.lp-shell{--lp-nav-w:270px;--lp-rail-w:320px;--lp-content-max:var(--tb-page-max,1440px);--lp-accent:var(--ac-primary,#f5c518);--lp-bg:var(--ac-bg,#0b1220);--lp-card:var(--ac-card,#121a2b);--lp-border:var(--ac-border,rgba(255,255,255,0.08));--lp-text:var(--ac-text,#f4f7fb);--lp-muted:var(--ac-muted,#9aa8bc);display:grid;grid-template-columns:var(--lp-nav-w) minmax(0,1fr) var(--lp-rail-w);grid-gap:0;gap:0;min-height:calc(100vh - 72px);background:radial-gradient(1200px 500px at 10% -10%,color-mix(in srgb,var(--lp-accent) 12%,transparent),transparent 60%),radial-gradient(900px 400px at 90% 0,color-mix(in srgb,#3b82f6 10%,transparent),transparent 55%),var(--lp-bg);color:var(--lp-text);border-radius:16px;overflow:hidden;border:1px solid var(--lp-border)}.lp-shell[data-nav-collapsed=true]{grid-template-columns:52px minmax(0,1fr) var(--lp-rail-w)}.lp-shell[data-ai-collapsed=true]{grid-template-columns:var(--lp-nav-w) minmax(0,1fr)}.lp-shell[data-focus=true],.lp-shell[data-nav-collapsed=true][data-ai-collapsed=true]{grid-template-columns:52px minmax(0,1fr)}.lp-nav{display:flex;flex-direction:column;border-right:1px solid var(--lp-border);background:color-mix(in srgb,var(--lp-card) 88%,transparent);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);min-height:100%}.lp-nav-collapsed{align-items:center;padding-top:12px}.lp-icon-btn,.lp-mobile-nav-btn,.lp-nav-expand,.lp-rail-close{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--lp-border);background:color-mix(in srgb,var(--lp-card) 80%,transparent);color:var(--lp-text);border-radius:10px;width:36px;height:36px;cursor:pointer}.lp-icon-btn[data-active=true]{border-color:color-mix(in srgb,var(--lp-accent) 55%,var(--lp-border));color:var(--lp-accent)}.lp-nav-head{display:flex;align-items:flex-start;justify-content:space-between;gap:8px;padding:16px 14px 8px}.lp-nav-kicker{margin:0;font-size:11px;text-transform:uppercase;letter-spacing:.06em;color:var(--lp-muted)}.lp-nav-course{display:block;margin-top:4px;font-size:14px;line-height:1.35}.lp-nav-progress{padding:8px 14px 12px}.lp-nav-progress-meta{display:flex;justify-content:space-between;font-size:12px;margin-bottom:6px;color:var(--lp-muted)}.lp-nav-list{flex:1 1;overflow:auto;padding:0 8px 12px}.lp-nav-chapter{margin:8px 6px;font-size:11px;font-weight:700;color:var(--lp-muted);text-transform:uppercase;letter-spacing:.04em}.lp-nav-item{display:grid;grid-template-columns:20px minmax(0,1fr) auto;grid-gap:8px;gap:8px;align-items:start;padding:10px 8px;border-radius:10px;text-decoration:none;color:var(--lp-text);margin-bottom:2px}.lp-nav-item:hover{background:color-mix(in srgb,var(--lp-accent) 8%,transparent)}.lp-nav-item[data-current=true]{background:color-mix(in srgb,var(--lp-accent) 16%,transparent);outline:1px solid color-mix(in srgb,var(--lp-accent) 35%,transparent)}.lp-nav-title{font-size:13px;line-height:1.35}.lp-nav-title em{font-style:normal;color:var(--lp-muted);margin-right:4px}.lp-nav-dur{font-size:11px;color:var(--lp-muted);white-space:nowrap}.lp-nav-status{color:var(--lp-accent);margin-top:2px}.lp-nav-dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--lp-accent);margin:3px}.lp-nav-lock{opacity:.35}.lp-nav-collapse-footer{border:0;border-top:1px solid var(--lp-border);background:transparent;color:var(--lp-muted);padding:12px;cursor:pointer;display:inline-flex;align-items:center;gap:6px;justify-content:center}.lp-center{min-width:0;padding:18px 28px 48px;overflow:auto}.lp-breadcrumbs{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-size:12px;color:var(--lp-muted);margin-bottom:14px}.lp-breadcrumbs a{color:var(--lp-muted);text-decoration:none}.lp-breadcrumbs