@charset "UTF-8";
:root{--ink:#142c2a;--muted:#5b6e69;--green:#17694a;--lime:#d3ee8c;--line:#dce5df;--paper:#f5f7f2;--white:#fff;--navy:#102923;--orange:#a95713;--red:#b52e34;--radius:18px;--mono:ui-monospace,SFMono-Regular,Consolas,monospace;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}
*{box-sizing:border-box}body{margin:0}a{color:var(--green);text-underline-offset:4px}a:hover{text-decoration-thickness:2px}button,input,select,textarea{font:inherit}button,a.button{cursor:pointer}button:disabled{opacity:.45;cursor:not-allowed}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #59a7cb;outline-offset:3px}button{border:1px solid var(--line);background:white;color:var(--ink);border-radius:8px;padding:10px 14px;font-weight:650}button:hover{background:#edf3e9}button.primary,a.primary{background:var(--green);border-color:var(--green);color:#fff}button.danger{background:var(--red);color:white;border-color:var(--red)}button.warning{background:#fff1d4;border-color:#e9cd8e;color:#714b0d}button.active{background:var(--navy);color:var(--lime)}.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;text-decoration:none;padding:13px 20px;border-radius:9px;border:1px solid var(--line);background:#fff;color:var(--ink);font-weight:700}.button.light{background:var(--lime);color:var(--navy);border-color:var(--lime)}.button.ghost{background:transparent;color:#fff;border-color:#638173}
.topbar{background:#fff;border-bottom:1px solid var(--line);padding:15px max(24px,calc((100vw - 1440px)/2));display:flex;align-items:center;gap:26px;position:relative;z-index:5}.identity{display:flex;gap:12px;align-items:center;text-decoration:none;color:var(--ink);flex-shrink:0}.logo-box{width:58px;height:58px;border:1px solid #b8c9b8;border-radius:0;background:#fff;padding:4px;display:grid;place-items:center}.logo-box img{max-width:100%;max-height:100%;object-fit:contain}.wordmark{font-size:19px;font-weight:800;letter-spacing:-.5px}.wordmark small{display:block;font-size:10px;letter-spacing:1.7px;text-transform:uppercase;color:var(--muted);margin-top:3px}.topbar nav{display:flex;gap:5px;flex-wrap:wrap;margin-left:auto}.topbar nav a{font-size:13px;font-weight:650;text-decoration:none;color:var(--muted);padding:10px 12px;border-radius:7px}.topbar nav a[aria-current=page]{background:#eaf1e7;color:var(--green)}.edition{font:10px var(--mono);padding-left:16px;border-left:1px solid var(--line);line-height:1.8;white-space:nowrap;color:var(--muted)}.skip{position:absolute;left:-999px}.skip:focus{left:20px;top:5px;z-index:20;background:#fff;padding:10px}
main{max-width:1440px;margin:auto;padding:42px 30px 60px}.eyebrow{font:600 11px var(--mono);letter-spacing:1.8px;text-transform:uppercase;color:var(--green);margin:0 0 14px}.page-title{font-size:clamp(32px,4.5vw,54px);letter-spacing:-2px;line-height:1.07;margin:0 0 18px;max-width:850px}h1,h2,h3,h4{font-weight:720}h2{font-size:27px;letter-spacing:-.7px}h3{font-size:19px;letter-spacing:-.3px}p{line-height:1.65}.lede{font-size:17px;color:var(--muted);max-width:820px;margin:0 0 24px}.