body{margin:0;font:16px/1.6 system-ui,sans-serif;color:#1f1a14;background:#fffaf2}
.demo-banner{background:#ffc920;padding:8px 16px;font-size:14px;text-align:center}
header,main,footer{max-width:760px;margin:0 auto;padding:16px}
header{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px}
.logo{font-weight:700;font-size:20px;color:#1f1a14;text-decoration:none}
nav a{margin-right:14px;color:#6b4a1f}
footer{border-top:1px solid #e8dcc8;font-size:14px;color:#6b5d4d}
img{max-width:100%;height:auto;display:block;margin:16px 0}