html, body {
    width: 100vw;
    height: 100vh;
    margin:0;
    padding:0;
}

body {
    background-image: url("images/background.jpg");
    background-position: center;
    background-size: cover;
    background-attachment: fixed;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    text-decoration: none;
    font-family: Arial, Helvetica, sans-serif;
}

h1 {
    text-align: center;
}

a, h2, a:visited, a:hover {
    color: black;
    text-decoration: none;
}

div {
    background-color: rgba(0, 0, 0, 0.7);
    color:white;
    border-radius: 5px;
    width: 70vw;
    margin: auto;
}

section {
    background-color: rgba(255, 255, 255, 0.7);
    padding: 4px;
    color: black;
    border-radius: 5px;
    width: 50vw;
    margin: auto;
    margin-top: 16px;
    margin-bottom: 16px;
}

section:hover {
    background-color: rgba(218, 218, 218, 0.7);
}

section:active {
    background-color: rgba(134, 134, 134, 0.9);
}