/* Derived from docs/web_template theme-luma and floating workspace layout. */
:root{--accent:#526747;--accent-soft:#e9eee4;--ink:#242721;--muted:#6f726a;--paper:#fffefa;--line:#e0e2da}
*{box-sizing:border-box}html{min-height:100%;background:var(--workspace);scroll-behavior:smooth}body{margin:0;color:var(--ink);font:15px/1.65 var(--font-sans);-webkit-font-smoothing:antialiased}button,input{font:inherit;color:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button{border:0}a{color:inherit;text-decoration:none}svg{flex-shrink:0;vertical-align:middle}button:disabled{cursor:default}button[hidden]{display:none!important}:focus-visible{outline:3px solid #759968;outline-offset:4px}.skip{position:fixed;top:-60px;left:20px;z-index:100;background:white;padding:12px}.skip:focus{top:10px}.sidebar{position:fixed;inset:16px auto 16px 16px;z-index:10;width:222px;padding:24px 13px 15px;border:1px solid var(--border-subtle);border-radius:var(--radius-shell);background:var(--surface-panel);box-shadow:var(--shadow-panel);display:flex;flex-direction:column}.brand{display:flex;align-items:center;gap:13px;padding:5px 12px 29px;font-size:20px;font-weight:650;letter-spacing:-.03em}.brand img{height:36px;width:28px;object-fit:contain}.brand small{display:block;font-size:11px;font-weight:450;color:var(--muted);letter-spacing:.12em;margin-top:2px}.sidebar nav{display:grid;gap:7px;padding-top:23px;border-top:1px solid var(--line)}.nav-item{display:flex;align-items:center;gap:11px;min-height:46px;width:100%;padding:10px 14px;border-radius:13px;background:transparent;text-align:left;color:#666b60;transition:background 160ms,color 160ms}.nav-item:hover{background:var(--surface-hover)}.nav-item.active{background:#242721;color:white}.count{margin-left:auto;background:var(--accent-soft);color:var(--accent);font-size:12px;min-width:21px;text-align:center;border-radius:6px}.sidebar-bottom{margin-top:auto}.side-note{padding:20px 15px;margin-bottom:20px;border-top:1px solid var(--line);font-size:14px}.side-note small{display:block;color:var(--muted);font-size:12px;line-height:1.8;margin-top:8px}.local-note{display:block;margin:16px 10px 0;font-size:10px;color:var(--muted)}#main{margin-left:263px;padding:28px 42px 80px 16px;min-height:100vh;outline:none}.topbar{display:flex;justify-content:space-between;color:#74776e;font-size:12px;margin-bottom:32px}.slash{margin:0 10px;color:#adb0a6}.top-note{font-size:11px}.page-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:34px}.eyebrow{color:var(--accent);font-size:11px;letter-spacing:.1em;font-weight:650;margin:0 0 12px}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(28px,3.2vw,44px);line-height:1.35;letter-spacing:-.04em;font-weight:620;margin-bottom:14px}h2{font-size:22px;line-height:1.4;letter-spacing:-.02em;font-weight:620}h3{font-size:17px;line-height:1.55;font-weight:600}.page-heading p:not(.eyebrow),.course-intro p{color:var(--muted);margin-bottom:0}.edition{font-size:11px;white-space:nowrap;padding-bottom:6px;color:var(--muted)}.course-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.course-card{border:1px solid var(--line);background:var(--paper);border-radius:22px;overflow:hidden;transition:transform 220ms,box-shadow 220ms}.course-card:hover{transform:translateY(-3px);box-shadow:0 13px 27px #2427210a}.course-cover{position:relative;display:block;padding:25px 18px 0;border-bottom:1px solid var(--line)}.course-cover.computer,.intro-visual.computer{background:#e6ebe0}.course-cover.ai,.intro-visual.ai{background:#eee8dd}.course-cover svg{width:100%;height:170px}.cover-label{font-size:11px;letter-spacing:.04em;position:absolute;top:18px;left:22px;color:#5d6655}.course-copy{padding:24px 26px 26px}.course-meta{display:flex;justify-content:space-between;gap:10px;font-size:11px;color:var(--muted);margin-bottom:13px}.course-copy