*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:system-ui,-apple-system,sans-serif;background:#f9fafb;color:#111827;min-height:100vh}.topbar{display:flex;align-items:center;justify-content:space-between;padding:.75rem 1.25rem;background:#fff;border-bottom:1px solid #e5e7eb;position:sticky;top:0;z-index:10}.topbar-title{font-weight:600;font-size:1rem;color:#111827}.topbar-user{display:flex;align-items:center;gap:.75rem;font-size:.875rem;color:#6b7280}.btn{padding:.4rem .9rem;border-radius:6px;font-size:.875rem;font-weight:500;cursor:pointer;border:1px solid transparent;transition:background .15s,color .15s}.btn-primary{background:#2563eb;color:#fff;border-color:#2563eb}.btn-primary:hover{background:#1d4ed8}.btn-secondary{background:#fff;color:#374151;border-color:#d1d5db}.btn-secondary:hover{background:#f3f4f6}.main{max-width:800px;margin:3rem auto;padding:0 1.25rem;text-align:center}.main h1{font-size:1.75rem;font-weight:700;margin-bottom:.75rem;color:#111827}.main p{color:#6b7280;font-size:1rem;line-height:1.6}