:root{font:16px/1.6 system-ui,sans-serif;color:#243047;background:#f5f7fa}main{max-width:850px;margin:40px auto;padding:24px;background:white;border-radius:16px}label{display:block;margin:16px 0}input,textarea{display:block;box-sizing:border-box;width:100%;padding:10px;border:1px solid #ccd4df;border-radius:6px;font:inherit}textarea,pre{font:13px/1.5 monospace}button{padding:10px 16px;margin:4px 0;border:0;border-radius:6px;background:#086e48;color:white;cursor:pointer}button:disabled{opacity:.5}pre{white-space:pre-wrap;overflow-wrap:anywhere}canvas{max-width:100%;image-rendering:pixelated;background:repeating-conic-gradient(#eee 0% 25%,white 0% 50%) 0/16px 16px}#message{min-height:24px}