h2{font-size:25px;margin-bottom:10px}.course-copy>p{color:#676c60;font-size:14px;line-height:1.8;min-height:50px;margin-bottom:21px}.dependency{display:flex;align-items:center;gap:7px;font-size:11px;color:#6a7163;flex-wrap:wrap}.verified-text{color:var(--accent);font-weight:600}.course-actions{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--line);margin-top:20px;padding-top:20px}.button{min-height:44px;display:inline-flex;align-items:center;justify-content:center;gap:10px;border-radius:11px;padding:10px 20px;background:#242721;color:#fff;font-size:13px;font-weight:580;border:1px solid transparent;transition:transform 140ms,background 140ms}.button:hover{background:#3a4034;transform:translateY(-1px)}.button.secondary{border-color:#d7dbd0;background:transparent;color:var(--ink)}.button.secondary:hover{background:#edf0e8}.button-row{display:flex;align-items:center;flex-wrap:wrap;gap:12px}.text-link{display:inline-flex;align-items:center;gap:8px;background:transparent;padding:9px 0;color:var(--accent);font-size:13px;min-height:40px}.text-link:hover{text-decoration:underline;text-underline-offset:4px}.how{margin-top:48px}.how h2{font-size:20px}.how-grid{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid #d5d8ce;padding-top:23px}.how-grid>div{padding:0 23px;border-left:1px solid var(--line);position:relative}.how-grid>div:first-child{padding-left:0;border:0}.how-grid span{color:#89937e;font-size:11px}.how-grid h3{margin:8px 0}.how-grid p{font-size:13px;max-width:250px;color:var(--muted)}.resume{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 20px;background:#e8ede2;border-radius:12px;margin-bottom:22px;font-size:13px}.resume strong{margin-left:15px;font-weight:550}.back{display:inline-block;color:var(--muted);font-size:13px;margin-bottom:25px}.course-intro{display:grid;grid-template-columns:1.3fr 1fr;gap:40px;align-items:center;margin-bottom:34px}.course-intro .button-row{margin-top:25px}.intro-visual{border-radius:22px;overflow:hidden;padding:10px}.intro-visual svg{width:100%}.prereq{display:flex;gap:14px;align-items:center;background:#e9ece3;padding:17px 22px;border-radius:13px;margin-bottom:25px;color:#536047}.prereq strong{font-size:13px}.prereq p{font-size:12px;margin:3px 0 0}.prereq .text-link{margin-left:auto;white-space:nowrap}.prereq.satisfied{background:transparent;border:1px solid var(--line)}.outcome{display:grid;grid-template-columns:155px 1fr;gap:0 20px;border-top:1px solid #d6d9ce;border-bottom:1px solid #d6d9ce;padding:24px 0;margin:30px 0}.outcome .eyebrow{padding-top:5px}.outcome p{margin-bottom:6px}.outcome small{grid-column:2;font-size:11px;color:var(--muted)}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:18px}.section-heading h2,.section-heading .eyebrow{margin:0}.section-heading>span:last-child{font-size:12px;color:var(--muted)}.syllabus{margin-top:35px}.syllabus-row{display:flex;gap:22px;align-items:center;padding:23px 12px;border-top:1px solid var(--line);transition:background 160ms}.syllabus-row:hover{background:#fffefa99}.step-number{color:#8b9583;font-size:14px}.syllabus-row h3{margin:0 0 4px}.syllabus-row p{margin:0;font-size:12px;color:var(--muted)}.syllabus-row .status{margin-left:auto}.status{display:inline-block;font-size:11px;color:#72746c;white-space:nowrap;border:1px solid #d9dcd2;border-radius:6px;padding:3px 8px;font-weight:450}.status.verified{background:#e7eee1;border-color:#d5dfcd;color:#4b6340}.lesson-top{display:flex;justify-content:space-between;align-items:baseline;color:var(--muted);font-size:12px}.reading-layout{display:grid;grid-template-columns:180px minmax(0,1fr);gap:25px;align-items:start}.lesson-toc{position:sticky;top:24px;padding-top:14px}.lesson-toc>p{font-size:11px;color:var(--muted);margin:0 