@font-face{font-family:'Barlow Condensed';font-style:normal;font-weight:600;font-display:swap;src:url('barlow-condensed-600.ttf') format('truetype')}
/* Editorial motion: original local raster art, never behind lesson copy. */
.hero{position:relative;isolation:isolate}
.hero-backdrop{position:absolute;inset:-48px -30px 0;z-index:-1;overflow:hidden;pointer-events:none;opacity:.66;mask-image:linear-gradient(to bottom,transparent 0%,#000 15%,#000 62%,transparent 100%)}
.hero-backdrop:before{content:'';position:absolute;inset:0;background:url('editorial-shadow-hero.webp') center 36%/cover no-repeat;transform:scale(1);transform-origin:80% 30%}
.hero.intro-playing .hero-backdrop:before{animation:hero-light-arrive 3s cubic-bezier(.16,1,.3,1) both}
.hero-copy{container-type:inline-size;min-width:0}
.hero .hero-headline{max-width:none;font-size:min(100px,14.2cqw)}
.hero-title-visual,.hero-title-line{display:block}
.hero-title-line{white-space:nowrap}
.typed-letter{position:relative}
.hero-headline[data-typing='running'] .typed-letter{visibility:hidden}
.hero-headline[data-typing='running'] .typed-letter.is-typed{visibility:visible}
.hero-headline[data-typing='running'] .typed-letter.is-cursor:after{content:'';position:absolute;left:100%;top:.17em;width:2px;height:.72em;background:var(--accent);pointer-events:none}
.footer{position:relative;isolation:isolate}
.footer:before{content:'';position:absolute;inset:0;z-index:-1;background:url('editorial-paper-footer.webp') right center/cover no-repeat;opacity:.38;pointer-events:none;mask-image:linear-gradient(90deg,transparent,#000 70%,transparent)}
@keyframes hero-light-arrive{from{transform:scale(1.035);opacity:.25}to{transform:scale(1);opacity:1}}
@media(max-width:760px){.hero-backdrop{inset:-30px -22px 0;opacity:.50}.hero-backdrop:before{background-position:64% top}.footer:before{opacity:.28}}
@media(prefers-reduced-motion:reduce){.hero-headline[data-typing='running'] .typed-letter{visibility:visible!important}.typed-letter:after{display:none!important}.hero-backdrop:before{animation:none!important;transform:none!important}}
@media print{.hero-backdrop,.footer:before,.typed-letter:after{display:none!important}.hero-headline[data-typing='running'] .typed-letter{visibility:visible!important}}
/* Case decision exercises reuse the course visual system. */
.case-demo>header{flex-wrap:wrap}.case-demo .permission-options{flex-direction:column}.case-demo .permission-options button{width:100%;text-align:left}.case-demo select{min-width:0;max-width:100%}.case-demo .form-field{margin-bottom:24px}
:root{--bg:#0e0e0e;--surface:#171717;--raised:#202020;--line:#30302d;--ink:#f4f1e9;--muted:#acaaa2;--dim:#85867e;--accent:#ffbf38;--green:#b3d2b8;--red:#ffac9b;--font:Arial,Helvetica,sans-serif;--display:'Barlow Condensed',Impact,'Arial Narrow',sans-serif;--mono:'Cascadia Code','SFMono-Regular',Consolas,monospace;--side:252px}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);font-size:15px;line-height:1.65}button,input,select,textarea{font:inherit}button,a,input,select,summary{touch-action:manipulation}button{cursor:pointer}a{color:inherit;text-decoration:none}a:hover{color:var(--accent)}button{color:inherit}button:disabled{cursor:not-allowed;opacity:.46}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:4px}button:focus:not(:focus-visible),a:focus:not(:focus-visible),main:focus{outline:none}::selection{background:var(--accent);color:#111}[hidden]{display:none!important}h1,h2,h3,h4,p{margin:0}h1,h2,h3,h4{line-height:1.13}h1{font-family:var(--display);font-weight:400;letter-spacing:.015em;font-size:clamp(54px,5.7vw,90px);text-transform:uppercase}h2{font-size:27px;letter-spacing:-.03em}h3{font-size:19px;letter-spacing:-.02em}p{color:var(--muted)}p+p{margin-top:14px}strong{font-weight:600}.muted{color:var(--muted)}.accent{color:var(--accent)}.mono,.eyebrow,.edition,.breadcrumb,.progress-label,.count,.tag,.small-label{font-family:var(--mono)}.eyebrow,.small-label{font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--accent)}.eyebrow{display:flex;align-items:center;gap:12px;margin-bottom:24px}.eyebrow:before{content:'';display:block;width:25px;height:1px;background:var(--accent)}.