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h3{font-size:12px;margin-bottom:12px}.sim-nodes{display:flex;gap:15px}.sim-node-bar{height:6px;background:#e0e8da;border-radius:6px;overflow:hidden;margin-top:15px}.sim-node-bar>div{height:100%;background:#52846c;transition:width .3s}.sim-node small{font-size:9px;color:#71876a}.sim-legend{display:flex;align-items:center;gap:20px;font-size:10px;color:#7d8c74;flex-wrap:wrap}.sim-legend>span{display:flex;gap:7px;align-items:center}.comparison-bars{display:flex;flex-direction:column;gap:17px;margin:25px 0}.comparison-row{display:grid;grid-template-columns:90px 1fr 60px;gap:15px;align-items:center;font-size:11px}.comparison-bar{height:10px;background:#edf1e8;border-radius:3px;overflow:hidden}.comparison-bar>div{height:100%;background:#5d8a76;border-radius:3px}.comparison-value{font:11px ui-monospace,monospace;text-align:right}.cheat-sheet{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:6px;overflow:hidden;margin:25px 0}.cheat-item{padding:20px;background:white}.cheat-item strong{display:block;font-size:12px;margin-bottom:7px}.cheat-item span{font-size:11px;line-height:1.75;color:var(--muted)}.notice-inline{display:flex;align-items:flex-start;gap:10px;padding:12px 0;color:var(--muted);font-size:11px;line-height:1.7}.toast{position:fixed;bottom:22px;left:calc(50% + 120px);transform:translateX(-50%);background:var(--nav);color:#e5f4e5;padding:11px 19px;border-radius:5px;font-size:12px;box-shadow:0 8px 30px #10232d26;z-index:100;max-width:85vw}.toast[hidden]{display:none}.spaced-top{margin-top:28px}.checkbox-label{display:flex;align-items:flex-start;gap:9px;font-size:12px;line-height:1.6;margin:17px 0;color:#566e76}.checkbox-label input{accent-color:var(--teal);margin-top:4px}.search-result-count{font-size:11px;color:var(--muted);margin-left:auto}.readiness-list{list-style:none;padding:0;margin:15px 0}.readiness-list li{padding:10px 0;display:flex;gap:10px;font-size:12px;color:#5f747a;border-bottom:1px solid #e5ebe2}.readiness-list li:before{content:"→";color:#7d9b6d}.chart-note{font-size:10px;color:var(--muted);line-height:1.75}.skeleton-text{height:12px;background:#e9eee6;border-radius:3px;margin-bottom:15px;width:70%}.word-break{overflow-wrap:anywhere}.inline-code{background:#e9eee8;border-radius:3px;padding:1px 5px;font:11px ui-monospace,monospace}.recipe-section{margin:30px 0}.recipe-section h2{font-size:20px}.recipe-section li{font-size:12px;line-height:1.8;margin:7px 0}.route-anchor{scroll-margin-top:25px}.completion-box{background:#e7f1df;border:1px solid #c9dbba;border-radius:7px;padding:20px;margin-top:28px;display:flex;justify-content:space-between;align-items:center;gap:20px}.completion-box h3{font-size:14px;margin:0 0 5px}.completion-box p{font-size:11px;color:#64765b;margin:0}.horizontal-rule{border:0;border-top:1px solid var(--line);margin:30px 0}@keyframes spin{to{transform:rotate(360deg)}}
@media(min-width:1600px){main{padding-top:50px}.hero h1{font-size:50px}.hero-illustration{max-width:460px}}
@media(max-width:1200px){.sidebar{width:210px;padding-left:13px;padding-right:13px}.workspace{margin-left:210px;width:calc(100% - 210px)}main{padding:35px 32px 50px}.topbar{padding:0 32px}.hero{gap:25px}.hero h1{font-size:38px}.path-layout{grid-template-columns:minmax(0,1fr) 225px;gap:20px}.content-grid{grid-template-columns:minmax(0,1fr) 225px;gap:22px}.toast{left:calc(50% + 105px)}.breadcrumb>span:first-child{display:none}.breadcrumb>span+span{border:0;padding:0}.app-footer{padding:20px 32px}.lesson-row-meta .badge{display:none}.panel{padding:21px}}
