/* ===================================================================
   COMPONENTES REUTILIZABLES — botones, tarjetas, buscador, etc.
   =================================================================== */

/* ====================== BOTONES ====================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 700;
  padding: 12px 20px;
  border: none;
  border-radius: var(--radio-chico);
  cursor: pointer;
  transition: transform var(--transicion), background var(--transicion), box-shadow var(--transicion);
  text-decoration: none;
  white-space: nowrap;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }
.btn svg { flex-shrink: 0; }

.btn-principal  { background: var(--rojo-cetis); color: var(--blanco); box-shadow: var(--sombra-suave); }
.btn-principal:hover  { background: var(--rojo-oscuro); }

.btn-secundario { background: var(--blanco); color: var(--rojo-cetis); border: 2px solid var(--rojo-cetis); }
.btn-secundario:hover { background: var(--rojo-suave); }

.btn-claro      { background: rgba(255,255,255,0.2); color: var(--blanco); }
.btn-claro:hover { background: rgba(255,255,255,0.32); }

.btn-grande { padding: 14px 28px; font-size: 1.05rem; }
.btn-bloque { width: 100%; }

/* ====================== TARJETAS ====================== */
.tarjeta {
  background: var(--blanco);
  border-radius: var(--radio);
  box-shadow: var(--sombra);
  padding: 22px;
}

/* ---- Cuadrícula de temas ---- */
.grid-temas {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
}
.tarjeta-tema {
  background: var(--blanco);
  border: 1px solid var(--gris-borde);
  border-radius: var(--radio);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  cursor: pointer;
  transition: transform var(--transicion), box-shadow var(--transicion), border-color var(--transicion);
  text-decoration: none;
  color: inherit;
  position: relative;
  overflow: hidden;
}
.tarjeta-tema::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 5px;
  background: var(--rojo-cetis);
}
.tarjeta-tema:hover {
  transform: translateY(-3px);
  box-shadow: var(--sombra);
  border-color: var(--rojo-claro);
  text-decoration: none;
}
.tarjeta-tema .icono-tema {
  width: 46px; height: 46px;
  display: flex; align-items: center; justify-content: center;
  background: var(--rojo-suave);
  border-radius: 12px;
  flex-shrink: 0;
}
.tarjeta-tema .nombre-tema { font-weight: 800; font-size: 1rem; line-height: 1.25; }
.tarjeta-tema .desc-tema   { font-size: 0.84rem; color: var(--gris-texto); flex-grow: 1; }
.tarjeta-tema .pie-tema {
  display: flex; align-items: center; justify-content: space-between;
  font-size: 0.8rem; color: var(--gris-texto);
  border-top: 1px solid var(--gris-borde);
  padding-top: 9px;
}
.tarjeta-tema .num-preguntas {
  background: var(--rojo-suave); color: var(--rojo-cetis);
  font-weight: 700; padding: 2px 10px; border-radius: 999px;
}

/* ---- Estrella unidad ---- */
.estrella-unidad { display: inline-flex; align-items: center; vertical-align: middle; margin-right: 4px; }

/* ---- Separador de unidad ---- */
.titulo-unidad {
  display: flex; align-items: center; gap: 10px;
  font-size: 1.15rem; font-weight: 800; color: var(--rojo-cetis);
  margin: 28px 0 12px;
}
.titulo-unidad .linea { flex-grow: 1; height: 2px; background: var(--gris-borde); }

/* ====================== BUSCADOR ====================== */
.buscador-caja { position: relative; margin: 4px 0 22px; }
.buscador-caja input {
  width: 100%;
  font-size: 1rem;
  padding: 13px 16px 13px 46px;
  border: 2px solid var(--gris-borde);
  border-radius: 999px;
  background: var(--blanco);
  -webkit-appearance: none;
}
.buscador-caja input:focus { outline: none; border-color: var(--rojo-cetis); }
.buscador-caja .lupa {
  position: absolute;
  left: 15px; top: 50%;
  transform: translateY(-50%);
  opacity: .55;
  display: flex; align-items: center;
  pointer-events: none;
}

