:root{
  --bg:#ffffff; --bg-2:#f5f6fa; --surface:#ffffff; --text:#0f1222; --muted:#5a6078; --line:#e5e7ef;
  --brand:#4f46e5; --brand-2:#06b6d4; --brand-soft:#eef0ff; --accent:#16a34a;
  --shadow:0 12px 32px rgba(15,18,34,.08); --radius:18px;
}
@media (prefers-color-scheme: dark){
  :root{ --bg:#0b0d17; --bg-2:#11142a; --surface:#151935; --text:#eef0fb; --muted:#a3a9c6; --line:#262b4d;
         --brand:#818cf8; --brand-2:#22d3ee; --brand-soft:#1c2150; --accent:#4ade80; --shadow:0 12px 32px rgba(0,0,0,.4); }
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Inter",system-ui,-apple-system,Segoe UI,sans-serif;background:var(--bg);color:var(--text);line-height:1.65;font-size:17px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--brand)}
.wrap{max-width:1160px;margin:0 auto;padding:0 16px}
.narrow{max-width:760px}
h1,h2,h3{line-height:1.2;letter-spacing:-.02em;margin:0 0 .5em}
h1{font-size:clamp(36px,5.2vw,60px)}
h2{font-size:clamp(28px,3.6vw,40px)}
h3{font-size:20px}
p{margin:0 0 1em}
.muted{color:var(--muted)}
.grad{background:linear-gradient(90deg,var(--brand),var(--brand-2));-webkit-background-clip:text;background-clip:text;color:transparent}
.skip{position:absolute;left:-999px}
.skip:focus{left:16px;top:16px;background:var(--surface);padding:8px 12px;z-index:99}

/* header */
.site-head{position:sticky;top:0;z-index:30;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:24px;height:68px}
.logo{font-weight:800;font-size:22px;color:var(--text);text-decoration:none;letter-spacing:-.03em;margin-right:auto}
.logo span{color:var(--brand)}
.menu{display:flex;gap:6px;list-style:none;margin:0;padding:0}
.menu a{color:var(--muted);text-decoration:none;font-weight:500;padding:8px 12px;border-radius:10px}
.menu a:hover,.menu a[aria-current]{color:var(--text);background:var(--bg-2)}
.burger{display:none;background:none;border:1px solid var(--line);border-radius:10px;width:42px;height:42px;color:var(--text);font-size:20px;cursor:pointer}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:12px;font-weight:600;font-size:16px;text-decoration:none;border:0;cursor:pointer;font-family:inherit;transition:transform .15s,box-shadow .15s}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px color-mix(in srgb,var(--brand) 35%,transparent)}
.btn-ghost{background:var(--surface);color:var(--text);border:1px solid var(--line)}

/* hero */
.hero{padding-top:72px;padding-bottom:64px;display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;background:var(--brand-soft);color:var(--brand);padding:6px 14px;border-radius:999px;font-weight:600;font-size:14px;margin-bottom:18px}
.eyebrow::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--accent)}
.lead{font-size:19px;color:var(--muted);max-width:560px}
.cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.portrait{position:relative;aspect-ratio:1;border-radius:32px;background:linear-gradient(145deg,var(--brand),var(--brand-2));display:grid;place-items:center;box-shadow:var(--shadow);overflow:hidden}
.portrait img{width:100%;height:100%;object-fit:cover}
.portrait .initial{font-size:clamp(120px,16vw,200px);font-weight:800;color:rgba(255,255,255,.92);letter-spacing:-.05em}
.badge{position:absolute;background:var(--surface);color:var(--text);border:1px solid var(--line);border-radius:14px;padding:10px 14px;font-weight:600;font-size:14px;box-shadow:var(--shadow)}
.badge small{display:block;color:var(--muted);font-weight:500}
.badge.b1{left:-14px;bottom:28px}
.badge.b2{right:-10px;top:28px}

/* sections */
section{padding:72px 0}
.alt{background:var(--bg-2)}
.head{max-width:680px;margin:0 0 40px}
.head.center{text-align:center;margin-left:auto;margin-right:auto}
.kicker{color:var(--brand);font-weight:700;text-transform:uppercase;letter-spacing:.08em;font-size:13px;margin-bottom:8px;display:block}

.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.stat{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.stat b{display:block;font-size:24px;letter-spacing:-.02em}
.stat span{color:var(--muted);font-size:15px}

.grid{display:grid;gap:18px;grid-template-columns:repeat(auto-fill,minmax(300px,1fr))}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px;display:flex;flex-direction:column;gap:8px;text-decoration:none;color:var(--text);transition:transform .2s,box-shadow .2s,border-color .2s}
a.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:color-mix(in srgb,var(--brand) 40%,var(--line))}
.card .ic{width:48px;height:48px;border-radius:14px;background:var(--brand-soft);color:var(--brand);display:grid;place-items:center;font-size:22px;margin-bottom:6px}
.card p{color:var(--muted);margin:0;flex:1}
.card .more{color:var(--brand);font-weight:600;margin-top:8px}

.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.checks{list-style:none;padding:0;margin:0 0 1em;display:grid;gap:10px}
.checks li{padding-left:32px;position:relative}
.checks li::before{content:"\2713";position:absolute;left:0;top:1px;width:22px;height:22px;border-radius:50%;background:var(--brand-soft);color:var(--brand);font-size:13px;display:grid;place-items:center;font-weight:700}

.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:s}
.step{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.step::before{counter-increment:s;content:"0" counter(s);display:block;font-weight:800;font-size:28px;color:var(--brand);margin-bottom:8px}
.step p{color:var(--muted);margin:0}

.tags{display:flex;flex-wrap:wrap;gap:10px}
.tags span{background:var(--surface);border:1px solid var(--line);padding:8px 14px;border-radius:999px;font-weight:500;font-size:15px}

