@media (max-width: 1660px) {
    .hero-books {
        left: 10%;
        top: -50px;
    }
}

@media (max-width: 1600px) {
    .hero-pen {
        right: 2%;
    }
}

@media (max-width: 1500px) {
    .hero-pen {
        right: 25%;
        top: -100px;
    }
}

@media (max-width: 1300px) {
    .hero-books {
        left: 50px;
        top: -50px;
    }
}

@media (max-width: 1100px) {
    .hero-books {
        width: 300px;
    }

    .hero-pen {
        right: 15%;
        top: -180px;
    }
}

@media (max-width: 1000px) {
    .hero-books {
        width: 250px;
    }

    .hero-pen {
        right: 5%;
        top: -180px;
    }
}

@media (max-width: 900px) {
    .hero-books {
        position: static;    
        display: block;   
        margin: 20px auto;
        width: 250px;  
    }
}

@media (max-width: 750px) {
    .hero-pen {
        right: 5%;
        top: -180px;
        opacity: 50%;
    }

}

@media (max-width: 600px) {
    .hero-books {
        width: 200px;  
    }

    .hero-pen {
        display: none;
    }

}

@media (max-width: 430px) {
    .title-1st {
        font-size: 65px;
    }
}