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.between{justify-content:space-between}.pill{display:inline-block;font:11px var(--mono);padding:6px 9px;border-radius:6px;background:#e9f2e7;color:#296343;white-space:nowrap}.pill.amber{background:#fff1d9;color:#7a4b11}.pill.gray{background:#eef0ef;color:#51645d}.pill.red{background:#ffe3e4;color:#a62932}.muted{color:var(--muted)}.tiny{font-size:12px}.mono,code,pre{font-family:var(--mono)}code{font-size:.91em;background:#e9eee7;padding:2px 5px;border-radius:4px}pre{white-space:pre-wrap;word-break:break-word;background:#102923;color:#d5efdf;padding:20px;border-radius:10px;font-size:12px;line-height:1.7;overflow:auto}pre code{background:transparent;color:inherit;padding:0}.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px}.grid{display:grid;gap:20px}.cols2{grid-template-columns:repeat(2,minmax(0,1fr))}.cols3{grid-template-columns:repeat(3,minmax(0,1fr))}.cols4{grid-template-columns:repeat(4,minmax(0,1fr))}.section{margin-top:38px}.card h3{margin-top:5px}.card p:last-child{margin-bottom:0}.notice{padding:16px 20px;border-left:3px solid #bb8b26;background:#fff7e7;border-radius:0 8px 8px 0;font-size:13px;line-height:1.6}.notice.green{border-color:var(--green);background:#eaf3e8}.notice strong{font-weight:750}.subnav{display:flex;flex-wrap:wrap;gap:8px;margin:25px 0}.subnav a{padding:8px 12px;border:1px solid var(--line);border-radius:6px;background:white;text-decoration:none;font-size:13px}.footer{border-top:1px solid var(--line);padding:22px 30px;max-width:1440px;margin:auto;display:flex;gap:20px;justify-content:space-between;color:var(--muted);font-size:12px}.footer a{color:inherit}
.hero{display:grid;grid-template-columns:1.02fr 1fr;background:var(--navy);border-radius:22px;overflow:hidden;min-height:450px;color:#fff}.hero-copy{padding:48px 40px}.hero .eyebrow{color:var(--lime)}.hero h1{font-size:clamp(38px,4.4vw,63px);line-height:1.03;letter-spacing:-2.9px;margin:22px 0}.hero p{color:#bbd2c6;font-size:16px;max-width:530px}.hero-photo{position:relative;background:#e4e9e0;overflow:hidden;display:flex;align-items:center;justify-content:center}.hero-photo img{width:100%;height:100%;object-fit:cover}.hero-caption{position:absolute;bottom:18px;left:20px;background:#fffef1ed;color:var(--ink);padding:10px 14px;border-radius:7px;font-size:11px;backdrop-filter:blur(10px)}.hero-caption strong{display:block;font-size:13px}.stat-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;border:1px solid var(--line);margin:22px 0 38px;border-radius:14px;overflow:hidden;background:var(--line)}.stat-strip>div{padding:19px 23px;background:#fff}.stat-strip strong{font-size:25px;display:block;letter-spacing:-1px}.stat-strip small{color:var(--muted);font-size:12px}.number{display:inline-grid;place-items:center;width:33px;height:33px;border-radius:50%;font:13px var(--mono);background:#eaf3e8;color:var(--green);margin-bottom:10px}.link-card{display:block;text-decoration:none;color:var(--ink);transition:transform .15s,border-color .15s}.link-card:hover{transform:translateY(-3px);border-color:#6b9c70}.link-card .arrow{float:right;color:var(--green);font-size:23px}.link-card p{font-size:14px;color:var(--muted)}.mini-label{font:10px var(--mono);letter-spacing:1px;color:var(--muted)}
