body
{
font-family: Arial, sans-serif;
margin: 0;
padding: 0;
background-color: #f4f4f4;
}

header
{
background-color: #cc0000;
color: white;
padding: 20px;
text-align: center;
}

nav
{
background-color: #333;
}

nav ul
{
list-style: none;
margin: 0;
padding: 0;
display: flex;
justify-content: center;
}

nav li
{
margin: 0;
}

nav a
{
display: block;
padding: 12px 18px;
color: white;
text-decoration: none;
}

nav a:hover
{
background-color: #555;
}

main
{
padding: 20px;
}

section
{
margin-bottom: 30px;
}

article
{
background: white;
padding: 15px;
margin-bottom: 15px;
border-radius: 6px;
box-shadow: 0 0 5px rgba(0,0,0,0.1);
}

.profile
{
width: 200px;
border-radius: 10px;
margin-bottom: 10px;
}

aside
{
background: #eeeeee;
padding: 15px;
margin: 20px;
border-radius: 6px;
}

footer
{
text-align: center;
padding: 15px;
background: #333;
color: white;
}