.target-card{background:#fffaf0;border:2px solid var(--line);padding:20px;box-shadow:var(--shadow);min-width:0}.eyebrow,.sequence-label{font-size:.75rem;font-weight:700;letter-spacing:.1em;color:var(--muted)}.target-tree{max-width:650px;margin:18px auto 4px;padding:5px 12px 0}.tree-node{display:inline-flex;align-items:center;justify-content:center;gap:0;min-width:64px;min-height:48px;border:3px solid var(--ink);border-radius:50%;background:#fffdf7;padding:7px 12px;font-weight:700;font-size:1.2rem;box-shadow:3px 3px 0 #d8cdb6}.tree-node span+span{border-left:2px solid var(--ink);margin-left:7px;padding-left:7px}.root-node{display:flex;width:max-content;margin:auto;background:#ffe59c}.target-branches{height:42px;display:grid;grid-template-columns:repeat(4,1fr);max-width:560px;margin:auto}.target-branches i{border-left:3px solid var(--ink);transform-origin:top}.target-branches i:nth-child(1){transform:skewX(-38deg)}.target-branches i:nth-child(2){transform:skewX(-14deg)}.target-branches i:nth-child(3){transform:skewX(14deg)}.target-branches i:nth-child(4){transform:skewX(38deg)}.target-leaves{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;text-align:center}.range-line{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;text-align:center;font-size:.7rem;color:var(--muted);margin:10px 0 0}.puzzle-step.is-locked{opacity:.72}.letter-bank{display:flex;flex-wrap:wrap;gap:12px;margin:18px 0}.letter-card{width:52px;height:56px;border:2px solid var(--ink);background:#fff;box-shadow:4px 4px 0 var(--ink);font:800 1.45rem "Fraunces",serif;cursor:pointer}.letter-card:hover,.letter-card:focus-visible{transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--ink)}.letter-card:disabled{opacity:.24;box-shadow:none;transform:none;cursor:default}.sequence-wrap{border:2px dashed var(--ink);background:#fffdf7;padding:14px 16px;min-height:76px}.sequence-label{display:block;margin-bottom:7px}.sequence{display:block;min-height:28px;font:800 1.5rem "Fraunces",serif;letter-spacing:.28em}.tool-row,.hint-controls,.trace-nav{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:15px}.hint-button{border:0;border-bottom:2px solid var(--blue);background:transparent;color:#164e79;padding:7px 2px;cursor:pointer}.trace-step{border-color:var(--blue);box-shadow:6px 6px 0 var(--blue)}.trace-note{min-height:52px;background:#e7f0f7;border-left:6px solid var(--blue);padding:13px;line-height:1.5}.live-tree{min-height:190px;overflow-x:auto;padding:18px 8px 12px;background:#fffdf7;border:2px dashed #a9a08d}.btree{display:flex;justify-content:center;gap:26px;align-items:flex-start;min-width:max-content}.btree-subtree{display:flex;flex-direction:column;align-items:center;position:relative}.btree-children{display:flex;gap:16px;padding-top:34px;position:relative}.btree-children:before{content:"";position:absolute;left:10%;right:10%;top:17px;border-top:2px solid var(--ink)}.btree-children>.btree-subtree:before{content:"";position:absolute;top:-17px;height:17px;border-left:2px solid var(--ink)}.trace-count{font-weight:700;min-width:110px;text-align:center}.solution{margin-top:16px;border:3px solid var(--green);background:#d8f0df;padding:18px;animation:open .25s ease}.solution-line{font-size:1.15rem}.solution code,.hint code{background:#fff;padding:2px 5px;border:1px solid}.split-story{line-height:1.65;padding-left:24px}.split-story li+li{margin-top:10px}.exam-sentence{background:#fff;padding:14px;border-left:6px solid var(--green);line-height:1.55}.state-btn[aria-pressed="true"]{outline:4px solid var(--blue);outline-offset:3px}button:focus-visible,a:focus-visible{outline:4px solid var(--blue);outline-offset:3px}.feedback{display:block}.feedback:empty{display:none}
@media(max-width:700px){.target-leaves{gap:5px}.tree-node{min-width:49px;padding:6px 8px;font-size:1rem}.target-branches i:nth-child(1){transform:skewX(-24deg)}.target-branches i:nth-child(4){transform:skewX(24deg)}.range-line{font-size:.58rem}.tool-row .action{flex:1 1 190px}.btree-children{gap:9px}.live-tree{padding-left:18px;justify-content:flex-start}}