:root{--primary: #667eea;--secondary: #764ba2;--bg: #f8f9fa;--text: #1a1a2e;--white: #ffffff;--gray: #6b7280;--shadow: 0 4px 20px rgba(0,0,0,.1)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);min-height:100vh;overscroll-behavior:none}#app{min-height:100vh;display:flex;flex-direction:column}button{font-family:inherit;cursor:pointer}