.merchant-preview{margin:0;background:#f5f5ef}.merchant-preview .skip-link{position:absolute;left:16px;top:-80px;z-index:99;background:#d9f293;color:#18271f;padding:14px 22px}.merchant-preview .skip-link:focus{top:10px}.preview-header{box-sizing:border-box;max-width:1440px;min-height:94px;padding:14px 5.6%;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:28px;font:500 13px/1.4 Arial,sans-serif;color:#25372e}.preview-header .brand{display:flex;align-items:center;gap:18px;text-decoration:none;color:inherit;font-weight:700;letter-spacing:.12em}.preview-header .brand img{display:block;object-fit:contain;width:96px;height:48px}.preview-header .brand span{padding-left:18px;border-left:1px solid #b7beb0}.preview-header nav{display:flex;gap:30px}.preview-header nav a{text-decoration:none;color:inherit;padding:12px 0}.preview-header nav a:hover{text-decoration:underline;text-underline-offset:5px}.preview-header 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#68892c;outline-offset:4px}#merchant-lab .hero :focus-visible,#merchant-lab .code-panel :focus-visible,#merchant-lab .download-feature :focus-visible{outline-color:#dcf599}#merchant-lab .hero{max-width:1440px;margin:auto;padding:72px 5.6% 58px;background:#25372e;color:#f4f6ec;display:grid;grid-template-columns:1.08fr 1fr;gap:6.8%;position:relative;overflow:hidden}#merchant-lab .eyebrow{font-size:10px;line-height:1.6;letter-spacing:.15em;font-weight:700;display:flex;align-items:center;gap:9px}#merchant-lab .hero .eyebrow{color:#c8d1be}#merchant-lab .square-dot{width:7px;height:7px;background:#dcf599;display:inline-block}#merchant-lab .muted-divider{opacity:.45;padding:0 3px}#merchant-lab h1{font-weight:500;font-size:clamp(48px,5.25vw,78px);line-height:1.035;letter-spacing:-.055em;padding-top:23px}#merchant-lab .hero-lede{font-size:22px;line-height:1.35;letter-spacing:-.02em;margin-top:25px;color:#e8eddf}#merchant-lab 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span+span{border-left:1px solid #56634f;margin-left:16px;padding-left:16px}#merchant-lab .hero-visual{align-self:center;width:100%;padding:24px;background:#2c4034;border:1px solid #4a5a48;border-radius:6px;box-shadow:0 24px 70px #14261c45;position:relative}#merchant-lab .trace-top{display:flex;justify-content:space-between;color:#c1cdb9;gap:20px;font-size:8px;font-weight:700;letter-spacing:.14em}#merchant-lab .trace-mode{display:flex;gap:6px;align-items:center;color:#dcf599}#merchant-lab .trace-mode i,#merchant-lab .live-indicator i{width:5px;height:5px;border-radius:50%;background:currentColor}#merchant-lab .trace-origin{margin-top:22px;padding:19px 0;border-top:1px solid #50604c;border-bottom:1px solid #50604c;display:flex;align-items:center;gap:14px}#merchant-lab .trace-icon{width:38px;height:38px;border-radius:50%;background:#dcf599;color:#25372e;display:grid;place-items:center;font-size:24px}#merchant-lab .trace-origin small,#merchant-lab .trace-terminal 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a{white-space:nowrap;text-decoration:none}#merchant-lab .chapter-nav{display:flex;max-width:1280px;margin:auto;padding:22px 0;border-bottom:1px solid #d7dccf;gap:50px;font-size:11px}#merchant-lab .chapter-nav a{text-decoration:none}#merchant-lab .chapter-nav span{color:#78856e;margin-right:9px;font:10px monospace}#merchant-lab .section{max-width:1280px;margin:auto;padding:68px 0;scroll-margin-top:24px}#merchant-lab .section-heading{display:flex;gap:48px;align-items:end;justify-content:space-between;margin-bottom:34px}#merchant-lab .section-heading .eyebrow{color:#69775e;margin-bottom:12px}#merchant-lab h2{font-weight:500;letter-spacing:-.045em;line-height:1.13;font-size:38px}#merchant-lab .section-heading>p{font-size:12px;color:#5c6959;width:345px;line-height:1.8}#merchant-lab .login-callout{border:1px solid #c8d4b6;background:#edf2e4;padding:20px 24px;display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:20px;border-radius:4px}#merchant-lab .login-callout strong{font-size:13px;font-weight:600}#merchant-lab .login-callout p{font-size:11px;color:#65725c;margin-top:3px}#merchant-lab .workspace-grid{display:grid;grid-template-columns:.78fr 1.22fr;gap:20px;align-items:stretch}#merchant-lab .panel{background:#fcfcf8;border:1px solid #d7dccf;border-radius:4px;padding:26px;min-width:0}#merchant-lab .panel-heading{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:11px}#merchant-lab h3{font-size:16px;font-weight:600;letter-spacing:-.02em}#merchant-lab .tag{display:inline-block;font-size:7px;letter-spacing:.1em;line-height:1.7;font-weight:700;padding:4px 7px;border:1px solid #d2dbc6;border-radius:2px;white-space:nowrap;color:#506244}#merchant-lab .small-copy{font-size:11px;line-height:1.7;color:#64715c}#merchant-lab .field-label{font-size:10px;font-weight:600;display:block;margin:18px 0 7px;line-height:1.5}#merchant-lab select,#merchant-lab input{background:#fff;border:1px solid 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.order-panel>.text-button{display:block;margin:4px auto}#merchant-lab .micro-copy{font-size:9px;color:#67745f;line-height:1.8}#merchant-lab .operation-detail{border-top:1px solid #d8dfcd;padding-top:12px;margin-top:16px;font-size:9px}#merchant-lab summary{cursor:pointer}#merchant-lab .operation-detail code{display:block;font-size:9px;overflow-wrap:anywhere;margin:11px 0}#merchant-lab .live-indicator{color:#55713a;display:flex;gap:7px;align-items:center;font-size:7px;font-weight:700;letter-spacing:.1em}#merchant-lab .state-grid{display:grid;grid-template-columns:repeat(3,1fr);background:#f2f4eb;border:1px solid #dce2d0;border-radius:3px;padding:18px 0;margin:20px 0}#merchant-lab .state-grid>div{padding:0 17px}#merchant-lab .state-grid>div+div{border-left:1px solid #d5deca}#merchant-lab .state-grid span{display:block;font-size:9px;color:#617257}#merchant-lab .state-grid strong{display:block;font-size:13px;line-height:1.5;margin-top:5px;font-weight:600}#merchant-lab .state-grid .state-success{color:#3c651f}#merchant-lab .empty-ledger{display:flex;min-height:300px;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:35px 30px}#merchant-lab .empty-ledger-symbol{display:grid;place-items:center;width:60px;height:60px;border-radius:50%;background:#edf1e2;border:1px solid #d8e0ca;color:#79876a;font:40px/1 Georgia,serif;margin-bottom:18px}#merchant-lab .empty-ledger h4{font-size:15px;font-weight:500}#merchant-lab .empty-ledger p{margin-top:8px;max-width:250px;font-size:11px;color:#697660}#merchant-lab .ledger-facts{display:grid;grid-template-columns:1fr 1fr;gap:10px 24px;margin:0 0 20px;font-size:10px}#merchant-lab .ledger-facts>div{display:flex;justify-content:space-between;gap:12px;border-bottom:1px solid #e5e9de;padding-bottom:7px}#merchant-lab .ledger-facts dt{color:#687560}#merchant-lab .ledger-facts dd{margin:0;text-align:right;font-size:10px}#merchant-lab .mono{font-family:monospace}#merchant-lab 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.feedback{display:flex;gap:14px;padding:18px 21px;border:1px solid #ccd7bc;background:#edf2e2;border-radius:3px;margin-top:18px;font-size:11px;line-height:1.7}#merchant-lab .feedback-symbol{font-size:19px;line-height:1.4;color:#637d46}#merchant-lab .feedback-error{border-color:#d6bd9e;background:#f4ebe0}#merchant-lab .feedback-error [role=alert]{color:#874c24;margin-bottom:3px}#merchant-lab .detail-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:20px;margin-top:20px}#merchant-lab .event-list{margin:0;padding:0;list-style:none}#merchant-lab .event-list