html[data-surface=learn]{--bg: #f7f8fa;--bg-raised: #ffffff;--bg-inset: #f0f2f5;--bg-hover: #e9ecf1;--border: #dfe3e9;--border-strong: #c7cdd6;--text: #16191f;--text-dim: #545c6a;--text-faint: #7c8595;--accent: #2c5fd4;--accent-dim: #dee8ff;--ok: #12855b;--warn: #9a6400;--danger: #c2333a;--radius: 10px;--gap: 20px;color-scheme:light}html[data-surface=learn] body{background:var(--bg);color:var(--text)}html[data-surface=studio]{--radius: 6px;--gap: 16px}html[data-surface=console]{--radius: 4px;--gap: 14px}.lms-shell{display:flex;min-height:100vh;background:var(--bg);color:var(--text)}.lms-nav{width:232px;flex:0 0 232px;background:var(--bg-raised);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:14px 0;position:sticky;top:0;height:100vh;overflow-y:auto}.lms-brand{padding:2px 18px 16px}.lms-brand-title{font-weight:680;font-size:15px;letter-spacing:-.01em}.lms-brand-sub{font-size:11px;color:var(--text-faint);margin-top:1px}.lms-nav-group{padding:16px 18px 5px;font-size:10px;text-transform:uppercase;letter-spacing:.09em;color:var(--text-faint);font-weight:600}.lms-nav-link{display:flex;align-items:center;gap:10px;margin:1px 10px;padding:8px 10px;border-radius:7px;color:var(--text-dim);font-size:13.5px;cursor:pointer;text-decoration:none}.lms-nav-link:hover{background:var(--bg-hover);color:var(--text);text-decoration:none}.lms-nav-link.active{background:var(--accent-dim);color:var(--accent);font-weight:560}html[data-surface=studio] .lms-nav-link.active,html[data-surface=console] .lms-nav-link.active{color:#cfe0ff}.lms-nav-icon{width:16px;text-align:center;font-size:14px;flex:0 0 16px}.lms-nav-badge{margin-left:auto;font-size:10.5px;font-family:var(--mono);background:var(--danger);color:#fff;border-radius:9px;padding:0 6px;line-height:16px}.lms-main{flex:1;min-width:0;display:flex;flex-direction:column}.lms-topbar{display:flex;align-items:center;gap:14px;padding:12px 24px;border-bottom:1px solid var(--border);background:var(--bg-raised);position:sticky;top:0;z-index:30}.lms-content{padding:24px;max-width:1400px;width:100%}.lms-content.wide{max-width:none}.lms-page-head{margin-bottom:22px}.lms-page-title{font-size:22px;font-weight:660;letter-spacing:-.015em;margin:0}.lms-page-sub{color:var(--text-dim);font-size:13.5px;margin:5px 0 0;max-width:78ch}.lms-page-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.lms-row-between{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;flex-wrap:wrap}.lms-card{background:var(--bg-raised);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}.lms-card-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:13px 16px;border-bottom:1px solid var(--border);font-size:13.5px;font-weight:620}.lms-card-body{padding:16px}.lms-card-body.flush{padding:0}.lms-grid{display:grid;gap:var(--gap)}.lms-grid.c2{grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}.lms-grid.c3{grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}.lms-grid.c4{grid-template-columns:repeat(auto-fit,minmax(190px,1fr))}.lms-grid.courses{grid-template-columns:repeat(auto-fill,minmax(268px,1fr))}.course-card{background:var(--bg-raised);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;text-decoration:none;color:inherit;transition:border-color .12s,transform .12s}.course-card:hover{border-color:var(--border-strong);text-decoration:none;transform:translateY(-1px)}.course-thumb{aspect-ratio:16 / 9;background:var(--bg-inset);position:relative;display:grid;place-items:center;color:var(--text-faint);font-size:26px}.course-thumb img{width:100%;height:100%;object-fit:cover;display:block}.course-flag{position:absolute;top:8px;left:8px;font-size:10.5px;font-weight:600;letter-spacing:.04em;text-transform:uppercase;padding:3px 7px;border-radius:4px;background:#0009;color:#fff;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px)}.course-flag.live{background:var(--danger)}.course-flag.hybrid{background:var(--accent)}.course-body{padding:13px 14px 14px;display:flex;flex-direction:column;gap:6px;flex:1}.course-title{font-size:14.5px;font-weight:620;line-height:1.32;margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.course-meta{font-size:12px;color:var(--text-dim);display:flex;gap:8px;flex-wrap:wrap}.course-meta .dot-sep:before{content:"\b7";margin-right:8px;color:var(--text-faint)}.course-foot{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-top:auto;padding-top:8px}.course-price{font-weight:660;font-size:15px}.course-price .was{font-weight:400;font-size:12px;color:var(--text-faint);text-decoration:line-through;margin-left:6px}.course-price.free{color:var(--ok)}.rating{display:inline-flex;align-items:center;gap:4px;font-size:12px}.rating-stars{color:#e8a33d;letter-spacing:-1px}.stat{background:var(--bg-raised);border:1px