/* Basic starter styles */
:root{
  --bg:#464646;
  --fg:#222;
  --accent:#40c934;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:Segoe UI, Roboto, Arial, sans-serif;
  background:var(--bg);
  color:var(--fg);
  line-height:1.4;
  padding:1rem;
}

/* Decorative divider utility (presentational) */
.divider{
  height:10px;
  background:var(--accent);
  margin:1rem 0;
}
header nav{margin-bottom:1rem}

/* Navigation link styling: remove default link color, add hover/focus styles */
header nav a{
  color:var(--accent);
  text-decoration:none;
  padding:.25rem .5rem;
  border-radius:6px;
  display:inline-block;
  transition: background .15s ease, color .15s ease;
}
header nav a:hover, header nav a:focus{
  background: #40c934;
  color:#ffffff;
  text-decoration:none;
}
header nav a:focus{
  outline: none;
  box-shadow: 0 0 0 3px #ffffff;
}
header nav a.active{
  background:var(--accent);
  color:#fff;
}
main{max-width:800px;margin:0 auto;background:#c0c0c0;padding:1.5rem;border-radius:6px;box-shadow:0 1px 4px rgba(0,0,0,.06)}
img{display:block}
footer{margin-top:1rem;text-align:center;color:#ffffff;font-size:.9rem}