.main-nav {
    background-color: #000;
    padding: 10px 0;
    top: 0;
    z-index: 100;
    overflow-x: auto;
}

.main-nav ul {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    list-style: none;
    margin: 0;
    padding: 0;
}

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

.main-nav ul a {
    text-decoration: none;
    color: #fff;
    font-weight: bold;
    padding: 8px 4px;
    transition: border-bottom 0.3s;
    white-space: nowrap;
}

.main-nav ul a:hover {
    border-bottom: 2px solid #fff;
}

.hero-logo {
    display: block;
    margin: 0 auto 0;
    max-width: 300px;
    height: auto;
    padding-bottom: 5px;
}