/* Bitcoinpedia Academy — estilos propios (rediseño 2026-09, prototipos/curso.html y leccion.html).
   Se carga después del <style> de index.html, del que toma tokens y piezas comunes:
   .top, .art-hero, .art-grid, .crumbs, .band, .upath, .btn, .sec-list, .pn, .foot… */

.tag { padding: 3px 10px; border-radius: 999px; font-size: 11px; font-weight: 700; letter-spacing: .5px; text-transform: uppercase; white-space: nowrap; }
.tag-free { background: rgba(48,209,88,.13); color: #1f9d45; }
.tag-soon { background: var(--surface-2); color: var(--text-3); border: 1px solid var(--line); }
[data-theme="dark"] .tag-free { color: #4fd97a; }

/* Estado de lección: círculo → verde con ✓ */
.st { display: inline-grid; place-items: center; width: 15px; height: 15px; flex-shrink: 0; border-radius: 50%; border: 1.5px solid var(--text-3); font-size: 9px; line-height: 1; color: #fff; }
.is-done .st { background: var(--green); border-color: var(--green); }
.is-done .st::after { content: '✓'; }

/* Progreso */
.ac-progress-line { height: 4px; border-radius: 2px; background: var(--line); overflow: hidden; }
.ac-progress-line > span { display: block; height: 100%; width: 0; border-radius: 2px; background: var(--orange); transition: width .4s ease; }
.ac-progress-text { font-size: 13px; color: var(--text-3); }
.tl-count { color: var(--green); font-weight: 600; }

/* ═══ CABECERAS OSCURAS (Academy y curso) ═══ */
.c-hero { position: relative; overflow: hidden; color: var(--cream); background: radial-gradient(ellipse 55% 80% at 90% 10%, rgba(212,160,71,.22), transparent 60%), radial-gradient(ellipse 45% 70% at 0% 100%, rgba(247,147,26,.14), transparent 60%), var(--carbon); }
.c-hero-in { display: grid; grid-template-columns: 1.2fr 1fr; gap: 64px; align-items: center; padding-top: 48px; padding-bottom: 80px; }
.c-hero-in > *, .c-grid > * { min-width: 0; }
.c-hero-single { grid-template-columns: minmax(0, 760px); }
.crumbs-dark { color: rgba(250,247,242,.5); margin-bottom: 28px; }
.crumbs-dark span { color: rgba(250,247,242,.8); }
.c-hero h1 { margin-top: 12px; font-family: var(--serif); font-weight: 900; font-size: clamp(38px, 5vw, 60px); line-height: 1.08; letter-spacing: -1.2px; }
.c-hero h1 em { font-style: normal; color: var(--orange); }
.c-lead { margin-top: 18px; max-width: 560px; font-size: 18px; line-height: 1.65; color: rgba(250,247,242,.74); }
.c-facts { margin-top: 26px; display: flex; flex-wrap: wrap; gap: 8px; }
.c-facts span { display: inline-flex; align-items: center; gap: 7px; padding: 7px 13px; border-radius: 999px; background: rgba(250,247,242,.06); border: 1px solid rgba(250,247,242,.1); font-size: 13px; color: var(--cream); }
.c-facts .ic { color: var(--gold); }
.c-cta { margin-top: 32px; display: flex; flex-wrap: wrap; gap: 12px; }
.c-hero-r { padding: 32px; border-radius: 24px; background: rgba(250,247,242,.04); border: 1px solid rgba(250,247,242,.08); }
.c-progress-card { display: flex; align-items: center; gap: 18px; padding-bottom: 26px; margin-bottom: 26px; border-bottom: 1px solid rgba(250,247,242,.08); }
.c-progress-card strong { display: block; font-size: 16px; }
.c-progress-card .ac-progress-text { color: rgba(250,247,242,.6); }
.c-ring { --p: 0; width: 64px; height: 64px; border-radius: 50%; flex-shrink: 0; display: grid; place-items: center; background: conic-gradient(var(--orange) calc(var(--p) * 1%), rgba(250,247,242,.1) 0); }
.c-ring span { width: 50px; height: 50px; border-radius: 50%; display: grid; place-items: center; background: var(--carbon); font-family: var(--serif); font-weight: 900; font-size: 14px; }
.unode.is-done { background: var(--green); border-color: var(--green); color: #fff; box-shadow: none; }

/* /curso/: tarjetas de curso */
.ac-courses { display: grid; gap: 18px; }
.ac-course { display: grid; grid-template-columns: 1.3fr 1fr; gap: 40px; align-items: center; padding: 40px; border-radius: 26px; color: var(--cream); background: radial-gradient(ellipse 60% 80% at 100% 0%, rgba(212,160,71,.2), transparent 60%), var(--carbon); border: 1px solid rgba(212,160,71,.3); box-shadow: 0 24px 60px rgba(11,13,18,.22); transition: transform .35s var(--ease); }
.ac-course:hover { transform: translateY(-3px); }
.ac-course > * { min-width: 0; }
.ac-course h2 { margin-top: 10px; font-family: var(--serif); font-weight: 900; font-size: 32px; }
.ac-course p { margin-top: 12px; font-size: 16px; line-height: 1.65; color: rgba(250,247,242,.74); }
.ac-course .btn { margin-top: 26px; }
.ac-course-r .ac-progress-line { margin-top: 26px; background: rgba(250,247,242,.12); }
.ac-course-r .ac-progress-text { margin-top: 8px; text-align: center; color: rgba(250,247,242,.6); }

/* Método */
.steps { list-style: none; display: grid; grid-template-columns: repeat(6, 1fr); gap: 14px; }
.steps li { position: relative; display: flex; flex-direction: column; gap: 4px; padding: 20px 18px; border-radius: 16px; background: var(--surface); border: 1px solid var(--line); }
.step-ic { width: 42px; height: 42px; margin-bottom: 10px; border-radius: 50%; display: grid; place-items: center; background: rgba(247,147,26,.1); color: var(--orange); }
.step-ic .ic { width: 20px; height: 20px; }
.step-n { position: absolute; top: 16px; right: 16px; font-family: var(--serif); font-weight: 900; font-size: 13px; color: var(--text-3); }
.steps strong { font-family: var(--serif); font-size: 16px; }
.steps li > span:last-child { font-size: 13px; color: var(--text-2); }

