html {
background-color: white;
color: black;
}

body {
font-family: Helvetica;
color: black;}

header {
background: white; 
color: black;
}

nav ul {
display: inline-block
float: right;
padding: 60px;
margin: 0;

}

nav li {
  display: inline-block;
  color: black;
  float: right;
  padding: 20px;
  margin: 0;
}


.center {
    margin: auto;
    width: 30%;
    padding: 30px;
    float: center;
}

   
}

a h1 h3 p hr {
color: black;
}


a:link {
color:black;
}

a:active{
color:black;
}

a:visited {
color:black;
}

a:hover {
color:black;
}





html {
background-color: white;
color: black;
}

body {
font-family: Helvetica;
color: black;}

header {
background: white; 
color: black;
}

nav ul {
display: inline-block
float: right;
padding: 60px;
margin: 0;

}

nav li {
  display: inline-block;
  color: black;
  float: right;
  padding: 20px;
  margin: 0;
}


.center {
    margin: auto;
    width: 30%;
    padding: 30px;
    float: center;
}

   
}

a h1 h3 p hr {
color: black;
}

hr {
  width:60%;
}

a:link {
color:black;
}

a:active{
color:black;
}

a:visited {
color:black;
}

a:hover {
color:black;
}





Increase thickness of hr bar
Increase thickness of hr bar
