/* XthonPay — neo-brutalist technical v4 */

:root{
  --paper:#F4F1EA;
  --paper-2:#ECE7DA;
  --paper-3:#E1DACA;
  --ink:#0A0A0A;
  --ink-dim:#2A2A2A;
  --ink-mute:#6B6B6B;
  --ink-soft:#9C978A;
  --rule:#0A0A0A;
  --rule-soft:#C9C1AE;
  --lime:#D6FB41;
  --lime-hi:#E5FF6B;
  --coral:#FF5E3A;
  --coral-hi:#FF8365;
  --cobalt:#1A4DFF;
  --ok:#1EA26E;
  --err:#D1361D;

  --disp:'Syne','Bricolage Grotesque','Noto Sans SC','Readex Pro',system-ui,sans-serif;
  --sans:'Bricolage Grotesque','Readex Pro','Noto Sans SC',system-ui,sans-serif;
  --mono:'Martian Mono','IBM Plex Sans Arabic','Noto Sans SC',ui-monospace,monospace;

  --sh-hard:6px 6px 0 var(--ink);
  --sh-hard-sm:4px 4px 0 var(--ink);
  --sh-hard-lime:6px 6px 0 var(--lime);
  --bd:2px solid var(--ink);
  --bd-1:1px solid var(--ink);

  --ease:cubic-bezier(.22,1,.36,1);
  --ease-out:cubic-bezier(.16,1,.3,1);
  --maxw:1280px;
  --gutter:28px;
  --nav-h:68px;
}

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  font-family:var(--sans);
  font-weight:400;
  font-size:16px;
  line-height:1.5;
  background:var(--paper);
  color:var(--ink);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
input,textarea{font:inherit;outline:none}
img,svg{display:block;max-width:100%}
::selection{background:var(--lime);color:var(--ink)}

/* ── Utility ── */
.container{max-width:var(--maxw);margin:0 auto;padding:0 var(--gutter);width:100%}
.mono{font-family:var(--mono);letter-spacing:.02em}

/* ── Background — subtle dot grid ── */
.bg{position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.5}
.bg::before{
  content:'';position:absolute;inset:0;
  background-image:radial-gradient(circle,#00000010 1px,transparent 1px);
  background-size:24px 24px;
  mask-image:radial-gradient(ellipse 90% 70% at 50% 40%,black 40%,transparent 85%);
  -webkit-mask-image:radial-gradient(ellipse 90% 70% at 50% 40%,black 40%,transparent 85%);
}

/* ── Nav ── */
.nav{
  position:sticky;top:0;z-index:50;
  background:var(--paper);
  border-bottom:var(--bd);
  height:var(--nav-h);
}
.nav-inner{max-width:var(--maxw);margin:0 auto;padding:0 var(--gutter);display:grid;grid-template-columns:auto 1fr auto;align-items:center;height:100%;gap:24px}
.brand{
  display:flex;align-items:center;gap:10px;
  font-family:var(--disp);font-weight:800;font-size:22px;
  letter-spacing:-.02em;color:var(--ink);
  font-variation-settings:"wght" 800;
}
.brand .dot{width:14px;height:14px;background:var(--lime);border:var(--bd-1);flex-shrink:0}
.nav-links{display:flex;align-items:center;justify-content:center;gap:2px}
.nav-links a{
  font-family:var(--mono);font-size:12px;font-weight:500;
  letter-spacing:.08em;text-transform:uppercase;color:var(--ink-dim);
  padding:9px 14px;transition:all .18s var(--ease);
}
.nav-links a:hover{background:var(--ink);color:var(--paper)}
.nav-links a.on{background:var(--lime);color:var(--ink);border:var(--bd-1)}
.nav-right{display:flex;align-items:center;gap:10px}
.nav-toggle{display:none;width:38px;height:38px;border:var(--bd);background:var(--paper);color:var(--ink);align-items:center;justify-content:center}
.nav-toggle svg{width:16px;height:16px}

