:root {
  --bg: #ffffff;
  --text: #212529;
  --link: #0066cc;
  --code-bg: #f4f4f6;
  --border: #e0e0e0;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121212;
    --text: #e0e0e0;
    --link: #66b2ff;
    --code-bg: #1e1e1e;
    --border: #333333;
  }
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background-color: var(--bg);
  max-width: 800px;
  margin: 2rem auto;
  padding: 0 1rem;
}

a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }

pre, code { 
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace; 
  background: var(--code-bg); 
  padding: 0.2em 0.4em; 
  border-radius: 4px; 
}
pre code { padding: 0; }
pre { padding: 1em; overflow-x: auto; }

blockquote { 
  border-left: 4px solid var(--border); 
  margin: 0; 
  padding-left: 1rem; 
  color: #666; 
}

img { max-width: 100%; height: auto; }

table { width: 100%; border-collapse: collapse; margin: 1em 0; }
th, td { border: 1px solid var(--border); padding: 0.5em 0.75em; text-align: left; }

/* Header styling */
.site-header {
  border-bottom: 1px solid var(--border);
  padding-bottom: 1rem;
  margin-bottom: 2rem;
}
.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.site-title { font-weight: bold; font-size: 1.1rem; }

/* Back to Top button styling */
.site-footer {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  text-align: center;
}
#back-to-top {
  background: var(--code-bg);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 0.5rem 1rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.9rem;
}
#back-to-top:hover {
  background: var(--border);
}