/* assets/css/course.css
   Diseño común del curso. Se carga DESPUÉS de Bootstrap y lo ajusta a la marca.
   Colores y medidas: cámbialos solo en :root. */

:root {
  --c-ink: #14213d;          /* texto principal */
  --c-muted: #5b6475;        /* texto secundario */
  --c-line: #e6e8ef;         /* bordes */
  --c-bg: #f5f6fa;           /* fondo de la página */
  --c-surface: #ffffff;      /* tarjetas */
  --c-primary: #2b4acb;      /* azul de la marca */
  --c-primary-soft: #eaeefc;
  --c-accent: #f2a541;       /* ámbar: progreso y detalles */
  --c-success: #1f9d6b;
  --c-sidebar: #101a33;
  --c-sidebar-ink: #c7cee3;

  --radius: 14px;
  --shadow: 0 1px 2px rgba(16, 26, 51, .06), 0 4px 16px rgba(16, 26, 51, .06);
  --sidebar-w: 290px;
  --content-max: 1180px;

  --bs-body-font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --bs-body-color: var(--c-ink);
  --bs-body-bg: var(--c-bg);
  --bs-primary: var(--c-primary);
  --bs-primary-rgb: 43, 74, 203;
  --bs-secondary-color: var(--c-muted);
  --bs-border-color: var(--c-line);
  --bs-link-color: var(--c-primary);
  --bs-link-color-rgb: 43, 74, 203;
}

html { scroll-behavior: smooth; }
body {
  background: var(--c-bg);
  color: var(--c-ink);
  font-size: 15.5px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
.text-secondary { color: var(--c-muted) !important; }

/* ---------- Estructura ---------- */
.shell { display: flex; min-height: 100vh; }
.shell__main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.shell__content {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 28px 32px 48px;
}
#page > .container-fluid { padding: 0 !important; }
#page .lead strong { font-weight: 700; }

/* ---------- Menú lateral ---------- */
.sidebar {
  position: sticky; top: 0;
  width: var(--sidebar-w); height: 100vh;
  flex-shrink: 0;
  display: flex; flex-direction: column;
  background: var(--c-sidebar);
  color: var(--c-sidebar-ink);
  z-index: 1040;
}
.sb-brand { padding: 20px 20px 14px; }
.sb-brand__link { display: flex; align-items: center; gap: 12px; color: #fff; text-decoration: none; }
.sb-brand__logo {
  width: 40px; height: 40px; border-radius: 11px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--c-primary), #5b7cfa);
  color: #fff; font-weight: 800; font-size: 14px; letter-spacing: .04em;
}
.sb-brand__name { display: block; font-weight: 700; font-size: 16px; line-height: 1.2; }
.sb-brand__tag { display: block; font-size: 12px; color: #8b95b3; }

.sb-section { padding: 6px 20px 16px; border-bottom: 1px solid rgba(255,255,255,.07); }
.sb-label {
  display: block; margin-bottom: 6px;
  font-size: 11px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase;
  color: #8b95b3;
}
.sb-select {
  width: 100%; padding: 8px 10px; border-radius: 9px;
  background: rgba(255,255,255,.06); color: #fff;
  border: 1px solid rgba(255,255,255,.12);
  font: inherit; font-size: 14px;
}
.sb-select option { color: var(--c-ink); }
.sb-progress { margin-top: 12px; }
.sb-progress__bar { height: 6px; border-radius: 99px; background: rgba(255,255,255,.1); overflow: hidden; }
.sb-progress__bar span { display: block; height: 100%; background: var(--c-accent); border-radius: 99px; }
.sb-progress__text { margin-top: 6px; font-size: 12px; color: #8b95b3; }

