body {
  margin: 0;
  font-family: Arial, sans-serif;
  background-color: #121212;
  color: #f0f0f0;
}

header, footer {
  padding: 1em;
  background: #1f1f1f;
  text-align: center;
}

nav {
  background: #222;
  padding: 0.5em;
  text-align: center;
}

nav a {
  color: #ffa447;
  margin: 0 1em;
  text-decoration: none;
}

h1, h2, h3 {
  color: #ffa447;
}

section {
  margin: 2em;
}

ul {
  list-style-type: square;
}

input, textarea, button {
  display: block;
  width: 100%;
  margin-top: 0.5em;
  padding: 0.75em;
  border: none;
  border-radius: 4px;
}

input, textarea {
  background: #2a2a2a;
  color: #f0f0f0;
}

button {
  background: #ffa447;
  color: #121212;
  font-weight: bold;
  cursor: pointer;
  margin-top: 1em;
}

.leader {
  display: flex;
  align-items: center;
  margin: 2em 0;
}

.avatar {
  width: 80px;
  height: 80px;
  background: url('https://upload.wikimedia.org/wikipedia/commons/6/6b/User-silhouette.svg') no-repeat center;
  background-size: cover;
  margin-right: 1em;
  filter: brightness(0) invert(1);
}