:root{--ink:#14302e;--muted:#5c6f6c;--line:#dde6e2;--bg:#f5f8f6;--card:#fff;--soft:#eef5f2;--teal:#0f6e66;--teal2:#0a5a53;--deep:#0b2f33;--deep2:#07211f;--mint:#7fe3cf;--mint2:#5ad1ba;--good:#1f8a4c;--warn:#b7791f;--bad:#c0392b;--amber:#fff6e0;--amberl:#efd79a;--r:16px;--link:#0b6b8f}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.6 -apple-system,"SF Pro Text","Segoe UI",Inter,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--link)}img,svg{max-width:100%}
h1,h2,h3{letter-spacing:-.02em;line-height:1.15;margin:0 0 10px}
h1{font-size:34px;font-weight:800}h2{font-size:25px;font-weight:800;margin-top:40px}h3{font-size:18px;font-weight:700}
p{margin:0 0 14px}
.lede{font-size:19px;color:var(--muted);margin:0 0 22px;max-width:720px}
.small{font-size:14px;color:var(--muted)}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--mint2);margin-bottom:14px}
main{max-width:1080px;margin:0 auto;padding:36px 22px 60px}
main.narrow{max-width:820px}
/* header */
.top{position:sticky;top:0;z-index:20;background:rgba(11,47,51,.92);backdrop-filter:saturate(1.4) blur(10px);-webkit-backdrop-filter:saturate(1.4) blur(10px);color:#fff}
.top .in{max-width:1080px;margin:0 auto;padding:11px 22px;display:flex;align-items:center;gap:14px}
.top .brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font-weight:800;font-size:20px;letter-spacing:-.02em;white-space:nowrap}
.top .brand svg{width:34px;height:34px;border-radius:9px;flex:none}
.top nav{margin-left:auto;display:flex;gap:2px;align-items:center;font-size:14.5px}
.top nav a{color:#d4e5e1;text-decoration:none;padding:7px 11px;border-radius:8px}.top nav a:hover{color:#fff;background:rgba(255,255,255,.09)}
.top nav a.go{background:var(--mint);color:var(--deep2);font-weight:800}.top nav a.go:hover{background:var(--mint2)}
.top .dd{position:relative}
.top .ddb{background:none;border:0;color:#d4e5e1;font:inherit;padding:7px 11px;border-radius:8px;cursor:pointer}
.top .ddb::after{content:"";display:inline-block;width:6px;height:6px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg);margin-left:8px;position:relative;top:-3px}
.top .ddb:hover,.top .dd:focus-within .ddb,.top .dd.on .ddb{color:#fff;background:rgba(255,255,255,.09)}
.top .ddm{display:none;position:absolute;top:100%;left:0;min-width:270px;background:#0b2f33;border:1px solid rgba(255,255,255,.12);border-radius:12px;padding:8px;box-shadow:0 14px 30px rgba(0,0,0,.35);flex-direction:column}
.top .dd:hover .ddm,.top .dd:focus-within .ddm,.top .dd.on .ddm{display:flex}
.top .ddm a{display:block;padding:9px 12px;white-space:nowrap}.top .ddm a small{display:block;color:#8fb3ad;font-size:12.5px;white-space:normal}
.top .mnu{display:none}
@media (max-width:860px){
.top .in{padding:10px 16px;gap:10px}
.top nav a:not(.go){display:none}.top nav .dd{display:none}
.top nav a.go{white-space:nowrap;font-size:13.5px;padding:7px 10px}
.top.open .ddm a{white-space:normal}
.top .mnu{display:flex;flex-direction:column;justify-content:center;gap:4px;order:3;width:40px;height:38px;padding:0 10px;border:0;border-radius:9px;background:rgba(255,255,255,.1);cursor:pointer}
.top .mnu span{display:block;height:2px;background:#fff;border-radius:2px;transition:transform .2s,opacity .2s}
.top.open .mnu span:nth-child(1){transform:translateY(6px) rotate(45deg)}.top.open .mnu span:nth-child(2){opacity:0}.top.open .mnu span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.top.open .in{flex-wrap:wrap}.top.open .mnu{margin-left:auto}
.top.open nav{order:4;width:100%;flex-direction:column;align-items:stretch;gap:2px;margin:6px 0 4px;max-height:calc(100vh - 70px);overflow:auto}
.top.open nav a:not(.go){display:block;font-size:16px;padding:10px 8px;border-top:1px solid rgba(255,255,255,.08);text-align:left}
.top.open nav a.go{order:-1;text-align:center;margin-bottom:6px}
