/* ==========================================================================
   Botón flotante de WhatsApp + mensaje de Astravia Studio
   DESIGN.md: anclado abajo a la derecha, esmeralda profundo, acento #25D366.
   ========================================================================== */

.wa {
  --wa-emerald: #16774a;                     /* blanco sobre este verde: 5.5:1 */
  --wa-emerald-dark: #115f3b;
  --wa-accent: #25d366;
  position: fixed;
  right: 1.5rem;
  bottom: calc(1.5rem + env(safe-area-inset-bottom, 0px));
  z-index: 90;                               /* por debajo del menú (100), por encima del contenido */
  display: grid;
  justify-items: end;
  gap: var(--space-3);
}

/* ---------- Botón redondo ---------- */
.wa__fab {
  position: relative;
  display: grid;
  place-items: center;
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 50%;
  color: #fff;
  background: var(--wa-emerald);
  box-shadow:
    0 0 0 0.1875rem rgb(37 211 102 / 0.4),                 /* aro esmeralda del DESIGN.md */
    0 0.625rem 1.5625rem -0.1875rem rgb(37 211 102 / 0.25); /* capa 3 de elevación */
  transition: transform var(--dur-base) var(--ease-out), background-color var(--dur-base) var(--ease-out);
  touch-action: manipulation;
}
.wa__fab:hover { background: var(--wa-emerald-dark); transform: translateY(-0.125rem); }
.wa__fab:active { transform: scale(0.96); }
.wa__fab svg { width: 1.875rem; height: 1.875rem; }
.wa__fab:focus-visible { outline: 0.1875rem solid var(--color-ring); outline-offset: 0.3125rem; border-radius: 50%; }

/* Punto de estado: En línea */
.wa__badge {
  position: absolute;
  top: 0.0625rem;
  right: 0.0625rem;
  width: 0.9375rem;
  height: 0.9375rem;
  border-radius: 50%;
  background: var(--wa-accent);
  border: 0.125rem solid #fff;
}

/* Pulso suave del aro: solo 3 veces, para llamar la atención sin cansar */
.wa__fab::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 0.125rem solid var(--wa-accent);
  opacity: 0;
  pointer-events: none;
}
@media (prefers-reduced-motion: no-preference) {
  .wa__fab::before { animation: wa-pulse 2.4s var(--ease-out) 1.5s 3; }
  @keyframes wa-pulse {
    0%   { opacity: 0.7; transform: scale(1); }
    100% { opacity: 0;   transform: scale(1.6); }
  }
}

/* ---------- Tarjeta con el mensaje ---------- */
.wa__card {
  position: relative;
  width: min(19rem, calc(100vw - 3rem));
  padding: var(--space-5);
  background: var(--color-surface);
  border: 0.0625rem solid var(--color-border-warm);
  border-radius: var(--radius-md);
  box-shadow:
    0 0.75rem 2.25rem -0.375rem rgb(44 53 57 / 0.16),       /* capa 2 del DESIGN.md */
    inset 0 0.0625rem 0 rgb(255 255 255 / 0.8);
  transform-origin: bottom right;
  transition: opacity var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out);
}
.wa__card[hidden] { display: none; }
.wa__card:not(.is-open) {
  opacity: 0;
  transform: translateY(0.75rem) scale(0.96);
  pointer-events: none;
}
/* Colita del globo, apuntando al botón */
.wa__card::after {
  content: "";
  position: absolute;
  right: 1.375rem;
  bottom: -0.4375rem;
  width: 0.875rem;
  height: 0.875rem;
  background: var(--color-surface);
  border-right: 0.0625rem solid var(--color-border-warm);
  border-bottom: 0.0625rem solid var(--color-border-warm);
  transform: rotate(45deg);
}

.wa__close {
  position: absolute;
  top: var(--space-2);
  right: var(--space-2);
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--color-ink-soft);
  cursor: pointer;
  touch-action: manipulation;
  transition: background-color var(--dur-fast) var(--ease-out);
}
.wa__close:hover { background: #f4efea; }
.wa__close svg { width: 1rem; height: 1rem; }

.wa__from {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin: 0 var(--space-6) var(--space-3) 0;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-ink);
}
.wa__dot { width: 0.5625rem; height: 0.5625rem; border-radius: 50%; background: var(--wa-accent); flex: none; }
.wa__state { font-weight: 400; color: var(--color-ink-soft); }

.wa__body { position: relative; }

/* Escribiendo...: ocupa el mismo sitio que el mensaje, así la tarjeta no cambia de tamaño */
.wa__typing {
  position: absolute;
  top: 0.25rem;
  left: 0;
  display: flex;
  gap: 0.3125rem;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-pill);
  background: #f4efea;
  transition: opacity var(--dur-fast) var(--ease-out);
}
.wa__typing i {
  width: 0.4375rem;
  height: 0.4375rem;
  border-radius: 50%;
  background: var(--color-ink-soft);
  animation: wa-typing 1s ease-in-out infinite;
}
.wa__typing i:nth-child(2) { animation-delay: 0.15s; }
.wa__typing i:nth-child(3) { animation-delay: 0.3s; }
@keyframes wa-typing { 0%, 60%, 100% { opacity: 0.35; transform: none; } 30% { opacity: 1; transform: translateY(-0.1875rem); } }

.wa__msg {
  margin: 0 0 var(--space-4);
  font-family: var(--font-serif);
  font-size: var(--fs-md);
  font-weight: 500;
  line-height: 1.45;
  color: var(--color-ink);
  text-wrap: balance;
}
.wa__msg,
.wa__cta { transition: opacity var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out); }
.wa__card:not(.is-typed) .wa__msg { opacity: 0; transform: translateY(0.25rem); }
.wa__card:not(.is-typed) .wa__cta { opacity: 0; visibility: hidden; }     /* sin foco hasta que aparece */
.wa__card.is-typed .wa__typing { opacity: 0; pointer-events: none; }

.wa__cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  width: 100%;
  min-height: 2.75rem;
  padding: 0 var(--space-5);
  font-size: var(--fs-sm);
  font-weight: 600;
  color: #fff;
  background: var(--wa-emerald);
  border-radius: var(--radius-pill);
  transition: opacity var(--dur-base) var(--ease-out), background-color var(--dur-base) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}
.wa__cta:hover { background: var(--wa-emerald-dark); }
.wa__cta:active { transform: scale(0.98); }
.wa__cta svg { width: 1.125rem; height: 1.125rem; }

/* La barra de contacto no debe taparse con el pie de página */
@media (max-width: 40rem) {
  .wa { right: 1rem; bottom: calc(1rem + env(safe-area-inset-bottom, 0px)); }
}

@media (prefers-reduced-motion: reduce) {
  .wa__fab,
  .wa__card,
  .wa__msg,
  .wa__cta,
  .wa__typing { transition: none; }
  .wa__typing i { animation: none; opacity: 0.6; }
}