:root{--app-bg: #f1f5f9;--app-text: #0f172a;--app-muted: #64748b;--app-border: #e2e8f0;--app-shadow-sm: 0 1px 3px rgba(15, 23, 42, .06)}*,*:before,*:after{box-sizing:border-box}html,body{height:100%}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,sans-serif;background:var(--app-bg);color:var(--app-text)}