.top.open nav .dd{display:block;width:100%}.top.open .ddb{display:block;width:100%;text-align:left;font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:#8fb3ad;padding:14px 8px 4px}
.top.open .ddb::after{display:none}.top.open .ddm{display:flex;position:static;background:none;border:0;box-shadow:none;padding:0;min-width:0}
}
/* hero */
.hero{position:relative;overflow:hidden;color:#fff;padding:64px 22px 70px;background:radial-gradient(900px 520px at 80% 8%,rgba(127,227,207,.28),transparent 60%),radial-gradient(700px 400px at 8% 95%,rgba(127,227,207,.10),transparent 60%),linear-gradient(180deg,#0f3d42,#0b2f33 60%,#07211f)}
.hero:before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);background-size:48px 48px;mask-image:radial-gradient(70% 60% at 50% 40%,#000 30%,transparent 100%);-webkit-mask-image:radial-gradient(70% 60% at 50% 40%,#000 30%,transparent 100%)}
.hero .in{position:relative;max-width:1080px;margin:0 auto}
.hero h1{font-size:52px;max-width:800px;margin-bottom:16px;line-height:1.05}.hero h1 em{font-style:normal;color:var(--mint)}
.hero p.sub{font-size:20px;color:#cfe3de;max-width:640px;margin:0 0 26px}
.hero .crumb{font-size:14px;color:#9fc4bd;margin-bottom:18px}.hero .crumb a{color:#9fc4bd}
.hero.two .in{display:grid;grid-template-columns:1.15fr .95fr;gap:40px;align-items:center}
.hero.compact{padding:44px 22px 48px}.hero.compact h1{font-size:40px}
.btns{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin-bottom:22px}
.btn{font:inherit;font-weight:800;font-size:17px;background:var(--teal);color:#fff;border:0;border-radius:12px;padding:13px 22px;cursor:pointer;text-decoration:none;display:inline-block;box-shadow:0 8px 24px rgba(15,110,102,.25);line-height:1.3}
.btn:hover{background:var(--teal2)}
.hero .btn,.dark .btn,.cta .btn{background:var(--mint);color:var(--deep2);box-shadow:0 8px 24px rgba(127,227,207,.25)}.hero .btn:hover,.dark .btn:hover,.cta .btn:hover{background:var(--mint2)}
.btn.ghost{background:rgba(255,255,255,.08)!important;color:#fff!important;box-shadow:none;border:1px solid rgba(255,255,255,.22)}.btn.ghost:hover{background:rgba(255,255,255,.14)!important}
.btn.alt{background:transparent;color:var(--teal);box-shadow:none;border:2px solid var(--teal)}.btn.alt:hover{background:var(--soft)}
.btn.sm{font-size:15px;padding:9px 16px;border-radius:10px}
.trust{font-size:14px;color:#9fc4bd;margin:0}
.why{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);border-radius:14px;padding:12px 16px;font-size:15px;color:#cfe3de;max-width:600px}.why b{color:#fff}
ul.ticks{list-style:none;padding:0;margin:0 0 24px;display:grid;gap:8px;font-size:17px;font-weight:600}
ul.ticks li{display:flex;gap:10px;align-items:flex-start}ul.ticks svg{flex:none;margin-top:3px}
/* stat cards */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:-36px auto 10px;max-width:1080px;padding:0 22px;position:relative;z-index:2}
.stats.three{grid-template-columns:repeat(3,1fr)}
.stat{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px 18px 16px;box-shadow:0 10px 30px rgba(11,47,51,.08)}
.stat b{display:block;font-size:34px;line-height:1;letter-spacing:-.03em;color:var(--deep)}.stat b.o{color:var(--teal)}.stat span{font-size:14.5px;color:var(--muted);display:block;margin-top:6px}
.stat small{display:block;font-size:12.5px;color:var(--muted);margin-top:4px}
/* sections */
section.band{padding:56px 22px}section.band .in{max-width:1080px;margin:0 auto}
section.band.light{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
section.band.dark{background:linear-gradient(180deg,#0b2f33,#07211f);color:#fff}section.band.dark h2,section.band.dark h3{color:#fff}section.band.dark p{color:#cfe3de}section.band.dark a{color:var(--mint)}
.center{text-align:center}.center .lede{margin-left:auto;margin-right:auto}
.feat{display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));gap:16px;margin-top:22px}
