:root{--navy:#0a3f64;--orange:#b9470c;--bg:#f3f6f9;--line:#d9e2ea;--muted:#596875;--green:#26704d}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:#182936;font:16px/1.55 Arial,sans-serif}header{background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:24px;padding:18px max(24px,calc((100vw - 1240px)/2));flex-wrap:wrap}header img{width:170px;display:block}#account{margin-left:auto;display:flex;gap:10px;align-items:center;flex-wrap:wrap}h1,h2,h3{color:var(--navy);line-height:1.2}h1{font-size:32px;margin:0 0 16px}h2{font-size:23px}p{margin:8px 0 18px}a{color:var(--orange)}button,input,select,textarea{font:inherit}button{cursor:pointer;border:1px solid var(--navy);background:white;color:var(--navy);border-radius:8px;padding:9px 14px;min-height:44px}button:hover{background:#e9f0f5}button.primary{background:var(--navy);color:#fff}button.danger{color:#a11f2f;border-color:#a11f2f}button:disabled{opacity:.55;cursor:wait}input,select,textarea{display:block;width:100%;border:1px solid #9fadb9;padding:11px;border-radius:8px;margin:6px 0 18px;background:#fff;color:#182936}textarea{min-height:150px;resize:vertical}label{display:block;font-size:14px;font-weight:bold}main{max-width:1240px;margin:24px auto 60px;padding:0 24px;min-height:60vh}.login{max-width:480px;margin:48px auto;padding:34px}.box,.card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:24px}.stage{background:#eaf1f6;color:var(--navy);padding:9px 24px;text-align:center;font-size:13px}.muted,small{color:var(--muted)}.notice{background:#eaf1f6;padding:14px;border-radius:8px}.error{color:#a11f2f}.success{color:var(--green)}#message{max-width:1192px;margin:16px auto;padding:0 24px}footer{text-align:center;padding:24px;border-top:1px solid var(--line);font-size:14px}.layout{display:grid;grid-template-columns:210px minmax(0,1fr);gap:24px}.sidebar{display:flex;flex-direction:column;gap:8px;align-self:start}.sidebar button{text-align:left;border:0;background:transparent}.sidebar button.active{background:var(--navy);color:#fff}.heading,.actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.heading{justify-content:space-between;margin:0 0 24px}.heading h1{margin:0}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px}.card .actions{margin-top:20px}.badge{display:inline-block;border-radius:20px;padding:4px 10px;background:#eaf1f6;color:var(--navy);font-size:12px}.badge.ok{background:#e7f4ec;color:var(--green)}.metric{font-size:36px;font-weight:bold;color:var(--navy)}.table-scroll{overflow:auto;border:1px solid var(--line);border-radius:12px}table{border-collapse:collapse;width:100%;min-width:640px;background:#fff;font-size:14px}th,td{padding:14px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}th{background:var(--navy);color:white}td .actions{min-width:230px}td{overflow-wrap:anywhere}dialog{border:0;border-radius:14px;width:calc(100% - 32px);max-width:760px;max-height:90vh;padding:28px}dialog::backdrop{background:#082f4ba8}.dialog-head{display:flex;justify-content:space-between;gap:16px;align-items:start;margin-bottom:20px}.dialog-head h2{margin:0;overflow-wrap:anywhere;min-width:0}.dialog-head button{flex-shrink:0}.form-error{color:#a11f2f}.lesson-content{white-space:pre-wrap;overflow-wrap:anywhere;font-size:18px;line-height:1.8;margin:24px 0}.filters{display:flex;gap:12px;flex-wrap:wrap;align-items:end;margin-bottom:20px}.filters>label{flex:1;min-width:140px}.filters input,.filters select{margin-bottom:0}.skip{position:absolute;left:-9999px}.skip:focus{left:12px;background:white;padding:12px;z-index:100}:focus-visible{outline:3px solid #f4772f;outline-offset:3px}.module{padding:18px 0;border-top:1px solid var(--line)}.module h3{margin:0 0 10px}.small{font-size:13px}.token{font-size:13px;min-height:90px}.status-filter{max-width:300px;margin-bottom:20px}@media(max-width:800px){.layout{grid-template-columns:1fr}.sidebar{flex-direction:row;overflow:auto;padding-bottom:8px}.sidebar button{white-space:nowrap}header{gap:12px;padding:16px}header img{width:145px}#account{margin-left:0;width:100%}main{padding:0 16px}h1{font-size:27px}.login{margin:24px auto;padding:24px}.grid{grid-template-columns:1fr}.responsive-table{display:block;min-width:0}.responsive-table thead{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}.responsive-table tbody,.responsive-table tr,.responsive-table td{display:block}.responsive-table tr{padding:16px;border-bottom:1px solid var(--line)}.responsive-table td{border:0;padding:6px 0}.responsive-table td::before{content:attr(data-label);display:block;font-weight:bold;color:var(--muted);font-size:12px}.dialog-head{flex-wrap:wrap}dialog{padding:22px}.box,.card{padding:20px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto}}

.lesson-frame{width:100%;height:82vh;border:1px solid #BBD4E6;border-radius:8px;background:#fff}