/* ActivityLock teacher library — October 2026. Scoped to this public page. */
:root{--guide-forest:#173f36;--guide-paper:#f7f7f2;--guide-lime:#dff49a;--guide-ink:#172a25;--guide-muted:#5a6b64;--guide-line:#dce2d8;--guide-coral:#ed9877}
html{scroll-behavior:smooth;scroll-padding-top:24px}
.guide-page{margin:0;background:var(--guide-paper);color:var(--guide-ink);font:16px/1.65 "Manrope","Segoe UI",Arial,sans-serif;-webkit-font-smoothing:antialiased}
.guide-page *{box-sizing:border-box}.guide-page [hidden]{display:none!important}.guide-page a{color:inherit;text-underline-offset:4px}.guide-page button,.guide-page input{font:inherit}.guide-page button{cursor:pointer}
.guide-page :is(a,button,input):focus-visible{outline:3px solid #b95735;outline-offset:5px}.guide-page h1,.guide-page h2,.guide-page h3,.guide-page p{overflow-wrap:break-word}
.guide-shell{width:min(1240px,calc(100% - 80px));margin-inline:auto}.guide-visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.guide-skip{position:absolute;inset-inline-start:20px;top:-100px;z-index:30;background:var(--guide-lime);padding:12px 20px;border-radius:6px;font-weight:700}.guide-skip:focus{top:12px}
.guide-header{background:#fff;border-bottom:1px solid var(--guide-line)}.guide-header-inner{min-height:96px;display:flex;align-items:center;justify-content:space-between;gap:28px}.guide-brand{display:flex;align-items:center;flex:none}.guide-brand img{display:block;width:160px;height:71px;object-fit:contain}
.guide-nav{display:flex;gap:32px;align-items:center;margin-inline-start:auto;margin-inline-end:30px}.guide-nav a{text-decoration:none;font-size:14px;font-weight:600;position:relative}.guide-nav a[aria-current=page]{color:var(--guide-forest)}.guide-nav a[aria-current=page]::after{content:"";position:absolute;inset-inline:0;bottom:-11px;height:2px;background:var(--guide-forest)}
.guide-header-actions{display:flex;gap:20px;align-items:center}.guide-language{display:flex;gap:2px;align-items:center}.guide-language button{border:0;background:transparent;border-radius:5px;min-width:34px;min-height:40px;padding:5px 7px;color:var(--guide-muted);font-size:12px;font-weight:700}.guide-language button[aria-pressed=true]{background:#eef1e9;color:var(--guide-forest)}
.guide-back{display:flex;align-items:center;gap:16px;background:var(--guide-forest);color:#fff!important;padding:12px 20px;border-radius:7px;text-decoration:none;font-weight:650;font-size:13px;white-space:nowrap}.guide-back:hover{background:#225a4d}
.guide-hero{padding:72px 0 76px;overflow:hidden}.guide-intro{display:grid;grid-template-columns:1.06fr 1fr;gap:76px;align-items:center}.guide-eyebrow{display:block;margin:0;color:var(--guide-forest);font-size:10px;font-weight:750;letter-spacing:.13em;line-height:1.5;text-transform:uppercase}
.guide-intro .guide-eyebrow{display:flex;align-items:center;gap:9px}.guide-dot{width:7px;height:7px;background:var(--guide-coral);border-radius:50%;flex:none}.guide-intro h1{font-size:clamp(44px,4.7vw,70px);line-height:1.05;font-weight:650;letter-spacing:-.054em;margin:25px 0 26px}.guide-intro h1>span,.guide-intro h1 em{display:block}.guide-intro h1 em{font:italic 1.04em/1.15 "DM Serif Display",Georgia,"Times New Roman",serif;letter-spacing:-.046em;color:var(--guide-forest);margin-top:2px}
.guide-lead{color:var(--guide-muted);max-width:450px;font-size:17px;line-height:1.8;margin:0}.guide-intro-actions{display:flex;align-items:flex-start;gap:23px;flex-direction:column;margin-top:29px}.guide-primary{display:inline-flex;align-items:center;justify-content:space-between;gap:34px;background:var(--guide-forest);color:#fff!important;border:1px solid var(--guide-forest);border-radius:7px;padding:14px 21px;font-size:14px;font-weight:650;text-decoration:none;transition:background .18s}.guide-primary:hover{background:#225a4d}.guide-primary>span:last-child{font-size:20px;line-height:1}
