/* The Visa Agentic Commerce Benchmark page shell. One stylesheet for layout, type and shared
   components, using the Visa Payments Frontier article tokens. Interactive
   modules keep their own files; components.css aligns them to this system. */

@font-face{font-family:"Visa Sans";src:url(assets/visa-sans-400.woff2) format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:"Visa Sans";src:url(assets/visa-sans-500.woff2) format("woff2");font-weight:500;font-display:swap}
@font-face{font-family:"Visa Sans";src:url(assets/visa-sans-600.woff2) format("woff2");font-weight:600;font-display:swap}
@font-face{font-family:"Visa Sans";src:url(assets/visa-sans-700.woff2) format("woff2");font-weight:700;font-display:swap}
@font-face{font-family:"Space Mono";src:url(assets/space-mono-400.woff2) format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:"Space Mono";src:url(assets/space-mono-700.woff2) format("woff2");font-weight:700;font-display:swap}

:root{
  /* Frontier article tokens */
  --ground:#1e1e1e;--panel:#1e1e1e;--panel2:#303030;--panel3:#232323;
  --ink:#b9b4ae;--ink-strong:#d9d5d0;--white:#fff;--muted:#9a958f;
  --blue:#1434cb;--blue-hover:#2b3fe0;--light-blue:#c7edff;--glow:#2b94f5;
  --gold:#f2cf7a;--salmon:#e48080;
  --line:rgba(255,255,255,.12);--line-strong:rgba(255,255,255,.22);
  --card:#262626;--card-raised:#2c2c2c;
  --display:"Visa Sans","Inter",system-ui,sans-serif;--mono:"Space Mono","JetBrains Mono",ui-monospace,monospace;
  --page:1440px;--wrap:1200px;--margin:clamp(20px,5vw,72px);
  --radius:12px;--radius-lg:20px;
  --section:clamp(64px,8vw,112px);
  color-scheme:dark;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}}
body{margin:0;background:var(--ground);color:var(--ink);font:400 17px/1.55 var(--display);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img,svg,canvas{display:block;max-width:100%}
a{color:inherit}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;color:var(--white);font-family:var(--display);letter-spacing:-.02em}
p{margin:0}
[hidden]{display:none!important}
.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip-link{position:absolute;left:16px;top:-60px;z-index:100;background:var(--white);color:#111;padding:10px 16px;border-radius:8px;font-weight:600;text-decoration:none}
.skip-link:focus{top:12px}
:focus-visible{outline:2px solid var(--light-blue);outline-offset:3px;border-radius:4px}

/* Layout */
.wrap{width:100%;max-width:calc(var(--wrap) + 2 * var(--margin));margin:0 auto;padding:0 var(--margin)}
.section{padding:var(--section) 0;border-top:1px solid var(--line)}
.section--grey{background:var(--panel2);border-top-color:transparent;--muted:#aca7a1}
.section--deep{background:#171717}

/* Type */
.eyebrow,.section-head p.eyebrow{font:400 13px/1.6 var(--mono);letter-spacing:1.8px;text-transform:uppercase;color:var(--ink);max-width:none}
.eyebrow b{font-weight:400;color:var(--gold)}
.section-head{display:grid;grid-template-columns:minmax(0,1fr);gap:16px;max-width:760px;margin-bottom:clamp(36px,4vw,56px)}
.section-head h2{font-weight:600;font-size:clamp(30px,3.2vw,46px);line-height:1.08}
.section-head p{font-size:18px;line-height:1.55;color:var(--ink);max-width:64ch}
.prose p{max-width:64ch;font-size:17px;line-height:1.6}
.prose p+p{margin-top:14px}
.prose strong{color:var(--white);font-weight:600}
.lead{font-size:clamp(18px,1.6vw,21px);line-height:1.5;color:var(--ink-strong)}
.small{font-size:14px;line-height:1.5;color:var(--muted)}
.note{font-size:13px;line-height:1.55;color:var(--muted);max-width:80ch}

