:root {
  --bg: #f8f8f8;
  --text: #222;
  --accent: #4444aa;
}

body {
  font-family: "Inter", "Helvetica Neue", sans-serif;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

header, nav {
  background: white;
  padding: 1em 2em;
  border-bottom: 1px solid #ddd;
  text-align: center;
}



nav a {
  text-decoration: none;
  color: #333;
  margin-right: 1.2em;
  padding-bottom: 0.2em;
  transition: color 0.3s;
}

nav a:hover {
  color: #007acc; /* hover color */
}

nav a.active {
  color: green; /* active link color */
  border-bottom: 2px solid green;
  font-weight: 600;
}



main {
  max-width: 800px;
  margin: 2em auto;
  padding: 0 1em;
}

h1, h2 {
  font-weight: 600;
}

.annotation {
  color: #666;
  font-size: 0.9em;
  margin-bottom: 1em;
}