:root {
  --bg-color-light: #ffffff;
  --text-color-light: #000000;
  --bg-color-dark: #121212;
  --text-color-dark: #ffffff;
}

/* Layout: column with footer at bottom */
html, body { height: 100%; }
body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  margin: 0;
  font-family: Arial, sans-serif;
  background-color: var(--bg-color-light);
  color: var(--text-color-light);
  transition: background-color 0.3s, color 0.3s;
}

main.site-main {
  flex: 1 0 auto;
  padding: 2rem;
}

/* Centered content for index page only */
.centered-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

@media (prefers-color-scheme: dark) {
  body {
    background-color: var(--bg-color-dark);
    color: var(--text-color-dark);
  }
}

/* Footer */
.site-footer {
  padding: 1rem;
  background: rgba(0,0,0,0.03);
  text-align: center;
  font-size: 0.95rem;
}
@media (prefers-color-scheme: dark) {
  .site-footer { background: rgba(255,255,255,0.03); }
}
.site-footer .footer-inner { max-width: 1000px; margin: 0 auto; }
.site-footer .contact-line { margin: 0; display: inline-block; }
.site-footer a { color: inherit; text-decoration: underline; }