.sb-nav { flex: 1; overflow-y: auto; padding: 10px 10px; }
.sb-nav::-webkit-scrollbar { width: 6px; }
.sb-nav::-webkit-scrollbar-thumb { background: rgba(255,255,255,.12); border-radius: 6px; }
.nav-page {
  display: flex; align-items: center; gap: 10px;
  padding: 7px 10px; margin: 1px 0;
  border-radius: 9px;
  color: var(--c-sidebar-ink); text-decoration: none;
  font-size: 14px; line-height: 1.3;
}
.nav-page:hover { background: rgba(255,255,255,.06); color: #fff; }
.nav-page__num {
  flex-shrink: 0; min-width: 34px; height: 24px; padding: 0 6px;
  display: grid; place-items: center;
  border-radius: 7px;
  background: rgba(255,255,255,.07);
  font-size: 11.5px; font-weight: 600; color: #aab3cd;
}
.nav-page.is-done .nav-page__num { background: rgba(31,157,107,.2); color: #5fd6a4; }
.nav-page.is-active { background: var(--c-primary); color: #fff; }
.nav-page.is-active .nav-page__num { background: rgba(255,255,255,.2); color: #fff; }
.nav-page--home .nav-page__num { background: transparent; color: #8b95b3; }

.sb-footer { padding: 14px 20px 18px; border-top: 1px solid rgba(255,255,255,.07); }

/* ---------- Cabecera ---------- */
.topbar {
  position: sticky; top: 0; z-index: 1020;
  display: flex; align-items: center; gap: 14px;
  height: 60px; padding: 0 32px;
  background: rgba(255,255,255,.88);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--c-line);
}
.tb-menu { display: none; border: 0; background: none; color: var(--c-ink); padding: 6px; margin-left: -6px; }
.tb-crumbs {
  flex: 1; min-width: 0;
  display: flex; align-items: center; gap: 8px;
  font-size: 14px; color: var(--c-muted);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.tb-crumbs a { color: var(--c-muted); text-decoration: none; }
.tb-crumbs a:hover { color: var(--c-primary); }
.tb-crumbs strong { color: var(--c-ink); font-weight: 600; overflow: hidden; text-overflow: ellipsis; }
.tb-btn {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 7px 14px; border-radius: 9px;
  border: 1px solid var(--c-line); background: #fff;
  color: var(--c-ink); text-decoration: none; font-size: 14px; font-weight: 500;
}
.tb-btn:hover { border-color: var(--c-primary); color: var(--c-primary); }

/* ---------- Título de página ---------- */
.page-head { margin-bottom: 24px; }
.page-head__eyebrow {
  font-size: 12.5px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase;
  color: var(--c-primary);
}
.page-head__title {
  margin: 4px 0 0;
  font-size: clamp(26px, 3.2vw, 34px); font-weight: 800; letter-spacing: -.02em;
  color: var(--c-ink);
}

/* ---------- Contenido (ajuste de Bootstrap) ---------- */
#page .card {
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  background: var(--c-surface);
}
#page .card + .card { margin-top: 20px !important; }
#page .h4, #page .h5 { font-weight: 700; letter-spacing: -.01em; }
#page .h6 { font-weight: 700; }
#page hr { border-color: var(--c-line); opacity: 1; margin: 1rem 0; }

/* Recuadros de regla / explicación */
#page .rounded.border, .rule {
  border: 0 !important;
  border-left: 4px solid var(--c-primary) !important;
  background: var(--c-primary-soft);
  border-radius: 10px !important;
}

/* Tablas */
#page .table { --bs-table-bg: transparent; margin-bottom: 0; }
#page .table thead th {
  font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: .05em;
  color: var(--c-muted); border-bottom-width: 1px;
}
#page .table td { padding-top: .6rem; padding-bottom: .6rem; border-color: var(--c-line); }
#page .table tbody tr:hover { background: #fafbfe; }

/* Botones de audio */
#page td.text-end { white-space: nowrap; }
#page [data-tts] {
  width: 34px; height: 34px; padding: 0;
  border-radius: 50%;
  display: inline-grid; place-items: center;
  line-height: 1;
}
#page .btn-outline-primary { --bs-btn-color: var(--c-primary); --bs-btn-border-color: #c9d3f5; --bs-btn-hover-bg: var(--c-primary); --bs-btn-hover-border-color: var(--c-primary); }
#page .btn-outline-secondary { --bs-btn-color: var(--c-muted); --bs-btn-border-color: var(--c-line); --bs-btn-hover-bg: #eef0f5; --bs-btn-hover-color: var(--c-ink); --bs-btn-hover-border-color: var(--c-line); }
.btn-primary { --bs-btn-bg: var(--c-primary); --bs-btn-border-color: var(--c-primary); --bs-btn-hover-bg: #223da8; --bs-btn-hover-border-color: #223da8; }
.btn { border-radius: 10px; font-weight: 500; }