.feat .f{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px 22px 20px;box-shadow:0 1px 2px rgba(11,47,51,.04);position:relative}
.feat .f b{display:block;font-size:17px;margin-bottom:6px}.feat .f p{margin:0;color:var(--muted);font-size:15.5px}
.feat .f .n{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:10px;background:var(--soft);color:var(--teal);font-weight:800;font-size:15px;margin-bottom:12px}
.feat .f .n svg{width:20px;height:20px}
.feat a.f{text-decoration:none;color:var(--ink);transition:transform .12s,box-shadow .12s}.feat a.f:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(11,47,51,.10)}
.split{display:grid;grid-template-columns:1fr 1.15fr;gap:34px;align-items:center;margin-top:40px}
.split.flip .txt{order:2}
.split .shot{border-radius:14px;border:1px solid var(--line);box-shadow:0 20px 50px rgba(11,47,51,.14);overflow:hidden;background:#fff}
.split .shot img{display:block;width:100%;height:auto}
.split h3{font-size:24px;font-weight:800;margin-bottom:8px}.split p{color:var(--muted);margin:0 0 10px}
.data{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px;margin-top:22px}
.data a{display:block;text-decoration:none;color:var(--ink);background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:20px 20px 18px;transition:transform .12s,box-shadow .12s}
.data a:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(11,47,51,.10)}
.data a b{display:block;font-size:30px;font-weight:800;letter-spacing:-.02em;color:var(--deep)}.data a span{display:block;font-weight:700;margin:2px 0 4px}.data a small{color:var(--muted);font-size:14px}
/* answer, cards, tables */
.answer{position:relative;border-left:6px solid var(--teal);background:var(--card);border-radius:14px;padding:18px 20px;margin:18px 0 22px;box-shadow:0 8px 30px rgba(11,47,51,.07)}
.answer .big{font-size:22px;font-weight:800;margin:0 0 6px;letter-spacing:-.01em}
.answer.warn{border-color:var(--warn)}.answer.bad{border-color:var(--bad)}.answer.good{border-color:var(--good)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:18px 22px;margin:14px 0}
.status{background:var(--amber);border:1px solid var(--amberl);border-radius:14px;padding:16px 18px;margin:20px 0;font-size:16px}
.status b,.status strong{color:#5c4400}
.note{background:var(--soft);border:1px solid #cfe1da;border-radius:14px;padding:14px 18px;margin:16px 0;font-size:15.5px}
.kv{display:grid;grid-template-columns:200px 1fr;gap:8px 14px;font-size:16px}.kv b{color:var(--muted);font-weight:600}
.tbl{width:100%;border-collapse:collapse;background:var(--card);border:1px solid var(--line);border-radius:12px;overflow:hidden;font-size:15.5px}
.tbl th,.tbl td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top}
.tbl th{background:#eef3f1;font-size:12.5px;letter-spacing:.04em;text-transform:uppercase;color:var(--muted)}
.tbl tr:last-child td{border-bottom:0}.tbl td.num,.tbl th.num{text-align:right;white-space:nowrap;font-variant-numeric:tabular-nums}
.wrap{overflow-x:auto;margin:0 -4px;padding:0 4px}
.tag{display:inline-block;font-size:11.5px;font-weight:700;border-radius:999px;padding:2px 9px;margin-left:6px;vertical-align:middle;background:var(--soft);color:var(--teal)}
.tag.must{background:#e6f5ec;color:var(--good)}.tag.ask{background:#fff3df;color:var(--warn)}.tag.you{background:#eef0f4;color:var(--muted)}.tag.spec{background:#ede9fb;color:#5b45b0}
.pill{display:inline-block;font-size:12.5px;font-weight:800;letter-spacing:.04em;text-transform:uppercase;border-radius:999px;padding:3px 10px;background:var(--soft);color:var(--teal)}
.meta{font-size:14px;color:var(--muted);margin:0 0 18px}
.srcs{font-size:14px;color:var(--muted);background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px 16px;margin:24px 0}.srcs ol{margin:6px 0 0;padding-left:20px}.srcs li{margin:3px 0}
.notfor{border-left:4px solid var(--warn);padding:4px 0 4px 14px;color:var(--muted);font-size:15.5px;margin:18px 0}
