:root{--ink:#203b37;--muted:#60716a;--line:#dce3db;--paper:#fffefa;--bg:#f4f2e9;--green:#194f43;--mint:#e6eee5;--orange:#bc602c;color-scheme:light}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:2rem}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.75 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}a{color:var(--green);text-underline-offset:.22em}a:focus-visible,summary:focus-visible{outline:3px solid #de9a54;outline-offset:5px}.skip{position:absolute;top:-5rem;left:1rem;z-index:5}.skip:focus{top:1rem;background:white;padding:.7rem}.topbar{max-width:1240px;padding:1.6rem 2rem;margin:auto;display:flex;justify-content:space-between;align-items:center;gap:1rem;border-bottom:1px solid var(--line)}.wordmark{text-decoration:none;font-size:1.15rem;letter-spacing:.14em;font-weight:800}.wordmark span{font-weight:400;margin-left:.35rem}.topbar nav{display:flex;align-items:center;gap:1.7rem;font-size:.85rem}.topbar nav a{text-decoration:none}.nav-course{border:1px solid var(--green);border-radius:99px;padding:.45rem .95rem}.overview-hero{max-width:1240px;margin:auto;display:grid;grid-template-columns:1.35fr 1fr;gap:4rem;padding:4.8rem 2rem 5rem;align-items:center}.eyebrow{text-transform:uppercase;font-size:.73rem;font-weight:750;letter-spacing:.13em;color:var(--orange);margin:0 0 1.1rem}h1{font:400 clamp(3rem,6vw,5.5rem)/1.06 Georgia,serif;letter-spacing:-.045em;margin:.5rem 0 1.6rem}h1 em{font-weight:400;color:var(--green)}.lead{font-size:1.15rem;line-height:1.8;max-width:650px}.hero-copy>p:not(.eyebrow){max-width:620px;color:var(--muted)}.hero-copy strong{color:var(--ink)}.hero-actions{display:flex;gap:1.4rem;align-items:center;flex-wrap:wrap;margin-top:2rem}.button{display:inline-flex;align-items:center;gap:1.5rem;border-radius:5px;background:var(--green);color:white;padding:.9rem 1.2rem;text-decoration:none;font-weight:600;font-size:.85rem}.button span{font-size:1.3rem}.text-link{font-size:.83rem}.hero-note{background:#e9eddf;border:1px solid #d5ddcb;border-radius:160px 160px 12px 12px;padding:2.5rem 2rem 2rem;text-align:center}.orbit-mark{border:1px solid #b1c3ae;border-radius:50%;height:145px;width:145px;margin:0 auto 2rem;display:grid;place-items:center;box-shadow:0 0 0 15px #e1e8d7,0 0 0 16px #cbd6bf}.orbit-mark span{font:italic 3.4rem Georgia,serif}.hero-note .eyebrow{font-size:.65rem;color:var(--green);margin-top:2.4rem}.note-title{font:1.8rem/1.3 Georgia,serif}.hero-facts{display:grid;grid-template-columns:repeat(3,1fr);gap:.7rem;border-top:1px solid #cbd6bf;padding-top:1.2rem;margin-top:1.6rem}.hero-facts strong{display:block;font:2.1rem Georgia,serif}.hero-facts span{font-size:.72rem;line-height:1.5;display:block;color:var(--muted)}.overview-main{max-width:1240px;margin:auto;padding:0 2rem}h2{font:400 clamp(2rem,3.5vw,3rem)/1.15 Georgia,serif;letter-spacing:-.025em;margin:.4rem 0 1.5rem}h3{font-size:1.05rem;line-height:1.4;margin:.4rem 0 .8rem}p{margin:.8rem 0 1rem}strong{font-weight:650}.intro-grid{display:grid;grid-template-columns:1fr 1.4fr;gap:5rem;padding:3.5rem 0;border-top:1px solid var(--line)}.intro-grid>div:last-child{color:var(--muted)}.section-heading{display:grid;grid-template-columns:1.2fr 1fr;gap:4rem;align-items:end;margin-bottom:2rem}.section-heading>p{color:var(--muted);max-width:490px}#section-2,#section-3,#section-4,#section-5{padding:4rem 0;border-top:1px solid var(--line)}.architecture{border:1px solid #becdbf;border-radius:12px;overflow:hidden;background:var(--paper)}.arch-git{background:#e9eedf;padding:1.25rem 