:root{--bg:#0b1015;--panel:#111922;--panel2:#16212c;--ink:#e7edf2;--muted:#9aacba;--line:#2a3a49;--blue:#68c6ff;--green:#83d6a1;--amber:#ffd17c;--red:#ff9292;--mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.48 system-ui,-apple-system,sans-serif}header{height:53px;display:flex;gap:14px;align-items:center;border-bottom:1px solid var(--line);padding:0 17px;background:#0e151d;position:sticky;top:0;z-index:2}.brand{display:flex;align-items:center;gap:8px;letter-spacing:.09em;font-family:var(--mono);font-size:14px}.mark{color:var(--blue);font-size:25px}.brand small{color:var(--muted);font-size:10px;border-left:1px solid var(--line);padding-left:10px}#sessionMeta{margin-left:auto;color:var(--muted);font:12px var(--mono)}main{display:grid;grid-template-columns:225px minmax(430px,1fr) minmax(350px,40%);height:calc(100vh - 53px);overflow:hidden}aside{background:var(--panel);min-width:0}#nav{border-right:1px solid var(--line);overflow:auto;padding:16px 10px}#workspace{overflow:auto;padding:24px 28px 80px;max-width:1080px;width:100%;justify-self:center}.readerHead{height:47px;display:flex;align-items:center;justify-content:space-between;padding:0 14px;border-bottom:1px solid var(--line);font:12px var(--mono);letter-spacing:.1em;color:var(--blue)}#reader{border-left:1px solid var(--line);overflow:hidden;display:flex;flex-direction:column}#citationLabel{padding:12px 14px;color:var(--amber);font:13px var(--mono);border-bottom:1px solid var(--line)}#rfcText{white-space:pre-wrap;overflow:auto;margin:0;padding:17px 15px 90px;color:#cbd7df;font:12px/1.48 var(--mono)}.navTitle{font:11px var(--mono);color:var(--muted);letter-spacing:.12em;margin:12px 8px 7px}.navItem{padding:9px 9px;border-radius:4px;cursor:pointer;display:flex;gap:8px;align-items:center;font-size:14px}.navItem:hover,.navItem.active{background:var(--panel2)}.navItem.active{color:var(--blue)}.lock{color:#657686;font-size:12px}.progressDot{width:7px;height:7px;background:#52616e;border-radius:50%}.progressDot.done{background:var(--green)}h1{font:600 27px/1.16 system-ui;margin:0 0 7px}h2{font:600 18px/1.2 system-ui;margin:28px 0 10px}.eyebrow{font:12px var(--mono);letter-spacing:.11em;color:var(--blue);margin-bottom:10px}.lede{color:var(--muted);max-width:70ch;margin:0 0 20px}.notice{background:#152231;border-left:3px solid var(--blue);padding:12px 14px;color:#c9d8e3;margin:17px 0;font-size:14px}.card{border:1px solid var(--line);background:var(--panel);padding:17px;margin:14px 0;border-radius:6px}.card h3{font-size:16px;margin:0 0 7px}.cite{color:var(--blue);font:12px var(--mono);border:0;padding:0;background:none;text-decoration:underline;cursor:pointer;white-space:nowrap}.cite:hover{color:#b4e4ff}.mono,textarea,input.code{font-family:var(--mono)}textarea,input,select{background:#0c131b;color:var(--ink);border:1px solid #405262;border-radius:4px;padding:9px;font:14px var(--mono);width:100%}textarea{min-height:82px;resize:vertical}button{font:inherit;cursor:pointer}.primary{background:#1b81b7;color:white;border:1px solid #4aaee4;border-radius:4px;padding:9px 12px}.primary:hover{background:#2294d0}.quiet{background:transparent;color:var(--muted);border:1px solid var(--line);padding:6px 8px;border-radius:4px;font-size:12px}.quiet:hover{color:var(--ink);border-color:#668096}.import input{display:none}.row{display:flex;gap:10px;align-items:center}.row>*{flex:1}.result{font:14px var(--mono);padding:11px;background:#0a1118;border:1px solid var(--line);margin-top:11px;white-space:pre-wrap}.good{color:var(--green)}.bad{color:var(--red)}.warn{color:var(--amber)}.tag{display:inline-block;background:#203142;color:#b7d8ec;border-radius:3px;font:12px var(--mono);padding:2px 5px;margin:2px}.grid2{display:grid;grid-template-columns:1fr 1fr;gap:14px}.answer{display:block;text-align:left;width:100%;border:1px solid var(--line);background:#111a24;color:var(--ink);border-radius:4px;margin:7px 0;padding:10px}.answer:hover{border-color:var(--blue)}.answer.correct{border-color:var(--green);color:var(--green)}.answer.incorrect{border-color:var(--red);color:var(--red)}.choiceRow{display:flex;gap:8px;flex-wrap:wrap}.choiceRow .answer{width:auto;flex:1;min-width:100px;text-align:center}.step{border-left:2px solid #35546a;padding:7px 10px;margin:5px 0;font:13px/1.4 var(--mono)}.step.hit{border-color:var(--green)}.step.stop{border-color:var(--red)}.table{width:100%;border-collapse:collapse;font-size:14px}.table th,.table td{border-bottom:1px solid var(--line);padding:9px;text-align:left;vertical-align:top}.table th{font:12px var(--mono);color:var(--muted)}.map{display:flex;flex-wrap:wrap;gap:7px}.node{padding:8px 10px;border:1px solid var(--line);background:var(--panel);border-radius:4px;color:var(--blue);cursor:pointer;font:13px var(--mono)}.node:hover{border-color:var(--blue)}.status{font:12px var(--mono);color:var(--muted);margin-top:8px}.readerClosed main{grid-template-columns:225px minmax(430px,1fr)}.readerClosed #reader{display:none}@media(max-width:900px){main{grid-template-columns:190px 1fr}.readerHead,#reader{display:none}#workspace{padding:20px}.readerClosed main{grid-template-columns:190px 1fr}}@media(max-width:620px){main,.readerClosed main{grid-template-columns:1fr;height:auto}#nav{border-right:0;border-bottom:1px solid var(--line);display:flex;overflow:auto;padding:7px}.navTitle{display:none}.navItem{white-space:nowrap}.grid2{grid-template-columns:1fr}#workspace{min-height:calc(100vh - 105px)}header{padding:0 9px}.brand small,#sessionMeta{display:none}}
.videoShelf{border-color:#465342}.videoLink{display:flex;gap:8px;align-items:center;justify-content:space-between;padding:9px 10px;margin-top:7px;border:1px solid var(--line);border-radius:4px;color:#d7e6ef;text-decoration:none;font-size:14px}.videoLink:hover{border-color:var(--red);color:white;background:#1b2025}.videoLink span{font:11px var(--mono);color:var(--red);white-space:nowrap}