solid var(--border);border-radius:var(--radius);padding:14px 16px}.stat-label{font-size:10.5px;text-transform:uppercase;letter-spacing:.08em;color:var(--text-faint);font-weight:600;margin-bottom:6px}.stat-value{font-size:26px;font-weight:660;line-height:1.1;letter-spacing:-.02em;font-variant-numeric:tabular-nums}.stat-sub{font-size:12px;color:var(--text-dim);margin-top:3px}.stat-trend.up{color:var(--ok)}.stat-trend.down{color:var(--danger)}.progress{height:7px;background:var(--bg-inset);border-radius:4px;overflow:hidden}.progress>span{display:block;height:100%;background:var(--accent);border-radius:4px;transition:width .3s ease}.progress.done>span{background:var(--ok)}.progress-label{display:flex;justify-content:space-between;font-size:11.5px;color:var(--text-dim);margin-bottom:5px}.curriculum{display:flex;flex-direction:column}.curr-section{border-bottom:1px solid var(--border)}.curr-section:last-child{border-bottom:none}.curr-section-head{display:flex;align-items:center;gap:10px;padding:12px 14px;cursor:pointer;background:var(--bg-inset);font-size:13.5px;font-weight:600}.curr-section-head:hover{background:var(--bg-hover)}.curr-section-meta{margin-left:auto;font-size:11.5px;color:var(--text-faint);font-weight:400;font-variant-numeric:tabular-nums}.curr-lesson{display:flex;align-items:center;gap:10px;padding:9px 14px 9px 18px;font-size:13px;cursor:pointer;border-left:2px solid transparent;color:inherit;text-decoration:none}.curr-lesson:hover{background:var(--bg-hover);text-decoration:none}.curr-lesson.current{background:var(--accent-dim);border-left-color:var(--accent);font-weight:560}.curr-lesson.locked{color:var(--text-faint);cursor:not-allowed}.curr-lesson-icon{flex:0 0 18px;text-align:center;font-size:13px}.curr-lesson-title{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.curr-lesson-time{font-size:11px;color:var(--text-faint);font-variant-numeric:tabular-nums}.curr-lock-reason{font-size:11px;color:var(--warn);padding:0 14px 8px 46px}.player-shell{display:flex;flex-direction:column;min-height:100vh;background:#0b0d10;color:#e5e9ef}.player-bar{display:flex;align-items:center;gap:12px;padding:10px 16px;border-bottom:1px solid #232830;background:#12151a;font-size:13px}.player-crumb{color:#9aa4b2;display:flex;gap:8px;align-items:center;min-width:0}.player-crumb b{color:#e5e9ef;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.player-body{display:flex;flex:1;min-height:0;align-items:flex-start}.player-stage{flex:1;min-width:0;display:flex;flex-direction:column}.player-media{background:#000;aspect-ratio:16/9;width:100%;position:relative}.player-media video,.player-media iframe{width:100%;height:100%;display:block;border:0}.player-article{padding:26px 30px;max-width:74ch;line-height:1.68;font-size:15px}.player-article h2{color:#e5e9ef}.player-side{width:340px;flex:0 0 340px;border-left:1px solid #232830;background:#12151a;align-self:stretch;overflow-y:auto;max-height:100vh}.player-locked{display:grid;place-items:center;min-height:340px;text-align:center;padding:40px 24px}.player-locked-icon{font-size:34px;margin-bottom:12px;opacity:.55}.player-under{padding:18px 20px 40px;border-top:1px solid #232830}.player-nav{display:flex;gap:8px;padding:12px 16px;border-top:1px solid #232830}.player-side.hidden{display:none}.player-progress-text{color:#9aa4b2;font-size:12px;white-space:nowrap}.player-lesson-line{display:flex;flex-wrap:wrap;gap:10px;align-items:center;padding:14px 20px 10px;font-size:12.5px}.player-buffering{position:absolute;inset:0;z-index:10;display:flex;flex-direction:column;gap:8px;align-items:center;justify-content:center;background:#0006;color:#fff;font-size:14px;font-weight:500;pointer-events:none}.player-buffering .spinner{width:32px;height:32px;border-radius:50%;border:3px solid rgba(255,255,255,.3);border-top-color:#fff;animation:player-spin .8s linear infinite}@keyframes player-spin{to{transform:rotate(360deg)}}.player-watermark{position:absolute;width:200%;height:200%;pointer-events:none;z-index:5;-webkit-user-select:none;user-select:none;transform:rotate(-22deg);transform-origin:center;display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:60px 80px;opacity:.12;color:#fff;text-shadow:0 1px 2px rgba(0,0,0,.45);font-weight:600;font-size:13px;line-height:1.3;letter-spacing:.04em}.player-watermark>div{text-align:center;white-space:nowrap}.player-watermark small{display:block;font-size:10px;opacity:.8;margin-top:2px}.player-media{overflow:hidden}.player-side .curr-section-head{background:#0e1116;color:#e5e9ef}.player-side .curr-section-head:hover{background:#1a1f26}.player-side .curr-lesson{color:#c8cfda}.player-side .curr-lesson:hover{background:#1a1f26;color:#e5e9ef}.player-side .curr-lesson.current{background:#16233a;color:#cfe0ff;border-left-color:#4c8dff}.player-side .curr-lesson.locked,.player-side .curr-lesson-time{color:#646e7d}.player-side .progress{background:#1a1f26}.player-side .curr-section{border-bottom-color:#232830}.lms-field{margin-bottom:16px}.lms-field>label{display:block;font-size:12.5px;font-weight:580;color:var(--text);margin-bottom:5px}.lms-field .hint{font-size:11.5px;color:var(--text-faint);margin-top:4px}.lms-field .err{font-size:11.5px;color:var(--danger);margin-top:4px}.lms-input,.lms-select,.lms-textarea{width:100%;font-family:var(--sans);font-size:13.5px;padding:9px 11px;background:var(--bg-raised);color:var(--text);border:1px solid var(--border-strong);border-radius:7px}.lms-input:focus,.lms-select:focus,.lms-textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-dim)}.lms-textarea{min-height:96px;resize:vertical;line-height:1.55}.lms-check{display:flex;align-items:flex-start;gap:9px;font-size:13px;cursor:pointer}.lms-check input{margin-top:2px}.lms-btn{font-family:var(--sans);font-size:13.5px;font-weight:560;padding:9px 16px;border-radius:7px;cursor:pointer;white-space:nowrap;background:var(--bg-raised);color:var(--text);border:1px solid var(--border-strong);display:inline-flex;align-items:center;gap:7px;text-decoration:none}.lms-btn:hover:not(:disabled){background:var(--bg-hover);text-decoration:none}.lms-btn:disabled{opacity:.45;cursor:not-allowed}.lms-btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}.lms-btn.primary:hover:not(:disabled){filter:brightness(1.08)}.lms-btn.danger{background:transparent;border-color:var(--danger);color:var(--danger)}.lms-btn.danger:hover:not(:disabled){background:var(--danger);color:#fff}.lms-btn.ghost{background:transparent;border-color:transparent;color:var(--text-dim)}.lms-btn.ghost:hover:not(:disabled){background:var(--bg-hover);color:var(--text)}.lms-btn.sm{padding:5px 10px;font-size:12.5px}.lms-btn.lg{padding:12px 22px;font-size:15px}.lms-btn.block{width:100%;justify-content:center}.chip{display:inline-flex;align-items:center;gap:5px;font-size:11.5px;font-weight:550;padding:3px 9px;border-radius:20px;border:1px solid var(--border-strong);color:var(--text-dim);background:var(--bg-raised);white-space:nowrap;cursor:default}.chip.selectable{cursor:pointer}.chip.selectable:hover{border-color:var(--accent);color:var(--accent)}.chip.on{background:var(--accent-dim);border-color:var(--accent);color:var(--accent)}.chip.ok{color:var(--ok);border-color:currentColor}.chip.warn{color:var(--warn);border-color:currentColor}.chip.bad{color:var(--danger);border-color:currentColor}.chip.live{color:#fff;background:var(--danger);border-color:var(--danger)}.chip.live:before{content:"";width:6px;height:6px;border-radius:50%;background:currentColor;animation:lms-pulse 1.6s ease-in-out infinite}@keyframes lms-pulse{0%,to{opacity:1}50%{opacity:.25}}.chip.st-draft{color:var(--text-faint)}.chip.st-submitted,.chip.st-under_review{color:var(--accent);border-color:currentColor}.chip.st-changes_requested{color:var(--warn);border-color:currentColor}.chip.st-approved{color:var(--ok);border-color:currentColor}.chip.st-published{color:#fff;background:var(--ok);border-color:var(--ok)}.chip.st-unpublished,.chip.st-archived{color:var(--text-faint);border-style:dashed}.lms-table{width:100%;border-collapse:collapse;font-size:13px}.lms-table th{text-align:left;font-size:10.5px;text-transform:uppercase;letter-spacing:.07em;color:var(--text-faint);font-weight:650;padding:10px 14px;border-bottom:1px solid var(--border);background:var(--bg-inset);position:sticky;top:0;z-index:1}.lms-table td{padding:10px 14px;border-bottom:1px solid var(--border);vertical-align:middle}.lms-table tr:last-child td{border-bottom:none}.lms-table tbody tr:hover td{background:var(--bg-inset)}.lms-table td.r,.lms-table th.r{text-align:right;font-variant-numeric:tabular-nums}.lms-table-wrap{overflow-x:auto}.lms-empty{text-align:center;padding:48px 24px;color:var(--text-dim)}.lms-empty-icon{font-size:34px;opacity:.45;margin-bottom:12px}.lms-empty-title{font-size:15px;font-weight:620;color:var(--text);margin-bottom:6px}.lms-empty-body{font-size:13px;max-width:46ch;margin:0 auto 16px}.lms-error{border:1px solid var(--danger);border-left-width:3px;background:color-mix(in srgb,var(--danger) 8%,var(--bg-raised));color:var(--text);padding:12px 14px;border-radius:var(--radius);font-size:13px;display:flex;gap:12px;align-items:flex-start}.lms-error-title{font-weight:620;margin-bottom:3px}.lms-error