:root{--color-background:#fff;--color-surface:#f6f6f6;--color-border:#e2e2e2;--color-text:#111;--color-muted:#6b6b6b;--color-accent:#1f4fd8;--color-danger:#c62828;--color-overlay:#11111180;--font-sans:Inter, system-ui, sans-serif;--sidebar-width:240px;--content-max-width:1200px;--radius:0}*,:before,:after{box-sizing:border-box}html,body,#root{min-height:100%}body{background:var(--color-background);color:var(--color-text);font-family:var(--font-sans);margin:0;font-size:15px;line-height:1.5}h1,h2,h3,p{margin-top:0}a{color:var(--color-accent)}button,input,select,textarea{font:inherit;border-radius:0}:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}.visually-hidden{clip:rect(0 0 0 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.app-shell{grid-template-columns:var(--sidebar-width) minmax(0, 1fr);min-height:100vh;display:grid}.sidebar{border-right:1px solid 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