a:hover{color:var(--lp-text)}.lp-header{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:10px}.lp-title{margin:0;font-size:clamp(1.55rem,2.2vw,2rem);line-height:1.2;font-weight:750;letter-spacing:-.02em}.lp-meta-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}.lp-chip{display:inline-flex;align-items:center;gap:5px;padding:5px 10px;border-radius:999px;border:1px solid var(--lp-border);background:color-mix(in srgb,var(--lp-card) 70%,transparent);font-size:12px;color:var(--lp-muted)}.lp-header-actions{display:flex;gap:8px;flex-shrink:0}.lp-lede{color:var(--lp-muted);font-size:15px;line-height:1.6;max-width:70ch;margin:0 0 20px}.lp-content{max-width:var(--lp-content-max);margin:0 auto}.lp-blocks{display:flex;flex-direction:column;gap:18px}.lp-block{min-width:0}.lp-heading{margin:8px 0 0;letter-spacing:-.02em;line-height:1.25}.lp-activity,.lp-callout,.lp-exercise,.lp-flashcard,.lp-glossary,.lp-list,.lp-paragraph,.lp-quote{color:var(--lp-text)}.lp-list{list-style:none;padding:0;margin:0;display:grid;grid-gap:8px;gap:8px}.lp-list li{display:flex;gap:8px;align-items:flex-start;line-height:1.5}.lp-list-icon{color:var(--lp-accent);flex-shrink:0;margin-top:2px}.lp-callout{border:1px solid color-mix(in srgb,var(--lp-accent) 35%,var(--lp-border));background:color-mix(in srgb,var(--lp-accent) 8%,var(--lp-card));border-radius:14px;padding:14px 16px}.lp-callout[data-tone=info]{border-color:color-mix(in srgb,#60a5fa 40%,var(--lp-border));background:color-mix(in srgb,#60a5fa 10%,var(--lp-card))}.lp-callout[data-tone=danger],.lp-callout[data-tone=warning]{border-color:color-mix(in srgb,#f59e0b 40%,var(--lp-border));background:color-mix(in srgb,#f59e0b 10%,var(--lp-card))}.lp-callout[data-tone=success]{border-color:color-mix(in srgb,#34d399 40%,var(--lp-border));background:color-mix(in srgb,#34d399 10%,var(--lp-card))}.lp-callout-head{display:flex;align-items:center;gap:8px;margin-bottom:8px;color:var(--lp-accent)}.lp-callout-body p{margin:0 0 4px;line-height:1.55;white-space:pre-wrap}.lp-image{margin:0}.lp-image[data-align=center]{text-align:center}.lp-image[data-align=right]{text-align:right}.lp-image[data-align=full] img{width:100%;max-width:none}.lp-image-btn{border:0;padding:0;background:transparent;cursor:zoom-in;max-width:100%}.lp-gallery img,.lp-image img{max-width:min(100%,920px);border-radius:14px;border:1px solid var(--lp-border)}.lp-caption,.lp-image figcaption{font-size:12px;color:var(--lp-muted);margin-top:8px}.lp-lightbox{position:fixed;inset:0;z-index:80;background:rgba(0,0,0,.82);display:grid;place-items:center;padding:24px;cursor:zoom-out}.lp-lightbox img{max-width:min(1100px,96vw);max-height:90vh;border-radius:12px}.lp-gallery{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));grid-gap:10px;gap:10px}.lp-quote{margin:0;padding:14px 18px;border-left:3px solid var(--lp-accent);background:color-mix(in srgb,var(--lp-card) 80%,transparent);border-radius:0 12px 12px 0}.lp-code{overflow:auto;padding:14px;border-radius:12px;background:#0a0f18;border:1px solid var(--lp-border);font-size:13px}.lp-glossary{display:grid;grid-gap:10px;gap:10px;margin:0}.lp-glossary-item{padding:12px 14px;border-radius:12px;border:1px solid var(--lp-border);background:var(--lp-card)}.lp-glossary-item dt{font-weight:700;margin-bottom:4px}.lp-glossary-item dd{margin:0;color:var(--lp-muted)}.lp-flashcard{border:1px solid var(--lp-border);border-radius:12px;padding:12px 14px;background:var(--lp-card)}.lp-activity,.lp-exercise{border:1px solid var(--lp-border);border-radius:16px;padding:16px;background:color-mix(in srgb,var(--lp-card) 92%,transparent)}.lp-exercise header{display:flex;align-items:center;justify-content:space-between;gap:8px}.lp-activity