:root{color-scheme:light dark;--bg:#f5f5f7;--surface:#fff;--ink:#19191c;--muted:#65656d;--border:#dcdce1;--wash:#ebebef;--accent:#25252a;--on-accent:#fff}*{box-sizing:border-box}body{margin:0;font:16px/1.5 system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;background:var(--bg);color:var(--ink)}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button,.button{border:0;border-radius:10px;background:var(--accent);color:var(--on-accent);padding:11px 18px;cursor:pointer;font-weight:600;display:inline-block}button:hover,.button:hover{opacity:.85}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--muted);outline-offset:3px}.shell{display:grid;grid-template-columns:240px minmax(0,1fr);min-height:100dvh}aside{border-right:1px solid var(--border);padding:30px 22px;display:flex;flex-direction:column;position:sticky;top:0;height:100dvh}.brand{font-size:24px;font-weight:750;letter-spacing:-1px;margin-bottom:35px}nav{display:grid;gap:7px}nav a{padding:11px 10px;border-radius:9px;font-weight:550}nav a:hover{background:var(--wash)}.identity{margin-top:auto;display:grid;gap:4px;font-size:14px}.identity span,.identity small{color:var(--muted)}.quiet{background:transparent;color:var(--muted);padding:9px 0}main{padding:40px clamp(22px,4vw,70px);min-width:0;max-width:1900px;width:100%}header{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:28px}h1{font-size:clamp(28px,3vw,42px);line-height:1.15;letter-spacing:-1.2px;margin:0 0 10px}h2{font-size:23px;line-height:1.3;letter-spacing:-.5px;margin:0 0 20px}h3{font-size:18px;line-height:1.35;margin:0}p{margin:0 0 16px}header p,.muted{color:var(--muted)}label{display:grid;gap:7px;font-size:14px;font-weight:600}input,select{width:100%;min-width:0;background:var(--surface);color:var(--ink);border:1px solid var(--border);border-radius:9px;padding:11px 12px}input[readonly]{font-weight:500}.search{width:min(300px,40%)}.empty{padding:65px 24px;background:var(--surface);border:1px solid var(--border);border-radius:18px;text-align:center}.empty p{max-width:520px;margin:0 auto 25px;color:var(--muted)}.book-icon{font-size:45px;margin-bottom:18px}.module{margin-bottom:34px}.lecture-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(245px,1fr));gap:20px}.lecture{background:var(--surface);border:1px solid var(--border);border-radius:14px;overflow:hidden;transition:transform .15s}.lecture:hover{transform:translateY(-3px)}.lecture-art{aspect-ratio:16/9;background:var(--wash);display:flex;align-items:center;justify-content:center;position:relative}.lecture-art>span{font-size:40px}.lecture-art b{position:absolute;bottom:10px;left:10px;font-size:12px;background:var(--surface);padding:4px 9px;border-radius:6px}.lecture-copy{padding:17px}.lecture-copy p{color:var(--muted);font-size:14px;margin:7px 0 0}.auth{max-width:430px;margin:9vh auto}.auth.wide{max-width:670px}.auth form{display:grid;gap:20px;margin:25px 0}.auth>label{margin:20px 0}.auth>p{color:var(--muted)}.error{color:#b52e2e}.panel{background:var(--surface);border:1px solid var(--border);border-radius:15px;padding:24px;margin-bottom:25px}.inline-form{display:flex;gap:15px;align-items:end;flex-wrap:wrap}.inline-form label{flex:1;min-width:190px}.panel>.muted{margin:15px 0 0;font-size:14px}.student-row{display:flex;align-items:center;gap:20px;padding:18px 0;border-top:1px solid var(--border)}.student-row>div:first-child{flex:1;min-width:0;overflow-wrap:anywhere}.student-row p{font-size:14px;color:var(--muted);margin:3px 0 0}.student-row>span{font-size:14px}.actions{display:flex;gap:8px}.secondary{background:var(--wash);color:var(--ink);font-size:14px}.count{font-size:16px;color:var(--muted);margin-left:8px}details{border-top:1px solid var(--border);padding:16px 0}summary{cursor:pointer;font-weight:600}.lecture-edit{display:grid;grid-template-columns:1fr 1fr 90px;gap:16px;padding-top:20px}.checkbox{display:flex;align-items:center}.checkbox input{width:auto}.back{font-size:14px;color:var(--muted);display:block;margin-bottom:20px}.watch-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:28px}.player-wrap{background:#080808;border-radius:14px;overflow:hidden}video{display:block;width:100%;max-height:72vh;aspect-ratio:16/9}.player-options{display:flex;justify-content:space-between;align-items:end;padding:18px 0;gap:15px}.player-options select{min-width:110px}.playlist a{display:block;padding:13px;border-radius:9px;margin-bottom:6px}.playlist a:hover,.playlist a.selected{background:var(--wash)}.playlist small{display:block;color:var(--muted)}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}[hidden]{display:none!important}@media(prefers-color-scheme:dark){:root{--bg:#171719;--surface:#222225;--ink:#f5f5f7;--muted:#a8a8b0;--border:#3c3c43;--wash:#303034;--accent:#f1f1f4;--on-accent:#19191c}.error{color:#ff9292}}@media(max-width:950px){.watch-layout{grid-template-columns:1fr}.playlist{max-height:320px;overflow:auto}.student-row{flex-wrap:wrap}.lecture-edit{grid-template-columns:1fr}.shell{grid-template-columns:190px minmax(0,1fr)}}@media(max-width:650px){.shell{display:block}aside{position:static;height:auto;padding:18px 20px;border-right:0;border-bottom:1px solid var(--border);display:flex;flex-direction:row;align-items:center;gap:15px;flex-wrap:wrap}.brand{margin:0;font-size:21px}nav{display:flex;font-size:14px}.identity{margin:0 0 0 auto}.identity>span,.identity>small{display:none}.identity form{display:none}main{padding:25px 18px}header{flex-wrap:wrap}.search{width:100%}.empty{padding:42px 18px}.actions{flex-wrap:wrap}.inline-form{display:grid}.lecture-grid{grid-template-columns:1fr}.auth{margin:5vh auto}}

