/* MENU */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: white;
    padding: 0.5rem 1rem;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-sizing: border-box;
}
@media (min-width: 980px) {
    #logo_sx {
        width: 5rem;
        height: auto;
    }
    #logo_dx {
        width: 6rem;
        height: auto;
        visibility: hidden;
    }

    #menu ul {
        list-style: none;
        margin: 0 auto;
        padding: 0;
        display: flex;
        justify-content: center;
        align-items: center;
        flex: 1;
    }

    #menu ul li {
        margin: 0 1rem;
    }

    #menu ul li a {
        color: #337def;
        text-decoration: none;
        font-weight: 500;
        display: block;
        padding: 0.5rem 0;
    }

    #menu ul li a:hover {
        color: #0a2957;
    }
}
@media (max-width: 980px) {
    #logo_sx {
        width: 11rem;
        height: auto;
    }
    #logo_dx {
        width: 10rem;
        height: auto;
        display: none;
    }

    #menu ul {
        list-style: none;
        margin: 0 auto;
        padding: 0;
        display: flex;
        justify-content: center;
        align-items: center;
        flex: 1;
    }

    #menu ul li {
        margin: 0 1rem;
    }

    #menu ul li a {
        color: #337def;
        text-decoration: none;
        font-weight: 500;
        display: block;
        padding: 0.5rem 0;
        font-size: 2.5rem;
    }

    #menu ul li a:hover {
        color: #0a2957;
    }
}