body {font-family: Arial, sans-serif; line-height: 1.7; margin: 20px; color: #222;}
h1, h2, h3 {color: #004b7f;}
img {max-width: 100%; margin: 20px 0;}
a {color: #0a5;}
.toc a {text-decoration: none; color: #0066cc;}
.toc a:hover {text-decoration: underline;}