html, body {
    margin: 0;
    padding: 0;
    font-family:'Segoe UI', Tahoma, Geneva, Verdana, sans-serif
}

.center {
    display: flex;
    align-items: center;
    margin: auto;
    max-width: 800px;
    text-align: center;
    flex-flow: column;
}

.logo {
    margin: auto;
    height: 120px;
    display: flex;
    align-items: center;
}

nav {
    width: 100%;
}

.navigation {
    list-style-type: none;
    margin: 0;
    padding: 0; 
    display: flex;
    flex-flow: row wrap; 
    background: #333;
    border-radius: 5px 5px 0 0;
    width: 100%;
}

.navigation li {
    margin: 0;
    padding: 0;
}

.navigation li a {
    text-decoration: none;
    display: block;
    padding: 5px 10px;
    font-size: 16px;
    color: #FFF;
    margin: 5px;
}

.content {
    width: 100%;
    min-height: 500px;
    box-shadow: 0 0 15px rgb(0 0 0 / 15%);
}

footer {
    width: 100%;
    background: #333;
    border-radius: 0 0 6px 6px;
    margin-bottom: 20px;
}

.footer-nav {
    list-style-type: none;
    padding: 0;
    margin: 0;
    box-shadow: inset 0 1px 0 #d2d7e1;
    display: flex;
    flex-flow: row wrap;
}

.footer-nav li a {
    display: block;
    text-decoration: none;
    color: #FFF;
    padding: 10px;
}

.page {
    display: none;
}