pre{margin:6px 0 0;white-space:pre-wrap;font-size:12px;font-family:var(--mono);color:var(--text-dim)}.lms-toast-host{position:fixed;bottom:20px;right:20px;z-index:200;display:flex;flex-direction:column;gap:8px;max-width:min(400px,calc(100vw - 40px))}.lms-toast{background:var(--bg-raised);border:1px solid var(--border-strong);border-left:3px solid var(--accent);border-radius:var(--radius);padding:11px 14px;font-size:13px;box-shadow:0 6px 24px #00000030;animation:lms-slide .18s ease}.lms-toast.success{border-left-color:var(--ok)}.lms-toast.error{border-left-color:var(--danger)}.lms-toast.warning{border-left-color:var(--warn)}.lms-toast-title{font-weight:620}.lms-toast-body{color:var(--text-dim);margin-top:2px}@keyframes lms-slide{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}.skel{background:linear-gradient(90deg,var(--bg-inset) 25%,var(--bg-hover) 37%,var(--bg-inset) 63%);background-size:400% 100%;animation:lms-shimmer 1.3s ease infinite;border-radius:5px;height:14px}.skel.tall{height:150px;border-radius:var(--radius)}.skel.line{margin-bottom:8px}.skel.w60{width:60%}.skel.w40{width:40%}.skel.w80{width:80%}@keyframes lms-shimmer{0%{background-position:100% 50%}to{background-position:0 50%}}.lms-backdrop{position:fixed;inset:0;background:#0009;z-index:100;display:grid;place-items:center;padding:20px;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}.lms-modal{background:var(--bg-raised);border:1px solid var(--border);border-radius:var(--radius);width:min(560px,100%);max-height:88vh;display:flex;flex-direction:column;box-shadow:0 20px 60px #00000050}.lms-modal-head{padding:16px 20px;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;gap:12px}.lms-modal-title{font-size:16px;font-weight:640}.lms-modal-body{padding:20px;overflow-y:auto}.lms-modal-foot{padding:14px 20px;border-top:1px solid var(--border);display:flex;justify-content:flex-end;gap:8px}.dnd-item{display:flex;align-items:center;gap:10px;padding:9px 12px;background:var(--bg-raised);border:1px solid var(--border);border-radius:7px;margin-bottom:6px;font-size:13px}.dnd-item.dragging{opacity:.4}.dnd-item.over{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-dim)}.dnd-handle{cursor:grab;color:var(--text-faint);font-size:14px;-webkit-user-select:none;user-select:none;flex:0 0 auto;padding:0 2px}.dnd-handle:active{cursor:grabbing}.dnd-actions{margin-left:auto;display:flex;gap:4px;opacity:0;transition:opacity .1s}.dnd-item:hover .dnd-actions,.dnd-item:focus-within .dnd-actions{opacity:1}.dropzone{border:2px dashed var(--border-strong);border-radius:var(--radius);padding:32px 20px;text-align:center;color:var(--text-dim);cursor:pointer;background:var(--bg-inset)}.dropzone:hover,.dropzone.over{border-color:var(--accent);color:var(--accent)}.upload-row{display:flex;align-items:center;gap:12px;padding:10px 12px;border:1px solid var(--border);border-radius:7px;margin-top:8px;font-size:13px}.upload-status{font-size:11.5px;font-weight:600;text-transform:uppercase;letter-spacing:.05em}.upload-status.uploading{color:var(--accent)}.upload-status.processing{color:var(--warn)}.upload-status.ready{color:var(--ok)}.upload-status.failed{color:var(--danger)}.muted{color:var(--text-dim)}.faint2{color:var(--text-faint)}.tnum{font-variant-numeric:tabular-nums}.stack{display:flex;flex-direction:column}.stack.g4{gap:4px}.stack.g8{gap:8px}.stack.g12{gap:12px}.stack.g16{gap:16px}.hrow{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.hrow.g4{gap:4px}.hrow.g6{gap:6px}.avatar{width:32px;height:32px;border-radius:50%;background:var(--accent-dim);color:var(--accent);display:grid;place-items:center;font-size:12.5px;font-weight:650;flex:0 0 auto;overflow:hidden}.avatar img{width:100%;height:100%;object-fit:cover}.avatar.lg{width:48px;height:48px;font-size:17px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media(max-width:1000px){.player-body{flex-direction:column}.player-side{width:100%;flex:none;border-left:none;border-top:1px solid #232830;max-height:none}}@media(max-width:860px){.lms-shell{flex-direction:column}.lms-nav{width:100%;flex:none;height:auto;position:sticky;top:0;flex-direction:row;align-items:center;overflow-x:auto;border-right:none;border-bottom:1px solid var(--border);padding:6px 0;gap:2px}.lms-brand,.lms-nav-group{display:none}.lms-nav-link{margin:0 4px;white-space:nowrap;padding:7px 12px;flex:0 0 auto}.lms-nav>div:last-child{border-top:none!important;margin-top:0!important;padding:0 10px!important;flex:0 0 auto}.lms-nav>div:last-child .hrow:first-child{display:none}.lms-content{padding:16px 14px 56px}.lms-topbar{padding:10px 