@media(max-width:960px){.sidebar{width:195px}.workspace{margin-left:195px;width:calc(100% - 195px)}.brand{font-size:21px}.edition{font-size:7px}.nav-list a{font-size:11px;gap:8px}.hero{grid-template-columns:1fr}.hero-illustration{display:none}.hero h1{max-width:600px;font-size:39px}.hero p{max-width:600px}.path-layout{grid-template-columns:1fr}.path-aside{display:grid;grid-template-columns:1fr 1fr;gap:18px}.side-note{margin-bottom:0}.content-grid{grid-template-columns:1fr}.lesson-aside{padding-top:0;order:-1}.lesson-aside .quiet-card{position:static}.lesson-aside .contents-list,.lesson-aside .objectives-heading,.lesson-aside .objective-list,.lesson-aside .divider{display:none}.lesson-aside .quiet-card{padding:15px;display:flex;align-items:center;gap:15px}.lesson-aside .quiet-card>.button{margin-left:auto}.lesson-aside .quiet-card h3{margin:0}.lesson-aside .quiet-card p{margin:0}.two-column{grid-template-columns:1fr}.three-column{grid-template-columns:1fr 1fr}.node-grid{grid-template-columns:1fr 1fr}.overview-row{gap:14px}.overview-stat{padding-left:14px}.overview-stat strong{font-size:22px}.overview-stat span{font-size:9px}.recipe-grid{grid-template-columns:1fr}.toast{left:calc(50% + 97px)}.page-heading h1{font-size:30px}.app-footer>span:last-child{display:none}}
@media(max-width:720px){.sidebar{transform:translateX(-100%);transition:transform .2s;width:245px;padding:27px 20px}.sidebar.open{transform:translateX(0);box-shadow:0 0 0 100vmax #10232d66}.workspace{margin:0;width:100%}.topbar{height:66px;padding:0 21px;justify-content:flex-start;gap:15px;position:relative;z-index:22;background:#f7f9f5}.connection-status{margin-left:auto;font-size:10px}.menu-toggle{display:block;padding:0}.breadcrumb>span+span{font-size:11px}.brand{font-size:23px}.nav-list a{font-size:13px;padding:11px 12px}.edition{font-size:8px}.sidebar.open{padding-top:88px}.sidebar.open .brand,.sidebar.open .edition{display:none}.sidebar.open .sidebar-bottom{padding-top:15px}.nav-caption{margin-top:20px}main{padding:30px 21px 45px}.hero{padding-bottom:28px;margin-bottom:24px;gap:0}.hero h1{font-size:36px;letter-spacing:-1px}.hero p{font-size:13px;line-height:1.8;margin:16px 0 20px}.eyebrow{font-size:9px}.hero-actions{gap:13px}.hero-actions .text-link{font-size:11px}.overview-row{grid-template-columns:1fr 1fr;gap:20px 10px;margin-bottom:28px}.overview-stat:nth-child(3){padding-left:0;border:0}.overview-stat strong{font-size:24px}.overview-stat span{font-size:10px}.section-heading{align-items:flex-start}.section-heading h2{font-size:20px}.section-heading p{font-size:10px}.path-aside{grid-template-columns:1fr}.track-heading{padding:18px 16px}.track-heading h3{font-size:14px}.track-heading p{font-size:11px}.track-heading .badge{display:none}.lesson-row{padding:12px 16px;gap:10px}.lesson-row-title{font-size:11px}.lesson-row-meta{font-size:9px}.page-heading{flex-direction:column;gap:10px}.page-heading h1{font-size:31px}.page-heading p{font-size:13px}.page-heading .button{align-self:flex-start}.node-grid{grid-template-columns:1fr}.panel{padding:20px 17px}.three-column{grid-template-columns:1fr}.lesson-header h1{font-size:29px}.lesson-header>p{font-size:14px}.reading-section p,.reading-section li{font-size:13px}.experiment{padding:20px 16px}.step{padding-left:29px}.lesson-aside .quiet-card p{display:none}.completion-box{align-items:flex-start;flex-direction:column;gap:13px}.lesson-navigation{flex-wrap:wrap}.metric-grid{gap:10px}.metric strong{font-size:21px}.metric span{font-size:9px}.table-wrap{margin:0 -8px}.data-table td,.data-table th{padding:11px 8px}.input-row{gap:11px}.form-actions{gap:8px}.button{padding:9px 13px}.toast{left:50%;width:max-content}.app-footer{padding:20px 21px;font-size:9px}.app-footer>span:nth-child(2){max-width:180px;text-align:right}.cheat-sheet{grid-template-columns:1fr}.sim-stage{padding:17px 13px}.sim-nodes{gap:9px}.sim-node{padding:12px 10px}.sim-node h3{font-size:11px}.topology{padding:25px 10px}.topology-branches{width:100%}.topology-worker{padding:13px;font-size:10px}.topology-gateway{font-size:11px}.definition-list>div{font-size:10px}.skip-link{left:20px}.toolbar .input{width:100%;flex:1}.toolbar .search-input{min-width:100%}.notebook-header{flex-direction:column;gap:2px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

/* A quieter, guided learning experience. */