/* Buttons and links */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:46px;padding:11px 22px;border-radius:999px;border:1px solid transparent;font:600 15px/1.2 var(--display);text-decoration:none;cursor:pointer;transition:background-color .18s,border-color .18s,color .18s}
.btn-primary{background:var(--blue);color:var(--white)}
.btn-primary:hover{background:var(--blue-hover)}
.btn-ghost{background:transparent;color:var(--white);border-color:var(--line-strong)}
.btn-ghost:hover{border-color:var(--white)}
.btn[disabled]{opacity:.55;cursor:not-allowed}
.text-link{color:var(--white);text-decoration:underline;text-decoration-color:rgba(255,255,255,.35);text-underline-offset:5px}
.text-link:hover{text-decoration-color:var(--gold);color:var(--gold)}
.arrow::after{content:"→";font-weight:400}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(18,18,18,.7);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:64px}
.brand{display:inline-flex;align-items:center;background:#fafafa;border-radius:999px;padding:9px 16px;line-height:0}
.brand img{width:150px;height:auto}
.site-nav{display:flex;align-items:center;gap:6px}
.site-nav a{font:500 14px/1 var(--display);color:var(--ink);text-decoration:none;padding:10px 12px;border-radius:8px}
.site-nav a:hover{color:var(--white)}
.site-nav a[aria-current=true]{color:var(--white)}
.site-nav .btn{min-height:38px;padding:8px 16px;font-size:14px;margin-left:6px}
@media (max-width:1020px){.site-nav a:not(.btn){display:none}}
@media (max-width:640px){.brand img{width:120px}}

/* Cards */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
@media (max-width:960px){.grid-3,.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:640px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}}

/* Tables */
.data-table{width:100%;border-collapse:collapse;font-size:15px}
.data-table th{font:400 12px/1.4 var(--mono);letter-spacing:1.2px;text-transform:uppercase;color:var(--muted);text-align:left;padding:10px 12px;border-bottom:1px solid var(--line-strong)}
.data-table td{padding:14px 12px;border-bottom:1px solid var(--line);color:var(--ink-strong);vertical-align:top}
.data-table td.num,.data-table th.num{text-align:right;font-variant-numeric:tabular-nums}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}

/* Forms */
.field{display:grid;gap:8px;margin-bottom:20px}
.field label{font:400 12px/1.4 var(--mono);letter-spacing:1.2px;text-transform:uppercase;color:var(--ink)}
.field input,.field select,.field textarea{width:100%;min-height:48px;padding:12px 14px;background:var(--panel3);border:1px solid var(--line-strong);border-radius:10px;color:var(--white);font-size:16px}
.field input::placeholder{color:#8f8a85}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--light-blue);outline:none}
.field [aria-invalid=true]{border-color:var(--salmon)}
.field-hint{font-size:13px;color:var(--muted)}
.field-error{font-size:13px;font-weight:600;color:#ffb3b3}
.field-error:empty{display:none}

/* Footer */
.site-footer{border-top:1px solid var(--line);padding:40px 0 48px;background:#171717}
.site-footer .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px}
.footer-links{display:flex;flex-wrap:wrap;gap:8px 20px;font-size:13px}
.footer-links a{color:var(--ink);text-decoration:none}
.footer-links a:hover{color:var(--white)}
.footer-links img{display:inline-block;vertical-align:middle;margin-left:6px}
.copyright{font-size:13px;color:var(--muted)}
/* Legal's disclaimers (5 Nov), in legal's words: a slim panel before the footer with three short items side by side,
   one column on narrow screens. The trademark line, in the footer since 3 Nov, is its third item. Inside the Frontier
   host the panel closes the page (article.css). */
.about-xp{border-top:1px solid var(--line);padding:36px 0 40px;background:#171717}
.about-xp-title{margin:0 0 20px;font:400 12px/1.4 var(--mono);letter-spacing:1.6px;text-transform:uppercase;color:var(--ink-strong)}
.about-xp-items{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px 40px;margin:0}
.about-xp-items dt{margin:0 0 8px;font:400 11px/1.4 var(--mono);letter-spacing:1.4px;text-transform:uppercase;color:var(--white)}
.about-xp-items dd{margin:0;font-size:13px;line-height:1.55;color:var(--muted)}
@media (max-width:900px){.about-xp-items{grid-template-columns:minmax(0,1fr);gap:20px}}