/* Learning paths inherit Brain's palette and glass; color carries a named role. */
.ls2{--evidence:#4393a3;--claim:#8876ad;--limit:#b18b4b;--counter:#ac6e79;max-width:1500px;margin:auto;text-transform:none}.ls2 *{box-sizing:border-box}.ls2 h1,.ls2 h2,.ls2 h3,.ls2 h4{font-weight:450;letter-spacing:-.025em}.ls2 h2{font-size:28px;line-height:1.3}.ls2 h3{font-size:22px}.ls2 h4{font-size:17px;margin:0 0 13px}.ls2 p{line-height:1.85;font-size:14px;color:var(--text2);max-width:82ch}.ls2 small{color:var(--muted)}.ls2 button,.ls2 select{font:inherit}.ls2 .btn{white-space:normal}.l2-glass{border:1px solid #ffffffcf;border-radius:17px;background:rgba(255,255,255,.52);box-shadow:inset 0 1px #ffffffbd,0 8px 30px #45496006;backdrop-filter:blur(22px) saturate(145%);padding:25px;margin:17px 0}.l2-top{display:flex;align-items:center;justify-content:space-between;gap:15px;flex-wrap:wrap}.l2-route{display:flex;gap:10px;flex-wrap:wrap;font-size:12px;color:var(--muted);align-items:center;margin:17px 0}.l2-route span:not(:last-child)::after{content:'→';margin-left:10px;color:#9488af}.l2-layout{display:grid;grid-template-columns:235px minmax(0,1fr);gap:30px}.l2-nav{position:sticky;top:24px;align-self:start;max-height:calc(100vh - 110px);overflow:auto;padding-right:7px}.l2-nav button{width:100%;text-align:left;background:transparent;border:1px solid transparent;border-radius:10px;padding:10px 11px;margin:3px 0;color:var(--text2);font-size:12px;line-height:1.5;cursor:pointer}.l2-nav button[aria-current=true]{background:#ffffffaa;border-color:#fff}.l2-nav button.child{padding-left:25px;font-size:11px}.l2-nav .l2-count{font-size:10px;color:var(--muted);display:block}.l2-body{min-width:0;max-width:1120px}.l2-sticky{position:sticky;top:6px;z-index:4;background:#f8f9fcce;backdrop-filter:blur(20px);border:1px solid #ffffffc9;padding:9px 14px;border-radius:12px;display:flex;gap:10px;justify-content:space-between;align-items:center;font-size:12px}.l2-sticky label{display:flex;gap:8px;align-items:center;cursor:pointer}.l2-map{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;margin:20px 0}.l2-node{border:1px solid #a89ac657;border-radius:12px;background:#ffffff45;padding:15px;position:relative;font-size:13px;line-height:1.75}.l2-node small{display:block;text-transform:uppercase;letter-spacing:.1em;font-size:9px;margin-bottom:7px}.l2-node:not(:last-child)::after{content:'→';position:absolute;right:-19px;top:43%;color:#9488af}.l2-arrow{display:flex;align-items:center;gap:12px;margin:23px 0;color:#9184a7;font-size:26px;line-height:1}.l2-arrow::after{content:'';height:1px;flex:1;background:linear-gradient(90deg,#a394be55,transparent)}.l2-arrow span{font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}.l2-copyblock{border-bottom:1px solid #85809218;padding:18px 0}.l2-copyblock:last-child{border:0}.l2-copyblock p,.l2-copyblock li{font-size:14px;line-height:1.9;color:var(--text2)}.l2-copyblock ul,.l2-copyblock ol{padding-left:22px}.l2-copyblock table{font-size:12px;border-collapse:collapse;width:100%}.l2-copyblock th,.l2-copyblock td{padding:9px;border-bottom:1px solid #9292a32a}.l2-reading-anchors{display:flex;gap:10px;flex-wrap:wrap;align-items:center;font-size:12px;line-height:1.65;margin:14px 0 4px}.l2-reading-anchors .l2-quote{border:1px solid #a294be6b;border-radius:6px;padding:5px 9px;max-width:100%;background:#ffffff35}.l2-caption{font-size:10px;color:var(--muted);letter-spacing:.04em}.l2-example{margin-top:40px;scroll-margin-top:70px}.l2-example>header{padding:4px 0 12px;border-bottom:1px solid #9990b331}.l2-example>header h3{margin:8px 0 10px}.l2-kicker{font-size:10px;letter-spacing:.13em;text-transform:uppercase;color:var(--muted)}.l2-source{font-size:15px;line-height:2.15;color:var(--text);white-space:pre-wrap;margin:18px 0;user-select:text}.l2-source mark{background:transparent;color:inherit;box-decoration-break:clone;-webkit-box-decoration-break:clone;border:1px solid var(--evidence);padding:1px 3px;border-radius:5px}.l2-source mark[data-role=conclusion]{border-color:var(--claim)}.l2-source mark[data-role=rule]{border-color:#788caf}.l2-source mark[data-role=contrast],.l2-source mark[data-role=context]{border-color:#959ba5}.l2-source mark[data-role=gap]{border-color:var(--limit)}.l2-source mark[data-role=error]{border-color:var(--counter)}.l2-legend{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px;font-size:11px;color:var(--muted)}.l2-legend span{border:1px solid #898e9d66;border-radius:6px;padding:4px 8px}.l2-legend [data-role=support]{border-color:var(--evidence)}.l2-legend [data-role=conclusion]{border-color:var(--claim)}.l2-legend [data-role=rule]{border-color:#788caf}.l2-legend [data-role=gap]{border-color:var(--limit)}.l2-step{position:relative;padding:23px 25px;background:#ffffff49;border:1px solid #ffffffcc;border-radius:14px;margin:0}.l2-step .l2-map{margin-bottom:0}.l2-step+ .l2-arrow{margin:17px 0}.l2-step p:last-child{margin-bottom:0}.l2-check{border:1px solid #b3a4cc70;border-radius:14px;padding:22px;background:#ffffff7a;margin:16px 0}.l2-check h4{margin-top:8px;line-height:1.7}.l2-options{display:grid;gap:8px;margin:15px 0}.l2-option{width:100%;display:flex;gap:12px;text-align:left;padding:12px 15px;border:1px solid #bfc1ce73;background:#ffffff48;border-radius:9px;color:var(--text);font-size:13px;line-height:1.75;cursor:pointer}.l2-option:hover:not(:disabled){background:#fff9;border-color:#a297b9}.l2-option[aria-pressed=true]{border-color:#9380b0;background:#efe9f655}.l2-option[data-result=right]{border-color:#5e9a90;background:#dfeee642}.l2-option[data-result=wrong]{border-color:#b8868f;background:#f4e1e442}.l2-option:disabled{cursor:default;opacity:1}.l2-option .l2-letter{font-size:10px;padding-top:3px;color:var(--muted);flex-shrink:0;width:14px}.l2-feedback{font-size:13px;line-height:1.8;border-left:2px solid #b0a3c5;padding:12px 16px;margin:16px 0;background:#ffffff3d}.l2-feedback.right{border-color:#599c8a}.l2-feedback.wrong{border-color:#b7828d}.l2-feedback strong{display:block;margin-bottom:5px}.l2-feedback p{font-size:13px;margin:5px 0}.l2-toolbar{display:flex;align-items:center;gap:9px;flex-wrap:wrap;margin:12px 0}.l2-toolbar select{padding:8px 10px;background:#fffa;border:1px solid #c7bfd6;border-radius:8px;font-size:12px;color:var(--text)}.l2-selection{min-height:28px;font-size:12px;color:var(--text2);line-height:1.7}.l2-source-box{padding:20px 24px;border:1px solid #ffffffd5;border-radius:14px;background:#ffffff57}.l2-source-box summary{font-size:12px;cursor:pointer;color:var(--text2)}.l2-paragraph-map{display:grid;gap:10px;margin-top:14px}.l2-paragraph-map div{display:flex;gap:14px;align-items:start;border-left:1px solid #a89abe;padding-left:13px;font-size:13px;line-height:1.8}.l2-paragraph-map small{min-width:25px;padding-top:3px}.l2-disclosure{font-size:12px;line-height:1.8;color:var(--muted);margin:10px 0}.l2-review{border-color:#aec8ce88}.l2-unit-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:12px}.l2-unit-list button{text-align:left;padding:18px;border:1px solid #fff;background:#fff6;border-radius:12px;cursor:pointer;color:var(--text);font:inherit}.l2-unit-list strong{font-weight:450}.l2-unit-list small{display:block;margin-top:8px;font-size:11px}.l2-note textarea{width:100%;min-height:110px;resize:vertical;border:1px solid #ddd5e6;border-radius:9px;padding:15px;background:#ffffff70;font:inherit;font-size:13px;line-height:1.8}.l2-glass details summary{cursor:pointer;font-size:13px;color:var(--text2)}.l2-glass details[open] summary{margin-bottom:14px}.l2-lock{padding:18px;color:var(--muted);font-size:13px;line-height:1.8;border:1px dashed #b4a9c57d;border-radius:10px}.l2-reset{font-size:11px!important}.l2-note-status{font-size:10px;color:var(--muted)}.l2-source:focus{outline:1px solid #a99abb;outline-offset:7px}.l2-empty{font-size:12px;color:var(--muted)}
@media(max-width:1200px){.l2-layout{grid-template-columns:1fr}.l2-nav{position:static;display:flex;max-height:130px;overflow:auto;gap:5px;flex-wrap:wrap}.l2-nav button{width:auto;max-width:250px;padding:8px 12px}.l2-nav button.child{padding-left:12px}.l2-nav .l2-count{display:none}.l2-body{max-width:none}}
@media(max-width:650px){.l2-glass,.l2-step,.l2-source-box,.l2-check{padding:17px}.l2-map{grid-template-columns:1fr;gap:20px}.l2-node:not(:last-child)::after{content:'↓';right:auto;left:20px;top:auto;bottom:-24px}.l2-source{font-size:14px}.l2-top{align-items:start}.l2-sticky{position:static}.ls2 h2{font-size:25px}.l2-nav{max-height:150px}.l2-reading-anchors{font-size:11px}.l2-option{padding:10px}.l2-sticky>span{max-width:60%}}
@media(prefers-reduced-motion:reduce){.ls2 *{scroll-behavior:auto!important;transition:none!important}}

.l2-comparison .l2-node:not(:last-child)::after{content:"↔"}.l2-copyblock h1{font-size:22px}.l2-copyblock h2{font-size:23px}

.l2-sentence{cursor:text;border-radius:4px}.l2-sentence:focus{outline:1px dashed #a99bbb;outline-offset:2px}.l2-sentence[data-selected]{background:#bab0d126;box-shadow:0 0 0 1px #b6abc855}