/* КриптоШаг design v2: mobile-first, system fonts, light/dark, no web fonts */
:root{--bg:#f6f7fb;--sf:#fff;--sf2:#f1f3f8;--fg:#0f172a;--mut:#5b6475;--line:#e3e7ef;--brand:#f7a600;--brand-d:#e09600;--ink:#1a1300;--link:#1d4ed8;
--ok:#0f9d58;--up:#0a8f4c;--down:#d03a2f;--r:14px;--sh:0 1px 2px rgba(15,23,42,.04),0 4px 16px rgba(15,23,42,.06)}
@media (prefers-color-scheme:dark){:root{--bg:#0b0e14;--sf:#131823;--sf2:#1a2130;--fg:#e8ecf3;--mut:#9aa4b5;--line:#253043;--link:#8ab4ff;--ink:#1a1300;--sh:0 1px 2px rgba(0,0,0,.3),0 6px 20px rgba(0,0,0,.25);--up:#34c27a;--down:#ff6b5e}}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:120px}
body{margin:0;font:16.5px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color:var(--fg);background:var(--bg);-webkit-font-smoothing:antialiased}
.wrap{max-width:1080px;margin:0 auto;padding:0 18px}
a{color:var(--link);text-underline-offset:2px}a:hover{text-decoration:none}
.ic{width:18px;height:18px;flex:none;vertical-align:-3px}
h1{font-size:28px;line-height:1.2;letter-spacing:-.02em;margin:8px 0 12px;font-weight:800}
h2{font-size:21px;line-height:1.3;letter-spacing:-.01em;margin:36px 0 12px;font-weight:750}
h3{font-size:18px;margin:24px 0 8px}
p{margin:0 0 14px}
.muted{color:var(--mut)}.small{font-size:14px}
/* header */
.top{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--sf) 92%,transparent);backdrop-filter:saturate(1.6) blur(10px);-webkit-backdrop-filter:saturate(1.6) blur(10px);border-bottom:1px solid var(--line);padding-top:env(safe-area-inset-top)}
.bar{display:flex;align-items:center;gap:10px;height:56px}
.logo{display:flex;align-items:center;gap:9px;color:var(--fg);text-decoration:none;font-weight:800;font-size:18px;letter-spacing:-.01em;margin-right:auto}
.mark{width:30px;height:30px}
.nav{display:flex;gap:4px;overflow-x:auto;scrollbar-width:none;padding-bottom:8px;-webkit-mask-image:linear-gradient(90deg,#000 92%,transparent)}
.nav::-webkit-scrollbar{display:none}
.nav a{flex:none;color:var(--mut);text-decoration:none;font-size:14px;font-weight:550;padding:6px 11px;border-radius:999px}
.nav a:hover{background:var(--sf2);color:var(--fg)}.nav a[aria-current]{background:var(--fg);color:var(--sf)}
.langs{position:relative}.langs summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:5px;font-size:13px;font-weight:650;color:var(--mut);padding:7px 10px;border:1px solid var(--line);border-radius:999px}
.langs summary::-webkit-details-marker{display:none}
.langs-menu{position:absolute;right:0;top:calc(100% + 6px);background:var(--sf);border:1px solid var(--line);border-radius:12px;box-shadow:var(--sh);padding:6px;display:grid;grid-template-columns:repeat(3,52px);gap:2px}
.langs-menu a{text-align:center;font-size:13px;font-weight:600;color:var(--fg);text-decoration:none;padding:7px 0;border-radius:8px}.langs-menu a:hover,.langs-menu a[aria-current]{background:var(--sf2)}
/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--brand);color:var(--ink);font-weight:750;text-decoration:none;border-radius:12px;padding:12px 18px;border:0;transition:background .15s,transform .05s}
.btn:hover{background:var(--brand-d)}.btn:active{transform:translateY(1px)}
.btn-sm{padding:8px 14px;font-size:14px;border-radius:10px}.btn-lg{width:100%;padding:15px 20px;font-size:17px}
/* hero */
.hero{display:grid;gap:18px;padding:26px 0 8px}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--brand-d);margin:0 0 4px}
.lead{font-size:17.5px;color:var(--mut);max-width:60ch}
.trust{list-style:none;padding:0;margin:14px 0 0;display:flex;flex-wrap:wrap;gap:8px}
.trust li{display:flex;align-items:center;gap:6px;font-size:13.5px;color:var(--mut);background:var(--sf);border:1px solid var(--line);border-radius:999px;padding:5px 11px}
.trust li .ic{color:var(--ok);width:16px;height:16px}
/* CTA card */
.cta{background:var(--sf);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--sh);padding:18px;margin:18px 0;display:grid;gap:12px}
.hero .cta{margin:0}
.cta-head{display:flex;align-items:center;gap:8px;font-size:17px}.cta-head .ic{color:var(--brand-d);width:22px;height:22px}