/* Temario */
.c-grid { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 56px; align-items: start; }
.timeline { list-style: none; position: relative; }
.timeline::before { content: ''; position: absolute; left: 21px; top: 10px; bottom: 10px; width: 2px; background: linear-gradient(var(--orange), var(--gold) 30%, var(--line) 32%); }
.tl { position: relative; display: flex; gap: 22px; padding-bottom: 18px; }
.tl-n { position: relative; z-index: 1; flex-shrink: 0; width: 44px; height: 44px; border-radius: 50%; display: grid; place-items: center; font-family: var(--serif); font-weight: 900; font-size: 16px; background: var(--orange); color: var(--carbon); box-shadow: 0 0 0 6px var(--bg); }
.tl.is-done .tl-n { background: var(--green); }
.tl-pending .tl-n { background: var(--surface); color: var(--text-3); border: 1.5px dashed var(--line); }
.tl-card { flex: 1; min-width: 0; padding: 20px 22px; border-radius: 16px; background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow); }
.tl-pending .tl-card { box-shadow: none; background: transparent; padding-top: 10px; padding-bottom: 10px; }
.tl-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.tl h3 { font-family: var(--serif); font-size: 19px; }
.tl h3 a:hover { color: var(--orange); }
.tl-pending h3 { font-size: 16px; color: var(--text-2); }
.tl-card p { margin-top: 6px; font-size: 14.5px; color: var(--text-2); line-height: 1.6; }
.tl-meta { margin-top: 8px; font-size: 12.5px; color: var(--text-3); }
.tl-lessons { list-style: none; margin-top: 14px; border-top: 1px solid var(--line-2); }
.tl-lessons a { display: flex; align-items: center; gap: 12px; padding: 10px 4px; border-bottom: 1px solid var(--line-2); font-size: 14.5px; transition: color .2s; }
.tl-lessons a:hover { color: var(--orange); }
.tl-lessons .ic { margin-left: auto; color: var(--text-3); }
.tl-lid { font-family: var(--mono); font-size: 12px; color: var(--text-3); }
.c-aside { position: sticky; top: calc(var(--header-h) + 28px); display: flex; flex-direction: column; gap: 16px; }
.skills { padding: 24px; border-radius: 18px; background: var(--surface); border: 1px solid var(--line); }
.skills h3 { font-family: var(--serif); font-size: 18px; margin-bottom: 14px; }
.skills ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.skills li { display: flex; gap: 10px; font-size: 14px; line-height: 1.5; color: var(--text-2); }
.skills .ic { color: var(--green); margin-top: 2px; }
.c-note { display: flex; gap: 12px; padding: 18px 20px; border-radius: 16px; background: rgba(212,160,71,.1); border: 1px solid rgba(212,160,71,.3); font-size: 13.5px; line-height: 1.55; color: var(--text-2); }
.c-note .ic { color: var(--gold); }

/* Unidad */
.ac-lessons .sec-item-n { width: auto; padding: 0 10px; }
.ac-lessons .sec-item-t .st { margin-right: 2px; }

/* ═══ LECCIÓN ═══ */
.l-grid { grid-template-columns: 260px minmax(0, 1fr); }
.l-bar { margin-top: 24px; max-width: 420px; height: 6px; border-radius: 3px; background: var(--line); overflow: hidden; }
.l-bar span { display: block; height: 100%; border-radius: 3px; background: var(--orange); }
.l-bar-t { margin-top: 8px; font-size: 13px; color: var(--text-3); }

.ln { display: flex; flex-direction: column; gap: 4px; }
.art-side .ln { max-height: calc(100vh - 180px); overflow-y: auto; }
.ln-unit-h { display: flex; align-items: center; gap: 10px; padding: 8px 6px; font-size: 13.5px; font-weight: 600; color: var(--text-2); }
a.ln-unit-h:hover { color: var(--orange); }
.ln-n { width: 24px; height: 24px; flex-shrink: 0; border-radius: 50%; display: grid; place-items: center; border: 1.5px solid var(--line); font-family: var(--serif); font-weight: 900; font-size: 12px; color: var(--text-3); }
.ln-unit.is-open .ln-unit-h { color: var(--text); }
.ln-unit.is-open .ln-n { border-color: var(--orange); color: var(--orange); }
.ln-unit.is-done .ln-n { background: var(--green); border-color: var(--green); color: #fff; }
.ln-unit ol { list-style: none; display: none; margin: 2px 0 8px 17px; padding-left: 12px; border-left: 1px solid var(--line); }
.ln-unit.is-open ol { display: block; }
.ln-unit ol a { display: flex; align-items: center; gap: 10px; padding: 7px 8px; border-radius: 8px; font-size: 13.5px; line-height: 1.4; color: var(--text-2); }
.ln-unit ol a:hover { background: var(--surface); color: var(--text); }
.ln-unit ol a[aria-current] { background: rgba(247,147,26,.1); color: var(--orange); font-weight: 600; }
.ln-pending { opacity: .5; }
.sidebar .ln-unit ol { display: block; }
.ac-drawer-link { display: flex; align-items: center; gap: 8px; margin: 0 8px 12px; font-size: 13.5px; font-weight: 600; color: var(--link); }
.sidebar .ac-progress-line { margin: 0 8px 16px; }

.obj { padding: 26px 28px; border-radius: 18px; background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow); }
.obj h2 { display: flex; align-items: center; gap: 10px; font-family: var(--serif); font-size: 19px; }
.obj h2 .ic { color: var(--orange); }
.obj ul { list-style: none; margin-top: 16px; display: flex; flex-direction: column; gap: 12px; }
.obj li { display: flex; gap: 12px; font-size: 16px; line-height: 1.55; }
.obj li .ic { margin-top: 3px; color: var(--green); }
.l-body { margin-top: 36px; }
.rds { display: flex; flex-direction: column; gap: 10px; }
.rd { display: flex; align-items: center; gap: 16px; padding: 16px 18px; border-radius: 14px; background: var(--surface); border: 1px solid var(--line); transition: all .25s var(--ease); }
.rd:hover { border-color: rgba(247,147,26,.45); transform: translateX(3px); box-shadow: var(--shadow); }
.rd-ic { width: 42px; height: 42px; flex-shrink: 0; border-radius: 12px; display: grid; place-items: center; background: rgba(247,147,26,.1); color: var(--orange); }
.rd-ic .ic { width: 20px; height: 20px; }
.rd-b { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.rd-sec { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--text-3); }
.rd-sec .lvl { width: 6px; height: 6px; }
.rd-t { font-family: var(--serif); font-weight: 700; font-size: 16.5px; }
.rd-go { margin-left: auto; color: var(--text-3); }
.rd:hover .rd-go { color: var(--orange); }
.act { margin-top: 40px; padding: 26px 28px; border-radius: 18px; color: var(--cream); background: radial-gradient(ellipse 60% 90% at 100% 0%, rgba(212,160,71,.2), transparent 60%), var(--carbon); }
.act-h { display: flex; align-items: center; gap: 10px; font-size: 12px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; color: var(--gold); }
.act p { margin-top: 12px; font-family: var(--serif); font-size: 19px; line-height: 1.6; overflow-wrap: break-word; }
.act-note { display: block; margin-top: 14px; font-size: 12.5px; color: rgba(250,247,242,.5); }
.done-row { margin-top: 40px; display: flex; justify-content: center; }
.btn-done[aria-pressed="true"] { background: transparent; color: var(--green); border: 1.5px solid var(--green); box-shadow: none; }

