body {
  background: #1a75cf url(background.jpg) no-repeat center center fixed;
  background-size: cover;
  font-family: "Tahoma", sans-serif;
  color: #222;
}

.window {
  width: 800px;
  margin: 40px auto;
  border: 2px solid #666;
  box-shadow: 5px 5px 0px #000;
  background: #fff;
}

.titlebar {
  background: linear-gradient(#c0d8f0, #7fa8d9);
  color: #000;
  padding: 8px;
  font-weight: bold;
}

.content {
  display: flex;
}

.sidebar {
  width: 250px;
  padding: 15px;
  background: #f0f0f0;
  border-right: 2px solid #ccc;
}

.sidebar .pfp {
  width: 100%;
  border: 2px solid #000;
}

.sidebar ul {
  list-style: none;
  padding: 0;
}

.sidebar ul li {
  margin: 5px 0;
}

.sidebar ul li a {
  text-decoration: none;
  color: #0055cc;
}

.main {
  flex: 1;
  padding: 15px;
}

button {
  background: #d6eaff;
  border: 1px solid #000;
  margin: 5px 0;
  padding: 5px 10px;
  cursor: pointer;
}