:root{--ink:#143c40;--muted:#546769;--paper:#faf8f1;--lime:#d5ef9f;--line:#d6ddd3;--cyan:#bdeaf1;--font:ui-rounded,'Trebuchet MS',system-ui,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.6 var(--font)}a{color:inherit;text-underline-offset:4px}button,input,select{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.6}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #946313;outline-offset:4px}[hidden]{display:none!important}.topbar{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:20px 5%;border-bottom:1px solid var(--line);background:var(--paper)}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;font-size:25px;font-weight:800;line-height:1.1}.brand small{display:block;font-size:9px;letter-spacing:1.6px;margin-top:8px}.brand-icon{font:bold 32px monospace;color:var(--ink);letter-spacing:-9px;padding-right:10px;background:var(--lime);width:48px;height:44px;border-radius:13px;display:flex;align-items:center;justify-content:center}.brand-icon span{color:#2d8289}.topbar nav{display:flex;gap:25px;font-size:14px;font-weight:700}.topbar nav a{text-decoration:none}.topbar nav a[aria-current=page]{text-decoration:underline;text-decoration-thickness:2px}.btn{display:inline-flex;justify-content:center;align-items:center;gap:24px;padding:15px 23px;border:1px solid var(--ink);border-radius:12px;text-decoration:none;font-size:15px;font-weight:700;min-height:48px}.btn.dark{color:var(--paper);background:var(--ink)}.btn.light{background:white;color:var(--ink)}.btn.small{padding:10px 17px;font-size:13px}.btn:hover{transform:translateY(-1px);box-shadow:0 3px 0 #143c4018}.text-link{font-size:14px;font-weight:700;text-decoration:none;border-bottom:1px solid}.hero{max-width:1360px;margin:auto;padding:70px 5% 55px;display:grid;grid-template-columns:1.13fr 1fr;gap:45px;align-items:center}.eyebrow{font-size:11px;font-weight:800;letter-spacing:1.8px;margin:0 0 15px;line-height:1.5}.dot{display:inline-block;width:8px;height:8px;background:#428e76;border-radius:50%;margin-right:7px}h1{font-size:clamp(38px,4.5vw,65px);letter-spacing:-2.5px;line-height:1.08;margin:20px 0 25px}h1 span{color:#317e86}h2{font-size:clamp(29px,3vw,42px);letter-spacing:-1.3px;line-height:1.15;margin:0 0 14px}h3{font-size:22px;line-height:1.25;margin:10px 0}p{margin:0 0 16px}.hero-lead{color:var(--muted);font-size:17px;line-height:1.7}.hero-actions{display:flex;align-items:center;gap:24px;margin:28px 0 35px}.hero-facts{display:flex;flex-wrap:wrap;gap:20px;font-size:12px;color:var(--muted)}.hero-facts b{color:var(--ink);font-size:16px}.hero-art{position:relative;min-height:465px;border-radius:120px 120px 30px 30px;background:#e5ecde;background-image:radial-gradient(#bccbbb 1px,transparent 1px);background-size:20px 20px;display:flex;flex-direction:column;align-items:center;padding:30px 20px 25px}.orbit-label{font-size:9px;letter-spacing:2px;font-weight:800}.robot{width:85%;height:285px;display:block;margin:-8px 0 -23px}.mini-lab{width:78%;background:var(--ink);color:#f2f4e7;border-radius:15px;box-shadow:0 9px 0 #143c4014;transform:rotate(-3deg);padding:0 20px 15px;z-index:1}.window-head{display:flex;justify-content:space-between;align-items:center;font-size:9px;letter-spacing:1px;padding:11px 0;border-bottom:1px solid #537276;margin-bottom:12px}.window-head i{display:inline-block;width:6px;height:6px;background:#9faea2;border-radius:50%;margin-right:4px}.mini-lab code{font:14px/1.8 ui-monospace,monospace}.code-name{color:var(--lime)}.lab-result{display:flex;align-items:center;gap:15px;padding-top:12px;margin-top:10px;border-top:1px solid #537276;font-size:11px}.lab-result strong{font-size:25px;color:var(--lime)}.lab-result div{margin-left:auto;display:flex;gap:6px}.lab-result button{color:var(--paper);background:#ffffff10;border:1px solid #809b97;border-radius:6px;min-width:35px;min-height:35px}.mini-lab