:root{color-scheme:light;--ink:#172338;--muted:#58677a;--line:#d9e0e5;--paper:#f6f8f7;--white:#fff;--navy:#102335;--mint:#b9f27c;--blue:#257b97;--amber:#f1b85c;--shadow:0 20px 50px rgba(16,35,53,.08)}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font:400 17px/1.62 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
a{color:inherit;text-decoration-thickness:1px;text-underline-offset:.18em}
button,input{font:inherit}
button{cursor:pointer}
code,pre,.mono,.eyebrow,.nav-links,.button,.tag,.crumb,.fact-label,.mini-nav{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
code{font-size:.91em;background:#e8eef0;border-radius:.28rem;padding:.1em .28em}
pre code{background:none;padding:0;color:inherit;font-size:inherit}
pre{margin:0;white-space:pre-wrap;overflow-wrap:anywhere}
::selection{background:var(--mint);color:var(--navy)}
:focus-visible{outline:3px solid #237f91;outline-offset:4px;border-radius:4px}
.skip{position:absolute;left:1rem;top:-4rem;padding:.6rem 1rem;background:var(--mint);z-index:99}.skip:focus{top:1rem}
.shell{width:min(1180px,calc(100% - 48px));margin-inline:auto}
.site-header{background:var(--navy);color:#edf5f5;position:relative;z-index:10;border-bottom:1px solid rgba(255,255,255,.16)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:2rem;min-height:78px}
.brand{display:inline-flex;align-items:center;gap:.75rem;text-decoration:none;font-weight:800;letter-spacing:-.035em;font-size:1.28rem;white-space:nowrap}
.brand-mark{display:grid;place-items:center;width:38px;height:38px;border-radius:11px;color:var(--navy);background:var(--mint);font:800 1.05rem/1 ui-monospace,monospace;letter-spacing:-.1em}
.nav-links{display:flex;align-items:center;gap:1.55rem;font-size:.83rem;letter-spacing:.02em}
.nav-links a{color:#bfd0d5;text-decoration:none;white-space:nowrap}.nav-links a:hover,.nav-links a[aria-current=page]{color:var(--mint)}
.top-band{background:var(--navy);color:#f7faf7;position:relative;overflow:hidden}
.top-band:before{content:"";position:absolute;inset:auto -15% -240px 30%;height:460px;background:radial-gradient(ellipse,rgba(96,176,178,.15),transparent 65%);pointer-events:none}
.hero{display:grid;grid-template-columns:1.04fr .96fr;align-items:center;gap:3rem;padding-block:92px 94px;min-height:535px}
.eyebrow{display:inline-flex;align-items:center;gap:.6rem;color:var(--blue);text-transform:uppercase;letter-spacing:.12em;font-size:.75rem;font-weight:700}
.eyebrow:before{content:"";width:8px;height:8px;border-radius:50%;background:currentColor}
.top-band .eyebrow{color:var(--mint)}
h1,h2,h3,p{margin-top:0}
h1,h2,h3{letter-spacing:-.048em;line-height:1.12}
h1{font-size:clamp(3rem,6.1vw,5.8rem);margin:.95rem 0 1.3rem;font-weight:780}
h2{font-size:clamp(2rem,3.5vw,3.35rem);margin:.65rem 0 1.1rem}
h3{font-size:1.35rem;margin:0 0 .6rem}
.lead{font-size:1.16rem;line-height:1.6;max-width:39rem;color:#c3d2d8;margin-bottom:1.8rem}
.hero-actions{display:flex;flex-wrap:wrap;gap:.85rem}
.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:.72rem 1.2rem;border-radius:8px;text-decoration:none;font-weight:700;font-size:.83rem;border:1px solid transparent;line-height:1.2}
.button-primary{background:var(--mint);color:var(--navy)}.button-primary:hover{background:#d0ff9f}
.button-ghost{border-color:#76919c;color:#e8f2f3}.button-ghost:hover{border-color:var(--mint);color:var(--mint)}
.branch-panel{border:1px solid #3e6171;background:linear-gradient(135deg,#173649,#0d2332);border-radius:20px;padding:1.25rem;box-shadow:0 25px 70px rgba(0,0,0,.23);transform:rotate(1.5deg)}
