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

header {
  background: #009900;
  color: white;
  padding: 10px;
}

nav {
  background: #66cc66;
  padding: 5px;
}

nav a {
  margin-right: 10px;
  color: blue;
  text-decoration: underline;
}

.container {
  padding: 15px;
}

.box {
  background: #fff;
  border: 2px solid #000;
  padding: 10px;
  margin-bottom: 10px;
}

input, textarea {
  width: 100%;
  margin-bottom: 10px;
}

button {
  background: #e0e0e0;
  border: 2px outset #fff;
  padding: 5px;
}