*{box-sizing:border-box}body{margin:0;font:17px/1.55 system-ui,-apple-system,sans-serif;background:#091d34;color:#ebf5ff}.wrap{max-width:620px;margin:0 auto;padding:40px 22px 65px}.brand{font-size:23px;font-weight:750;letter-spacing:.02em}.brand strong{color:#95d2fa}.banner{display:inline-block;background:#193e5f;color:#a9d7ff;border:1px solid #477ca8;border-radius:9px;padding:8px 12px;font-size:12px;font-weight:700;letter-spacing:.04em}h1{font-size:36px;line-height:1.14;margin:25px 0 12px}p{color:#c3d8ec}.panel{background:white;color:#14304e;border-radius:16px;padding:24px;margin-top:22px;box-shadow:0 12px 30px #0003}.panel p{color:#4d6577}.panel h2{font-size:21px;margin-top:0}label{display:block;font-weight:650;margin-bottom:6px}input{width:100%;border:2px solid #a9bdd0;border-radius:10px;font:18px system-ui;padding:14px;margin-bottom:16px}input:focus{outline:3px solid #83bfff}button{border:0;border-radius:10px;background:#076eaf;color:white;font-weight:750;font-size:17px;padding:14px 20px;cursor:pointer;min-height:50px}button:disabled{opacity:.5}#status{white-space:pre-wrap;min-height:32px;font-weight:650}.locked{border-left:4px solid #b06c00;padding:12px;background:#fff6e1}.foot{font-size:14px;margin-top:35px}.foot a{color:#95d2fa}[hidden]{display:none!important}
[data-classroom] a{color:#95d2fa}
[data-classroom] select{width:100%;font:inherit;padding:12px;border-radius:10px;margin-bottom:18px}
[data-classroom] progress{width:100%;height:20px;accent-color:#95d2fa}
#lessons{display:grid;gap:8px;max-height:320px;overflow:auto;padding:5px;margin-bottom:22px}
#lessons button{text-align:left;background:#193e5f}
#lessons button[aria-current="step"]{outline:2px solid #95d2fa;outline-offset:1px}
[data-classroom] button:focus-visible,[data-classroom] a:focus-visible{outline:3px solid #95d2fa;outline-offset:3px}
[data-classroom] video{display:block;max-width:min(100%,360px,36.5625vh);height:auto;aspect-ratio:9/16;object-fit:contain;background:#000;border:1px solid #477ca8;border-radius:12px;margin:18px auto}
[data-classroom] section{margin-top:28px;padding-top:18px;border-top:1px solid #477ca8}
[data-classroom] fieldset{border:1px solid #477ca8;border-radius:10px;margin:16px 0;padding:14px}
[data-classroom] legend{font-weight:700;padding:0 8px}
[data-classroom] fieldset button{display:block;width:100%;text-align:left;margin:8px 0;background:#193e5f}
[data-classroom] fieldset button[aria-pressed="true"]{outline:2px solid #95d2fa;background:#076eaf}