.lesson-page{background:var(--bg);color:var(--text)}.ls-wrap{max-width:1200px}.ls-crumb{display:flex;flex-wrap:wrap;gap:12px;color:var(--muted);font-size:12px;padding:28px 0}.ls-crumb a:hover{color:var(--text)}.ls-intro{display:grid;grid-template-columns:1fr 270px;gap:48px;align-items:center;padding:20px 0 42px;border-bottom:1px solid var(--border);margin-bottom:36px}.ls-eyebrow{display:flex;gap:10px;align-items:center;font-size:11px;margin-bottom:14px}.ls-eyebrow span{padding:4px 10px;background:var(--surface);border:1px solid var(--border);border-radius:6px}.ls-eyebrow span:first-child{background:#f9cc3820;border-color:#d3ab4340}.ls-intro h1{font-size:34px;line-height:1.6;margin:0 0 12px;letter-spacing:-.7px}.ls-subtitle{font-size:17px;margin:0 0 10px;font-weight:650}.ls-description{color:var(--muted);font-size:13px;line-height:2;max-width:630px}.ls-date{color:var(--muted);font-size:11px;margin-top:20px}.ls-cover{width:100%;aspect-ratio:16/9;object-fit:contain;border-radius:16px;border:1px solid var(--border)}.ls-layout{display:grid;grid-template-columns:minmax(0,1fr) 292px;gap:28px;align-items:start}.ls-sidebar{grid-column:2;grid-row:1;position:sticky;top:100px}.ls-main{grid-column:1;grid-row:1;min-width:0}.ls-outline{border:1px solid var(--border);border-radius:16px;background:var(--surface);overflow:hidden}.ls-outline summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;font-weight:750;padding:20px;font-size:15px}.ls-outline summary::-webkit-details-marker{display:none}.ls-outline summary span{font-size:11px;border:1px solid var(--border);border-radius:5px;padding:1px 8px}.ls-outline-body{padding:0 15px 20px}.ls-progress-label{font-size:11px;display:flex;justify-content:space-between;color:var(--muted);margin:4px 5px 8px}.ls-progress-label b{color:var(--text)}.ls-outline progress{display:block;width:calc(100% - 10px);height:4px;margin:0 5px 22px;border:0;border-radius:4px;background:var(--border);accent-color:#d0a634}.ls-outline progress::-webkit-progress-bar{background:var(--border)}.ls-outline progress::-webkit-progress-value{background:#d0a634}.ls-outline nav{display:grid;gap:8px}.ls-outline nav button{background:transparent;color:var(--text);border:1px solid transparent;border-radius:10px;text-align:right;padding:14px 10px;display:grid;grid-template-columns:30px 1fr 12px;gap:8px;align-items:center;cursor:pointer;font:inherit}.ls-outline nav button[aria-current]{border-color:#cfab43;background:#d2ab3810}.ls-outline nav button:hover{background:#d2ab3810}.ls-step{height:28px;width:28px;border-radius:50%;border:1px solid var(--border);display:grid;place-items:center;font-size:12px}.ls-outline [aria-current] .ls-step{background:#edc34c;color:#171710;border-color:#edc34c}.ls-outline strong{display:block;font-size:12px}.ls-outline small{display:block;font-size:10px;color:var(--muted);margin-top:5px}.ls-outline-body>p{font-size:10px;color:var(--muted);line-height:1.9;margin:20px 5px 15px}.ls-back{display:block;border-top:1px solid var(--border);padding:15px 5px 0;font-size:11px}.ls-article{background:var(--surface);border:1px solid var(--border);border-radius:18px;padding:32px}.ls-part-label{font-size:11px;color:var(--muted);display:flex;justify-content:space-between;margin-bottom:15px}.ls-part-label span{color:#9a7620}.ls-article h2{font-size:26px;margin:0 0 28px;line-height:1.7;scroll-margin-top:110px}.ls-prose{font-size:14px;line-height:2.25}.ls-prose p{margin:0 0 24px;white-space:normal}.ls-prose h3{font-size:19px;margin:32px 0 12px}.ls-prose ul{padding-right:22px}.ls-prose li{margin:8px 0;padding-right:5px}.ls-note{display:flex;gap:14px;background:#d7b5480c;border:1px