:root {
  color-scheme: dark;
  --background: #090a09;
  --foreground: #f0f0ee;
  --muted: #9c9fa3;
  --faint: #797e83;
  --line: #2b2e31;
  --accent: #cbd2d9;
  --brand-accent: #ff8a80;
  --accent-surface: color-mix(in srgb, var(--accent) 3%, var(--background));
  --accent-surface-raised: color-mix(in srgb, var(--accent) 5%, var(--background));
  --accent-border: color-mix(in srgb, var(--accent) 23%, var(--background));
  --accent-border-soft: color-mix(in srgb, var(--accent) 16%, var(--background));
  --accent-text: color-mix(in srgb, var(--accent) 25%, #b6bcc2);
  --accent-muted: color-mix(in srgb, var(--accent) 18%, #8c949c);
  --mono: 'SFMono-Regular', Consolas, 'Liberation Mono', monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 30px; }
body { margin: 0; background: var(--background); color: var(--foreground); font-family: Arial, Helvetica, sans-serif; -webkit-font-smoothing: antialiased; }
::selection { background: var(--accent); color: var(--background); }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; }
button, a { -webkit-tap-highlight-color: transparent; touch-action: manipulation; }
a:focus-visible, button:focus-visible, [tabindex]:focus-visible { outline: 2px solid var(--brand-accent); outline-offset: 6px; }
svg { display: block; width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.5; }
p, h1, h2, h3 { margin: 0; }
.wrap { width: min(1280px, calc(100% - 112px)); margin-inline: auto; }
.mono { font-family: var(--mono); font-size: 11px; letter-spacing: .035em; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
.skip-link { position: fixed; top: 8px; left: 8px; z-index: 10; padding: 14px 20px; color: var(--background); background: var(--accent); transform: translateY(-150%); }
.skip-link:focus { transform: translateY(0); }

.site-header { min-height: 92px; padding-block: 20px; display: flex; align-items: center; justify-content: space-between; gap: 24px; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; flex-shrink: 0; }
.brand-logo { display: block; width: 160px; height: auto; }
.site-header nav { display: flex; align-items: center; gap: 8px; flex-shrink: 0; font-size: 12px; }
.site-header nav a { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 10px 12px; border: 1px solid transparent; border-radius: 4px; color: var(--muted); line-height: 1; white-space: nowrap; transition: color .2s, background .2s, border-color .2s; }
.site-header nav a:hover { color: var(--brand-accent); background: var(--accent-surface-raised); }
.site-header nav .nav-github { color: var(--foreground); border-color: var(--line); background: var(--accent-surface); }
.site-header nav .nav-github:hover { color: var(--brand-accent); border-color: var(--accent-border); }
.site-header nav svg { width: 14px; height: 14px; flex-shrink: 0; }

.hero { padding-top: 34px; padding-bottom: 54px; }
.hero-topline { text-transform: uppercase; color: var(--muted); font-size: 10px; letter-spacing: .075em; }
.hero-topline > span { display: flex; align-items: center; gap: 9px; }
.status-dot { display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); flex-shrink: 0; }
.hero-intro { display: grid; grid-template-columns: 1.1fr 1fr; align-items: end; gap: 80px; padding: 31px 0 0; }
h1 { font-size: clamp(31px, 3.45vw, 49px); line-height: 1.16; font-weight: 500; letter-spacing: -.047em; }
h1 > span { color: var(--muted); }
.hero-description > p { color: var(--muted); font-size: 16px; line-height: 1.65; max-width: 480px; }

