@media (min-width: 0px) {

    /* Common elements styles */

    html,
    body {
        width: 100%;
        max-width: 100vw;
    }

    h1,
    h2,
    h3,
    h4,
    nav,
    p,
    button,
    a,
    form,
    li,
    ol,
    ul {
        font-family: 'Fira Sans Condensed', sans-serif;
    }

    h1 {
        font-size: 2.625rem;
    }

    h2 {
        font-size: 1.75rem;
        font-style: italic;
    }

    h3,
    button {
        font-size: 1rem;
    }

    h4 {
        font-size: 1.25rem;
    }

    p,
    li,
    ol,
    a {
        font-size: 1rem;
        color: black;
        margin: 0.5rem 0 1rem 0;
        /* letter-spacing: 0.025rem; */
        line-height: 2rem;

    }

    a {
        font-size: 1.75rem;
        text-decoration: none;
    }

    button {
        background-color: #B18F39;
        width: 15rem;
        height: 3rem;
        border: none;
        color: white;
        padding: 2%;
    }

    img {
        width: 60vw;
        object-fit: cover;
        margin: 5rem auto 0 auto;
    }

    main {
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
    }

    section {
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        width: 100%;
        max-width: 100vw;
    }

    section::before {
        content: "";
        /* position: absolute; */
        width: 40vw;
        height: 100%;
        border-bottom: 2px solid #F1A208;
        display: inline-block;
    }

    .container {
        display: flex;
        align-items: flex-start;
        justify-content: center;
        flex-direction: column;
        width: 70vw;
        margin: 8vh 0;
    }

    header {
        display: flex;
        flex-direction: column;
        justify-content: flex-end;
        align-items: flex-start;
        width: 100%;
        max-width: 100vw;
        height: 80vh;
        background-image: url("emotion_ai_robot.jpg");
        background-size: cover;
        background-position-y: 50%;
    }

    .header_container {
        width: 50vw;
        margin-left: 10%;
        margin-bottom: 5%;
    }

    .header_txt {
        color: white;
    }

    h1.header_txt {
        font-size: 3.5rem;
    }

    h2.header_txt {
        font-size: 2rem;
    }

    h3.header_txt {
        margin: 0;
    }

    p.header_txt {
        color: white;
        font-size: 1rem;
    }

    a.header_txt {
        color: #F1A208;
        font-size: 1rem;
    }

    .introduction,
    .origins,
    .problems,
    .conclusion {
        background-color: #DAFBFB;
    }

    h2 {
        margin-top: 3rem;
    }

    h2::after {
        content: "";
        /* position: absolute; */
        width: 10vw;
        height: 2rem;
        border-bottom: 2px solid #F1A208;
        display: block;
    }

    .bibliography .container {
        width: 40vw;
    }

    .bibliography p {
        font-size: 0.5rem;
        margin: 0 0 1rem 0;
        line-height: 1rem;
    }

    .recommendations .container {
        background-color: #F1A208;
        padding: 5%;
    }

    .recommendations h1,
    .recommendations li {
        color: white;
    }

    .recommendations li {
        font-size: 1.5rem;
    }


}