1.6rem;display:flex;justify-content:space-between;align-items:center;gap:1rem}.arch-label{font-size:.7rem;text-transform:uppercase;letter-spacing:.09em;color:var(--muted)}.arch-git strong{font-size:.9rem}.arch-columns{display:grid;grid-template-columns:1fr 1.2fr}.management-zone{background:var(--green);color:#f2f4e8;padding:2rem}.zone-kicker{font-size:.7rem;text-transform:uppercase;letter-spacing:.09em;margin:0 0 1.4rem}.management-zone h3{font:1.65rem/1.25 Georgia,serif}.service-grid{display:grid;grid-template-columns:1fr 1fr;gap:.65rem;margin:1.7rem 0}.service-grid>div{padding:.8rem;border:1px solid #52766a;border-radius:5px}.service-grid strong{display:block;font-size:.93rem}.service-grid span{display:block;font-size:.73rem;color:#c7d8cb}.zone-note{font-size:.8rem;color:#c7d8cb;margin-top:1.5rem}.runtime-zone{padding:2rem}.runtime-zone>.zone-kicker{color:var(--muted)}.layer{padding:1.05rem 1.15rem;border:1px solid var(--line);border-radius:5px;margin:.7rem 0;background:#f8f8f1}.layer span{display:block;font-size:.68rem;letter-spacing:.08em;text-transform:uppercase;color:var(--orange);margin-bottom:.4rem}.layer strong{font-size:1rem}.layer p{font-size:.82rem;color:var(--muted);line-height:1.6;margin:.35rem 0 0}.layer-app{background:#eaf1e8}.arch-foundation,.arch-edge{display:flex;gap:1rem;align-items:center;justify-content:space-between;padding:1rem 1.6rem;border-top:1px solid var(--line)}.arch-foundation{background:#e9eedf}.arch-edge{background:#faf8f0}.arch-foundation strong,.arch-edge strong{font-size:.83rem;flex:1}.arch-foundation span,.arch-edge span{font-size:.74rem;color:var(--muted);flex:1.2}.architecture-notes{display:grid;grid-template-columns:repeat(3,1fr);gap:1.8rem;margin-top:1rem}.architecture-notes p{font-size:.82rem;color:var(--muted)}.tech-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}.tech-grid article{border:1px solid var(--line);background:var(--paper);padding:1.3rem;border-radius:7px}.tech-grid article>span{font-size:.65rem;text-transform:uppercase;letter-spacing:.1em;color:var(--orange)}.tech-grid h3{margin-top:.6rem}.tech-grid p{font-size:.86rem;color:var(--muted);margin-bottom:0}.formats{padding:1rem 1.4rem;border:1px solid var(--line);margin-top:1.5rem;background:#eceee3;border-radius:7px}.formats summary{cursor:pointer;font-size:.88rem;font-weight:600}.formats dl{display:grid;grid-template-columns:70px 1fr;font-size:.85rem;gap:.5rem 1rem}.formats dt{font-weight:700}.formats dd{margin:0;color:var(--muted)}.repo-jumps{display:flex;gap:.7rem;flex-wrap:wrap;margin:1.5rem 0 2.8rem}.repo-jumps a{font-size:.8rem;padding:.35rem .8rem;border:1px solid #c7d4c7;border-radius:99px;text-decoration:none;background:var(--mint)}.repo-group{margin:3rem 0}.group-heading{display:flex;gap:1.2rem;align-items:flex-start;margin-bottom:1.2rem}.group-number{font:1.4rem Georgia,serif;color:var(--orange);padding-top:.1rem}.group-heading h3{font-size:1.25rem;margin-top:0}.group-heading p{font-size:.85rem;color:var(--muted);max-width:740px;margin:.3rem 0}.repo-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem}.repo-card{padding:1.5rem;border:1px solid var(--line);background:var(--paper);border-radius:7px;display:flex;flex-direction:column;min-width:0}.repo-meta{display:flex;justify-content:space-between;gap:1rem;font-size:.68rem;text-transform:uppercase;letter-spacing:.05em;color:var(--orange)}.repo-meta a{font-size:.72rem;letter-spacing:0;text-transform:none}.repo-card h4{font:600 1.05rem ui-monospace,Consolas,monospace;margin:1.1rem 0 .7rem;overflow-wrap:anywhere}.repo-role{font-weight:650;font-size:.9rem;margin:.3rem 0}.repo-card p:not(.repo-role){font-size:.85rem;color:var(--muted);line-height:1.75;margin:.5rem 