nav {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 20px;
    background-color: light-dark(#fff, #000);
    box-shadow: 0 2px 4px light-dark(rgba(0, 0, 0, 0.1), rgba(255, 255, 255, 0.2));
}

.hamburger-menu {
    display: block;
    width: 30px;
    height: 30px;
    background-color: transparent;
    border: none;
    cursor: pointer;
}

.hamburger-menu__line {
    display: block;
    width: 100%;
    height: 2px;
    background-color: light-dark(#333, #DDD);
    margin: 5px 0;
    transition: transform 0.2s ease-in-out;
}
  
.hamburger-menu[aria-expanded="true"] .hamburger-menu__line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
  
.hamburger-menu[aria-expanded="true"] .hamburger-menu__line:nth-child(2) {
    opacity: 0;
}
  
.hamburger-menu[aria-expanded="true"] .hamburger-menu__line:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}
  
.nav-links {
    display: none;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-links.show {
    display: flex;
    flex-direction: column;
}
  
.nav-links li {
    margin: 10px 0;
}
  
.nav-link {
    font-family: 'Montserrat', sans-serif;
    font-size: 18px;
    font-weight: 700;
    color: light-dark(#333, #DDD);
    text-decoration: none;
    transition: color 0.2s ease-in-out;
}

.nav-link.active {
    color: #0077c2;
}
  
.nav-link:hover, .nav-link:focus {
    color: #0077c2;
}

.nav-links li:last-child a {
    background-color: light-dark(#333, #DDD);
    color: light-dark(#fff, #000);
    padding: 10px 15px;
    border-radius: 10%;
}

.nav-links li:last-child a:hover, .nav-links li:last-child a:focus {
    background-color: light-dark(#fff, #000);
    color: light-dark(#333, #DDD);
}

.nav-links.active li:last-child a {
    background-color: light-dark(#0077c2, #005f99);
    color: light-dark(#fff, #000);
}

@media screen and (min-width: 768px) {
    nav {
        align-items: center;
        justify-content: center;
    }

    .nav-links li {
        margin: 0 15px;
    }

    .hamburger-menu {
      display: none;
    }
  
    .nav-links {
      display: flex;
    }
}