@media (max-width: 1020px) {
  .c-hero-in, .c-grid, .ac-course { grid-template-columns: 1fr; }
  .c-aside { position: static; }
  .steps { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 860px) { .l-grid { grid-template-columns: 1fr; } }
@media (max-width: 720px) {
  .c-hero-in { padding-bottom: 48px; gap: 36px; }
  .c-hero-r, .ac-course { padding: 22px; }
  .steps { grid-template-columns: 1fr 1fr; }
  .obj, .act { padding: 22px; }
  .tl { gap: 12px; }
  .tl-n { width: 36px; height: 36px; font-size: 14px; }
  .timeline::before { left: 17px; }
  .tl-card { padding: 16px; }
  .tl-top { flex-wrap: wrap; gap: 6px; }
}

/* ═══ QUIZ ═══ */
.st-quiz { border-style: dashed; border-color: var(--gold); }
.ln-quiz, .tl-quiz { font-weight: 600; }
.tl-quiz .tl-lid { color: var(--gold); font-weight: 700; }
.quiz-score { margin-left: 8px; font-size: 12px; font-weight: 600; color: var(--text-3); }
.quiz-score.is-pass { color: var(--green); }
.quiz-card { margin-top: 18px; display: flex; align-items: center; gap: 16px; padding: 20px 22px; border-radius: 16px; background: var(--carbon); color: var(--cream); border: 1px solid rgba(212,160,71,.35); transition: transform .25s var(--ease); }
.quiz-card:hover { transform: translateY(-2px); }
.quiz-card-ic { width: 46px; height: 46px; flex-shrink: 0; border-radius: 50%; display: grid; place-items: center; background: rgba(212,160,71,.15); color: var(--gold); }
.quiz-card-b { display: flex; flex-direction: column; gap: 3px; min-width: 0; flex: 1; }
.quiz-card-b strong { font-family: var(--serif); font-size: 17px; }
.quiz-card-b > span { font-size: 13.5px; color: rgba(250,247,242,.7); }
.quiz-card .quiz-score { margin-left: 0; color: rgba(250,247,242,.6); }
.quiz-card .quiz-score.is-pass { color: #4fd97a; }
.quiz-card.is-done .quiz-card-ic { background: var(--green); color: #fff; }

