*{
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

main{
  width: 50%;
  background-color: #cccccc;
  margin: 0px auto;
  display: flex;
  flex-direction: column;
  gap: 5px;
}
 
main div{
  background-color: #4ea958;
  height: 100px;
  border: 1px solid black;
  width: 100%;
}
#small{
  font-size: 10px;
}
.bold{
  font-weight: bold;
}
.italic p{
  font-style: italic;
  color: black
}
.big{
  font-size: 20px;
  text-decoration: none;
}
.big.bold{
  text-decoration: underline;
}
main div p
{
    color: white;
}
#small
{
  font-weight: normal;
}
body main div
{
background-color: lightblue;
}