/* AQ Pay blog — matches the portal palette (demo.aqpay.services) */
:root{--bg:#060A14;--surface:#0F1729;--card:rgba(19,29,54,.42);--fg:#F4F7FC;--muted:#AEB9CC;--faint:#6F7D93;--line:rgba(255,255,255,.08);--primary:#6E9BFF;--accent:#3DDC97;--gold:#E6C27A;--radius:18px}
*{box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font-family:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;-webkit-font-smoothing:antialiased;line-height:1.6;overflow-x:hidden}
a{color:var(--primary);text-decoration:none}a:hover{color:var(--accent)}
img{max-width:100%;height:auto;display:block}
::selection{background:var(--primary);color:var(--bg)}
.wrap{max-width:1240px;margin:0 auto;padding:0 24px}
.mono{font-family:'JetBrains Mono',ui-monospace,monospace;font-size:12px;letter-spacing:.16em;text-transform:uppercase}
/* header */
.hdr{position:sticky;top:0;z-index:50;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);background:rgba(6,10,20,.78);border-bottom:1px solid var(--line)}
.hdr .wrap{height:72px;display:flex;align-items:center;gap:28px}
.brand{display:flex;align-items:center;gap:12px;color:var(--fg);font-weight:600;font-size:17px;letter-spacing:-.01em}
.brand img{width:36px;height:36px}
.nav{display:flex;gap:2px;flex:1;justify-content:center}
.nav a{color:var(--muted);font-weight:600;font-size:15px;padding:10px 14px;border-radius:999px}
.nav a:hover,.nav a[aria-current]{color:var(--fg);background:rgba(255,255,255,.06)}
.hdr-cta{display:flex;gap:10px;align-items:center;margin-left:auto}
.btn{display:inline-flex;align-items:center;gap:8px;background:var(--primary);color:var(--bg);font-weight:700;font-size:15px;padding:11px 20px;border-radius:999px;transition:background .2s,transform .2s}
.btn:hover{background:var(--accent);color:var(--bg);transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--fg);border:1px solid rgba(255,255,255,.18);padding:10px 19px}
.btn-ghost:hover{background:transparent;border-color:var(--primary);color:var(--fg)}
.login{color:var(--muted);font-weight:600;font-size:15px;padding:10px 12px}
.menu{display:none;position:relative}
.menu summary{list-style:none;cursor:pointer;width:44px;height:44px;border-radius:12px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);display:flex;align-items:center;justify-content:center}
.menu summary::-webkit-details-marker{display:none}
.menu .panel{position:absolute;right:0;top:54px;width:min(86vw,320px);background:#0B1324;border:1px solid var(--line);border-radius:16px;padding:10px;display:grid;gap:2px;box-shadow:0 30px 60px rgba(0,0,0,.5)}
.menu .panel a{color:var(--fg);padding:12px;border-radius:10px;font-weight:600}
.menu .panel a:hover{background:rgba(255,255,255,.05)}
@media (max-width:960px){.nav,.hdr-cta .login,.hdr-cta .btn{display:none}.menu{display:block}}
/* hero / index */
.hero{padding:clamp(64px,9vw,120px) 0 clamp(36px,5vw,56px);background:radial-gradient(ellipse 50% 60% at 85% 20%,rgba(110,155,255,.12),transparent 70%)}
.crumbs{font-family:'JetBrains Mono',monospace;font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--faint);display:flex;flex-wrap:wrap;gap:10px}
.crumbs a{color:var(--faint)}.crumbs a:hover{color:var(--fg)}.crumbs [aria-current]{color:var(--primary)}
h1{font-weight:700;font-size:clamp(36px,5.2vw,68px);line-height:1.02;letter-spacing:-.035em;margin:18px 0 18px;text-wrap:balance}
.lede{font-size:clamp(17px,1.4vw,20px);color:var(--muted);max-width:680px;margin:0;text-wrap:pretty}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:26px}
