/* navigation.css */
nav ul {
    list-style-type: none;
    padding: 0;
    background-color: #2e2e2e;
    text-align: center;
    margin: 0;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

nav ul li {
    margin: 0 1em;
}

nav ul li a {
    text-decoration: none;
    color: var(--primary-color);
    font-weight: var(--font-weight-bold);
    padding: 0.5em 1em;
    display: inline-block;
    position: relative;
    transition: all 0.3s ease;
}

nav ul li a::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--secondary-color);
    transition: width 0.3s ease;
}

nav ul li a:hover::after {
    width: 100%;
}