:root{--bg: #f4f5f9;--panel: #fff;--ink: #0f172a;--muted: #64748b;--line: #e2e8f0;--brand: #4f46e5;--accent: #4f46e5;--ok: #16a34a;--radius: 14px;--shadow: 0 1px 2px rgba(15, 23, 42, .06), 0 10px 30px -18px rgba(15, 23, 42, .35)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-size:15px;line-height:1.55;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button{font:inherit;cursor:pointer}.topbar{position:sticky;top:0;z-index:60;display:flex;align-items:center;gap:14px;height:64px;padding:0 18px;background:#ffffffeb;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}.burger{display:none;border:1px solid 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