.quiz { margin-bottom: 8px; }
.quiz-card-in { padding: 30px 32px; border-radius: 20px; background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow); }
.quiz-intro, .quiz-result { text-align: center; }
.quiz-intro h2, .quiz-result h2 { margin-top: 14px; font-family: var(--serif); font-weight: 900; font-size: 26px; }
.quiz-intro p, .quiz-result > p { margin: 10px auto 0; max-width: 460px; color: var(--text-2); }
.quiz-intro .btn, .quiz-result .quiz-actions { margin-top: 22px; }
.quiz-badge { display: inline-grid; place-items: center; width: 64px; height: 64px; border-radius: 50%; background: rgba(247,147,26,.1); color: var(--orange); }
.quiz-badge .ic { width: 30px; height: 30px; }
.quiz-best { font-size: 14px; }
.quiz-best strong { color: var(--text); }
.quiz-top { display: flex; justify-content: space-between; font-size: 13px; color: var(--text-3); }
.quiz-bar { margin: 10px 0 24px; height: 5px; border-radius: 3px; background: var(--line); overflow: hidden; }
.quiz-bar span { display: block; height: 100%; background: var(--orange); border-radius: 3px; transition: width .3s ease; }
.quiz-q { border: 0; }
.quiz-q legend { font-family: var(--serif); font-weight: 700; font-size: 21px; line-height: 1.4; margin-bottom: 18px; }
.quiz-hint { margin: -8px 0 14px; font-size: 13px; color: var(--text-3); }
.quiz-opts { display: flex; flex-direction: column; gap: 10px; }
.quiz-opt { position: relative; display: flex; align-items: flex-start; gap: 14px; padding: 14px 16px; border-radius: 14px; border: 1.5px solid var(--line); background: var(--bg); cursor: pointer; transition: border-color .2s, background .2s; }
.quiz-opt:hover { border-color: rgba(247,147,26,.5); }
.quiz-opt input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.quiz-mark { flex-shrink: 0; width: 20px; height: 20px; margin-top: 2px; border-radius: 50%; border: 2px solid var(--text-3); display: grid; place-items: center; }
.quiz-opt input[type="checkbox"] + .quiz-mark { border-radius: 6px; }
.quiz-opt input:checked + .quiz-mark { border-color: var(--orange); background: var(--orange); box-shadow: inset 0 0 0 3px var(--bg); }
.quiz-opt input:focus-visible + .quiz-mark { outline: 2px solid var(--orange); outline-offset: 2px; }
.quiz-opt:has(input:checked) { border-color: var(--orange); background: rgba(247,147,26,.06); }
.quiz-txt { font-size: 15.5px; line-height: 1.5; }
.quiz-opt.is-right { border-color: var(--green); background: rgba(48,209,88,.08); }
.quiz-opt.is-right .quiz-mark { border-color: var(--green); background: var(--green); box-shadow: inset 0 0 0 3px var(--bg); }
.quiz-opt.is-wrong { border-color: #e5484d; background: rgba(229,72,77,.07); }
.quiz-opt.is-wrong .quiz-mark { border-color: #e5484d; background: #e5484d; box-shadow: inset 0 0 0 3px var(--bg); }
.quiz-opt:has(input:disabled) { cursor: default; }
.quiz-num { display: flex; align-items: center; gap: 12px; }
.quiz-num input { width: 220px; max-width: 100%; padding: 13px 16px; border-radius: 12px; border: 1.5px solid var(--line); background: var(--bg); color: var(--text); font: 600 18px var(--mono); }
.quiz-num input:focus { outline: none; border-color: var(--orange); }
.quiz-num.is-right input { border-color: var(--green); }
.quiz-num.is-wrong input { border-color: #e5484d; }
.quiz-unit { font-size: 15px; color: var(--text-2); }
.quiz-fb { margin-top: 20px; padding: 16px 18px; border-radius: 14px; font-size: 15px; line-height: 1.6; }
.quiz-fb strong { display: inline-flex; align-items: center; gap: 8px; font-size: 15px; }
.quiz-fb p { margin-top: 6px; }
.quiz-fb-ok { background: rgba(48,209,88,.09); border: 1px solid rgba(48,209,88,.35); }
.quiz-fb-ok strong { color: #1f9d45; }
.quiz-fb-ko { background: rgba(229,72,77,.07); border: 1px solid rgba(229,72,77,.3); }
.quiz-fb-ko strong { color: #c9353a; }
[data-theme="dark"] .quiz-fb-ok strong { color: #4fd97a; } [data-theme="dark"] .quiz-fb-ko strong { color: #ff7a7e; }
.quiz-ref { display: inline-flex; align-items: center; gap: 6px; margin-top: 10px; font-size: 14px; font-weight: 600; color: var(--link); }
.quiz-warn { margin-top: 12px; font-size: 14px; color: #c9353a; }
.quiz-actions { margin-top: 22px; display: flex; justify-content: flex-end; }
.quiz-result .quiz-actions { justify-content: center; }
.quiz-end { margin: 18px auto 4px; max-width: 520px; padding: 18px 20px; border: 1px solid var(--line); border-radius: 16px; background: var(--bg); }
.quiz-end p { margin: 0 0 14px; }
.quiz-end.is-complete { border-color: var(--green); }
.quiz-end h3 { margin: 0 0 8px; font-size: 19px; }
.quiz-end-actions { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
/* btn-ghost de la marca es para fondo oscuro; dentro de la tarjeta del quiz va sobre el fondo del tema */
.quiz-card-in .btn-ghost { border-color: var(--line); color: var(--text); }
.quiz-card-in .btn-ghost:hover { border-color: var(--orange); }
.quiz-score-ring { --p: 0; margin: 0 auto; width: 110px; height: 110px; border-radius: 50%; display: grid; place-items: center; background: conic-gradient(var(--orange) calc(var(--p) * 1%), var(--line) 0); }
.quiz-result.is-pass .quiz-score-ring { background: conic-gradient(var(--green) calc(var(--p) * 1%), var(--line) 0); }
.quiz-score-ring span { width: 88px; height: 88px; border-radius: 50%; display: grid; place-items: center; background: var(--surface); font-family: var(--serif); font-weight: 900; font-size: 26px; }
.quiz-review { margin-top: 26px; text-align: left; border-top: 1px solid var(--line); padding-top: 16px; }
.quiz-review summary { cursor: pointer; font-weight: 600; font-size: 14px; color: var(--text-2); }
.quiz-review ol { list-style: none; margin-top: 12px; display: flex; flex-direction: column; gap: 10px; }
.quiz-review li { display: flex; gap: 10px; font-size: 14px; line-height: 1.5; }
.quiz-review li.ok .ic { color: var(--green); } .quiz-review li.ko .ic { color: #e5484d; }
.quiz-review a { color: var(--link); font-weight: 600; }
.quiz-noscript { padding: 20px; }
/* Examen final (assets/examen.js): todas las preguntas en una página, con el reloj fijo arriba */
#examApp { scroll-margin-top: calc(var(--header-h, 68px) + 16px); }
.exam-rules, .exam-list { margin: 16px auto 0; max-width: 480px; text-align: left; display: flex; flex-direction: column; gap: 8px; font-size: 14.5px; color: var(--text-2); }
.exam-rules { padding-left: 20px; }
.exam-list { list-style: none; }
.exam-list a { color: var(--link); font-weight: 600; }
.exam-confirm { margin: 18px auto 0; max-width: 480px; padding: 14px 16px; border-radius: 14px; border: 1px solid rgba(247,147,26,.4); background: rgba(247,147,26,.07); font-size: 14.5px; }
.exam-confirm p { margin: 0; }
.exam-actions { margin-top: 22px; }
.exam-bar { position: sticky; top: calc(var(--header-h, 68px) + 8px); z-index: 5; display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 14px; padding: 12px 18px; border-radius: 14px; background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow); font-size: 14px; color: var(--text-2); }
.exam-bar > span { display: inline-flex; align-items: center; gap: 6px; }
.exam-clock { font: 700 18px var(--mono); color: var(--text); }
.exam-bar.is-low { border-color: #e5484d; }
.exam-bar.is-low .exam-clock { color: #c9353a; }
[data-theme="dark"] .exam-bar.is-low .exam-clock { color: #ff7a7e; }
.exam-form .c-note { margin-bottom: 18px; }
.exam-form input { scroll-margin-top: calc(var(--header-h, 68px) + 90px); }   /* que la barra del reloj no tape el campo al que se lleva el foco */
.exam-q { margin-top: 26px; padding-top: 22px; border-top: 1px solid var(--line); }
.exam-q:first-of-type { margin-top: 0; padding-top: 0; border-top: 0; }
.exam-n { display: block; margin-bottom: 6px; font-size: 12.5px; font-weight: 600; letter-spacing: .02em; color: var(--text-3); }
.exam-n:focus { outline: none; }
.exam-end { margin-top: 26px; padding-top: 18px; border-top: 1px solid var(--line); }
.exam-units { margin: 22px auto 0; max-width: 480px; text-align: left; }
.exam-units h3 { font-size: 16px; margin-bottom: 10px; }
.exam-units ol { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.exam-units li { display: flex; align-items: center; gap: 10px; font-size: 14px; }
.exam-units li span { flex: 1; }
.exam-units li b { font-weight: 600; color: var(--text-2); white-space: nowrap; }
.exam-units li.ok .ic { color: var(--green); } .exam-units li.ko .ic { color: #e5484d; }
.exam-units a { color: var(--link); font-weight: 600; }
@media (max-width: 720px) {
  .exam-bar { padding: 10px 14px; font-size: 13px; }
  .quiz-card-in { padding: 22px 18px; }
  .quiz-q legend { font-size: 18px; }
  .quiz-actions .btn { width: 100%; justify-content: center; }
}

