@media (max-width: 600px){
    main .right-content{
        width: 100%;
        margin: auto;
        padding: 0;
    }
    main .right-content .black-box{
        max-width: 400px;
        text-align: center;
        align-content: center;
    }

    .black-box hr{
        width: 90%;
    }

    .black-box h1{
        margin: 5% 0 5% 3%;
        font-size: 30px;
    }

    .black-box .title{
        color: white;
        font-size: 20px;
        margin: 8% 0 3% 3%;
    }
    
    .black-box .sub-title{
        color: rgba(255, 255, 255, 0.603);
        margin: 8% 0 8% 3%;
        font-size: 18px;
    }
}