solid #c6a33940;border-right:3px solid #c7a136;padding:20px;border-radius:10px;margin:25px 0}.ls-note>span{color:#b18c29;font-size:22px}.ls-note strong{font-size:15px}.ls-note p{margin:7px 0 0!important;color:var(--muted);font-size:13px}.ls-table{overflow:auto;border:1px solid var(--border);border-radius:10px;margin:25px 0}.ls-table table{width:100%;border-collapse:collapse;text-align:right;font-size:12px;min-width:440px}.ls-table caption{text-align:right;font-weight:700;padding:14px 16px;background:#b0b0b008}.ls-table th{background:#b0b0b012;font-weight:750}.ls-table td,.ls-table th{padding:13px 16px;border-bottom:1px solid var(--border);vertical-align:top}.ls-table tr:last-child td{border:0}.ls-prose img,.ls-prose video{max-width:100%;border-radius:12px}.ls-prose iframe{width:100%;aspect-ratio:16/9;border:0;border-radius:12px}.ls-prose figure{margin:24px 0}.ls-prose figcaption{font-size:11px;color:var(--muted)}.ls-summary{border-top:1px solid var(--border);margin-top:32px;padding-top:24px}.ls-summary h3,.ls-exercise h3,.ls-resources h3{font-size:16px;margin:0 0 8px}.ls-summary p,.ls-exercise p{font-size:13px;color:var(--muted);line-height:2;margin:0}.ls-exercise{display:flex;gap:16px;border-radius:12px;background:#b0b0b009;border:1px solid var(--border);padding:20px;margin-top:25px}.ls-exercise-icon{color:#b18c29;font-size:24px}.ls-completion{display:flex;justify-content:space-between;align-items:center;margin-top:32px;padding-top:24px;border-top:1px solid var(--border)}.ls-completion>span{font-size:12px;color:var(--muted);direction:ltr}.ls-done{font:inherit;font-size:12px;font-weight:700;background:#edc34c;color:#171710;border:1px solid #d4ad3e;border-radius:8px;padding:12px 17px;cursor:pointer}.ls-done.is-done{background:#d2ab3812;color:var(--text)}.ls-pagination{display:flex;justify-content:space-between;gap:20px;margin-top:25px}.ls-pagination button{background:none;border:0;color:var(--text);text-align:right;font:inherit;cursor:pointer;padding:0}.ls-pagination button:last-child{text-align:left}.ls-pagination small{display:block;font-size:10px;color:var(--muted);margin-bottom:6px}.ls-pagination strong{font-size:12px}.ls-comments{margin-top:30px;padding:28px 32px;border:1px solid var(--border);border-radius:16px;background:var(--surface)}.ls-section-head{display:flex;justify-content:space-between;gap:16px;align-items:center}.ls-section-head h2{font-size:22px;margin:0}.ls-section-head>span{color:var(--muted);font-size:10px}.ls-section-head p,.ls-muted{font-size:12px;color:var(--muted);margin:8px 0 0}.ls-empty{font-size:12px;color:var(--muted);padding:20px 0;margin:15px 0;border-block:1px solid var(--border)}.ls-comments label{display:block;font-size:12px;margin:16px 0}.ls-comments input,.ls-comments textarea{display:block;width:100%;box-sizing:border-box;margin-top:8px;border:1px solid var(--border);background:var(--bg);color:var(--text);border-radius:8px;padding:12px;font:inherit;resize:vertical}.ls-comments input{max-width:320px}.ls-form-end{display:flex;align-items:center;gap:20px}.ls-form-end small{font-size:10px;color:var(--muted)}#ls-comment-status{font-size:12px}.ls-comment{padding:20px 0;border-bottom:1px solid var(--border);font-size:13px}.ls-comment p{white-space:pre-wrap;line-height:2}.ls-related{margin:60px 0 12px}.ls-related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:24px}.ls-related .ed-card h3{font-size:15px}.ls-related .ed-card img{width:100%;height:auto;aspect-ratio:16/9;object-fit:contain}.ls-related .ed-card-body>span{font-size:11px;color:var(--muted)}.lesson-page .ed-section{padding:24px 