.prose h2{margin-top:36px}.prose ul,.prose ol{padding-left:22px;margin:0 0 16px}.prose li{margin:5px 0}
.prose img{border-radius:12px;border:1px solid var(--line)}
/* timeline */
.tl{list-style:none;padding:0;margin:22px 0;display:grid;grid-template-columns:repeat(5,1fr);gap:12px;counter-reset:s}
.tl li{position:relative;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px 14px 14px;counter-increment:s}
.tl li:before{content:counter(s);display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:50%;background:var(--teal);color:#fff;font-weight:800;font-size:14px;margin-bottom:10px}
.tl li b{display:block;font-size:15.5px;margin-bottom:4px}.tl li span{font-size:14px;color:var(--muted);display:block}.tl li em{display:block;font-style:normal;font-size:12.5px;color:var(--teal);font-weight:700;margin-top:8px}
.dark .tl li{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.14)}.dark .tl li span{color:#cfe3de}.dark .tl li:before{background:var(--mint);color:var(--deep2)}.dark .tl li em{color:var(--mint)}
/* charts */
.chart{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:18px 20px;margin:18px 0}
.chart h3{margin-bottom:2px}.chart .small{margin-bottom:10px;display:block}
.chart svg{width:100%;height:auto;display:block}
.chart details{margin-top:10px;font-size:14px}.chart summary{cursor:pointer;color:var(--muted)}
.legend{display:flex;flex-wrap:wrap;gap:6px 16px;font-size:13.5px;color:var(--muted);margin:8px 0 2px}.legend i{display:inline-block;width:11px;height:11px;border-radius:3px;margin-right:6px;vertical-align:-1px}
/* sample change log */
.log{background:#fff;border-radius:16px;box-shadow:0 24px 60px rgba(0,0,0,.35);overflow:hidden;color:var(--ink);border:1px solid rgba(255,255,255,.14)}
.log .bar{height:36px;background:#eef3f1;display:flex;align-items:center;gap:6px;padding:0 14px;border-bottom:1px solid var(--line)}
.log .bar i{width:11px;height:11px;border-radius:50%;background:#cfd9d5;display:block}.log .bar span{margin-left:10px;font-size:12px;color:#7d8f8b;background:#fff;border-radius:6px;padding:3px 10px;flex:1}
.log .e{display:grid;grid-template-columns:92px 1fr;gap:12px;padding:12px 16px;border-bottom:1px solid var(--line);font-size:14px;align-items:start}
.log .e:last-child{border-bottom:0}.log .d{font-weight:800;color:var(--teal);font-size:13px;line-height:1.3}.log .d small{display:block;font-weight:600;color:var(--muted)}
.log .e b{display:block;font-size:14.5px}.log .e span{color:var(--muted)}
.log .t{display:inline-block;font-size:11px;font-weight:800;border-radius:999px;padding:1px 8px;margin-left:6px;vertical-align:1px}.log .t.date{background:#fff3df;color:var(--warn)}.log .t.text{background:#fde8e6;color:var(--bad)}.log .t.none{background:#e6f5ec;color:var(--good)}
/* cta + footer */
.cta{background:radial-gradient(600px 300px at 90% 0%,rgba(127,227,207,.30),transparent 60%),var(--deep);color:#fff;border-radius:var(--r);padding:26px 28px;margin:40px 0 10px;display:flex;gap:20px;align-items:center;flex-wrap:wrap}
.cta svg{width:58px;height:58px;border-radius:14px;flex:none}
.cta .t{flex:1;min-width:240px}.cta .t b{font-size:20px;display:block;margin-bottom:4px}.cta .t span{color:#cfe3de;font-size:15px}
footer{max-width:1080px;margin:0 auto;padding:22px;font-size:14px;color:var(--muted);border-top:1px solid var(--line)}
footer a{color:var(--muted)}footer .cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px 22px;margin-bottom:14px}footer .cols b{display:block;color:var(--ink);margin-bottom:4px}footer .cols a{display:block;text-decoration:none;padding:2px 0}
/* forms + tools */
fieldset{border:1px solid var(--line);border-radius:14px;padding:16px 18px;margin:0 0 14px;background:var(--card)}
legend{font-weight:800;padding:0 8px;font-size:16px}
