:root{--bg:#0b0b0e;--surface:#17181c;--raised:#212228;--raised-2:#2a2b33;--line:#2c2d34;--line-soft:#232429;--text:#f2f2f5;--text-2:#b6b6c1;--muted:#8b8b98;--accent:#2563eb;--accent-hot:#4b86f5;--accent-text:#8ec2ff;--accent-ink:#ffffff;--accent-soft:rgba(37,99,235,0.18);--good:#3ddc97;--good-soft:rgba(61,220,151,0.12);--warn:#f5a524;--warn-soft:rgba(245,165,36,0.13);--danger:#ff5c7f;--danger-soft:rgba(255,92,127,0.13);--danger-solid:#c01743;--shadow:0 1px 2px rgba(0,0,0,0.4),0 8px 24px rgba(0,0,0,0.28);--r-sm:6px;--r-md:10px;--r-lg:14px;--r-pill:999px;--topbar:60px;--sans:ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI","Helvetica Neue",Arial,sans-serif}@media (prefers-color-scheme:light){:root{--bg:#f4f4f7;--surface:#ffffff;--raised:#ffffff;--raised-2:#eeeef3;--line:#e2e2ea;--line-soft:#ececf2;--text:#16161c;--text-2:#45454f;--muted:#6f6f7d;--accent:#0f5bd1;--accent-hot:#1d6ae5;--accent-text:#0f5bd1;--accent-soft:rgba(15,91,209,0.1);--good:#0f7a52;--good-soft:rgba(15,122,82,0.12);--warn:#8a5200;--warn-soft:rgba(138,82,0,0.13);--danger:#c01743;--danger-soft:rgba(192,23,67,0.13);--shadow:0 1px 2px rgba(20,20,35,0.06),0 8px 24px rgba(20,20,35,0.06)}}:root[data-theme=dark]{--bg:#0b0b0e;--surface:#17181c;--raised:#212228;--raised-2:#2a2b33;--line:#2c2d34;--line-soft:#232429;--text:#f2f2f5;--text-2:#b6b6c1;--muted:#8b8b98;--accent:#2563eb;--accent-hot:#4b86f5;--accent-text:#8ec2ff;--accent-soft:rgba(37,99,235,0.18);--good:#3ddc97;--good-soft:rgba(61,220,151,0.12);--warn:#f5a524;--warn-soft:rgba(245,165,36,0.13);--danger:#ff5c7f;--danger-soft:rgba(255,92,127,0.13);--shadow:0 1px 2px rgba(0,0,0,0.4),0 8px 24px rgba(0,0,0,0.28)}:root[data-theme=light]{--bg:#f4f4f7;--surface:#ffffff;--raised:#ffffff;--raised-2:#eeeef3;--line:#e2e2ea;--line-soft:#ececf2;--text:#16161c;--text-2:#45454f;--muted:#6f6f7d;--accent:#0f5bd1;--accent-hot:#1d6ae5;--accent-text:#0f5bd1;--accent-soft:rgba(15,91,209,0.1);--good:#0f7a52;--good-soft:rgba(15,122,82,0.12);--warn:#8a5200;--warn-soft:rgba(138,82,0,0.13);--danger:#c01743;--danger-soft:rgba(192,23,67,0.13);--shadow:0 1px 2px rgba(20,20,35,0.06),0 8px 24px rgba(20,20,35,0.06)}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:var(--bg);color:var(--text);font-family:var(--sans);font-size:15px;line-height:1.5;-webkit-font-smoothing:antialiased}a{text-decoration:none}a,button{color:inherit}button{font:inherit;background:none;border:0;cursor:pointer}:focus-visible{outline:2px solid var(--accent-hot);outline-offset:2px;border-radius:4px}svg{display:block}.srOnly{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}.topbar{position:-webkit-sticky;position:sticky;top:0;z-index:20;height:var(--topbar);gap:18px;padding:0 20px;background:var(--surface);border-bottom:1px solid var(--line)}.brand,.topbar{display:flex;align-items:center}.brand{gap:10px;font-weight:600;letter-spacing:-.015em}.brandMark{width:30px;height:30px;border-radius:8px;display:grid;place-items:center;background:linear-gradient(150deg,var(--accent-hot),var(--accent));color:#fff;font-size:12px;font-weight:700}.mainNav{display:flex;gap:4px;margin:0 auto}.navLink{padding:7px 16px;border-radius:var(--r-pill);color:var(--text-2);font-size:14px;font-weight:500;transition:background .15s,color .15s}.navLink:hover{background:var(--raised);color:var(--text)}.navLink[aria-current=page]{background:var(--accent);color:var(--accent-ink)}.topbarRight{display:flex;align-items:center;gap:8px}.iconBtn{width:34px;height:34px;border-radius:var(--r-md);display:grid;place-items:center;color:var(--text-2)}.iconBtn:hover{background:var(--raised);color:var(--text)}.avatar{width:32px;height:32px;border-radius:var(--r-pill);display:grid;place-items:center;background:linear-gradient(150deg,var(--accent-hot),var(--accent));color:#fff;font-size:13px;font-weight:600}.wrap{width:min(1180px,calc(100% - 40px));margin:0 auto;padding:28px 0 72px}.wrapNarrow{width:min(860px,calc(100% - 40px))}.pageTitle{margin:0;font-size:27px;font-weight:700;letter-spacing:-.03em;text-wrap:balance}.pageSub{margin:6px 0 