:root{--ink:#132339;--muted:#526277;--blue:#164bdf;--line:#dbe2ed;--light:#f3f6fb;--nav:#101f38;--white:#fff;--radius:12px;color-scheme:light;font-family:Inter,Arial,Helvetica,sans-serif;font-size:16px}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;color:var(--ink);background:var(--white);line-height:1.6}a{color:var(--blue);text-underline-offset:4px}a:hover{text-decoration-thickness:2px}a:focus-visible,summary:focus-visible{outline:3px solid #f4ae2b;outline-offset:5px;border-radius:3px}.skip{position:fixed;top:-100px;left:16px;z-index:10;padding:12px;background:#fff}.skip:focus{top:16px}.sidebar{position:fixed;inset:0 auto 0 0;width:240px;background:var(--nav);color:#fff;padding:38px 28px;display:flex;flex-direction:column}.brand{font-size:27px;font-weight:800;letter-spacing:-1px;color:white;text-decoration:none}.brand span{color:#83aaff}.semester{color:#b6c6e0;margin:6px 0 40px;font-size:14px}.sidebar nav{display:grid;gap:8px}.sidebar nav 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var(--line);border-radius:var(--radius);padding:26px}.botbox ol{margin:20px 0;padding-left:24px;display:grid;gap:10px}.botbox code{font-size:14px;background:#e4eaf4;padding:3px 6px;border-radius:4px}.commands{display:flex;gap:10px 22px;flex-wrap:wrap;font-size:14px;padding-top:16px;border-top:1px solid var(--line)}.gradesbox{border-left:4px solid var(--blue);background:var(--light);padding:24px 28px}.gradesbox p{color:var(--muted);max-width:660px}.scorebar{display:grid;grid-template-columns:3fr 1fr 1fr;gap:5px;margin:22px 0}.scorebar div{background:var(--blue);color:#fff;padding:20px;border-radius:6px}.scorebar div:nth-child(2){background:#324e82}.scorebar div:nth-child(3){background:#132339}.scorebar strong{display:block;font-size:30px;line-height:1.2}.scorebar span{font-size:14px}.rules{display:grid;grid-template-columns:1fr 1fr;gap:28px;margin-top:25px}.rules p{color:var(--muted)}.tablewrap{overflow-x:auto}table{width:100%;border-collapse:collapse;font-size:15px}th,td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--line);vertical-align:top}th{background:var(--light);font-size:14px}details{border:1px solid var(--line);border-radius:8px;margin-top:15px;padding:16px 20px}summary{cursor:pointer;font-size:17px;font-weight:600}details ul{padding-left:20px;display:grid;gap:10px}.team{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.team p{color:var(--muted)}footer{border-top:1px solid var(--line);margin-top:50px;padding-top:20px;font-size:14px;color:var(--muted);display:flex;justify-content:space-between;gap:20px}.muted{color:var(--muted)}@media(min-width:1600px){main{margin-right:auto}}@media(max-width:1100px){.sidebar{width:200px;padding:28px 20px}main{margin-left:200px;padding:34px 30px}.quick a{padding:17px 15px}.scorebar div{padding:18px 13px}}@media(max-width:800px){.sidebar{position:static;width:auto;padding:18px 22px;display:block}.brand{font-size:23px}.semester{margin:0;font-size:14px}.sidebar nav{display:flex;overflow-x:auto;gap:4px;margin-top:14px;padding-bottom:4px}.sidebar nav a{white-space:nowrap;font-size:14px;padding:7px 10px}.sidefoot{display:none}main{margin:0;padding:26px 22px 45px}.topline{font-size:13px}.quick{gap:10px;margin-bottom:30px}.quick strong{font-size:16px}.quick small{font-size:13px}.sectionhead{align-items:flex-start;flex-direction:column;gap:8px}.rules{grid-template-columns:1fr;gap:14px}.homework{padding:20px}h2{font-size:25px}}@media(max-width:540px){.quick{grid-template-columns:1fr}.quick a{padding:15px 18px}.quick strong{font-size:18px}.quick small{font-size:14px}.homeworks,.team{grid-template-columns:1fr}.scorebar{grid-template-columns:1fr}.scorebar div{display:flex;align-items:center;gap:18px;padding:14px 18px}.scorebar strong{min-width:40px}.lecture{grid-template-columns:32px 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/* Lecture recordings */
.lecture>div{min-width:0}.recording{margin-top:16px;padding:0;overflow:hidden}.recording summary{padding:14px 18px;color:var(--blue);font-size:15px}.recording[open] summary{border-bottom:1px solid var(--line)}.video-frame{position:relative;aspect-ratio:16/9;background:var(--nav)}.video-frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0}.lecture .video-link{margin:0;padding:12px 18px;font-size:14px}.video-link a{font-weight:600}@media print{.video-frame{display:none}}

/* Recording library */
