.bottom-navbar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  height: 40px;
  background: #fff;
  display: flex;
  justify-content: space-around;
  align-items: center;
  box-shadow: 0 -2px 8px rgba(0,0,0,0.06);
  z-index: 1100;
}

.nav-btn {
  background: none;
  border: none;
  outline: none;
  height: 40px;
  width: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  margin: 0 4px;
  transition: border-color 0.2s;
  cursor: pointer;
  padding: 0;
}

.nav-btn .material-symbols-outlined {
  font-size: 24px;
  color: #222;
  transition: color 0.2s;
}

.nav-btn.active .material-symbols-outlined {
  color: #FF6B6B;
}

@media (max-width: 480px) {
  .bottom-navbar {
    height: 40px;
  }
  .nav-btn {
    height: 36px;
    width: 36px;
  }
  .nav-btn .material-symbols-outlined {
    font-size: 20px;
  }
}