/* ==========================================================================
   cka-shell.css — chrome compartido del sitio CKA:
   navegación superior, selector de idioma, motor i18n y bloque de práctica.
   Depende de las variables de color que define cada módulo en :root.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1 · i18n
   Cada bloque traducible se escribe como hermanos consecutivos:
     <p data-l="es">…</p><p data-l="en">…</p><p data-l="it">…</p>
   Solo se OCULTAN los idiomas inactivos: el activo no recibe ninguna
   declaración de display, así que conserva su layout original (flex, grid…).
   El fallback lo hace cka-shell.js agregando el token del idioma faltante
   al data-l del bloque español (data-l="es en"), por eso el selector usa ~=.
   -------------------------------------------------------------------------- */
html[data-lang="es"] [data-l]:not([data-l~="es"]),
html[data-lang="en"] [data-l]:not([data-l~="en"]),
html[data-lang="it"] [data-l]:not([data-l~="it"]) { display: none !important; }

/* --------------------------------------------------------------------------
   2 · Barra de navegación
   -------------------------------------------------------------------------- */
.cka-topnav {
  position: sticky; top: 0; z-index: 999;
  display: flex; align-items: center; gap: 3px; flex-wrap: wrap;
  background: #14213d; padding: 9px 14px; border-radius: 8px; margin-bottom: 30px;
  font-family: 'JetBrains Mono', 'Consolas', monospace; font-size: 12px;
  box-shadow: 0 2px 10px rgba(20, 33, 61, .18);
}
.cka-topnav a { color: #c8d4ea; text-decoration: none; padding: 4px 9px; border-radius: 5px; transition: background .12s, color .12s; }
.cka-topnav a:hover { background: rgba(255, 255, 255, .12); color: #fff; }
.cka-topnav a.active { background: #326ce5; color: #fff; }
.cka-topnav .cka-home { font-weight: 600; color: #fff; }
.cka-topnav .cka-home:hover { background: rgba(255, 255, 255, .18); }
.cka-topnav .cka-spacer { flex: 1; }
.cka-topnav .cka-sep { width: 1px; height: 16px; background: rgba(255, 255, 255, .18); margin: 0 6px; }

/* selector de idioma */
.cka-lang { display: flex; border: 1px solid rgba(255, 255, 255, .22); border-radius: 5px; overflow: hidden; margin-left: 4px; }
.cka-lang button {
  font-family: inherit; font-size: 11px; letter-spacing: .5px; text-transform: uppercase;
  padding: 4px 8px; border: 0; border-right: 1px solid rgba(255, 255, 255, .18);
  background: transparent; color: #9fb0d0; cursor: pointer; transition: background .12s, color .12s;
}
.cka-lang button:last-child { border-right: 0; }
.cka-lang button:hover { background: rgba(255, 255, 255, .12); color: #fff; }
.cka-lang button[aria-pressed="true"] { background: #326ce5; color: #fff; font-weight: 600; }

/* enlace al PDF de esta página en el idioma activo (lo arma cka-shell.js) */
.cka-pdf {
  font-family: inherit; font-size: 10px; letter-spacing: .8px; font-weight: 600;
  margin-left: 8px; padding: 3px 8px; border-radius: 5px;
  border: 1px solid rgba(255, 255, 255, .22); color: #9fb0d0;
  text-decoration: none; transition: background .12s, color .12s, border-color .12s;
}
.cka-pdf:hover { background: rgba(255, 255, 255, .12); color: #fff; border-color: rgba(255, 255, 255, .4); }

/* aviso de sincronización del idioma (se enciende solo si hay sync configurado) */
.cka-lang-sync { font-size: 10px; color: #55658a; padding: 4px 2px 4px 7px; cursor: default; }

/* --------------------------------------------------------------------------
   3 · Bloque de práctica (.lab) — los ejercicios al final de cada módulo
   -------------------------------------------------------------------------- */
.lab { margin-top: 64px; }
.lab .seccion-header { border-bottom-color: var(--accent); }
.lab .seccion-num { font-size: 40px; }

.lab-meta { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-bottom: 20px; }
.lab-progress {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: .5px; font-weight: 600;
  background: var(--accent-soft); color: var(--accent); padding: 5px 12px; border-radius: 20px;
}
.lab-progress.full { background: var(--good-soft); color: var(--good); }
.lab-reset { font-family: var(--mono); font-size: 11px; background: none; border: 1px solid var(--line); color: var(--ink-muted); border-radius: 20px; padding: 4px 11px; cursor: pointer; }
.lab-reset:hover { border-color: var(--bad); color: var(--bad); }

