body {
    background-image: url(../images/bg-intro.png);
    background-size: 100% auto;
}

#intro-arrow {
    position: fixed;
    top: 20rem;
    right: -3rem;
    z-index: 50;
    cursor: pointer;
}
#intro-arrow img {
    width: 25%;
    filter: drop-shadow(0 6px 5px rgba(0, 0, 0, 0.44));
}

#intro-sidebar {
    display: none;
    position: fixed;
    right: 0;
    width: 40%;
    height: 62.5vw;
    background-image: url(../images/intro-sidebar.png);
    background-size: 100% auto;
    background-repeat: no-repeat;
    z-index: 52;
}

#intro-sidebar .menu {
    width: 50%;
    position: absolute;
    top: 20%;
    right: 7%;
    text-align: right;
}

#intro-sidebar .menu li {
    margin-top: 1.9rem;
}
#intro-sidebar .menu li a {
    font-size: 2vw;
    font-weight: bold;
    color: white;
    text-decoration: none;
}

/* Mobile Style */
@media only screen and (max-width: 768px) {

    .container h2,
    .container h3 {
        display: none;
    }

    #intro-arrow {
        top: 2rem;
        right: -5.5rem;
    }
    #intro-arrow img {
        width: 20%;
    }

    #intro-sidebar {
        width: 100%;
        height: 100%;
        background-size: auto 100%;
        background-position: right;
    }
    #intro-sidebar .menu {
        width: 50%;
        top: 45%;
        right: 10vw;
        transform: translateY(-50%);
    }

    #intro-sidebar .menu li {
        margin-top: 1.5rem;
    }
    #intro-sidebar .menu li a {
        font-size: 1.2rem;
    }

}