/* Contact Buttons Styles */
.button-nav {
  position: fixed;
  bottom: 20px;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.button-nav-left {
  left: 20px;
}

.button-nav-right {
  right: 20px;
}

.button-nav a {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: #fff;
  font-size: 14px;
  transition: all 0.3s ease;
}

.button-nav-left a:hover {
  transform: translateX(5px);
}

.button-nav-right a:hover {
  transform: translateX(-5px);
}

.button-nav-right a {
  flex-direction: row-reverse;
}

.button-nav-right a span {
  margin-right: 10px;
}

.button-nav-item {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 10px;
  box-shadow: 0 3px 6px rgba(0, 0, 0, 0.16);
}

.button-nav-right .button-nav-item {
  margin-right: 0;
  margin-left: 10px;
}

.button-nav-item img,
.back-top img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

.back-top {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 3px 6px rgba(0, 0, 0, 0.16);
  color: #fff;
  cursor: pointer;
  overflow: hidden;
}

/* No background color for icons with their own background */
.button-nav-item.phone-icon,
.button-nav-item.zalo-icon,
.button-nav-item.facebook-icon,
.button-nav-item.map-icon,
.back-top {
  background-color: transparent !important;
  box-shadow: none;
}

/* Animation for buttons */
.button-nav-item,
.back-top {
  position: relative;
}

.button-nav-item:after,
.back-top:after {
  content: "";
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  z-index: -1;
  animation: sonarEffect 1.5s ease-out 0.5s infinite;
}

@keyframes sonarEffect {
  0% {
    opacity: 0.3;
  }
  40% {
    opacity: 0.5;
    box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.1), 0 0 5px 5px #01a759, 0 0 0 5px rgba(255, 255, 255, 0.5);
  }
  100% {
    box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.1), 0 0 5px 5px #01a759, 0 0 0 5px rgba(255, 255, 255, 0.5);
    transform: scale(1.2);
    opacity: 0;
  }
}

/* Responsive styles */
@media (max-width: 768px) {
  .button-nav-left {
    left: 10px;
  }

  .button-nav-right {
    right: 10px;
  }

  .button-nav-item,
  .back-top {
    width: 35px;
    height: 35px;
  }

  .button-nav a span {
    font-size: 12px;
  }
}