*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;line-height:1.6;color:#333;background:#fff}h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.2}a{color:#667eea;transition:color .3s ease}a:hover{color:#764ba2}img{max-width:100%;height:auto}.container{max-width:1200px;margin:0 auto;padding:0 2rem}.text-center{text-align:center}.mt-1{margin-top:1rem}.mt-2{margin-top:2rem}.mt-3{margin-top:3rem}.mb-1{margin-bottom:1rem}.mb-2{margin-bottom:2rem}.mb-3{margin-bottom:3rem}