*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;font-size:14px;line-height:1.6;color:#2c3e50;background:linear-gradient(135deg,#f5f7fa,#c3cfe2);min-height:100vh}h1,h2,h3,h4,h5,h6{font-weight:600;line-height:1.2;color:#2c3e50}button{font-family:inherit}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:#f1f1f1}::-webkit-scrollbar-thumb{background:linear-gradient(135deg,#667eea,#764ba2);border-radius:5px}::-webkit-scrollbar-thumb:hover{background:linear-gradient(135deg,#764ba2,#667eea)}.text-center{text-align:center}.mt-1{margin-top:8px}.mt-2{margin-top:16px}.mt-3{margin-top:24px}.mb-1{margin-bottom:8px}.mb-2{margin-bottom:16px}.mb-3{margin-bottom:24px}