body{
  background-color: ;
  width:100%;
  font-family: Roboto Mono;
  font-size: 18px;
}

.back{
  margin:20px;
}

.intro{
  margin:40px;
  max-width: 60%;
}

.page_title{
  font-size:50px;
  color: red;
}


.intro_text{
  margin-top:15px;
}

.sec_title{
  font-size:30px;
}


.week_01{
  margin:40px;
 padding: 40px;
  border-style:dotted none dotted none;
  border-width:2px;
  border-color: blue;
  margin-top:30px;
  max-width:70%;
}

.audio{
  margin-top:40px;
  color:pink;
}

.contributors{
  margin:40px;
}

.contributors_names{
 color:blue;
 margin-top: 15px;
}

a{
  color:blue;
  text-decoration: none;
}

a:hover{
  text-decoration: underline;
}