/* ── Buttons ── */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:12px 20px;
  font-family:var(--mono);font-size:12.5px;font-weight:600;
  letter-spacing:.08em;text-transform:uppercase;
  border:var(--bd);background:var(--paper);color:var(--ink);
  box-shadow:var(--sh-hard-sm);
  transition:transform .15s var(--ease),box-shadow .15s var(--ease),background .2s var(--ease);
  position:relative;
}
.btn svg{width:14px;height:14px}
.btn:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--ink)}
.btn:active{transform:translate(0,0);box-shadow:2px 2px 0 var(--ink)}
.btn-lime{background:var(--lime)}
.btn-lime:hover{background:var(--lime-hi)}
.btn-ink{background:var(--ink);color:var(--paper)}
.btn-ink:hover{background:#222}
.btn-coral{background:var(--coral);color:var(--ink)}
.btn-lg{padding:16px 26px;font-size:13px}
.btn-sm{padding:8px 14px;font-size:11px}

/* ── Chips ── */
.chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 11px;
  font-family:var(--mono);font-size:11px;font-weight:600;
  letter-spacing:.1em;text-transform:uppercase;
  border:var(--bd-1);background:var(--paper);color:var(--ink);
}
.chip .dot{width:7px;height:7px;background:var(--lime);border:1px solid var(--ink);flex-shrink:0}
.chip-lime{background:var(--lime)}
.chip-ink{background:var(--ink);color:var(--paper);border-color:var(--ink)}

/* ── Labels / Eyebrows ── */
.label{
  display:inline-block;font-family:var(--mono);
  font-size:11px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;
  color:var(--ink-mute);
}
.label-amber,.label-lime{color:var(--ink);background:var(--lime);padding:3px 9px;border:var(--bd-1)}

/* ── Headings ── */
h1,h2,h3,h4{font-family:var(--disp);letter-spacing:-.03em;line-height:1;color:var(--ink)}
h1{font-size:clamp(3rem,8vw,7rem);font-weight:800;letter-spacing:-.045em;line-height:.95;font-variation-settings:"wght" 800}
h2{font-size:clamp(2.2rem,4.5vw,3.4rem);font-weight:800;letter-spacing:-.035em;font-variation-settings:"wght" 800}
h3{font-size:1.4rem;font-weight:700;letter-spacing:-.02em;font-variation-settings:"wght" 700}
h4{font-size:1.05rem;font-weight:700;letter-spacing:-.01em}

/* ── Card (the core brutalist surface) ── */
.card{
  background:var(--paper);
  border:var(--bd);
  box-shadow:var(--sh-hard);
  padding:28px 24px;
  position:relative;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease);
}
.card:hover{transform:translate(-3px,-3px);box-shadow:9px 9px 0 var(--ink)}
.card-tab{
  position:absolute;top:-14px;left:16px;
  padding:3px 9px;font-family:var(--mono);font-size:10.5px;font-weight:600;
  letter-spacing:.14em;text-transform:uppercase;
  background:var(--ink);color:var(--paper);border:var(--bd-1);
}
.card h3{margin-bottom:10px}
.card p{font-size:15px;line-height:1.55;color:var(--ink-dim)}
.card.lime{background:var(--lime)}
.card.lime p{color:var(--ink)}
.card.ink{background:var(--ink);color:var(--paper)}
.card.ink h3{color:var(--paper)}
.card.ink p{color:#BFBFBF}
.card.ink .card-tab{background:var(--paper);color:var(--ink)}
.card-ico{
  width:36px;height:36px;border:var(--bd-1);background:var(--paper);
  display:flex;align-items:center;justify-content:center;color:var(--ink);
  margin-bottom:16px;
}
.card-ico svg{width:18px;height:18px}
.card.ink .card-ico{background:var(--ink);color:var(--lime);border-color:var(--paper)}
.card.lime .card-ico{background:var(--ink);color:var(--lime);border-color:var(--ink)}

