:root{--ink:#112c34;--muted:#51676d;--paper:#f6f8f5;--white:#fff;--line:#d7e2db;--teal:#007d70;--mint:#bdf3d9;--navy:#102e36;--gold:#f9d47f;--radius:18px;font-family:Arial,Helvetica,sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;line-height:1.65}a{color:var(--teal);text-underline-offset:4px}a:hover{text-decoration-thickness:2px}button,input{font:inherit}button{cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #d78f14;outline-offset:4px}::selection{background:var(--mint);color:var(--navy)}.skip{position:absolute;top:-70px;left:20px;background:#fff;padding:10px;z-index:5}.skip:focus{top:10px}.wrap{max-width:1120px;margin:auto;padding:0 28px}.topbar{background:var(--navy);color:#fff;border-bottom:1px solid #335159}.topbar .wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:84px}.brand{color:#fff;text-decoration:none;display:flex;align-items:center;gap:12px;line-height:1.2;font-weight:700;font-size:18px;letter-spacing:-.4px}.brand small{display:block;font-size:10px;letter-spacing:2px;color:#afc7c8;font-weight:400;margin-top:5px}.mark{display:grid;place-items:center;width:36px;height:36px;background:var(--mint);color:var(--navy);border-radius:10px;font-size:20px}.topbar nav{display:flex;gap:28px;align-items:center}.topbar nav a{color:#c8dada;text-decoration:none;font-size:14px}.topbar nav a[aria-current=page],.topbar nav a:hover{color:var(--mint)}.hero{background:var(--navy);color:#fff;padding:70px 0 64px;overflow:hidden}.hero .wrap{display:grid;grid-template-columns:1.2fr 1fr;align-items:center;gap:64px}.eyebrow{font-size:11px;letter-spacing:2px;text-transform:uppercase;font-weight:700;color:var(--teal);margin:0 0 16px}.hero .eyebrow{color:var(--mint)}h1,h2,h3{line-height:1.18;margin:0 0 20px;letter-spacing:-1px}h1{font-size:clamp(38px,5.4vw,64px);font-weight:700}h2{font-size:32px}h3{font-size:21px;letter-spacing:-.4px}p{margin:0 0 18px}.hero .intro{font-size:17px;max-width:560px;color:#c6d9da;line-height:1.75}.button{display:inline-flex;align-items:center;gap:18px;padding:12px 21px;border-radius:8px;background:var(--teal);color:#fff;border:1px solid var(--teal);font-size:14px;font-weight:700;text-decoration:none}.button:hover{background:#00665c}.hero .button{background:var(--mint);color:var(--navy);border-color:var(--mint)}.button.secondary{background:transparent;color:var(--teal)}.hero .button.secondary{color:#fff;border-color:#5a787e;background:transparent}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}.diagram{position:relative;min-height:310px;display:flex;align-items:center;justify-content:center}.orbit{position:absolute;width:280px;height:280px;border:1px solid #3a646b;border-radius:50%}.orbit::before{content:"";position:absolute;inset:35px;border:1px dashed #3a646b;border-radius:50%}.cloud-core{position:relative;width:156px;padding:30px 12px;text-align:center;background:var(--mint);color:var(--navy);border-radius:28px;box-shadow:0 0 65px #72d4b321;z-index:1}.cloud-core span{font-size:34px;display:block;line-height:1.4}.cloud-core strong{font-size:17px}.node{position:absolute;background:#1e414a;border:1px solid #42656d;border-radius:12px;padding:9px 16px;color:#e1efed;font-size:12px;z-index:2;box-shadow:0 7px 20px #0002}.node b{display:block;color:var(--mint);font-size:13px}.node.one{top:0;left:0}.node.two{right:-8px;top:100px}.node.three{bottom:0;left:22px}.statbar{border-bottom:1px solid var(--line);background:#eaf1eb}.statbar .wrap{display:flex;justify-content:space-between;gap:20px;padding-top:17px;padding-bottom:17px;font-size:12px;color:var(--muted)}.statbar b{color:var(--ink);font-weight:700}.section{padding:56px 0}.