/* Flujo UX (agente UX, peticiones K y L): primera visita "¿Qué examen quieres
   preparar?", "Mis exámenes" y plan de estudio. Solo clases propias (ux-*,
   onb-*, exam-pick*, plan-*, goal*, choice-chip…) y los tokens de styles.css. */

.ux-narrow { max-width: 820px; }

/* ---------- primera visita ---------- */
body.ux-onboarding .sidebar,
body.ux-onboarding .tabbar,
body.ux-onboarding .mobile-top,
body.ux-onboarding .site-foot { display: none; }
body.ux-onboarding .shell { grid-template-columns: 1fr; }
.onb { max-width: 980px; margin: 0 auto; padding-bottom: 120px; }
.onb-top { display: flex; align-items: center; gap: var(--sp-4); justify-content: space-between; margin-bottom: var(--sp-5); }
.onb-brand { display: inline-flex; align-items: center; gap: var(--sp-2); font: 800 1.1rem var(--font-display); color: var(--ink); }
.onb-steps { display: flex; gap: 6px; flex: 1; max-width: 200px; }
.onb-steps i { flex: 1; height: 10px; border-radius: 99px; background: var(--surface-3); }
.onb-steps i.on { background: var(--green-bright); }
.onb-hello { display: flex; align-items: center; gap: var(--sp-3); margin-bottom: var(--sp-2); }
.onb-hello .bubble { margin: 0; }
.onb-title { font-size: clamp(1.6rem, 4.5vw, 2.4rem); margin: var(--sp-3) 0 var(--sp-1); }
.onb-sub { margin: 0 0 var(--sp-5); }
.onb-back { display: inline-flex; align-items: center; gap: 4px; }
.onb-bar {
  position: fixed; inset: auto 0 0 0; z-index: 20; display: flex; justify-content: center;
  padding: var(--sp-3) 16px calc(var(--sp-3) + env(safe-area-inset-bottom));
  background: var(--surface); border-top: var(--bw) solid var(--border);
}
.onb-bar .btn { min-width: min(100%, 360px); }
/* Bienvenida v2 (2026-10-12): una pregunta por pantalla, barra de progreso, Atrás. */
.onb.ux-narrow { max-width: 640px; }
.onb-progress { flex: 1; max-width: 260px; height: 14px; border-radius: 99px; background: var(--surface-3); overflow: hidden; border: var(--bw) solid var(--border); }
.onb-progress i { display: block; height: 100%; border-radius: 99px; background: var(--green-bright); transition: width .35s ease; }
.onb-login { white-space: nowrap; }
.onb-opts { display: grid; gap: var(--sp-3); margin: var(--sp-4) 0 var(--sp-5); }
.onb-opt {
  display: flex; align-items: center; gap: var(--sp-4); width: 100%; min-height: 84px; padding: var(--sp-4) var(--sp-4); text-align: left;
  font: inherit; color: var(--ink); cursor: pointer; border: var(--bw) solid var(--border); border-radius: var(--r-lg);
  background: var(--surface); box-shadow: var(--edge);
}
.onb-opt > svg:first-child { flex: none; color: var(--blue); }
.onb-opt > svg:last-child { flex: none; color: var(--ink-2); margin-left: auto; }
.onb-opt > span { display: grid; gap: 2px; min-width: 0; }
.onb-opt strong { font: 800 var(--t-lg) var(--font-display); }
.onb-opt small { color: var(--ink-2); font-size: var(--t-sm); }
.onb-opt:hover, .onb-opt:focus-visible { border-color: var(--blue-bright); outline: none; }
.onb-opt:active { transform: translateY(var(--lip)); box-shadow: none; }
.onb-opt[aria-pressed="true"] { border-color: var(--green-bright); background: color-mix(in srgb, var(--green-bright) 12%, var(--surface)); box-shadow: 0 var(--lip) 0 var(--green-bright); }
.onb-opt[aria-pressed="true"] > svg:first-child { color: var(--green-dark); }
.onb-skip-line, .onb-add-line { margin: var(--sp-3) 0 0; }