0;color:var(--muted);font-size:14px}.sectionTitle{margin:34px 0 14px;font-size:19px;font-weight:600;letter-spacing:-.02em}.eyebrow{font-size:11px;font-weight:600;letter-spacing:.085em;text-transform:uppercase;color:var(--muted)}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 20px;border-radius:var(--r-pill);background:var(--accent);color:var(--accent-ink);font-size:14px;font-weight:600;transition:background .15s}.btn:hover:not(:disabled){background:var(--accent-hot)}.btn:disabled{opacity:.55;cursor:not-allowed}.btnGhost{background:var(--raised);color:var(--text);border:1px solid var(--line)}.btnGhost:hover:not(:disabled){background:var(--raised-2)}.btnBlock{width:100%}.pill{display:inline-flex;align-items:center;gap:6px;padding:4px 11px;border-radius:var(--r-pill);background:var(--raised);border:1px solid var(--line);font-size:12px;font-weight:500;color:var(--text-2)}.pillGood{background:var(--good-soft);color:var(--good)}.pillAccent,.pillGood{border-color:transparent}.pillAccent{background:var(--accent-soft);color:var(--accent-text)}.progress{height:6px;border-radius:var(--r-pill);background:var(--raised-2);overflow:hidden}.progress>span{display:block;height:100%;border-radius:inherit;background:var(--accent)}.notice{display:flex;gap:12px;align-items:flex-start;padding:14px 16px;border-radius:var(--r-md);font-size:14px;line-height:1.5}.noticeError{background:var(--danger-soft);color:var(--danger)}.noticeInfo{background:var(--accent-soft);color:var(--accent-text)}.empty{padding:48px 24px;text-align:center;color:var(--muted);font-size:14px}.authShell{min-height:100vh;display:grid;place-items:center;padding:32px 20px}.authCard{width:min(430px,100%);padding:32px}.authTitle{margin:22px 0 6px;font-size:25px;font-weight:700;letter-spacing:-.03em}.authLead{margin:0 0 26px;color:var(--muted);font-size:14.5px}.field{display:grid;grid-gap:7px;gap:7px;margin-bottom:18px}.field label{font-size:13px;font-weight:600}.field input{padding:11px 14px;border-radius:var(--r-md);background:var(--raised);border:1px solid var(--line);color:var(--text);font:inherit;font-size:15px}.field input:focus{outline:none;border-color:var(--accent)}.field input[aria-invalid=true]{border-color:var(--danger)}.fieldError{font-size:12.5px;color:var(--danger)}.authHint{margin-top:22px;padding-top:18px;border-top:1px solid var(--line-soft);font-size:12.5px;color:var(--muted);line-height:1.6}.authHint code{color:var(--text-2)}.courseGrid{display:grid;grid-gap:20px;gap:20px;grid-template-columns:repeat(auto-fill,minmax(250px,1fr))}.courseCard{overflow:hidden;display:flex;flex-direction:column;transition:border-color .15s,transform .15s}.courseCard:hover{border-color:var(--accent);transform:translateY(-2px)}.cover{aspect-ratio:16/9;padding:18px;display:grid;align-content:center;background:linear-gradient(155deg,#23242e,#0c0c11);border-bottom:1px solid var(--line)}.coverText{font-size:20px;font-weight:700;line-height:1.12;letter-spacing:-.03em;text-transform:uppercase;background:linear-gradient(180deg,#ffffff 25%,#8e8e9c);-webkit-background-clip:text;background-clip:text;color:transparent}.courseBody{display:flex;flex-direction:column;flex:1 1;padding:14px 16px 16px}.courseName{font-size:15.5px;font-weight:600;letter-spacing:-.01em}.courseDesc{margin:8px 0 0;font-size:13.5px;color:var(--text-2);line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.courseFoot{margin-top:auto;padding-top:14px}.courseStats{display:flex;justify-content:space-between;align-items:center;margin-top:9px;font-size:12.5px;color:var(--muted);font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.courseHeader{display:flex;gap:22px;align-items:flex-start;flex-wrap:wrap;margin-bottom:26px}.courseHeaderMain{flex:1 1;min-width:260px}.progressCard{padding:18px}.progressTop{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:13px}.progressPct{font-size:17px;font-weight:700;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.moduleBlock{margin-bottom:12px}.moduleBar{display:flex;align-items:center;gap:12px;padding:15px 