/* ====================== FORMULARIOS ====================== */
.campo { margin-bottom: 16px; }
.campo label { display: block; font-weight: 700; font-size: 0.9rem; margin-bottom: 6px; }
.campo input[type="text"],
.campo select {
  width: 100%;
  font-family: inherit;
  font-size: 1rem;
  padding: 12px 14px;
  border: 2px solid var(--gris-borde);
  border-radius: var(--radio-chico);
  background: var(--blanco);
  transition: border-color var(--transicion);
  -webkit-appearance: none;
}
.campo input[type="text"]:focus,
.campo select:focus { outline: none; border-color: var(--rojo-cetis); }

/* ====================== INSIGNIAS / AVISOS ====================== */
.insignia {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 0.78rem; font-weight: 700;
  padding: 3px 10px; border-radius: 999px;
}
.insignia-roja  { background: var(--rojo-suave); color: var(--rojo-cetis); }
.insignia-verde { background: var(--verde-suave); color: var(--verde-ok); }
.insignia-gris  { background: var(--gris-borde);  color: var(--gris-texto); }

.aviso {
  border-radius: var(--radio-chico);
  padding: 13px 15px;
  font-size: 0.9rem;
  display: flex; gap: 10px; align-items: flex-start;
}
.aviso-info    { background: #EAF1FC; color: #1B459B; }
.aviso-amarillo { background: #FFF6E0; color: #8A6300; }
.aviso .icono  { font-size: 1.1rem; line-height: 1.3; }

/* ====================== PUNTOS DE DIFICULTAD ====================== */
.dif-punto {
  display: inline-block;
  width: 10px; height: 10px;
  border-radius: 50%;
  margin-right: 5px;
  vertical-align: middle;
}
.dif-verde   { background: var(--verde-ok); }
.dif-amarillo { background: var(--amarillo-aviso); }
.dif-rojo    { background: var(--rojo-error); }

/* ====================== CANALES (guias.html) ====================== */
.canales-section { margin-bottom: 32px; }
.grid-canales {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 12px;
  margin-top: 14px;
}
.canal-card {
  background: var(--blanco);
  border: 1px solid var(--gris-borde);
  border-radius: var(--radio);
  padding: 14px 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  color: inherit;
  text-align: center;
  transition: box-shadow var(--transicion), transform var(--transicion);
}
.canal-card:hover { box-shadow: var(--sombra); transform: translateY(-2px); text-decoration: none; }
.canal-ico {
  width: 44px; height: 44px;
  background: var(--rojo-cetis);
  color: var(--blanco);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-weight: 900; font-size: 0.95rem;
  letter-spacing: 0.5px;
}
.canal-nombre { font-weight: 700; font-size: 0.88rem; color: var(--negro-texto); }
.canal-desc   { font-size: 0.75rem; color: var(--gris-texto); }
.canales-tema {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 8px;
}

/* ====================== RESPONSIVO ====================== */
@media (max-width: 640px) {
  .grid-temas { grid-template-columns: 1fr 1fr; gap: 10px; }
  .tarjeta-tema { padding: 14px 12px; gap: 8px; }
  .tarjeta-tema .icono-tema { width: 40px; height: 40px; border-radius: 10px; }
  .tarjeta-tema .nombre-tema { font-size: 0.9rem; }
  .tarjeta-tema .desc-tema { font-size: 0.78rem; }
  .titulo-seccion { font-size: 1.25rem; }
  .btn-grande { padding: 13px 22px; font-size: 1rem; }
  .grid-canales { grid-template-columns: repeat(3, 1fr); gap: 8px; }
  .canal-ico { width: 36px; height: 36px; font-size: 0.82rem; }
  .canal-nombre { font-size: 0.78rem; }
  .canal-desc { display: none; }
}

@media (max-width: 360px) {
  .grid-temas { grid-template-columns: 1fr; }
  .grid-canales { grid-template-columns: repeat(2, 1fr); }
}