/* Sub-page grids */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:32px}

/* ── Section ── */
.section{padding:110px 0;position:relative}
.section-head{max-width:860px;margin-bottom:64px}
.section-head.center{text-align:center;margin-left:auto;margin-right:auto}
.section-head .label{margin-bottom:18px}
.section-head h2{line-height:.98}
.section-head h2 em{font-style:normal;background:var(--lime);padding:0 8px;font-variation-settings:"wght" 800}
.section-head h2 u{text-decoration:none;border-bottom:6px solid var(--lime);padding-bottom:2px}
.section-head p{margin-top:20px;max-width:620px;color:var(--ink-dim);font-size:17px;line-height:1.55}
.section-head.center p{margin-left:auto;margin-right:auto}

/* ── Reveal ── */
.r{opacity:0;transform:translate(8px,12px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.r.in{opacity:1;transform:translate(0,0)}
.r-d1{transition-delay:.08s}
.r-d2{transition-delay:.16s}
.r-d3{transition-delay:.24s}
.r-d4{transition-delay:.32s}
.r-d5{transition-delay:.40s}

/* ── Code ── */
.code{border:var(--bd);background:var(--ink);color:#F1EFE8;box-shadow:var(--sh-hard)}
.code-head{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-bottom:1px solid #333;font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:#9C978A;gap:12px}
.code-head .dots{display:flex;gap:6px}
.code-head .dots span{width:11px;height:11px;background:#333;border:1px solid #555}
.code-head .dots span:nth-child(1){background:var(--coral)}
.code-head .dots span:nth-child(2){background:#F5B549}
.code-head .dots span:nth-child(3){background:var(--lime)}
.code-head .tabs{display:flex;gap:2px}
.code-head .tab{padding:4px 11px;font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:#9C978A;border:1px solid transparent}
.code-head .tab.on{color:var(--ink);background:var(--lime);border-color:var(--lime)}
.code-head .tab:hover:not(.on){color:#F1EFE8}
.code-head .copy{padding:4px 10px;font-family:var(--mono);font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;color:#9C978A;border:1px solid #444;transition:all .2s}
.code-head .copy:hover{color:var(--lime);border-color:var(--lime)}
pre.code-body{padding:22px 24px;overflow-x:auto;font-family:var(--mono);font-size:13px;line-height:1.75;color:#DDD8C7;background:var(--ink)}
.code-body .k{color:#E5FF6B}
.code-body .s{color:#FFC27A}
.code-body .n{color:#FFC27A}
.code-body .c{color:#7A7568;font-style:italic}
.code-body .p{color:#E5FF6B}
.code-body .fn{color:#B8FFB0}

/* ── Table ── */
.tbl-wrap{border:var(--bd);background:var(--paper);box-shadow:var(--sh-hard)}
.tbl{width:100%;border-collapse:collapse}
.tbl th,.tbl td{padding:16px 20px;text-align:left;border-bottom:var(--bd-1);font-size:14.5px}
.tbl th{background:var(--ink);color:var(--paper);font-family:var(--mono);font-weight:500;font-size:11px;text-transform:uppercase;letter-spacing:.1em}
.tbl tr:last-child td{border-bottom:0}
.tbl td:first-child{font-family:var(--disp);font-weight:600}
.tbl td svg{width:16px;height:16px;vertical-align:middle}
.check{color:var(--ok)}
.cross{color:var(--err)}

/* ── Hero (sub-page) ── */
.hero{position:relative;padding:calc(var(--nav-h) + 60px) 0 40px;max-width:980px}
.hero .label{margin-bottom:22px}
.hero h1{margin:0 0 22px}
.hero h1 em{font-style:normal;background:var(--lime);padding:0 10px}
.hero-sub{font-size:18px;color:var(--ink-dim);max-width:620px;line-height:1.55;margin-bottom:30px}

.stats{display:grid;grid-template-columns:repeat(4,1fr);border:var(--bd);background:var(--paper);margin:40px 0 0;box-shadow:var(--sh-hard)}
.stat{padding:24px 18px;border-right:var(--bd-1)}
.stat:last-child{border-right:0}
.stat-v{font-family:var(--disp);font-size:2.2rem;font-weight:800;letter-spacing:-.03em;color:var(--ink)}
.stat-l{font-family:var(--mono);font-size:10.5px;color:var(--ink-mute);margin-top:6px;letter-spacing:.1em;text-transform:uppercase;font-weight:500}

