:root{font:16px system-ui;color:#eaf1fa;background:#121d2e}body{margin:auto;max-width:1150px;padding:24px}header,section{background:#1b2a40;padding:22px;border-radius:12px;margin-bottom:20px}h1,h2,h3{color:#90dcff}label{display:block;margin:10px 0}input,select,textarea,button{font:inherit;border-radius:6px;border:1px solid #6c849e;padding:10px}input,select,textarea{display:block;background:#0f1a2a;color:white;width:min(95%,650px)}textarea{min-height:65px}button{background:#9be8ff;color:#112638;cursor:pointer;margin:5px 8px 5px 0}button:disabled{opacity:.5;cursor:default}.bar{display:flex;align-items:center;flex-wrap:wrap;gap:8px}#status{color:#ffd68c;min-height:28px}pre{white-space:pre-wrap;overflow-wrap:anywhere;background:#111c2e;padding:16px}#videos{display:flex;flex-wrap:wrap;gap:12px}video{width:100%;max-height:250px;background:#000;border-radius:8px}figure{width:30%;min-width:220px;margin:0}#messages{max-height:340px;overflow:auto;white-space:pre-wrap;padding-left:25px}li{margin:10px 0;overflow-wrap:anywhere}#students input{display:inline;width:auto}footer{color:#bdd0e2;font-size:14px;padding:20px}[hidden]{display:none!important}