0 16px;padding-left:12px}.lesson-toc>a{display:flex;gap:12px;padding:13px 11px;margin:4px 0;font-size:12px;border-left:2px solid transparent;transition:background 150ms}.lesson-toc>a>span{font-size:10px;color:#899080;padding-top:2px}.lesson-toc>a small{display:block;color:#7c8374;font-size:10px;margin-top:4px}.lesson-toc>a.current{background:#e6ebe0;border-left-color:#677d56;border-radius:0 8px 8px 0}.toc-end{border-top:1px solid var(--line);margin-top:22px;padding-top:12px;padding-left:10px}.reading{background:var(--paper);border:1px solid var(--line);border-radius:20px;padding:40px clamp(24px,3.6vw,58px);min-width:0}.reading-head h1{font-size:clamp(27px,2.5vw,37px);margin:0 0 16px}.lead{font-size:17px;color:#777b70;line-height:1.8;margin-bottom:28px}.prose{font-size:16px;line-height:2;color:#3f4539}.prose p{margin-bottom:22px}.audio-block{padding:14px 0 20px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:25px 0 30px}.audio-label{display:flex;align-items:center;gap:8px;font-size:12px;margin-bottom:9px}.audio-label strong{font-weight:550}.audio-label small{margin-left:auto;color:var(--muted);font-size:10px}audio{width:100%;height:35px;margin-top:3px}.subtitle{font-size:12px;color:#69735e;min-height:21px;margin:8px 0 0}.demo{background:#f1f4ec;border-radius:16px;padding:24px;margin:30px 0;overflow:hidden}.demo-title{display:flex;align-items:center;gap:9px;color:#5b6a4e;margin-bottom:22px}.demo-title h2{font-size:15px;margin:0}.demo .button{font-size:12px;min-height:40px;padding:9px 14px}.flow{display:flex;align-items:center;justify-content:space-between;gap:8px;margin:22px 0 27px}.flow>div{display:flex;flex:1;flex-direction:column;align-items:center;gap:15px}.flow small{font-size:11px;color:#718062}.flow b{font-size:12px;font-weight:550}.flow strong{font-size:22px;height:32px;color:#4c623c}.diagram-arrow{color:#8a987e}.demo-feedback{font-size:13px;line-height:1.85;margin:14px 0 0;color:#526747}.compare{display:grid;grid-template-columns:1fr 1fr;gap:24px}.compare>div+div{border-left:1px solid #dce2d4;padding-left:24px}.compare small{font-size:11px;color:#6f7c61}.compare h3{font-size:15px;margin:10px 0}.compare p{font-size:13px;color:#6a7460;margin:0}.caption{color:var(--muted);font-size:11px;line-height:1.8;margin:16px 0 0}.file-tree{font-size:14px;background:#fffefa99;border-radius:8px;padding:16px}.file-tree summary{padding:7px 0;cursor:pointer}.file-tree details>div{padding-left:23px;border-left:1px solid #d8decf;margin-left:8px}.file-tree p{font-size:13px;padding-top:10px;margin-bottom:10px}.file-tree .muted{font-size:10px;margin-left:5px}.tag{font-size:9px;color:#78816e;border:1px solid #dbe0d3;margin-left:10px;padding:2px 5px;border-radius:4px}.save-example{padding:15px;border:1px solid #d5ddcd;border-radius:8px;margin-bottom:16px;background:#fffefa}.save-example>span{font-size:12px}.save-example strong{display:block;color:var(--accent);font-size:14px;margin:12px 0 6px}.save-example p{font-size:12px;margin:0;color:var(--muted)}.connection{font-size:12px;color:var(--accent)}.network-state .compare{margin:15px 0 20px;font-size:13px}.network-state strong{font-size:16px;line-height:2}.pattern-row{display:flex;align-items:center;justify-content:center;gap:13px;margin:20px 0 30px;flex-wrap:wrap}.apple{display:grid;place-items:center;width:65px;height:65px;border-radius:35% 35% 45% 45%;font-size:10px;position:relative}.apple:before{content:'';position:absolute;top:-7px;width:2px;height:10px;background:#6f795f}.apple.red{background:#edd7cb;color:#855842}.apple.green{background:#d9e4cb;color:#52683d}.prompt-example,.privacy-example{font-size:15px;line-height:1.9;background:#fffefa;border:1px solid #d9e0d0;padding:19px;border-radius:10px;margin-bottom:19px;min-height:78px}mark{background:#f4e1c1;padding:1px 