/* ═══ HERRAMIENTAS ═══ */
/* [hidden] tiene que ganar a los display de .tool-fields y .tool-field */
.tool [hidden] { display: none !important; }
.tool { padding: 26px 28px; border-radius: 20px; background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow); }
.tool-fields { display: grid; gap: 12px; }
.tool-field { display: grid; grid-template-columns: 120px minmax(0, 1fr) auto; align-items: center; gap: 12px; padding: 6px 6px 6px 16px; border-radius: 14px; border: 1.5px solid var(--line); background: var(--bg); transition: border-color .2s; }
.tool-field:focus-within { border-color: var(--orange); }
.tool-field.is-error { border-color: #e5484d; }
.tool-field > span { font-size: 13px; font-weight: 600; color: var(--text-2); }
.tool-field input { min-width: 0; border: 0; outline: 0; background: transparent; color: var(--text); font: 600 19px var(--mono); padding: 10px 0; }
.tool-field em { font-style: normal; font-size: 13px; color: var(--text-3); padding: 0 12px; }
.tool-field-wide { grid-template-columns: 140px minmax(0, 1fr) auto; }
.tool-help { margin-top: 8px; font-size: 13px; color: var(--text-3); }
.tool-note { min-height: 1.2em; margin-top: 12px; font-size: 14px; line-height: 1.55; color: var(--text-2); }
.tool-note.is-error { color: #c9353a; }
.tool-note.is-info { padding: 10px 14px; border-radius: 12px; background: rgba(212,160,71,.1); color: var(--text); }
[data-theme="dark"] .tool-note.is-error { color: #ff7a7e; }
.tool-ex { margin-top: 16px; display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-size: 13px; color: var(--text-3); }
.tool-ex button { padding: 5px 12px; border-radius: 999px; border: 1px solid var(--line); background: var(--bg); color: var(--text-2); font: 500 13px var(--sans); cursor: pointer; transition: all .2s; }
.tool-ex button:hover { border-color: var(--orange); color: var(--orange); }
.tool-badge { margin-top: 18px; display: inline-flex; align-items: center; gap: 7px; font-size: 12.5px; font-weight: 600; color: var(--green); }
.tool-badge .ic { color: var(--green); }
.tool-eras { margin-top: 16px; display: grid; grid-template-columns: repeat(8, 1fr); gap: 6px; }
.era { display: flex; flex-direction: column; align-items: center; gap: 2px; padding: 10px 4px; border-radius: 12px; border: 1px solid var(--line); background: var(--bg); cursor: pointer; transition: all .2s; }
.era:hover { border-color: var(--orange); }
.era-n { font-size: 11px; font-weight: 700; letter-spacing: .5px; color: var(--text-3); }
.era-r { font: 700 12.5px var(--mono); color: var(--text); }
.era.is-current { background: var(--orange); border-color: var(--orange); }
.era.is-current .era-n, .era.is-current .era-r { color: #fff; }
.tool-stats { margin-top: 18px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.tool-stats > div { padding: 16px 18px; border-radius: 14px; background: var(--surface-2); border: 1px solid var(--line-2); }
.tool-stats dt { font-size: 12px; font-weight: 600; letter-spacing: .3px; color: var(--text-3); }
.tool-stats dd { margin-top: 6px; font-family: var(--serif); font-weight: 900; font-size: 21px; line-height: 1.25; }
.tool-stats small { display: block; margin-top: 4px; font-family: var(--sans); font-weight: 500; font-size: 12.5px; color: var(--text-3); }
/* Herramientas de la Unidad 4: direcciones, claves y seed */
.tool-field select { width: 100%; grid-column: 2 / -1; min-width: 0; border: 0; outline: 0; background: transparent; color: var(--text); font: 600 15px var(--sans); padding: 10px 0; }
.tool .tool-field + .tool-field { margin-top: 10px; }
.tool-warn { display: flex; gap: 10px; align-items: flex-start; margin-bottom: 16px; padding: 12px 14px; border-radius: 12px; background: rgba(229,72,77,.08); border: 1px solid rgba(229,72,77,.3); font-size: 14px; line-height: 1.5; color: var(--text); }
.tool-warn .ic { flex: none; margin-top: 2px; color: #e5484d; }
.tool-ex button[aria-pressed="true"] { border-color: var(--orange); background: rgba(247,147,26,.1); color: var(--orange); }
.tool-kv { margin-top: 16px; display: grid; gap: 1px; border-radius: 14px; overflow: hidden; border: 1px solid var(--line-2); background: var(--line-2); }
.tool-kv > div { display: grid; grid-template-columns: 170px minmax(0, 1fr); gap: 14px; padding: 11px 16px; background: var(--surface-2); }
.tool-kv dt { font-size: 12.5px; font-weight: 600; color: var(--text-3); }
.tool-kv dd { font-size: 14.5px; line-height: 1.5; overflow-wrap: anywhere; }
.tool-kv dd.mono, .tool-table .mono { font-family: var(--mono); font-size: 13.5px; }
.ok-txt { color: var(--green); }
.tool-kv dd code { font-family: var(--mono); font-size: 13.5px; }
.tool mark { background: rgba(247,147,26,.2); color: inherit; border-radius: 3px; padding: 0 2px; }
.tool-chain { margin-top: 16px; list-style: none; padding: 0; display: grid; gap: 22px; position: relative; }
.tool-chain li { position: relative; padding: 14px 16px; border-radius: 14px; background: var(--surface-2); border: 1px solid var(--line-2); display: grid; gap: 6px; }
.tool-chain li + li::before { content: "↓"; position: absolute; top: -21px; left: 22px; font-size: 16px; color: var(--text-3); }
.tc-k { font-size: 12.5px; font-weight: 600; color: var(--text-3); }
.tool-chain code, .tc-addrs code { font-family: var(--mono); font-size: 13.5px; overflow-wrap: anywhere; color: var(--text); }
.tool-chain code.is-secret { color: #c9353a; }
.tool-chain small { font-size: 12.5px; color: var(--text-3); line-height: 1.45; }
.tc-addrs { display: grid; gap: 8px; }
.tc-addrs > div { display: grid; gap: 2px; padding: 8px 10px; border-radius: 10px; border: 1px solid transparent; }
.tc-addrs > div > span { font-size: 12.5px; color: var(--text-2); }
.tc-addrs > div.is-match { border-color: var(--orange); background: rgba(247,147,26,.07); }
.tool-table-wrap { margin-top: 16px; overflow-x: auto; }
.tool-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.tool-table th { text-align: left; font-size: 12px; font-weight: 600; color: var(--text-3); padding: 6px 10px; border-bottom: 1px solid var(--line); }
.tool-table td { padding: 6px 10px; border-bottom: 1px solid var(--line-2); }
@media (max-width: 560px) { .tool-kv > div { grid-template-columns: 1fr; gap: 4px; } }
/* Unidad 5: transacciones */
.tool-check { display: flex; align-items: center; gap: 10px; margin-top: 14px; font-size: 14.5px; color: var(--text-2); }
.tool-check input { width: 18px; height: 18px; accent-color: var(--orange); }
.txflow { margin-top: 18px; display: grid; grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr); gap: 14px; align-items: center; }
.txcol { display: grid; gap: 8px; }
.txcol h4, .tool-h { font-size: 12.5px; font-weight: 600; color: var(--text-3); margin: 0; }
.tool-h { margin-top: 18px; }
.txarrow { font-size: 22px; color: var(--text-3); }
.txb { display: grid; gap: 2px; padding: 10px 14px; border-radius: 12px; border: 1px solid var(--line-2); background: var(--surface-2); }
.txb span { font-size: 12.5px; color: var(--text-2); }
.txb strong { font-family: var(--mono); font-size: 15px; }
.txb-pay { border-color: rgba(247,147,26,.5); }
.txb-change { border-color: rgba(48,164,108,.5); }
.txb-fee { border-style: dashed; background: transparent; }
.tool-paste { margin-top: 12px; }
.tool-paste summary { cursor: pointer; font-size: 14px; color: var(--text-2); }
.tool-paste textarea { width: 100%; margin-top: 10px; padding: 12px; border-radius: 12px; border: 1.5px solid var(--line); background: var(--bg); color: var(--text); font: 13px var(--mono); resize: vertical; }
.tool-table small { color: var(--text-3); }
@media (max-width: 560px) { .txflow { grid-template-columns: 1fr; } .txarrow { transform: rotate(90deg); justify-self: center; } }
.tool-chart { margin-top: 16px; }
.tool-chart svg { width: 100%; height: auto; display: block; }
.tool-chart figcaption { margin-top: 6px; font-size: 13px; color: var(--text-3); }
.ch-grid { stroke: var(--line); stroke-width: 1; }
.ch-lab { fill: var(--text-3); font: 500 11px var(--sans); }
.ch-line { fill: none; stroke: var(--orange); stroke-width: 2.5; stroke-linejoin: round; }
.ch-marker { stroke: var(--gold); stroke-width: 1.5; stroke-dasharray: 4 4; }
.ch-dot { fill: var(--orange); stroke: var(--surface); stroke-width: 3; }
/* Página de herramienta y catálogo */
.tool-page { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: 48px; align-items: start; padding-top: 40px; padding-bottom: 96px; }
.tool-page > * { min-width: 0; }
.tool-about p { font-size: 15.5px; line-height: 1.7; color: var(--text-2); }
.tool-about p + p { margin-top: 12px; }
.tool-rel { grid-template-columns: 1fr; }
.tools-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.tool-card { display: flex; flex-direction: column; gap: 8px; padding: 26px; border-radius: 18px; background: var(--surface); border: 1px solid var(--line); transition: transform .3s var(--ease), box-shadow .3s, border-color .3s; }
.tool-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: rgba(247,147,26,.45); }
.tool-card-ic { width: 48px; height: 48px; border-radius: 14px; display: grid; place-items: center; background: rgba(247,147,26,.1); color: var(--orange); }
.tool-card-t { margin-top: 6px; font-family: var(--serif); font-weight: 900; font-size: 19px; }
.tool-card-d { font-size: 14px; line-height: 1.55; color: var(--text-2); flex: 1; }
.tool-card-f { display: inline-flex; align-items: center; gap: 6px; margin-top: 8px; font-size: 12.5px; font-weight: 600; color: var(--green); }
.tool-nav { display: flex; align-items: center; gap: 10px; padding: 9px 10px; border-radius: 10px; font-size: 14px; color: var(--text-2); }
.tool-nav:hover { background: var(--bg-hover); color: var(--text); }
.tool-nav.is-current { background: rgba(247,147,26,.1); color: var(--orange); font-weight: 600; }
/* Dentro de una lección */
.l-tool + .l-tool { margin-top: 18px; }
.l-tool-h { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; font-weight: 600; font-size: 14.5px; }
.l-tool-h a { margin-left: auto; display: inline-flex; align-items: center; gap: 5px; font-size: 13px; color: var(--orange); }
@media (max-width: 1020px) { .tool-page { grid-template-columns: 1fr; } .tools-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 720px) {
  .tool { padding: 20px 16px; }
  .tool-field, .tool-field-wide { grid-template-columns: minmax(0, 1fr) auto; padding-left: 14px; }
  .tool-field > span { grid-column: 1 / -1; padding-top: 6px; }
  .tool-eras { grid-template-columns: repeat(4, 1fr); }
  .tool-stats { grid-template-columns: 1fr; }
  .tools-grid { grid-template-columns: 1fr; }
}
/* Unidad 6: UTXO Lab y consolidación */
.utxo-wallet { display: grid; gap: 8px; }
.utxo { display: grid; grid-template-columns: auto 120px minmax(0, 1fr); column-gap: 12px; row-gap: 2px; align-items: center; padding: 10px 14px; border-radius: 12px; border: 1.5px solid var(--line-2); background: var(--surface-2); cursor: pointer; transition: border-color .2s; }
.utxo:has(input:checked) { border-color: var(--orange); background: rgba(247,147,26,.07); }
.utxo input { width: 18px; height: 18px; accent-color: var(--orange); grid-row: span 2; }
.utxo-v { font: 600 15px var(--mono); }
.utxo-f { font-size: 13.5px; color: var(--text-2); }
.utxo-e { grid-column: 3; font-size: 12.5px; color: var(--text-3); }
.utxo-e.is-loss { color: #c9353a; }
[data-theme="dark"] .utxo-e.is-loss, [data-theme="dark"] .bad-txt { color: #ff7a7e; }
.bad-txt { color: #c9353a; }
.utxo-after { margin: 8px 0 0; padding: 0; list-style: none; display: grid; gap: 4px; font: 600 14px var(--mono); }
.utxo-after small { font: 400 13px var(--sans); color: var(--text-3); margin-left: 6px; }
.utxo-after .is-new { color: var(--green); }
.tool .utxo-wallet + .tool-help { margin-top: 10px; }
.tool .tool-help:not([hidden]) + .tool-fields { margin-top: 14px; }
@media (max-width: 560px) { .utxo { grid-template-columns: auto minmax(0, 1fr); } .utxo-f, .utxo-e { grid-column: 2; } .utxo input { grid-row: span 3; } }
/* Unidad 7: Hash Lab, prueba de trabajo, Merkle y bloque */
.tool-kv code mark, .tool-kv code + mark { background: rgba(247,147,26,.28); color: inherit; border-radius: 2px; padding: 0 1px; }
.tool-ex button[data-go] { border-color: var(--orange); background: var(--orange); color: var(--carbon); font-weight: 600; }
.tool-ex button[data-go]:hover { color: #fff; filter: brightness(1.05); }
.tool-ex button:disabled { opacity: .45; cursor: not-allowed; }
.tool-paste input[type="file"] { margin-top: 10px; font: 13px var(--sans); color: var(--text-2); max-width: 100%; }
.mk-tree { margin-top: 14px; display: grid; gap: 10px; }
.mk-row { display: flex; justify-content: center; align-items: center; gap: 8px; flex-wrap: wrap; }
.mk-node { display: grid; gap: 2px; min-width: 0; padding: 8px 10px; border-radius: 10px; border: 1.5px solid var(--line-2); background: var(--surface-2); color: var(--text); font: 600 12px var(--sans); text-align: center; cursor: default; }
.mk-node[data-leaf] { cursor: pointer; }
.mk-node code { font: 500 11.5px var(--mono); color: var(--text-2); }
.mk-node.is-path { border-color: var(--orange); background: rgba(247,147,26,.1); }
.mk-node.is-proof { border-color: var(--text-2); border-style: dashed; }
.mk-node.is-touched code { color: #c9353a; }
.mk-node:disabled { opacity: 1; }
.mk-dup { font: 600 12px var(--sans); color: var(--text-3); }
[data-theme="dark"] .mk-node.is-touched code { color: #ff7a7e; }
@media (max-width: 560px) { .mk-row { flex-wrap: nowrap; gap: 6px; } .mk-node { padding: 8px 6px; flex: 1 1 0; max-width: 90px; } .mk-node code { display: none; } }
/* Unidad 8: calculadoras de comisión */
.tool .tool-h + .tool-fields { margin-top: 8px; }
.tool .tool-fields + .tool-h { margin-top: 18px; }
.tool-fields-gap { margin-top: 18px; }
/* Unidad 9: Lightning */
.ch-bar { margin-top: 16px; display: flex; height: 64px; border-radius: 14px; overflow: hidden; border: 1px solid var(--line); }
.ch-side { display: grid; place-content: center; text-align: center; min-width: 0; padding: 0 6px; transition: width .35s var(--ease); overflow: hidden; }
.ch-side span { font-size: 12px; font-weight: 600; }
.ch-side strong { font: 600 14px var(--mono); }
.ch-a { background: rgba(247,147,26,.18); }
.ch-b { background: rgba(48,164,108,.18); }
.lq-row, .rt-hop { display: grid; grid-template-columns: 90px repeat(2, minmax(0, 1fr)); gap: 10px; align-items: center; margin-top: 10px; }
.rt-hop { grid-template-columns: 130px repeat(3, minmax(0, 1fr)); }
.rt-hop .tool-check { margin-top: 0; }
.rt-hop.is-off .tool-field { opacity: .45; }
.lq-n { font-size: 13px; font-weight: 600; color: var(--text-2); }
.lq-row .tool-field, .rt-hop .tool-field { grid-template-columns: minmax(0, 1fr) auto; padding-left: 12px; }
.lq-row .tool-field > span, .rt-hop .tool-field > span { grid-column: 1 / -1; padding-top: 4px; font-size: 12px; }
.lq-row .tool-field + .tool-field, .rt-hop .tool-field + .tool-field { margin-top: 0; }
.tool-stats dd.dd-small { font-family: var(--sans); font-size: 15px; font-weight: 600; }
.tool-field input[type="range"] { grid-column: 1 / -1; width: 100%; accent-color: var(--orange); }
.htlc-tl { margin: 12px 0 0; padding: 0; list-style: none; display: grid; gap: 8px; }
.htlc-tl li { padding: 10px 14px; border-radius: 12px; background: var(--surface-2); border: 1px solid var(--line-2); font-size: 14px; line-height: 1.5; }
.htlc-tl .tl-note { background: transparent; border-style: dashed; color: var(--text-2); }
@media (max-width: 720px) { .lq-row, .rt-hop { grid-template-columns: 1fr 1fr; } .lq-n, .rt-hop .tool-check { grid-column: 1 / -1; } .rt-hop .tool-field:last-child { grid-column: 1 / -1; } }
.lq-row .tool-field input, .rt-hop .tool-field input { font-size: 16px; }
@media (max-width: 560px) { .lq-row .tool-field em, .rt-hop .tool-field em { display: none; } .lq-row .tool-field, .rt-hop .tool-field { padding-right: 10px; } }
/* Unidad 10 */
.pp-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.pp-grid .tool-kv > div { grid-template-columns: 1fr; gap: 4px; }
.pp-col code { overflow-wrap: anywhere; }
.pp-col mark { background: rgba(229,72,77,.25); color: inherit; }
@media (max-width: 720px) { .pp-grid { grid-template-columns: 1fr; } }
.utxo-wallet.is-off .utxo { opacity: .5; cursor: not-allowed; }