h3,.lp-exercise h3{margin:0 0 10px;font-size:1.05rem}.lp-points{font-size:12px;color:var(--lp-accent);font-weight:700}.lp-exercise-input{width:100%;margin-top:10px;border-radius:12px;border:1px solid var(--lp-border);background:color-mix(in srgb,var(--lp-bg) 70%,transparent);color:var(--lp-text);padding:12px;resize:vertical}.lp-exercise-actions{display:flex;gap:8px;margin-top:10px;flex-wrap:wrap}.lp-file-btn{display:inline-flex;align-items:center;padding:8px 12px;border-radius:10px;border:1px solid var(--lp-border);cursor:pointer;font-size:13px}.lp-deadline,.lp-muted,.lp-submitted,.lp-transcript{color:var(--lp-muted);font-size:13px}.lp-transcript{margin-top:8px}.lp-transcript pre{white-space:pre-wrap;font-family:inherit}.lp-pdf-frame{width:100%;min-height:420px;border:1px solid var(--lp-border);border-radius:12px;margin-top:8px}.lp-divider{border:0;border-top:1px solid var(--lp-border);margin:8px 0}.lp-resources-inline{margin-top:28px;max-width:var(--lp-content-max)}.lp-gate-warn{margin-top:16px;padding:12px 14px;border-radius:12px;border:1px solid color-mix(in srgb,#f59e0b 45%,var(--lp-border));background:color-mix(in srgb,#f59e0b 12%,var(--lp-card));display:flex;gap:12px;align-items:center;justify-content:space-between;flex-wrap:wrap}.lp-gate-warn button{border:0;background:transparent;color:var(--lp-accent);cursor:pointer;font-weight:700}.lp-complete-bar{margin-top:20px;display:flex;gap:12px;align-items:center}.lp-completion{margin-top:24px;padding:28px 24px;border-radius:18px;border:1px solid color-mix(in srgb,var(--lp-accent) 35%,var(--lp-border));background:linear-gradient(180deg,color-mix(in srgb,var(--lp-accent) 12%,transparent),transparent),var(--lp-card);text-align:center}.lp-completion-icon{color:var(--lp-accent);margin-bottom:8px}.lp-completion h2{margin:0 0 6px}.lp-completion-sub{color:var(--lp-muted);margin:0 0 16px}.lp-completion-stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-gap:10px;gap:10px;margin-bottom:16px}.lp-completion-stats div{padding:12px;border-radius:12px;border:1px solid var(--lp-border);background:color-mix(in srgb,var(--lp-bg) 50%,transparent)}.lp-completion-stats span{display:block;font-size:11px;color:var(--lp-muted);margin-bottom:4px}.lp-completion-actions{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}.lp-completion-actions a{display:inline-flex;align-items:center;gap:6px}.lp-completion-back{display:inline-flex;align-items:center;gap:4px;margin-top:14px;color:var(--lp-muted);font-size:13px;text-decoration:none}.lp-pager{display:grid;grid-template-columns:1fr 1fr;grid-gap:12px;gap:12px;margin-top:28px;max-width:var(--lp-content-max)}.lp-pager-btn{display:flex;align-items:center;gap:10px;padding:14px 16px;border-radius:14px;border:1px solid var(--lp-border);background:var(--lp-card);text-decoration:none;color:var(--lp-text);min-height:72px}.lp-pager-btn em{display:block;font-style:normal;font-size:12px;color:var(--lp-muted)}.lp-pager-btn strong{display:block;font-size:14px;line-height:1.3}.lp-pager-next{justify-content:flex-end;text-align:right;border-color:color-mix(in srgb,var(--lp-accent) 40%,var(--lp-border));background:color-mix(in srgb,var(--lp-accent) 12%,var(--lp-card))}.lp-rail{border-left:1px solid var(--lp-border);background:color-mix(in srgb,var(--lp-card) 90%,transparent);display:flex;flex-direction:column;min-height:100%}.lp-rail-tabs{display:flex;align-items:center;gap:4px;padding:10px 8px;border-bottom:1px solid var(--lp-border);flex-wrap:wrap}.lp-rail-tabs>button{border:0;background:transparent;color:var(--lp-muted);font-size:12px;padding:7px 8px;border-radius:8px;cursor:pointer;display:inline-flex;align-items:center;gap:4px}.lp-rail-tabs>button[data-active=true]{background:color-mix(in