.imp-nav-btn {
  position: fixed;
  bottom: 24px;
  left: 24px;
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: rgba(20, 20, 30, 0.8);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 0 20px rgba(100, 150, 255, 0.3);
  z-index: 9999;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  overflow: hidden;
  text-decoration: none;
}

.imp-nav-btn img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.imp-nav-btn:hover, .imp-nav-btn:focus {
  transform: scale(1.05) translateY(-5px);
  box-shadow: 0 5px 25px rgba(130, 100, 255, 0.5);
  outline: none;
}

@media (max-width: 768px) {
  .imp-nav-btn {
    width: 56px;
    height: 56px;
    bottom: 16px;
    left: 16px;
  }
}