.lab-main{padding-top:28px}.lab-heading{margin-bottom:22px}.lab-heading h1{font-size:35px;letter-spacing:-1.3px;margin:3px 0 6px}.lab-heading p{font-size:13px;margin:0;color:var(--muted)}.lab-grid{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:18px;align-items:start}.arena-card{background:var(--navy);border:1px solid #1d443c;border-radius:15px;overflow:hidden;color:white}.arena-toolbar{padding:13px 17px;display:flex;align-items:center;justify-content:space-between;gap:10px;background:#13332d;font-size:12px;flex-wrap:wrap}.arena-toolbar button{background:#23433a;border-color:#426151;color:#d5e7da;font-size:11px;padding:6px 10px}.arena-toolbar button.active{background:var(--lime);color:#153c2a;border-color:var(--lime)}.arena-wrap{height:465px;position:relative}.arena-wrap canvas{width:100%;height:100%;display:block;touch-action:none}.arena-legend{display:flex;gap:17px;flex-wrap:wrap;padding:12px 17px;background:#13332d;border-top:1px solid #315044;font-size:10px;color:#b7d0c1}.arena-legend span:before{content:'';width:7px;height:7px;display:inline-block;background:var(--lime);border-radius:50%;margin-right:6px}.arena-legend .cyan:before{background:#46d9cf}.arena-legend .amber:before{background:#ffc069}.arena-legend .gray:before{background:#89a29d}.telemetry{display:grid;grid-template-columns:repeat(5,1fr);background:#fff;border:1px solid var(--line);border-radius:12px;margin-top:14px;padding:17px 0}.telemetry>div{padding:0 15px;border-right:1px solid var(--line)}.telemetry>div:last-child{border:none}.telemetry strong{font:600 18px var(--mono);display:block;margin-top:7px}.telemetry span{font-size:10px;text-transform:uppercase;letter-spacing:.7px;color:var(--muted)}.control-panel{padding:20px}.control-panel h2{font-size:16px;margin:0 0 14px}.control-panel label{font-size:12px;color:var(--muted);display:block;margin:13px 0 7px}.control-panel select{width:100%;border:1px solid var(--line);padding:9px;border-radius:6px;background:#fff}.control-panel input[type=range]{width:100%;accent-color:var(--green)}.control-panel .row button{flex:1}.control-panel hr{border:0;border-top:1px solid var(--line);margin:18px 0}.dpad{display:grid;grid-template-columns:repeat(3,1fr);gap:5px;max-width:222px;margin:14px auto}.dpad button{padding:13px 8px;font-size:16px;touch-action:none;user-select:none}.dpad .forward{grid-column:2}.dpad .reverse{grid-column:2}.dpad button.pressed{background:var(--green);color:#fff}.keys{font-size:11px;color:var(--muted);line-height:1.65;text-align:center}.keys kbd{font:10px var(--mono);padding:2px 4px;background:#edf1e9;border:1px solid var(--line);border-radius:3px}.full{width:100%}.control-panel .danger{padding:13px;margin-top:8px}.checkrow{display:flex!important;gap:8px;align-items:center;cursor:pointer;line-height:1.4}.checkrow input{accent-color:var(--green)}.status-line{font:11px var(--mono);padding:12px 15px;background:#edf3e9;border-radius:8px;margin-top:12px;min-height:43px;line-height:1.5}.protocol-grid{display:grid;grid-template-columns:1.12fr 1fr;gap:18px;margin-top:22px}.protocol-grid .card{padding:20px;min-width:0}.protocol-grid h2{font-size:17px;margin:0 0 14px}.protocol-grid pre{padding:15px;font-size:11px;margin-bottom:8px;min-height:53px}.wire-table{width:100%;font-size:11px;border-collapse:collapse}.wire-table td,.wire-table th{text-align:left;border-bottom:1px solid var(--line);padding:9px 5px}.wire-table td:not(:first-child),.wire-table th:not(:first-child){text-align:right;font-family:var(--mono)}.logs{height:180px;overflow:auto;border:1px solid var(--line);border-radius:8px;background:#f7f9f4;padding:10px;margin-top:14px;font:10px var(--mono);line-height:1.9}.logs div{border-bottom:1px solid #e4ebe1;padding:4px;overflow-wrap:anywhere}.waypoints{font-size:11px;color:var(--muted);max-height:75px;overflow:auto;line-height:1.7}.details-compact summary{font-size:12px;cursor:pointer;margin-top:16px;font-weight:700}.details-compact p{font-size:12px}.export-row{margin-top:15px}.export-row button{font-size:11px;padding:7px 10px}