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:26px}.section-head h2{margin:0}.section-head p{margin:0;color:var(--muted);font-size:14px;max-width:360px}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.card{background:var(--white);padding:28px;border:1px solid var(--line);border-radius:var(--radius)}.card p{font-size:14px;color:var(--muted)}.card .number{font-family:monospace;font-size:12px;color:var(--teal);margin-bottom:28px;display:block}.card a{font-weight:700;font-size:14px}.card h3{margin-bottom:14px}.strip{display:flex;justify-content:space-between;align-items:center;gap:30px;background:#dfede5;border-radius:var(--radius);padding:32px;margin-top:28px}.strip h3{margin-bottom:6px}.strip p{margin:0;color:var(--muted);font-size:14px}.footer{border-top:1px solid var(--line);padding:26px 0;color:var(--muted);font-size:12px}.footer .wrap{display:flex;justify-content:space-between;gap:20px}.footer a{color:var(--muted)}.page-head{padding:42px 0 34px;background:#eaf1eb;border-bottom:1px solid var(--line)}.crumbs{font-size:12px;color:var(--muted);margin-bottom:24px}.crumbs span{margin:0 9px}.page-head h1{font-size:42px;max-width:820px;margin-bottom:16px}.page-head p{max-width:700px;color:var(--muted);margin:0}.content-grid{display:grid;grid-template-columns:minmax(0,2fr) minmax(230px,1fr);gap:46px}.prose h2{font-size:25px;margin-top:34px;margin-bottom:14px}.prose h2:first-child{margin-top:0}.prose p,.prose li{font-size:16px;color:var(--muted)}.prose ul,.prose ol{padding-left:22px}.prose li{margin:10px 0}.side{background:#eaf1eb;border-radius:var(--radius);padding:26px;align-self:start}.side h2{font-size:19px;letter-spacing:-.2px}.side p,.side li{font-size:14px;color:var(--muted)}.side ul{padding-left:20px;margin-bottom:0}.term{display:block;color:var(--ink);font-weight:700}.flow{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin:24px 0}.flow span{padding:16px;background:#eaf1eb;border-radius:8px;font-size:14px;color:var(--ink);font-weight:700}.flow i{font-style:normal;color:var(--teal)}.callout{border-left:4px solid var(--teal);padding:5px 0 5px 20px;margin:28px 0}.callout p{margin:0}.table-wrap{overflow-x:auto}table{border-collapse:collapse;width:100%;font-size:14px;margin:22px 0}th,td{border-bottom:1px solid var(--line);padding:14px;text-align:left}th{background:#eaf1eb;color:var(--ink)}td{color:var(--muted)}code{font-family:Consolas,monospace;background:#e4ece6;padding:2px 5px;border-radius:3px;font-size:.9em}.quiz{max-width:780px}.quiz fieldset{border:1px solid var(--line);border-radius:14px;margin:0 0 24px;padding:24px;background:#fff}.quiz legend{font-size:17px;font-weight:700;padding:0 7px}.choice{display:flex;gap:12px;align-items:flex-start;margin:10px 0;padding:10px 12px;border-radius:8px;background:#f4f7f3;cursor:pointer;font-size:15px}.choice input{margin-top:6px;accent-color:var(--teal)}.result{padding:22px;border-radius:12px;background:#dcefe3;border:1px solid #b8d4c1;margin-top:24px}.result h2{font-size:24px;margin-bottom:10px}.result li{margin:12px 0;font-size:14px}.result[hidden]{display:none}.hint{font-size:13px;color:var(--muted)}.checklist{list-style:none;padding-left:0!important}.checklist li{display:flex;gap:14px;align-items:flex-start;border-bottom:1px solid var(--line);padding:13px 0}.checklist b{color:var(--teal);font-size:13px;min-width:24px}.short-page{min-height:65vh}.notice{margin-top:20px;font-size:13px;color:var(--muted)}
@media(max-width:800px){.hero .wrap{grid-template-columns:1fr;gap:40px}.hero{padding:48px 0}.diagram{max-width:370px;width:100%;margin:auto;min-height:280px}.orbit{width:240px;height:240px}.grid{grid-template-columns:1fr}.section-head{display:block}.section-head p{margin-top:14px}.content-grid{grid-template-columns:1fr;gap:28px}.strip{align-items:flex-start;flex-direction:column}.statbar .wrap{flex-wrap:wrap;justify-content:flex-start;gap:10px 24px}.page-head h1{font-size:35px}.card .number{margin-bottom:16px}}
@media(max-width:500px){.wrap{padding:0 20px}.topbar .wrap{min-height:100px;flex-wrap:wrap;padding-top:16px;padding-bottom:15px;gap:15px}.topbar nav{gap:24px}.hero h1{font-size:41px}.hero .intro{font-size:16px}.footer .wrap{flex-direction:column;gap:6px}.section{padding:40px 0}.card{padding:24px}.quiz fieldset{padding:18px}.node.two{right:0}.section-head h2{font-size:28px}}
.footer .page-address{display:block;margin-top:15px;margin-bottom:0;font-size:12px;line-height:1.6}.page-address strong{display:block;font-size:10px;text-transform:uppercase;letter-spacing:1.2px;color:var(--ink);margin-bottom:3px}.page-address span{display:block;overflow-wrap:anywhere;color:var(--muted)}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}