:root{--teal:#12b5b0;--teal2:#0b8f97;--deep:#0f4a6e;--navy:#0a2f55;--navy2:#071f3a;--sky:#8fd3f4;--orange:#f08a24;
--ink:#14233a;--mut:#53647c;--bg:#f5f8fc;--card:#fff;--line:#dce5ee;--tint:rgba(18,181,176,.10);--shadow:0 1px 2px rgba(10,47,85,.06),0 8px 24px rgba(10,47,85,.07);--link:#0a7d92}
@media (prefers-color-scheme:dark){:root{--ink:#e7eff9;--mut:#a5b7cc;--bg:#08172a;--card:#0e2540;--line:#1d3a5a;--tint:rgba(18,181,176,.14);--shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.25);--link:#7fd0ee}}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:80px}
body{margin:0;font:17px/1.65 Inter,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased}
h1,h2,h3{letter-spacing:-.02em;line-height:1.15;margin:0}
a{color:var(--link);text-underline-offset:3px}a:hover{text-decoration-thickness:2px}
:focus-visible{outline:3px solid var(--orange);outline-offset:3px;border-radius:6px}
.skip{position:absolute;left:-999px}.skip:focus{left:12px;top:12px;background:#fff;color:#000;padding:8px 12px;z-index:50;border-radius:8px}
.wrap{max-width:1080px;margin:0 auto;padding:0 24px}
/* nav */
header.nav{background:rgba(7,31,58,.92);backdrop-filter:saturate(1.4) blur(10px);position:sticky;top:0;z-index:20;border-bottom:1px solid rgba(143,211,244,.14)}
header.nav .wrap{display:flex;align-items:center;gap:22px;height:64px}
.brand{display:flex;align-items:center;gap:11px;color:#fff;text-decoration:none;font-weight:750;font-size:21px;letter-spacing:-.02em}
.brand img{width:36px;height:36px;display:block}
nav{margin-left:auto;display:flex;gap:2px;align-items:center}
nav a{color:#c5dcec;text-decoration:none;padding:7px 13px;border-radius:9px;font-size:15px;font-weight:550;transition:background .15s,color .15s}
nav a:hover{background:rgba(255,255,255,.1);color:#fff}nav a.on{color:#fff;background:rgba(18,181,176,.22)}
nav a.gh{margin-left:8px;border:1px solid rgba(143,211,244,.35);color:#e8f5fc}
/* buttons */
.btn{display:inline-flex;align-items:center;gap:9px;padding:13px 24px;border-radius:11px;font-weight:650;font-size:16.5px;text-decoration:none;transition:transform .15s,box-shadow .15s,background .15s}
.btn.p{background:var(--teal);color:#04263d;box-shadow:0 6px 18px rgba(18,181,176,.35)}.btn.p:hover{background:#25cbc6;transform:translateY(-1px)}
.btn.s{border:1.5px solid rgba(255,255,255,.4);color:#fff}.btn.s:hover{background:rgba(255,255,255,.1)}
.btn.o{border:1.5px solid var(--line);color:var(--ink);background:var(--card)}.btn.o:hover{border-color:var(--teal)}
.btn svg{width:19px;height:19px}
.btns{display:flex;gap:12px;flex-wrap:wrap}
/* hero */
.hero{position:relative;background:radial-gradient(900px 420px at 82% 30%,rgba(18,181,176,.28),transparent 70%),linear-gradient(180deg,var(--navy2),var(--navy) 55%,var(--deep));color:#fff;overflow:hidden}
.hero:before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(143,211,244,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(143,211,244,.07) 1px,transparent 1px);background-size:44px 44px;mask-image:linear-gradient(180deg,#000 30%,transparent);-webkit-mask-image:linear-gradient(180deg,#000 30%,transparent)}
.hero .wrap{position:relative;display:grid;grid-template-columns:1.02fr 1fr;gap:48px;align-items:center;padding-top:76px;padding-bottom:84px}
.badge{display:inline-flex;gap:8px;align-items:center;font-size:13.5px;font-weight:600;color:#bfe6f7;background:rgba(143,211,244,.12);border:1px solid rgba(143,211,244,.25);padding:5px 13px;border-radius:99px;margin-bottom:22px}
.badge i{width:8px;height:8px;border-radius:50%;background:var(--teal);display:block}
.hero h1{font-size:clamp(36px,5.2vw,56px);margin-bottom:20px;font-weight:780}