18px;background:var(--raised);border-radius:var(--r-md) var(--r-md) 0 0;border:1px solid var(--line);border-bottom:1px solid transparent}.moduleBar h3{flex:1 1;margin:0;font-size:15.5px;font-weight:600;letter-spacing:-.01em}.moduleCount{font-size:12.5px;color:var(--muted);font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.lessonList{border:1px solid var(--line);border-top:0;border-radius:0 0 var(--r-md) var(--r-md);overflow:hidden}.lessonRow{display:flex;align-items:center;gap:13px;width:100%;padding:13px 18px;text-align:left;background:var(--surface);border-top:1px solid var(--line-soft);font-size:14.5px}.lessonRow:first-child{border-top:0}.lessonRow:hover{background:var(--raised)}.lessonName{flex:1 1}.lessonMeta{font-size:12.5px;color:var(--muted);font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.dot{width:17px;height:17px;flex:none;border-radius:var(--r-pill);border:2px solid var(--muted);background:var(--surface)}.dotDone{background:var(--good);border-color:var(--good)}.dotCurrent{border-color:var(--accent);box-shadow:inset 0 0 0 3px var(--accent)}.player{display:grid;grid-template-columns:minmax(0,1fr) 330px;min-height:calc(100vh - var(--topbar))}.playerMain{display:flex;flex-direction:column;min-width:0}.playerStage{flex:1 1;width:min(880px,100%);margin:0 auto;padding:28px 32px}.lessonCounter{font-size:13px;color:var(--muted);font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.lessonHeading{display:flex;align-items:flex-start;gap:20px;margin:6px 0 22px}.lessonHeading h1{flex:1 1;margin:0;font-size:26px;font-weight:600;letter-spacing:-.03em;text-wrap:balance}.navPair{display:flex;gap:8px;flex:none}.navSq{width:40px;height:34px;border-radius:var(--r-sm);border:1px solid var(--line);background:var(--raised);display:grid;place-items:center;color:var(--text-2)}.navSq:hover{color:var(--text);border-color:var(--accent)}.navSqDisabled{opacity:.35;pointer-events:none}.stage{position:relative;aspect-ratio:16/9;border-radius:var(--r-md);overflow:hidden;background:radial-gradient(75% 110% at 50% 42%,rgba(45,110,245,.55),transparent 68%),linear-gradient(180deg,#141b2b,#08080c);display:grid;place-items:center;padding:24px;text-align:center}.stageLabel{position:absolute;top:20px;left:24px;right:24px;text-align:left}.stageLabel h2{margin:0;font-size:20px;font-weight:700;letter-spacing:-.02em;color:#fff}.stageNote{color:rgba(255,255,255,.62);font-size:14px;max-width:46ch}.lessonText{margin-top:24px;color:var(--text-2);font-size:15px;line-height:1.7;max-width:65ch}.playerFoot{position:-webkit-sticky;position:sticky;bottom:0;display:grid;place-items:center;grid-gap:10px;gap:10px;padding:18px;border-top:1px solid var(--line)}.drawer,.playerFoot{background:var(--surface)}.drawer{border-left:1px solid var(--line)}.drawerTop{display:flex;align-items:center;padding:16px 18px;border-bottom:1px solid var(--line)}.drawerTop h2{margin:0;font-size:16px;font-weight:600;letter-spacing:-.015em}.drawerList{padding:10px 8px 40px}.drawerSection{padding:12px 10px 8px;font-size:13.5px;font-weight:600;letter-spacing:-.01em}.drawerLesson{display:flex;align-items:center;gap:11px;width:100%;padding:9px 10px;border-radius:var(--r-sm);text-align:left;font-size:13.5px;color:var(--text-2)}.drawerLesson:hover{background:var(--raised);color:var(--text)}.drawerLessonCurrent{background:var(--raised-2);color:var(--text);font-weight:500}.drawerLesson .lessonName{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.drawerLesson .dot{width:15px;height:15px}.statusGrid{display:grid;grid-gap:14px;gap:14px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}.statusCard{display:flex;gap:12px;align-items:flex-start;padding:16px}.statusCard h3{margin:0 0 4px;font-size:14.5px;font-weight:600}.statusCard p{margin:0;font-size:13px;color:var(--muted)}.statusCard small{display:block;margin-top:8px;font-size:12px;color:var(--text-2)}.statusDot{width:9px;height:9px;margin-top:6px;border-radius:var(--r-pill);background:var(--muted);flex:none}.statusDotReady{background:var(--good)}@media (max-width:900px){.player{grid-template-columns:minmax(0,1fr)}.drawer{border-left:0;border-top:1px