header {
    display: flex;
    flex-direction: row;
    justify-content: space-between;

    height: 4rem;
    width: 100%;
    padding: 1em;
    z-index: 10;

    border-bottom: 1px solid #ddd;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);

    font-family: "Roboto Mono", monospace;
}

nav {
    display: flex;
    justify-content: center;
    align-items: center;

    width: 100%;
    margin: 0;
    padding: 0;
}

nav>a {
    margin-right: 1em;
    padding: 0;

    color: var(--gray-5);
    text-decoration: none;
}

nav>a.nav-current {
    color: var(--red);
    text-decoration: underline;
    text-decoration-thickness: 5px;
    text-underline-offset: 20px;
}

nav>a:hover {
    color: var(--red);
}

#hamburger {
    display: none;
}

#hamburger>.bar {
    display: block;

    width: 25px;
    height: 3px;
    margin: 5px auto;
    border-radius: 2px;

    -webkit-transition: all 0.3s ease-in-out;
    transition: all 0.3s ease-in-out;
    background-color: #101010;
}

/* Media queries for responsiveness */

@media screen and (max-width: 1008px) {
    nav {
        position: absolute;
        flex-direction: column;

        top: 4rem;
        left: -100%;
        width: 100%;
        z-index: 10;

        text-align: center;

        background-color: var(--gray-2);
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
    }

    nav.active {
        left: 0;
    }

    nav>a {
        margin-right: 0;
        margin-top: 0.6em;
        margin-bottom: 0.6em;
    }

    nav>a.nav-current {
        text-decoration-thickness: 3px;
        text-underline-offset: unset;
    }

    #hamburger {
        display: block;
        cursor: pointer;
    }

    #hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }

    #hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    #hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
}