p, 
ul {
  border: 2px solid rebeccapurple;
  padding: .5em;
}

.block,
li {
  border: 2px solid blue;
  padding: .5em;
}

ul {
  display: inline-flex;
  list-style: none;
}

.block {
  display: block;
}

body{
  background-color: grey;
  color: wheat;
}

.button{
  display: inline;
  border: 0px;
  background-color: rgb(156, 190, 190);
  color: rgb(12, 22, 55);
  font-size: 16px;
  width: 10%;
  height: 20%;
  margin-left: 45%;
  margin-right: 45%;
}

.button:hover{
  background-color: darkred;
  font-size: 13px;
}

.centerposition{
  width: 45%;
}

dd, dt {
  line-height: 1.5;
}

dt {
  font-weight: bold;
}

.html {
  font-family: Helvetica, Arial, sans-serif;
  font-size: 10px;
}

.h2 {
  font-size: 2rem;
  border: none;
}

.ul,.ol,.dl,.p {
  font-size: 1.5rem;
  border: none;
}

.li, .p {
  line-height: 1.5;
  border: none;
}