.panel-bar{display:flex;align-items:center;gap:.48rem;padding:.2rem .35rem 1rem;border-bottom:1px solid #365269;color:#b3cad3;font:.73rem ui-monospace,monospace}.panel-bar span:first-child,.panel-bar span:nth-child(2),.panel-bar span:nth-child(3){width:9px;height:9px;border-radius:50%;background:#5a8592}.panel-bar span:nth-child(2){background:var(--amber)}.panel-bar span:nth-child(3){background:var(--mint)}.panel-bar em{font-style:normal;margin-left:auto}
.branch-graphic{display:block;width:100%;height:auto;margin:1rem auto .1rem}
.graphic-caption{font:.74rem ui-monospace,monospace;color:#9cb7c2;padding:.4rem .35rem}
.section{padding-block:82px}
.section-tight{padding-block:58px}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:2rem;margin-bottom:2rem}.section-head p{max-width:36rem;color:var(--muted);margin:0}
.muted{color:var(--muted)}.intro{max-width:720px;color:var(--muted);font-size:1.1rem}
.kicker{color:var(--blue);font:.75rem ui-monospace,monospace;text-transform:uppercase;letter-spacing:.12em;font-weight:700}
.grid{display:grid;gap:1.2rem}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.card{background:var(--white);border:1px solid var(--line);border-radius:14px;padding:1.6rem;box-shadow:0 5px 20px rgba(16,35,53,.025)}
.card:hover{border-color:#aabdc5}.card .number{color:var(--blue);font:.75rem ui-monospace,monospace;letter-spacing:.08em;display:block;margin-bottom:1.7rem}
.card p{color:var(--muted);margin:0 0 1.4rem}.card a{font-weight:700;color:#13647e}
.stripe{height:5px;width:36px;background:var(--mint);border-radius:10px;margin-bottom:1.3rem}.stripe.blue{background:#83c7d8}.stripe.amber{background:var(--amber)}
.feature-band{background:#e9f0ef;border-block:1px solid #d7e1e0}.feature-grid{display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:center}.feature-grid p{color:var(--muted)}
.code-window{background:#102637;color:#eaf4f2;border:1px solid #406071;border-radius:12px;box-shadow:var(--shadow);overflow:hidden}.code-window .bar{background:#173348;border-bottom:1px solid #355468;color:#a6bec8;padding:.75rem 1rem;font:.75rem ui-monospace,monospace}.code-window pre{padding:1.3rem 1.5rem;font: .92rem/1.9 ui-monospace,monospace}.code-window .comment{color:#8daeb9}.code-window .prompt{color:var(--mint)}
.page-hero{padding-block:68px 72px}.page-hero h1{font-size:clamp(2.9rem,5.5vw,5rem);max-width:850px}.page-hero p{max-width:720px}.crumb{font-size:.76rem;color:#a2bac4}.crumb a{color:var(--mint)}
.prose{max-width:760px}.prose p{color:var(--muted)}
.info-box{padding:1.25rem 1.4rem;border-left:4px solid #4098ab;background:#e5eff0;border-radius:0 10px 10px 0;margin:1.8rem 0}.info-box p{margin:0;color:#2b4959}
.model-card{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden}.model-diagram{height:180px;display:grid;place-items:center;background:#e7f0ef;border-bottom:1px solid var(--line)}.model-diagram svg{width:min(100%,350px);height:142px}.model-body{padding:1.6rem}.model-body p{color:var(--muted);margin-bottom:1rem}.model-body ul{padding-left:1.2rem;margin:0;color:var(--muted)}
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:14px;background:#fff}.compare{border-collapse:collapse;width:100%;min-width:680px;text-align:left}.compare th,.compare td{padding:1rem 1.2rem;border-bottom:1px solid var(--line);vertical-align:top}.compare th{background:#e9f0ef;font:.77rem ui-monospace,monospace;text-transform:uppercase;letter-spacing:.07em}.compare tr:last-child td{border-bottom:0}.compare td:first-child{font-weight:750}
.system-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1.2rem}.system{padding:1.7rem;background:#fff;border:1px solid var(--line);border-radius:15px}.system-head{display:flex;align-items:center;justify-content:space-between;gap:1rem;margin-bottom:1.2rem}.system-head h3{margin:0}.tag{border:1px solid #b5c9d0;border-radius:30px;color:#32677a;font-size:.73rem;padding:.22rem .6rem;white-space:nowrap}.system p{color:var(--muted)}.system ul{margin:0 0 1.2rem;padding-left:1.15rem}.system li{padding:.12rem 0}.system a{color:#13647e;font-weight:700}