.section-space { padding-block: 50px 64px; }
.section-label { text-transform: uppercase; font-size: 10px; font-weight: 400; letter-spacing: .085em; color: var(--brand-accent); }
.integration-section { border-top: 1px solid var(--line); }
.integration-layout { margin-top: 32px; }
.integration-intro { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 32px; margin-bottom: 28px; }
.integration-identity, .integration-links, .integration-demo { min-width: 0; }
.integration-links { text-align: right; }
.integration-logos { display: flex; align-items: center; gap: clamp(20px, 2.4vw, 34px); line-height: 0; letter-spacing: 0; }
.integration-logo { display: block; height: auto; flex-shrink: 0; }
.integration-logo-iyzico { width: clamp(100px, 11.6vw, 160px); }
.integration-logo-mpp { width: clamp(112px, 12.8vw, 176px); }
.integration-cross { --cross-size: clamp(28px, 3vw, 40px); display: grid; place-items: center; width: var(--cross-size); height: var(--cross-size); color: var(--accent-text); flex: 0 0 auto; line-height: 0; letter-spacing: 0; }
.integration-cross svg { width: 100%; height: 100%; fill: currentColor; stroke: none; }
.integration-identity > p { font-size: 15px; line-height: 1.7; color: var(--muted); margin-top: 17px; }
.text-link { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; padding-block: 6px; transition: color .2s; }
.text-link:hover { color: var(--brand-accent); }
.text-link > svg { width: 14px; height: 14px; flex-shrink: 0; fill: currentColor; stroke: none; }
.text-link > span { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 4px; text-decoration-color: var(--faint); transition: text-decoration-color .2s; }
.text-link:hover > span { text-decoration-color: currentColor; }
.integration-meta { margin-top: 7px; color: var(--faint); font-size: 10px; }
.disclaimer-link { display: inline-flex; align-items: center; gap: 4px; color: var(--accent); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; text-decoration-color: var(--accent-border); transition: color .2s, text-decoration-color .2s; }
.disclaimer-link > svg { width: 12px; height: 12px; flex-shrink: 0; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
.disclaimer-link:hover { color: var(--brand-accent); text-decoration-color: currentColor; }

