:root { --container: 1100px; }
* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif; line-height: 1.6; }
.container { max-width: var(--container); margin: 0 auto; padding: 1rem; }
.site-header { background: #111; color: #fff; }
.site-title { margin: 0; }
.site-nav ul { list-style: none; margin: 0.5rem 0 0; padding: 0; display: flex; gap: 1rem; }
.site-nav a { color: #fff; text-decoration: none; }
.content-with-sidebar { display: grid; grid-template-columns: 1fr 320px; gap: 2rem; }
.sidebar { background: #f7f7f7; padding: 1rem; }
.site-footer { background: #f0f0f0; margin-top: 3rem; }
.top, .bottom { padding: 1rem 0; }