.code-box{display:flex;align-items:center;justify-content:space-between;gap:10px;background:var(--sf2);border:1.5px dashed color-mix(in srgb,var(--brand) 70%,var(--line));border-radius:12px;padding:10px 10px 10px 14px}
.code-l{display:block;font-size:12px;font-weight:650;text-transform:uppercase;letter-spacing:.05em;color:var(--mut)}
.code-v{display:block;font:800 26px/1.15 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;letter-spacing:.08em}
.copy{display:inline-flex;align-items:center;gap:6px;background:var(--sf);color:var(--fg);border:1px solid var(--line);border-radius:10px;padding:10px 13px;font:600 14px/1 inherit;cursor:pointer;min-height:44px}
.copy:hover{border-color:var(--mut)}.copy.done{color:var(--ok);border-color:var(--ok)}
.code-hint{margin:-4px 0 0;font-size:13.5px;color:var(--mut)}
.note{background:var(--sf);border:1px solid var(--line);border-radius:12px;padding:12px 14px;font-size:14.5px;color:var(--mut)}
/* sections, steps, cards */
.sec{margin-top:8px}
.steps{list-style:none;padding:0;margin:0;display:grid;gap:10px;counter-reset:s}
.steps a{display:grid;grid-template-columns:40px 1fr;column-gap:12px;align-items:start;background:var(--sf);border:1px solid var(--line);border-radius:var(--r);padding:14px;text-decoration:none;color:var(--fg);height:100%;transition:border-color .15s,box-shadow .15s}
.steps a:hover{border-color:var(--brand);box-shadow:var(--sh)}
.num{grid-row:span 2;width:40px;height:40px;border-radius:12px;background:color-mix(in srgb,var(--brand) 18%,transparent);color:var(--brand-d);font-weight:800;font-size:18px;display:flex;align-items:center;justify-content:center}
.steps b{font-size:16px}.steps span:not(.num){color:var(--mut);font-size:14.5px;line-height:1.5}
.cards{display:grid;gap:10px}
.card{display:flex;flex-direction:column;gap:6px;background:var(--sf);border:1px solid var(--line);border-radius:var(--r);padding:16px;text-decoration:none;color:var(--fg);transition:border-color .15s,box-shadow .15s}
.card:hover{border-color:var(--brand);box-shadow:var(--sh)}
.card b{font-size:16.5px;line-height:1.35}.card span{color:var(--mut);font-size:14.5px;line-height:1.5}
.card i{font-style:normal;margin-top:auto;padding-top:4px;color:var(--link);font-size:14px;font-weight:650;display:flex;align-items:center;gap:4px}.card i .ic{width:16px;height:16px}
.chips{display:flex;flex-wrap:wrap;gap:8px}.chip{background:var(--sf);border:1px solid var(--line);border-radius:999px;padding:8px 14px;text-decoration:none;color:var(--fg);font-size:14.5px;font-weight:550}.chip:hover{border-color:var(--brand)}
.list{list-style:none;padding:0;margin:0;background:var(--sf);border:1px solid var(--line);border-radius:var(--r)}
.list li{display:flex;flex-wrap:wrap;justify-content:space-between;gap:4px 12px;padding:12px 14px;border-top:1px solid var(--line)}.list li:first-child{border-top:0}
.list .muted{font-size:13.5px;white-space:nowrap}
.more{display:inline-flex;align-items:center;gap:4px;font-weight:650;margin-top:10px;text-decoration:none}
/* tables */
.tw{overflow-x:auto;background:var(--sf);border:1px solid var(--line);border-radius:var(--r);margin:0 0 12px}
table{border-collapse:collapse;width:100%;font-size:14.5px;font-variant-numeric:tabular-nums}
th,td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--line);white-space:nowrap}th{background:var(--sf2);font-size:13px;color:var(--mut);font-weight:650}
tr:last-child td{border-bottom:0}.up{color:var(--up)}.down{color:var(--down)}
.body td,.body th{white-space:normal}
/* article */
.crumbs{display:flex;flex-wrap:wrap;gap:6px;font-size:13.5px;color:var(--mut);margin:18px 0 4px}.crumbs a{color:var(--mut)}
.art{max-width:740px}
.art-head{margin-bottom:6px}
.answer{position:relative;background:var(--sf);border:1px solid var(--line);border-left:4px solid var(--brand);border-radius:var(--r);padding:16px 18px;margin:16px 0;font-size:16.5px}
.answer-l{display:block;font-size:12px;font-weight:750;text-transform:uppercase;letter-spacing:.06em;color:var(--brand-d);margin-bottom:4px}
.answer p:last-child{margin:0}
.toc{background:var(--sf);border:1px solid var(--line);border-radius:var(--r);margin:18px 0;padding:4px 16px}
.toc summary{cursor:pointer;font-weight:700;padding:10px 0;list-style:none}.toc summary::-webkit-details-marker{display:none}