.payment-flow { --packet-duration: 800ms; --hop-color: var(--accent); border: 1px solid var(--accent-border); border-radius: 6px; overflow: hidden; background: var(--background); min-width: 0; }
.payment-flow[data-phase="1"], .payment-flow[data-phase="2"], .payment-flow[data-phase="3"], .payment-flow[data-phase="4"] { --hop-color: var(--brand-accent); }
.payment-flow-top { display: flex; justify-content: space-between; align-items: center; gap: 16px; min-height: 48px; padding: 16px 28px; border-bottom: 1px solid var(--accent-border-soft); background: var(--accent-surface); }
.flow-window-title, .flow-simulation-tag { display: inline-flex; align-items: center; gap: 8px; font-size: 9px; line-height: 1.4; }
.flow-window-title { color: var(--accent-text); }
.flow-window-title > span { width: 6px; height: 6px; border: 1px solid var(--accent); }
.flow-simulation-tag { color: var(--muted); text-transform: uppercase; letter-spacing: .08em; }
.flow-simulation-tag > span { width: 4px; height: 4px; border-radius: 50%; background: var(--brand-accent); }
.payment-stage { position: relative; width: 100%; max-width: 960px; height: 300px; margin-inline: auto; overflow: hidden; isolation: isolate; background-image: radial-gradient(ellipse at 50% 48%, #15181b55, transparent 65%), radial-gradient(circle, #272b2f 0.7px, transparent 0.9px); background-size: 100% 100%, 16px 16px; background-position: center; }
.payment-stage::before { content: ''; position: absolute; inset: 12px; z-index: 1; pointer-events: none; background: linear-gradient(var(--accent-border-soft), var(--accent-border-soft)) left top / 12px 1px, linear-gradient(var(--accent-border-soft), var(--accent-border-soft)) left top / 1px 12px, linear-gradient(var(--accent-border-soft), var(--accent-border-soft)) right top / 12px 1px, linear-gradient(var(--accent-border-soft), var(--accent-border-soft)) right top / 1px 12px, linear-gradient(var(--accent-border-soft), var(--accent-border-soft)) left bottom / 12px 1px, linear-gradient(var(--accent-border-soft), var(--accent-border-soft)) left bottom / 1px 12px, linear-gradient(var(--accent-border-soft), var(--accent-border-soft)) right bottom / 12px 1px, linear-gradient(var(--accent-border-soft), var(--accent-border-soft)) right bottom / 1px 12px; background-repeat: no-repeat; }
.payment-circuit { position: absolute; inset: 0; z-index: 0; width: 100%; height: 100%; overflow: visible; }
.circuit-tracks use { fill: none; stroke: #2c3136; stroke-width: 1; vector-effect: non-scaling-stroke; transition: stroke 80ms; }
.circuit-junctions circle { fill: var(--background); stroke: #41474e; stroke-width: 1; vector-effect: non-scaling-stroke; }
.payment-flow[data-phase="0"] .circuit-tracks .route-request, .payment-flow[data-phase="1"] .circuit-tracks .route-return, .payment-flow[data-phase="2"] .circuit-tracks .route-request, .payment-flow[data-phase="3"] .circuit-tracks .route-charge, .payment-flow[data-phase="4"] .circuit-tracks .route-verified, .payment-flow[data-phase="5"] .circuit-tracks .route-return { stroke: color-mix(in srgb, var(--hop-color) 78%, var(--background)); }
.payment-flow[data-phase="0"] .circuit-junctions circle:nth-child(-n+2), .payment-flow[data-phase="2"] .circuit-junctions circle:nth-child(-n+2), .payment-flow[data-phase="1"] .circuit-junctions circle:nth-child(n+5):nth-child(-n+6), .payment-flow[data-phase="5"] .circuit-junctions circle:nth-child(n+5):nth-child(-n+6), .payment-flow[data-phase="3"] .circuit-junctions circle:nth-child(n+3):nth-child(-n+4), .payment-flow[data-phase="4"] .circuit-junctions circle:nth-child(n+7) { stroke: color-mix(in srgb, var(--hop-color) 65%, var(--background)); }
.circuit-signals .signal { fill: none; color: var(--hop-color); stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-dasharray: 10 100; stroke-dashoffset: 10; vector-effect: non-scaling-stroke; opacity: 0; filter: drop-shadow(0 0 2px currentColor); animation-duration: var(--packet-duration); animation-delay: 0ms; animation-timing-function: linear; animation-iteration-count: 1; animation-fill-mode: both; animation-play-state: paused; }
.payment-flow[data-phase="0"] .signal-request, .payment-flow[data-phase="1"] .signal-challenge, .payment-flow[data-phase="2"] .signal-authorize, .payment-flow[data-phase="3"] .signal-charge, .payment-flow[data-phase="4"] .signal-verified, .payment-flow[data-phase="5"] .signal-receipt { animation-name: circuit-packet; }
.payment-flow[data-playing="true"] .circuit-signals .signal { animation-play-state: running; }
.flow-wire-label { position: absolute; z-index: 2; top: 42px; left: 33.3333%; transform: translateX(-50%); display: flex; align-items: center; gap: 7px; min-height: 22px; padding: 5px 9px; border: 1px solid color-mix(in srgb, var(--hop-color) 28%, var(--background)); border-radius: 3px; background: var(--background); color: var(--hop-color); font-size: 9px; line-height: 1.2; letter-spacing: .08em; white-space: nowrap; transition: left 180ms ease, color 120ms, border-color 120ms; }
.flow-wire-label::after { content: '→'; font-size: 12px; line-height: 1; letter-spacing: 0; }
.payment-flow[data-phase="3"] .flow-wire-label, .payment-flow[data-phase="4"] .flow-wire-label { left: 66.6667%; }