.doc-layout{display:grid;grid-template-columns:220px minmax(0,1fr);gap:30px;align-items:start}.toc{position:sticky;top:22px;padding:19px}.toc h3{font-size:12px;text-transform:uppercase;letter-spacing:1px}.toc a{display:block;padding:8px 0;font-size:12px;text-decoration:none;color:var(--muted);line-height:1.4}.document{min-width:0}.document h1{font-size:30px}.document h2{padding-top:16px;margin-top:32px;border-top:1px solid var(--line)}.document h3{margin-top:26px}.document p,.document li{font-size:14px;line-height:1.7}.document li{margin-bottom:7px}.document table{width:100%;border-collapse:collapse;background:#fff;font-size:12px;margin:20px 0}.document td,.document th{border:1px solid var(--line);padding:11px 12px;text-align:left;vertical-align:top;line-height:1.6}.document th{background:#eaf0e5}.table-scroll{overflow:auto}.architecture{background:#fff;border:1px solid var(--line);padding:12px;border-radius:14px;width:100%;height:auto}.filters{display:flex;gap:12px;flex-wrap:wrap;margin:25px 0 20px}.filters input,.filters select{padding:12px;border:1px solid #c9d8cb;border-radius:8px;background:#fff;min-width:170px}.filters input{flex:1;min-width:220px}.qa-item{background:#fff;border:1px solid var(--line);border-radius:10px;margin:10px 0;overflow:hidden}.qa-item summary{padding:18px 20px;cursor:pointer;list-style:none;display:flex;align-items:start;gap:13px;font-size:14px;line-height:1.5;font-weight:650}.qa-item summary::-webkit-details-marker{display:none}.qa-item summary:after{content:'+';font-size:20px;color:var(--green);margin-left:auto;padding-left:10px}.qa-item[open] summary:after{content:'−'}.qa-id{font:11px var(--mono);color:var(--green);padding-top:4px;white-space:nowrap}.qa-answer{padding:0 24px 20px 87px;font-size:14px;line-height:1.75}.qa-answer .source{font-size:11px;color:var(--muted);border-top:1px solid var(--line);padding-top:12px;margin-top:14px}.qa-answer .pill{margin-bottom:8px}.search-meta{font-size:12px;color:var(--muted)}.bom-table input{width:100%;min-width:72px;border:1px solid #d3dfcf;border-radius:5px;padding:7px;background:#fbfcf9;font:12px var(--mono)}.bom-table .name{min-width:190px}.bom-table{font-size:12px;width:100%;border-collapse:collapse}.bom-table td,.bom-table th{padding:10px;border-bottom:1px solid var(--line);vertical-align:top;text-align:left}.bom-table small{display:block;color:var(--muted);line-height:1.5;margin-top:5px}.bom-total{font:650 24px var(--mono);color:var(--green)}.viewer-frame{width:100%;height:800px;border:1px solid var(--line);border-radius:14px;background:white}.download-list a{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:15px 0;border-bottom:1px solid var(--line);font-size:13px;text-decoration:none}.download-list a span{font:10px var(--mono);color:var(--muted)}
@media(max-width:1100px){.edition{display:none}.topbar{gap:12px;padding:12px 20px}.topbar nav a{padding:8px}.lab-grid{grid-template-columns:minmax(0,1fr) 280px}.arena-wrap{height:420px}.cols4{grid-template-columns:repeat(2,1fr)}.hero-copy{padding:35px 30px}.topbar .wordmark{font-size:16px}}