14px}.lms-page-title{font-size:19px}.lms-grid.courses{grid-template-columns:repeat(auto-fill,minmax(160px,1fr))}.course-title{font-size:13.5px}.lms-modal{width:100%;max-height:92vh}.player-bar{padding:8px 12px;font-size:12px}.player-article{padding:18px 16px;font-size:14.5px}}@media(prefers-reduced-motion:reduce){.skel,.chip.live:before{animation:none}.course-card,.progress>span,.lms-toast{transition:none;animation:none}}.player-side,.player-main{color-scheme:dark}.embed-source{padding:10px 16px;margin:0;font-size:13px}.embed-source a{color:#9aa4b2}.embed-source a:hover{color:#e6ebf2}.live-window{border:1px solid var(--border);border-radius:10px;padding:12px 14px;margin-bottom:16px;background:var(--bg-inset)}.live-window.open{border-color:var(--ok)}.live-window p{margin:4px 0 0}.lms-table tr.you{background:var(--bg-inset);font-weight:600}.faint{color:var(--text-dim)}.hrow.between{justify-content:space-between;width:100%}.hrow.g12{gap:12px}.hrow.g16{gap:16px}.stack.g6{gap:6px}.lms-section-title{font-size:15px;font-weight:620;margin:24px 0 10px}.lms-note{margin:12px 0 0;padding:10px 12px;font-size:13px;line-height:1.5;border-radius:8px;background:var(--bg-inset);color:var(--text-dim)}.lms-note.warn{color:var(--warn);border-left:3px solid currentColor}.lms-table .num{text-align:right;font-variant-numeric:tabular-nums}.lms-field .req{color:var(--danger);margin-left:2px}.lesson-text{line-height:1.65;color:#c8cfda;max-width:78ch}.lesson-text h1,.lesson-text h2,.lesson-text h3{color:#e5e9ef;margin:1.2em 0 .5em;line-height:1.25}.lesson-text p{margin:0 0 .9em}.lesson-text ul,.lesson-text ol{padding-left:1.4em;margin:0 0 .9em}.lesson-text a{color:#7fb1ff}.lesson-text img{max-width:100%;border-radius:8px}.lesson-text pre{background:#0e1116;border:1px solid #232830;border-radius:10px;padding:12px 14px;overflow-x:auto;font-size:13px}.lesson-text code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.92em}.lesson-text blockquote{border-left:3px solid #3a4250;margin:0 0 .9em;padding:2px 14px;color:#9aa4b2}.lesson-text table{border-collapse:collapse;margin:0 0 .9em}.lesson-text td,.lesson-text th{border:1px solid #232830;padding:6px 10px}.lms-card .lesson-text,.lms-card .lesson-text h1,.lms-card .lesson-text h2,.lms-card .lesson-text h3{color:inherit}.pdf-viewer{display:flex;flex-direction:column;height:calc(100vh - 260px);min-height:420px;background:#0e1116}.pdf-stage{flex:1;min-height:0;display:flex;align-items:center;justify-content:center;gap:8px;padding:12px}.pdf-nav{font-size:26px;padding:4px 10px;align-self:center}.pdf-page{position:relative;display:inline-block;max-width:100%;overflow:hidden}.pdf-page canvas{display:block;max-width:100%;background:#fff;border-radius:6px;box-shadow:0 6px 24px #0006}.pdf-watermark{color:#334155;text-shadow:0 1px 2px rgba(255,255,255,.5)}.pdf-foot{text-align:center;font-size:12px;font-weight:600;color:#9aa4b2;padding:8px;border-top:1px solid #232830}.file-code{background:#0e1116;border:1px solid #232830;border-radius:10px;padding:12px 16px;overflow-x:auto;font-size:13px;line-height:1.55;tab-size:4;margin:8px 0 0}.nb{border:1px solid #232830;border-radius:10px;overflow:hidden;margin-top:8px}.nb-md{padding:12px 16px;border-bottom:1px solid #232830}.nb-code{display:flex;gap:10px;padding:10px 12px;background:#0e1116;border-bottom:1px solid #232830}.nb-code pre{margin:0;flex:1;overflow-x:auto;font-size:13px}.nb-count{color:#646e7d;font-family:ui-monospace,Menlo,monospace;font-size:12px;white-space:nowrap}.nb-out{margin:0;padding:8px 12px 8px 54px;font-size:12.5px;color:#c8cfda;border-bottom:1px solid #232830;white-space:pre-wrap}.nb-err{color:#ff8a8a}.cb-layout{display:grid;grid-template-columns:260px minmax(0,1fr);gap:16px;align-items:start}.cb-layout.rail-open{grid-template-columns:260px minmax(0,1fr) 240px}.cb-modules,.cb-rail{position:sticky;top:12px}.cb-col-head{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:0 4px 10px}.ui-label{font-size:11px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--muted, #8b95a5)}.cb-module{display:flex;align-items:center;gap:8px;padding:10px;border:1px solid var(--border);border-radius:12px;background:var(--surface, transparent);margin-bottom:6px;cursor:pointer}.cb-module.active{border-color:var(--brand, #2c5fd4);box-shadow:0 0 0 2px #2c5fd426}.cb-module.over{outline:2px dashed var(--brand, #2c5fd4)}.cb-module-title{font-weight:620;font-size:13.5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.cb-module-actions{display:none;gap:2px}.cb-module:hover .cb-module-actions{display:flex}.cb-lesson{border:1px solid var(--border);border-radius:14px;background:var(--surface, transparent);transition:border-color .15s,box-shadow .15s}.cb-lesson:hover{border-color:var(--brand, #2c5fd4)}.cb-lesson.expanded{border-color:var(--brand, #2c5fd4);box-shadow:0 0 0 3px #2c5fd41f}.cb-lesson.dragging{opacity:.5}.cb-lesson.over{outline:2px dashed var(--brand, #2c5fd4)}.cb-lesson-row{display:flex;align-items:center;gap:12px;padding:12px 14px}.cb-kind{width:36px;height:36px;border-radius:10px;display:grid;place-items:center;background:color-mix(in srgb,currentColor 12%,transparent);font-size:16px;flex:none}.cb-title{width:100%;border:0;background:transparent;font:inherit;font-weight:640;font-size:14px;color:inherit;padding:0;outline:none}.cb-title:focus{box-shadow:0 1px 0 var(--brand, #2c5fd4)}.cb-meta{display:flex;gap:10px;margin-top:2px;font-size:11px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--muted, #8b95a5)}.cb-meta .ok{color:var(--ok, #16a34a)}.cb-meta .warn{color:#d97706}.cb-actions{display:none;gap:2px}.cb-lesson:hover .cb-actions,.cb-lesson.expanded .cb-actions{display:flex}.cb-chevron{width:36px;height:36px;border-radius:10px;border:0;background:color-mix(in srgb,currentColor 8%,transparent);color:inherit;font-size:20px;cursor:pointer;transition:transform .2s,background .15s;flex:none}.cb-chevron.on{background:var(--brand, #2c5fd4);color:#fff;transform:rotate(180deg)}.cb-editor{border-top:1px solid var(--border);padding:16px 18px 20px;display:flex;flex-direction:column;gap:14px;background:color-mix(in srgb,currentColor 3%,transparent);border-radius:0 0 14px 14px}.cb-attached{display:flex;align-items:center;gap:10px;padding:10px 12px;border:1px solid var(--border);border-radius:12px;font-size:13px}.cb-attached.ok{border-color:color-mix(in srgb,#16a34a 40%,transparent);background:color-mix(in srgb,#16a34a 8%,transparent)}.cb-check{width:26px;height:26px;border-radius:50%;background:#16a34a;color:#fff;display:grid;place-items:center;font-size:13px;flex:none}.cb-add{display:flex;flex-wrap:wrap;align-items:center;gap:6px;margin-top:14px;padding:12px 14px;border:1px dashed var(--border);border-radius:14px}.cb-rail-module{font-size:11px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--muted, #8b95a5);padding:10px 6px 4px;cursor:pointer}.cb-rail-lesson{display:flex;align-items:center;gap:8px;padding:6px 8px;border-radius:8px;font-size:12.5px;cursor:pointer}.cb-rail-lesson:hover,.cb-rail-lesson.current{background:color-mix(in srgb,var(--brand, #2c5fd4) 12%,transparent)}@media(max-width:1000px){.cb-layout,.cb-layout.rail-open{grid-template-columns:1fr}.cb-modules,.cb-rail{position:static}}.nc-section{padding:14px 0;border-top:1px solid var(--border)}.nc-section:first-child{padding-top:0;border-top:0}.nc-section-title{font-size:11px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--muted, #8b95a5);margin-bottom:10px}.cfg{padding:10px 6px 14px}.cfg-head{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px 20px;align-items:flex-start;padding-bottom:12px}.cfg .nc-section:first-of-type{border-top:1px solid var(--border);padding-top:14px}:root{--bg: #0b0d10;--bg-raised: #12151a;--bg-inset: #0e1116;--bg-hover: #1a1f26;--border: #232830;--border-strong: #333a45;--text: #e5e9ef;--text-dim: #9aa4b2;--text-faint: #646e7d;--accent: #4c8dff;--accent-dim: #24395e;--measured: #35c98a;--derived: #d9a441;--simulated: #b57ce0;--unavailable: #646e7d;--danger: #f2565b;--warn: #e0a33a;--ok: #35c98a;--mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Code", Menlo, Consolas, monospace;--sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--radius: 4px;color-scheme:dark}*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:var(--sans);font-size:14px;line-height:1.45;-webkit-font-smoothing:antialiased}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.shell{display:flex;min-height:100vh}.sidebar{width:216px;flex:0 0 216px;background:var(--bg-raised);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:12px 0}.main{flex:1;min-width:0;display:flex;flex-direction:column}.content{padding:20px 24px 48px;max-width:1600px}.brand{padding:4px 16px 14px;border-bottom:1px solid var(--border);margin-bottom:10px}.brand-title{font-weight:650;font-size:13px;letter-spacing:.02em}.brand-sub{font-size:11px;color:var(--text-faint);font-family:var(--mono)}.nav-group{padding:10px 16px 4px;font-size:10px;text-transform:uppercase;letter-spacing:.09em;color:var(--text-faint)}.nav-link{display:flex;align-items:center;gap:8px;padding:6px 16px;color:var(--text-dim);font-size:13px;cursor:pointer;border-left:2px solid transparent}.nav-link:hover{background:var(--bg-hover);color:var(--text);text-decoration:none}.nav-link.active{color:var(--text);border-left-color:var(--accent);background:var(--bg-inset)}.topbar{display:flex;align-items:center;gap:14px;flex-wrap:wrap;padding:10px 