:root{font-family:Segoe UI,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;-webkit-text-size-adjust:100%}*{margin:0;padding:0;box-sizing:border-box}html,body{height:100%;overflow-x:hidden}body{margin:0;min-width:320px;min-height:100vh;background:linear-gradient(135deg,#667eea,#764ba2)}#root{height:100vh;width:100vw}button{border:none;outline:none;cursor:pointer}input,textarea{outline:none}*{transition:all .2s ease}h1,h2,h3,h4,h5,h6{font-weight:600;line-height:1.2}p{line-height:1.6}button:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid #667eea;outline-offset:2px}.text-center{text-align:center}.flex-center{display:flex;align-items:center;justify-content:center}