*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:#fff;color:#000;overflow:hidden}:root{--sidebar-width:260px;--border-color:#e0e0e0;--hover-bg:#f8f8f8;--active-bg:#efefef;--focus-ring:0 0 0 2px rgba(0,0,0,.1)}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#ccc;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#999}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:none;box-shadow:var(--focus-ring)}button{font-family:inherit;cursor:pointer}button:disabled{cursor:not-allowed;opacity:.6}