body {
    background-attachment: fixed;
    background-image: url(bg-people.jpg);
    background-position: center;
    background-size: cover;
    font-family: 'Roboto', Arial;
    height: 100vh;
    position: relative;
}

header {
    background-color: #5a6455;
    text-align: center;
}

header img {
    height: 60px;
    margin: 10px 0 -25px;
}

.content {
    background-color: rgba(90, 100, 85, 0.8);
    color: #fff;
    left: 0;
    margin: auto;
    max-width: 700px;
    padding: 20px;
    position: fixed;
    right: 0;
    text-align: center;
    top: 50%;
    transform: translateY(-50%);
}

h1 {
    margin: 0 0 20px;
    font-size: 40px;
    font-weight: 700;
}

p {
    margin: 0 0 20px;
    font-size: 20px;
    font-weight: 400;
    line-height: 1.2;
}

.text-link {
    background-color: #fff;
    box-shadow: 0 1px 2px #bbb;
    color: rgb(90,100,85);
    display: inline-block;
    font-size: 20px;
    font-weight: 500;
    line-height: 1;
    padding: 0.5em;
    text-align: center;
    text-decoration: none;
}

.mobile-app-link {
    display: inline-block;
}

.mobile-app-link img {
    display: block;
}

@media (max-width: 767px) {
    header img {
        height: 50px;
        margin: 10px 0 -20px;
    }

    .content {
        max-width: 320px;
    }

    h1 {
        font-size: 32px;
    }

    p {
        font-size: 16px;
    }

    .text-link {
        font-size: 16px;
    }
}