/* ── CTA band ── */
.cta{
  padding:72px 48px;text-align:center;
  background:var(--lime);
  border:var(--bd);
  box-shadow:var(--sh-hard);
  position:relative;
}
.cta h2{margin-bottom:16px}
.cta h2 em{font-style:normal;background:var(--ink);color:var(--paper);padding:0 10px}

/* ── Footer ── */
.footer{background:var(--ink);color:var(--paper);padding:72px 0 32px;margin-top:100px;border-top:var(--bd)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:48px;max-width:var(--maxw);margin-left:auto;margin-right:auto;padding:0 var(--gutter)}
.footer-brand .brand{color:var(--paper)}
.footer-brand .brand .dot{background:var(--lime);border-color:var(--paper)}
.footer-brand p{color:#9C9684;font-size:14.5px;margin-top:14px;max-width:320px;line-height:1.6}
.footer-col h5{font-family:var(--mono);font-size:10.5px;text-transform:uppercase;letter-spacing:.14em;color:#8E8876;margin-bottom:16px;font-weight:500}
.footer-col a{display:block;padding:5px 0;color:#D7D2C1;font-size:14.5px;transition:color .2s}
.footer-col a:hover{color:var(--lime)}
.colophon{max-width:var(--maxw);margin:0 auto;padding:24px var(--gutter) 0;border-top:1px solid #2a2a2a;display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap;font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;color:#8E8876}

/* ── Docs ── */
.docs-layout{display:grid;grid-template-columns:240px 1fr;gap:56px;padding:64px 0 100px;align-items:start}
.docs-side{position:sticky;top:calc(var(--nav-h) + 24px);padding-right:24px;border-right:var(--bd-1)}
.docs-side h5{font-family:var(--mono);font-size:10.5px;font-weight:600;text-transform:uppercase;letter-spacing:.14em;color:var(--ink-mute);margin:22px 0 8px}
.docs-side h5:first-child{margin-top:0}
.docs-side a{display:block;padding:6px 10px;font-size:14px;color:var(--ink-dim);transition:all .2s var(--ease);border-left:2px solid transparent;margin-left:-12px}
.docs-side a:hover{color:var(--ink);background:var(--paper-2)}
.docs-side a.on{color:var(--ink);background:var(--lime);border-left-color:var(--ink)}
.docs-main h1{font-family:var(--disp);font-size:clamp(2.4rem,5vw,3.4rem);font-weight:800;letter-spacing:-.04em;line-height:1;margin-bottom:14px}
.docs-main h2{font-family:var(--disp);font-size:1.8rem;font-weight:800;letter-spacing:-.03em;margin:56px 0 14px;padding-top:24px}
.docs-main h3{font-family:var(--disp);font-size:1.2rem;font-weight:700;margin:28px 0 10px}
.docs-main p{color:var(--ink-dim);margin-bottom:14px;font-size:16px;line-height:1.6}
.docs-main ul{color:var(--ink-dim);margin:8px 0 16px 22px}
.docs-main li{margin:6px 0}
.docs-main code{background:var(--ink);color:var(--lime);padding:2px 8px;font-family:var(--mono);font-size:.85em}
.docs-main a.link{color:var(--ink);border-bottom:2px solid var(--lime);transition:background .2s}
.docs-main a.link:hover{background:var(--lime)}
.endpoint{display:flex;align-items:center;gap:12px;padding:12px 16px;border:var(--bd);background:var(--paper);font-family:var(--mono);font-size:13px;margin:14px 0;box-shadow:var(--sh-hard-sm)}
.method{padding:3px 10px;font-family:var(--mono);font-size:10.5px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;border:var(--bd-1)}
.method.get{background:var(--lime);color:var(--ink)}
.method.post{background:var(--coral);color:var(--ink)}
.method.del{background:var(--ink);color:var(--paper)}
.iflow{display:flex;flex-direction:column;gap:24px;max-width:920px;margin:0 auto}
.iflow .step-big{display:grid;grid-template-columns:64px 1fr;gap:22px;align-items:start;padding:26px;background:var(--paper);border:var(--bd);box-shadow:var(--sh-hard)}
.iflow .sn{
  width:44px;height:44px;background:var(--lime);border:var(--bd);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--disp);font-weight:800;font-size:18px;color:var(--ink);
}
.iflow .sb h3{font-family:var(--disp);font-size:1.25rem;font-weight:700;margin-bottom:6px}