0}.ls-toast:empty{display:none}.ls-toast{position:fixed;bottom:20px;right:20px;max-width:360px;background:var(--surface);border:1px solid var(--border);padding:15px;border-radius:10px;font-size:12px;z-index:30}.lesson-page :focus-visible{outline:2px solid #bf942b;outline-offset:4px}.ls-resources{margin-top:25px}.ls-article{animation:ls-appear .3s ease-out}@keyframes ls-appear{from{opacity:.7;transform:translateY(5px)}to{opacity:1;transform:none}}[data-motion=off] .ls-article{animation:none}@media(prefers-reduced-motion:reduce){.lesson-page *{animation:none!important;scroll-behavior:auto!important;transition:none!important}}@media(max-width:1000px){.ls-layout{grid-template-columns:minmax(0,1fr) 260px;gap:20px}.ls-article,.ls-comments{padding:24px}.ls-intro{gap:25px;grid-template-columns:1fr 230px}.ls-intro h1{font-size:29px}}@media(max-width:760px){.ls-intro{grid-template-columns:1fr;gap:24px;padding-top:5px}.ls-cover{max-width:300px}.ls-intro h1{font-size:27px}.ls-subtitle{font-size:15px}.ls-layout{display:flex;flex-direction:column;gap:20px}.ls-sidebar,.ls-main{width:100%;position:static}.ls-outline summary{padding:16px 20px}.ls-article,.ls-comments{padding:22px 18px}.ls-article h2{font-size:23px}.ls-prose{font-size:13px}.ls-related-grid{grid-template-columns:1fr;gap:16px}.ls-related .ed-card>a{display:grid;grid-template-columns:140px 1fr;align-items:center}.ls-related .ed-card h3{font-size:13px}.ls-related .ed-card-body{padding:15px}.ls-section-head h2{font-size:20px}.ls-form-end{align-items:flex-start;flex-direction:column;gap:10px}.ls-crumb{font-size:10px;gap:8px}.ls-cover{display:none}.ls-intro{margin-bottom:24px}.ls-related{margin-top:40px}}@media(max-width:380px){.ls-related .ed-card>a{grid-template-columns:110px 1fr}.ls-eyebrow{gap:5px}.ls-eyebrow span{padding:3px 6px}.ls-completion{gap:10px}}

/* Reading-focused revision: no separate introduction or comments. */
.ls-wrap{padding-top:32px}.ls-article{padding:30px}.ls-article h1{font-size:28px;line-height:1.7;margin:0 0 24px;letter-spacing:-.5px;scroll-margin-top:110px}.ls-reading-lead{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,43%);gap:26px;align-items:center;margin:0 0 30px;padding-bottom:28px;border-bottom:1px solid var(--border)}.ls-reading-copy p{font-size:14px;line-height:2.35;margin:0;color:var(--text)}.ls-reading-art{margin:0!important;border:1px solid var(--border);border-radius:14px;overflow:hidden;background:#0d1522;box-shadow:0 12px 32px #00000016;transform:rotate(-1deg)}.ls-reading-art img{display:block!important;width:100%!important;height:auto!important;aspect-ratio:16/9;object-fit:contain;border-radius:0!important}.ls-prose h3{display:flex;align-items:center;gap:10px}.ls-prose h3:before{content:'';width:5px;height:18px;background:#d4ae43;border-radius:4px;flex:none}.ls-note{background:linear-gradient(125deg,#d7b54812,transparent);padding:22px}.ls-table th{background:#c5a84b10}.ls-table tbody tr:nth-child(even){background:#88888804}.ls-summary{border:1px solid var(--border);border-right:3px solid #c7a136;padding:22px;border-radius:12px;background:#c7a13607}.ls-exercise{background:linear-gradient(120deg,#c7a1360a,transparent)}@media(max-width:1000px){.ls-reading-lead{gap:18px;grid-template-columns:minmax(0,1fr) minmax(0,42%)}.ls-article{padding:24px}.ls-reading-copy p{font-size:13px}.ls-article h1{font-size:25px}}@media(max-width:760px){.ls-wrap{padding-top:20px}.ls-reading-lead{grid-template-columns:1fr;gap:20px}.ls-reading-art{width:100%;max-width:440px;justify-self:center;transform:none}.ls-reading-copy p{font-size:14px}.ls-article{padding:22px 18px}.ls-article h1{font-size:23px}.ls-note{padding:18px}}