/* ── Cuenta de alumno (paso 6.3) ── */
.acct-btn { gap: 6px; display: inline-flex; align-items: center; }
.acct-btn .ic { color: var(--gold); }
.acct-btn.is-in { border-color: rgba(212,160,71,.55); }
.acct-btn { padding: 0; width: 38px; justify-content: center; }
/* El seudónimo no cabe en la cabecera (contenedor de 1180 px): basta la llave con borde dorado; el nombre va en el title */
.acct-name { display: none; }
@media (max-width: 720px) { .acct-btn { width: 34px; } }
.acct .btn:disabled { opacity: .45; cursor: not-allowed; box-shadow: none; }
.acct .quiz-card-in + .quiz-card-in { margin-top: 18px; }
.acct h2 { font-family: var(--serif); font-weight: 900; font-size: 24px; }
.acct h3 { font-family: var(--serif); font-weight: 700; font-size: 19px; margin-bottom: 10px; }
.acct-sec p { color: var(--text-2); }
.acct-intro { margin: 10px 0 0; color: var(--text-2); line-height: 1.6; }
.acct-tabs { display: flex; gap: 6px; padding: 4px; border-radius: 999px; background: var(--bg); border: 1px solid var(--line); margin-bottom: 20px; }
.acct-tab { flex: 1; padding: 9px 12px; border: 0; border-radius: 999px; background: transparent; color: var(--text-2); font: 600 14px var(--sans); cursor: pointer; }
.acct-tab.is-on { background: var(--orange); color: #0B0D12; }
.acct-form { margin-top: 16px; display: flex; flex-direction: column; gap: 14px; }
.acct-field { display: flex; flex-direction: column; gap: 6px; font-size: 14px; font-weight: 600; }
.acct-field input { padding: 12px 14px; border-radius: 12px; border: 1.5px solid var(--line); background: var(--bg); color: var(--text); font: 500 16px var(--sans); }
.acct-field input:focus { outline: none; border-color: var(--orange); }
.acct-field small { font-weight: 400; color: var(--text-3); line-height: 1.5; }
.acct-methods { border: 0; display: flex; flex-direction: column; gap: 8px; }
.acct-methods legend { font-size: 14px; font-weight: 600; margin-bottom: 8px; }
.acct-alt { margin-top: 22px; padding-top: 16px; border-top: 1px solid var(--line); }
.acct-alt p { font-size: 14px; color: var(--text-3); margin-bottom: 10px; }
.acct-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.acct-note { margin-top: 12px; font-size: 13.5px; line-height: 1.55; color: var(--text-3); }
.acct-ok { margin-top: 12px; font-size: 14px; color: #1f9d45; }
[data-theme="dark"] .acct-ok { color: #4fd97a; }
.acct-code { text-align: center; }
.acct-code > p { margin: 10px auto 0; max-width: 480px; color: var(--text-2); }
.acct-codebox { margin: 18px auto 0 !important; padding: 16px; border-radius: 14px; border: 1.5px dashed var(--gold); background: var(--bg); font: 700 20px var(--mono); letter-spacing: 1px; color: var(--text) !important; user-select: all; word-break: break-all; }
.acct-code .acct-row { justify-content: center; }
.acct-check { display: inline-flex; align-items: center; gap: 8px; margin-top: 18px; font-size: 14px; font-weight: 600; cursor: pointer; }
.acct-code .quiz-actions { justify-content: center; }
.acct-list { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.acct-list li { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 10px 14px; border: 1px solid var(--line); border-radius: 12px; background: var(--bg); }
.acct-list li span { display: inline-flex; align-items: center; gap: 8px; font-weight: 600; }
.acct-list small { font-weight: 400; color: var(--text-3); }
.acct-progress p { margin-top: 12px; color: var(--text-2); }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.acct-danger summary { cursor: pointer; font-weight: 600; color: #c9353a; }
.btn-danger { background: #c9353a; border-color: #c9353a; color: #fff; box-shadow: none; }
.btn-danger:disabled { opacity: .45; cursor: not-allowed; }
.quiz-who { margin-top: 14px !important; font-size: 14px; color: var(--text-3) !important; }
.quiz-who a, .acct a:not(.btn) { color: var(--orange); font-weight: 600; }
.quiz-review-ref { color: var(--orange); font-weight: 600; }
/* Cabecera de Academy con el acceso a la cuenta: hay un botón más que en la enciclopedia, se gana el sitio aquí */
.ac-page .search-pill { width: 170px; }
.ac-page .search-pill:focus-within { width: 320px; }
@media (max-width: 1180px) and (min-width: 1021px) { .ac-page .top-nav { gap: 16px; } .ac-page .top-in { gap: 18px; } .ac-page .top-course .lbl { display: none; } .ac-page .top-course { padding: 8px 11px; } }
@media (max-width: 400px) { .ac-page .top-course { display: none; } }

