:root{--bg:#f3f3f0;--paper:#fff;--ink:#171817;--muted:#60635e;--line:#cccfc7;--soft:#eff0eb;--gold:#f4d38a;--gold-ink:#33250e;--bad:#98231e;--good:#236542;--focus:#967129;color-scheme:light;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.65;font-size:16px}
:root[data-theme=dark]{--bg:#111312;--paper:#1c1f1d;--ink:#f0f2ed;--muted:#b9c0b6;--line:#4c534a;--soft:#282e28;--gold:#63542d;--gold-ink:#fff4d4;--bad:#ffaaa2;--good:#a0dbb3;--focus:#e7c878;color-scheme:dark}
*{box-sizing:border-box}body{margin:0;color:var(--ink);background:var(--bg)}a{color:inherit;text-underline-offset:3px}button,input,textarea,select{font:inherit}a,button{touch-action:manipulation}button,.button{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:44px;padding:9px 16px;border:1px solid var(--ink);border-radius:5px;background:var(--ink);color:var(--paper);text-decoration:none;font-size:14px;font-weight:750;cursor:pointer}button.quiet,.button.quiet{background:var(--paper);color:var(--ink);border-color:var(--line)}button:disabled{opacity:.55;cursor:wait}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid var(--focus);outline-offset:3px}header{display:flex;justify-content:space-between;gap:20px;align-items:center;padding:20px max(20px,calc((100vw - 1420px)/2));border-bottom:3px double var(--ink);background:var(--paper)}.brand{font-size:24px;font-weight:850;letter-spacing:-.6px;text-decoration:none;line-height:1.1}.brand small{display:block;font-size:9px;letter-spacing:1.5px;margin-top:8px;color:var(--muted)}.header-actions{display:flex;align-items:center;gap:12px;font-size:13px}.header-actions form{margin:0}.draft-banner{background:var(--gold);color:var(--gold-ink);padding:10px 20px;text-align:center;font-size:13px}.layout{display:grid;grid-template-columns:280px minmax(0,1fr);max-width:1420px;margin:auto}.layout aside{padding:25px 18px;min-width:0;border-right:1px solid var(--line)}#course-nav{position:sticky;top:16px;max-height:calc(100vh - 32px);overflow:auto;padding-right:8px}#course-nav a{display:block;padding:9px 10px;margin:3px 0;border-radius:4px;text-decoration:none;font-size:13px;line-height:1.4;border:1px solid transparent}#course-nav a:hover{background:var(--soft)}#course-nav a[aria-current=page]{background:var(--paper);border-color:var(--line);font-weight:750}.nav-group{margin:18px 0 6px;font-size:10px;font-weight:800;text-transform:uppercase;letter-spacing:.09em;color:var(--muted)}.nav-id{display:block;font-size:10px;color:var(--muted)}.nav-status{float:right;font-size:12px;color:var(--good)}#content{padding:34px clamp(20px,4vw,58px) 60px;min-width:0;min-height:70vh;outline:none}.eyebrow{font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);font-weight:800}h1,h2,h3{line-height:1.2}h1{font-family:Georgia,serif;font-size:clamp(32px,4vw,47px);font-weight:700;margin:10px 0 20px;letter-spacing:-.6px}h2{font-size:23px;margin:30px 0 13px}h3{font-size:18px;margin:25px 0 10px}p{margin:0 0 17px}.lead{font-size:17px;color:var(--muted);max-width:76ch}.small{font-size:12px;color:var(--muted)}.card,.lesson,.exercise,.review-panel,.quiz,.result{background:var(--paper);border:1px solid var(--line);padding:clamp(20px,3vw,30px);border-radius:6px;margin:20px 0}.lesson{border-top:4px solid var(--ink)}.lesson p{max-width:85ch}.lesson h2:first-child{margin-top:0}.notice{padding:14px 18px;border-left:3px solid var(--focus);background:var(--soft);font-size:14px}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:24px 0}.stat{padding:15px 20px;background:var(--paper);border:1px solid var(--line);border-radius:5px}.stat strong{display:block;font:700 31px/1.2 Georgia,serif}.stat span{font-size:12px;color:var(--muted)}.tools{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin:20px 0}.unit-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.unit-card{display:block;background:var(--paper);border:1px solid