.advanced-nav{margin-top:27px;border-top:1px solid #29404a;padding-top:17px}.advanced-nav>summary{cursor:pointer;color:#8ea7af;font-size:11px;padding:8px 12px;list-style:none;display:flex;justify-content:space-between;align-items:center}.advanced-nav>summary:after{content:'+';font-size:16px;color:#78949d}.advanced-nav[open]>summary:after{content:'−'}.advanced-nav>summary::-webkit-details-marker{display:none}.advanced-nav a{margin-top:5px;font-size:12px}.private-label{flex-wrap:wrap;align-items:center}.sync-reload.button{font-size:9px;background:transparent;border:0;color:var(--lime);padding:0;text-decoration:underline;line-height:1.4}.signout-button.button{font-size:10px;padding:4px 8px;color:var(--muted);background:transparent;border:0;font-weight:400}.signout-button:hover{color:var(--teal);background:#e9f0e7}.simple-home{max-width:1000px;margin:0 auto}.simple-intro{padding:15px 0 20px;max-width:700px}.simple-intro h1{font-size:43px;line-height:1.14;font-weight:600;letter-spacing:-1.3px;margin:0 0 19px}.simple-intro>p{font-size:15px;line-height:1.8;max-width:590px;color:var(--muted);margin:0}.simple-intro .eyebrow{font-size:9px;margin-bottom:21px}.continue-card{padding:29px 30px;background:#e8f0df;border:1px solid #d1dec4;border-radius:10px;margin:16px 0 39px;display:flex;justify-content:space-between;align-items:center;gap:30px}.continue-card>div{max-width:620px}.continue-kicker{font-size:9px;letter-spacing:1.4px;color:#607d50;display:block;margin-bottom:13px}.continue-card h2{font-size:24px;line-height:1.35;letter-spacing:-.65px;margin-bottom:9px}.continue-card p{font-size:12px;line-height:1.8;color:#617359;margin-bottom:14px}.continue-meta{font-size:10px;color:#7b8d70}.continue-button{font-size:13px;padding:12px 23px;background:#245c47;border-color:#245c47;flex-shrink:0}.choose-topic>h2{font-size:17px;font-weight:550;margin-bottom:18px;letter-spacing:-.2px}.topic-choices{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.topic-choice{padding:23px 21px;background:#fff;border:1px solid var(--line);border-radius:7px;color:var(--ink);position:relative;display:block}.topic-choice:hover{text-decoration:none;border-color:#93b09b;background:#fafcf7}.topic-symbol{display:block;font-size:23px;color:#5f8772;margin-bottom:17px;line-height:1}.topic-choice h3{font-size:14px;margin:0 0 8px;font-weight:550;letter-spacing:-.1px}.topic-choice p{font-size:11px;line-height:1.8;color:var(--muted);margin:0 0 16px;max-width:220px}.topic-arrow{display:block;color:#7c9485;font-size:17px}.course-outline{margin-top:28px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.course-outline>summary{display:flex;justify-content:space-between;gap:20px;align-items:center;padding:19px 0;font-size:12px;cursor:pointer;color:#566f60;list-style:none}.course-outline>summary>span:first-child:before{content:'+';font-size:17px;width:22px;display:inline-block;color:#879e8a}.course-outline[open]>summary>span:first-child:before{content:'−'}.course-outline>summary::-webkit-details-marker{display:none}.outline-content{padding:0 0 20px}.outline-content>.input{max-width:450px;margin:4px 0 17px}.compact-track{border-top:1px solid #e0e7df}.compact-track>summary{display:flex;justify-content:space-between;padding:16px 5px;font-size:12px;cursor:pointer;list-style:none;color:#4c6555}.compact-track>summary::-webkit-details-marker{display:none}.compact-track>summary>span:first-child:before{content:'›';display:inline-block;width:18px;color:#8aa08a}.compact-track[open]>summary>span:first-child:before{content:'⌄'}.compact-track .lesson-row{padding:12px 22px;background:#fff}.compact-track .lesson-row-title{font-size:12px}.home-footnote{text-align:center;font-size:10px;color:#83928b;margin:20px 0 0}.guided-lesson{max-width:810px;margin:0 auto}.guided-lesson>.back-link{font-size:11px;margin-bottom:23px}.guided-header{margin-bottom:28px}.guided-header h1{font-size:31px;line-height:1.25;letter-spacing:-.9px;margin:0 0 13px;max-width:750px}.guided-header>p{font-size:13px;color:var(--muted);line-height:1.8;max-width:730px;margin:0}.lesson-stages{display:grid;grid-template-columns:1fr 1fr 1fr;border-bottom:1px solid var(--line);gap:15px;margin-bottom:25px}.lesson-stage{display:flex;align-items:center;justify-content:center;gap:9px;background:transparent;color:#8a9a90;font-size:11px;padding:13px 4px;border-bottom:2px solid