* {font-size: 1.1rem;}

body {
    background-color: #f4f4f4;
    font: 15px/1.5 Arial, Helvetica, sans-serif;
}

.top-navbar {
    max-height: 30vh;
    width: 95vw;
}

.header {
    min-height: 45vh;
    width: 100%;
    background-image: url(../img/header.jpg);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    position: relative;
    padding-bottom: 10px;
}

.header h1 {
    font-size: 2rem;
    color: #fff;
    text-align: center;
    padding: 20% 10% 15px;
}

.header p, .header p a {
    text-align: center;
    font-size: 1.5rem;
    color: #fff;
    text-decoration: none;
}

.top-navbar img {
    height: auto;
    width: 100%;
}

.container h2 {
    font-size: 1.5rem;
    text-align: center;
}

h5, h6 {text-align: center;}

.box-img {
    max-width: 100%;
}

.box h3 {
    text-align: center;
    font-size: 1.4rem;
}

@media (min-width: 678px) {

    .top-navbar img {
        height: 20vh;
        width: auto;
        display: block;
        margin: auto;
    }

    .header {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .header h1 {
        font-size: 2.5rem;
        color: #fff;
        text-align: center;
        padding: none;
    }

    .box {
        max-width: 400px;
    }

}