practice-time-landing-page/style/style.css

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

header {

    display: flex;
    justify-content: center;
    padding: 28px 0;
    background-color: #000;
}

.logo-header {
    display: block;
}

.banner-principal {
    width: 100%;
}

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

}

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