:root{--bg:#f6f7f9;--surface:#fff;--text:#1f2733;--muted:#6b7280;--border:#e5e7eb;--primary:#2563eb;--primary-ink:#fff;--danger:#dc2626;--ok-bg:#dcfce7;--ok-ink:#166534;--badge-bg:#eef2ff;--badge-ink:#3730a3;--shadow:0 1px 2px #1018280f, 0 1px 3px #1018281a;--radius:10px;--sidebar-w:240px}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{color:var(--text);background:var(--bg);font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;font-size:14px;line-height:1.45}h1{margin:0 0 2px;font-size:22px}h2{margin:0;font-size:16px}a{color:inherit;text-decoration:none}.muted{color:var(--muted)}.small{font-size:12px}.center{text-align:center}.screen-center{place-items:center;height:100vh;display:grid}.error-text{color:var(--danger);font-size:12px}code{background:#f1f5f9;border-radius:5px;padding:1px 5px;font-size:12px}.btn{border:1px solid 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