@media(max-width:820px){.topbar{flex-wrap:wrap}.topbar nav{width:100%;margin:0;overflow-x:auto;flex-wrap:nowrap}.topbar nav a{white-space:nowrap}.logo-box{height:45px;width:45px}main{padding:28px 18px 45px}.hero{grid-template-columns:1fr}.hero-photo{height:300px}.hero h1{font-size:43px}.lab-grid,.protocol-grid,.doc-layout{grid-template-columns:1fr}.control-panel .dpad{margin:10px auto}.control-panel{display:block}.arena-wrap{height:430px}.toc{position:static}.toc a{display:inline-block;margin-right:15px}.cols3,.cols2{grid-template-columns:1fr}.stat-strip{grid-template-columns:repeat(2,1fr)}.telemetry strong{font-size:15px}.telemetry>div{padding:0 10px}.telemetry span{font-size:9px}.page-title{font-size:37px}.qa-answer{padding-left:24px}.footer{flex-direction:column}.viewer-frame{height:850px}}
@media(max-width:460px){.arena-wrap{height:335px}.hero-copy{padding:27px}.hero h1{font-size:38px}.cols4{grid-template-columns:1fr}.telemetry{grid-template-columns:repeat(3,1fr);gap:17px}.lab-heading h1{font-size:29px}.arena-toolbar{font-size:10px}.card{padding:20px}.qa-item summary{padding:15px}.filters>*{width:100%}.hero-photo{height:230px}}
@media print{.topbar nav,.edition,.footer,.filters,button,.subnav,.toc{display:none!important}body{background:#fff}main{padding:0;max-width:none}.doc-layout{display:block}.card,.qa-item{break-inside:avoid}.qa-item .qa-answer{display:block!important}.qa-item summary{font-size:12px}.qa-answer{font-size:11px}.document h2{break-after:avoid}.page-title{font-size:28px}.hero{color:#000;background:#eee}.hero p,.hero .eyebrow{color:#333}}
/* Student edition 8: clearer entry points and simulation controls. */
.hero .hero-note{font:11px var(--mono);color:#d3ee8c;margin-top:24px;line-height:1.7}.flow-strip{display:flex;gap:9px;flex-wrap:wrap;align-items:center;margin:22px 0}.flow-strip span{border:1px solid #bed4be;background:#f2f7ee;padding:9px 12px;border-radius:7px;font-size:12px;font-weight:700}.flow-strip b{color:var(--green)}.purpose-list{margin:0}.purpose-list>div{display:grid;grid-template-columns:90px 1fr;gap:12px;padding:13px 0;border-bottom:1px solid var(--line)}.purpose-list dt{font-size:13px;font-weight:750}.purpose-list dd{margin:0;font-size:13px;line-height:1.7;color:var(--muted)}.mission-intro{margin-bottom:22px;border-color:#adc6ab;background:linear-gradient(120deg,#f1f7e9,#fff);padding:22px 26px}.mission-intro h2{margin:0 0 8px;font-size:23px}.mission-intro p{max-width:810px;margin:8px 0;font-size:14px}.mission-start{font-size:15px;padding:15px 22px;box-shadow:0 4px 14px #17694a1c}.mission-actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.mission-steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px;padding-left:24px;margin:22px 0 4px}.mission-steps li{padding-left:3px;font-size:12px;color:var(--muted);line-height:1.7}.mission-steps strong{color:var(--ink)}.mission-progress{display:grid;grid-template-columns:1.1fr 1.6fr 1fr 1fr;border:1px solid var(--line);background:white;border-radius:10px;margin-top:12px;overflow:hidden}.mission-progress>div{padding:12px 14px;border-right:1px solid var(--line)}.mission-progress>div:last-child{border:0}.mission-progress span{display:block;font-size:9px;letter-spacing:.6px;color:var(--muted);text-transform:uppercase}.mission-progress strong{display:block;margin-top:6px;font:600 12px var(--mono)}#missionHelp{font-size:12px;line-height:1.6;margin-top:10px;color:var(--green)}details>summary{cursor:pointer;line-height:1.6}.student-addition{scroll-margin-top:20px}.student-addition h2{border:0;padding-top:0;margin-top:8px}.brief-link{margin-bottom:24px}