var(--line);border-radius:5px;padding:18px;text-decoration:none}.unit-card:hover{border-color:var(--ink)}.unit-card strong{display:block;font-size:16px;margin:5px 0}.unit-card small{color:var(--muted)}.unit-card .unit-id{font-size:10px;letter-spacing:.05em}.tag{font-size:11px;display:inline-block;padding:3px 7px;border:1px solid var(--line);border-radius:4px;color:var(--muted)}.tag.good{color:var(--good)}.objectives{padding-left:24px;margin:10px 0 24px}.objectives li,.steps li{padding:5px 0}.steps{padding-left:25px}.section-ref{display:inline-block;font-size:11px;color:var(--muted)}details{border:1px solid var(--line);padding:14px 18px;margin:18px 0;background:var(--soft);border-radius:4px}summary{cursor:pointer;font-weight:700}details p{margin:14px 0 0}.sources{font-size:13px}.sources a{display:block;overflow-wrap:anywhere;margin:6px 0}.pagination{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin:30px 0}.review-panel label{font-size:13px;font-weight:700;display:block;margin:10px 0 6px}textarea,input[type=search],input[type=password],select{display:block;width:100%;min-height:45px;border:1px solid var(--line);border-radius:4px;background:var(--paper);color:var(--ink);padding:10px 12px}textarea{resize:vertical;min-height:125px}.review-panel .save{font-size:12px;color:var(--muted);margin-top:8px;min-height:20px}.review-panel select{max-width:300px}.quiz fieldset{padding:0;border:0;margin:0 0 28px}.quiz legend{font-weight:700;line-height:1.5;margin-bottom:12px}.quiz label.choice{display:flex;align-items:flex-start;gap:10px;border:1px solid var(--line);padding:12px;margin:8px 0;border-radius:5px;cursor:pointer;min-height:47px;font-size:14px}.quiz input[type=radio]{flex-shrink:0;margin-top:5px;width:17px;height:17px;accent-color:var(--ink)}.quiz label.choice:has(input:checked){background:var(--soft);border-color:var(--ink)}.error{color:var(--bad);font-weight:650}.good{color:var(--good)}.result-item{border-top:1px solid var(--line);padding:17px 0}.result-item p{font-size:14px;margin:7px 0}.score{font:700 42px Georgia,serif}.result .notice{margin-top:15px}.table-scroll{max-width:100%;overflow-x:auto}table{width:100%;border-collapse:collapse;font-size:13px}th,td{text-align:left;padding:11px;border-bottom:1px solid var(--line);vertical-align:top}th{background:var(--soft)}.worksheet{padding-bottom:20px;border-bottom:1px solid var(--line);margin:25px 0}.worksheet li{padding:5px 0}.search-label{display:block;font-size:13px;font-weight:700;margin-bottom:7px}.empty{padding:20px;background:var(--soft)}.login{min-height:75vh;display:grid;place-items:center;padding:35px 20px}.login .card{max-width:560px;width:100%;border-top:4px solid var(--ink)}.login h1{font-size:37px}.login label{display:block;font-weight:700;margin-top:20px}.login input[type=password]{margin:8px 0 15px}.login .small{margin-top:25px}footer{padding:22px;text-align:center;font-size:11px;color:var(--muted);border-top:1px solid var(--line)}#session-notice{padding:15px 25px;background:var(--paper);border-bottom:2px solid var(--bad)}.skip{position:absolute;transform:translateY(-150%);left:12px;background:var(--ink);color:var(--paper);padding:10px;z-index:10}.skip:focus{transform:none}.mobile-menu{display:none}.read-status{font-size:12px;color:var(--muted)}
@media(max-width:850px){header{padding:15px 18px}.brand{font-size:21px}.brand small{font-size:8px}.header-actions{gap:6px}.header-actions a{display:none}.layout{display:block}.layout aside{border-right:0;border-bottom:1px solid var(--line);padding:10px 18px}.mobile-menu{display:inline-flex}#course-nav{display:none;position:static;max-height:55vh;margin-top:10px}#sidebar.expanded #course-nav{display:block}#content{padding:23px 18px 45px}.stats{gap:8px}.stat{padding:12px}.stat strong{font-size:27px}.stat span{font-size:11px}.draft-banner{font-size:11px;padding:9px 14px}.unit-grid{grid-template-columns:1fr}h1{font-size:34px}.lesson,.quiz,.review-panel{padding:20px}.tools button,.tools .button{flex-grow:1}.pagination .button{font-size:12px}.header-actions button{font-size:12px;padding:7px 10px}}
