/* BODY + GIF BACKGROUND */
body {
    margin: 0;
    font-family: Arial, sans-serif;
    color: white;

    background-image: url("images/back.gif");
    
    background-repeat: no-repeat;
    background-position: center;
}


/* DARK OVERLAY FOR READABILITY */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;

    background-color: rgba(0, 0, 0, 0.6);

    z-index: -1;
}

/* HEADER */
header {
    text-align: center;
    padding: 30px;
    background-color: #222222;
}

/* NAV (STICKY REQUIRED) */
nav {
    position: sticky;
    top: 0;
    background-color: #000000;
}

nav ul {
    list-style-type: none;
    margin: 0;
    padding: 10px;
    text-align: center;
}

nav ul li {
    display: inline;
    margin: 10px;
}

nav ul li a {
    color: white;
    text-decoration: none;
    padding: 8px 12px;
}

/* HOVER EFFECT */
nav ul li a:hover {
    background-color: #00ccaa;
    color: black;
}

/* MAIN */
main {
    padding: 20px;
}

/* HERO */
.hero {
    text-align: center;
    margin-bottom: 20px;
}

.hero img {
    width: 250px;
}

/* CARDS */
.card {
    display: inline-block;
    width: 250px;
    margin: 15px;
    padding: 15px;
    background-color: #1c1c1c;
    border: 1px solid #333;
    text-align: center;
}

/* CARD IMAGE */
.card img {
    width: 80px;
    margin-top: 10px;
}

/* BUTTON */
.button {
    display: inline-block;
    margin-top: 10px;
    padding: 8px 12px;
    background-color: #00ccaa;
    color: black;
    text-decoration: none;
}

/* BUTTON HOVER */
.button:hover {
    background-color: white;
}

/* FOOTER */
footer {
    text-align: center;
    padding: 20px;
    background-color: #222222;
}

/* REQUIRED ONLY MEDIA QUERY */
@media (max-width: 768px) {

    nav ul li {
        display: block;
        margin: 5px 0;
    }

    .card {
        width: 90%;
    }

    .hero img {
        width: 100%;
    }
}