.guide-text-link{display:inline-flex;align-items:center;gap:12px;font-size:13px;font-weight:650;text-decoration:none;border-bottom:1px solid #afbbb2;padding-bottom:4px}.guide-text-link:hover{border-color:var(--guide-forest)}.guide-hero-detail{display:flex;align-items:center;flex-wrap:wrap;gap:8px;margin-top:31px;font-size:11px;color:var(--guide-muted)}.guide-hero-detail>span:first-child{color:var(--guide-forest);font-weight:800}
.guide-feature{display:block;background:var(--guide-forest);color:#fff!important;padding:20px 20px 0;border-radius:14px;text-decoration:none;box-shadow:0 18px 38px #173f3610;transform:rotate(1deg);transition:transform .2s,box-shadow .2s}.guide-feature:hover{transform:rotate(0);box-shadow:0 18px 38px #173f3624}.guide-feature-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:15px;gap:16px}.guide-feature-label{font-size:9px;font-weight:750;letter-spacing:.15em;color:var(--guide-lime)}.guide-feature-time{font-size:10px;line-height:1;padding:6px 8px;border:1px solid #ffffff33;border-radius:5px;font-variant-numeric:tabular-nums}
.guide-feature-visual{position:relative;aspect-ratio:1.64;background:#fff;border-radius:7px;overflow:hidden}.guide-feature-visual img{display:block;width:100%;height:100%;object-fit:cover;object-position:50% 50%;filter:brightness(.83)}.guide-feature-play{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:68px;height:68px;border-radius:50%;background:var(--guide-lime);color:var(--guide-forest);display:grid;place-items:center;padding-inline-start:4px;font-size:21px;box-shadow:0 0 0 9px #dff49a22}.guide-capture-label{position:absolute;bottom:13px;inset-inline-start:13px;background:#173f36e6;color:#fff;padding:5px 9px;border-radius:4px;font-size:10px}
.guide-feature-copy{display:flex;gap:20px;justify-content:space-between;align-items:center;padding:21px 2px 25px}.guide-feature-copy>div>span{font-size:9px;letter-spacing:.12em;color:#c1d7cc;font-weight:650}.guide-feature-copy h2{font-size:23px;font-weight:550;line-height:1.35;letter-spacing:-.025em;margin:5px 0 0;max-width:340px}.guide-feature-arrow{color:var(--guide-lime);font-size:30px;font-weight:300}
.guide-paths{padding-bottom:70px}.guide-section-heading h2{font-size:clamp(28px,2.7vw,38px);line-height:1.22;letter-spacing:-.04em;font-weight:600;margin:11px 0 0}.guide-path-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-top:27px}.guide-path-grid>a{display:flex;flex-direction:column;min-height:184px;padding:22px;background:#eeefe8;border:1px solid #e3e6dc;border-radius:8px;text-decoration:none;transition:background .18s,border-color .18s}.guide-path-grid>a:hover{background:var(--guide-lime);border-color:#c7df91}.guide-path-number{font-size:10px;font-variant-numeric:tabular-nums;color:#53685f;letter-spacing:.06em}.guide-path-grid strong{font-size:19px;font-weight:600;letter-spacing:-.025em;line-height:1.35;margin:18px 0 17px;max-width:200px}.guide-path-bottom{display:flex;justify-content:space-between;align-items:end;gap:10px;font-size:10px;line-height:1.5;color:var(--guide-muted);margin-top:auto}.guide-path-bottom>span:last-child{font-size:19px;color:var(--guide-forest)}
.guide-library{padding:65px 0 50px;background:#fff;border-block:1px solid var(--guide-line);scroll-margin-top:0}.guide-library-top{display:flex;align-items:end;justify-content:space-between;gap:48px}.guide-library-top>p{font-size:13px;color:var(--guide-muted);max-width:320px;margin:0 0 3px;line-height:1.7}.guide-tools{display:flex;align-items:center;justify-content:space-between;gap:28px;margin-top:31px;padding:21px 0;border-block:1px solid var(--guide-line)}