.onb-code { display: grid; gap: var(--sp-3); justify-items: start; margin: var(--sp-4) 0 var(--sp-5); }
.onb-code-input { width: 100%; max-width: 320px; font-size: 1.6rem; padding: 14px 16px; text-align: center; letter-spacing: .3em; border-width: var(--bw); border-radius: var(--r-md); }
.onb-code .form-error { margin: 0; }
.onb-h2 { font-size: var(--t-xl); margin: var(--sp-5) 0 var(--sp-1); }
.onb-lang-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: var(--sp-3); margin: var(--sp-4) 0 0; }
.onb-lang-card {
  display: grid; justify-items: center; gap: 6px; padding: var(--sp-4) var(--sp-3); font: inherit; color: var(--ink); text-align: center; cursor: pointer;
  border: var(--bw) solid var(--border); border-radius: var(--r-lg); background: var(--surface); box-shadow: var(--edge);
}
.onb-lang-card strong { font: 800 var(--t-lg) var(--font-display); }
.onb-lang-card small { color: var(--ink-2); font-size: var(--t-xs); }
.onb-lang-card:hover, .onb-lang-card:focus-visible { border-color: var(--blue-bright); outline: none; }
.onb-lang-card:active { transform: translateY(var(--lip)); box-shadow: none; }
.onb-lang-card[aria-pressed="true"] { border-color: var(--course); box-shadow: 0 var(--lip) 0 var(--course); background: color-mix(in srgb, var(--course) 10%, var(--surface)); }
.onb-lang-card.soon { cursor: default; opacity: .6; box-shadow: none; }
.onb-from { margin-top: var(--sp-2); }
.choice-chip.is-soon { opacity: .55; cursor: default; box-shadow: none; }
.onb-soon { margin-top: var(--sp-3); }
.onb-soon > summary { cursor: pointer; color: var(--ink-2); font-size: var(--t-sm); display: flex; align-items: center; gap: 6px; }
.onb-soon .chip-row { margin-top: var(--sp-2); }
.onb-pairs { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin: var(--sp-2) 0 var(--sp-3); }
.onb-pairs .choice-chip.is-cur { border-color: var(--green-bright); color: var(--green-dark); background: color-mix(in srgb, var(--green-bright) 12%, var(--surface)); box-shadow: 0 3px 0 var(--green-bright); }
.onb-pair-x { display: grid; place-items: center; width: 28px; height: 28px; margin-right: 6px; padding: 0; border: 0; border-radius: 50%; background: var(--surface-2); color: var(--ink-2); cursor: pointer; }
.onb-plan-langs { list-style: none; margin: 0 0 var(--sp-4); padding: 0; display: grid; gap: 6px; }
.onb-plan-langs li { display: flex; align-items: center; gap: 8px; padding: 10px 14px; border: var(--bw) solid var(--border); border-radius: var(--r-md); background: var(--surface); font-weight: 700; }
.onb-plan-langs svg { color: var(--blue); flex: none; }
.onb-summary { list-style: none; margin: var(--sp-4) 0 0; padding: 0; display: grid; gap: var(--sp-2); }
.onb-sum-row { display: flex; align-items: center; gap: var(--sp-3); padding: 12px 14px; border: var(--bw) solid var(--border); border-radius: var(--r-md); background: var(--surface); }
.onb-sum-row > svg { flex: none; color: var(--blue); }
.onb-sum-row > span { flex: 1; min-width: 0; font-weight: 700; }
.onb-sum-row .link-btn { flex: none; width: auto; min-width: 0; }
.onb-pet { line-height: 0; }
.onb-bar { gap: var(--sp-3); }
.onb-bar .btn-ghost { min-width: 0; }
@media (max-width: 600px) {
  .onb-progress { max-width: none; }
  .onb-bar .btn-brand { flex: 1; }
  .onb-lang-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .onb-opt { min-height: 76px; }
}

