Style.css

body {
    font-family: Helvetica;
    background: #DCDCDC;
    margin: 0em;
    padding: 0em;
    font-size: 100%;
}

    /* Name der Zeitung */

h1 {
    Font-size: 2.5em;
    font-family: helvetica, sans-serif;
    line-height: 3.2em;
    Font-Weight: 100;
    color: #E2DBDB;
    margin: 0em;
}

    /* Artikel-Überschrift */

h2 {
    Font-size: 1.563em;
    font-family: helvetica, sans-serif;
    line-height: 1,8em;
    Font-Weight: 100;
    color: #2F2D2C;
    margin: 0em;
    padding: 1.25em;
    text-align: left;
}

    /* Artikeltext */

 p {
    font-family: helvetica, sans-serif;
    line-height: 1.25em;
    Font-Weight: 100;
    color: #2F2D2C;
    margin: 0em;
    padding: 1.25em;
    text-align: justify;
}

    /* Boxen für die Sidebar */

 ul {
    margin: 0px;
    padding: 0em;
}

li {
    list-style: square;
    Font-Weight: 100;
    color: #2F2D2C;
    line-height: 1.25em;
    margin: 0em;
    padding: 0em;
    margin: 0.313em 0em 0.313em 0em;
}

    /* Artikelbild */

img {
    width: 90%;
    height: auto;
    max-width: 100%;
}

a {
    text-decoration: none;
}

/* Topbar */

#menubar {
    Display:block;
    background: #FFFFFF;
}

#menubar ul {
    display: block;
    width: 2em;
    padding: 0.9em;
}

#menubar ul li {
    display: inline;
}

#menubar ul li a.menubutton {
    display: none;
}

/* header */

header {
    display: block;
    background: #2F2D2C;
    text-align: center;
}

nav {
    display: block;
    height: 2.5em;
    text-align: center;
    background-color: #FFFFFF;
}

nav ul {
    display: block;
}

nav ul li {
    display: inline;
    margin: 0em 0.788em 0em 0.788em;
}

nav ul li a {
    color: #454040;
    font-size: 1,125em;
    line-height: 2.5em;
    padding: 0.563em 0.938em 0.375em 0,983em;
    transition: ease-in-out all 100ms;
}

nav ul li a:hover {
    background: DBD9D8;
    border-bottom: 0.188em solid #E7590B;
}

nav ul li a.active {
    border-bottom: 0,188em solid #E7590B;
}

/* Main Content */

#main {
    display: block;
    width: 96%;
    max-width: 980px;
    margin: 1.25em auto;
    padding: 0em;
}

#main article {
    display: inline-block;
    width: 65.3%;
    background: #FFFFFF;
    vertical-align: top;
    margin: 0em;
    padding: 0em;
    text-align: center;
}

#main article img {
    max-width: 560px;
    border-radius: 5px;
}

#main aside {
    display: inline-block;
    width: 30.6%;
    margin-left: 3%;
    padding: 0em;
    vertical-align: top;
}

#main aside section {
    margin-bottom: 1.563em;
    background: #FFFFFF;
    border-bottom: 0.188em solid #E7590B;
}

#main aside section ul {
    padding: 0em 1.875em 1.25em 2.5em;
}

/* Login */

.login_container {
    height: 18em;
    width: 35em;
    text-align: center;
    margin: 0 auto;
    border: solid 0.063em grey;
    border-radius: 5px;
    box-sizing: border-box;
}

.login_container h1 {
    margin: 0px;
}

input[type="text"],input[type="password"] {
    width: 19.5em;
    height: 1.8em;
    border-radius: 1px;
    border: solid 1px black;
    margin: 3px;
    padding-left: 3.5px;
}


.btn-anmelden {
    color: white;
    background-color: black;
    height: 2.1em;
    width: 10em;
    font-family: Helvetica;
    letter-spacing: 1.2px;
    border: solid 1.5px black;
    margin-top: 30px;
    box-sizing: border-box;
    transition: ease-in-out all 300ms;
}

.btn-anmelden:hover {
    color: black;
    background-color: White;
}

/* Footer */

footer {
    display: block;
    background: #2F2C2C;
    text-align: Center;
    margin-bottom: 0px;
    bottom: 0px;
}

footer ul {
    display: block;
    width: 100%;
    max-width: 980px;
    text-align: left;
    margin: 0px auto;
}

footer ul li {
    display: inline;
    font-size: 0.8em;
    line-height: 2.8em;
    color: #E2DBDB;
    padding: 0em 0.625em 0em 0.625em;
}

footer ul li a {
    color: #E2DBDB;
}

/* mobile Ansicht */

@media screen and (min-width:550px) {
    nav.nav {
        display: block !important;
    }
}

@media screen and (max-width:800px) {
    body {
        font-size: 90%;
    }
}

@media screen and (max-width:600px) {
    #main aside, #main article {
        width: 100%;
        display: block;
        margin: 0.625em 0em 0.625em 0em;
    }
    .login_container {
        width: auto;
    }
}

@media screen and (max-width:550px) {
    #menubar ul li a.menubutton {
        display: block;
    }
    nav {
        display: none;
        height: auto;
    }
    nav ul li {
        display: block;
        margin: 0.3em 0em 0.3em 0em;
    }
    body {
        font-size: 86%;
    }

    footer {
        display: none;
    }
}