/* tarjeta de ejercicio */
.ex { border: 1px solid var(--line); border-radius: 6px; background: var(--bg-card); margin-bottom: 16px; overflow: hidden; }
.ex.done { border-color: var(--good); }
.ex-head { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; padding: 12px 16px; background: var(--bg-alt); border-bottom: 1px solid var(--line); }
.ex.done .ex-head { background: var(--good-soft); border-bottom-color: var(--good); }
.ex-tag { font-family: var(--mono); font-size: 11px; font-weight: 700; letter-spacing: 1px; background: var(--ink); color: #fff; padding: 3px 9px; border-radius: 3px; }
.ex.done .ex-tag { background: var(--good); }
.ex-tag.t { background: var(--bad); }
.ex-head h3 { font-family: var(--serif); font-size: 17px; font-weight: 600; margin: 0; flex: 1; min-width: 200px; }
.ex-time { font-family: var(--mono); font-size: 10.5px; color: var(--ink-muted); letter-spacing: .5px; }
.ex-done { font-family: var(--mono); font-size: 11px; color: var(--ink-soft); display: flex; align-items: center; gap: 6px; cursor: pointer; user-select: none; }
.ex-done input { accent-color: var(--good); cursor: pointer; width: 15px; height: 15px; margin: 0; }

.ex-body { padding: 14px 18px 4px; }
.ex-body ol, .ex-body ul { margin-left: 20px; }
.ex-body > p:first-child { margin-top: 0; }

/* manifest listo para aplicar — la URL la completa cka-shell.js (wireManifests) */
.mf {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  margin: 12px 0 14px; padding: 9px 12px;
  background: var(--ink); border-radius: 5px;
}
.mf-tag {
  font-family: var(--mono); font-size: 9.5px; font-weight: 700;
  letter-spacing: 1.4px; text-transform: uppercase;
  color: var(--ink); background: #fff; padding: 3px 8px; border-radius: 3px; flex: none;
}
.mf code {
  font-family: var(--mono); font-size: 12px; color: #fff;
  background: none; padding: 0; flex: 1; min-width: 200px;
  overflow-x: auto; white-space: nowrap;
}
.mf-copy {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .6px;
  background: none; border: 1px solid rgba(255,255,255,.35); color: #fff;
  border-radius: 20px; padding: 4px 11px; cursor: pointer; flex: none;
}
.mf-copy:hover { border-color: #fff; background: rgba(255,255,255,.12); }
.mf-copy.ok { border-color: var(--good); color: var(--good); }

/* solución colapsable */
.sol { border-top: 1px dashed var(--line); margin: 8px 0 0; }
.sol > summary {
  cursor: pointer; list-style: none; padding: 10px 18px;
  font-family: var(--mono); font-size: 11.5px; letter-spacing: .8px; text-transform: uppercase;
  color: var(--good); background: var(--good-soft); display: flex; align-items: center; gap: 8px;
}
.sol > summary::-webkit-details-marker { display: none; }
.sol > summary::before { content: "▸"; font-size: 13px; transition: transform .15s; }
.sol[open] > summary::before { transform: rotate(90deg); }
.sol > summary:hover { filter: brightness(.97); }
.sol-body { padding: 4px 18px 14px; border-top: 1px solid var(--line-soft); }
.sol-body pre { margin-top: 12px; }

/* "Claves" — el resumen conceptual de cada solución */
.claves { margin-top: 14px; border-left: 3px solid var(--accent); background: var(--accent-soft); padding: 10px 14px; border-radius: 0 4px 4px 0; }
.claves > .claves-t { font-family: var(--mono); font-size: 10px; text-transform: uppercase; letter-spacing: 1.5px; color: var(--accent); font-weight: 600; margin-bottom: 6px; }
.claves ul { margin: 0 0 0 18px; font-size: 14.5px; }
.claves li { margin-bottom: 6px; }
.claves li:last-child { margin-bottom: 0; }

/* checklist de autoevaluación */
.selfcheck { border: 1px solid var(--accent); border-radius: 6px; padding: 16px 20px; background: var(--accent-soft); margin-top: 26px; }
.selfcheck h3 { margin-top: 0; color: var(--ink); }
.selfcheck ul { list-style: none; margin-left: 0; }
.selfcheck li { display: flex; gap: 9px; align-items: flex-start; margin-bottom: 7px; font-size: 14.5px; }
.selfcheck li::before { content: "☐"; font-family: var(--mono); color: var(--accent); font-size: 15px; line-height: 1.4; }

@media (max-width: 720px) {
  .ex-head h3 { min-width: 0; font-size: 15.5px; }
  .cka-topnav { font-size: 11px; }
}

/* el sello de impresión solo existe en papel (ver cka-print.css) */
.print-stamp { display: none; }