:root{color-scheme:light;--bg:#f6f9fd;--surface:#fff;--text:#24333d;--muted:#62727e;--line:#dbe5eb;--accent:#4c9d89;--strong:#276b5b;--soft:#dff3ec;--tint:#eff9f5;--warning:#fff4cf;--shadow:0 16px 38px rgba(84,112,136,.1);--radius:16px;--control:10px;--max:1360px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:92px}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.55 'Avenir Next',Avenir,'Segoe UI',system-ui,sans-serif;-webkit-font-smoothing:antialiased}button,input,textarea,select{font:inherit}button,a,input,summary{ -webkit-tap-highlight-color:transparent}button,a,summary,input,textarea,select{outline-offset:4px}button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid #317f6d}button{cursor:pointer}button:disabled{opacity:.45;cursor:default}button:active:not(:disabled){transform:translateY(1px)}button{transition:background-color .15s,color .15s}a{color:var(--strong);text-underline-offset:3px}h1,h2,h3,p{margin-top:0}h2,h3{text-wrap:balance}p{text-wrap:pretty}small{font-size:12px}strong{font-weight:700}[hidden]{display:none!important}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;top:8px;left:8px;z-index:20;transform:translateY(-180%);background:var(--strong);color:white;padding:10px 14px;border-radius:10px}.skip-link:focus{transform:none}
.site-header{position:sticky;top:0;z-index:5;border-bottom:1px solid var(--line);background:rgba(255,255,255,.95);backdrop-filter:blur(14px)}.header-inner{max-width:var(--max);width:calc(100% - 48px);min-height:76px;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--text);flex:none}.brand-mark{height:40px;width:40px;border-radius:11px;display:grid;place-items:center;background:var(--accent);color:#fff;font-size:14px;font-weight:800}.brand strong{display:block;font-size:17px;letter-spacing:-.03em;line-height:1.2}.brand small{color:var(--muted);font-size:11px;letter-spacing:.02em}.header-actions{display:flex;align-items:center;gap:16px}.text-button{border:0;background:transparent;color:var(--strong);font-size:13px;font-weight:650;min-height:44px;padding:8px 4px;text-decoration:none;display:inline-flex;align-items:center;gap:6px}.text-button:hover{color:#164737;text-decoration:underline}.icon-button{display:inline-grid;place-items:center;min-width:40px;min-height:40px;padding:4px;border:1px solid var(--line);border-radius:10px;color:var(--muted);background:var(--surface);font-size:22px;line-height:1}.icon-button:hover{background:var(--soft);color:var(--strong)}.language-switch{display:flex;gap:2px;padding:3px;background:#edf4f7;border:1px solid var(--line);border-radius:24px}.language-switch button{min-height:34px;min-width:39px;padding:0 8px;font-size:11px;font-weight:800;color:var(--muted);border:0;border-radius:20px;background:transparent}.language-switch button[aria-pressed=true]{background:white;color:var(--strong);box-shadow:0 2px 7px #39596716}
main{width:calc(100% - 48px);max-width:var(--max);margin:auto}.intro{padding:32px 0}.search-panel{background:var(--tint);border:1px solid #cfe6de;border-radius:var(--radius);padding:24px 28px;box-shadow:var(--shadow)}.search-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:16px}.search-panel label{font-size:clamp(22px,2.5vw,28px);font-weight:750;letter-spacing:-.035em}.search-kicker{color:var(--strong);font-size:10px;font-weight:700;letter-spacing:.1em}.search-field{display:flex;align-items:center;gap:12px;background:white;border:1px solid #a5bab1;border-radius:var(--control);padding:0 16px}.search-field:focus-within{outline:3px solid #317f6d30;border-color:#317f6d}.search-field svg{width:22px;height:22px;color:var(--strong);flex:none}.search-field input{border:0;min-width:0;width:100%;height:60px;font-size:16px;color:var(--text);background:none;outline:none}.search-panel p{font-size:12px;color:var(--muted);margin:10px 0 0}.workspace{display:grid;grid-template-columns:260px minmax(0,1fr);gap:40px;padding-bottom:64px}.sidebar{position:sticky;top:100px;max-height:calc(100dvh - 124px);overflow:auto;scrollbar-width:thin;padding-right:4px}.sidebar-heading{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:12px}.sidebar-heading h2{font-size:16px;margin:0;letter-spacing:-.02em}.small{font-size:11px}.course-link{display:grid;grid-template-columns:32px 1fr auto;gap:10px;align-items:center;text-decoration:none;color:var(--text);padding:12px 10px;border:1px solid transparent;border-radius:12px;margin-bottom:4px}.course-link:hover{background:#edf3f4}.course-link[aria-current=page]{background:var(--soft);border-color:#c9e3d9}.course-link .course-symbol{width:30px;height:30px;border-radius:9px;display:grid;place-items:center;background:var(--surface);font-size:11px;font-weight:750;color:var(--strong);border:1px solid #e0e9e7}.course-link strong{display:block;font-size:13px;line-height:1.3}.course-link small{display:block;font-size:10px;color:var(--muted);margin-top:2px}.course-count{font-size:10px;color:var(--muted);font-variant-numeric:tabular-nums}.total-progress{margin:20px 10px 20px;padding-top:16px;border-top:1px solid var(--line)}.total-progress>div{display:flex;justify-content:space-between;font-size:12px}.total-progress small{color:var(--muted);font-size:11px}.total-progress progress{display:block;width:100%;height:6px;margin:10px 0;border:0;border-radius:9px;overflow:hidden;background:#e0e9e7;accent-color:var(--accent)}progress::-webkit-progress-bar{background:#e0e9e7}progress::-webkit-progress-value{background:var(--accent);border-radius:9px}progress::-moz-progress-bar{background:var(--accent)}.chapter-index{border-top:1px solid var(--line);padding:12px 4px}.chapter-index>summary{cursor:pointer;color:var(--muted);font-size:12px;font-weight:650;padding:4px}.index-link{display:flex;align-items:baseline;gap:8px;color:var(--muted);text-decoration:none;border-radius:8px;padding:7px;font-size:11px;line-height:1.4}.index-link:hover{background:var(--soft);color:var(--strong)}.index-link span{font-variant-numeric:tabular-nums;color:var(--strong);min-width:20px}.local-hint{font-size:11px;line-height:1.5;color:var(--muted);padding:8px 10px;margin:0}
.continue-panel{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:16px 20px;border:1px solid #cfe6de;background:#edf8f4;border-radius:12px;margin-bottom:28px}.continue-panel small{display:block;color:var(--strong);font-size:10px;font-weight:750;letter-spacing:.06em;text-transform:uppercase}.continue-panel p{margin:3px 0 0;font-size:14px;font-weight:650}.continue-panel button{white-space:nowrap}.primary-button,.secondary-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:42px;padding:10px 16px;border-radius:var(--control);font-size:12px;font-weight:700;text-decoration:none}.primary-button{border:1px solid var(--strong);background:var(--strong);color:#fff}.primary-button:hover{background:#1d5447}.secondary-button{border:1px solid var(--line);background:var(--surface);color:var(--text)}.secondary-button:hover{background:var(--soft);border-color:#afcfc4}.course-heading{margin-bottom:22px}.eyebrow{display:block;color:var(--strong);font-size:11px;font-weight:750;letter-spacing:.06em;margin-bottom:8px}.course-heading h2{font-size:28px;letter-spacing:-.04em;line-height:1.2;margin-bottom:8px}.course-heading p{color:var(--muted);font-size:14px;max-width:720px;margin-bottom:12px}.course-meta{display:flex;gap:16px;flex-wrap:wrap;font-size:11px;color:var(--muted)}.course-meta strong{color:var(--text)}.filter-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-bottom:22px}.filters{display:flex;flex-wrap:wrap;gap:4px}.filter-button{min-height:34px;border:0;border-radius:8px;background:transparent;padding:6px 10px;color:var(--muted);font-size:11px;font-weight:650}.filter-button:hover{background:#edf3f4}.filter-button[aria-pressed=true]{background:var(--soft);color:var(--strong)}#result-count{font-size:11px;color:var(--muted);white-space:nowrap}.chapter-heading{display:flex;align-items:baseline;gap:10px;margin:26px 