/* ============================================================
   tech-facts.css — Tarjeta rotativa de "¿Sabías que…?"
   Sección compañera del juego.
   ============================================================ */

.tech-facts {
  padding: var(--section-padding-y) 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  position: relative;
  overflow: hidden;
}

.tech-facts::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 1px 1px, var(--text-muted) 1px, transparent 0);
  background-size: 28px 28px;
  opacity: 0.05;
  mask-image: radial-gradient(ellipse 70% 80% at 50% 50%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 70% 80% at 50% 50%, #000 30%, transparent 80%);
  pointer-events: none;
  z-index: 0;
}

.tech-facts__inner {
  position: relative;
  z-index: 1;
  max-width: 920px;
  margin: 0 auto;
}

.tech-facts__header {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-5);
  margin-bottom: var(--spacing-8);
  text-align: center;
}

.tech-facts__header h2 {
  margin: var(--spacing-2) 0 var(--spacing-2);
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  letter-spacing: -0.03em;
}

.tech-facts__subtitle {
  color: var(--text-secondary);
  margin: 0 auto;
  max-width: 580px;
  font-size: var(--font-size-base);
  line-height: 1.6;
}

/* ─── Filtros por categoría ─── */
.tech-facts__categories {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-2);
  justify-content: center;
}

.tech-facts__chip {
  padding: var(--spacing-1) var(--spacing-3);
  background: var(--bg-card-solid);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tech-facts__chip:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.tech-facts__chip.is-active {
  background: var(--gradient-button);
  border-color: transparent;
  color: #fff;
  font-weight: var(--font-weight-semibold);
}

/* ─── Card ─── */
.tech-facts__card-wrap {
  position: relative;
}

.tech-facts__card {
  position: relative;
  padding: var(--spacing-10) var(--spacing-8);
  background: var(--bg-card-solid);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-3xl);
  box-shadow: var(--shadow-md);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-3);
  min-height: 320px;
  overflow: hidden;
}

.tech-facts__card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-button);
}

.tech-facts__card.is-entering {
  animation: techFactIn 480ms cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes techFactIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

.tech-facts__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: var(--radius-2xl);
  background: var(--gradient-button);
  color: #fff;
  margin-bottom: var(--spacing-2);
  box-shadow: var(--shadow-md);
}

.tech-facts__icon .icon { width: 28px; height: 28px; }

.tech-facts__meta {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-1);
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: var(--font-weight-semibold);
}

.tech-facts__category {
  color: var(--accent-secondary);
}

.tech-facts__year {
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.tech-facts__title {
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  font-weight: var(--font-weight-bold);
  margin: var(--spacing-2) 0 var(--spacing-3);
  letter-spacing: -0.03em;
  max-width: 18ch;
}

.tech-facts__body {
  font-size: var(--font-size-base);
  line-height: 1.7;
  color: var(--text-secondary);
  margin: 0;
  max-width: 600px;
}

.tech-facts__source {
  margin-top: var(--spacing-4);
  padding-top: var(--spacing-4);
  border-top: 1px dashed var(--border-color);
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  font-weight: var(--font-weight-medium);
}

.tech-facts__source em {
  font-style: normal;
  color: var(--text-tertiary);
  font-weight: var(--font-weight-semibold);
}

/* ─── Controles ─── */
.tech-facts__controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-3);
  margin-top: var(--spacing-6);
  flex-wrap: wrap;
}

.tech-facts__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  width: 42px;
  height: 42px;
  border-radius: var(--radius-full);
  background: var(--bg-card-solid);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tech-facts__btn:hover {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #fff;
  transform: translateY(-1px);
}

.tech-facts__btn--shuffle {
  width: auto;
  padding: 0 var(--spacing-4);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
}

.tech-facts__counter {
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  color: var(--text-tertiary);
  font-variant-numeric: tabular-nums;
  min-width: 60px;
  text-align: center;
}

@media (max-width: 640px) {
  .tech-facts__card {
    padding: var(--spacing-8) var(--spacing-5);
    min-height: 280px;
  }
  .tech-facts__btn--shuffle span { display: none; }
  .tech-facts__btn--shuffle { width: 42px; padding: 0; }
}