/* ---------- selector de exámenes ---------- */
.exam-search {
  display: flex; align-items: center; gap: var(--sp-2); padding: 0 var(--sp-4); margin-bottom: var(--sp-5);
  border: var(--bw) solid var(--border); border-radius: var(--r-md); background: var(--surface-2); color: var(--ink-2);
}
.exam-search:focus-within { border-color: var(--blue); background: var(--surface); }
.exam-search input { flex: 1; min-width: 0; border: 0; background: transparent; padding: 14px 0; font: inherit; font-size: 1rem; color: var(--ink); outline: none; box-shadow: none; }
.exam-group { margin-bottom: var(--sp-5); }
.exam-group[hidden], .exam-pick[hidden] { display: none; }
.exam-group-title { font-size: var(--t-sm); text-transform: uppercase; letter-spacing: .08em; color: var(--ink-2); margin: 0 0 var(--sp-3); }
.exam-pick-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: var(--sp-3); }
.exam-pick {
  position: relative; display: flex; align-items: center; gap: var(--sp-3); width: 100%; min-height: 84px; text-align: left;
  padding: var(--sp-3) var(--sp-4); font: inherit; color: var(--ink); cursor: pointer;
  background: var(--surface); border: var(--bw) solid var(--border); border-radius: var(--r-lg); box-shadow: var(--edge);
  transition: transform .08s, border-color .12s, background .12s;
}
div.exam-pick { cursor: default; }
button.exam-pick:hover { border-color: color-mix(in srgb, var(--accent) 45%, var(--border)); }
button.exam-pick:active { transform: translateY(2px); box-shadow: 0 2px 0 var(--border); }
.exam-pick[aria-pressed="true"] { border-color: var(--blue); background: var(--blue-soft); box-shadow: 0 var(--lip) 0 var(--blue); }
.exam-pick-text { display: flex; flex-direction: column; min-width: 0; flex: 1; }
.exam-pick-text strong { font: 800 1.1rem var(--font-display); }
.exam-pick-text small { color: var(--ink-2); font-size: var(--t-sm); line-height: 1.3; overflow: hidden; text-overflow: ellipsis; }
.exam-pick-meta { font-size: var(--t-xs) !important; margin-top: 2px; }
.exam-pick-tick {
  flex: none; width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center;
  border: var(--bw) solid var(--border-strong); color: transparent; background: var(--surface);
}
.exam-pick[aria-pressed="true"] .exam-pick-tick { background: var(--blue); border-color: var(--blue); color: #fff; }
.exam-pick-add { flex: none; width: 48px; min-width: 48px; padding: 0; font-size: 1.6rem; line-height: 1; }
.exam-soon { color: var(--ink-2); font-size: var(--t-sm); margin-top: var(--sp-2); }
.exam-search-empty { text-align: center; padding: var(--sp-5) 0; }