3px}blockquote{font-size:18px;margin:12px 0 24px;line-height:1.8}blockquote small{display:block;font-size:11px;color:var(--muted);margin-top:12px}.example{border-left:2px solid #b9c5aa;padding-left:22px;margin:30px 0}.example>span{font-size:11px;color:var(--accent)}.example h2{font-size:18px;margin:8px 0 12px}.example p{font-size:15px;line-height:1.95;color:#565e4d}.takeaway{display:flex;gap:12px;align-items:flex-start;padding:20px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:28px 0;color:#4d6240}.takeaway p{margin:0;font-size:15px;line-height:1.8}.takeaway svg{margin-top:4px}.expand{border-bottom:1px solid var(--line);font-size:14px}.expand summary{display:flex;align-items:center;gap:10px;cursor:pointer;list-style:none;padding:19px 0;min-height:52px}.expand summary::-webkit-details-marker{display:none}.expand summary>span{margin-left:auto;color:#7a8670}.expand[open] summary>span{transform:rotate(45deg)}.expand>div{padding:4px 0 20px;animation:enter 180ms ease-out}.expand h3{font-size:16px;margin:0 0 10px}.expand p{font-size:15px;line-height:1.95;color:#5f6855;margin-bottom:0}.question{margin-top:36px;border-top:1px solid #cfd6c6;padding-top:29px}.question fieldset{border:0;padding:0;margin:0}.question legend{font-size:18px;line-height:1.7;font-weight:570;margin:6px 0 18px;display:block;width:100%}.options{display:grid;gap:10px}.option{position:relative;display:flex;align-items:center;gap:12px;padding:13px 16px;border:1px solid #dce1d4;border-radius:10px;font-size:14px;cursor:pointer;background:#fffefa;min-height:56px;transition:background 150ms,border-color 150ms}.option input{width:17px;height:17px;accent-color:var(--accent);margin:0;flex-shrink:0}.option-letter{font-size:11px;color:#869278}.option:has(input:checked){background:#edf2e6;border-color:#789064}.option.correct-option{border-color:#82956e;background:#eaf0e2}.option.wrong-option{border-color:#bd9c70;background:#f9f1e6}.option:has(input:disabled){cursor:default}.question-error{font-size:12px;color:#8c4f36;margin:8px 0;min-height:18px}.answer-feedback{display:none}.answer-feedback.visible{display:block;border-radius:12px;padding:20px;margin-top:20px;animation:enter 200ms ease-out}.answer-feedback.good{background:#eaf0e2;color:#405736}.answer-feedback.needs-work{background:#f7efe1;color:#755b32}.answer-feedback strong{font-size:15px}.answer-feedback p{font-size:14px;line-height:1.9;margin:8px 0 12px}.answer-feedback .button{display:flex;width:max-content;margin-top:16px;max-width:100%}.reading-footer{border-top:1px solid var(--line);margin-top:36px;padding-top:22px}.reading-footer>small{font-size:11px;color:var(--muted);display:block;margin-bottom:18px}.reading-footer .button-row{justify-content:space-between}.assessment-wrap{width:min(100%,780px);margin:0 auto;background:var(--paper);padding:36px 48px 40px;border-radius:22px;border:1px solid var(--line)}.assessment-wrap h1{font-size:31px}.assessment-wrap .question{border:0;padding-top:0;margin-top:30px}.muted{color:var(--muted)}.question-track{display:flex;gap:7px;margin-top:25px}.question-track span{height:4px;flex:1;background:#e3e7dc;border-radius:3px}.question-track .filled{background:#6e845a}.assessment-help{border-top:1px solid var(--line);margin-top:25px;padding-top:16px}.assessment-help>span{display:block;color:var(--muted);font-size:11px}.result{width:min(100%,810px);margin:10px auto;text-align:center}.result-symbol{display:grid;place-items:center;border-radius:50%;width:72px;height:72px;background:#e3ebda;color:#536f3f;margin:0 auto 25px}.result h1{font-size:32px}.result>p:not(.eyebrow){color:var(--muted);font-size:14px}.result-list{margin:30px 0;border-top:1px solid #d5dccd;text-align:left}.result-list>div{display:flex;align-items:center;gap:18px;border-bottom:1px