.payment-flow[data-phase="1"] .flow-wire-label::after, .payment-flow[data-phase="4"] .flow-wire-label::after, .payment-flow[data-phase="5"] .flow-wire-label::after { content: '←'; }
.payment-node { position: absolute; z-index: 2; top: 48%; width: 0; height: 0; text-align: center; }
.node-agent { left: 16.6667%; }
.node-merchant { left: 50%; }
.node-provider { left: 83.3333%; }
.node-body { position: absolute; left: 0; top: 0; display: flex; align-items: center; justify-content: center; width: 62px; height: 62px; transform: translate(-50%, -50%); border: 1px solid #41474e; border-radius: 50%; background: #101214; color: var(--accent); box-shadow: 0 0 0 5px var(--background); transition: border-color 120ms, color 120ms; }
.node-body::before { content: ''; position: absolute; inset: -6px; border: 1px solid var(--accent-border-soft); border-radius: inherit; opacity: .35; animation-duration: var(--packet-duration); animation-timing-function: ease-out; animation-iteration-count: 1; animation-fill-mode: both; animation-play-state: paused; }
.node-agent-icon { font: 17px var(--mono); letter-spacing: -.08em; padding-right: 2px; }
.node-provider-icon { font: 25px Arial, Helvetica, sans-serif; }
.node-merchant .node-body { width: 92px; height: 76px; border-radius: 8px; background: linear-gradient(145deg, #1a1e22, #101214 65%); }
.node-merchant .node-body::after { content: ''; position: absolute; inset: 12px -5px; border-inline: 2px dotted #626a73; pointer-events: none; }
.node-merchant img { display: block; width: 64px; height: auto; transform: translateY(-5px); }
.node-label, .node-detail { position: absolute; left: 0; transform: translateX(-50%); width: max-content; max-width: 100px; padding-inline: 3px; background: var(--background); white-space: nowrap; }
.node-label { top: 51px; color: var(--foreground); font-size: 12px; line-height: 1.5; }
.node-detail { top: 72px; color: var(--muted); font-size: 9px; line-height: 1.5; letter-spacing: .025em; }
.merchant-ledger { position: absolute; left: 50%; bottom: 10px; transform: translateX(-50%); display: flex; align-items: end; gap: 3px; height: 8px; }
.merchant-ledger > i { display: block; width: 3px; height: 4px; background: #545d66; transform-origin: bottom; transition: background .3s; animation-duration: var(--packet-duration); animation-iteration-count: 1; animation-fill-mode: both; animation-play-state: paused; }
.merchant-ledger > i:nth-child(2) { height: 6px; animation-delay: 70ms; }
.merchant-ledger > i:nth-child(3) { height: 8px; animation-delay: 140ms; }
.payment-flow[data-phase="0"] .node-agent .node-body, .payment-flow[data-phase="1"] .node-merchant .node-body, .payment-flow[data-phase="2"] .node-agent .node-body, .payment-flow[data-phase="3"] .node-merchant .node-body, .payment-flow[data-phase="4"] .node-provider .node-body, .payment-flow[data-phase="5"] .node-merchant .node-body { border-color: color-mix(in srgb, var(--hop-color) 35%, #41474e); }
.payment-flow[data-phase="0"] .node-merchant .node-body, .payment-flow[data-phase="1"] .node-agent .node-body, .payment-flow[data-phase="2"] .node-merchant .node-body, .payment-flow[data-phase="3"] .node-provider .node-body, .payment-flow[data-phase="4"] .node-merchant .node-body, .payment-flow[data-phase="5"] .node-agent .node-body { border-color: color-mix(in srgb, var(--hop-color) 72%, #41474e); }
.payment-flow[data-phase="0"] .node-merchant .node-body::before, .payment-flow[data-phase="1"] .node-agent .node-body::before, .payment-flow[data-phase="2"] .node-merchant .node-body::before, .payment-flow[data-phase="3"] .node-provider .node-body::before, .payment-flow[data-phase="4"] .node-merchant .node-body::before, .payment-flow[data-phase="5"] .node-agent .node-body::before { border-color: var(--hop-color); animation-name: node-arrival; }
.payment-flow[data-phase="3"] .node-provider .node-body, .payment-flow[data-phase="4"] .node-provider .node-body { color: var(--brand-accent); }
.payment-flow[data-playing="true"] .node-body::before { animation-play-state: running; }
.payment-flow[data-phase="2"] .merchant-ledger > i { background: var(--brand-accent); animation-name: ledger-write; }
.payment-flow[data-phase="3"] .merchant-ledger > i, .payment-flow[data-phase="4"] .merchant-ledger > i, .payment-flow[data-phase="5"] .merchant-ledger > i { background: var(--accent); }
.payment-flow[data-playing="true"] .merchant-ledger > i { animation-play-state: running; }
.flow-readout { display: flex; justify-content: space-between; align-items: center; gap: 20px; min-height: 78px; padding: 18px 28px; border-top: 1px solid var(--accent-border-soft); background: var(--accent-surface); }
.flow-readout-copy { min-width: 0; display: grid; gap: 5px; }
.flow-readout-copy strong { font-size: 13px; line-height: 1.35; font-weight: 500; }
.flow-readout-copy > span { font-size: 9px; line-height: 1.5; letter-spacing: .015em; color: var(--muted); overflow-wrap: anywhere; }
.flow-amount { flex-shrink: 0; display: flex; align-items: baseline; gap: 6px; }
.flow-amount strong { font-size: 23px; font-weight: 400; font-variant-numeric: tabular-nums; letter-spacing: -.045em; }
.flow-amount > span { font-size: 9px; color: var(--muted); }
.simulation-note { text-align: right; margin-top: 12px; color: var(--muted); font-size: 10px; line-height: 1.7; }