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{position:fixed;top:10px;left:280px;transform:translateY(-150%);background:var(--accent);color:#111;padding:12px 18px;z-index:200}.skip:focus{transform:none}.sidebar{width:var(--side);position:fixed;inset:0 auto 0 0;padding:34px 25px 24px;border-right:1px solid var(--line);display:flex;flex-direction:column;background:#111110;z-index:30;overflow:auto}.brand{display:flex;align-items:center;gap:13px}.brand-symbol{font-family:var(--display);font-size:52px;line-height:1}.brand-symbol>span{color:var(--accent)}.brand-text{font-size:15px;letter-spacing:.19em;line-height:1.4;font-weight:700}.brand-text small{display:block;font-family:var(--mono);font-size:9px;letter-spacing:.2em;font-weight:400;color:var(--muted);margin-top:4px}.edition{font-size:9px;letter-spacing:.08em;color:var(--dim);display:flex;justify-content:space-between;margin:28px 0 24px;padding-top:19px;border-top:1px solid var(--line)}nav{display:grid;gap:5px}nav a{padding:12px 10px;min-height:46px;display:flex;align-items:center;gap:12px;font-size:13px;border-radius:3px;color:var(--muted);border:1px solid transparent}nav a:hover{background:var(--surface);color:var(--ink)}nav a[aria-current=page]{background:#242118;border-color:#453c26;color:var(--accent)}.nav-glyph{width:20px;font-size:19px;line-height:1;text-align:center;font-family:var(--mono)}.count{font-size:10px;margin-left:auto;border:1px solid var(--line);padding:1px 5px;color:var(--muted)}.sidebar-progress{padding:27px 2px 0;margin-top:25px;border-top:1px solid var(--line)}.progress-label{display:flex;justify-content:space-between;align-items:center;font-size:9px;letter-spacing:.08em;color:var(--dim)}.progress-label strong{color:var(--ink);font-size:10px;letter-spacing:0}progress{display:block;width:100%;height:3px;appearance:none;border:none;background:#30302d;margin:12px 0 16px}progress::-webkit-progress-bar{background:#30302d}progress::-webkit-progress-value{background:var(--accent);transition:width .3s}progress::-moz-progress-bar{background:var(--accent)}.sidebar-progress p{font-size:12px;line-height:1.7;margin-bottom:12px}.text-button{border:0;padding:0;background:none;text-align:left;font-size:11px;line-height:1.6;min-height:36px;color:var(--accent)}.sidebar-bottom{padding:28px 0 0;margin-top:auto;font-size:10px;color:var(--muted);line-height:1.8}.sidebar-bottom small{color:var(--dim);margin-left:13px;font-size:10px}.sidebar-bottom a{display:block;margin:10px 0 0 13px;font-size:10px}.status-dot{display:inline-block;width:5px;height:5px;border-radius:50%;background:var(--green);margin-right:7px;vertical-align:middle}.workspace{margin-left:var(--side)}.topbar{display:flex;justify-content:space-between;align-items:center;min-height:80px;padding:15px 46px;border-bottom:1px solid var(--line);gap:24px}.breadcrumb{font-size:9px;letter-spacing:.13em;color:var(--dim)}.breadcrumb span{color:var(--ink)}.search-trigger{display:flex;align-items:center;gap:12px;background:transparent;border:1px solid var(--line);color:var(--muted);padding:8px 12px;min-height:38px;border-radius:3px;font-size:11px}.search-trigger>span{font-size:20px;line-height:1}kbd{font-family:var(--mono);font-size:10px;background:#262625;border:1px solid #3a3a36;border-radius:3px;padding:0 6px;color:var(--muted)}.search-trigger kbd{margin-left:26px}main{max-width:1380px;padding:48px 46px 70px;margin:0 auto;min-height:75vh}.hero{display:grid;grid-template-columns:1.26fr 1fr;gap:36px;align-items:center;padding:13px 0 48px}.hero h1{max-width:650px;line-height:1.01}.hero h1 .accent{display:block}.hero .lead{font-size:15px;line-height:1.8;margin:23px 