:root{--app-bg-color:#3f5e5a;--focus-color:#ffb454;--primary-color:#9fd8cb;--secondary-color:#6f8f8a;--text-color:#424242;--card-color:#eaf5f2;--link-color:var(--primary-color);--controls-fg-color:var(--text-color);--controls-bg-color:#eaf5f2}*,:before,:after{box-sizing:border-box}body{color:var(--text-color);background-color:var(--app-bg-color);margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;line-height:1.5}a{color:var(--link-color);text-decoration:none}a:hover{color:var(--focus-color)}.toolbar{justify-content:center;margin:5px;display:flex}.toolbar h1{color:var(--card-color);margin:.4em;font-size:2.5rem;font-weight:900;line-height:1.2}@media (width<=576px){.toolbar h1{font-size:1.5em}}main{max-width:780px;margin:0 auto;padding:0 16px}.card{background-color:var(--card-color);border:3px solid var(--secondary-color);border-radius:5px;margin-bottom:1em;padding:1em 1.25em}blockquote{border-left:4px solid var(--primary-color);margin:0 0 1em;padding-left:1em}blockquote p{margin:0;font-size:1.1em}blockquote footer{color:#6b6b6b;font-size:.85em}blockquote footer:before{content:"— "}.how{margin:0}#grid{grid-template-columns:repeat(3,1fr);gap:6px;display:grid}canvas{aspect-ratio:1;border:4px solid var(--secondary-color);cursor:pointer;background:#000;border-radius:.25rem;width:100%;display:block}.parent{border-color:var(--primary-color)}.child.selected,.parent.selected{border-color:var(--focus-color)}.actions{justify-content:center;margin:1em 0;display:flex}.app-button{color:var(--controls-fg-color);appearance:none;background-color:var(--controls-bg-color);border:1px solid var(--primary-color);border-radius:.5em;padding:.6em .8em .5em;font-size:16px;font-weight:900;line-height:1.3}.app-button:hover{border-color:var(--focus-color);cursor:pointer}.app-button:focus-visible{outline:2px solid var(--focus-color);outline-offset:2px}.footer{color:var(--card-color);text-align:center;margin:2em 0 1em;font-size:.7em}