/* phones */
@media screen and (max-width: 767px) {
    nav {
        border: none;
    }

    nav ul {
        display: flex;
        flex-direction: column;
    }

    nav ul li {
        padding: 0;
    }

    header {
        height: 100vh;
    }

    .banner {
        position: relative;
        top: 38px;
        width: 100%;

    }

    .banner-desc {
        font-size: 3rem;
    }

    .box-container {
        display: block;

    }

    .box {
        margin: 0 auto;

    }

    .box-title {
        position: relative;
        top: 8px;
    }

    .box img {
        width: 90%;
    }
}

/* tablet and smaller desktops */
@media screen and (min-width: 768px) and (max-width:1200px) {

    nav ul {
        display: flex;
        justify-content: center;
    }

    nav ul li {
        float: none;

        padding-left: 5%;
    }

    .banner {
        width: 100vw;
    }

    .box-container {
        grid-template-columns: 1fr 1fr;
    }
}