0 26px;max-width:440px}.hero-foot{font-family:var(--mono);font-size:9px;letter-spacing:.03em;color:var(--dim);margin-top:18px}.button{display:inline-flex;align-items:center;justify-content:center;gap:24px;min-height:46px;padding:12px 20px;background:var(--accent);border:1px solid var(--accent);color:#14130e;border-radius:3px;font-size:12px;font-weight:600;line-height:1.4;transition:background .15s,transform .15s}.button:hover{color:#14130e;background:#ffd16d;border-color:#ffd16d;transform:translateY(-1px)}.button.secondary{background:transparent;border-color:#48483e;color:var(--ink)}.button.secondary:hover{background:#252521;border-color:#777568}.button.small{padding:9px 12px;min-height:38px;font-size:11px;gap:10px}.button.danger{background:transparent;border-color:var(--red);color:var(--red)}.button-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.hero-board{position:relative;border:1px solid #39372f;background:#181917;padding:24px 24px 20px;min-height:345px;overflow:hidden}.board-caption{display:flex;justify-content:space-between;font-size:9px;color:#c4b99b;letter-spacing:.08em;border-bottom:1px solid #35372f;padding-bottom:17px;margin-bottom:22px;font-family:var(--mono)}.board-caption>span:last-child{color:var(--dim)}.flow-node{display:grid;grid-template-columns:28px 1fr auto;gap:10px;align-items:center}.node-number{font-family:var(--mono);font-size:10px;color:var(--dim)}.flow-node strong{display:block;font-size:15px;line-height:1.3}.flow-node p{font-size:11px;margin-top:3px;color:var(--muted)}.node-label{font-size:9px;font-family:var(--mono);color:var(--dim)}.flow-link{height:34px;width:1px;background:#555645;margin:8px 0 8px 41px;position:relative}.flow-link:after{content:'';position:absolute;bottom:0;left:-2px;width:5px;height:5px;border-bottom:1px solid #555645;border-right:1px solid #555645;transform:rotate(45deg)}.flow-node.last strong{color:var(--accent)}.flow-node.last .node-label{color:var(--accent)}.board-bottom{margin-top:23px;padding-top:14px;border-top:1px solid #35372f;display:flex;justify-content:space-between;align-items:center;font-size:10px;color:var(--muted)}.board-bottom a{color:var(--accent)}.principles{display:flex;flex-wrap:wrap;gap:17px 36px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:17px 0;margin-bottom:46px}.principles span{font-size:10px;color:var(--muted)}.principles b{color:var(--accent);font-family:var(--mono);font-weight:400;margin-right:8px}.section-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:23px}.section-heading .small-label{display:block;color:var(--dim);margin-bottom:10px}.section-heading p{font-size:12px;max-width:350px}.section-heading>a{font-size:11px;color:var(--accent);white-space:nowrap}.module-list{border-top:1px solid var(--line)}.module-row{display:grid;grid-template-columns:48px 1fr 108px 20px;align-items:center;gap:20px;min-height:91px;padding:18px 8px;border-bottom:1px solid var(--line);transition:background .16s}.module-row:hover{background:var(--surface);color:var(--ink)}.module-row .row-num{font-family:var(--mono);font-size:24px;color:var(--dim);font-weight:300}.module-row.current .row-num{color:var(--accent)}.module-row.done .row-num{color:var(--green)}.row-copy h3{font-size:17px;font-weight:500;letter-spacing:-.01em}.row-copy p{font-size:12px;margin-top:5px}.row-status{font-family:var(--mono);font-size:9px;letter-spacing:.02em;text-align:right;color:var(--dim)}.current .row-status{color:var(--accent)}.done .row-status{color:var(--green)}.row-arrow{color:var(--dim)}.home-lower{display:grid;grid-template-columns:1.1fr 1fr;gap:34px;margin-top:44px}.feature-panel{padding:26px;background:var(--surface);border:1px solid var(--line)}.feature-panel .small-label{display:block;margin-bottom:15px}.feature-panel h3{font-size:23px;line-height:1.2;margin-bottom:13px}.feature-panel p{font-size:13px;margin-bottom:18px}.feature-panel