srgb,var(--lp-accent) 16%,transparent);color:var(--lp-text)}.lp-rail-close{margin-left:auto;width:28px;height:28px}.lp-rail-body{padding:12px;overflow:auto;display:flex;flex-direction:column;gap:12px}.lp-rail-card{border:1px solid var(--lp-border);border-radius:14px;padding:12px;background:color-mix(in srgb,var(--lp-bg) 35%,transparent)}.lp-rail-card h3{margin:0 0 10px;font-size:14px}.lp-rail-progress{display:grid;grid-gap:8px;gap:8px}.lp-ai-fab,.lp-mobile-ai-btn{position:fixed;z-index:40;right:20px;bottom:84px;width:48px;height:48px;border-radius:999px;border:1px solid color-mix(in srgb,var(--lp-accent) 45%,var(--lp-border));background:color-mix(in srgb,var(--lp-accent) 18%,var(--lp-card));color:var(--lp-accent);display:inline-flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 10px 30px rgba(0,0,0,.25)}.lp-mobile-ai-btn{display:none;width:auto;padding:0 14px;gap:6px;font-weight:700}.lp-mobile-nav-btn{display:none;width:auto;padding:0 12px;height:36px}.lp-drawer{position:fixed;inset:0;z-index:60}.lp-drawer-backdrop{position:absolute;inset:0;background:rgba(0,0,0,.55)}.lp-drawer-panel{position:absolute;background:var(--lp-card);border:1px solid var(--lp-border);overflow:auto}.lp-drawer-left{top:0;left:0;bottom:0;width:min(320px,92vw)}.lp-drawer-bottom{left:0;right:0;bottom:0;max-height:78vh;border-radius:18px 18px 0 0;padding:12px 12px 24px}.lp-drawer-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}.lp-drawer-head button{border:0;background:transparent;color:var(--lp-text);cursor:pointer}@media (prefers-color-scheme:light){.academy-os[data-theme=light] .lp-shell,[data-color-scheme=light] .lp-shell{--lp-bg:#f6f7fb;--lp-card:#ffffff;--lp-border:rgba(15,23,42,0.1);--lp-text:#0f172a;--lp-muted:#64748b}}@media (max-width:1100px){.lp-shell,.lp-shell[data-ai-collapsed=true],.lp-shell[data-focus=true],.lp-shell[data-nav-collapsed=true],.lp-shell[data-nav-collapsed=true][data-ai-collapsed=true]{grid-template-columns:var(--lp-nav-w) minmax(0,1fr)}.lp-rail{display:none}.lp-mobile-ai-btn{display:inline-flex}.lp-ai-fab{display:none}}@media (max-width:820px){.lp-shell,.lp-shell[data-ai-collapsed=true],.lp-shell[data-focus=true],.lp-shell[data-nav-collapsed=true],.lp-shell[data-nav-collapsed=true][data-ai-collapsed=true]{grid-template-columns:1fr;border-radius:0;min-height:auto}.lp-nav{display:none}.lp-center{padding:14px 14px 96px}.lp-mobile-nav-btn{display:inline-flex}.lp-header{flex-direction:column}.lp-completion-stats,.lp-pager{grid-template-columns:1fr}}.lp-highlights{border:1px solid var(--lp-border);border-radius:14px;padding:12px;background:color-mix(in srgb,var(--lp-bg) 35%,transparent)}.lp-highlights-head{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:10px}.lp-highlight-list{list-style:none;margin:0;padding:0;display:grid;grid-gap:8px;gap:8px}.lp-highlight-list li{display:grid;grid-template-columns:1fr auto;grid-gap:8px;gap:8px;align-items:start}.lp-highlight-list blockquote{margin:0;font-size:13px;line-height:1.45;color:var(--lp-text);border-left:3px solid var(--lp-accent);padding-left:8px}.lp-highlight-list button{border:0;background:transparent;color:var(--lp-muted);cursor:pointer;font-size:16px}.lp-quiz-explain{margin-top:16px;text-align:left;display:grid;grid-gap:8px;gap:8px}.lp-quiz-explain details{border:1px solid var(--lp-border);border-radius:10px;padding:10px 12px;background:color-mix(in srgb,var(--lp-bg) 40%,transparent)}.lp-quiz-explain summary{cursor:pointer;font-weight:650}.lp-quiz-match,.lp-quiz-order{display:grid;grid-gap:8px;gap:8px}.academy-os-content:has(.lp-shell){max-width:none;padding-left:0;padding-right:0}