small{font-size:9px;color:#c4d4cc;display:block;margin-top:10px}.sticker{position:absolute;right:-15px;top:78px;transform:rotate(9deg);font-size:12px;background:#fbe4a7;border:1px solid #dec481;padding:15px;border-radius:12px;line-height:1.4;box-shadow:0 4px 0 #143c400a}.progress-strip{max-width:1240px;margin:0 auto 70px;padding:23px 30px;background:#edf1e7;border:1px solid var(--line);border-radius:16px;display:flex;align-items:center;gap:35px}.progress-strip .eyebrow{margin-bottom:4px;font-size:9px}.progress-strip p{margin:0;font-size:14px;font-weight:700}.progress-track{height:9px;background:#d8e0d1;border-radius:20px;flex:1;overflow:hidden}.progress-track div{height:100%;background:#397e70;width:0;transition:width .3s}.route-section{max-width:1360px;margin:auto;padding:0 5% 70px}.section-head{display:flex;justify-content:space-between;align-items:end;gap:30px}.section-head p:not(.eyebrow){font-size:14px;color:var(--muted)}.search{display:flex;align-items:center;gap:10px;background:white;padding:10px 14px;border:1px solid var(--line);border-radius:10px;min-width:290px;margin-bottom:20px}.search span{font-size:26px}.search input{width:100%;min-width:0;border:0;outline-offset:8px;background:none;font-size:13px;color:var(--ink)}.filters{display:flex;flex-wrap:wrap;gap:8px;margin:22px 0 30px}.filters button{background:transparent;border:1px solid #bcc9bf;padding:9px 15px;border-radius:30px;color:var(--ink);font-size:12px;font-weight:700;min-height:40px}.filters button[aria-pressed=true]{background:var(--ink);color:white;border-color:var(--ink)}.stage-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.stage{background:#fffefa;border:1px solid #c9d2c8;border-radius:18px;overflow:hidden;display:flex;flex-direction:column}.stage-top{padding:22px 23px 19px;background:var(--stage)}.stage-number{display:flex;align-items:center;justify-content:space-between}.stage-number b{font:700 30px ui-monospace,monospace;opacity:.7}.stage-number span{font-size:9px;font-weight:800;letter-spacing:1px;border:1px solid #143c4040;padding:4px 8px;border-radius:20px}.stage-top h3{font-size:21px;letter-spacing:-.5px;min-height:53px;margin:14px 0 7px}.stage-top p{font-size:12px;margin:0;color:#2b4b4c}.lesson-list{list-style:none;padding:12px 20px;margin:0;flex:1}.lesson-list li{border-bottom:1px solid #e4e9e0}.lesson-list li:last-child{border:0}.lesson-list a{display:flex;align-items:center;gap:9px;padding:12px 0;font-size:12px;text-decoration:none;font-weight:700;min-height:45px}.lesson-list a:hover .lesson-title{text-decoration:underline}.lesson-n{font:11px ui-monospace,monospace;color:#637d7e;min-width:22px}.lesson-title{flex:1}.lesson-state{font-size:14px;color:#40756d}.stage-bottom{padding:12px 22px;border-top:1px solid #e0e5da;display:flex;justify-content:space-between;align-items:center;font-size:10px;color:var(--muted)}.stage-bottom a{font-weight:700;font-size:11px}.empty{padding:45px;background:#eef2e8;border-radius:15px;text-align:center}.empty button{margin:15px;border-radius:8px;border:1px solid;padding:10px;background:white}.project-teaser{max-width:1240px;margin:0 auto 80px;padding:50px;background:#e5eedc;border-radius:24px;display:grid;grid-template-columns:1.25fr 1fr;gap:70px;align-items:center}.project-teaser p:not(.eyebrow){font-size:14px;color:var(--muted);max-width:450px}.quest-card{background:white;border:1px solid var(--line);border-radius:15px;padding:28px;transform:rotate(2deg);box-shadow:8px 8px 0 #cdddc0}.quest-card small{font-size:9px;font-weight:800;letter-spacing:1.5px}.quest-card h3{font-size:24px;margin:12px 0 22px}.quest-card div{font-size:13px;margin:14px 0;display:flex;gap:12px;align-items:center}.quest-card a{font-size:12px;font-weight:700;display:block;margin-top:25px}.tick{background:var(--lime);width:24px;height:24px;display:inline-flex;justify-content:center;align-items:center;border:1px solid #92aa77;border-radius:5px}.tick.hollow{background:white;border-color:var(--line)}footer{padding:45px 5%;border-top:1px solid var(--line);display:grid;grid-template-columns:1fr 1.5fr;max-width:1360px;margin:auto;gap:20px;font-size:13px}footer .brand{font-size:22px}footer p{color:var(--muted);margin:0}footer div{display:flex;gap:20px;font-size:11px}footer small{font-size:10px;color:var(--muted)}.page{max-width:1100px;margin:auto;padding:50px 5% 80px}.page-head{margin-bottom:35px}.page-head h1{font-size:44px;letter-spacing:-1.5px}.page-head p{color:var(--muted);max-width:780px}.breadcrumb{font-size:12px;display:flex;flex-wrap:wrap;gap:10px;margin-bottom:24px}.lesson-layout{display:grid;grid-template-columns:minmax(0,1fr) 255px;gap:35px;align-items:start}.lesson-body{min-width:0}.lesson-sidebar{position:sticky;top:25px;padding:22px;background:#edf1e7;border:1px solid var(--line);border-radius:15px;font-size:12px}.lesson-sidebar h3{font-size:16px}.lesson-sidebar ol{padding-left:18px}.lesson-sidebar li{margin:9px 0}.lesson-sidebar a[aria-current=step]{font-weight:800}.lesson-section{background:white;border:1px solid var(--line);border-radius:16px;padding:28px;margin:0 0 24px}.lesson-section h2{font-size:25px;letter-spacing:-.6px}.lesson-section p{font-size:16px}.lesson-section ol{padding-left:22px;font-size:14px}.lesson-section ol li{padding-left:6px;margin:8px 0}.notice{background:#fff0ca;border:1px solid #d7c59d;border-radius:12px;padding:16px;margin-bottom:23px;font-size:13px}.code-box{background:#143237;border-radius:12px;color:#e5f0e5;overflow:hidden;margin:16px 0}.code-bar{display:flex;justify-content:space-between;align-items:center;padding:10px 15px;border-bottom:1px solid #3a575c;font:11px ui-monospace,monospace;gap:10px}.code-bar button{background:#ffffff10;color:white;border:1px solid #809997;border-radius:7px;padding:7px 12px;font-size:11px;min-height:35px}.code-box pre{margin:0;padding:22px;overflow:auto;tab-size:4;font:13px/1.8 ui-monospace,SFMono-Regular,Consolas,monospace;white-space:pre;max-height:580px}.output{border:1px dashed #a7bca8;border-radius:10px;padding:15px;background:#f2f6ec}.output small{display:block;font-size:10px;font-weight:800;letter-spacing:1px;margin-bottom:10px}.output pre{white-space:pre-wrap;overflow-wrap:anywhere;font:13px/1.7 ui-monospace,monospace;margin:0}.code-actions{display:flex;flex-wrap:wrap;gap:12px;margin:20px 0}.code-actions a{font-size:12px}.mission{background:#ecf3de}.mission .eyebrow{color:#3b633a}.lesson-section details{border-top:1px solid #cdd7c5;margin-top:18px;padding-top:14px}.lesson-section summary{font-size:14px;font-weight:700;cursor:pointer;min-height:32px}.lesson-section details p{margin-top:14px;font-size:14px}.lesson-section details pre{font:12px/1.7 ui-monospace,monospace;white-space:pre-wrap;overflow-wrap:anywhere;background:#f9fbf5;padding:16px;border-radius:8px}.quiz-options{display:grid;gap:10px;margin:18px 0}.quiz-option{text-align:left;border:1px solid #b7c9c2;border-radius:10px;background:#fafcf7;padding:13px 16px;font-size:14px;min-height:48px;color:var(--ink)}.quiz-option:hover{background:#edf3e4}.quiz-option[aria-pressed=true]{border:2px solid #407968;background:#dcebd1}.quiz-feedback{background:#edf2e6;padding:15px;border-radius:10px;font-size:14px}.checks{display:grid;gap:10px;margin:18px 0;font-size:14px}.checks label{display:flex;gap:10px;align-items:start}.checks input{width:20px;height:20px;accent-color:#356f5e}.lesson-nav{display:flex;justify-content:space-between;flex-wrap:wrap;gap:15px;margin-top:30px}.project-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.project-item{border:1px solid var(--line);border-radius:18px;padding:28px;background:white}.project-item small{font-size:10px;font-weight:800;letter-spacing:1px}.project-item h2{font-size:26px;margin-top:15px}.project-item p,.project-item li{font-size:14px}.project-item