/* ── Certificado y verificación (paso 6.5). El certificado es siempre claro: es un papel, también en modo oscuro ── */
.cert-verify-wrap { max-width: 880px; margin: 32px auto 64px; }
.cert-app .acct-sec + .cert { margin-top: 24px; }
.cert-form select { padding: 12px 14px; border-radius: 12px; border: 1.5px solid var(--line); background: var(--bg); color: var(--text); font: 500 16px var(--sans); }
.cert-form select:focus { outline: none; border-color: var(--orange); }
.cert-check { margin-top: 4px; align-items: flex-start; }
.cert-check input { margin-top: 3px; flex: none; }
.cert-privacy { padding: 14px 16px; border-radius: 12px; background: var(--bg); border: 1px solid var(--line); font-size: 13.5px; line-height: 1.6; color: var(--text-2); }
.cert-privacy p + p { margin-top: 8px; }
.cert-privacy a { color: var(--orange); font-weight: 600; }
.cert-actions { margin-top: 16px; }
.art-lead.cert-domain { margin-top: 10px; font-size: 14.5px; }
.cert-erase { margin-top: 24px; }
.cert-badge { margin-top: 24px; }
.cert-badge p { margin-top: 8px; color: var(--text-2); }
.cert-erase p { margin-top: 10px; color: var(--text-2); }
.cert-status h2 { display: flex; align-items: center; gap: 10px; }
.cert-status.is-ok h2 .ic { color: #1f9d45; }
.cert-status.is-bad h2 .ic { color: #c9353a; }
[data-theme="dark"] .cert-status.is-ok h2 .ic { color: #4fd97a; }
.cert-facts { display: grid; grid-template-columns: max-content 1fr; gap: 6px 16px; margin-top: 16px; font-size: 14px; }
.cert-facts dt { color: var(--text-3); }
.cert-id { font-family: var(--mono); font-weight: 700; letter-spacing: .5px; word-break: break-all; }

