:root{color-scheme:dark;--bg:#050a11;--panel:#0d1622;--line:#263547;--text:#f1f5fa;--muted:#a1b2c6;--gold:#e5bd76}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.65 "Segoe UI",Arial,sans-serif}button,input,select{font:inherit}button,a,input,select{touch-action:manipulation}button{cursor:pointer}a{color:var(--gold)}button{border:1px solid var(--line);border-radius:7px;padding:9px 16px;background:#142132;color:var(--text)}button:hover{border-color:var(--gold)}button:disabled{opacity:.55;cursor:wait}button.primary{color:#15120c;background:var(--gold);border-color:var(--gold);font-weight:650}button.secondary{background:transparent}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #7ec8ff;outline-offset:3px}.skip{position:fixed;top:-100px;z-index:20;background:#fff;color:#111;padding:12px}.skip:focus{top:0}.rail{position:fixed;left:0;top:0;bottom:0;width:252px;border-right:1px solid var(--line);padding:28px 20px;background:#08101b;display:flex;flex-direction:column}.brand{display:flex;gap:12px;align-items:center;color:white;text-decoration:none;font-size:23px;font-weight:700;letter-spacing:.06em}.brand small{display:block;color:var(--gold);font-size:11px;letter-spacing:.28em}.shield{display:grid;place-items:center;width:46px;height:51px;background:var(--gold);color:#16120c;clip-path:polygon(50% 0,96% 16%,85% 76%,50% 100%,15% 76%,4% 16%)}.eyebrow{color:var(--gold);font-size:12px;letter-spacing:.14em;font-weight:650}.rail>.eyebrow{margin-top:52px;color:var(--muted)}nav{display:grid;gap:8px}nav button{text-align:left;background:transparent;border-color:transparent;padding:12px;font-size:14px}nav button[aria-current]{border-color:#695532;background:#33291c;color:#ffe0a9}.rail-bottom{margin-top:auto;color:var(--muted);font-size:12px}.rail-bottom p{font-size:11px}.status-dot{display:inline-block;width:7px;height:7px;background:#7dccad;border-radius:50%;margin-right:8px}.workspace{margin-left:252px}header{display:flex;justify-content:space-between;align-items:center;gap:16px;min-height:83px;border-bottom:1px solid var(--line);padding:20px 42px;font-size:11px;letter-spacing:.07em;color:var(--muted)}header b{padding:0 12px;color:var(--gold)}header>div{display:flex;align-items:center;gap:15px}header button{font-size:12px}.environment{margin:0;padding:8px 42px;color:#d9bf90;background:#241e14;font-size:12px}main{max-width:1450px;margin:auto;padding:35px 42px 60px;min-height:75vh}h1{font-size:clamp(29px,3vw,42px);line-height:1.2;letter-spacing:-.03em;margin:9px 0 16px}h2{font-size:23px;margin:0 0 12px}h3{font-size:18px;margin:6px 0 12px}p{margin:0 0 18px}.muted{color:var(--muted)}.intro{max-width:680px}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;margin:32px 0}.stat{padding:19px 24px;background:var(--panel);border:1px solid var(--line);border-radius:9px}.stat strong{display:block;font-size:30px;line-height:1.3}.stat span{color:var(--muted);font-size:13px}.section-heading{display:flex;justify-content:space-between;align-items:center;margin:30px 0 18px}.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:21px}.card{border:1px solid var(--line);border-radius:10px;padding:26px;background:linear-gradient(125deg,#101e2d,#0b131e)}.card.gold{border-top:3px solid var(--gold)}.card p{color:var(--muted);font-size:14px}.card .eyebrow{color:var(--gold);font-size:11px}.card-bottom{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:25px}.badge{display:inline-block;border:1px solid #526c64;border-radius:20px;padding:2px 10px;color:#b6e1cf;font-size:12px}progress{width:100%;height:7px;accent-color:var(--gold)}.progress-label{font-size:12px;color:var(--muted);margin:15px 0 