:root{--bg-1:#f7f1e5;--bg-2:#efe6d4;--panel:rgba(255,252,247,.92);--ink:#201a15;--muted:#6b6258;--line:rgba(131,108,82,.18);--accent:#0d684f;--accent-strong:#083d34;--accent-soft:rgba(13,104,79,.08);--good:#1b8f5a;--bad:#b03c2e;--shadow:0 30px 70px rgba(43,30,18,.1)}*{box-sizing:border-box}body{margin:0;color:var(--ink);background:radial-gradient(circle at top left,hsla(0,0%,100%,.95),transparent 28%),radial-gradient(circle at bottom right,rgba(13,104,79,.08),transparent 24%),linear-gradient(145deg,var(--bg-1),var(--bg-2));font-family:IBM Plex Sans,Avenir Next,Segoe UI,sans-serif;font-size:15px;line-height:1.45}main{min-height:100vh}.shell{max-width:1180px;margin:0 auto;padding:26px 18px 44px}.shell-embedded{max-width:none;padding:0}.checkout-grid{display:grid;grid-gap:22px;gap:22px}.checkout-stage{display:grid;grid-gap:16px;gap:16px;margin-bottom:18px;padding:18px 20px 22px;border:1px solid rgba(131,108,82,.12);border-radius:28px;background:radial-gradient(circle at top right,rgba(13,104,79,.12),transparent 28%),linear-gradient(180deg,hsla(0,0%,100%,.72),rgba(255,250,243,.6));box-shadow:0 18px 40px rgba(43,30,18,.06)}.checkout-stage__copy{display:grid;grid-gap:8px;gap:8px}.checkout-stage__copy h1{margin:0;font-family:Iowan Old Style,Palatino Linotype,Book Antiqua,Georgia,serif;font-size:clamp(1.55rem,2.8vw,2.4rem);line-height:1.02;letter-spacing:-.035em}.checkout-stage__copy p{max-width:56rem;margin:0}.checkout-stage__meta{display:flex;gap:10px;flex-wrap:wrap}.checkout-stage__pill{display:inline-flex;align-items:center;padding:8px 12px;border-radius:999px;background:rgba(13,104,79,.08);border:1px solid rgba(13,104,79,.12);color:var(--accent-strong);font-size:.82rem;font-weight:700}.checkout-grid-embedded{grid-template-columns:1fr}@media (min-width:920px){.checkout-grid{grid-template-columns:minmax(0,1.18fr) minmax(320px,.82fr);align-items:start}}.panel{background:var(--panel);border:1px solid var(--line);border-radius:24px;padding:24px;box-shadow:var(--shadow);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.stack{display:grid;grid-gap:14px;gap:14px}.hero{display:grid;grid-gap:10px;gap:10px}.hero h2{margin:0;font-family:Iowan Old Style,Palatino Linotype,Book Antiqua,Georgia,serif;font-size:clamp(1.35rem,2.1vw,1.85rem);line-height:1.05;letter-spacing:-.03em}.hero p{margin:0}.hero-form{padding-bottom:6px;border-bottom:1px solid rgba(131,108,82,.12)}.hero-topline{display:flex;justify-content:space-between;gap:12px;align-items:center;flex-wrap:wrap}.hero-summary{padding:4px 0 6px}.stack-tight{display:grid;grid-gap:4px;gap:4px}.eyebrow{font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;font-weight:700}.eyebrow,.muted{color:var(--muted)}.muted{font-size:.94rem}.button{display:inline-flex;justify-content:center;align-items:center;text-decoration:none;border:0;border-radius:999px;padding:12px 18px;background:linear-gradient(135deg,var(--accent),var(--accent-strong));color:#fff;cursor:pointer;font-weight:700;font-size:.92rem;transition:transform .16s ease,box-shadow .16s ease,opacity .16s ease}.button:hover{transform:translateY(-1px);box-shadow:0 12px 24px rgba(8,61,52,.18)}.button-secondary{background:hsla(0,0%,100%,.76);color:var(--ink);border:1px solid var(--line);box-shadow:none}.field{display:grid;grid-gap:8px;gap:8px}.field input,.field select{width:100%;padding:12px 14px;border-radius:16px;border:1px solid var(--line);background:hsla(0,0%,100%,.94);color:var(--ink);font:inherit;transition:border-color .16s ease,box-shadow .16s ease,transform .16s