:root{--primary-color: #2563eb;--text-color: #1e293b;--bg-color: #ffffff}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;color:var(--text-color);background:var(--bg-color);margin:0;padding:1rem}.container{max-width:800px;margin:0 auto}.controls{margin-bottom:2rem}textarea{width:100%;min-height:150px;padding:.5rem;border:1px solid #ddd;border-radius:4px;margin-bottom:1rem}.buttons{display:flex;gap:.5rem}button{padding:.5rem 1rem;background:var(--primary-color);color:#fff;border:none;border-radius:4px;cursor:pointer}.content{line-height:1.6}.content h1{margin-top:2rem;margin-bottom:1rem}.content h2{margin-top:1.5rem;margin-bottom:.75rem}.content p{margin:.5rem 0}@media (max-width: 600px){body{padding:.5rem}}