body{margin:0;background:#f3f5f7;color:#111827;font-family:Inter,system-ui,Arial,sans-serif}header{background:#111827;color:#fff;border-bottom:3px solid #dc2626;padding:16px 22px}header strong{letter-spacing:.12em}.shell{display:grid;grid-template-columns:260px minmax(0,1fr);min-height:calc(100vh - 60px)}nav{background:#1f2937;padding:12px;overflow:auto}nav a{display:block;color:#cbd5e1;text-decoration:none;padding:8px 10px;border-bottom:1px solid #374151;font-size:13px}nav a:hover{background:#fff;color:#111827}main{padding:24px;max-width:980px}.crumb{font-size:12px;color:#667085;margin-bottom:18px}.panel{background:#fff;border:1px solid #d8dde6;border-radius:6px;padding:20px;box-shadow:0 1px 2px rgba(17,24,39,.06)}h1{margin-top:0}code,pre{font-family:ui-monospace,monospace;background:#f8fafc}footer{margin-top:24px;color:#667085;font-size:12px}@media(max-width:760px){.shell{grid-template-columns:1fr}nav{display:flex;overflow:auto;white-space:nowrap}nav a{border-right:1px solid #374151;border-bottom:0}main{padding:14px}}