/* ── ANIMAÇÃO PULSE PARA O BOTÃO ── */
@keyframes pulseBtn {
  0%, 100% {
    box-shadow: 0 4px 15px rgba(39, 233, 181, 0.3);
  }
  50% {
    box-shadow: 0 4px 30px rgba(39, 233, 181, 0.7);
  }
}

/* ── RIPPLE EFFECT ── */
.btn-importar-arquivo::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              height 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              opacity 0.6s ease;
  opacity: 0;
  pointer-events: none;
}

.btn-importar-arquivo:active::after {
  width: 300%;
  height: 300%;
  opacity: 1;
  transition: width 0.1s ease, height 0.1s ease, opacity 0.1s ease;
}