html {
    background: #d6d6d6;
    background-image: -webkit-url('images/trautner_background_piles.png'), radial-gradient(circle farthest-corner at 50% 50%, #d6d6d6, #a8a8a9);
    background-image: -o-url('images/trautner_background_piles.png'), radial-gradient(circle farthest-corner at 50% 50%, #d6d6d6, #a8a8a9);
    background-image: -moz-url('images/trautner_background_piles.png'), radial-gradient(circle farthest-corner at 50% 50%, #d6d6d6, #a8a8a9);
    background-image: url('images/trautner_background_piles.png'), radial-gradient(circle farthest-corner at 50% 50%, #d6d6d6, #a8a8a9);
    background-repeat: repeat-y;
    background-position: center;
    background-size: 90vw, cover;
    color: white;
    text-align: center;
}

h1 {
    font-family: Arial, sans-serif;
    font-size: 2.5em;
    color: #cd090a;
}

h2 {
    font-family: Arial, sans-serif;
    font-size: 1.2em;
    color: #cd090a;
}

h3 {
    font-family: Arial, sans-serif;
    color: #4b4b4b;
    font-size: 1em;
}

p {
    margin-left: 10%;
    margin-right: 10%;
    margin-top: 50px;
    font-family: Arial, sans-serif;
    color: #4b4b4b;
    text-align: justify;
}

ul {
    margin: 0 auto;
    margin-top: 2em;
    margin-bottom: 2em;
    font-family: Arial, sans-serif;
    color: #4b4b4b;
    text-align: left;
    width: 40%;
}

li {
    margin-bottom: 1em;
}

a {
    text-decoration: none;
}

a:link {
    color: #cd090a;
}

a:visited {
    color: #cd090a;
}

a:hover {
    color: #ff6e6e;
}

a:active {
    color: #cd090a;
}

.topnav {
    font-size: 1.2em;
    font-weight: bold;
    font-family: Arial, sans-serif;
    text-align: left;
    margin-bottom: 10px;

}

.topnav a {
    padding-bottom: 5px;
}

.topnav .icon {
    display: none;
}

@media screen and (max-width: 768px) {

h1 {
    font-size: 1.5em;
}

h2 {
    font-size: 1em;
    margin-left: 5%;
    margin-right: 5%;
}
h3 {
    margin-left: 5%;
    margin-right: 5%;
}

ul {
    width: 70%;
}

  #PictureSection {
      margin: 0 auto;
      height: 600vw;
  }
    .topnav a:not(:first-child) {
        display: none;
    }
    .topnav a.icon {
        float: right;
        display: block;
    }

    .topnav i {
      font-size: 1.25em;
    }
    .topnav {
        font-size: 2em;
        margin-left: 10%;
        margin-right: 10%;
        overflow: hidden;
    }
    .topnav.responsive {
        position: relative;
    }
    .topnav.responsive a.icon {
        position: absolute;
        right: 0;
        top: 0;
    }
    .topnav.responsive a {
        float: none;
        display: block;
        text-align: left;
    }
}

#header {
    margin: 0 auto;
    margin-top: 50px;
    margin-bottom: 50px;
}

#header img {
    width: 80vw;
}

#section_divider {
    width: 90vw;
}

#gallery {
    text-align: center;
    margin: 0 auto;
    margin-bottom: 15px;
}

#gallery img {
    width: 65vw;
    margin-bottom: 15px;
}

@media only screen and (min-width: 768px) {
    .topnav {
        font-size: 1.2em;
        font-weight: bold;
        font-family: Arial, sans-serif;
        text-align: right;
        margin-right: 20%;
        margin-top: 50px;
        margin-bottom: 5px;
    }
    .topnav a {
        padding: 7px;
    }
    #header {
        margin-top: 100px;
        margin-bottom: 125px;
    }
    #header img {
        width: 45vw;
    }
    #section_divider {
        width: 65.5vw;
    }
    html {
        background-size: 65.5vw, cover;
    }
    p {
        margin-left: 27%;
        margin-right: 27%;
    }


    #PictureSection {
        margin: 0 auto;
        height: 55vw;
    }
    #gallery {
        text-align: center;
        width: 60vw;
    }
    #gallery img {
        width: 17vw;
        -webkit-transition-duration: 0.6s;
        /*Webkit: animation duration*/
        -moz-transition-duration: 0.6s;
        /*Mozilla: animation duration*/
        -o-transition-duration: 0.6s;
        /*Opera: animation duration*/
        transition-duration: 0.6s;
        opacity: 1;
        /*initial opacity of the image*/
        z-index: 1;
        /*place non-hover images behind the hover image*/
        margin: 5px;
        /*remove default margin for images*/
        position: relative;
        /*solve the problem with z-index in Chrome*/
    }
    #gallery img:hover {
        -webkit-transform: scale( 2);
        /*Webkit: increase size to 1.5x*/
        -moz-transform: scale( 2);
        /*Mozilla: scaling*/
        -o-transform: scale( 2);
        /*Opera: scaling*/
        transform: scale( 2);
        box-shadow: 0px 0px 25px gray;
        /*CSS3 shadows: 25px fuzzy shadow around the entire image*/
        -webkit-box-shadow: 0px 0px 25px gray;
        /*Webkit: shadows*/
        -moz-box-shadow: 0px 0px 25px gray;
        /*Mozilla: shadows*/
        opacity: 1;
        /*default opacity*/
        z-index: 10;
        /*place hover image in front the non-hover images*/
    }


}

#WelcomeSection {
    margin: 0 auto;
    height: 500px;
}

#ServiceSection {
    margin: 0 auto;
    height: 500px;
}

#DatenschutzSection p {
    margin-top: 0px; 
}

#ImpressumSection p {
    margin-top: 0px; 
}

#ContactSection {
    margin: 0 auto;
    height: 500px;
}

#ContactSection p {
  text-align: center;
}

#myBtn i {
  font-size: 2em;
}

#myBtn {
    display: none;
    /* Hidden by default */
    position: fixed;
    /* Fixed/sticky position */
    bottom: 20px;
    /* Place the button at the bottom of the page */
    right: 30px;
    /* Place the button 30px from the right */
    z-index: 99;
    /* Make sure it does not overlap */
    border: none;
    /* Remove borders */
    outline: none;
    /* Remove outline */
    background-color: #cd090a;
    /* Set a background color */
    color: white;
    /* Text color */
    cursor: pointer;
    /* Add a mouse pointer on hover */
    padding: 15px;
    /* Some padding */
}

#myBtn:hover {
    background-color: #555;
    /* Add a dark-grey background on hover */
}

#Footer {
    text-align: center
}