0 1rem}.tags{display:flex;gap:.35rem;flex-wrap:wrap;margin-top:auto}.tags span{font-size:.68rem;line-height:1.5;padding:.25rem .5rem;background:#edf1e9;border-radius:3px;color:#456451}.delivery-flow{display:grid;grid-template-columns:repeat(5,1fr);list-style:none;padding:0;gap:1rem;margin:2rem 0}.delivery-flow li{border-top:2px solid #bacdb7;padding-top:1rem}.delivery-flow span{font-size:.75rem;color:var(--orange);display:block}.delivery-flow strong{display:block;margin:.3rem 0}.delivery-flow p{font-size:.8rem;color:var(--muted)}.principle-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:2rem;margin-top:2.5rem}.principle-grid p{font-size:.85rem;color:var(--muted)}.course-banner{display:flex;justify-content:space-between;align-items:center;gap:3rem;background:#e4eadb;border:1px solid #ced9c3;border-radius:10px;padding:2.5rem;margin:2rem 0 4rem}.course-banner>div{max-width:660px}.course-banner h2{font-size:2.3rem}.course-banner p:not(.eyebrow){font-size:.9rem;color:var(--muted)}.course-banner .button{white-space:nowrap}footer{max-width:1240px;margin:auto;padding:2.5rem 2rem 3rem;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:3rem;font-size:.75rem;color:var(--muted)}footer>div:first-child{max-width:680px}.footer-links{display:flex;flex-direction:column;gap:.7rem;min-width:160px}.course-hero{max-width:1240px;margin:auto;padding:4rem 2rem 3rem}.course-hero h1{font-size:clamp(3rem,6vw,5rem)}.course-hero>.lead{max-width:720px}.course-chips{display:flex;flex-wrap:wrap;gap:.6rem;margin-top:1.6rem}.course-chips span{padding:.3rem .7rem;font-size:.75rem;border-radius:99px;border:1px solid #cdd8c8;background:var(--mint)}.course-layout{max-width:1240px;margin:auto;display:grid;grid-template-columns:245px minmax(0,1fr);gap:3rem;padding:0 2rem 4rem}.course-sidebar{position:sticky;top:1rem;align-self:start;padding-top:2rem}.course-sidebar nav{display:flex;flex-direction:column;gap:.3rem}.course-sidebar nav a{font-size:.8rem;text-decoration:none;padding:.45rem .3rem;display:flex;gap:1rem}.course-sidebar nav span{font-size:.7rem;color:var(--orange);width:16px}.download{font-size:.78rem;display:block;margin:1.5rem 0}.course-sidebar>p:not(.eyebrow){font-size:.75rem;color:var(--muted);line-height:1.6}.course-content{border:1px solid var(--line);background:var(--paper);border-radius:9px;padding:2.5rem 3rem;min-width:0}.course-content p,.course-content li{font-size:1rem;line-height:1.9}.course-content h2{font-size:2rem;margin:3rem 0 1.2rem;padding-top:2rem;border-top:1px solid var(--line);line-height:1.3}.course-content h3{font-size:1.1rem;margin:1.8rem 0 .8rem}.course-content ul,.course-content ol{padding-left:1.35rem}.course-content li{margin:.6rem 0}.course-content a{overflow-wrap:anywhere}blockquote{padding:1rem 1.5rem;margin:1.5rem 0;background:#edf2e8;border-left:3px solid var(--green)}blockquote p:first-child{margin-top:0}blockquote p:last-child{margin-bottom:0}.exercise{border:1px solid #d8cfba;border-radius:7px;padding:1.25rem 1.5rem;margin:2rem 0;background:#f5efdf}.exercise-label{font-size:.65rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:#92542d}.exercise h3{margin:.5rem 0 .8rem}.exercise details{border-top:1px solid #dfd4bf;margin-top:1rem;padding-top:.8rem}.exercise summary{cursor:pointer;font-size:.9rem;font-weight:650;color:var(--green)}.table-wrap{max-width:100%;overflow:auto;margin:1.5rem 0;border:1px solid var(--line);border-radius:6px}table{border-collapse:collapse;width:100%;font-size:.86rem;line-height:1.6}th,td{text-align:left;vertical-align:top;padding:.7rem .9rem;border-bottom:1px solid var(--line);min-width:140px}th{background:var(--mint)}tr:last-child td{border-bottom:0}code{font:.85em ui-monospace,Consolas,monospace;background:#edf1e9;padding:.1rem .25rem;border-radius:3px;overflow-wrap:anywhere}
