* {
    box-sizing: border-box;
}

html {
    height: 100%;
    width: 100%;
}

body {
    background-color: #FFF8BB;
    font-family: Arial;
    padding: 0;
    margin: 0;
}

header {
    background-image: url("background.jpg");
    background-position: center center;
    padding: 3em;
    color: #FFF;
}

h1 { 
    font-size: 40pt;
}

main {
    padding: 2em;
    padding-bottom: 4em;
}

nav ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    padding-left: 1em; 
    overflow: hidden;
    background-color: #333;
}

nav li {
    float: left;
}

.right {
	float: right;
	padding-right: 1em;
}

nav li a {
    display: block;
    color: white;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
}
nav li a:hover {
    background-color: #111;
}

#logo {
    width: 15em;
    margin-left: 5em;
    margin-top: 1.2em;
}

.col-1  { width: 8.33%;   }
.col-2  { width: 16.66%;  }
.col-3  { width: 25%;     }
.col-4  { width: 33.33%;  }
.col-5  { width: 41.66%;  }
.col-6  { width: 50%;     }
.col-7  { width: 58.33%;  }
.col-8  { width: 66.66%;  }
.col-9  { width: 75%;     }
.col-10 { width: 83.33%;  }
.col-11 { width: 91.66%;  }
.col-12 { width: 100%;    }

[class*="col-"] {
    float: left;
}

.row::after {
    content: "";
    clear: both;
    display: table;
}

@media only screen and (max-width: 768px) { /* Für Smartphones: */
    [class*="col-"] {
        width: 100%;
    }
    
    #logo {
        width: 8em;
        margin-left: 0;
        margin-top: 2em;
    }
}