.u31-section {
    padding: 0 15.3125vw;
    width: 69.375vw;
}


#back-home {
    display: flex;
    align-items: center;
    cursor: pointer;
    text-decoration: none;
}

#back-home,
#back-home > span {
    font-family: 'Ubuntu', sans-serif;
    font-weight: 600;
    font-size: 1.25em;
    letter-spacing: 0.0125em;
    color: #4070F4;
}

#back-home > img {
    width: 2em;
    height: 1em;
    margin-right: 0.5em;
}

section > h2.title {
    margin-top: 3.15625em;
    margin-bottom: 0;
    font-family: 'Ubuntu', sans-serif;
    font-size: 1.875em;
}

section h3.question {
    display: list-item;
    list-style: disc;
    margin-left: 1.1em;
    font-family: 'Ubuntu', sans-serif;
    font-size: 1.375em;
    font-weight: 600;
    letter-spacing: 0.00625em;
    color: #4070F4;
}

#section-1 {
    margin-top: 3.75vh;
}

#section-1 h3.question {
    margin-top: 5.3125em;
    margin-bottom: 1.4375em;
}


#annexe > .answer > p {
    font-family: 'Inter', 'SF Pro Display';
    font-size: 1.125em;
    line-height: 2.5em;
    letter-spacing: 0.01125em;
    padding-left: 1.375em;
    margin-top: 0;
    margin-bottom: 1.6875em;
}

#annexe > .answer > p:last-child {
    margin-bottom: 0;
}

#annexe > .answer b {
    display: block;
    margin-top: 0.6875em;
}



#section-2 {
    margin-top: 10vh;
    margin-bottom: 10vh;
}

#section-2 h3.question {
    margin-top: 3.25em;
    margin-bottom: 1.875em;
}

#section-2 .demo-box {
    background: #F2F4FE 0% 0% no-repeat padding-box;
    border-radius: 10px;
    padding: 2.0625em;
    margin-left: 1.375em;
}

#difficult-text {
    font-size: 1em;
    font-family: 'Times New Roman', Times, serif;
    letter-spacing: 0.01em;
    line-height: 1.875em;
}

#clear-text {
    font-size: 1.125em;
    font-family: 'Inter', 'SF Pro Display';
    letter-spacing: 0.01125em;
    line-height: 1.9444em;
}

#falc-text {
    font-size: 1.25em;
    font-family: 'Inter', 'SF Pro Display';
    font-weight: 600;
    letter-spacing: 0.025em;
    line-height: 2em;
}

.tool {
    align-items: center;
    justify-content: center;
    margin-top: 4.75em;
}

.tool-btn {
    font-size: 1.125em;
    padding: 1em 1.25em;
    color: #FFF;
    border: 1px solid #4F78E8D1;
    background: #4F78E8 0% 0% no-repeat padding-box;
    border-radius: 6px;
    text-decoration: none;
}


/* Move to mobile version when < 900px */

@media screen and (max-width:900px) {
    .u31-section {
        padding: 0 8.515625vw;
        width: 82.96875vw;
    }

    .u31-section > h2.title:after {
        display: none;
    }

    #back-home,
    #back-home > span {
        font-size: 1.1875em;
        letter-spacing: 0.011875em;
    }

    section h3.question {
        font-size: 1em;
        line-height: 1.875em;
    }

    #section-1 h3.question {
        margin-top: 2em;
        margin-bottom: 2em;
    }

    #annexe > .answer > p {
        font-size: 0.875em;
        line-height: 2.15em;
    }

    #section-2 .demo-box {
        margin-left: 0;
        padding: 1.5em 1em;
    }

    #clear-text {
        font-size: 0.875em;
        letter-spacing: 0.0875em;
        line-height: 2.15em;
    }

    #falc-text {
        font-size: 1em;
        letter-spacing: 0.02em;
        line-height: 1.5625em;
    }
}