.main-navigation{background-color:#004d40;font-family:'Open Sans',sans-serif;box-shadow:0 2px 5px rgba(0,0,0,0.1)}.main-navigation a{color:white;padding:15px 20px;display:inline-block;text-decoration:none;font-weight:600;transition:background-color 0.3s ease,color 0.3s ease}.main-navigation a:hover,.main-navigation a:focus{background-color:#00796b;color:#fff}.site-header{position:sticky;top:0;z-index:9999}.menu-toggle{display:none}@media (max-width:768px){.main-navigation a{display:block;padding:12px 20px;border-bottom:1px solid #00695c}.menu-toggle{display:block;background-color:#004d40;color:white;padding:10px 15px;font-size:18px;cursor:pointer}}