body {
  background-color: #c7e1ff;
}

h1 {
  color: #000000;
  text-align: center;
  font-family: verdana;
  font-size: 40px;
}

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

ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: #ff0000; 
}

li {
  float: left;
}

li a {
  display: block;
  color: #ffffff;
  text-align: center;
  padding: 20px 46px;
  text-decoration: none;
  font-family: verdana;
  font-size: 20px;
}
* {
  box-sizing: border-box;
}

.column1 {
  float: left;
  width: 33%;
  padding: 10px;
  background-color: #123456; 
}

.column2 {
  float: left;
  width: 33%;
  padding: 10px;
  background-color: #ffffff; 
}


.column3 {
  float: left;
  width: 33%;
  padding: 10px;
  background-color: #123456; 
}
.row:after {
  content: "";
  display: table;
  clear: both;