a{font-size:12px;color:var(--accent)}.safety-panel{padding:25px 4px}.safety-panel h3{font-size:20px;margin:16px 0 12px}.safety-panel p{font-size:13px;margin-bottom:12px}.footer{display:flex;flex-direction:column;gap:26px;margin:0 46px;padding:32px 0 26px;border-top:1px solid var(--line);color:var(--dim);font-family:var(--mono);font-size:8px;letter-spacing:.04em}.footer-social{justify-content:space-between;align-items:center}.footer-social-copy .small-label{font-size:9px;color:var(--accent);letter-spacing:.12em}.footer-social-copy strong{display:block;margin:8px 0 6px;color:var(--ink);font-family:var(--font);font-size:25px;font-weight:500;letter-spacing:-.02em}.footer-social-copy p{font-family:var(--font);font-size:13px;color:var(--muted);margin:0;letter-spacing:0}.footer-social-links{display:flex;flex-wrap:wrap;gap:10px}.social-link{display:inline-flex;min-height:44px;align-items:center;justify-content:space-between;gap:26px;padding:10px 15px;border:1px solid var(--line);color:var(--ink);font-family:var(--font);font-size:13px;letter-spacing:0}.social-link:hover{border-color:var(--accent);color:var(--accent);background:var(--surface)}.social-link span{color:var(--accent)}.footer-meta{justify-content:space-between;border-top:1px solid var(--line);padding-top:22px}.footer-meta>div{display:flex;flex-wrap:wrap;align-items:center;gap:16px}.footer>div{display:flex;flex-wrap:wrap;gap:20px}.page-head{margin-bottom:35px}.page-head h1{font-size:clamp(48px,5vw,68px);max-width:820px}.page-head p{margin-top:18px;max-width:680px;font-size:15px}.page-head .eyebrow{margin-bottom:20px}.notice{padding:17px 19px;border:1px solid #48402c;background:#201d15;color:#d6cbb1;font-size:12px;margin:22px 0;line-height:1.8}.notice strong{color:var(--accent)}.notice.neutral{border-color:var(--line);background:var(--surface);color:var(--muted)}.page-grid{display:grid;grid-template-columns:minmax(0,1fr) 265px;gap:38px}.lesson-head{border-bottom:1px solid var(--line);padding-bottom:27px;margin-bottom:30px}.lesson-head .small-label{color:var(--dim)}.lesson-head h1{font-family:var(--font);font-weight:500;text-transform:none;font-size:38px;letter-spacing:-.04em;margin:17px 0}.lesson-head p{font-size:15px}.back-link{display:inline-block;font-size:11px;color:var(--muted);margin-bottom:25px;min-height:32px}.lesson-side{align-self:start;position:sticky;top:25px;max-height:calc(100vh - 50px);overflow:auto;scrollbar-width:thin;border:1px solid var(--line);padding:22px;background:var(--surface)}.lesson-side h3{font-size:16px;margin-bottom:16px}.lesson-side p{font-size:12px}.lesson-side ul{padding-left:17px;margin:12px 0 25px;color:var(--muted);font-size:12px}.lesson-side .small-label{display:block;margin-bottom:10px}.lesson-section{margin-bottom:31px}.lesson-section h2{font-size:21px;margin-bottom:14px;line-height:1.3}.lesson-section p{font-size:14px;line-height:1.85;white-space:pre-line}.lesson-section ul{padding-left:20px;color:var(--muted);font-size:13px;line-height:1.85;margin:14px 0}.lesson-section li+li{margin-top:7px}.code-box{margin:17px 0;border:1px solid var(--line);background:#111210;min-width:0}.code-top{display:flex;justify-content:space-between;align-items:center;padding:8px 14px;border-bottom:1px solid var(--line);gap:12px;font-size:10px;font-family:var(--mono);color:var(--dim)}.copy-button{background:none;border:1px solid #44463d;border-radius:3px;font-family:var(--font);font-size:10px;color:var(--ink);padding:7px 10px;min-height:32px}.copy-button:hover{border-color:var(--accent);color:var(--accent)}pre{font-family:var(--mono);font-size:12px;line-height:1.8;color:#d9d8ce;margin:0;padding:18px;white-space:pre-wrap;overflow-wrap:anywhere;tab-size:2}code{font-family:var(--mono);font-size:.9em}.os-tabs,.segmented{display:flex;gap:4px;flex-wrap:wrap;margin:15px 0}.os-tabs button,.segmented button{background:var(--surface);border:1px solid var(--line);border-radius:3px;min-height:40px;padding:9px 