solid var(--line);padding:17px 8px;font-size:14px}.result-list .status{margin-left:auto}.result .button-row{justify-content:center;margin-top:30px}.review-list{background:var(--paper);border:1px solid var(--line);border-radius:20px;padding:0 32px}.review-row{padding:29px 0;border-bottom:1px solid var(--line)}.review-row:last-child{border:0}.review-row h2{font-size:19px}.your-answer{font-size:13px;color:#8b704a}.review-explain{font-size:13px;color:#6b705f;margin:18px 0}.review-explain summary{cursor:pointer;min-height:32px}.review-explain p{line-height:1.9;padding:12px 0;margin:0}.empty{text-align:center;padding:70px 20px;color:var(--muted);border-top:1px solid var(--line)}.empty h2{margin-top:22px;color:var(--ink)}.empty p{font-size:14px;margin-bottom:24px}.map-courses{max-width:850px}.map-course{padding:28px;background:var(--paper);border:1px solid var(--line);border-radius:20px}.map-course h2{font-size:21px}.map-course ol{list-style:none;counter-reset:map;padding:0;margin:25px 0 0}.map-course li{counter-increment:map;display:flex;align-items:center;border-top:1px solid var(--line);padding:13px 0;gap:18px}.map-course li:before{content:'0' counter(map);color:#8b9581;font-size:12px}.map-course li a{flex:1;display:flex;align-items:center;justify-content:space-between;gap:15px;font-size:14px}.map-connector{padding:22px 28px;color:#718061;font-size:12px}.notice-inline{padding:16px 20px;background:#eee9de;border-radius:12px;color:#716043;font-size:13px}.loading{padding:90px;text-align:center}dialog{width:min(700px,calc(100% - 30px));max-height:85vh;overflow:auto;border:1px solid var(--line);border-radius:23px;background:var(--paper);color:var(--ink);padding:28px 35px;box-shadow:0 20px 80px #1a241a24}dialog::backdrop{background:#1e251a52;backdrop-filter:blur(3px)}.dialog-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:20px}.dialog-head .eyebrow{margin:0}.icon-button{display:grid;place-items:center;width:40px;height:40px;background:#efeee8;border-radius:50%}dialog>h2{font-size:25px;margin-bottom:25px}dialog>.button{margin-top:25px}.help-list{padding-left:24px;line-height:2.1}.help-list li{margin:10px 0}#notice{position:fixed;bottom:24px;left:50%;transform:translate(-50%,15px);padding:13px 22px;background:#242721;color:white;border-radius:12px;z-index:100;opacity:0;pointer-events:none;max-width:90vw;font-size:13px;transition:opacity 200ms,transform 200ms}#notice.show{opacity:1;transform:translate(-50%,0)}#main>*:not(.topbar){animation:enter 220ms ease-out}@keyframes enter{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:none}}
@media(min-width:1500px){#main{max-width:1530px;margin-right:auto;padding-left:40px;padding-right:60px}.reading{padding:46px 65px}.reading-layout{gap:40px}}
@media(max-width:1120px){.sidebar{width:190px}.brand{font-size:18px;gap:10px}#main{margin-left:222px;padding-right:25px}.course-copy{padding:20px}.course-cover svg{height:180px}.reading-layout{grid-template-columns:150px minmax(0,1fr);gap:16px}.lesson-toc>a{font-size:11px;gap:8px}.reading{padding:30px 28px}.flow{gap:5px}.flow b{font-size:10px}.course-meta{font-size:10px}}
@media(max-width:900px){.sidebar{position:static;width:auto;margin:12px;min-height:unset;padding:13px 16px;border-radius:20px;display:block}.brand{padding:0 4px 13px;font-size:20px}.brand small{display:inline;margin-left:15px;letter-spacing:.04em}.brand span{display:flex;align-items:center}.brand img{height:28px;width:20px}.sidebar nav{display:flex;gap:5px;padding-top:10px}.nav-item{justify-content:center;min-height:41px;font-size:13px;padding:9px}.sidebar-bottom{display:none}#main{margin:0;padding:18px 24px 65px}.topbar{margin-bottom:27px}.reading-layout{grid-template-columns:1fr}.lesson-toc{position:static;display:flex;gap:5px;flex-wrap:wrap;padding:0;margin-bottom:0}.lesson-toc>p,.lesson-toc>a small,.toc-end{display:none}.lesson-toc>a{padding:10px;font-size:11px;background:#e8eae3;border-radius:8px;border:0;margin:0}.lesson-toc>a.current{border:0;background:#dce5d3;border-radius:8px}.lesson-toc>a>span{display:none}.reading{padding:35px 44px}.course-intro{gap:25px}.prereq{flex-wrap:wrap}.prereq .text-link{margin-left:34px}}