5px;display:flex;justify-content:space-between}.lesson-layout{display:grid;grid-template-columns:minmax(0,2fr) minmax(270px,1fr);gap:24px}.lesson-body{padding:32px;background:var(--panel);border:1px solid var(--line);border-radius:10px}.lesson-body p{margin-bottom:24px;max-width:75ch}.objective{padding:14px 18px;border-left:3px solid var(--gold);background:#302719;margin-bottom:26px}.sources{font-size:13px;border-top:1px solid var(--line);padding-top:20px}.sources li{margin-bottom:12px}.tutor{align-self:start;position:sticky;top:20px}.tutor input{width:100%;margin:10px 0;padding:12px}.tutor button{width:100%}.evidence{border-left:2px solid var(--gold);padding-left:15px;margin-top:20px;font-size:14px}.actions{display:flex;gap:12px;flex-wrap:wrap;margin:20px 0}input,select{background:#08101a;border:1px solid #53677e;color:white;border-radius:6px;padding:9px}fieldset{border:1px solid var(--line);padding:20px;margin:22px 0;border-radius:8px}fieldset label{display:flex;gap:12px;align-items:flex-start;margin:14px 0;padding:14px;background:#101c2a;border-radius:7px}input[type=radio]{margin-top:7px;accent-color:var(--gold)}label{display:block}#message:not(:empty){margin:20px 42px 0;border:1px solid #b68c4b;padding:12px 18px;background:#302719}.empty{padding:30px;border:1px dashed var(--line);border-radius:10px;color:var(--muted)}.table-wrap{overflow:auto}table{width:100%;border-collapse:collapse;text-align:left}th,td{padding:13px;border-bottom:1px solid var(--line);font-size:14px}th{color:var(--muted)}.verify{max-width:760px;margin:60px auto}.assignment{display:flex;align-items:end;gap:16px;flex-wrap:wrap}.assignment select{display:block}footer{border-top:1px solid var(--line);padding:20px 42px;color:var(--muted);font-size:11px}[hidden]{display:none!important}@media(max-width:1000px){.rail{width:208px}.workspace{margin-left:208px}main{padding:28px}.lesson-layout{grid-template-columns:1fr}.tutor{position:static}header,.environment{padding-left:28px;padding-right:28px}}@media(max-width:720px){.rail{position:static;width:auto;padding:20px}.rail>.eyebrow,.rail-bottom{display:none}.brand{font-size:19px}nav{grid-template-columns:repeat(2,1fr);margin-top:20px}nav button{font-size:12px}.workspace{margin:0}header{padding:15px;flex-wrap:wrap}.environment{padding:10px 20px}main{padding:25px 20px}.grid{grid-template-columns:1fr}.stats{gap:8px}.stat{padding:12px}.stat strong{font-size:24px}.stat span{font-size:11px}.lesson-body{padding:20px}#message:not(:empty){margin:15px 20px 0}.card-bottom{flex-wrap:wrap}}

.saved-note { white-space: pre-wrap; overflow-wrap: anywhere; }
#lesson-note textarea { display: block; width: 100%; box-sizing: border-box; font: inherit; }
.self-review { border: 1px solid var(--line); border-radius: 8px; padding: 18px; margin: 24px 0; }
.self-review summary { cursor: pointer; color: var(--gold); font-weight: 600; }
.self-review[open] summary { margin-bottom: 20px; }
summary:focus-visible { outline: 3px solid #7ec8ff; outline-offset: 3px; }
.lesson-body { overflow-wrap: anywhere; }
.learner-preview { max-width: 960px; }
.catalog-filters { display: flex; flex-wrap: wrap; gap: 18px; align-items: end; margin: 24px 0; }
.catalog-filters label { flex: 1 1 200px; }
.catalog-filters input, .catalog-filters select { display: block; width: 100%; box-sizing: border-box; margin-top: 8px; }
.assessment-status { margin: 24px 0; }
button:disabled { cursor: not-allowed; opacity: .55; }
.study-dialog { max-width: 480px; width: calc(100% - 40px); box-sizing: border-box; border: 1px solid var(--gold); border-radius: 12px; padding: 28px; color: var(--text); background: #101c2a; }
.study-dialog::backdrop { background: rgba(0,0,0,.7); }