/* Style body by adding background image and set it to cover, add font-family: */
/* https://images.pexels.com/photos/8952/night-trees-milky-way-stars.jpg?auto=compress&cs=tinysrgb&dpr=2&h=650&w=940 */
body {
/*    background: url(images/night-trees-milky-way-stars.jpg);*/
    background: url(https://images.pexels.com/photos/8952/night-trees-milky-way-stars.jpg?auto=compress&cs=tinysrgb&dpr=2&h=650&w=940);
    background-position: center center;
    background-size: cover;
    background-repeat: no-repeat;
    background-attachment: fixed;
    font-family: serif;
}
/* Style brand: */
/* Style navigation bar: */
nav {
    background-color: rgba(0, 0, 0, 0.5);
}
.logo {
    height: 30px;
    width: 40px;
    margin-right: 15px;
}
nav li {
    margin-right: 60px;
    padding: 1px 0;
}
nav a {
    color: grey;
    font-weight: bold;
    font-size: 18px;
}
nav li:hover {
    color: #ccc;
    border-bottom: 1px solid #00ff99;
    padding: 0;
}
/* Style jumbotron: ???  I did not use it...*/
/* Style icon section using bootstrap grid system: */
.container {
/*  padding-top and padding-bottom: */
    padding: 40px 0px;
    text-align: center;
    color: #ccc;
    font-weight: bold;
    max-width: 1000px;
}
h1 {
    font-size: 69px;
    letter-spacing: 4px;
}
/* Limit the width of the icon section: */
.container img {
    height: 100px;
    width: 100px;
}
.container h2 {
    padding-top: 20px;
}
.container p {
    padding: 0px 10px;
    padding-top: 10px;
}
/* Style contact button: */
.btn-default {
    background-color: rgba(0, 255, 153, 0.5);
    color: whitesmoke;
    font-weight: bold;
    width: 250px;
    border-radius: 10px;
    margin: 15px 0 100px; 
}
.btn-default:hover {
    background-color: rgba(0, 0, 0, 0.5);
    color: #ccc;
    text-align: center;
}
/* Style footer: */
footer {
    background-color: rgba(0, 0, 0, 0.5);
    color: grey;
    padding: 15px;
    text-indent: 100px;
}
/* Use  media queries to change icon size in small devices: */
@media (min-width: 480px) and (max-width: 768px) {
    .logo {
        height: 25px;
        width: 35px;
        margin-right: 0px;
    }
    nav li {
        text-align: center;
    }
    nav a {
        font-size: 16px;
    }
    .container {
/*      padding-top and padding-bottom */
        padding: 30px 0px;
    }
    h1 {
        font-size: 55px;
        letter-spacing: 0px;
    }
    .container img {
        height: 80px;
        width: 80px;
    }
    .container h2 {
        padding-top: 15px;
    }
    .container p {
        padding-top: 6px;
    }
    .btn-default {
        width: 200px;
        border-radius: 8px;
        margin: 10px 0 60px;
    }
    footer {
        padding: 15px;
        text-indent: 0px;
        text-align: center;
    }
}
@media (max-width: 480px) {
    .logo {
        height: 20px;
        width: 30px;
        margin-right: 0px;
    }
    nav li {
        text-align: center;
    }
    nav a {
        font-size: 12px;
    }
    .container {
        padding: 20px 0px;
    }
    h1 {
        font-size: 40px;
        letter-spacing: 0px;
    }
    .container img {
        height: 60px;
        width: 60px;
    }
    .container h2 {
        padding-top: 10px;
    }
    .container p {
        padding: 0px 20px;
        padding-top: 4px;
    }
    .btn-default {
        width: 150px;
        border-radius: 6px;
        margin-top: 8px;
        margin: 8px 0 30px;
    }
    footer {
        padding: 10px;
        text-indent: 0px;
        text-align: center;
    }
}