.timeline{position:relative;max-width:850px;margin-top:2rem}.timeline:before{content:"";position:absolute;left:55px;top:8px;bottom:20px;width:2px;background:#b7c9ce}.event{display:grid;grid-template-columns:112px 1fr;gap:1rem;padding-bottom:2rem}.event .year{position:relative;font:700 .85rem ui-monospace,monospace;color:#146d84;padding-top:.18rem}.event .year:after{content:"";position:absolute;left:50px;top:9px;width:11px;height:11px;border:3px solid var(--paper);border-radius:50%;background:#26869a}.event h3{margin:0 0 .35rem}.event p{color:var(--muted);margin:0}
.command-controls{display:flex;gap:.75rem;align-items:center;flex-wrap:wrap;margin-bottom:1.5rem}.search{width:min(100%,440px);border:1px solid #aebec5;border-radius:9px;padding:.8rem 1rem;background:#fff;color:var(--ink)}.search:focus{outline:3px solid #92d5df;outline-offset:1px}.count{color:var(--muted);font:.78rem ui-monospace,monospace}.mini-nav{display:flex;flex-wrap:wrap;gap:.5rem;margin-bottom:2rem}.mini-nav a{border:1px solid #bed0d5;border-radius:30px;padding:.35rem .65rem;text-decoration:none;font-size:.74rem;color:#2a687a}.mini-nav a:hover{background:#e2eeee}
.command-group{margin:2.2rem 0 3.4rem}.command-group h2{font-size:1.8rem;margin-bottom:.35rem}.command-group>p{color:var(--muted)}.command-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.9rem}.command{background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden}.command-top{display:flex;gap:.5rem;align-items:start;justify-content:space-between;background:#122a3a;color:#eaf7f5;padding:.85rem 1rem}.command-top code{background:none;color:inherit;font-size:.83rem;overflow-wrap:anywhere;min-width:0}.copy{flex:none;background:#254655;color:#dcebea;border:1px solid #4a7180;border-radius:5px;font:.7rem ui-monospace,monospace;padding:.3rem .55rem}.copy:hover{background:#386375}.command p{font-size:.91rem;color:var(--muted);margin:.8rem 1rem 1rem}.command[hidden],.command-group[hidden]{display:none}
.sources{background:#e9f0ef;border-block:1px solid #d4e1e2}.source-links{display:flex;flex-wrap:wrap;gap:.7rem}.source-links a{border:1px solid #b2c8ce;border-radius:7px;padding:.5rem .8rem;text-decoration:none;background:#fff;font-size:.85rem;color:#205d71}.source-links a:hover{border-color:#4d99aa}
.site-footer{background:#0e2232;color:#b8cbd1;padding:2.5rem 0}.footer-inner{display:flex;justify-content:space-between;gap:2rem;align-items:start}.site-footer a{color:#d8f0e2}.site-footer p{font-size:.9rem;margin:.4rem 0 0}.footer-nav{display:flex;gap:1.2rem;flex-wrap:wrap;font:.78rem ui-monospace,monospace}
@media(max-width:900px){.header-inner{display:block;padding-block:1rem}.nav-links{overflow-x:auto;padding:.7rem 0 .25rem}.hero{grid-template-columns:1fr;padding-block:65px}.branch-panel{max-width:620px;transform:none}.grid-3{grid-template-columns:1fr 1fr}.feature-grid{grid-template-columns:1fr;gap:1.5rem}.system-grid{grid-template-columns:1fr}}
@media(max-width:640px){body{font-size:16px}.shell{width:min(100% - 32px,1180px)}.hero{gap:2.5rem;min-height:unset}.lead{font-size:1.04rem}.section{padding-block:60px}.section-tight{padding-block:46px}.section-head{display:block}.grid-3,.grid-2,.command-list{grid-template-columns:1fr}.page-hero{padding-block:48px 52px}.model-diagram{height:150px}.timeline:before{left:42px}.event{grid-template-columns:85px 1fr}.event .year:after{left:37px}.footer-inner{display:block}.footer-nav{margin-top:1.3rem}.button{width:100%}.hero-actions{display:grid}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}