0 12px}.chapter-heading:first-child{margin-top:0}.chapter-heading>span{color:var(--strong);font-size:10px;font-weight:750;white-space:nowrap}.chapter-heading h3{font-size:13px;margin:0;font-weight:650;color:var(--muted)}.task-card{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);margin-bottom:12px;box-shadow:0 6px 20px #5470880b;overflow:clip;scroll-margin-top:100px}.task-card[open]{border-color:#b3d3c7;box-shadow:var(--shadow)}.task-summary{display:grid;grid-template-columns:42px minmax(0,1fr) auto;align-items:center;gap:14px;min-height:94px;padding:18px 20px;cursor:pointer;list-style:none}.task-summary::-webkit-details-marker{display:none}.task-summary:hover{background:#f9fcfc}.task-number{width:42px;height:42px;border-radius:12px;background:var(--soft);color:var(--strong);display:grid;place-items:center;font-size:13px;font-weight:800;font-variant-numeric:tabular-nums}.task-summary h3{font-size:17px;line-height:1.35;letter-spacing:-.025em;margin:0 0 4px}.task-subtitle{font-size:11px;color:var(--muted)}.card-status{display:flex;gap:10px;align-items:center;font-size:11px;font-weight:650;color:var(--muted);white-space:nowrap}.card-chevron{font-size:18px;font-weight:400;transition:transform .18s}.task-card[open] .card-chevron{transform:rotate(90deg)}.task-card.is-complete .task-number{background:#d9f0e4}.task-card.is-complete .card-status{color:var(--strong)}.task-card[data-course=S4D401] .task-number{background:#eee8fb;color:#5d497d}.task-card[data-course=S4D430] .task-number{background:#e5f1ff;color:#365f88}.task-card[data-course=S4D437] .task-number{background:#fff1cb;color:#72591b}.task-card[data-course=BTP100] .task-number{background:#e8edf3;color:#506172}.task-content{border-top:1px solid var(--line);padding:22px 24px 24px 76px}.task-tools{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px;margin-bottom:16px}.source-links{display:flex;gap:8px;flex-wrap:wrap}.source-link{display:inline-flex;gap:6px;align-items:center;min-height:34px;padding:6px 10px;border:1px solid var(--line);border-radius:8px;background:#f8fafb;color:var(--strong);text-decoration:none;font-size:11px;font-weight:650}.source-link:hover{background:var(--soft)}.bookmark{border:0;background:none;color:var(--muted);font-size:11px;min-height:38px;cursor:pointer}.bookmark[aria-pressed=true]{color:var(--strong);font-weight:750}.explanation{font-size:14px;line-height:1.7;margin-bottom:18px}.mini-label{font-size:10px;font-weight:750;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);display:block;margin-bottom:7px}.task-note{font-size:12px;line-height:1.6;border-left:3px solid #c38d16;background:var(--warning);color:#6d5417;padding:12px 14px;border-radius:0 10px 10px 0;margin:16px 0}.dependency{font-size:11px;color:var(--muted);margin-bottom:16px}.dependency a{text-decoration-style:dotted}.objects{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:20px}.object-copy{max-width:100%;overflow-wrap:anywhere;border:1px solid var(--line);background:#f6f9fb;color:#365f70;border-radius:7px;min-height:34px;padding:5px 9px;font:11px/1.5 ui-monospace,SFMono-Regular,Consolas,monospace}.object-copy:hover{background:var(--soft)}.steps{list-style:none;padding:0;margin:0}.step{border-top:1px solid #e7edf1;padding:16px 0}.step-label{display:flex;align-items:flex-start;gap:12px;font-size:13px;font-weight:650;cursor:pointer;line-height:1.55}.step input[type=checkbox]{accent-color:var(--strong);width:18px;height:18px;flex:none;margin:2px 0 0;cursor:pointer}.step:has(input:checked) .step-label{color:var(--strong)}.step:has(input:checked){background:linear-gradient(90deg,transparent,#f5fbf8)}.step-body{margin:7px 0 0 30px;color:var(--muted);font-size:12px;line-height:1.7;overflow-wrap:anywhere}.step-details{margin:8px 0 0 30px}.step-details summary,.solution summary,.note-area summary{font-size:11px;color:var(--strong);cursor:pointer;padding:5px 0;min-height:30px}.step-details