@media(max-width:820px){.mission-steps{grid-template-columns:1fr;gap:9px}.mission-intro{padding:20px}.mission-progress{grid-template-columns:repeat(2,minmax(0,1fr))}.mission-progress>div:nth-child(2){border-right:0}.mission-progress>div:nth-child(-n+2){border-bottom:1px solid var(--line)}.mission-actions{width:100%}.mission-start{flex:1}}
@media(max-width:460px){.mission-start{font-size:13px;padding:14px}.purpose-list>div{grid-template-columns:1fr;gap:5px}.mission-intro h2{font-size:20px}.mission-progress strong{font-size:11px}.mission-actions button{width:100%}}
/* Navigation Studio v9 */
html{scroll-behavior:smooth}section[id]{scroll-margin-top:24px}.topbar nav a{font-size:12px}.studio-tagline{max-width:780px}.zoom-toolbar{display:flex;gap:6px;align-items:center;flex-wrap:wrap}.navigation-events{border:1px solid #c7dbca;background:#f0f6ec;border-radius:10px;padding:14px 16px;margin-top:12px}.navigation-events h3{font-size:13px;margin:0 0 7px}.navigation-events p{font-size:12px;line-height:1.6;margin:0}.obstacle-tools{border-top:1px solid var(--line);margin-top:18px;padding-top:18px}.obstacle-tools p{font-size:12px;color:var(--muted);line-height:1.6}.obstacle-tools .row{gap:8px}.obstacle-tools button{font-size:12px}.route-summary{display:flex;gap:15px;flex-wrap:wrap;font:11px var(--mono);color:var(--muted);margin:12px 0}.route-summary strong{color:var(--green)}#navigationEvent{font-size:13px;line-height:1.55;color:var(--green)}.control-panel h2{line-height:1.5}.control-panel .row button{font-size:12px;padding:10px 8px}.arena-wrap{height:520px}.arena-legend{line-height:1.5}.control-panel .full{white-space:normal}.integrated-viewer-intro{display:flex;gap:25px;align-items:end;justify-content:space-between;margin:50px 0 22px}.integrated-viewer-intro h2{font-size:35px;margin:0 0 12px}.integrated-viewer-intro p{max-width:700px;margin:0;color:var(--muted);font-size:14px}.integrated-viewer-intro a{white-space:nowrap}.viewer-loading-panel{padding:45px;background:#fff;border:1px solid var(--line);border-radius:18px;text-align:center}.viewer-loading-panel p{color:var(--muted)}
@media(max-width:820px){.arena-wrap{height:440px}.integrated-viewer-intro{align-items:start;flex-direction:column;gap:15px}.integrated-viewer-intro h2{font-size:29px}}
@media(max-width:460px){.arena-wrap{height:365px}.zoom-toolbar button{padding:6px 8px}.route-summary{font-size:10px}.viewer-loading-panel{padding:28px 20px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.link-card{transition:none}}
.navigation-panel{background:#123a31;padding:12px 16px;border-bottom:1px solid #456759}.navigation-panel #navigationEvent{background:#e9f5dc;color:#153d29;margin:0;border-left:4px solid #9fce67;font:600 13px/1.6 ui-sans-serif,system-ui,sans-serif}.navigation-panel .route-summary{color:#c0d7ca;margin:10px 0 7px}.navigation-panel .route-summary strong{color:#d3ee8c}.navigation-panel ol.navigation-events{border:0;padding:0 0 0 17px;background:transparent;margin:0;color:#b9d0c2;font:10px/1.7 var(--mono)}.navigation-panel ol.navigation-events li{padding:1px 0}.obstacle-tools h3{font-size:15px;margin:0 0 8px}.obstacle-tools .full{margin-top:7px}.zoom-toolbar .row{gap:6px}.zoom-toolbar #zoomLabel{font:10px var(--mono);color:#d5e7da}.zoom-toolbar button[aria-pressed="true"]{background:#d3ee8c;color:#153c2a;border-color:#d3ee8c}.mission-intro .mission-steps li{font-size:12px}