body {
    background: url(images/background.jpg) no-repeat bottom center fixed;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
    color: white;
    font-family: Helvetica, sans-serif;

    min-height: 100%;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

h1 {
    font-weight: bold;
    line-height: 1em;
    font-size: 5em;
    margin-bottom: 0;
}

h4 {
    margin-top: 0.5em;
    margin-bottom: 0.75em;
    font-family: "PT-Serif", serif;
    font-style: italic;
}

.btn {
    margin-top: 0.5em;
    margin-right: 0.5em;
    border-radius: 20px;
}