/* Quiz */
#page .question {
  padding: 14px 16px;
  border: 1px solid var(--c-line);
  border-radius: 12px;
  background: #fff;
}
#page .question label {
  display: flex !important; align-items: center; gap: 10px;
  padding: 7px 10px; margin-top: 4px;
  border-radius: 8px; cursor: pointer;
}
#page .question label:hover { background: var(--c-bg); }
#page .question input[type="radio"] { accent-color: var(--c-primary); width: 16px; height: 16px; }
#page [data-score]:not(:empty) { font-weight: 600; color: var(--c-ink) !important; }

/* Columna lateral de apoyo (checklist) */
@media (min-width: 992px) {
  #page .col-lg-4 > .card { position: sticky; top: 84px; }
}

/* ---------- Pie: completar + navegación ---------- */
.page-done {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  margin-top: 32px; padding: 18px 22px;
  border-radius: var(--radius);
  background: var(--c-surface); border: 1px solid var(--c-line); box-shadow: var(--shadow);
}
.page-done.is-done { background: #ecf8f2; border-color: #bfe8d4; }
.page-done__title { font-weight: 700; }
.page-done__text { font-size: 14px; color: var(--c-muted); }
.page-done .btn { white-space: nowrap; display: inline-flex; align-items: center; gap: 6px; }

.page-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 16px; }
.page-nav__link {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 18px; border-radius: var(--radius);
  border: 1px solid var(--c-line); background: var(--c-surface);
  color: var(--c-ink); text-decoration: none; font-weight: 600;
  transition: border-color .15s, transform .15s;
}
.page-nav__link:hover { border-color: var(--c-primary); color: var(--c-primary); transform: translateY(-1px); }
.page-nav__link small { display: block; font-size: 12px; font-weight: 500; color: var(--c-muted); }
.page-nav__link--next { justify-content: flex-end; text-align: right; grid-column: 2; }

/* ---------- Móvil ---------- */
.sidebar-backdrop { display: none; }
@media (max-width: 991.98px) {
  .sidebar {
    position: fixed; left: 0; top: 0;
    transform: translateX(-100%);
    transition: transform .25s ease;
  }
  .sb-open .sidebar { transform: none; box-shadow: 0 0 40px rgba(0,0,0,.3); }
  .sb-open .sidebar-backdrop {
    display: block; position: fixed; inset: 0; z-index: 1030;
    background: rgba(16,26,51,.45);
  }
  .tb-menu { display: inline-grid; place-items: center; }
  .topbar { padding: 0 16px; }
  .shell__content { padding: 20px 16px 40px; }
}
@media (max-width: 575.98px) {
  .tb-btn span { display: none; }
  .page-done { flex-direction: column; align-items: stretch; text-align: center; }
  .page-nav { grid-template-columns: 1fr; }
  .page-nav__link--next { grid-column: 1; }
  #page .card.p-4 { padding: 18px !important; }
}

/* ---------- Compatibilidad con páginas antiguas ---------- */
/* El botón propio de cada página lo sustituye el pie común "Marcar como completada" */
#page #doneBtn { display: none !important; }
/* Algunas páginas se diseñaron sobre fondo oscuro: devolvemos contraste en fondo claro */
#page .stat, #page .q-card, #page .q-item, #page .pill, #page .kbd,
#page .flashcard, #page .v-row { border-color: var(--c-line) !important; }
#page .stat, #page .q-card { background: #fafbfe !important; }
#page .v-row:hover { background: var(--c-bg) !important; }
#page .book-text {
  background: #fbfaf7; border: 1px solid #ece7dc; border-radius: 12px; padding: 18px;
  font-size: .95rem;
}
#page .figure-missing {
  padding: 16px 18px; border: 1px dashed #c9d3f5; border-radius: 12px; background: var(--c-primary-soft);
}