.cert { position: relative; margin-top: 24px; padding: 48px 56px 36px; border-radius: 6px; background: #FAF7F2; color: #0B0D12;
  border: 1px solid rgba(212,160,71,.55); box-shadow: inset 0 0 0 10px #FAF7F2, inset 0 0 0 11px rgba(212,160,71,.55), 0 18px 40px rgba(11,13,18,.12); text-align: center; }
.cert-top { display: flex; align-items: center; justify-content: center; gap: 10px; }
.cert-brand { font-family: var(--serif); font-weight: 900; font-size: 22px; color: #0B0D12; }
.cert-brand span { color: #F7931A; }
.cert-kick { margin-top: 26px; font: 700 12px var(--sans); letter-spacing: 2.5px; text-transform: uppercase; color: #9a7425; }
.cert-intro { margin-top: 18px; font-size: 16px; color: #57534d; }
.cert-name { margin: 10px auto 0; max-width: 680px; font-family: var(--serif); font-weight: 900; font-size: 38px; line-height: 1.2; color: #0B0D12; overflow-wrap: anywhere; }
.cert-name-hidden { font-size: 18px; font-weight: 700; font-style: italic; color: #75706a; }
.cert-text { margin: 18px auto 0; max-width: 600px; font-size: 16px; line-height: 1.65; color: #2b2925; }
.cert-date { margin-top: 14px; font-size: 14px; color: #57534d; }
.cert-foot { display: flex; align-items: center; justify-content: center; gap: 22px; margin-top: 28px; text-align: left; }
.cert-qr { width: 112px; flex: none; }
.cert-qr svg { display: block; width: 100%; height: auto; }
.cert-ver { display: flex; flex-direction: column; gap: 3px; font-size: 12.5px; color: #57534d; min-width: 0; }
.cert-ver .cert-id { font-size: 14px; color: #0B0D12; }
.cert-ver span:nth-of-type(2) { margin-top: 6px; }
.cert-ver a { color: #0B0D12; font-weight: 600; word-break: break-all; }
.cert-legal { margin-top: 24px; font-size: 11.5px; color: #75706a; }
@media (max-width: 640px) {
  .cert { padding: 32px 22px 26px; }
  .cert-name { font-size: 28px; }
  .cert-top img { width: 32px; height: 32px; }
  .cert-brand { font-size: 17px; white-space: nowrap; }
  .cert-ver .cert-id { font-size: 12.5px; }
  .cert-foot { flex-direction: column; text-align: center; }
  .cert-ver { align-items: center; }
}

/* Impresión: solo el certificado, en una hoja A4 apaisada */
@media print {
  @page { size: A4 landscape; margin: 10mm; }
  html, body { background: #fff !important; }
  .top, .sidebar, .sidebar-overlay, .site-footer, .no-print, .art-side, .crumbs { display: none !important; }
  .main, .content-area, .art-grid, .l-grid, .art, .cert-verify-wrap { display: block !important; margin: 0 !important; padding: 0 !important; max-width: none !important; }
  .cert { margin: 0 auto !important; box-shadow: inset 0 0 0 10px #FAF7F2, inset 0 0 0 11px rgba(212,160,71,.8) !important; break-inside: avoid; page-break-inside: avoid;
    -webkit-print-color-adjust: exact; print-color-adjust: exact; }
}

/* Privacidad de Academy (paso 6.7) */
.privacy h2 { margin-top: 32px; }
.privacy p, .privacy li { color: var(--text-2); line-height: 1.7; }
.privacy .c-note { margin-bottom: 8px; }
.privacy-table { width: 100%; border-collapse: collapse; margin-top: 14px; font-size: 15px; }
.privacy-table th, .privacy-table td { text-align: left; vertical-align: top; padding: 12px 14px; border-top: 1px solid var(--line); line-height: 1.6; }
.privacy-table th { width: 30%; font-weight: 600; color: var(--text); }
.privacy-table td { color: var(--text-2); }
@media (max-width: 640px) { .privacy-table th, .privacy-table td { display: block; width: auto; } .privacy-table td { border-top: 0; padding-top: 0; } }

/* Autocustodia: rutas de derivación y descriptores (2026-10-06) */
.tool-field textarea { grid-column: 2 / -1; width: 100%; min-width: 0; border: 0; outline: 0; background: transparent; color: var(--text); font: 500 14px/1.5 var(--mono); padding: 10px 0; resize: vertical; overflow-wrap: anywhere; }
.tool-table tr.gap-row td { font-size: 13px; color: var(--text-2); background: color-mix(in srgb, var(--orange) 10%, transparent); }
.tool-table tr.is-dim td { opacity: .55; }
.tool-table td.mono { overflow-wrap: anywhere; }
@media (max-width: 720px) { .tool-field textarea { grid-column: 1 / -1; } }