.guide-filters{display:flex;gap:5px;flex-wrap:wrap;align-items:center}.guide-filters button{border:1px solid transparent;background:transparent;color:var(--guide-muted);border-radius:6px;padding:10px 13px;font-size:11px;font-weight:650;min-height:40px;transition:background .18s,color .18s}.guide-filters button:hover{background:#eef2e8}.guide-filters button[aria-pressed=true]{background:var(--guide-forest);color:#fff;border-color:var(--guide-forest)}
.guide-search-label{position:relative;display:block;width:250px;flex:none}.guide-search-label input{display:block;width:100%;height:43px;border:1px solid #dce2d8;border-radius:6px;background:var(--guide-paper);padding:0 14px 0 39px;color:var(--guide-ink);font-size:12px}.guide-search-label input::placeholder{color:#68766f;opacity:1}.guide-search-icon{position:absolute;width:12px;height:12px;border:1.5px solid var(--guide-muted);border-radius:50%;top:13px;inset-inline-start:15px;pointer-events:none}.guide-search-icon::after{content:"";position:absolute;width:5px;height:1.5px;background:var(--guide-muted);right:-4px;bottom:-3px;transform:rotate(45deg)}
.guide-count{font-size:11px;color:var(--guide-muted);margin:20px 0 23px;min-height:18px}.guide-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:34px 27px}.guide-card{display:flex;flex-direction:column;min-width:0;border:1px solid var(--guide-line);border-radius:9px;overflow:hidden;background:#fff;transition:border-color .18s,box-shadow .18s}.guide-card:hover{border-color:#9eafa1;box-shadow:0 8px 20px #173f3609}
.guide-poster{position:relative;aspect-ratio:16/9;overflow:hidden;background:#e7ece4;display:block;width:100%;padding:0;border:0;border-bottom:1px solid var(--guide-line)}.guide-poster img{display:block;width:100%;height:100%;object-fit:cover;object-position:center;transition:transform .3s}.guide-card:hover .guide-poster img{transform:scale(1.035)}.guide-poster::after{content:"";position:absolute;inset:0;background:linear-gradient(transparent 65%,#173f3620)}
.guide-poster-play{display:grid;place-items:center;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);z-index:1;width:45px;height:45px;border-radius:50%;padding-inline-start:3px;background:#173f36ed;color:var(--guide-lime);font-size:13px;box-shadow:0 0 0 5px #ffffff80}.guide-duration{position:absolute;bottom:11px;inset-inline-end:11px;z-index:1;background:#173f36ed;color:#fff;font-size:10px;font-weight:600;line-height:1.5;padding:3px 7px;border-radius:4px;font-variant-numeric:tabular-nums}
.guide-card-content{padding:23px;display:flex;flex-direction:column;flex:1}.guide-card-topic{font-size:9px;font-weight:750;letter-spacing:.11em;text-transform:uppercase;color:#386556}.guide-card h3{font-size:20px;line-height:1.35;font-weight:600;letter-spacing:-.03em;margin:10px 0 10px}.guide-card p{font-size:12px;line-height:1.8;color:var(--guide-muted);margin:0 0 24px}.guide-watch{display:flex;align-items:center;justify-content:space-between;gap:15px;border:0;border-top:1px solid var(--guide-line);background:transparent;color:var(--guide-forest);padding:14px 0 0;font-size:12px!important;font-weight:650;width:100%;text-align:start;margin-top:auto}.guide-watch>span:last-child{font-size:21px;font-weight:400;line-height:1}.guide-empty{padding:52px 20px;text-align:center;background:var(--guide-paper);border:1px dashed #bdcbbb;border-radius:9px}.guide-empty>span{font-size:38px;color:var(--guide-forest);line-height:1}.guide-empty h3{font-size:23px;font-weight:600;margin:14px 0 6px}.guide-empty p{color:var(--guide-muted);font-size:14px}.guide-empty button{background:var(--guide-forest);color:#fff;padding:12px 19px;border:0;border-radius:6px;font-size:13px}