.faq{display:grid;gap:12px}
details{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:18px 22px}
summary{font-weight:600;cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:16px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";color:var(--brand);font-size:24px;line-height:1}
details[open] summary::after{content:"\2212"}
details p{color:var(--muted);margin:12px 0 0}

.band{background:linear-gradient(135deg,var(--brand),#312e81);color:#fff;border-radius:28px;padding:56px 32px;text-align:center}
.band h2{color:#fff}
.band p{opacity:.88;max-width:560px;margin:0 auto 24px}
.band .btn-ghost{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.3);color:#fff}
.band .cta{justify-content:center}

/* page hero + article */
.page-hero{padding-top:56px;padding-bottom:32px}
.crumbs{font-size:14px;color:var(--muted);margin-bottom:16px}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--brand)}
.prose{font-size:18px}
.prose h2{font-size:28px;margin-top:1.6em}
.prose h3{margin-top:1.4em}
.prose ul,.prose ol{padding-left:22px;margin:0 0 1em}
.prose li{margin-bottom:6px}
.prose blockquote{margin:1.4em 0;padding:16px 20px;border-left:4px solid var(--brand);background:var(--bg-2);border-radius:0 12px 12px 0}
.meta{color:var(--muted);font-size:15px}
.toc{background:var(--bg-2);border:1px solid var(--line);border-radius:14px;padding:18px 22px;margin:0 0 28px}
.toc ol{margin:8px 0 0}

/* forms */
.form{display:grid;gap:14px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:28px}
.form label{font-weight:600;font-size:15px;display:grid;gap:6px}
.form input,.form textarea,.form select{font:inherit;padding:12px 14px;border-radius:10px;border:1px solid var(--line);background:var(--bg);color:var(--text)}
.form textarea{min-height:130px;resize:vertical}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.hp{position:absolute;left:-9999px}
.note{font-size:15px;padding:10px 14px;border-radius:10px;display:none}
.note.ok{display:block;background:color-mix(in srgb,var(--accent) 15%,transparent);color:var(--accent)}
.note.err{display:block;background:#fee2e2;color:#991b1b}

/* footer */
.site-foot{border-top:1px solid var(--line);padding:56px 0 28px;margin-top:40px;background:var(--bg-2)}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
.site-foot h4{margin:0 0 12px;font-size:15px}
.site-foot ul{list-style:none;padding:0;margin:0;display:grid;gap:8px}
.site-foot a{color:var(--muted);text-decoration:none;font-size:15px}
.site-foot a:hover{color:var(--brand)}
.copy{border-top:1px solid var(--line);margin-top:36px;padding-top:20px;color:var(--muted);font-size:14px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}

/* chat widget */
.chat-fab{position:fixed;right:18px;bottom:18px;z-index:50;width:60px;height:60px;border-radius:50%;border:0;background:var(--brand);color:#fff;cursor:pointer;box-shadow:0 10px 28px rgba(0,0,0,.28);display:grid;place-items:center}
.chat-fab svg{width:28px;height:28px}
.chat-box{position:fixed;right:18px;bottom:90px;z-index:50;width:min(360px,calc(100vw - 32px));background:var(--surface);border:1px solid var(--line);border-radius:20px;box-shadow:0 20px 50px rgba(0,0,0,.25);overflow:hidden;display:none;flex-direction:column}
.chat-box.open{display:flex}
.chat-top{background:linear-gradient(135deg,var(--brand),#312e81);color:#fff;padding:16px 18px;display:flex;align-items:center;gap:12px}
.chat-top .av{width:40px;height:40px;border-radius:50%;background:rgba(255,255,255,.2);display:grid;place-items:center;font-weight:800}
.chat-top b{display:block}
.chat-top small{opacity:.85}
.chat-top button{margin-left:auto;background:none;border:0;color:#fff;font-size:22px;cursor:pointer}
.chat-log{padding:16px;display:flex;flex-direction:column;gap:10px;max-height:300px;overflow:auto;background:var(--bg-2)}
.msg{max-width:85%;padding:10px 14px;border-radius:14px;font-size:15px;line-height:1.45}
.msg.bot{background:var(--surface);border:1px solid var(--line);align-self:flex-start;border-bottom-left-radius:4px}
.msg.me{background:var(--brand);color:#fff;align-self:flex-end;border-bottom-right-radius:4px}
.quick{display:flex;flex-wrap:wrap;gap:6px}
.quick button{font:inherit;font-size:14px;padding:6px 12px;border-radius:999px;border:1px solid var(--brand);background:transparent;color:var(--brand);cursor:pointer}
.chat-form{display:grid;gap:8px;padding:12px;border-top:1px solid var(--line)}
.chat-form input,.chat-form textarea{font:inherit;font-size:15px;padding:10px 12px;border-radius:10px;border:1px solid var(--line);background:var(--bg);color:var(--text)}
.chat-form textarea{min-height:60px;resize:none}

@media (max-width:900px){
  .hero,.split{grid-template-columns:1fr}
  .hero{padding-top:40px}
  .portrait{max-width:380px}
  .stats,.steps{grid-template-columns:1fr 1fr}
  .foot-grid{grid-template-columns:1fr 1fr}
  .burger{display:block}
  .menu{display:none;position:absolute;top:68px;left:0;right:0;flex-direction:column;background:var(--bg);border-bottom:1px solid var(--line);padding:12px 16px}
  .menu.open{display:flex}
  .nav .btn{display:none}
}
@media (max-width:560px){
  .stats,.steps,.foot-grid,.form .row{grid-template-columns:1fr}
  .band{padding:40px 20px}
  .badge.b1{left:8px}.badge.b2{right:8px}
}