transparent;margin-bottom:-1px}.lesson-stage>span{font-size:9px;display:inline-flex;align-items:center;justify-content:center;width:20px;height:20px;border:1px solid #d3ded1;border-radius:50%}.lesson-stage.current{color:var(--teal);border-bottom-color:var(--teal);font-weight:550}.lesson-stage.current>span{border-color:#b3caae;background:#e5efdf}.guided-content{padding:29px 32px;background:white;border:1px solid var(--line);border-radius:8px;min-height:260px}.guided-section-count{font-size:10px;color:#94a08f;margin-bottom:17px}.guided-content>h2{font-size:22px;line-height:1.4;letter-spacing:-.45px;margin-bottom:18px}.guided-content .body-paragraph{font-size:15px;line-height:1.95;color:#47606a;margin-bottom:13px}.guided-content .body-paragraph:last-child{margin-bottom:0}.guided-content>.guided-question{color:#64816d;font-size:12px;line-height:1.8;margin-bottom:20px}.guided-instruction{font-size:15px;line-height:1.9;color:#46616b;margin-top:17px}.guided-navigation{display:flex;justify-content:space-between;align-items:center;gap:17px;margin:20px 0 28px}.guided-navigation .button{font-size:12px;padding:11px 18px}.guided-navigation .ghost{padding-left:0;font-weight:400}.guided-content .quiz-card{padding:0;border:0;margin:19px 0 25px}.guided-content .quiz-card h3{font-size:14px}.guided-content .quiz-option{padding:13px 14px;font-size:12px}.guided-content .quiz-feedback{font-size:12px}.guided-content .field-label{margin-top:23px}.gentle-disclosure{border-top:1px solid var(--line);margin-top:20px;padding-top:1px}.gentle-disclosure>summary{font-size:11px;cursor:pointer;color:#74877c;padding:15px 0;list-style:none;display:flex;align-items:center;gap:10px;justify-content:flex-start}.gentle-disclosure>summary:before{content:'+';font-size:16px;line-height:1;color:#8fa493}.gentle-disclosure[open]>summary:before{content:'−'}.gentle-disclosure>summary::-webkit-details-marker{display:none}.gentle-disclosure>p,.gentle-disclosure>ul,.gentle-disclosure>div>p{font-size:12px;line-height:1.8;color:#61777b}.gentle-disclosure ul,.gentle-disclosure ol{padding-left:20px;line-height:1.9}.gentle-disclosure h3{font-size:14px}.full-lesson-detail{margin-top:0}.full-lesson-body{padding:15px 0}.full-lesson-body .reading-section{margin:27px 0}.full-lesson-body .body-paragraph{font-size:13px}.full-lesson-body>div>ul{font-size:12px;color:#6f817c}.experiment-launch{margin:25px 0 10px}.experiment-launch .button{font-size:11px}.experiment-launch p{margin-top:10px;max-width:400px}.prediction-disclosure{margin-top:16px;margin-bottom:20px}.prediction-disclosure .field-label{margin-top:6px}.quiz-pager{display:flex;align-items:center;justify-content:space-between;gap:10px}.lesson-complete-message{margin:20px 0 0;font-size:12px;color:var(--teal)}.simple-try{max-width:810px;margin:0 auto}.simple-try .page-heading{margin-bottom:15px}.simple-try .page-heading h1{font-size:33px}.simple-try .page-heading p{font-size:13px}.try-request{background:#fff;border:1px solid var(--line);border-radius:8px;padding:22px 27px}.try-request>.field-label{margin-top:0}.try-request .input{font-size:13px}.try-options{margin-top:13px}.try-options>summary{padding:12px 0}.try-options .field-label{margin-top:8px}.try-options .input{font-size:11px}.try-options .checkbox-label{margin-top:16px}.try-actions{display:flex;align-items:center;gap:14px;margin-top:9px}.try-actions>.button:first-child{padding:10px 24px}.try-actions>.control-note{margin:0 0 0 auto;color:#90a092;font-size:10px}.try-answer{margin-top:28px}.try-answer .response-heading{margin-bottom:13px}.try-answer .response-heading h2{font-size:16px;font-weight:550}.try-answer .response-empty{min-height:170px;background:transparent;border-style:dashed}.try-answer .response-empty>p{font-size:12px;margin:0}.try-answer .response-icon{font-size:24px;margin-bottom:10px}.try-answer .response-box:not(.response-empty){background:white;border-color:#d9e2d5;font-size:14px;line-height:1.95}.response-details .metric strong{font-size:22px}.response-details .metric-grid{margin-top:0}.sidebar-bottom>p{margin-bottom:20px}.simple-home .continue-card .button{box-shadow:none}
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