.lecture-art img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain}.lecture-art>span{position:relative;background:var(--surface);border-radius:50%;width:52px;height:52px;text-align:center;line-height:47px;font-size:30px}.lecture-art b{z-index:1}

/* Sidebar contact and account controls. */
aside{border-right:0;background:var(--bg);box-shadow:8px 0 24px rgba(0,0,0,.09);z-index:2}.sidebar-bottom{margin-top:auto;display:grid;gap:24px}.identity{margin-top:0;padding-top:18px;border-top:1px solid var(--border)}.identity .quiet{padding:7px 0;text-align:left}.mentor-contact{display:grid;gap:10px;min-width:0}.mentor-contact p{font-size:13px;line-height:1.5;color:var(--muted);margin:0}.discord-contact{background:var(--wash);color:var(--ink);padding:11px 12px;display:grid;gap:2px;text-align:left;font-size:13px;font-weight:500}.discord-contact strong{font-size:15px}.email-contact{font-size:12px;overflow-wrap:anywhere;color:var(--muted)}.email-contact:hover{color:var(--ink)}.contact-status:empty{display:none}.contact-status{font-size:12px;color:var(--muted)}#search{transition:border-color .18s,box-shadow .18s,background .18s}#search:focus-visible{outline:none;border-color:var(--ink);box-shadow:0 3px 12px rgba(0,0,0,.12);background:var(--wash)}@media(prefers-color-scheme:dark){aside{box-shadow:8px 0 28px rgba(0,0,0,.28)}#search:focus-visible{box-shadow:0 3px 14px rgba(0,0,0,.24)}}@media(max-width:650px){aside{box-shadow:0 5px 18px rgba(0,0,0,.1)}.sidebar-bottom{width:100%;margin-top:8px;grid-template-columns:minmax(0,1fr) auto;align-items:end;gap:18px}.identity{margin:0;padding:0;border:0}.identity form{display:block}.mentor-contact{gap:6px}.mentor-contact p{font-size:12px}.discord-contact{max-width:220px}}

/* Compact lecture metadata, with full titles and durations retained. */
.lecture-grid{align-items:start}.lecture-copy{padding:11px 14px;display:flex;align-items:baseline;justify-content:space-between;gap:12px}.lecture-copy h3{flex:1;min-width:0;font-size:18px}.lecture-copy p{margin:0;flex:none;text-align:right;max-width:90px;font-size:14px}.lecture-art>.play-icon{display:grid;place-items:center;width:48px;height:48px;line-height:normal}.play-icon svg{display:block;width:26px;height:26px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linejoin:round}.player-options{justify-content:flex-start;flex-wrap:wrap;gap:18px}.player-options #complete{margin-left:auto}@media(max-width:650px){.lecture-copy h3{font-size:18px}.player-options{gap:12px}.player-options #complete{margin-left:0}}

.lecture-copy.long-title{display:block}.lecture-copy.long-title p{max-width:none;text-align:left;margin-top:4px}

.library-tools{justify-content:flex-end;margin-bottom:22px}.mentor-contact{gap:6px}.mentor-contact .contact-row{display:flex;align-items:center;gap:11px;width:100%;padding:12px 9px;border:0;border-radius:11px;background:transparent;color:var(--ink);text-align:left;opacity:1;transition:background .16s}.mentor-contact .contact-row:hover{background:var(--wash)}.contact-icon{width:23px;height:23px;flex:none}.discord-icon{fill:#5865f2}.mail-icon{fill:none;stroke:var(--muted);stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}.contact-copy{display:grid;gap:3px;min-width:0}.contact-label{font-size:12px;font-weight:500;color:var(--muted);line-height:1.2}.contact-copy strong{font-size:14px;font-weight:600;line-height:1.35;overflow-wrap:normal}.email-contact .contact-copy strong{font-size:13px;font-weight:500}.contact-status{padding:0 9px;font-size:12px}.sidebar-bottom{gap:18px}@media(max-width:650px){.mentor-contact{grid-template-columns:1fr}.mentor-contact .contact-row{padding:8px 6px}.contact-icon{width:21px;height:21px}.library-tools{margin-bottom:20px}}