practice-time-landing-page/assets/imagens/styles/main.css

*{
    margin: 0%;
    padding: 0%;
    box-sizing: border-box;
}

.page-header{
    display: flex;
    justify-content: center;
    padding: 28px;
    background: black;
}

.header-logo{
    display: block;
}

.main-banner {
    width: 100%;
}

@media screen and (max-width:414px){
       .main-banner-desktop{
        display: none;
       }
}

@media screen and (min-width:415px){
    .main-banner-mobile{
        display: none;
    }

}