:root{--ink:#101b35;--blue:#3974e8;--lime:#bff264;--muted:#606b7b;--line:#dce2eb;--paper:#fffdf8}*{box-sizing:border-box}[hidden]{display:none!important}body{margin:0;color:var(--ink);background:#f7f5ed;font:16px/1.6 system-ui,sans-serif}header{padding:20px max(24px,calc((100vw - 1140px)/2));display:flex;justify-content:space-between;align-items:center;gap:20px;background:var(--paper);border-bottom:1px solid var(--line)}.brand{font-size:20px;font-weight:800;text-decoration:none;color:var(--ink);white-space:nowrap}.brand b{padding:8px;border-radius:10px;background:var(--ink);color:var(--lime);margin-right:10px}main{max-width:1140px;margin:0 auto;padding:16px 24px 60px}h1{font-size:clamp(32px,5vw,62px);line-height:1.1;letter-spacing:-2px;margin:12px 0 22px}h2{font-size:25px;line-height:1.2}p{color:var(--muted)}em{font-style:normal;color:var(--blue)}.eyebrow{text-transform:uppercase;font-size:12px;font-weight:800;letter-spacing:2px;color:var(--blue)}.hero{padding:35px 0}.panel,.card{background:var(--paper);padding:26px;border:1px solid var(--line);border-radius:18px}.auth{max-width:460px;margin:50px auto}.auth h1{font-size:38px}.auth form>button{width:100%;margin-top:24px}label{display:block;font-size:14px;font-weight:650;margin-bottom:6px}form label{margin-top:16px}input,select{font:inherit;padding:12px;border:1px solid #aeb9c9;border-radius:8px;background:white;max-width:100%;width:100%;color:var(--ink)}button{font:600 15px system-ui,sans-serif;cursor:pointer;border:0;border-radius:8px;background:var(--ink);color:white;padding:13px 18px}button:hover{background:var(--blue)}button:disabled{opacity:.6;cursor:wait}.secondary{background:#e8ecf2;color:var(--ink)}.text-button{background:transparent;color:var(--blue);padding:18px 0 0}small{color:var(--muted)}.filters{display:flex;gap:16px;margin:0 0 28px}.filters>div:first-child{flex:1}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.card{display:flex;flex-direction:column}.card p{flex:1}.tag{align-self:flex-start;border-radius:20px;padding:3px 10px;background:#e8efff;color:var(--blue);font-size:12px;font-weight:600}.card small{display:block;margin:10px 0}.card button{width:100%;margin-top:16px}.card progress{margin-top:16px}.complete{color:#25734a;font-weight:700}progress{width:100%;height:10px;accent-color:var(--blue)}video{width:100%;max-height:65vh;display:block;background:#000;border-radius:14px;margin:22px 0}#message{min-height:25px}#message.error{color:#a51b32}footer{text-align:center;padding:25px;color:var(--muted);font-size:14px}:focus-visible{outline:3px solid var(--blue);outline-offset:3px}@media(max-width:800px){.grid{grid-template-columns:repeat(2,1fr)}header{flex-wrap:wrap}}@media(max-width:550px){.grid{grid-template-columns:1fr}.filters{flex-direction:column}.hero{padding:20px 0}#greeting{display:none}main{padding:12px 18px 40px}.brand{font-size:17px}}
:root{color-scheme:light}.category-group{margin:38px 0 50px}.category-group>h2{border-bottom:1px solid var(--line);padding-bottom:16px}.card h3{font-size:23px;line-height:1.25;margin:18px 0 8px}header nav{display:flex;align-items:center;gap:10px;flex-wrap:wrap}#security-check{margin-top:20px;min-height:65px}#security-status{font-size:13px}#paywall{max-width:760px;margin:40px auto}#paywall h1{font-size:38px}#paywall button{margin:12px 12px 0 0}#coupon-form{margin:24px 0;padding:20px 0;border-block:1px solid var(--line)}#coupon-code{max-width:360px;display:block}#paypal-checkout{background:#ffc439;color:#102b56}#paypal-checkout:hover{background:#efb829}#payment-recovery{margin-bottom:24px}#payment-recovery button{margin:6px}
.auth.registration{max-width:780px}fieldset{border:0;padding:0;margin:20px 0;min-width:0}legend{font-weight:750}.profile-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 20px}.check-label{display:flex;align-items:flex-start;gap:12px;font-weight:400;margin-top:24px}.check-label input{width:20px;height:20px;flex-shrink:0}.privacy-note{font-size:14px}.privacy-note a,footer a{color:var(--blue)}.topic-link{display:block;text-decoration:none;font-weight:650;color:var(--blue);padding:12px 0;margin-top:16px}.filters{flex-wrap:wrap}.filters>div{min-width:150px}.filters>div:first-child{min-width:200px}@media(max-width:550px){.profile-grid{grid-template-columns:1fr}.filters>div{width:100%}}
#player .panel{margin-bottom:20px}#test{max-width:850px;margin:28px auto}#test h1{font-size:clamp(28px,4vw,42px);letter-spacing:-1px}.test-question{padding:22px 0;border-bottom:1px solid var(--line);margin:0 0 24px}.test-question legend{font-size:18px;padding-top:20px}.test-option{display:flex;align-items:flex-start;gap:12px;border:1px solid var(--line);border-radius:9px;padding:14px;margin:10px 0;cursor:pointer;font-size:16px;font-weight:400}.test-option:has(input:checked){background:#e8efff;border-color:var(--blue)}.test-option input{width:20px;height:20px;flex-shrink:0;margin:3px 0 0;accent-color:var(--blue)}#test-result button{margin:8px 12px 0 0}#test-result h2{font-size:30px}#test-score{font-size:22px;color:var(--ink);font-weight:700}
#activity-frame{width:100%;min-height:650px;border:1px solid var(--line);border-radius:12px;background:white}#interactive h1{font-size:36px}#admin-link{color:var(--blue);font-weight:650}@media(max-width:550px){#activity-frame{min-height:500px}}
#youtube-container iframe{width:100%;aspect-ratio:16/9;min-height:220px;border:0;border-radius:12px}#youtube-notice{font-size:.9rem;color:#596579}
.activity-item{border:1px solid var(--line);border-radius:10px;padding:16px;margin:14px 0}.activity-item h3{margin:0 0 6px}.activity-item p{margin:6px 0 12px}.activity-item button{margin-right:10px}
.verify-banner{display:flex;gap:16px;align-items:center;justify-content:space-between;flex-wrap:wrap;border-left:5px solid var(--lime)}.verify-banner p{margin:0;flex:1 1 280px}
.transcript summary{cursor:pointer;font-weight:700}.transcript #transcript-text{max-height:340px;overflow:auto;margin-top:12px;padding-right:8px}.transcript #transcript-text p{margin:0 0 10px;line-height:1.6}

.auth-links{display:flex;flex-wrap:wrap;justify-content:space-between;gap:6px 20px;margin-top:18px}.auth-links .text-button{padding:0}
.text-button:hover,.text-button:focus-visible{background:transparent;text-decoration:underline;text-underline-offset:4px}
#name-row legend{padding:0;margin-bottom:4px;font-size:18px;font-weight:750}
#reset-check{margin-top:20px;min-height:65px}#reset-check-status{font-size:13px}