.guide-library-note{display:flex;align-items:center;justify-content:center;gap:16px;max-width:780px;margin:42px auto 0;padding-top:26px;border-top:1px solid var(--guide-line);font-size:11px;color:var(--guide-muted)}.guide-library-note p{margin:0}.guide-note-icon{display:grid;place-items:center;flex:none;width:30px;height:24px;color:var(--guide-forest);border:1px solid #b7c4b8;border-radius:4px;font-size:11px;font-weight:800}
.guide-next{display:flex;align-items:center;justify-content:space-between;gap:36px;padding:60px 0 65px}.guide-next h2{font-size:clamp(27px,2.8vw,39px);letter-spacing:-.04em;font-weight:550;line-height:1.2;margin:11px 0 13px}.guide-next p:last-child{color:var(--guide-muted);font-size:13px;margin:0}.guide-next .guide-primary{flex:none}
.guide-footer{background:var(--guide-forest);color:#fff;padding:34px 0}.guide-footer-inner{display:flex;justify-content:space-between;align-items:center;gap:36px}.guide-footer-brand{font-size:20px;font-weight:650;letter-spacing:-.035em;text-decoration:none}.guide-footer p{color:#c1d4cb;font-size:11px;margin:3px 0 0}.guide-footer nav{display:flex;flex-wrap:wrap;gap:24px}.guide-footer nav a,.guide-footer-top{font-size:11px;color:#d9e8de;text-decoration:none}.guide-footer a:hover{text-decoration:underline}.guide-footer-top{display:flex;gap:13px;align-items:center}.guide-footer-top span:last-child{font-size:18px;color:var(--guide-lime)}
#guide-player{width:min(1000px,calc(100% - 32px));max-height:94dvh;overflow:auto;padding:0;border:1px solid #a5b7aa;border-radius:12px;background:var(--guide-paper);color:var(--guide-ink);box-shadow:0 26px 80px #071b2b55}#guide-player::backdrop{background:#092a23dd;backdrop-filter:blur(5px)}.guide-player-inner{padding:27px}.guide-player-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:22px}.guide-player-heading h2{font-size:25px;font-weight:600;line-height:1.3;letter-spacing:-.035em;margin:7px 0 22px}#guide-close{flex:none;width:42px;height:42px;border-radius:6px;border:1px solid #cbd6ca;background:#fff;color:var(--guide-forest)}#guide-video{display:block;width:100%;aspect-ratio:16/9;border-radius:6px;background:#102d25}.guide-player-options{display:flex;gap:16px;align-items:center;flex-wrap:wrap;padding-top:17px;font-size:11px;color:var(--guide-muted)}#guide-cc{background:#fff;border:1px solid #b9c9b8;color:var(--guide-forest);border-radius:5px;padding:9px 12px;font-size:11px;font-weight:750;min-height:39px}#guide-cc[aria-pressed=true]{background:var(--guide-forest);color:#fff}.guide-player-options a{margin-inline-start:auto;color:var(--guide-forest)}#guide-player-description,#guide-player-status{font-size:13px;color:var(--guide-muted);margin-bottom:0}
[dir=rtl] .guide-search-label input{padding:0 39px 0 14px}[dir=rtl] .guide-intro h1{letter-spacing:0;line-height:1.25}[dir=rtl] .guide-intro h1 em{font-family:"Segoe UI",Arial,sans-serif;font-style:normal;letter-spacing:0;font-size:1em}[dir=rtl] .guide-eyebrow{letter-spacing:0}[dir=rtl] .guide-feature{transform:rotate(-1deg)}[dir=rtl] .guide-feature:hover{transform:rotate(0)}
@media(min-width:1500px){.guide-hero{padding:84px 0}.guide-intro h1{font-size:75px}.guide-intro-actions{flex-direction:row;align-items:center;gap:22px}.guide-text-link{max-width:190px;line-height:1.5}}
@media(max-width:1100px){.guide-shell{width:calc(100% - 56px)}.guide-nav{gap:22px;margin-inline-end:10px}.guide-header-inner{gap:20px}.guide-header-actions{gap:12px}.guide-intro{gap:40px}.guide-tools{gap:15px;align-items:stretch;flex-direction:column}.guide-search-label{width:min(100%,360px)}.guide-path-grid>a{padding:18px}.guide-path-grid strong{font-size:17px}.guide-grid{gap:25px 20px}.guide-card-content{padding:20px}}