.hero h1 em{font-style:normal;background:linear-gradient(90deg,#42e0da,#8fd3f4);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lede{color:#cfe3f1;font-size:19.5px;margin:0 0 30px;max-width:540px}
.hero .fine{margin-top:18px;font-size:14.5px;color:#9fc3da}
figure.shot{margin:0}.shot .frame{border-radius:20px;overflow:hidden;border:1px solid rgba(143,211,244,.28);box-shadow:0 30px 70px rgba(0,0,0,.45),0 0 0 8px rgba(255,255,255,.04)}
.shot img{display:block;width:100%;height:auto}.shot figcaption{font-size:13.5px;color:#9fc3da;margin-top:14px;text-align:center}
/* sections */
section{padding:76px 0}section.tight{padding:48px 0}
.eyebrow{font-size:13px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--teal2);margin-bottom:10px}
@media (prefers-color-scheme:dark){.eyebrow{color:var(--teal)}}
h2{font-size:clamp(28px,3.6vw,38px);font-weight:760}
.lead{color:var(--mut);font-size:18.5px;margin:12px 0 0;max-width:680px}
.head{margin-bottom:38px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(290px,1fr));gap:20px}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:26px;box-shadow:var(--shadow);transition:transform .18s,border-color .18s}
a.card{text-decoration:none;color:inherit;display:block}.card:hover{transform:translateY(-2px);border-color:rgba(18,181,176,.55)}
.card h3{font-size:19.5px;margin:16px 0 8px;font-weight:700}.card p{margin:0;color:var(--mut);font-size:16px;line-height:1.6}
.ico{width:46px;height:46px;border-radius:12px;background:linear-gradient(135deg,rgba(18,181,176,.2),rgba(143,211,244,.28));display:grid;place-items:center;color:var(--teal2)}
.ico svg{width:25px;height:25px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
@media (prefers-color-scheme:dark){.ico{color:var(--sky)}}
.tag{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--teal2)}
/* split blocks */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split img{width:100%;height:auto;border-radius:18px;display:block;box-shadow:var(--shadow);border:1px solid var(--line)}
.checks{list-style:none;padding:0;margin:22px 0 28px}.checks li{position:relative;padding-left:32px;margin:11px 0;color:var(--ink)}
.checks li:before{content:"";position:absolute;left:0;top:5px;width:20px;height:20px;border-radius:50%;background:var(--tint) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M5.5 10.5l3 3 6-6.5' fill='none' stroke='%2312b5b0' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/20px no-repeat}
.paths{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.path{padding:32px;border-radius:18px;border:1px solid var(--line);background:var(--card);box-shadow:var(--shadow)}.path h3{font-size:24px;margin-bottom:10px}.path p{color:var(--mut);margin:0 0 20px}
.band{background:linear-gradient(135deg,var(--navy),var(--deep));color:#fff;border-radius:24px;padding:54px 48px;display:flex;gap:30px;align-items:center;justify-content:space-between;flex-wrap:wrap;position:relative;overflow:hidden}
.band h2{color:#fff}.band p{color:#cfe3f1;margin:8px 0 0;font-size:18px}
/* inner page head */
.page-head{background:radial-gradient(700px 300px at 85% 0,rgba(18,181,176,.25),transparent 70%),linear-gradient(180deg,var(--navy2),var(--navy));color:#fff;padding:58px 0 54px;position:relative;overflow:hidden}
.page-head:before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(143,211,244,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(143,211,244,.06) 1px,transparent 1px);background-size:44px 44px}
.page-head .wrap{position:relative}.page-head h1{font-size:clamp(34px,4.6vw,46px);font-weight:780}.page-head p{color:#cfe3f1;font-size:19px;margin:12px 0 0;max-width:640px}
/* prose */
.prose{max-width:760px}.prose h2{font-size:28px;margin:46px 0 12px}.prose h2:first-child{margin-top:0}.prose h3{font-size:20px;margin:26px 0 8px}
.prose ul{padding-left:22px}.prose li{margin:7px 0}
