.hf-exercise-choices{display:flex;gap:8px;flex-wrap:wrap;margin:20px 0}.hf-exercise-choices button{padding:11px 18px;border:1px solid var(--line);border-radius:10px;background:white;color:var(--ink);font-weight:700;cursor:pointer;min-height:43px}.hf-exercise-choices button[aria-pressed=true]{color:white;background:var(--blue);border-color:var(--blue)}.hf-exercise-layout{display:grid;grid-template-columns:235px minmax(0,1fr);gap:20px;align-items:start}.hf-exercise-list{padding:10px;display:grid;gap:7px;position:sticky;top:18px;border:1px solid var(--line);border-radius:18px;background:white}.hf-exercise-list button{border:0;padding:13px 12px;border-radius:11px;text-align:left;background:transparent;font-weight:700;cursor:pointer;line-height:1.35}.hf-exercise-list button[aria-current=true]{background:#e5eeff;color:var(--dark)}.hf-exercise-list small{display:block;margin-top:5px;font-weight:400;color:var(--muted);font-size:11px}.hf-exercise-card{min-width:0}.hf-task-text{display:block;padding:18px 20px;background:#edf3fd;border:1px solid #d3dff2;border-radius:11px;font:700 clamp(1.15rem,4vw,1.5rem)/1.5 ui-monospace,monospace;white-space:pre-wrap;overflow-wrap:anywhere;margin:22px 0}.hf-task-note{font-size:12px;color:var(--muted);line-height:1.5}.hf-exercise-card .hf-table{max-width:620px}.hf-exercise-card .hf-code{max-width:180px;min-width:95px}.hf-exercise-card label.answer-label{display:block;font-weight:700;margin:24px 0 9px}.hf-exercise-card textarea.hf-long{min-height:95px;resize:vertical;letter-spacing:.04em}.hf-exercise-card .hf-actions{margin-top:18px}.hf-help-panel{margin-top:20px;padding:20px;border:1px solid #e5d3a5;background:#fff8e9;border-radius:13px;line-height:1.65}.hf-help-panel h3{margin:0 0 8px;color:#805d12;font-size:17px}.hf-help-panel p{margin:8px 0}.hf-model-panel{margin-top:22px;padding-top:24px;border-top:2px solid #d8e6dc;line-height:1.65}.hf-model-panel h3{margin:0;font-size:21px;color:#176d48}.hf-model-panel h4{margin:22px 0 10px}.hf-model-panel ol{padding-left:24px}.hf-model-panel li{margin-bottom:5px}.hf-model-panel .hf-bits{line-height:1.9}.hf-segments{display:flex;flex-wrap:wrap;gap:7px;margin:16px 0}.hf-segment{display:grid;gap:4px;min-width:40px;padding:8px;border:1px solid var(--line);border-radius:8px;background:white;text-align:center;font:12px/1.3 ui-monospace,monospace}.hf-segment b{font-family:system-ui}.hf-exercise-card .hf-treebox{max-width:100%;overflow:auto}.hf-exercise-card .hf-treebox>.hf-tree{width:max-content;min-width:100%;justify-content:center}.hf-workspace{margin-top:25px;border-top:1px solid var(--line);padding-top:12px}.hf-workspace summary{cursor:pointer;padding:7px 0;color:var(--muted);font-size:13px}.hf-workspace textarea{margin-top:9px;min-height:100px}.hf-practice-score{font-size:13px;color:var(--muted);min-width:130px}.hf-exercise-card button:focus-visible,.hf-exercise-choices button:focus-visible,.hf-exercise-list button:focus-visible{outline:3px solid #8dabf7;outline-offset:3px}[hidden]{display:none!important}@media(max-width:820px){.hf-exercise-layout{grid-template-columns:1fr}.hf-exercise-list{position:static;grid-template-columns:repeat(3,minmax(0,1fr));gap:4px;padding:7px}.hf-exercise-list button{font-size:12px;padding:10px 8px}.hf-exercise-list small{font-size:10px}.hf-exercise-card{padding:23px 19px}}@media(max-width:440px){.hf-exercise-list button{font-size:11px}.hf-exercise-card .hf-table td,.hf-exercise-card .hf-table th{padding:8px}.hf-help-panel{padding:15px}.hf-exercise-card .hf-actions .hf-btn{font-size:12px;padding:10px 12px}.hf-task-text{padding:13px}.hf-model-panel .hf-table{font-size:12px}}
.hf-exercise-card .hf-edge{top:5px;left:50%;transform:translateX(-50%)}
.hf-guide{margin:22px 0;padding:16px;border:1px solid #cddcf4;border-radius:12px;background:#f5f8ff;min-width:0}.hf-guide>summary{cursor:pointer;font-weight:750;color:var(--dark);line-height:1.5}.hf-guide>summary:focus-visible{outline:3px solid #8dabf7;outline-offset:4px}.hf-guide>p{font-size:13px;line-height:1.6}.hf-guide-progress{font-size:13px;font-weight:750;color:var(--dark);margin:18px 0 10px}.hf-guide-forest{display:flex;align-items:flex-start;gap:12px;max-width:100%;overflow-x:auto;padding:6px 3px 12px;overscroll-behavior-x:contain}.hf-guide-root{flex:0 0 auto;min-width:135px;max-width:100%;padding:10px 8px 4px;border:2px solid #d9e2ef;border-radius:11px;background:white}.hf-guide-root.is-selected{border-color:var(--blue);background:#eaf1ff}.hf-guide-root>button{display:block;margin:0 auto 6px;padding:9px 10px;border:1px solid #cddcf4;border-radius:8px;background:#fff;color:var(--ink);font-size:12px;cursor:pointer;min-height:40px}.hf-guide-root>button[aria-pressed=true]{background:var(--blue);color:white;border-color:var(--blue)}.hf-guide-root>button:disabled{cursor:default;background:#eef6ef;color:#24603d}.hf-guide .hf-treebox{margin:0;padding:6px 2px 12px;border:0;background:transparent}.hf-guide .hf-tree-node.leaf{white-space:nowrap}.hf-guide .hf-actions{gap:8px;flex-wrap:wrap}.hf-guide .hf-feedback{margin-bottom:0;overflow-wrap:anywhere}.hf-guide .hf-btn:disabled{opacity:.55;cursor:default}@media(max-width:440px){.hf-guide{padding:12px}.hf-guide-root{min-width:124px}.hf-guide .hf-actions .hf-btn{font-size:11px;padding:9px}.hf-guide>summary{font-size:14px}}