ol{font-size:12px;line-height:1.7;padding-left:20px;color:var(--text)}.step-details li{margin:10px 0;overflow-wrap:anywhere}.step-details .source-caption{color:var(--muted);font-size:10px}.optional{font-size:10px;color:var(--muted);font-weight:400}.step.is-check{background:#f0f8f4;padding:14px;border-radius:10px;margin:8px 0 20px;border:0}.note-area,.solution{margin-top:8px;border-top:1px solid var(--line);padding-top:10px}.note-area label{font-size:12px}.note-area textarea{display:block;width:100%;min-height:104px;resize:vertical;border:1px solid var(--line);border-radius:10px;padding:12px;color:var(--text);font-size:13px;background:#f8fafb;margin:8px 0}.saved-label{font-size:10px;color:var(--muted)}.task-bottom{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:16px}.task-bottom p{font-size:11px;color:var(--muted);margin:0}.code-example{background:#f4f8fa;border:1px solid var(--line);border-radius:10px;padding:14px;overflow:auto;white-space:pre;font:12px/1.7 ui-monospace,monospace}.setup-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:18px}.setup-grid div{padding:10px 12px;background:#f5f9f8;border-radius:8px;font-size:11px}.setup-grid strong{display:block;color:var(--strong);font-size:12px}#empty-state{text-align:center;padding:56px 24px;color:var(--muted)}#empty-state h3{color:var(--text)}footer{max-width:var(--max);width:calc(100% - 48px);margin:auto;border-top:1px solid var(--line);padding:22px 0;display:flex;justify-content:space-between;gap:16px;font-size:11px;color:var(--muted)}
dialog{color:var(--text);border:1px solid var(--line);border-radius:20px;box-shadow:0 28px 90px #172d3940;background:var(--surface);padding:0}dialog::backdrop{background:#263f4a66;backdrop-filter:blur(3px)}body:has(dialog[open]){overflow:hidden}#panel{width:min(800px,calc(100% - 32px));max-height:calc(100dvh - 48px)}.panel-header{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 24px;border-bottom:1px solid var(--line);position:sticky;top:0;background:white;z-index:1}.panel-header h2{font-size:21px;letter-spacing:-.03em;margin:0}#panel-body{padding:24px}.panel-intro{font-size:14px;color:var(--muted)}.panel-section{padding:20px 0;border-top:1px solid var(--line)}.panel-section h3{font-size:15px;margin-bottom:8px}.panel-section p{font-size:13px;color:var(--muted)}.plan-row{display:grid;grid-template-columns:90px 1fr auto;gap:16px;padding:18px 0;border-bottom:1px solid var(--line);align-items:center}.plan-row strong{font-size:13px}.plan-row h3{font-size:15px;margin:0}.plan-row small{color:var(--muted)}.library-group h3{font-size:14px;margin:24px 0 8px}.doc-row{display:flex;justify-content:space-between;gap:16px;align-items:center;padding:12px 0;border-bottom:1px solid var(--line)}.doc-row strong{display:block;font-size:13px}.doc-row small{display:block;color:var(--muted);font-size:11px;overflow-wrap:anywhere}.doc-row .source-link{white-space:nowrap}.form-row{margin:16px 0}.form-row label{display:block;font-size:12px;font-weight:650;margin-bottom:6px}.form-row input{display:block;border:1px solid #b8c9c5;background:#f7faf9;border-radius:10px;width:100%;height:44px;padding:10px 12px;color:var(--text);font-size:14px}.form-row small{color:var(--muted);display:block;margin-top:6px}.form-actions{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-top:16px}.service-url{overflow-wrap:anywhere;font-size:12px;background:#f2f7f5;border-radius:10px;padding:14px}.danger{color:#a23d3d;border-color:#e7c5c5}.storage-warning{background:var(--warning);color:#6d5417;font-size:12px;padding:12px;border-radius:10px}.glossary-row{display:grid;grid-template-columns:120px 1fr;gap:16px;margin:12px 0;font-size:13px}.glossary-row dd{margin:0;color:var(--muted)}