@media(max-width:600px){#main{padding:12px 16px 48px}.sidebar{margin:8px;padding:12px}.brand small{font-size:10px}.nav-item{font-size:12px;gap:7px}.nav-item svg{width:17px}.topbar{font-size:11px;margin-bottom:24px}.top-note{display:none}.page-heading{display:block;margin-bottom:25px}.page-heading h1{font-size:30px}.page-heading p:not(.eyebrow){font-size:13px}.edition{display:none}.course-grid{grid-template-columns:1fr;gap:22px}.course-cover{padding-top:23px}.course-cover svg{height:185px}.course-copy{padding:21px}.course-copy h2{font-size:23px}.course-copy>p{min-height:0;font-size:13px}.course-meta{font-size:10px}.how-grid{grid-template-columns:1fr;gap:19px}.how-grid>div,.how-grid>div:first-child{padding:0 0 15px;border:0;border-bottom:1px solid var(--line)}.how-grid p{max-width:none;margin-bottom:0}.how-grid h3{display:inline-block;margin:0 0 7px 15px}.how-grid span{display:inline-block}.how{margin-top:33px}.resume{align-items:flex-start;font-size:12px;padding:13px}.resume strong{display:block;margin:4px 0 0}.resume .text-link{white-space:nowrap}.course-intro{grid-template-columns:1fr;gap:20px}.intro-visual{display:none}.course-intro h1{font-size:30px}.course-intro p{font-size:14px}.outcome{grid-template-columns:1fr;gap:8px}.outcome small{grid-column:auto}.outcome p{font-size:14px}.prereq{padding:16px;font-size:12px;gap:10px}.prereq>div{flex:1;min-width:170px}.prereq .text-link{margin-left:28px}.syllabus-row{gap:11px;padding:20px 0}.syllabus-row h3{font-size:14px}.syllabus-row p{font-size:11px}.syllabus-row svg{display:none}.section-heading{gap:10px;flex-wrap:wrap}.section-heading h2{font-size:18px}.section-heading>span:last-child{font-size:10px}.status{font-size:10px;padding:3px 6px}.step-number{font-size:12px}.lesson-top .back{font-size:12px}.lesson-top>span{font-size:10px}.reading{padding:26px 20px;border-radius:16px}.reading-head h1{font-size:27px}.lead{font-size:15px}.prose{font-size:15px;line-height:2}.demo{padding:19px 15px;margin:24px 0}.demo-title h2{font-size:14px}.flow{gap:5px}.flow b{font-size:10px;text-align:center}.flow>div{gap:12px}.diagram-arrow svg{width:15px}.flow small{font-size:10px}.compare{grid-template-columns:1fr;gap:20px}.compare>div+div{border-left:0;border-top:1px solid #dce2d4;padding:19px 0 0}.network-state .compare{grid-template-columns:1fr 1fr;font-size:12px;gap:10px}.network-state strong{font-size:14px}.file-tree{padding:10px;font-size:12px}.file-tree details>div{padding-left:13px}.file-tree p{font-size:11px}.file-tree .tag{display:none}.file-tree .muted{font-size:9px}.pattern-row{gap:8px}.apple{width:48px;height:48px;font-size:8px}.demo .button-row{gap:6px}.demo .button{font-size:11px;padding:8px 11px}.example h2{font-size:17px}.example p,.expand p{font-size:14px}.expand summary{font-size:12px;gap:7px}.expand summary svg{width:17px}.takeaway p{font-size:14px}.question legend{font-size:16px}.option{font-size:13px;padding:12px 10px;gap:8px}.option-letter{display:none}.button{font-size:12px;padding:10px 15px}.reading-footer .button-row{justify-content:flex-start}.reading-footer .button{font-size:11px}.assessment-wrap{padding:25px 19px;border-radius:18px}.assessment-wrap h1{font-size:25px}.assessment-wrap>.muted{font-size:13px}.result h1{font-size:25px}.result-list>div{font-size:12px;gap:8px;padding:13px 0}.result-list .text-link{font-size:10px;white-space:nowrap}.result-list .status{font-size:9px}.review-list{padding:0 19px}.review-row h2{font-size:16px}.review-row .button-row{gap:8px}.review-row .button{font-size:11px;padding:9px 12px}.map-course{padding:20px 17px}.map-course h2{font-size:17px}.map-course .text-link{font-size:11px}.map-course li{gap:10px}.map-course li a{font-size:12px;gap:6px}.map-connector{padding:20px 15px;font-size:10px}dialog{padding:23px 22px}dialog .prose{font-size:14px}dialog>h2{font-size:23px}.help-list{font-size:14px;padding-left:20px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

.mobile-help{display:none}.reset-tools{border-top:1px solid var(--line);margin-top:24px;padding-top:14px;display:flex;gap:20px;flex-wrap:wrap}.reset-tools .text-link{font-size:11px}@media(max-width:900px){.mobile-help{display:inline-flex;font-size:11px;padding:0;min-height:22px}.top-note{display:none}.topbar{align-items:center}}
/* AI operation readiness: reuse the reading and course visual language. */
.operation-task{background:var(--panel,#fffefa);border:1px solid #dfdfd8;border-radius:16px;padding:32px;max-width:880px;margin:24px 0;line-height:1.85}.operation-task p{margin:12px 0 20px}.operation-task textarea,.operation-task input[type=text],.operation-task input[readonly]{display:block;box-sizing:border-box;width:100%;border:1px solid #b9bdb4;border-radius:9px;padding:12px 14px;font:inherit;background:#fff;color:#282d27;margin-bottom:18px}.op-field{display:block;font-weight:600;margin:16px 0 8px}.op-check{display:flex;align-items:flex-start;gap:10px;padding:16px;background:#f0f2e9;border-radius:10px;margin:20px 0}.op-check input{margin-top:7px;min-width:18px;min-height:18px;accent-color:#536b4d}.practice-image{display:block;width:280px;max-width:100%;height:auto;border-radius:10px;margin:12px 0}.image-target{background:#f6f5ef;border:2px solid #c7cec0;border-radius:12px;padding:12px;cursor:pointer;font:inherit}.image-target:focus{outline:3px solid #677b59;outline-offset:3px}.image-target .practice-image{margin:0}.image-target span{display:block;margin-top:8px}.mouse-stage{display:flex;gap:16px;align-items:center;flex-wrap:wrap}.practice-video{display:block;width:100%;max-width:640px;border-radius:12px;background:#20251f}.folder-tree{background:#f0f2e9;border-radius:12px;padding:20px;font-size:16px;line-height:1.8}.op-options{border:0;padding:0}.op-options legend{font-weight:600}.op-options label{display:flex;align-items:flex-start;gap:12px;border:1px solid #d9dcd2;border-radius:10px;padding:16px;margin:10px 0}.op-options input{margin-top:7px}.operation-row{grid-template-columns:1fr auto auto auto;gap:20px}.optional{font-size:12px;color:#67745e;font-weight:400;margin-left:8px}.visit-page{max-width:760px;padding:64px 24px;margin:auto}.op-group-label{padding:20px 0 4px;font-size:15px;color:#5e6b55}.operation-task [hidden]{display:none!important}.operation-task .button-row{margin-top:20px}.operation-task .notice-inline{min-height:28px;margin-top:24px}#op-file{max-width:100%;font:inherit;padding:12px 0}#op-url{font-size:15px;overflow-wrap:anywhere}#op-response{margin-top:24px}.ops-review{margin-bottom:24px} .ops-review .syllabus-row{padding:16px 0}
@media(max-width:700px){.operation-task{padding:20px}.operation-row{grid-template-columns:1fr auto;gap:12px}.operation-row>div{grid-column:1 / -1}.operation-task .button-row{align-items:stretch}.visit-page{padding:32px 20px}}

/* Concise interface copy: preserve layout, reveal rules on demand. */
.course-rules{margin:16px 0 24px;font-size:14px;color:#596254;line-height:1.7}.course-rules summary{cursor:pointer;width:fit-content}.course-rules p{margin:10px 0;max-width:760px}.outcome .course-rules{margin:0}.subtitle:empty,#op-progress:empty{display:none}.operation-task .button-row{margin-top:20px}