@media screen and (max-width: 991px) {
    .about-left {
        margin-bottom: 50px;
    }
}

@media screen and (max-width: 767px) {
    .hero-content h1 {
        font-size: 48px;
    }

    .hero-content h3 {
        font-size: 32px;
    }

    .about-content h2 {
        font-size: 50px;
    }

    .section-heading h2 {
        font-size: 34px;
    }
}

@media screen and (max-width: 560px) {
    .container {
        max-width: 400px;
    }

    .hero-content h1 {
        font-size: 40px;
    }

    .portfolio-list ul li {
        margin-bottom: 20px;
    }
}

@media screen and (max-width: 320px) {
    .hero-content h1 {
        font-size: 34px;
    }

    .hero-content h3 {
        font-size: 28px;
    }
}