:root{--primary:#1769ff;--primary-soft:#edf4ff;--text:#172033;--muted:#7a879c;--line:#e5ebf3;--bg:#f7f9fc;--card:#fff;--success:#16a34a;--success-bg:#eaf8ef;--danger:#ef4444;--danger-bg:#fff0f1;--warning:#f59e0b;--warning-bg:#fff7e7;--shadow:0 8px 30px rgba(15,23,42,.055)}*{box-sizing:border-box}html{font-size:14px}body{margin:0;background:var(--bg);color:var(--text);font-family:Tahoma,"Segoe UI",Arial,sans-serif;line-height:1.6}.app-shell{min-height:100vh}.sidebar{position:fixed;right:0;top:0;bottom:0;width:245px;background:#fff;border-left:1px solid var(--line);padding:0 14px 18px;display:flex;flex-direction:column;z-index:30}.brand{height:72px;display:flex;align-items:center;gap:10px;border-bottom:1px solid var(--line);padding:0 8px}.brand-mark{width:40px;height:40px;border-radius:12px;background:var(--primary-soft);display:grid;place-items:center;font-size:22px}.brand strong{display:block;font-size:16px}.brand 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