/* ---------- Mis exámenes ---------- */
.my-exam-tile .tile-top { color: inherit; text-decoration: none; }
.my-exam-tile .tile-actions { align-items: center; }
.grid-3.my-exams > * { min-width: 0; }
.my-exam-next { max-width: 100%; white-space: normal; text-align: left; height: auto; }
.add-exam-tile {
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: var(--sp-2); min-height: 150px;
  border-style: dashed !important; color: var(--ink-2); font-weight: 700; text-decoration: none; background: var(--surface);
}
.add-exam-tile::before { display: none; }
.add-exam-plus {
  width: 48px; height: 48px; border-radius: 50%; display: grid; place-items: center;
  font: 800 1.8rem/1 var(--font-display); color: var(--blue); background: var(--blue-soft);
}
.add-exam-tile:hover { color: var(--blue); }

/* ---------- plan de estudio (Inicio) ---------- */
.plan-head { display: flex; align-items: center; justify-content: space-between; gap: var(--sp-3); }
.plan-head h2 { margin: 0; font-size: var(--t-xl); white-space: nowrap; }
@media (max-width: 600px) { .plan-head h2 { font-size: var(--t-lg); } }
.plan-edit { display: inline-flex; align-items: center; gap: 6px; width: auto; flex: none; white-space: nowrap; text-decoration: none; color: var(--blue); font: 800 var(--t-xs) var(--font-display); text-transform: uppercase; letter-spacing: .06em; }
.plan-edit:hover { text-decoration: underline; }
@media (max-width: 600px) { .btn-sm { max-width: 100%; white-space: normal; text-align: center; } .plan-edit { white-space: normal; flex: 0 1 auto; text-align: right; } }
.plan-week { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 6px; margin: var(--sp-4) 0; }
.plan-day {
  display: flex; flex-direction: column; align-items: center; gap: 4px; padding: 8px 0 10px; min-width: 0;
  border: var(--bw) solid var(--border); border-radius: var(--r-md); background: var(--surface); color: var(--ink-2);
  font: inherit; font-size: var(--t-xs);
}
button.plan-day { cursor: pointer; box-shadow: 0 3px 0 var(--border); }
button.plan-day:active { transform: translateY(2px); box-shadow: none; }
.plan-day-name { font-weight: 800; text-transform: uppercase; }
.plan-day-mark { height: 22px; display: grid; place-items: center; font-weight: 800; color: var(--ink); }
.plan-day.is-done { background: var(--gold-soft); border-color: var(--gold-bright); }
.plan-day.is-done .plan-day-mark { color: var(--clay); }
.plan-day.is-frozen { background: var(--blue-soft); }
.plan-day.is-frozen .plan-day-mark { color: var(--blue); }
.plan-day.is-missed { opacity: .7; }
.plan-day.is-exam { border-color: var(--danger-bright); }
.plan-day.is-exam .plan-day-mark { color: var(--danger); }
.plan-day.is-today { border-color: var(--green-bright); }
.plan-day.is-selected { border-color: var(--blue); background: var(--blue-soft); color: var(--blue); box-shadow: 0 3px 0 var(--blue); }
.plan-day.is-today.is-selected { border-color: var(--green); background: var(--green-soft); color: var(--green-ink); box-shadow: 0 3px 0 var(--green); }
.plan-day-title { font-weight: 800; margin: 0 0 var(--sp-2); }
.plan-day-title::first-letter { text-transform: uppercase; }
/* Tareas del día = camino tipo Duolingo: nodos redondos con labio 3D unidos por una línea. */
.plan-tasks { list-style: none; margin: 0; padding: 0 !important; display: grid; gap: var(--sp-2); position: relative; }
.plan-path::before { content: ""; position: absolute; left: 31px; top: 28px; bottom: 28px; width: 4px; border-radius: 4px; background: var(--surface-3); }
.plan-task { margin: 0 !important; padding: 0 !important; position: relative; }
.plan-task > a, .plan-task:not(:has(> a)) {
  display: flex; align-items: center; gap: var(--sp-3); padding: 6px var(--sp-2); border-radius: var(--r-md);
  color: var(--ink); text-decoration: none;
}
.plan-task > a:hover { background: var(--surface-2); }
.plan-task-check {
  flex: none; position: relative; width: 48px; height: 46px; border-radius: 50%; display: grid; place-items: center;
  background: var(--surface-3); color: var(--ink-2); box-shadow: 0 4px 0 var(--border-strong);
}
.plan-task.kind-review .plan-task-check { background: var(--clay-bright); color: #fff; box-shadow: 0 4px 0 var(--clay-dark); }
.plan-task.kind-practice .plan-task-check { background: var(--blue-bright); color: #fff; box-shadow: 0 4px 0 var(--blue); }
.plan-task.kind-test .plan-task-check { background: var(--gold-bright); color: #5a3a00; box-shadow: 0 4px 0 var(--gold-dark); }
.plan-task:not(:has(> a)) .plan-task-check { background: var(--surface-3); color: var(--ink-2); box-shadow: 0 4px 0 var(--border-strong); }
.plan-task.is-done .plan-task-check { background: var(--gold-bright); color: #5a3a00; box-shadow: 0 4px 0 var(--gold-dark); }
.plan-task.is-next .plan-task-check { background: var(--green-bright); color: #fff; box-shadow: 0 4px 0 var(--green); outline: 4px solid var(--green-soft); outline-offset: 2px; }
.plan-task.is-next .plan-task-check .ic { fill: currentColor; margin-left: 3px; }
.plan-task > a:active .plan-task-check { transform: translateY(4px); box-shadow: none; }
.plan-task.is-done strong { color: var(--ink-2); }
.plan-task-text { display: flex; flex-direction: column; min-width: 0; flex: 1; }
.plan-task-text strong { font-weight: 800; line-height: 1.3; }
.plan-task-text small { color: var(--ink-2); font-size: var(--t-xs); font-weight: 600; }
.plan-task-go { color: var(--ink-2); flex: none; }
.plan-task.is-next .plan-task-go { color: var(--green); }
.plan-all-done, .plan-exam-day { display: flex; align-items: center; gap: var(--sp-2); font-weight: 700; color: var(--green-ink); margin: 0 0 var(--sp-2); }
.plan-exam-day { color: var(--danger); }
.hero-cta .cta-summary { overflow-wrap: anywhere; }

