main {
  background: #52b788; /* fresh green */
  color: #2b3a2a; /* dark bark brown-green */ 
}

body {
  background: olive url("images/tree-bark.png"); /* pale leafy green background */
}

header {
  background: #4b3f2f; /* tree bark brown */
  color: #d9ed92; /* soft leaf green */
  border-bottom: 2px solid #52b788; /* lively green accent */
  box-shadow: inset -2px -2px #52b788, inset 2px 2px #2d3a2f;
}

nav a {
  color: #d9ed92; /* pale green text */
  background-color: #6a994e; /* leaf green buttons */
}

nav a:hover {
  background-color: #d9ed92; /* light green hover */
  color: #2b3a2a;
}

h1, h2, h3 {
  background-color: #d9ed92;
  color: #2b3a2a; /* bark brown text */
}