-2); border: 1px solid var(--line);
  border-radius: 5px; padding: 1px 6px; font-size: 11.5px; color: var(--gold-soft);
}

/* --------------------------------------------- detalle de una prueba */

.pb-hero { padding: 6px 0 20px; border-bottom: 1px solid var(--line-soft); margin-bottom: 20px; }
.pb-hero-etq {
  font-size: 11px; font-weight: 800; letter-spacing: .13em;
  text-transform: uppercase; color: var(--gold); margin-bottom: 6px;
}
.pb-hero h1 { margin: 0 0 10px; font-family: var(--font-display); font-size: 27px; }
.pb-hero-meta {
  display: flex; flex-wrap: wrap; gap: 6px 18px;
  font-size: 13px; color: var(--text-3); margin-bottom: 14px;
}
.pb-progreso { font-size: 12.5px; color: var(--text-3); margin-top: 6px; }

.pb-crono {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 12px 16px; margin-bottom: 26px;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--surface);
}
.pb-crono.corriendo { border-color: var(--gold-deep); box-shadow: var(--glow-gold); }
.crono-cara { display: grid; gap: 2px; }
.crono-tiempo {
  font-family: var(--font-mono); font-size: 26px; font-weight: 700;
  font-variant-numeric: tabular-nums; line-height: 1;
}
.pb-crono.corriendo .crono-tiempo { color: var(--gold); }
.crono-etq { font-size: 11.5px; color: var(--text-3); }

.pb-problema { margin-bottom: 42px; }
.pb-cab { margin-bottom: 10px; }
.pb-n { font-size: 11px; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; color: var(--text-3); }
.pb-pts-grande { color: var(--gold); margin-left: 6px; }
.pb-cab h2 { margin: 4px 0 0; font-size: 19px; }
.pb-preambulo { margin: 12px 0 18px; }

.pb-unidad {
  border-left: 2px solid var(--line);
  padding: 4px 0 4px 16px;
  margin: 16px 0;
  transition: border-color .2s;
}
.pb-unidad.hecha { border-left-color: var(--mint); }
.pb-inciso-cab { display: flex; align-items: baseline; gap: 10px; margin-bottom: 6px; }
.pb-letra { font-weight: 700; color: var(--gold); }
.pb-pts { font-size: 11.5px; color: var(--text-3); }

.pb-acciones { display: flex; flex-wrap: wrap; gap: 10px; margin: 14px 0; }

.pb-sol {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
  padding: 14px 18px;
  margin-top: 12px;
}
.pb-sol-bloque + .pb-sol-bloque { margin-top: 20px; padding-top: 18px; border-top: 1px dashed var(--line); }
.pb-sol-etq {
  font-size: 11px; font-weight: 800; letter-spacing: .12em;
  text-transform: uppercase; color: var(--gold); margin-bottom: 10px;
}
.pb-veredicto {
  border-radius: 99px; padding: 1px 9px; margin-left: 6px;
  font-size: 10.5px; letter-spacing: .06em;
}
.pb-veredicto.cierto { background: rgba(62,224,165,.16); color: var(--mint); }
.pb-veredicto.falso  { background: rgba(255,77,109,.16); color: var(--red); }
.pb-nota { margin-top: 14px; }

@media (max-width: 720px) {
  .prueba-fila { gap: 10px; padding: 12px; }
  .prueba-anio { font-size: 21px; }
  .pb-crono { flex-direction: column; align-items: stretch; }
}