.opt{display:flex;gap:10px;align-items:flex-start;margin:8px 0;cursor:pointer;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:var(--bg)}
.opt:has(input:checked){border-color:var(--teal);background:var(--soft)}
.opt input{margin:4px 0 0;accent-color:var(--teal)}.opt span{font-size:15.5px}.opt small{display:block;color:var(--muted);font-size:13.5px}
input[type=date],input[type=email],input[type=text]{font:inherit;padding:9px 11px;border:1px solid var(--line);border-radius:10px;background:var(--bg);color:var(--ink);max-width:100%}
input:focus{outline:none;border-color:var(--teal);box-shadow:0 0 0 4px rgba(15,110,102,.15)}
.item{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px 14px;margin:8px 0;display:flex;gap:12px;align-items:flex-start}
.item input[type=checkbox]{margin-top:5px;width:18px;height:18px;accent-color:var(--teal);flex:none}.item .t{flex:1;min-width:0}.item .t b{display:block}
.item.flag{border-left:5px solid var(--bad)}.item.okk{border-left:5px solid var(--good)}.item.unk{border-left:5px solid var(--warn)}
.item.done{opacity:.6}.item.done .t b{text-decoration:line-through}
.ring{display:grid;grid-template-columns:150px 1fr;gap:20px;align-items:center;background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:18px 22px;margin:18px 0}
.ring svg{width:150px;height:150px}.ring circle.v{transition:stroke-dashoffset .8s cubic-bezier(.2,.8,.2,1)}
.ring .n{font-size:34px;font-weight:800;letter-spacing:-.03em;line-height:1}.ring .n small{font-size:15px;color:var(--muted);font-weight:600;letter-spacing:0}
.ring b.h{display:block;font-size:19px;margin-bottom:4px}.ring p{margin:0;color:var(--muted);font-size:15px}
.segs{display:flex;gap:4px;height:10px;border-radius:99px;overflow:hidden;background:var(--line);margin:10px 0 4px}.segs i{display:block;height:100%}
.steps{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 18px;font-size:13.5px}.steps span{padding:5px 11px;border-radius:999px;background:var(--card);border:1px solid var(--line);color:var(--muted)}.steps span.on{background:var(--teal);color:#fff;border-color:var(--teal);font-weight:700}
.resh{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;margin:26px 0 8px}.resh h2{margin:0}
button.btn{line-height:1.3}
.copy{font:13.5px/1.5 ui-monospace,SFMono-Regular,Menlo,monospace;background:#0b2f33;color:#d4e5e1;border-radius:12px;padding:14px 16px;overflow:auto;white-space:pre-wrap;word-break:break-all}
.emb{border:1px solid var(--line);border-radius:14px;overflow:hidden;background:#fff}
/* responsive */
@media (max-width:900px){.stats{grid-template-columns:repeat(2,1fr)}.stats.three{grid-template-columns:repeat(3,1fr)}.tl{grid-template-columns:repeat(2,1fr)}.hero.two .in{grid-template-columns:1fr}}
@media (max-width:760px){.kv{grid-template-columns:1fr}.hero h1{font-size:36px}.hero.compact h1{font-size:30px}h1{font-size:28px}h2{font-size:22px}.hero{padding:40px 16px 54px}main{padding:28px 16px 50px}section.band{padding:40px 16px}.split{grid-template-columns:1fr}.split.flip .txt{order:0}.stats{padding:0 16px;gap:10px}.stats.three{grid-template-columns:1fr 1fr}.stat b{font-size:28px}.stat{padding:14px}.ring{grid-template-columns:1fr;text-align:center;justify-items:center}.tl{grid-template-columns:1fr}.lede{font-size:17px}footer{padding:22px 16px}.cta{padding:20px}}
@media (max-width:420px){.stats{grid-template-columns:1fr 1fr}.btn{width:100%;text-align:center}}
/* print */
@media print{.top,footer,.cta,.no-print,.btns,.btn,form,.steps{display:none!important}body{background:#fff;color:#000;font-size:12pt}main{padding:0;max-width:none}.hero{background:none;color:#000;padding:0 0 10px}.hero h1{color:#000;font-size:24pt}.hero p.sub{color:#333}.hero:before{display:none}.stats{margin:10px 0}.stat,.item,.card,.chart,.ring{box-shadow:none;break-inside:avoid}.print-only{display:block!important}a{color:#000;text-decoration:none}.answer{box-shadow:none}}
.print-only{display:none}