:root{color-scheme:dark;--bg:#0a0e13;--panel:#101820;--line:#26343f;--text:#e8eef5;--muted:#a3b2c1;--accent:#3ddc7a;--max:1120px}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:90px}
body{margin:0;background:radial-gradient(900px 700px at 75% -180px,rgba(61,220,122,.09),transparent 75%),var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-underline-offset:4px}
a:hover{text-decoration:none}
img{display:block;max-width:100%}
.wrap{width:min(var(--max),100% - 40px);margin-inline:auto}
.site-header{position:sticky;top:0;z-index:10;background:rgba(10,14,19,.96);border-bottom:1px solid var(--line)}
.top-nav{display:flex;align-items:center;gap:24px;min-height:66px}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);font-weight:700;text-decoration:none;white-space:nowrap}
.brand img{border-radius:7px}
.back-link{margin-left:auto;color:var(--muted);font-size:.9rem}
.button{display:inline-flex;justify-content:center;align-items:center;background:var(--accent);color:#06210f;padding:12px 20px;border-radius:10px;font-weight:700;text-decoration:none;line-height:1.4;text-align:center}
.button:hover{background:#65e995}
.button.small{font-size:.88rem;padding:10px 14px}
.skip-link{position:fixed;top:8px;left:8px;z-index:20;transform:translateY(-160%);padding:10px 20px;background:var(--accent);color:var(--bg)}
.skip-link:focus{transform:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:5px}
.breadcrumb{display:flex;gap:10px;flex-wrap:wrap;padding-top:27px;color:var(--muted);font-size:.82rem}
.breadcrumb a{color:var(--muted)}
.guide-hero{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:70px;align-items:center;padding:42px 0 60px}
.eyebrow,.step-label{color:var(--accent);font-size:.76rem;text-transform:uppercase;letter-spacing:.13em;font-weight:650}
h1,h2,h3{line-height:1.16;letter-spacing:-.025em}
h1{font-size:clamp(2.35rem,4.3vw,3.5rem);max-width:18ch;margin:18px 0 24px}
h2{font-size:clamp(1.65rem,3vw,2.1rem);margin:0 0 22px;max-width:27ch}
h3{font-size:1.1rem;letter-spacing:0;margin:0 0 12px}
p{margin:0 0 20px}
.guide-hero p:not(.eyebrow){max-width:56ch}
.intro{color:#c5d2df;font-size:1.28rem;line-height:1.55}
.guide-hero .byline{font-size:.83rem;color:var(--muted);margin-top:26px}
.text-link{font-weight:650}
.demo{margin:0;min-width:0}
.video-shell{position:relative;width:100%;aspect-ratio:9/16;border:1px solid #34453c;border-radius:18px;overflow:hidden;background:#000;box-shadow:0 22px 55px rgba(0,0,0,.3)}
.video-launch{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;text-decoration:none;color:white;background:#080d10;font:inherit;cursor:pointer;width:100%;border:0;padding:0}
.video-launch img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.65}
.video-launch::after{content:"";position:absolute;inset:0;background:linear-gradient(transparent 45%,rgba(0,0,0,.8))}
.play-mark{z-index:1;display:grid;place-items:center;background:var(--accent);color:#06210f;width:64px;height:64px;border-radius:50%;font-size:1.4rem;padding-left:4px}
.play-label{z-index:1;position:absolute;bottom:26px;font-weight:600}
.video-launch:hover .play-mark{background:#8bf2b1;transform:scale(1.05)}
.video-shell iframe{display:block;width:100%;height:100%;border:0}
figcaption{color:var(--muted);font-size:.78rem;line-height:1.55;margin-top:14px}
figcaption a{color:var(--muted)}
.article-layout{display:grid;grid-template-columns:215px minmax(0,720px);gap:65px;border-top:1px solid var(--line);padding-top:50px}
.contents nav{position:sticky;top:95px;font-size:.86rem}
.contents p{font-size:.72rem;color:var(--muted);letter-spacing:.12em;text-transform:uppercase;margin:0 0 16px}
.contents a{display:block;padding:8px 0;color:var(--muted);text-decoration:none}
.contents a:hover{color:var(--accent)}
.prose{font-size:1.07rem;min-width:0}