@keyframes circuit-packet {
  from { opacity: 1; stroke-dashoffset: 10; }
  to { opacity: 1; stroke-dashoffset: -100; }
}
@keyframes node-arrival {
  0%, 78% { opacity: 0; transform: scale(.97); }
  90% { opacity: 1; transform: scale(1.035); }
  100% { opacity: .35; transform: scale(1.08); }
}
@keyframes ledger-write {
  0%, 15% { transform: scaleY(.35); }
  30%, 100% { transform: scaleY(1); }
}

.site-footer { border-top: 1px solid var(--line); padding-block: 28px; }
.footer-main { display: flex; align-items: center; flex-wrap: wrap; gap: 20px; }
.footer-main > p { font: 10px/1.6 var(--mono); color: var(--muted); }
.footer-links { display: flex; gap: 24px; margin-left: auto; font-size: 11px; }
.footer-links a { padding-block: 6px; color: var(--accent); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; text-decoration-color: var(--accent-border); }
.footer-links a:hover { color: var(--brand-accent); text-decoration-color: currentColor; }
.footer-bottom { margin-top: 18px; }
.footer-bottom p { color: var(--faint); font-size: 10px; line-height: 1.7; max-width: 760px; }


@media (max-width: 1150px) {
  .wrap { width: calc(100% - 72px); }
  .hero-intro { gap: 45px; }
}

@media (max-width: 800px) {
  .wrap { width: calc(100% - 48px); }
  .site-header { min-height: 84px; padding-block: 18px; }
  .hero { padding-top: 29px; padding-bottom: 42px; }
  .hero-intro { gap: 28px; padding-block: 28px 0; }
  h1 { font-size: 31px; }
  .hero-description > p { font-size: 14px; }
  .section-space { padding-block: 40px 48px; }
  .integration-layout { margin-top: 28px; }
  .integration-intro { gap: 24px; }
}

@media (max-width: 600px) {
  .wrap { width: calc(100% - 40px); }
  .site-header { min-height: 80px; padding-block: 16px; gap: 12px; }
  .brand-logo { width: 144px; }
  .site-header nav { gap: 6px; font-size: 11px; }
  .site-header nav a { padding-inline: 4px; gap: 6px; }
  .site-header nav svg { width: 12px; height: 12px; }
  .hero { padding-top: 25px; padding-bottom: 34px; }
  .hero-topline { font-size: 9px; }
  .hero-intro { grid-template-columns: minmax(0, 1fr); gap: 18px; padding-block: 26px 0; }
  h1 { font-size: clamp(29px, 7.2vw, 43px); }
  .hero-description > p { font-size: 14px; }
  .section-space { padding-block: 34px 40px; }
  .integration-layout { margin-top: 25px; }
  .integration-intro { grid-template-columns: minmax(0, 1fr); gap: 17px; margin-bottom: 22px; }
  .integration-identity > p { font-size: 14px; margin-top: 15px; }
  .integration-links { text-align: left; }
  .integration-links .text-link { font-size: 12px; }
  .integration-meta { margin-top: 3px; }
  .payment-flow-top { padding-inline: 15px; gap: 10px; }
  .flow-window-title, .flow-simulation-tag { font-size: 8px; gap: 6px; }
  .payment-stage { height: 280px; }
  .payment-stage::before { inset: 10px; }
  .flow-wire-label { top: 36px; font-size: 8px; }
  .node-body { width: 46px; height: 46px; box-shadow: 0 0 0 4px var(--background); }
  .node-merchant .node-body { width: 72px; height: 64px; }
  .node-merchant img { width: 54px; }
  .node-agent-icon { font-size: 15px; }
  .node-provider-icon { font-size: 23px; }
  .node-label { top: 43px; font-size: 10px; }
  .node-detail { top: 60px; font-size: 8px; }
  .flow-readout { padding-inline: 15px; gap: 10px; }
  .flow-readout-copy strong { font-size: 12px; }
  .flow-readout-copy > span { font-size: 8px; }
  .flow-amount { gap: 4px; }
  .flow-amount strong { font-size: 20px; }
  .flow-amount > span { font-size: 8px; }
  .simulation-note { text-align: left; font-size: 9px; }
  .site-footer { padding-block: 24px; }
  .footer-main { display: block; }
  .footer-links { margin: 14px 0 0; }
  .footer-bottom { margin-top: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .payment-flow .signal { display: none; }
}