table,
th,
td {
  border: 1px solid;
}

table {
  width: 100%;
}

ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  background-color: #283645;
  overflow: hidden;
}
li {
  float: left;
}
li a {
  color: white;
  padding: 20px;
  text-decoration: none;
  display: block;
}

li a:hover {
  background-color: #1490d7;
}

h1 {
  color: #1490d7;
}

.gauche {
  float: left;
}
.clearB {
  clear: both;
}