@media (max-width: 991px) {
    .navbar-toggler {
        border-color: rgba(255, 255, 255, 0.1); 
    }
    .navbar {
        background-color: var(--black-color);
        margin: 0;
    }

    .hero {
        height: auto; 
        padding-top: 100px; 
        padding-bottom: 50px; 
    }

    .hero h1 {
        font-size: 1.8rem;
        font-weight: 600;
        color: var(--white-color); 
        padding-bottom: 30px;
    }

    .avatar {
        max-height: 300px; 
        width: auto; 
    }
    .services{
        display: flex;
        justify-content: center;
        align-items: center;
        padding: 10px;
    }
    .services .container{
        padding: 0;
        display: flex;
        flex-direction: column;
    }
    .services .container .col{
        flex: 1 1 100%; 
        height: auto;
    }
    .services h1{
        text-align: center;
    }
}