body {
 font-family: sans-serif;
 color: #333333;
}

div.alert-success {
  background-color: lightgreen;
}
div.alert-info {
  background-color: lightblue;
}
div.alert-warning {
  background-color: khaki;
}
div.alert-danger {
  background-color: lightsalmon;
}
div.alert {

  font-size: 100%;
  padding-top: 1px;
  padding-bottom: 1px;
  padding-left: 5px;
  padding-right: 5px;
  margin-top: 10px;
  border-radius: 10px;
}

h1 {
  background-color: red;
}

h2 {
  background-color: red;
}

h3 {
  background-color: red;
}