solid var(--line)}.playerStage{padding:20px 16px}.mainNav{margin:0;overflow-x:auto;scrollbar-width:none}.mainNav::-webkit-scrollbar{display:none}.navLink{flex:none;padding:7px 12px;font-size:13px}.topbar{gap:12px;padding:0 12px}.wrap{padding:20px 0 56px}}@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}.pageHead{display:flex;align-items:flex-start;gap:16px;flex-wrap:wrap;margin-bottom:22px}.pageHeadMain{flex:1 1;min-width:240px}.toolbar{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-bottom:18px}.tableWrap{overflow-x:auto}table.data{width:100%;border-collapse:collapse;min-width:680px}table.data th{padding:11px 14px;text-align:left;white-space:nowrap;font-size:11px;font-weight:600;letter-spacing:.07em;text-transform:uppercase;color:var(--muted);border-bottom:1px solid var(--line)}table.data td{padding:13px 14px;border-bottom:1px solid var(--line-soft);font-size:14px}table.data tr:last-child td{border-bottom:0}table.data tbody tr:hover{background:var(--raised)}.num{text-align:right;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.cellTitle{font-weight:600}.cellSub{display:block;font-size:12.5px;color:var(--muted);margin-top:2px}.status{display:inline-flex;align-items:center;gap:6px;padding:3px 10px;border-radius:var(--r-pill);font-size:12px;font-weight:600;white-space:nowrap}.statusPublished{background:var(--good-soft);color:var(--good)}.statusDraft{background:var(--raised-2);color:var(--text-2)}.statusArchived{background:var(--warn-soft);color:var(--warn)}.statusRemoved{background:var(--danger-soft);color:var(--danger)}.miniTrack{display:inline-block;vertical-align:middle;width:80px;height:6px;border-radius:4px;background:var(--raised-2);overflow:hidden}.miniFill{display:block;height:100%;border-radius:4px;background:var(--accent)}.editorGrid{display:grid;grid-gap:20px;gap:20px;grid-template-columns:minmax(0,1fr)}.panel{padding:18px}.panelHead{display:flex;align-items:flex-start;gap:12px;margin-bottom:14px}.panelHead h2{flex:1 1;margin:0;font-size:16px;font-weight:600;letter-spacing:-.015em}.fieldRow{display:grid;grid-gap:14px;gap:14px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}.field select,.field textarea{padding:11px 14px;border-radius:var(--r-md);background:var(--raised);border:1px solid var(--line);color:var(--text);font:inherit;font-size:15px}.field textarea{min-height:90px;resize:vertical}.field select:focus,.field textarea:focus{outline:none;border-color:var(--accent)}.checkRow{display:flex;align-items:center;gap:8px;font-size:14px}.checkRow input{width:16px;height:16px;accent-color:var(--accent)}.moduleCard{border:1px solid var(--line);border-radius:var(--r-md);margin-bottom:14px;overflow:hidden}.moduleHead{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:13px 16px;background:var(--raised);border-bottom:1px solid var(--line)}.moduleHead h3{flex:1 1;margin:0;font-size:15px;font-weight:600;min-width:160px}.moduleBody{padding:4px 0}.lessonLine{display:flex;align-items:center;gap:12px;padding:10px 16px;border-top:1px solid var(--line-soft);font-size:14px}.lessonLine:first-child{border-top:0}.lessonLine .lessonTitle{flex:1 1}.inlineActions{display:flex;gap:6px}.btnTiny{padding:4px 10px;border-radius:var(--r-sm);border:1px solid var(--line);background:var(--raised);font-size:12px;font-weight:500;color:var(--text-2)}.btnTiny:hover:not(:disabled){color:var(--text);border-color:var(--accent)}.btnTiny:disabled{opacity:.4;cursor:not-allowed}.btnDanger{color:var(--danger)}.btnDanger:hover:not(:disabled){border-color:var(--danger);color:var(--danger)}.addForm{display:flex;gap:8px;flex-wrap:wrap;padding:12px 16px;border-top:1px solid var(--line-soft)}.addForm input,.addForm select{flex:1 1;min-width:140px;padding:8px 12px;border-radius:var(--r-sm);background:var(--surface);border:1px solid var(--line);color:var(--text);font:inherit;font-size:13.5px}.addForm input:focus,.addForm select:focus{outline:none;border-color:var(--accent)}.reasonList{margin:8px 0 0;padding-left:20px}.reasonList li{margin-top:4px}