.chip{font-size:13.5px;font-weight:600;color:var(--fg);border:1px solid rgba(255,255,255,.14);padding:8px 14px;border-radius:999px;background:rgba(255,255,255,.03)}
.chip:hover,.chip[aria-current]{border-color:var(--primary);color:var(--fg)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(330px,1fr));gap:20px;padding-bottom:clamp(64px,8vw,110px)}
.card{background:var(--card);border:1px solid var(--line);border-radius:22px;overflow:hidden;color:var(--fg);display:flex;flex-direction:column;transition:border-color .25s,transform .25s}
.card:hover{border-color:rgba(110,155,255,.5);color:var(--fg);transform:translateY(-3px)}
.card img{aspect-ratio:1200/630;object-fit:cover;width:100%}
.card .body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1}
.card h2,.card h3{font-size:19px;line-height:1.3;margin:0;letter-spacing:-.01em}
.card p{margin:0;color:var(--muted);font-size:14.5px;line-height:1.55}
.meta{display:flex;flex-wrap:wrap;gap:6px 14px;font-size:13px;color:var(--faint);margin-top:auto}
.cat{color:var(--primary)}
.feature{grid-column:1/-1;display:grid;grid-template-columns:1.25fr 1fr}
.feature .body{padding:clamp(24px,3vw,40px);justify-content:center}
.feature h2{font-size:clamp(24px,2.6vw,34px)}
@media (max-width:800px){.feature{grid-template-columns:1fr}}
/* article */
.article-hero{padding:clamp(48px,7vw,96px) 0 28px}
.article-hero .wrap,.article .wrap{max-width:1180px}
.byline{display:flex;flex-wrap:wrap;align-items:center;gap:8px 16px;color:var(--muted);font-size:14.5px;margin-top:6px}
.byline img{width:28px;height:28px}
.cover{border-radius:24px;overflow:hidden;border:1px solid var(--line);margin:30px 0 0}
.article{padding:clamp(32px,4vw,56px) 0 clamp(64px,8vw,110px)}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:56px;align-items:start}
@media (max-width:1000px){.layout{grid-template-columns:minmax(0,1fr)}.toc{display:none}}
.toc{position:sticky;top:96px;border:1px solid var(--line);border-radius:var(--radius);padding:20px;background:rgba(15,23,41,.5)}
.toc ol{list-style:none;margin:12px 0 0;padding:0;display:grid;gap:8px;font-size:14px}
.toc a{color:var(--muted)}.toc a:hover{color:var(--fg)}
.toc .btn{margin-top:18px;width:100%;justify-content:center;font-size:14px}
.prose{font-size:17.5px;line-height:1.75;color:#D7DEEA;max-width:740px}
.prose>*:first-child{margin-top:0}
.prose h2{font-size:clamp(24px,2.4vw,32px);line-height:1.2;letter-spacing:-.02em;color:var(--fg);margin:2.2em 0 .6em;scroll-margin-top:96px}
.prose h3{font-size:21px;line-height:1.3;color:var(--fg);margin:1.8em 0 .5em;scroll-margin-top:96px}
.prose p{margin:0 0 1.15em}
.prose ul,.prose ol{padding-left:1.3em;margin:0 0 1.2em}.prose li{margin:.35em 0}
.prose li::marker{color:var(--primary)}
.prose strong{color:var(--fg)}
.prose a{text-decoration:underline;text-decoration-color:rgba(110,155,255,.45);text-underline-offset:3px}
.prose blockquote{margin:1.6em 0;padding:18px 22px;border-left:3px solid var(--accent);background:rgba(61,220,151,.06);border-radius:0 14px 14px 0;color:var(--fg)}
.prose blockquote p:last-child{margin:0}
.prose code{font-family:'JetBrains Mono',monospace;font-size:.86em;background:rgba(255,255,255,.06);padding:.15em .4em;border-radius:6px}
.prose pre{background:#0B1324;border:1px solid var(--line);border-radius:14px;padding:18px;overflow-x:auto;font-size:14px;line-height:1.6}
.prose pre code{background:none;padding:0}
.prose table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15px;display:block;overflow-x:auto}