ease}.field input:focus,.field select:focus{outline:none;border-color:rgba(13,104,79,.44);box-shadow:0 0 0 4px rgba(13,104,79,.1)}.field-grid{display:grid;grid-gap:12px;gap:12px}@media (min-width:720px){.field-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}.input-cluster{display:grid;grid-gap:12px;gap:12px}@media (min-width:720px){.input-cluster{grid-template-columns:repeat(2,minmax(0,1fr))}}.summary-row{justify-content:space-between;flex-wrap:wrap}.merchant-brand,.summary-row{display:flex;gap:12px;align-items:center}.merchant-brand{margin-bottom:4px}.merchant-brand-hero{padding:14px 16px;border-radius:22px;background:linear-gradient(135deg,rgba(13,104,79,.08),rgba(8,61,52,.04));border:1px solid rgba(13,104,79,.12)}.merchant-logo{width:48px;height:48px;border-radius:16px;object-fit:cover;border:1px solid var(--line);background:#fff}.merchant-logo-fallback{justify-content:center;align-items:center;background:#e7f3ee}.merchant-logo-fallback,.status-badge{display:inline-flex;font-weight:700;color:var(--accent-strong)}.status-badge{padding:7px 12px;border-radius:999px;border:1px solid rgba(13,104,79,.16);background:rgba(13,104,79,.08)}.button-row{display:flex;gap:10px;flex-wrap:wrap}.card-helper{padding:18px;border:1px solid rgba(13,104,79,.12);border-radius:24px;background:linear-gradient(180deg,hsla(0,0%,100%,.9),hsla(39,58%,95%,.84))}.status-error{color:var(--bad)}.security-pill{display:inline-flex;align-items:center;padding:7px 12px;border-radius:999px;background:rgba(13,104,79,.1);color:var(--accent-strong);font-size:.72rem;font-weight:700}.helper-header{display:flex;justify-content:space-between;gap:12px;align-items:flex-start;flex-wrap:wrap}.helper-header strong{display:block;margin-top:4px}.helper-caption{color:var(--muted)}.scenario-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));grid-gap:10px;gap:10px}.scenario-card{display:grid;grid-gap:8px;gap:8px;text-align:left;padding:12px 14px;border-radius:16px;border:1px solid rgba(131,108,82,.14);background:hsla(0,0%,100%,.88);color:var(--ink);cursor:pointer;transition:transform .14s ease,border-color .14s ease,box-shadow .14s ease}.scenario-card:hover{transform:translateY(-1px);border-color:rgba(13,104,79,.26);box-shadow:0 10px 24px rgba(24,20,15,.08)}.scenario-card small{color:var(--muted);font-size:.78rem}.scenario-card-active{border-color:rgba(13,104,79,.34);background:linear-gradient(180deg,rgba(13,104,79,.12),hsla(0,0%,100%,.92));box-shadow:0 14px 28px rgba(13,104,79,.12)}.section-heading{display:grid;grid-gap:4px;gap:4px}.section-heading p{margin:0}.field-code{font-family:SFMono-Regular,Menlo,monospace;letter-spacing:.05em}.action-row{display:flex;gap:12px;flex-wrap:wrap}.action-row .button{min-width:180px}.summary-total{display:grid;grid-gap:8px;gap:8px;padding:18px 20px;border-radius:24px;background:linear-gradient(135deg,rgba(8,61,52,.96),rgba(13,104,79,.9));color:#fff}.summary-total strong{font-size:clamp(1.2rem,2vw,1.65rem);line-height:1}.summary-total .eyebrow{color:hsla(0,0%,100%,.72)}.detail-list{display:grid;grid-gap:14px;gap:14px;padding:4px 0}.detail-item{display:flex;justify-content:space-between;gap:14px;align-items:center;padding-bottom:14px;border-bottom:1px solid rgba(131,108,82,.12)}.detail-item:last-child{padding-bottom:0;border-bottom:0}.detail-item span:last-child{text-align:right}.summary-note{display:grid;grid-gap:6px;gap:6px;padding:18px 20px;border-radius:22px;background:hsla(0,0%,100%,.7);border:1px solid rgba(131,108,82,.14)}.summary-note strong{font-size:.98rem}