:root{--primary: #475569;--primary-dark: #334155;--bg: #FFFFFF;--surface: #F9FAFB;--text: #111827;--text-secondary: #6B7280;--border: #E5E7EB;--success: #10B981;--danger: #EF4444}*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background-color:var(--bg);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;touch-action:manipulation}button{font-family:inherit;cursor:pointer;border:none;background:none;touch-action:manipulation;-webkit-tap-highlight-color:transparent}input,select,textarea{font-family:inherit}