@media(max-width:820px){.guide-header-inner{min-height:84px}.guide-nav{display:none}.guide-header-actions{margin-inline-start:auto}.guide-hero{padding:48px 0 55px}.guide-intro{grid-template-columns:1fr 1fr;gap:28px}.guide-intro h1{font-size:46px}.guide-lead{font-size:14px}.guide-feature{padding:15px 15px 0}.guide-feature-copy h2{font-size:19px}.guide-feature-play{width:52px;height:52px;font-size:16px}.guide-hero-detail{font-size:10px;margin-top:23px}.guide-path-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.guide-path-grid>a{min-height:161px}.guide-path-grid strong{font-size:20px;max-width:230px;margin:14px 0}.guide-paths{padding-bottom:48px}.guide-library{padding-top:48px}.guide-library-top{align-items:flex-start;gap:22px;flex-direction:column}.guide-library-top>p{max-width:500px}.guide-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.guide-footer-inner{flex-wrap:wrap;gap:24px}.guide-footer-top{margin-inline-start:auto}.guide-next h2{max-width:400px}}
@media(max-width:600px){.guide-shell{width:calc(100% - 36px)}.guide-header-inner{gap:10px;min-height:76px}.guide-brand img{width:126px;height:56px}.guide-header-actions{gap:8px}.guide-language{gap:0}.guide-language button{font-size:10px;padding:4px;min-width:27px;min-height:36px}.guide-back{padding:10px 12px;gap:10px;font-size:11px}.guide-back>span:first-child{max-width:90px;white-space:normal;line-height:1.4}.guide-hero{padding:38px 0 40px}.guide-intro{grid-template-columns:1fr;gap:32px}.guide-intro h1{font-size:clamp(43px,10vw,60px);margin:20px 0 20px}.guide-lead{font-size:15px;max-width:430px}.guide-eyebrow{font-size:9px}.guide-intro-actions{margin-top:25px;gap:18px}.guide-hero-detail{font-size:10px;margin-top:22px}.guide-feature{transform:none;border-radius:11px;padding:16px 16px 0}.guide-feature:hover{transform:none}.guide-feature-visual{aspect-ratio:1.64}.guide-feature-copy{padding:18px 0 22px}.guide-feature-copy h2{font-size:21px;max-width:260px}.guide-feature-play{width:59px;height:59px;font-size:18px}.guide-paths{padding-bottom:38px}.guide-section-heading h2{font-size:29px;margin-top:9px}.guide-path-grid{gap:10px;margin-top:21px}.guide-path-grid>a{padding:17px 15px;min-height:183px}.guide-path-grid strong{font-size:18px;line-height:1.4;margin:15px 0 19px}.guide-path-bottom{font-size:10px;gap:6px}.guide-library{padding:39px 0 35px}.guide-library-top{gap:16px}.guide-library-top>p{font-size:12px}.guide-tools{margin-top:25px;padding:17px 0;gap:17px}.guide-filters{gap:3px}.guide-filters button{font-size:10px;padding:9px 11px}.guide-search-label{width:100%}.guide-count{margin:18px 0 20px}.guide-grid{grid-template-columns:1fr;gap:23px}.guide-card-content{padding:23px}.guide-card h3{font-size:21px}.guide-card p{font-size:13px}.guide-poster-play{width:50px;height:50px}.guide-library-note{align-items:flex-start;margin-top:31px;padding-top:22px;font-size:11px;gap:12px}.guide-next{padding:39px 0 43px;align-items:flex-start;flex-direction:column;gap:23px}.guide-next h2{font-size:30px;max-width:320px}.guide-footer{padding:30px 0}.guide-footer-inner{align-items:flex-start;gap:23px}.guide-footer nav{width:100%;gap:23px;order:3}.guide-footer-top{margin-top:8px;font-size:10px}.guide-player-inner{padding:17px}#guide-player{width:calc(100% - 18px);border-radius:9px}.guide-player-heading h2{font-size:20px}.guide-player-options{gap:11px}.guide-player-options a{margin-inline-start:0}.guide-player-options>span{flex-basis:calc(100% - 95px);font-size:10px}[dir=rtl] .guide-feature{transform:none}}
@media(max-width:360px){.guide-header-inner{gap:6px}.guide-brand img{width:104px;height:50px}.guide-header-actions{gap:4px}.guide-language button{min-width:24px;padding:3px;font-size:10px}.guide-back{padding:9px;gap:7px;font-size:10px}.guide-back>span:first-child{max-width:68px}.guide-back>span:last-child{font-size:12px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.guide-page *, .guide-page *::before,.guide-page *::after{transition:none!important}.guide-feature{transform:none!important}.guide-card:hover .guide-poster img{transform:none}}