*{
  font-family: verdana;
  font-size: 20px;
}

body {
  margin: 0;
}

#background {
  background-image: url(/image/background.png);
  height: 100vh;
  width: 100%;
  background-size: cover;
  background-position: center center;
  position: fixed;
  top: 0;
  z-index: -1;
  filter: blur(10px);
}

.navbar ul{
  list-style-type: none;
  background-color: hsl(0, 0%, 25%);
  margin: 0;
  padding: 0;
  overflow: hidden;
}

.navbar a {
  color: white;
  text-decoration: none;
  padding: 14px 20px;
  display:block;
  text-align: center;
}

.navbar a:hover {
  background-color: #dddddd21;
  color: rgb(255, 255, 255);
}

.navbar li{
  float: left;
}

.flex-container1 {
  display: flex;
  align-items: stretch;

}

.flex-container1 > div {

  color: blue;
  margin: 0px;
  text-align: left;

}

.flex-container2 {
  display: flex;

}

.flex-container2 > div {

  color: blue;
  margin: 0px;
  text-align: left;

}

.flex-container3 {
  display: flex;
  align-items: stretch;

}

.flex-container3 > div {

  color: blue;
  margin: 0px;
  text-align: left;

}