.recordings-body{background:#101217;color:#f1f2f6;--ink:#f1f2f6;--muted:#a1a6b3;--line:#2a2e37;--blue:#a8bfff}.library-topbar{max-width:1328px;margin:auto;padding:24px;display:flex;align-items:center;gap:48px;border-bottom:1px solid var(--line)}.library-topbar .brand{font-size:24px;letter-spacing:-1px}.library-topbar .brand span{color:#a8bfff}.library-topbar nav{display:flex;gap:28px;align-items:center}.library-topbar nav a{color:#a1a6b3;text-decoration:none;font-size:14px}.library-topbar nav a[aria-current]{color:#fff}.library-year{margin-left:auto;font-size:12px;color:#808796;border:1px solid #30343d;border-radius:6px;padding:5px 9px}.recordings-page{max-width:1328px;margin:0 auto;padding:48px 24px 32px}.library-header{margin-bottom:36px}.library-header .eyebrow{font-size:11px;letter-spacing:.15em;color:#a8bfff;margin-bottom:14px}.library-header h1{font-size:clamp(32px,3.8vw,48px);font-weight:600;letter-spacing:-1.6px;margin:0 0 12px;line-height:1.15}.library-header .intro{font-size:14px;color:#9299a8;margin:0}.watch-layout{display:grid;grid-template-columns:minmax(0,1fr) 316px;gap:32px;align-items:start}.watch-main{min-width:0}.player-screen{border-radius:12px;overflow:hidden;background:#050609;border:1px solid #30343b}.player-screen iframe[hidden]{display:none}.player-cover{position:absolute;inset:0;width:100%;height:100%;border:0;padding:0;cursor:pointer;color:#fff;background:#050609;font:inherit;overflow:hidden}.cover-image{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.67;transition:opacity .2s}.player-cover:after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,#0008,transparent 60%);pointer-events:none}.player-cover:hover .cover-image{opacity:.85}.cover-number{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}.cover-play{position:absolute;z-index:1;top:50%;left:50%;transform:translate(-50%,-50%);width:68px;height:68px;border-radius:50%;display:grid;place-items:center;background:#fff;color:#161922;box-shadow:0 4px 30px #0004;transition:transform .15s}.cover-play svg{width:28px;height:28px;margin-left:3px}.player-cover:hover .cover-play{transform:translate(-50%,-50%) scale(1.08)}.cover-caption{position:absolute;z-index:1;bottom:24px;left:24px;font-size:13px;font-weight:500}.player-cover:focus-visible{outline:3px solid #a8bfff;outline-offset:-5px}.watch-info{padding:24px 0 0}.watch-kicker{font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:#a8bfff;margin:0 0 9px}.watch-info h2{font-size:clamp(22px,2.1vw,28px);font-weight:500;line-height:1.3;letter-spacing:-.5px;max-width:800px}.watch-actions{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:20px;font-size:12px}.watch-author{color:#9299a8}.watch-actions a{display:inline-flex;align-items:center;color:#d0d5e1;text-decoration:none;padding:8px 12px;border:1px solid #343943;border-radius:6px}.watch-actions a:hover{background:#232730;color:#fff}.playlist{min-width:0}.playlist-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;padding-bottom:15px;border-bottom:1px solid var(--line)}.playlist-heading h2{font-size:14px;font-weight:500;letter-spacing:0}.playlist-heading>span{font-size:12px;color:#858d9c}.playlist-options{display:grid;gap:10px}.recording-option{display:flex;align-items:center;gap:12px;padding:12px;text-decoration:none;border:1px solid transparent;border-radius:9px;color:#d7dbe4;transition:background .15s}.recording-option:hover{background:#1b1f28}.recording-option[aria-current="true"]{background:#202631;border-color:#394962}.option-art{position:relative;width:96px;aspect-ratio:16/9;flex-shrink:0;border-radius:5px;overflow:hidden;background:#343943}.option-art img{width:100%;height:100%;object-fit:cover;display:block}.option-art>span{position:absolute;bottom:3px;right:4px;background:#080b11b3;color:#fff;font-size:10px;line-height:1.5;padding:0 4px;border-radius:2px}.option-copy{display:grid;gap:5px;min-width:0}.option-copy small{font-size:10px;color:#8f98a8}.option-copy strong{font-size:12px;font-weight:500;line-height:1.5}.recording-option[aria-current="true"] .option-copy small{color:#a8bfff}.recordings-page footer{margin-top:52px;padding-top:20px;font-size:11px;color:#757d8d}.recordings-page footer a{color:#a1a6b3;text-decoration:none}@media(max-width:1000px){.watch-layout{grid-template-columns:minmax(0,1fr)}.playlist-options{grid-template-columns:repeat(2,minmax(0,1fr))}.playlist-heading{margin-bottom:12px}.recordings-page{padding-top:36px}}@media(max-width:540px){.library-topbar{padding:18px 20px;gap:20px;flex-wrap:wrap}.library-topbar .brand{font-size:22px}.library-year{order:1}.library-topbar nav{order:2;width:100%;gap:24px}.library-topbar nav a{font-size:12px}.recordings-page{padding:30px 20px}.library-header{margin-bottom:24px}.library-header h1{letter-spacing:-1px}.watch-layout{gap:32px}.player-screen{border-radius:8px}.cover-play{width:52px;height:52px}.cover-play svg{width:23px;height:23px}.cover-caption{bottom:14px;left:14px;font-size:11px}.watch-info{padding-top:20px}.watch-actions{flex-wrap:wrap;gap:12px}.playlist-options{grid-template-columns:1fr}.recording-option{padding:10px}.option-art{width:112px}.option-copy strong{font-size:13px}.recordings-page footer{margin-top:36px;gap:10px}}@media print{.player-cover{display:none}.watch-layout{display:block}.recordings-body{background:white;color:black}}