header {
  width: 100%;
  background-color: #fff;
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid #ccc;
}

.header-container {
  max-width: 1200px;
  margin: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 20px;
}

.main-nav ul {
  display: flex;
  gap: 25px;
}

.main-nav li a {
  font-weight: 600;
  font-size: 16px;
  color: #000;
}

.social-icons a {
  margin-left: 15px;
}

.whatsapp-icon {
  position: fixed;
  bottom: 25px;
  right: 25px;
  background: #25D366;
  padding: 12px;
  border-radius: 50%;
  color: #fff;
  font-weight: bold;
  z-index: 10000;
}



.whatsapp-icon {
  position: fixed;
  bottom: 25px;
  right: 25px;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: #25D366; /* WhatsApp green */
  display: flex;
  justify-content: center;
  align-items: center;
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
  z-index: 10000;
  cursor: pointer;
  transition: all 0.3s ease;
}

.whatsapp-icon img {
  width: 35px;   /* size of WhatsApp logo inside the circle */
  height: 35px;
}