15px;color:var(--muted);font-size:12px}.os-tabs button[aria-pressed=true],.segmented button[aria-pressed=true]{background:#292317;border-color:#6c5830;color:var(--accent)}.install-panel{padding:22px;border:1px solid var(--line);margin-bottom:26px}.install-panel h3{font-size:17px;margin-bottom:10px}.install-panel p{font-size:13px;line-height:1.8}.install-panel .button-row{margin:17px 0}.install-panel .small-label{color:var(--dim)}.checklist{display:grid;gap:9px;margin:17px 0}.check-row{display:flex;align-items:flex-start;gap:10px;padding:11px 12px;border:1px solid var(--line);background:var(--surface);font-size:12px;line-height:1.65;cursor:pointer}.check-row:has(input:checked){border-color:#3c5042;color:var(--green)}input[type=checkbox],input[type=radio]{accent-color:var(--accent);width:16px;height:16px;flex:0 0 16px;margin:3px 0 0}.quiz{border:1px solid var(--line);padding:22px;margin:30px 0;background:#141413}.quiz .small-label{display:block;margin-bottom:12px}.quiz h3{font-size:17px;line-height:1.5;margin-bottom:15px}.quiz-options{display:grid;gap:8px}.quiz-choice{display:flex;align-items:flex-start;gap:10px;border:1px solid var(--line);padding:12px;font-size:12px;cursor:pointer}.quiz-choice:has(input:checked){border-color:var(--accent);background:#221e14}.feedback{font-size:12px;padding:15px 16px;margin-top:14px;border:1px solid #3e5142;background:#19201a;color:var(--green)}.feedback.wrong{border-color:#614538;background:#241b16;color:#e6b99e}.feedback[hidden]{margin:0;padding:0}.complete-panel{border-top:1px solid var(--line);padding-top:24px;margin-top:25px}.complete-panel p{font-size:12px;margin-bottom:16px}.complete-panel .button{width:100%}.source-list{display:flex;flex-wrap:wrap;gap:8px 20px;font-size:11px;color:var(--muted);margin:17px 0}.source-list a{text-decoration:underline;text-underline-offset:4px}.chapter-nav{display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--line);padding-top:25px;margin-top:35px;font-size:12px;color:var(--accent)}.case-list{display:grid;grid-template-columns:1fr 1fr;gap:22px}.case-card{padding:27px;border:1px solid var(--line);background:var(--surface);display:flex;flex-direction:column;min-height:270px}.case-card .case-index{display:flex;justify-content:space-between;align-items:center;margin-bottom:30px}.case-card .case-index>span:first-child{font-family:var(--mono);font-size:11px;color:var(--dim)}.tag{font-size:9px;color:var(--muted);padding:3px 7px;border:1px solid #45453e;white-space:nowrap}.tag.synthetic{border-color:#595039;color:#cfb77f}.case-card h2{font-size:26px;line-height:1.2;margin-bottom:14px}.case-card p{font-size:13px;line-height:1.8;margin-bottom:24px}.case-card .button{align-self:flex-start;margin-top:auto}.case-lead{font-size:18px!important}.case-steps{counter-reset:case}.case-step{display:grid;grid-template-columns:40px 1fr;gap:20px;padding:23px 0;border-bottom:1px solid var(--line)}.case-step:before{counter-increment:case;content:'0' counter(case);font-family:var(--mono);font-size:20px;color:var(--accent)}.case-step h3{font-size:18px;margin-bottom:10px}.case-step p{font-size:13px;white-space:pre-line}.case-output{padding:25px;background:#e5e0d3;color:#191b17;margin:30px 0}.case-output .small-label{color:#645633}.case-output h2{font-size:23px;margin:13px 0}.case-output p{color:#393b33;font-size:13px;white-space:pre-line}.lab-block{border:1px solid var(--line);margin-bottom:28px}.lab-block>header{display:flex;justify-content:space-between;align-items:start;gap:20px;padding:24px;border-bottom:1px solid var(--line);background:var(--surface)}.lab-block>header h2{font-size:23px;margin-top:10px}.lab-block>header .small-label{color:var(--dim)}.lab-body{padding:26px}.lab-body>p{font-size:13px;margin-bottom:20px}.lab-controls{display:flex;align-items:center;gap:24px;flex-wrap:wrap;margin-bottom:20px}.lab-controls 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