#pdf-viewer{width:calc(100% - 24px);height:calc(100dvh - 24px);max-width:none;max-height:none;border-radius:14px;overflow:hidden}#pdf-viewer[open]{display:flex;flex-direction:column}.pdf-toolbar{padding:14px 18px;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;border-bottom:1px solid var(--line);flex:none}.pdf-heading h2{font-size:14px;margin:0}.pdf-heading span{font-size:11px;color:var(--muted)}.pdf-controls,.pdf-actions{display:flex;align-items:center;gap:8px}.pdf-controls input{width:70px;height:40px;border:1px solid var(--line);border-radius:8px;padding:8px;font-size:13px}.pdf-controls output,.pdf-controls>span{font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}.pdf-actions .text-button,.pdf-actions button{font-size:11px}#pdf-scroll{flex:1;min-height:0;overflow:auto;background:#e8eef1;padding:24px}#pdf-status{text-align:center;font-size:13px;color:var(--muted)}#pdf-sheet{position:relative;margin:0 auto;background:white;box-shadow:0 4px 20px #20364220}#pdf-sheet canvas{display:block}.textLayer{position:absolute;inset:0;overflow:clip;opacity:1;line-height:1;text-align:initial;text-size-adjust:none;forced-color-adjust:none;transform-origin:0 0;caret-color:CanvasText;z-index:2}.textLayer :is(span,br){color:transparent;position:absolute;white-space:pre;cursor:text;transform-origin:0 0}.textLayer> :not(.markedContent),.textLayer .markedContent span:not(.markedContent){z-index:1}.textLayer span.markedContent{top:0;height:0}.textLayer ::selection{background:#387dc659}.textLayer .endOfContent{display:block;position:absolute;inset:100% 0 0;z-index:0;cursor:default;user-select:none}#pdf-dock{position:fixed;bottom:20px;left:24px;background:white;border:1px solid #b3d3c7;box-shadow:var(--shadow);border-radius:12px;display:flex;align-items:center;z-index:6;max-width:calc(100% - 48px);padding:5px}#pdf-restore{display:flex;align-items:center;gap:12px;text-align:left;border:0;background:none;padding:8px;color:var(--text);font-size:12px}.dock-label{background:var(--soft);padding:8px;border-radius:8px;color:var(--strong);font-size:10px;font-weight:800}#pdf-dock-title{max-width:200px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}#feedback{position:fixed;bottom:24px;right:24px;max-width:min(380px,calc(100% - 48px));padding:12px 18px;background:var(--strong);color:white;box-shadow:var(--shadow);border-radius:12px;font-size:12px;z-index:30;opacity:0;pointer-events:none;transform:translateY(12px);transition:opacity .18s,transform .18s}#feedback.visible{opacity:1;transform:none}.noscript{padding:24px;background:var(--warning)}
@media(min-width:1500px){.workspace{gap:48px}.intro{padding:40px 0}.search-panel{padding:28px 32px}.search-field input{height:64px}}
@media(max-width:1050px){.header-actions{gap:8px}.workspace{grid-template-columns:226px minmax(0,1fr);gap:28px}.task-content{padding-left:24px}.search-kicker{display:none}.card-status .status-label{display:none}}
@media(max-width:900px){.workspace{display:block}.sidebar{position:static;max-height:none;overflow:visible;padding:0;margin-bottom:24px}.sidebar-heading{margin-bottom:6px}#courses{display:flex;overflow-x:auto;gap:8px;padding:0 0 8px}.course-link{min-width:190px;margin:0;border-color:var(--line);background:#ffffff80}.course-link .course-count{display:none}.total-progress{margin:8px 0 0;padding:12px 0;display:grid;grid-template-columns:1fr 1fr;gap:4px 20px}.total-progress progress{align-self:center;margin:0}.total-progress small{grid-column:1 / -1}.chapter-index,.local-hint{display:none}.continue-panel{margin-bottom:24px}.header-actions .text-button{font-size:11px}.brand strong{font-size:15px}.brand small{display:none}.course-heading h2{font-size:25px}}
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@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important;animation:none!important}}
@media print{.site-header,.sidebar,.intro,.filter-bar,.continue-panel,footer,.task-tools,.note-area,.task-bottom,#pdf-dock,#feedback{display:none!important}.workspace{display:block}.task-card{break-inside:avoid;box-shadow:none}.task-content{padding:16px}.task-card:not([open]){display:none}main{width:100%}}

.clipboard-buffer{position:fixed;top:0;left:0;width:1px;height:1px;opacity:0}