.prose section{padding-bottom:40px;margin-bottom:38px;border-bottom:1px solid var(--line)}
.prose section:last-of-type{border-bottom:0}
.step-label{margin-bottom:12px}
.note{padding:24px 26px;border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:0 12px 12px 0;background:var(--panel);margin:28px 0}
.note p:last-child{margin-bottom:0}
ul{padding-left:22px}
li{margin:10px 0}
.note ul{margin-top:0}
.small-note,.article-notes{font-size:.88rem;color:var(--muted)}
.connection{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:23px 26px;border:1px solid var(--line);border-radius:12px;margin:26px 0;background:linear-gradient(110deg,#14271f,var(--panel))}
.connection strong,.connection span:not(.connection-arrow){display:block}
.connection span:not(.connection-arrow){color:var(--muted);font-size:.83rem}
.connection-arrow{color:var(--accent);font-size:1.6rem}
.table-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:12px;margin:26px 0}
table{border-collapse:collapse;min-width:500px;width:100%;font-size:.91rem;line-height:1.5}
caption{text-align:left;padding:18px;color:var(--muted);background:var(--panel);font-size:.85rem}
th,td{text-align:left;padding:14px 16px;border-top:1px solid var(--line)}
thead th{background:var(--panel);font-size:.8rem;color:#bdcbd8}
tbody th{color:var(--accent);font-variant-numeric:tabular-nums}
.channels{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:26px 0}
.channels div{display:flex;align-items:center;gap:12px;padding:12px 14px;border:1px solid var(--line);border-radius:8px}
.channels dt{color:var(--accent);font-weight:700;font-family:ui-monospace,monospace}
.channels dd{margin:0;font-size:.88rem;color:var(--muted)}
details{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:18px 20px;margin-bottom:12px}
summary{cursor:pointer;font-weight:600;line-height:1.5;padding-right:8px}
details[open]{border-color:#356047}
details p{font-size:.96rem;color:#bdcbd8;margin:16px 0 0}
.support{font-size:.95rem;color:var(--muted);margin-top:26px}
.prose .finish{background:linear-gradient(150deg,#163123,var(--panel));padding:30px;border:1px solid #28573b;border-radius:16px;margin-bottom:28px}
.finish .small-note{margin:14px 0 0}
.article-notes{padding-bottom:30px}
.flight-example{display:grid;grid-template-columns:minmax(0,1fr) 240px;align-items:center;gap:28px}
@media(max-width:900px){.flight-example{grid-template-columns:1fr}.flight-example .demo{width:min(280px,100%);margin-inline:auto}}
footer{border-top:1px solid var(--line);padding:30px 0 40px;color:var(--muted);font-size:.82rem}
.footer-links{display:flex;gap:18px;flex-wrap:wrap;margin-bottom:20px}
footer p{max-width:90ch;margin:0}
@media(max-width:900px){.guide-hero{gap:32px;grid-template-columns:minmax(0,1fr) 240px}.article-layout{grid-template-columns:165px minmax(0,1fr);gap:30px}.prose{font-size:1rem}}
@media(max-width:680px){.wrap{width:calc(100% - 36px)}.top-nav{gap:12px;min-height:62px}.back-link{display:none}.top-nav .button{margin-left:auto;font-size:.75rem;padding:10px}.brand{font-size:.9rem;gap:8px}.guide-hero{grid-template-columns:1fr;padding-top:28px;gap:30px}.guide-hero h1{max-width:19ch}.intro{font-size:1.15rem}.demo{width:min(280px,100%);margin-inline:auto}.article-layout{grid-template-columns:1fr;gap:32px;padding-top:30px}.contents nav{position:static;display:grid;grid-template-columns:1fr 1fr;gap:0 16px}.contents p{grid-column:1/-1;margin-bottom:8px}.contents a{padding:8px 0}.prose section{padding-bottom:28px;margin-bottom:28px}.note{padding:20px}.connection{padding:18px 14px;gap:10px}.connection strong{font-size:.9rem}.connection span:not(.connection-arrow){font-size:.73rem}.channels{grid-template-columns:repeat(2,1fr)}.prose .finish{padding:24px}.breadcrumb{font-size:.76rem}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}