.layout{display:grid;grid-template-columns:220px 1fr;gap:56px;align-items:start}
.toc{position:sticky;top:90px;font-size:15px}.toc b{display:block;font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--mut);margin-bottom:10px}
.toc a{display:block;padding:7px 12px;border-left:2px solid var(--line);color:var(--mut);text-decoration:none}.toc a:hover{color:var(--ink);border-color:var(--teal)}
ol.steps{list-style:none;counter-reset:s;padding:0;margin:18px 0}
ol.steps li{counter-increment:s;position:relative;padding:4px 0 14px 54px;margin:0;min-height:58px}
ol.steps li:before{content:counter(s);position:absolute;left:0;top:0;width:36px;height:36px;border-radius:50%;background:var(--navy);color:#fff;font-weight:700;display:grid;place-items:center;font-size:16px}
ol.steps li:not(:last-child):after{content:"";position:absolute;left:17px;top:40px;bottom:2px;width:2px;background:var(--line)}
code{font-family:ui-monospace,Consolas,monospace;font-size:.88em;background:var(--tint);padding:2px 7px;border-radius:6px}
pre{background:var(--navy2);color:#d6e8f5;padding:18px 20px;border-radius:12px;overflow:auto;border:1px solid rgba(143,211,244,.15);line-height:1.55}pre code{background:none;padding:0;font-size:14.5px}
.note{display:flex;gap:14px;background:var(--card);border:1px solid var(--line);border-left:4px solid var(--orange);padding:16px 20px;border-radius:12px;margin:24px 0;color:var(--mut);font-size:16px}
.note b{color:var(--ink)}
.video{aspect-ratio:16/9;border-radius:16px;border:1.5px dashed var(--line);display:grid;place-items:center;text-align:center;color:var(--mut);background:var(--card);font-size:15px;margin:26px 0}
.video svg{width:54px;height:54px;margin-bottom:6px;stroke:var(--teal2);fill:none;stroke-width:1.6}
.shotph{aspect-ratio:4/3;border-radius:16px;border:1.5px dashed var(--line);display:grid;place-items:center;text-align:center;color:var(--mut);background:var(--card);font-size:15px;padding:12px}
.dl{display:flex;gap:30px;align-items:center;flex-wrap:wrap;background:var(--card);border:1px solid var(--line);border-radius:20px;padding:34px;box-shadow:var(--shadow);margin-bottom:38px}
.dl img{width:84px;height:84px}.dl .t{flex:1;min-width:260px}.dl h2{font-size:26px}.dl p{margin:6px 0 0;color:var(--mut);font-size:16px}
.dl .meta{font-size:14.5px;color:var(--mut);margin-top:14px}
table{border-collapse:collapse;width:100%;font-size:16px}th,td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--line)}th{color:var(--mut);font-weight:600}
/* footer */
footer{background:var(--navy2);color:#a9c4d8;padding:56px 0 30px;margin-top:40px;font-size:15px}
footer .cols{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px}footer h4{margin:0 0 12px;color:#fff;font-size:14px;letter-spacing:.06em;text-transform:uppercase}
footer a{color:#a9c4d8;text-decoration:none;display:block;padding:4px 0}footer a:hover{color:#fff}
footer .b{display:flex;align-items:center;gap:10px;color:#fff;font-weight:750;font-size:19px;margin-bottom:10px}footer .b img{width:32px;height:32px}
footer .legal{margin-top:36px;padding-top:20px;border-top:1px solid rgba(143,211,244,.15);font-size:14px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
@media (max-width:860px){.hero .wrap,.split,.paths,.layout{grid-template-columns:1fr}.hero .wrap{padding-top:44px;padding-bottom:52px;gap:34px}.toc{display:none}footer .cols{grid-template-columns:1fr 1fr}section{padding:54px 0}.band{padding:36px 28px}}
@media (max-width:700px){header.nav .wrap{flex-wrap:wrap;height:auto;padding-top:10px;padding-bottom:6px;gap:6px}nav{margin-left:0;width:100%;overflow-x:auto;padding-bottom:6px}nav a{white-space:nowrap}nav a.gh{margin-left:0}}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}