/* ---------- formulario de objetivos ---------- */
.goals-form { display: grid; gap: var(--sp-4); }
.goal-exam { border: var(--bw) solid var(--border); border-radius: var(--r-lg); padding: var(--sp-4); margin: 0; display: grid; gap: var(--sp-4); min-width: 0; }
.goal-exam legend { font: 800 1.1rem var(--font-display); padding: 0 var(--sp-2); color: var(--accent); }
.goal-field { display: grid; gap: var(--sp-2); }
.goal-field > span { display: inline-flex; align-items: center; gap: 6px; font-weight: 700; }
.goal-field input[type="date"] { max-width: 240px; }
.chip-group-label { margin: var(--sp-1) 0 0; font-size: var(--t-xs); text-transform: uppercase; letter-spacing: .06em; color: var(--ink-2); }
.chip-row { display: flex; flex-wrap: wrap; gap: var(--sp-2); }
.choice-chip {
  display: inline-flex; flex-direction: column; align-items: center; justify-content: center; min-height: 44px; padding: 8px 14px;
  font: inherit; font-size: var(--t-sm); font-weight: 700; color: var(--ink); cursor: pointer;
  background: var(--surface); border: var(--bw) solid var(--border); border-radius: var(--r-md); box-shadow: 0 3px 0 var(--border);
}
.choice-chip:active { transform: translateY(2px); box-shadow: none; }
.choice-chip.big { min-width: 96px; }
.choice-chip small { font-weight: 500; color: var(--ink-2); font-size: var(--t-xs); }
.choice-chip[aria-pressed="true"], .choice-chip[aria-checked="true"] { border-color: var(--blue); background: var(--blue-soft); color: var(--blue); box-shadow: 0 3px 0 var(--blue); }
.goals-actions { display: flex; justify-content: flex-end; align-items: center; gap: var(--sp-3); flex-wrap: wrap; }

@media (max-width: 600px) {
  .onb-top { gap: var(--sp-2); }
  .onb-brand strong { display: none; }
  .exam-pick-grid, .grid-3.my-exams { grid-template-columns: minmax(0, 1fr); }
  .plan-week { gap: 4px; }
  .plan-day { padding: 6px 0 8px; }
  .choice-chip.big { min-width: calc(33.33% - 6px); flex: 1 1 calc(33.33% - 6px); }
  .goals-actions .btn { flex: 1; }
}

/* ---------- flecha ← Volver (agente ux-nav, js/nav-back.js) ---------- */
.nav-back {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px; flex: none;
  min-width: 44px; min-height: 44px; padding: 0 var(--sp-3); border-radius: 999px;
  border: var(--bw) solid var(--border); background: var(--surface); color: var(--ink);
  font: 800 var(--t-sm) var(--font-display); text-decoration: none; box-shadow: var(--edge, none); cursor: pointer;
}
.nav-back:hover { border-color: var(--blue-bright); color: var(--blue); }
.nav-back:focus-visible { outline: 3px solid var(--focus, var(--blue)); outline-offset: 2px; }
.nav-back:active { transform: translateY(1px); }
.nav-back[hidden], .nav-back-row[hidden] { display: none !important; }
.nav-back-m { width: 48px; height: 48px; padding: 0; }
.nav-back-row { padding: var(--sp-4) clamp(16px, 4vw, 48px) 0; }
body.has-nav-back main { padding-top: var(--sp-4); }
body.has-nav-back .mobile-top > .brand { margin-right: auto; }
body.in-session .nav-back, body.in-session .nav-back-row,
body.ux-onboarding .nav-back, body.ux-onboarding .nav-back-row { display: none !important; }
@media (min-width: 861px) { .nav-back-m { display: none !important; } }
@media (max-width: 860px) { .nav-back-row { display: none !important; } body.has-nav-back main { padding-top: var(--sp-4); } }
.nav-back-row > .nav-back { margin-left: max(0px, calc((100% - 1080px) / 2)); }

/* ---------- Repaso (#/repaso): "Hoy te toca repasar N" + lista por examen/idioma ---------- */
.rv-hero .hero-cta small { display: block; margin-top: 2px; }
.rv-row { gap: 10px; }
.rv-row .name small { white-space: normal; }
.rv-actions { display: flex; gap: 6px; flex-wrap: wrap; justify-content: flex-end; align-items: center; }
.rv-how > summary { cursor: pointer; font-weight: 800; display: flex; align-items: center; gap: 8px; }
.rv-how p { margin: 8px 0 0; }
.srs-card .srs-lines { list-style: none; padding: 0; margin: 0 0 12px; display: grid; gap: 8px; }
.srs-card .srs-lines li { display: flex; align-items: flex-start; gap: 8px; }
.srs-card .srs-lines .ic { flex: none; margin-top: 3px; color: var(--accent, var(--blue)); }
@media (max-width: 600px) { .rv-row { flex-wrap: wrap; } .rv-row .rv-actions { width: 100%; justify-content: flex-start; padding-left: 52px; } }