.spring-btn {
  transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* нажатие */
.spring-btn.pressed {
  transform: scale(0.85);
  transition: transform 0.1s;
}

/* отскок */
.spring-btn.rebound {
  transform: scale(1.08);
  transition: transform 0.2s;
}

/* возврат */
.spring-btn {
  transform: scale(1);
}

@media (hover: hover) {
  .spring-btn:hover {
    transform: scale(1.05);
  }
}