24px;border-bottom:1px solid var(--border);background:var(--bg-raised);position:sticky;top:0;z-index:20}h1{font-size:19px;font-weight:620;margin:0 0 4px}h2{font-size:15px;font-weight:600;margin:22px 0 10px}h3{font-size:13px;font-weight:600;margin:16px 0 8px;color:var(--text-dim)}.page-sub{color:var(--text-dim);font-size:13px;margin:0 0 18px;max-width:96ch}.mono,.num{font-family:var(--mono);font-variant-numeric:tabular-nums}.dim{color:var(--text-dim)}.faint{color:var(--text-faint)}.small{font-size:12px}.tiny{font-size:11px}.panel{background:var(--bg-raised);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:16px}.panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:9px 14px;border-bottom:1px solid var(--border);font-size:12px;font-weight:600;letter-spacing:.02em}.panel-body{padding:14px}.panel-body.tight{padding:8px 14px}.panel-body.flush{padding:0}.grid{display:grid;gap:16px}.grid.cols-2{grid-template-columns:repeat(auto-fit,minmax(340px,1fr))}.grid.cols-3{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}.grid.cols-4{grid-template-columns:repeat(auto-fit,minmax(190px,1fr))}.kpi{background:var(--bg-raised);border:1px solid var(--border);border-radius:var(--radius);padding:12px 14px}.kpi-label{font-size:10.5px;text-transform:uppercase;letter-spacing:.08em;color:var(--text-faint);margin-bottom:5px}.kpi-value{font-family:var(--mono);font-size:23px;font-weight:600;font-variant-numeric:tabular-nums;line-height:1.15}.kpi-sub{font-size:11.5px;color:var(--text-dim);margin-top:3px;font-family:var(--mono)}.prov{display:inline-flex;align-items:center;gap:4px;font-size:10px;font-family:var(--mono);text-transform:uppercase;letter-spacing:.05em;padding:1px 5px;border-radius:2px;border:1px solid currentColor;white-space:nowrap}.prov:before{content:"";width:5px;height:5px;border-radius:50%;background:currentColor}.prov-provider-metered,.prov-self-metered{color:var(--measured)}.prov-derived{color:var(--derived)}.prov-simulated{color:var(--simulated)}.pill{display:inline-flex;align-items:center;gap:5px;font-size:11px;font-family:var(--mono);padding:2px 7px;border-radius:10px;border:1px solid var(--border-strong);color:var(--text-dim);white-space:nowrap}.pill.ready,.pill.live,.pill.healthy{color:var(--ok);border-color:#1d4a37;background:#10231b}.pill.warn,.pill.degraded{color:var(--warn);border-color:#4a3a16;background:#221b0e}.pill.bad,.pill.down{color:var(--danger);border-color:#4d2124;background:#241113}.pill.off{color:var(--text-faint)}.dot{width:7px;height:7px;border-radius:50%;background:currentColor;flex:0 0 7px}.live-badge{color:var(--danger);font-family:var(--mono);font-weight:600;display:inline-flex;align-items:center;gap:6px}.live-badge .dot{animation:pulse 1.6s ease-in-out infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.25}}button,.btn{font-family:var(--sans);font-size:12.5px;padding:6px 12px;background:var(--bg-hover);color:var(--text);border:1px solid var(--border-strong);border-radius:var(--radius);cursor:pointer;white-space:nowrap}button:hover:not(:disabled),.btn:hover{background:#222831;border-color:#45505e}button:disabled{opacity:.42;cursor:not-allowed}button.primary{background:var(--accent-dim);border-color:#35558c;color:#cfe0ff}button.primary:hover:not(:disabled){background:#2b4570}button.danger{background:#2a1417;border-color:#58272b;color:#ffb9bc}button.danger:hover:not(:disabled){background:#3a1b1f}button.small{padding:3px 8px;font-size:11.5px}input,select,textarea{font-family:var(--sans);font-size:13px;padding:6px 9px;background:var(--bg-inset);color:var(--text);border:1px solid var(--border-strong);border-radius:var(--radius)}input:focus,select:focus,textarea:focus{outline:1px solid var(--accent);border-color:var(--accent)}input.num,input[type=number]{font-family:var(--mono)}label{display:block;font-size:11px;color:var(--text-dim);margin-bottom:4px}.field{margin-bottom:12px}.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}table{width:100%;border-collapse:collapse;font-size:12.5px}th{text-align:left;font-size:10.5px;text-transform:uppercase;letter-spacing:.07em;color:var(--text-faint);font-weight:600;padding:7px 10px;border-bottom:1px solid var(--border);position:sticky;top:0;background:var(--bg-raised)}td{padding:6px 10px;border-bottom:1px solid #1a1e25;vertical-align:middle}tr:hover td{background:var(--bg-inset)}td.r,th.r{text-align:right;font-family:var(--mono);font-variant-numeric:tabular-nums}.table-wrap{overflow-x:auto}tr.is-current td{background:#141c2b}.stage{background:#000;border:1px solid var(--border);border-radius:var(--radius);position:relative;aspect-ratio:16 / 9;overflow:hidden}.stage