body { font-family: Arial, sans-serif; margin: 0; padding: 0; line-height: 1.6; background: #f9f9f9; color: #333; }
header, footer { background: #003366; color: white; padding: 1em; text-align: center; }
nav { margin: 10px 0; }
nav a { color: white; margin: 0 10px; text-decoration: none; font-weight: bold; }
nav a:hover { text-decoration: underline; }
main { padding: 20px; max-width: 900px; margin: auto; background: white; }
h1, h2, h3 { color: #003366; }
a { color: #0066cc; text-decoration: none; }
a:hover { text-decoration: underline; }
button { background: #0066cc; color: white; padding: 10px 20px; border: none; border-radius: 4px; cursor: pointer; }
button:hover { background: #004999; }
.quiz-question { margin-bottom: 20px; }
.result { font-weight: bold; margin-top: 20px; }