:root {
  --bg: #ffffff;
  --text: #1a1a1a;
  --accent: #444444;
  --border: #dddddd;
}

body.dark {
  --bg: #121212;
  --text: #e6e6e6;
  --accent: #aaaaaa;
  --border: #333333;
}

* {
  box-sizing: border-box;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: Georgia, 'Times New Roman', serif;
  max-width: 700px;
  margin: 0 auto;
  padding: 40px 20px 80px;
  line-height: 1.6;
  transition: background-color 0.2s, color 0.2s;
}

#theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 36px;
  height: 36px;
  cursor: pointer;
  font-size: 16px;
}

header {
  text-align: center;
  margin-bottom: 20px;
}

header img {
  width: 140px;
  height: 140px;
  object-fit: cover;
  border-radius: 50%;
  margin-bottom: 16px;
}

header h1 {
  margin-bottom: 4px;
  font-size: 28px;
}

header p {
  color: var(--accent);
  margin-top: 0;
}

nav {
  text-align: center;
  margin-bottom: 40px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 10px 0;
}

nav a {
  color: var(--text);
  text-decoration: none;
  margin: 0 12px;
}

nav a:hover {
  text-decoration: underline;
}

section {
  margin-bottom: 36px;
}

h2 {
  font-size: 18px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 6px;
  margin-bottom: 14px;
}

a {
  color: var(--text);
}

ul {
  padding-left: 20px;
}

footer {
  text-align: center;
  color: var(--accent);
  font-size: 13px;
  margin-top: 60px;
}