@media(max-width:950px){.overview-hero{gap:2rem}.hero-note{padding:2rem 1rem}.intro-grid,.section-heading{gap:2rem}.tech-grid{grid-template-columns:1fr 1fr}.course-layout{grid-template-columns:190px minmax(0,1fr);gap:1.5rem}.course-content{padding:1.8rem}.course-banner{padding:2rem;gap:1.5rem}.delivery-flow{grid-template-columns:repeat(3,1fr)}}
@media(max-width:700px){.topbar{padding:1rem;align-items:flex-start;flex-direction:column}.topbar nav{width:100%;gap:1rem;flex-wrap:wrap;font-size:.75rem}.wordmark{font-size:1rem}.overview-hero{grid-template-columns:1fr;padding:2.8rem 1.1rem;gap:2.5rem}.overview-hero h1{font-size:3.3rem}.lead{font-size:1rem}.hero-note{border-radius:100px 100px 9px 9px;padding:2rem 1.5rem}.orbit-mark{width:100px;height:100px;margin-top:.4rem}.orbit-mark span{font-size:2.5rem}.hero-note .eyebrow{margin-top:2rem}.overview-main{padding:0 1.1rem}.intro-grid,.section-heading,.arch-columns,.architecture-notes,.tech-grid,.repo-grid,.principle-grid{grid-template-columns:1fr;gap:1rem}.intro-grid{padding:2.5rem 0}.section-heading>p{margin-top:0}#section-2,#section-3,#section-4,#section-5{padding:2.8rem 0}.arch-git,.arch-foundation,.arch-edge{align-items:flex-start;flex-direction:column;gap:.4rem;padding:1rem}.management-zone,.runtime-zone{padding:1.3rem}.architecture-notes{gap:.1rem}.repo-card{padding:1.25rem}.group-heading{gap:.8rem}.group-heading h3{font-size:1.1rem}.delivery-flow{grid-template-columns:1fr 1fr}.course-banner{padding:1.4rem;display:block}.course-banner h2{font-size:2rem}.course-banner .button{margin-top:.8rem}footer{padding:2rem 1.1rem;flex-direction:column;gap:1rem}.course-hero{padding:2.5rem 1.1rem}.course-hero h1{font-size:3.2rem}.course-layout{padding:0 .7rem 2rem;grid-template-columns:1fr;gap:1rem}.course-sidebar{position:static;padding:.8rem}.course-sidebar nav{display:grid;grid-template-columns:1fr 1fr;gap:.2rem}.course-sidebar .eyebrow{margin-bottom:.5rem}.course-sidebar>p:not(.eyebrow){display:none}.course-content{padding:1.25rem}.course-content h2{font-size:1.7rem;overflow-wrap:anywhere}.course-content p,.course-content li{font-size:.96rem}.exercise{padding:1rem}th,td{min-width:130px;padding:.65rem}.formats dl{grid-template-columns:50px 1fr}}
@media print{body{background:white;color:black;font-size:10pt}.topbar,.skip,.course-sidebar,.hero-actions,.hero-note,.course-banner,.footer-links,.download{display:none}.overview-hero,.course-hero{display:block;padding:0;margin:0}.overview-hero h1,.course-hero h1{font-size:28pt}.overview-main,.course-layout{display:block;padding:0;margin:0;max-width:none}.course-content{padding:0;border:0}.course-content p,.course-content li{font-size:10pt;line-height:1.5}h2,.course-content h2{font-size:18pt;break-after:avoid;margin-top:1.5rem}h3{break-after:avoid}.intro-grid,.section-heading{display:block;gap:0}.repo-grid,.tech-grid{grid-template-columns:1fr 1fr}.repo-card,.tech-grid article,.exercise,blockquote{break-inside:avoid}.repo-card p{font-size:9pt}.architecture{break-inside:avoid}.management-zone{background:#eee;color:black}.management-zone span,.zone-note{color:#333}.table-wrap{overflow:visible}th,td{min-width:0;padding:.35rem}.exercise details{display:block}.exercise details>*{display:block}.exercise details>summary{display:none}a{color:black}footer{font-size:8pt;padding:1rem 0}.delivery-flow{grid-template-columns:repeat(5,1fr)}}
