nav-style.css

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
   }
   body {
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
   }
   a {
    text-decoration: none;
   }
   li {
    list-style: none;
   }
   /* NAVBAR MENU */
   .navbar {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background-color: rgb(19, 4, 104);
    color: #fff;
   }
   .nav-links a {
    color: #fff;
   }
   .menu {
    display: flex;
    gap: 1em;
    font-size: 18px;
   }
   .menu li:hover {
    background-color: rgb(28, 6, 150);
    border-radius: 5px;
    transition: 0.3s ease;
   }
   .menu li {
    padding: 5px 14px;
   }
   /* DROPDOWN MENU */
   .services {
    position: relative; 
   }
   .dropdown {
    background-color: rgb(19, 4, 104);
    padding: 1em 0;
    position: absolute; 
    display: none;
    border-radius: 8px;
    top: 35px;
   }
   .dropdown li + li {
    margin-top: 10px;
   }
   .dropdown li {
    padding: 0.5em 1em;
    width: 8em;
    text-align: center;
   }
   .dropdown li:hover {
    background-color: rgb(28, 6, 150);
   }
   .services:hover .dropdown {
    display: block;
   }
   
   input[type=checkbox]{
    display: none;
   } 

   .hamburger {
    display: none;
    font-size: 24px;
    user-select: none;
   }
   /* APPLYING MEDIA QUERIES */
   @media (max-width: 768px) {
   .menu { 
    display:none;
    position: absolute;
    background-color:rgb(19, 4, 104);
    right: 0;
    left: 0;
    text-align: center;
    padding: 16px 0;
   }
   .menu li:hover {
    display: inline-block;
    background-color:rgb(28, 6, 150);
    transition: 0.3s ease;
   }
   .menu li + li {
    margin-top: 12px;
   }
   input[type=checkbox]:checked ~ .menu{
    display: block;
   }
   .hamburger {
    display: block;
   }
   .dropdown {
    left: 50%;
    top: 30px;
    transform: translateX(35%);
   }
   .dropdown li:hover {
    background-color: rgb(28, 6, 150);
   }