:root{--red:#c51f26;--red2:#a9181e;--black:#171717;--ink:#252525;--muted:#6b7280;--bg:#f5f6f8;--card:#fff;--line:#e5e7eb;--soft:#f9fafb;--green:#1f9d55;--amber:#d97706;--blue:#2563eb;--radius:14px;--shadow:0 8px 30px rgba(0,0,0,.06)}*{box-sizing:border-box}html,body{margin:0;min-height:100%;font-family:Inter,Arial,sans-serif;color:var(--ink);background:var(--bg)}button,input,select,textarea{font:inherit}.app-shell{display:flex;min-height:100vh}.sidebar{width:250px;background:var(--black);color:#fff;position:fixed;left:0;top:0;bottom:0;overflow-y:auto;z-index:20;border-right:1px solid #2c2c2c}.brand{position:sticky;top:0;background:#fff;z-index:2;border-bottom:4px solid var(--red)}.brand-box{height:92px;display:flex;align-items:center;padding:14px 18px}.brand img{width:100%;height:63px;object-fit:contain;background:#fff}.menu-label{font-size:10px;letter-spacing:1.4px;color:#8d8d8d;padding:20px 22px 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