@media print{header,.draft-banner,aside,footer,.tools,.pagination,.review-panel,.quiz,button,.skip,#session-notice{display:none!important}.layout{display:block}body,#content{background:white;color:black;padding:0;margin:0}.card,.lesson,.exercise{border:0;box-shadow:none;padding:0;break-inside:auto}h1{font-size:25px}h2{font-size:19px;break-after:avoid}.notice{border:1px solid #777;background:white}.lesson p,.sources{font-size:11pt}a{color:black}details{display:block;border:1px solid #aaa}.stats{display:none}article{break-before:page}article:first-child{break-before:auto}}

/* Two-track private training hub */
.layout.hub-layout{display:block;max-width:1060px}.layout.hub-layout #content{min-height:60vh;padding:clamp(24px,4vw,54px)}
#sidebar[hidden]{display:none!important}
.track-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin:28px 0}
.track-card{display:flex;flex-direction:column;min-height:335px;padding:clamp(23px,3vw,34px);background:var(--paper);border:1px solid var(--line);border-top:5px solid var(--ink);border-radius:8px;color:var(--ink);text-decoration:none;transition:border-color .2s ease,transform .2s ease}
.track-card:hover,.track-card:focus-visible{border-color:var(--focus);transform:translateY(-2px)}
.track-card-top{display:flex;align-items:center;gap:12px}.track-number{font-family:Georgia,serif;font-size:28px;font-weight:700}
.track-card h2{font-family:Georgia,serif;font-size:clamp(24px,2.6vw,32px);margin:21px 0 13px}
.track-card p{color:var(--muted);font-size:15px;line-height:1.65}.track-meta{display:flex;flex-wrap:wrap;gap:10px 18px;margin:10px 0 22px;font-size:12px;color:var(--muted)}
.track-cta{margin-top:auto;font-size:14px;font-weight:800;border-top:1px solid var(--line);padding-top:17px}.track-progress{font-size:12px!important;color:var(--good)!important}
.hub-note{background:var(--paper);border:1px solid var(--line);padding:23px 30px;border-radius:6px;margin:28px 0}.hub-note h2{margin-top:0}.home-return{display:inline-block;margin:15px 0}
.breadcrumbs{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:12px;color:var(--muted);margin-bottom:20px}.nav-home{font-weight:800;background:var(--soft)}.nav-track{font-weight:800;font-size:12px;margin:14px 10px}
.progress-panel{background:var(--paper);border:1px solid var(--line);border-radius:6px;padding:22px;margin:24px 0}.progress-heading,.progress-actions{display:flex;gap:14px;align-items:center;justify-content:space-between;flex-wrap:wrap}.progress-heading .eyebrow{margin:0}.progress-panel progress{width:100%;height:12px;accent-color:var(--ink);margin:12px 0 16px}.progress-actions{justify-content:flex-start;font-size:13px}.progress-actions .button{max-width:100%;white-space:normal;text-align:left}
.unit-description{color:var(--muted);font-size:13px;line-height:1.55;margin:11px 0}.unit-tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}.tag{font-size:11px;border:1px solid var(--line);padding:3px 8px;border-radius:999px}.unit-id{display:block;font-size:10px;letter-spacing:.06em;font-weight:750;color:var(--muted)}
.lesson-progress{display:flex;gap:15px;flex-wrap:wrap;justify-content:space-between;font-size:12px;color:var(--muted);padding:12px 0;border-bottom:1px solid var(--line)}
.scenario{border-top:1px solid var(--line);margin-top:20px;padding-top:16px}.scenario h2{margin-top:4px}.read-controls{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin:20px 0}
@media(max-width:760px){.track-grid{grid-template-columns:1fr}.track-card{min-height:260px}.layout.hub-layout #content{padding:24px 18px 45px}.hub-note{padding:18px 20px}.progress-panel{padding:16px}.breadcrumbs{margin-bottom:16px}}
@media print{.track-grid,.hub-note,.breadcrumbs,.progress-panel,.read-controls,.lesson-progress{display:none!important}}