.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 30px;
  background-color: #4CAF50;
  color: white;
  box-shadow: 0 2px 5px rgba(0,0,0,0.2);
  position: sticky;
  z-index: 100;
  margin-bottom: 10px;
  
}

.site-header .logo h1 {
  margin: 0;
  font-size: 1.8rem;
  text-shadow: 1px 1px 3px rgba(0,0,0,0.2);
}

.main-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 25px;
}

.main-nav ul li a {
  color: white;
  text-decoration: none;
  font-weight: bold;
  transition: color 0.2s;
}

.main-nav ul li a:hover {
  color: #c8e6c9;
}

@media (max-width: 600px) {
  .site-header {
    flex-direction: column;
    text-align: center;
    padding: 10px;
  }

  .main-nav ul {
    flex-direction: column;
    gap: 10px;
    margin-top: 10px;
  }
}