ul{padding-left:20px}.glossary-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.glossary-grid article{padding:23px;background:white;border:1px solid var(--line);border-radius:12px}.glossary-grid h2{font-size:22px}.glossary-grid small{font:12px monospace;color:#317e86}.glossary-grid p{font-size:14px}.grown-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.grown-grid article{padding:28px;background:white;border:1px solid var(--line);border-radius:15px}.grown-grid article h2{font-size:23px}.grown-grid p,.grown-grid li{font-size:14px}.grown-grid ul{padding-left:20px}.transfer{display:flex;flex-wrap:wrap;gap:10px}.transfer button,.import-btn{border:1px solid #809b90;border-radius:8px;background:#edf2e6;padding:10px 14px;font-size:13px;cursor:pointer}.import-btn{display:flex;align-items:center}.import-btn input{max-width:190px;font-size:11px}.toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%);max-width:90vw;background:var(--ink);color:white;border-radius:12px;padding:13px 22px;font-size:13px;z-index:10;display:none}.toast.show{display:block}.skip{position:fixed;top:-80px;left:15px;background:white;padding:12px;z-index:20}.skip:focus{top:10px}.sr-only{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media(min-width:1500px){.topbar{padding-left:calc((100vw - 1240px)/2);padding-right:calc((100vw - 1240px)/2)}}@media(max-width:1000px){.topbar nav{gap:16px;font-size:12px}.brand{font-size:21px}.brand small{font-size:8px}.hero{gap:30px}.hero-art{min-height:415px}.robot{height:235px}.hero-actions{flex-wrap:wrap;gap:16px}.stage-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.progress-strip,.project-teaser{margin-left:5%;margin-right:5%}.lesson-layout{grid-template-columns:1fr}.lesson-sidebar{position:static;order:-1}.lesson-sidebar ol{display:flex;flex-wrap:wrap;gap:4px 24px}.lesson-sidebar li{margin:3px 0}.project-teaser{gap:40px;padding:35px}}@media(max-width:700px){body{font-size:16px}.topbar{flex-wrap:wrap;gap:18px;padding:17px 5%}.topbar .small{margin-left:auto}.topbar nav{order:3;width:100%;justify-content:space-between;gap:10px}.hero{grid-template-columns:1fr;padding-top:35px;gap:35px}.hero h1{font-size:44px;letter-spacing:-1.8px}.hero-art{max-width:450px;width:100%;margin:auto;min-height:430px}.robot{height:265px}.sticker{right:2px;top:68px}.hero-facts{gap:13px}.hero-facts span{font-size:11px}.progress-strip{margin-bottom:45px;padding:20px;flex-wrap:wrap;gap:16px}.progress-strip>div:first-child{width:100%}.progress-track{min-width:100px}.progress-strip .text-link{font-size:12px}.section-head{display:block}.search{min-width:0;margin-top:24px}.stage-grid{grid-template-columns:1fr}.stage-top h3{min-height:0}.lesson-list a{font-size:14px}.stage-bottom{font-size:11px}.project-teaser{grid-template-columns:1fr;padding:28px;margin-bottom:40px}.quest-card{transform:rotate(0)}footer{grid-template-columns:1fr;padding-top:30px}.page{padding-top:30px}.page-head h1{font-size:36px}.project-grid,.glossary-grid,.grown-grid{grid-template-columns:1fr}.lesson-section{padding:21px}.code-box pre{font-size:12px;padding:16px}.lesson-nav .btn{font-size:12px;padding:12px}.lesson-sidebar ol{display:block}.lesson-sidebar li{margin:7px 0}.mini-lab{width:88%}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}.btn:hover{transform:none}}@media print{.topbar,footer,.hero-art,.filters,.search,.btn,.toast,.code-actions,.code-bar button,.lesson-sidebar,.lesson-nav,.transfer{display:none!important}body{background:white;color:black;font-size:11pt}.hero,.project-teaser,.project-grid,.glossary-grid,.grown-grid,.lesson-layout{display:block}.lesson-section,.stage,.project-item,article{break-inside:avoid;border:1px solid #aaa}.code-box{background:white;color:black;border:1px solid #aaa}.code-box pre{max-height:none;white-space:pre-wrap}.stage-grid{display:block}.stage{margin:20px 0}.lesson-section details[open]{display:block}.page{padding:0;max-width:none}}
