BEMup.css

a: hover {
  color: rgba(255, 0, 255, .6);
}

header {
  display: flex;
  justify-content: space-between;
  background: #eda;
}

header a,
header span,
{}

header ul {
  margin-top: 43px;
  margin-left: -8px;
}

header li {
  display: inline-block;
  margin-right: 16px;
}

header img {
  width: 30%;
}

header input[type=submit],
header input[type=checkbox] {
  width: auto;
  margin-right: 20px;
}

header input[type=checkbox] {
  margin: 0;
}

#logo {
  margin-left: 20px;
}

#avatar {
  width: 150px;
  margin-top: 10px;
  margin-right: -50px;
}

#avatar img {
  border-radius: 50%;
}

main {
  overflow: hidden;
}

nav {
  width: 200px;
  margin-top: 50px;
  margin-left: 30px;
  float: left;
}

nav a {
  display: block;
}

h1 {
  font-weight: normal;
  font-size: 26px;
}

footer {
  margin-top: 40px;
  padding-top: 6px;
  border-top: 1px solid rgba(0, 0, 0, .3);
  font-size: 12px;
}