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

#wrapper {
  width: 750px;
  margin: 0;
  border: 1px solid #000;
}

header {
  background: #cc3333;
}

header img {
  display: block;
  padding: 18px 0 12px 0;
  margin: 0 auto;
}

nav {
  background: #0000cc;
}

nav ul {
  margin: 0;
  padding: 0;
  list-style: none;
  overflow: hidden;
}

nav li {
  float: left;
  width: 150px;
  text-align: center;
}

nav a {
  display: block;
  color: #ffffff;
  text-decoration: none;
  font-weight: bold;
  padding: 8px 0;
}

nav a:hover {
  background: #000099;
}

#content {
  display: flex;
  background: #ffffff;
}

main {
  flex: 1;
  padding: 14px 16px;
  box-sizing: border-box;
}

main h1 {
  margin: 0 0 10px 0;
  font-size: 22px;
}

main p {
  margin: 0 0 12px 0;
  line-height: 1.35;
  font-size: 14px;
}

main ul {
  margin: 0 0 12px 22px;
  padding: 0;
  font-size: 14px;
}

aside {
  width: 200px;
  background: #ffffcc;
  padding: 12px;
  box-sizing: border-box;
  text-align: center;
}

aside h2 {
  margin: 0 0 10px 0;
  font-size: 16px;
}

aside img {
  display: block;
  margin: 0 auto 10px auto;
  border: 1px solid #000;
  max-width: 100%;
  height: auto;
}

.aside_link {
  margin: 0 0 10px 0;
  font-size: 14px;
}

.aside_details {
  margin: 0;
  font-size: 13px;
  line-height: 1.4;
}

footer {
  background: #0000cc;
  color: #ffffff;
  text-align: center;
  padding: 10px 0;
  font-size: 13px;
  clear: both;
}