.prose th,.prose td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--line);vertical-align:top}
.prose th{color:var(--fg);font-size:13px;letter-spacing:.06em;text-transform:uppercase;background:rgba(255,255,255,.03)}
.prose figure{margin:2em 0;padding:clamp(16px,2.5vw,28px);border:1px solid var(--line);border-radius:20px;background:rgba(15,23,41,.55)}
.prose figure svg{width:100%;height:auto;display:block}
.prose figcaption{margin-top:14px;font-size:14px;color:var(--faint);text-align:center}
.prose img{border-radius:16px}
.takeaways{border:1px solid rgba(110,155,255,.35);background:linear-gradient(135deg,rgba(110,155,255,.1),rgba(61,220,151,.05));border-radius:20px;padding:22px 24px;margin:0 0 2em}
.takeaways h2{margin:0 0 10px!important;font-size:15px!important;letter-spacing:.14em!important;text-transform:uppercase;color:var(--primary)!important;font-family:'JetBrains Mono',monospace}
.takeaways ul{margin:0}
.faq{margin-top:3em}.faq h2{margin-bottom:.8em}
.faq details{border:1px solid var(--line);border-radius:14px;background:var(--card);margin-bottom:8px}
.faq summary{cursor:pointer;padding:16px 20px;font-weight:700;color:var(--fg);list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::after{content:'+';color:var(--primary);font-size:20px;line-height:1}
.faq details[open] summary::after{content:'−'}
.faq details p{margin:0;padding:0 20px 18px;color:var(--muted);font-size:16px}
.cta{margin:3em 0 0;padding:clamp(24px,4vw,40px);border-radius:24px;background:linear-gradient(135deg,rgba(110,155,255,.16),rgba(61,220,151,.08));border:1px solid rgba(110,155,255,.3);display:flex;flex-wrap:wrap;gap:20px;align-items:center;justify-content:space-between}
.cta h2{margin:0 0 6px!important;font-size:24px!important}
.cta p{margin:0;color:var(--muted);font-size:16px}
.author{display:flex;gap:14px;align-items:center;margin-top:2.5em;padding-top:24px;border-top:1px solid var(--line);font-size:15px;color:var(--muted)}
.author img{width:44px;height:44px}
.author strong{display:block;color:var(--fg)}
.related{padding:clamp(48px,6vw,80px) 0;border-top:1px solid var(--line)}
.related h2{font-size:clamp(24px,2.6vw,34px);margin:0 0 24px;letter-spacing:-.02em}
.related .grid{padding-bottom:0}
/* footer */
.ftr{border-top:1px solid var(--line);background:#04070F;padding:64px 0 28px;position:relative}
.ftr::before{content:'';position:absolute;left:0;right:0;top:-1px;height:1px;background:linear-gradient(90deg,transparent,rgba(110,155,255,.55) 30%,rgba(61,220,151,.45) 70%,transparent)}
.ftr-grid{display:grid;grid-template-columns:minmax(240px,1.5fr) repeat(4,minmax(0,1fr));gap:40px 32px}
.ftr p{color:var(--muted);font-size:14.5px;margin:16px 0 22px;max-width:360px}
.ftr h3{font-family:'JetBrains Mono',monospace;font-size:11px;font-weight:500;letter-spacing:.16em;text-transform:uppercase;color:var(--primary);margin:0 0 16px}
.ftr ul{list-style:none;margin:0;padding:0;display:grid;gap:11px}
.ftr ul a{color:var(--muted);font-size:14.5px}.ftr ul a:hover{color:var(--fg)}
.ftr-base{margin-top:56px;padding-top:22px;border-top:1px solid var(--line);display:grid;gap:14px;font-size:13px;color:var(--faint)}
.ftr-base .row{display:flex;flex-wrap:wrap;justify-content:space-between;gap:14px}
.ftr-base a{color:var(--muted)}
@media (max-width:1023px){.ftr-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.ftr-grid>:first-child{grid-column:1/-1}}
@media (max-width:639px){.ftr-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}