.practice {
    padding: 20px;
    margin: 20px 0;
    border: 1px solid #eee;
    border-left-width: 5px;
    border-radius: 3px;
    border-left-color: #2ca9e1;
}

.practice p:last-child {
    margin-bottom: 0;
}
.practice code {
    border-radius: 3px;
}
.practice+.practice {
    margin-top: -5px;
}
.practice-checkpoint{
    border-left-color:#ec6d71;
}

.practice-checkpoint h3 {
    color: #ec6d71;
}

.contents strong{
    color: #ec6d71;
}
.contents h4{
  font-style: italic;
  text-underline-position: below;
  text-decoration:underline;
  
}