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var(--challenge-line);margin-top:11px;padding-top:9px}.challenge-details summary{cursor:pointer;color:var(--challenge-ink);font-size:12px;font-weight:800}.challenge-details summary:focus-visible,.challenge-notebook summary:focus-visible{outline:3px solid var(--challenge-accent);outline-offset:3px}.challenge-evidence{background:#fff;border-radius:8px;padding:8px 15px;margin:12px 0 0}.challenge-evidence .quiet{font-size:11px;color:var(--challenge-muted)}.challenge-measure{padding:10px 0}.challenge-measure>div:first-child{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:12px}.challenge-measure output{font:12px Consolas,monospace;color:var(--challenge-ink)}.challenge-track{position:relative;height:20px;border-bottom:1px solid var(--challenge-line);margin:0 6px 10px}.challenge-track i,.challenge-track b{position:absolute;bottom:-5px;transform:translate(-50%);width:9px;height:9px;background:var(--challenge-ink);border-radius:50%}.challenge-measure:nth-of-type(3) .challenge-track i{background:var(--challenge-violet)}.challenge-track b{border-radius:0;background:var(--challenge-accent);bottom:2px}.challenge-scale{display:flex;justify-content:space-between;gap:12px;font:10px Consolas,monospace;color:var(--challenge-muted)}.challenge-scale span:nth-child(2){text-align:center;line-height:1.7}.challenge-bridge{color:var(--challenge-muted);font-size:12px}.challenge-panel .step-footer{border-top:1px solid var(--challenge-line);padding-top:14px;margin-top:17px}.challenge-notebook{list-style:none;padding:0;counter-reset:notes;margin:18px 0}.challenge-notebook li{counter-increment:notes;border-top:1px solid var(--challenge-line);padding:12px 0 12px 38px;position:relative;font-size:13px;line-height:1.7}.challenge-notebook li:before{content:counter(notes,decimal-leading-zero);position:absolute;left:0;top:12px;font:14px Consolas,monospace;color:var(--challenge-accent)}.challenge-notebook li>div,.challenge-notebook summary{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}.challenge-notebook li span{color:var(--challenge-muted);font-size:12px}.challenge-notebook details summary{cursor:pointer;list-style:none}.challenge-notebook details summary::-webkit-details-marker{display:none}.challenge-notebook details summary:after{content:"＋";color:var(--challenge-ink)}.challenge-notebook details[open] summary:after{content:"−"}.challenge-notebook li p{margin:8px 0 0}.challenge-next-labs{background:var(--challenge-paper);padding:13px 17px;border-radius:8px;font-size:13px;line-height:1.7}.challenge-next-labs h3{margin:0}.challenge-next-labs p{margin:7px 0}:root[data-theme=dark] .challenge-panel{--challenge-ink:#f0ca75;--challenge-muted:#bcb2bc;--challenge-line:#514751;--challenge-paper:#29252b;--challenge-accent:#f0ca75;--challenge-violet:#c38bf2}:root[data-theme=dark] .challenge-answer .button,:root[data-theme=dark] .challenge-evidence{background:#211f23}@media(max-width:540px){.challenge-workspace .main{padding-top:17px}.challenge-workspace .hero h1{margin-bottom:11px}.challenge-pair{gap:8px}.challenge-sound{padding:10px;gap:6px}.challenge-sound .button{padding:7px 5px;font-size:11px}.challenge-sound-head>strong{font-size:25px}.challenge-wave{display:none}.challenge-panel .panel-head{gap:12px}.challenge-evidence{padding:8px 12px}.challenge-scale{gap:5px}.challenge-panel .step-footer{gap:8px}.challenge-panel .step-footer .button{padding:9px}.challenge-playback{align-items:flex-start}.challenge-quick-measure{gap:4px 10px;font-size:11px}}