.section {
    width: 100%;
}

#fold {
    position: relative;
}

#fold-intro {
    width: 100%;

    color: #ffffff;

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

    position: absolute;

    top: 50%;
    left: 50%;

    text-align: center;

    transform: translate(-50%, -50%);

    z-index: 2;
}

#fold-intro > span {
    font-size: 48px;
    font-weight: normal;

    text-align: center;
    text-transform: uppercase;
}

#fold-background {
    width: 100%;
    height: 100vh;
}

#fold-background > img {
    width: 100%;
    height: 100%;

    filter: brightness(60%);

    object-fit: cover;

    -webkit-user-drag: none;
    user-select: none;
    user-zoom: none;
}

.sectoins-container {
    width: 100%;

    display: flex;
    flex-direction: column;
    gap: 100px;

    padding: 100px;
}

#about-us-intro {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

#about-us-intro > div:first-child {
    width: 100%;

    display: flex;
    align-items: center;
    justify-content: center;
}

#about-us-intro > div:first-child > h2 {
    font-weight: bold;

    margin: 0;

    text-align: center;
    text-transform: uppercase;
}

#about-us-intro > div:last-child > p {
    font-size: 18px;
    line-height: 24px;

    margin: 0;
}

#data {
    width: 100%;
    
    color: #ffffff;
    background: #043045;

    display: flex;
    align-items: center;
    justify-content: center;
    
    padding: 50px;
}

#data > div {
    width: 50%;

    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 20px;
}

#data > div > div:first-child {
    width: 100%;

    display: flex;
    align-items: center;
    justify-content: center;
}

#data > div > div:first-child > h2 {
    font-weight: bold;

    margin: 0;

    text-align: center;
    text-transform: uppercase;
}

#data > div > div:last-child {
    text-align: center;
}

#data > div > div:last-child > span {
    font-size: 24px;
}

#about-us-detailed {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

#about-us-detailed > div:first-child {
    width: 100%;

    display: flex;
    align-items: center;
    justify-content: center;
}

#about-us-detailed > div:first-child > h2 {
    font-weight: bold;

    margin: 0;

    text-align: center;
    text-transform: uppercase;
}

#about-us-detailed > div:last-child > p {
    font-size: 18px;
    line-height: 24px;
    
    margin: 0;
}

#papers {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    gap: 50px;
}

#papers > div:first-child {
    width: 100%;

    display: flex;
    align-items: center;
    justify-content: center;
}

#papers > div:first-child > h2 {
    font-weight: bold;

    margin: 0;

    text-align: center;
    text-transform: uppercase;
}

#papers-container {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    flex-wrap: wrap;
    gap: 50px;
}

.paper {
    width: 400px;
    max-height: 800px;
}

.paper > img {
    width: 100%;
    height: 100%;

    object-fit: contain;
}

@media only screen and (max-width: 1200px) {
    #fold-intro > span {
        font-size: 36px;
    }

    .sectoins-container {
        gap: 50px;

        padding: 50px;
    }
}

@media only screen and (max-width: 900px) {
    #data {
        flex-direction: column;
        gap: 20px;
        
        padding: 20px;
    }

    #data > div {
        width: 100%;
    }

    .paper {
        width: 200px;
        max-height: 400px;
    }
}

@media only screen and (max-width: 700px) {
    #fold-intro > span {
        font-size: 28px;
    }

    #fold-logo {
        width: 64px;
        height: 64px;
    }

    .sectoins-container {
        gap: 20px;

        padding: 20px;
    }

    #data > div > div:first-child > h2 {
        font-size: 18px;
    }

    #data > div > div:last-child > span {
        font-size: 18px;
    }

    #papers {
        gap: 20px;
    }

    #papers-container {
        gap: 20px;
    }
}

@media only screen and (max-width: 500px) {
    #fold-intro > span {
        font-size: 22px;
    }
}