/* ── Language switcher (brutalist re-skin) ── */
.lang{position:relative;display:inline-block}
.lang-cur{
  padding:8px 12px;color:var(--ink);background:var(--paper);
  border:var(--bd-1);font-family:var(--mono);font-size:11.5px;font-weight:600;
  text-transform:uppercase;letter-spacing:.08em;
  cursor:pointer;display:inline-flex;align-items:center;gap:8px;
  transition:background .18s var(--ease);
}
.lang-cur:hover{background:var(--lime)}
.lang-cur .ca{width:8px;height:8px;transition:transform .2s}
.lang.open .lang-cur{background:var(--lime)}
.lang.open .lang-cur .ca{transform:rotate(180deg)}
.lang-menu{
  position:absolute;top:calc(100% + 6px);right:0;min-width:200px;
  background:var(--paper);border:var(--bd);box-shadow:var(--sh-hard);
  padding:0;opacity:0;visibility:hidden;transform:translateY(-4px);
  transition:opacity .2s,transform .2s,visibility .2s;z-index:100;
}
.lang.open .lang-menu{opacity:1;visibility:visible;transform:translateY(0)}
.lang-menu a{
  display:flex;justify-content:space-between;align-items:center;gap:16px;
  padding:11px 14px;font-family:var(--mono);font-size:12px;color:var(--ink-dim);
  letter-spacing:.02em;border-bottom:var(--bd-1);transition:all .15s var(--ease);cursor:pointer;
}
.lang-menu a:last-child{border-bottom:0}
.lang-menu a .code{color:var(--ink-mute);font-size:10.5px;letter-spacing:.14em}
.lang-menu a:hover{background:var(--ink);color:var(--paper)}
.lang-menu a:hover .code{color:var(--lime)}
.lang-menu a.on{background:var(--lime);color:var(--ink)}
.lang-menu a.on .code{color:var(--ink)}
html[dir="rtl"] .lang-menu{right:auto;left:0}

/* ── RTL overrides ── */
html[dir="rtl"] .btn svg{transform:scaleX(-1)}
html[dir="rtl"] pre,html[dir="rtl"] code,html[dir="rtl"] .code-body{direction:ltr;text-align:left}
html[dir="rtl"] .code{direction:ltr}
html[dir="rtl"] .nav-inner{grid-template-columns:auto 1fr auto}

/* ── Responsive ── */
@media(max-width:1040px){
  .grid-3,.grid-2{grid-template-columns:1fr;gap:24px}
  .stats{grid-template-columns:repeat(2,1fr)}
  .stat{border-right:0;border-bottom:var(--bd-1)}
  .stat:nth-child(3),.stat:nth-child(4){border-bottom:0}
  .stat:nth-child(2){border-right:0}
  .stat:nth-child(1),.stat:nth-child(3){border-right:var(--bd-1)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
  .docs-layout{grid-template-columns:1fr;gap:32px}
  .docs-side{position:static;border-right:0;border-bottom:var(--bd-1);padding:0 0 20px}
}
@media(max-width:720px){
  .container{padding:0 20px}
  .nav-links{display:none}
  .nav-toggle{display:flex}
  .nav-right .lang{display:none}
  .section{padding:72px 0}
  .footer-grid{grid-template-columns:1fr;padding:0 20px}
  .colophon{flex-direction:column;gap:10px;padding:20px;text-align:center}
  .cta{padding:48px 24px}
  :root{--sh-hard:4px 4px 0 var(--ink);--sh-hard-sm:3px 3px 0 var(--ink)}
}