video{width:100%;height:100%;object-fit:contain;display:block;background:#000}.stage-empty{position:absolute;inset:0;display:grid;place-items:center;color:var(--text-faint);font-size:13px;text-align:center;padding:24px}.stage-overlay{position:absolute;top:8px;left:10px;display:flex;gap:8px;font-family:var(--mono);font-size:11px}.stage-tag{background:#000000b0;padding:2px 7px;border-radius:2px;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}.tile-grid{display:grid;gap:8px;grid-template-columns:repeat(auto-fill,minmax(180px,1fr))}.tile{background:#000;border:1px solid var(--border);border-radius:var(--radius);aspect-ratio:16/9;position:relative;overflow:hidden}.tile video{width:100%;height:100%;object-fit:cover}.tile-name{position:absolute;bottom:0;left:0;right:0;padding:3px 6px;background:#000000c0;font-size:10.5px;font-family:var(--mono);display:flex;justify-content:space-between;gap:6px}.scroll{overflow-y:auto}.chat-log{display:flex;flex-direction:column;gap:7px;padding:10px 12px}.chat-msg{font-size:12.5px;line-height:1.4}.chat-who{font-weight:600;font-size:11.5px}.chat-who.teacher{color:var(--accent)}.chat-time{color:var(--text-faint);font-size:10px;font-family:var(--mono);margin-left:5px}.chat-deleted{color:var(--text-faint);font-style:italic}.plist{display:flex;flex-direction:column}.prow{display:flex;align-items:center;gap:8px;padding:5px 12px;border-bottom:1px solid #1a1e25;font-size:12.5px}.prow:hover{background:var(--bg-inset)}.prow-name{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.prow-icons{display:flex;gap:5px;font-size:11px;font-family:var(--mono);color:var(--text-faint)}.prow-actions{display:flex;gap:4px;opacity:0}.prow:hover .prow-actions{opacity:1}.tabs{display:flex;gap:2px;border-bottom:1px solid var(--border);padding:0 8px}.tab{padding:7px 12px;font-size:12.5px;color:var(--text-dim);cursor:pointer;border-bottom:2px solid transparent}button.tab{background:none;border:0;border-bottom:2px solid transparent;border-radius:0;font:inherit;font-size:12.5px}.tab:hover{color:var(--text)}.tab.active{color:var(--text);border-bottom-color:var(--accent)}.tab-count{font-family:var(--mono);font-size:10.5px;color:var(--text-faint);margin-left:4px}.notice{border:1px solid var(--border-strong);border-left-width:3px;border-radius:var(--radius);padding:9px 12px;font-size:12.5px;margin-bottom:14px;background:var(--bg-inset);color:var(--text-dim)}.notice strong{color:var(--text)}.notice.info{border-left-color:var(--accent)}.notice.warn{border-left-color:var(--warn)}.notice.danger{border-left-color:var(--danger)}.notice.sim{border-left-color:var(--simulated)}.chart{width:100%;display:block}.chart-axis{stroke:var(--border);stroke-width:1}.chart-grid{stroke:#1a1e25;stroke-width:1}.chart-label{fill:var(--text-faint);font-size:9.5px;font-family:var(--mono)}.arch{display:flex;flex-direction:column;gap:0;align-items:stretch}.arch-node{border:1px solid var(--border-strong);border-radius:var(--radius);background:var(--bg-inset);padding:9px 12px}.arch-node.media{border-color:#2c4a6b}.arch-node.control{border-color:#4a3a16}.arch-node.external{border-color:#45364f;border-style:dashed}.arch-node.cdn{border-color:#1d4a37}.arch-label{font-size:12.5px;font-weight:600}.arch-sub{font-size:11px;color:var(--text-faint)}.arch-metrics{display:flex;flex-wrap:wrap;gap:4px 14px;margin-top:6px;font-family:var(--mono);font-size:11px}.arch-metric .mv{color:var(--measured)}.arch-metric .mv.na{color:var(--unavailable);font-style:italic}.arch-arrow{text-align:center;color:var(--text-faint);font-size:11px;font-family:var(--mono);padding:5px 0}.spacer{flex:1}.hidden{display:none!important}.copy-row{display:flex;gap:6px;align-items:center}.copy-row input{flex:1;font-family:var(--mono);font-size:11.5px}.loading{color:var(--text-faint);font-size:12.5px;padding:14px;font-family:var(--mono)}.error-box{border:1px solid #58272b;background:#1d1113;color:#ffb9bc;padding:9px 12px;border-radius:var(--radius);font-size:12.5px;margin-bottom:14px}.bar{height:6px;background:var(--bg-inset);border-radius:3px;overflow:hidden}.bar>span{display:block;height:100%;background:var(--accent)}.bar.ok>span{background:var(--ok)}.bar.warn>span{background:var(--warn)}.bar.bad>span{background:var(--danger)}@media(max-width:860px){.shell{flex-direction:column}.sidebar{width:100%;flex:none;flex-direction:row;overflow-x:auto;border-right:none;border-bottom:1px solid var(--border);padding:0}.brand,.nav-group{display:none}.nav-link{border-left:none;border-bottom:2px solid transparent;white-space:nowrap}.nav-link.active{border-left:none;border-bottom-color:var(--accent)}.content{padding:14px 12px 40px}}