.toc summary::after{content:"";float:right;width:9px;height:9px;margin-top:7px;border-right:2px solid var(--mut);border-bottom:2px solid var(--mut);transform:rotate(45deg);transition:transform .15s}
.toc details[open] summary::after{transform:rotate(-135deg);margin-top:11px}
.toc ol{margin:0 0 12px;padding-left:20px;font-size:15px}.toc li{margin:5px 0}.toc a{color:var(--fg);text-decoration:none}.toc a:hover{color:var(--link)}
.body ul,.body ol{padding-left:22px}.body li{margin:6px 0}
.body ol>li::marker{font-weight:700;color:var(--brand-d)}
.body blockquote{margin:16px 0;padding:10px 16px;border-left:3px solid var(--line);color:var(--mut)}
.long p{margin:0}
.faq details{background:var(--sf);border:1px solid var(--line);border-radius:12px;margin:8px 0}
.faq summary{cursor:pointer;font-weight:650;padding:14px 44px 14px 16px;position:relative;list-style:none}.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";position:absolute;right:18px;top:20px;width:9px;height:9px;border-right:2px solid var(--mut);border-bottom:2px solid var(--mut);transform:rotate(45deg);transition:transform .15s}
.faq details[open] summary::after{transform:rotate(-135deg);top:24px}
.faq-a{padding:0 16px 4px;color:var(--fg)}
.product{background:var(--sf);border:1px solid var(--line);border-radius:var(--r);padding:4px 18px 2px;margin-top:30px}.product .cta{box-shadow:none;background:var(--sf2)}
.checks{list-style:none;padding:0}.checks li{position:relative;padding-left:26px;margin:8px 0}
.checks li::before{content:"";position:absolute;left:4px;top:7px;width:10px;height:6px;border-left:2.4px solid var(--ok);border-bottom:2.4px solid var(--ok);transform:rotate(-45deg)}
.src{margin-top:26px;font-size:14px;color:var(--mut)}.src summary{cursor:pointer;font-weight:650;color:var(--fg)}.src li{margin:6px 0}
.tag{display:inline-block;background:color-mix(in srgb,var(--brand) 18%,transparent);color:var(--brand-d);border-radius:999px;padding:2px 10px;font-size:12.5px;font-weight:700}
.news{list-style:none;padding:0}.news li{background:var(--sf);border:1px solid var(--line);border-radius:12px;padding:12px 14px;margin:8px 0}
.promos li{margin:8px 0}
/* footer + sticky */
.foot{border-top:1px solid var(--line);margin-top:48px;padding:24px 0 28px;font-size:13.5px;color:var(--mut);background:var(--sf)}
.foot-brand b{color:var(--fg);margin-right:4px}.foot p{margin:10px 0}
.foot-links{display:flex;flex-wrap:wrap;gap:6px 16px}.foot-links a{color:var(--mut)}
.sticky-cta{position:fixed;left:0;right:0;bottom:0;z-index:30;background:color-mix(in srgb,var(--sf) 94%,transparent);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-top:1px solid var(--line);padding:10px 14px calc(10px + env(safe-area-inset-bottom));transition:transform .2s}
.sticky-cta.hide{transform:translateY(110%)}
.sticky-in{max-width:1080px;margin:0 auto;display:flex;align-items:center;gap:12px}
.sticky-code{font-size:14px;color:var(--mut);line-height:1.2}.sticky-code b{display:block;color:var(--fg);font:800 18px ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:.06em}
.sticky-in .btn{flex:1;padding:13px 16px}
body.has-sticky{padding-bottom:calc(76px + env(safe-area-inset-bottom))}
.hide-s{display:none}
.btn.top-cta{display:none}
.side{display:none}
/* tablet / desktop */
@media (min-width:640px){.cards{grid-template-columns:repeat(2,1fr)}.steps{grid-template-columns:repeat(2,1fr)}.hide-s{display:table-cell}}
@media (min-width:900px){
 h1{font-size:40px}.hero{grid-template-columns:1.25fr 1fr;align-items:center;gap:40px;padding:44px 0 16px}
 .cards{grid-template-columns:repeat(3,1fr)}.steps{grid-template-columns:repeat(5,1fr)}
 .steps a{grid-template-columns:1fr;row-gap:8px}.num{grid-row:auto}
 .btn.top-cta{display:inline-flex}
 .sticky-cta{display:none}body.has-sticky{padding-bottom:0}
 .art h1{font-size:36px}
}
@media (min-width:1100px){
 .with-side{display:grid;grid-template-columns:minmax(0,740px) 300px;gap:40px;justify-content:space-between}
 .side{display:block}.side-in{position:sticky;top:84px}
 .side .cta{margin-top:58px}.side .code-v{font-size:22px}
}
@media (min-width:1100px){.with-side .cta-top{display:none}}