/* ===== Redes flotantes (PILL EXPAND) =====
   ✅ Fix: los demás botones NO se mueven,
   solo se expande el botón activo.
*/

.social-fab {
  position: fixed;
  right: clamp(12px, 2.4vw, 18px);
  top: 50%;
  transform: translateY(-50%);
  display: grid;
  gap: 10px;
  z-index: 9990;

  /* Reservamos el ancho máximo expandido para que NO “empuje” a los demás */
  --expanded: 240px;
  width: var(--expanded);
  justify-items: end;

  opacity: 1;
  pointer-events: auto;
}

.social-fab__btn {
  --size: 48px;
  --bg: #0f172a;

  height: var(--size);
  width: var(--size);
  border-radius: 999px;

  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;

  padding: 0;

  color: #fff;
  text-decoration: none;

  backdrop-filter: blur(6px) saturate(120%);
  background: linear-gradient(180deg, var(--bg), var(--bg));
  box-shadow:
    0 10px 22px rgba(0, 0, 0, 0.22),
    inset 0 1px 0 rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.22);

  position: relative;
  overflow: hidden;

  transition:
    width 0.22s ease,
    padding 0.22s ease,
    transform 0.15s ease,
    box-shadow 0.2s ease,
    filter 0.2s ease;

  will-change: width;

  /* Animación sutil */
  translate: 0 0;
  animation: fabFloat 6.2s ease-in-out infinite;

  justify-self: end;
}

/* Desfase por botón (orgánico) */
.social-fab__btn:nth-child(1) {
  animation-delay: 0s;
}
.social-fab__btn:nth-child(2) {
  animation-delay: 0.15s;
}
.social-fab__btn:nth-child(3) {
  animation-delay: 0.3s;
}
.social-fab__btn:nth-child(4) {
  animation-delay: 0.45s;
}
.social-fab__btn:nth-child(5) {
  animation-delay: 0.6s;
}

@keyframes fabFloat {
  0%,
  100% {
    translate: 0 0;
  }
  50% {
    translate: 0 -2px;
  }
}

.social-fab__btn:hover {
  width: var(--expanded);
  padding: 0 14px;
  justify-content: flex-start;
  transform: translateY(-2px);
  filter: brightness(1.02);
  animation-play-state: paused;
}

.social-fab__btn i {
  font-size: 18px;
  line-height: 1;
  flex: 0 0 auto;
  width: 22px;
  text-align: center;
}

.social-fab__logo {
  width: 22px;
  height: 22px;
  object-fit: contain;
  flex: 0 0 auto;

  background: rgba(255, 255, 255, 0.92);
  border-radius: 999px;
  padding: 3px;
  box-shadow: inset 0 1px 0 rgba(0, 0, 0, 0.06);
}

.social-fab__label {
  display: grid;
  gap: 2px;

  opacity: 0;
  transform: translateX(10px);
  max-width: 0;

  white-space: nowrap;
  overflow: hidden;

  transition:
    opacity 0.18s ease,
    transform 0.18s ease,
    max-width 0.22s ease;
}

.social-fab__label strong {
  font:
    800 12px/1.05 system-ui,
    Segoe UI,
    Roboto,
    Arial,
    sans-serif;
  letter-spacing: 0.2px;
}

.social-fab__label small {
  font:
    600 11px/1.05 system-ui,
    Segoe UI,
    Roboto,
    Arial,
    sans-serif;
  opacity: 0.82;
}

.social-fab__btn:hover .social-fab__label {
  opacity: 1;
  transform: translateX(0);
  max-width: 320px;
}

/* Accesibilidad TAB */
.social-fab__btn:focus-visible {
  outline: 3px solid rgba(255, 255, 255, 0.55);
  outline-offset: 3px;
}

/* Colores por red */
.social-fab__btn.fb {
  --bg: #1877f2;
}
.social-fab__btn.ig {
  --bg: #d6249f;
  background:
    radial-gradient(35% 35% at 30% 30%, #feda75, transparent 60%),
    linear-gradient(180deg, #d6249f, #285aeb);
}
.social-fab__btn.yt {
  --bg: #ff0000;
}
.social-fab__btn.wa {
  --bg: #25d366;
}

/* Aula Virtual */
.social-fab__btn.av {
  --bg: #0ea5e9;
  background: linear-gradient(180deg, #0ea5e9, #0284c7);
}

/* Compacto en móvil */
@media (max-width: 680px) {
  .social-fab {
    gap: 8px;
    width: auto;
  }

  .social-fab__btn {
    --size: 44px;
    animation: none;
    translate: 0 0;
  }

  .social-fab__btn:hover {
    width: var(--size);
    padding: 0;
    justify-content: center;
    transform: none;
  }

  .social-fab__label {
    display: none;
  }
}

/* Reduce motion */
@media (prefers-reduced-motion: reduce) {
  .social-fab__btn,
  .social-fab__label {
    transition: none !important;
    animation: none !important;
    translate: 0 0;
  }
}