body { font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif; line-height: 1.6; margin: 24px; color: #222; }
h1 { font-size: 28px; margin: 0 0 12px; }
h2 { font-size: 22px; margin-top: 28px; border-top: 1px solid #eee; padding-top: 16px; }
h3 { font-size: 18px; margin-top: 20px; }
ul { margin: 8px 0 16px 20px; }
li { margin: 6px 0; }
code { background: #f5f5f5; padding: 0 4px; border-radius: 4px; }
nav { margin-bottom: 20px; }
nav a { margin-right: 10px; text-decoration: none; color: #3366cc; }
nav a:hover { text-decoration: underline; }
.warning { background: #fff8e1; border: 1px solid #ffe0b2; padding: 10px 12px; border-radius: 6px; color: #4e342e; }
.info { background: #f0f7ff; border: 1px solid #cfe5ff; padding: 10px 12px; border-radius: 6px; }
.video { margin: 20px 0; text-align: center; }
.video iframe { max-width: 100%; border-radius: 12px; }