body {
    margin: 0;
    padding: 0;
    font-family: 'Oswald', sans-serif;
    font-size: larger;
    background-color: #8cd7f8;
    background: 
    linear-gradient(
          rgba(0, 0, 0, 0.5), 
          rgba(0, 0, 0, 0.5)),
    url("../images/www-background.jpg");
    background-size: cover;
    background-attachment: fixed;
}
div.header {
    /* background: 
    linear-gradient(
          rgba(0, 0, 0, 0.5), 
          rgba(0, 0, 0, 0.5)),
    url("../images/www-background.jpg");
    background-size: cover; */
    color:white;
    margin: 0;
    padding: 0;
}
img.logo {
    max-width: 75px;
    max-height: 75px;
}
h1.title {
    padding: 2px;
    background-color: yellow;
    vertical-align: middle;
}
div.column-left {
    float: left;
    padding: 10px;
    vertical-align: middle;
  }
div.column-right {
    float: right;
    padding: 10px;
  }
div.row:after {
    content: "";
    display: table;
    clear: both;
  }
div.content {
    margin-left: auto;
    margin-right: auto;
    width: 80%;
}
div.copyright {
    text-align: center;
    font-size: 12px;
    background-color: #7db338;
    margin-left: auto;
    margin-right: auto;
    position: fixed;
    bottom: 0;
}
ul.nav_bar {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
}
li.nav_bar {
    float: right;
}
li.nav_bar a {
    display: block;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
    border-radius: 10px;
    margin-bottom: 10px;
    color: white;
}
li.nav_bar a:hover {
    background-color: #7db338;
    color: #000;
}
div.contact {
    margin-left: auto;
    margin-right: auto;
    width: 80%;
    min-height: 400px;
}

.flip-card {
  background-color: transparent;
  width: 300px;
  height: 300px;
  perspective: 1000px;
  border-radius: 10px;
}

.flip-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  text-align: center;
  transition: transform 0.6s;
  transform-style: preserve-3d;
  box-shadow: 0 4px 8px 0 rgba(0,0,0,0.2);
}

.flip-card:hover .flip-card-inner {
  transform: rotateY(180deg);
  border-radius: 10px;
}

.flip-card-front, .flip-card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  border-radius: 10px;
}

.flip-card-front {
  background-color: #bbb;
  color: black;
  border-radius: 10px;
}

.flip-card-back {
  background-color: #2980b9;
  color: white;
  transform: rotateY(180deg);
  border-radius: 10px;
}