li{display:flex;gap:12px;align-items:center;padding:14px 0;border-top:1px solid #e1e7d7}#merchant-lab .event-index{font:11px monospace;color:#7c8d6e}#merchant-lab .event-list strong{display:block;font-size:10px;font-weight:500}#merchant-lab .event-list small{display:block;font:8px/1.6 monospace;color:#68775d}#merchant-lab .event-state{font-size:8px;margin-left:auto;padding:3px 8px;border-radius:3px;background:#f3ebda}#merchant-lab .event-state.processed{background:#e4eed7;color:#47632d}#merchant-lab .refund-input{display:grid;grid-template-columns:.7fr 1fr;gap:10px;align-items:center}#merchant-lab .refund-panel .micro-copy{margin-top:12px}#merchant-lab .architecture-section{border-top:1px solid #d7dccf}#merchant-lab .architecture-figure{padding:25px 30px 18px;border:1px solid #d5dfc7;border-radius:4px;background:#edf2e3}#merchant-lab .architecture-figure img{display:block;width:100%;height:auto}#merchant-lab figcaption{border-top:1px solid #cedabd;padding-top:17px;margin-top:16px;font-size:9px;color:#67765c}#merchant-lab figcaption span{margin-right:18px;font-family:monospace}#merchant-lab .principles{display:grid;grid-template-columns:repeat(3,1fr);gap:36px;margin-top:32px}#merchant-lab .principles article{border-left:1px solid #cdd8be;padding-left:18px}#merchant-lab .principles article>span{font:10px monospace;color:#758666}#merchant-lab .principles h3{margin-top:6px}#merchant-lab .principles p{font-size:11px;color:#617255;line-height:1.8;margin-top:7px}#merchant-lab .scope-note{margin-top:24px;padding:13px 17px;background:#e9eedf;border-left:2px solid #a1b780;font-size:10px;color:#5f7052}#merchant-lab .tutorial-section{border-top:1px solid #d7dccf}#merchant-lab .build-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:45px}#merchant-lab .build-steps{margin:0;padding:0;list-style:none}#merchant-lab .build-steps li{display:flex;gap:17px;padding:20px 0;border-top:1px solid #d6dfca}#merchant-lab .build-steps li>span{font:11px/1.8 monospace;color:#7e8d6f}#merchant-lab .build-steps h3{font-size:13px}#merchant-lab .build-steps p{margin-top:7px;font-size:11px;color:#637459;line-height:1.8}#merchant-lab .build-steps code{font-size:10px}#merchant-lab .code-panel{background:#21332b;color:#e9efdd;border-radius:4px;overflow:hidden;min-width:0}#merchant-lab .code-toolbar{padding:13px 16px;display:flex;justify-content:space-between;border-bottom:1px solid #43553e;align-items:center;gap:20px}#merchant-lab .code-toolbar select{background:#2c4133;color:#e8eddf;border-color:#53664a;max-width:230px;padding:7px 9px;min-height:36px;font:10px monospace}#merchant-lab .code-toolbar button{color:#d2e8ac;background:transparent;border:0;font-size:10px;padding:10px 0;white-space:nowrap}#merchant-lab .code-panel pre{margin:0;padding:22px;overflow:auto;max-height:405px;font:10px/1.9 Consolas,monospace;tab-size:4}#merchant-lab .code-caption{padding:13px 18px;border-top:1px solid #43553e;font-size:8px;color:#bdcfa9}#merchant-lab .security-section{border-top:1px solid #d7dccf}#merchant-lab .crypto-grid{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid #d7dfcc;border-left:1px solid #d7dfcc}#merchant-lab .crypto-grid article{padding:24px 22px;border-right:1px solid #d7dfcc;border-bottom:1px solid #d7dfcc;background:#f8f9f2}#merchant-lab .crypto-number{font-size:8px;letter-spacing:.1em;color:#667b52;font-weight:700}#merchant-lab 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a{display:inline-block;font-size:10px;margin-top:18px}#merchant-lab .advanced-disclosure{border-top:1px solid #cfd9c3;margin-top:28px}#merchant-lab .advanced-disclosure+.advanced-disclosure{margin-top:0;border-bottom:1px solid #cfd9c3}#merchant-lab .advanced-disclosure>summary{display:flex;align-items:center;gap:25px;padding:23px 0;font-size:15px;font-weight:500;list-style:none}#merchant-lab .advanced-disclosure>summary::-webkit-details-marker{display:none}#merchant-lab .advanced-disclosure>summary>span{min-width:145px;font-size:9px;color:#6c7d5c}#merchant-lab .advanced-disclosure>summary b{margin-left:auto;font-size:20px;font-weight:400}#merchant-lab .advanced-disclosure[open]>summary b{transform:rotate(45deg)}#merchant-lab .advanced-content{padding:12px 0 30px;font-size:12px;max-width:100%}#merchant-lab .advanced-content p{color:#5e7252;margin-bottom:16px;line-height:1.8}#merchant-lab .explainer-switch{margin:18px 0}#merchant-lab .explainer-switch label{display:block;font-size:11px;margin-bottom:7px}#merchant-lab .state-diagram{width:100%;height:auto;display:block;border:1px solid #cfdac1;background:#eef3e4;padding:20px;border-radius:3px}#merchant-lab .intent-explanation{border-left:2px solid #a3bb83;padding:12px 17px;margin-top:15px;background:#edf2e3}#merchant-lab .clinic-grid{display:grid;grid-template-columns:1.3fr .8fr;gap:65px}#merchant-lab .clinic-grid h3{font-size:18px;margin-bottom:15px}#merchant-lab .clinic-controls{border:1px solid #cddbbe;border-radius:3px;padding:25px;background:#eef3e6}#merchant-lab .clinic-controls h4{font-size:15px;font-weight:500;margin:15px 0}#merchant-lab .clinic-controls .button{margin-top:9px}#merchant-lab .clinic-controls .text-button{display:block;padding:10px 0}#merchant-lab .clinic-controls .micro-copy{margin:10px 0 0}#merchant-lab .downloads-section{border-top:1px solid #d7dccf}#merchant-lab .download-feature{padding:32px;background:#25372e;color:#eef4e4;border-radius:4px;display:flex;gap:30px;align-items:center;justify-content:space-between}#merchant-lab .download-feature .tag{border-color:#6b7f56;color:#d4e9b4}#merchant-lab .download-feature h3{font-weight:500;font-size:23px;margin-top:13px}#merchant-lab .download-feature p{margin-top:10px;color:#c1d0b1;font-size:10px}#merchant-lab .asset-list{margin-top:20px}#merchant-lab .asset-list article{display:flex;justify-content:space-between;gap:25px;padding:21px 0;border-bottom:1px solid #d4dec8}#merchant-lab .asset-list article>div{min-width:0}#merchant-lab .asset-list h3{font-size:12px;font-weight:600}#merchant-lab .asset-list h3 a{text-decoration:none}#merchant-lab .asset-list h3 span{font-size:13px;color:#799660;margin-left:8px}#merchant-lab .asset-list p{font-size:10px;margin-top:4px;color:#6a7e5b}#merchant-lab .asset-list details{font-size:8px;margin-top:9px;color:#6d815d}#merchant-lab .asset-list code{display:block;overflow-wrap:anywhere;font-size:8px;margin-top:8px}#merchant-lab .asset-meta{font-size:9px;text-align:right;color:#6d805e;white-space:nowrap}#merchant-lab .download-notice{margin-top:19px;font-size:9px;color:#6b7c5d}#merchant-lab .source-section{border-top:1px solid #d7dccf;padding-top:36px;padding-bottom:36px}#merchant-lab .source-section h2{font-size:25px;margin-top:12px}#merchant-lab .source-links{display:grid;grid-template-columns:repeat(4,1fr);gap:15px 30px;margin-top:24px;margin-bottom:26px;font-size:10px}#merchant-lab .source-links a{text-decoration:none}#merchant-lab .source-links a:hover{text-decoration:underline}#merchant-lab .lab-footer{max-width:1280px;margin:auto;padding:23px 0 33px;border-top:1px solid #d7dccf;color:#748365;display:flex;justify-content:space-between;gap:20px;font-size:9px}#merchant-lab .lab-footer a{text-decoration:none}#merchant-lab .sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}#merchant-lab .chapter-nav span,#merchant-lab .section-heading .eyebrow,#merchant-lab .login-callout p,#merchant-lab .readonly-field span,#merchant-lab figcaption,#merchant-lab .principles article>span,#merchant-lab .build-steps li>span,#merchant-lab .crypto-number,#merchant-lab .advanced-disclosure>summary>span,#merchant-lab .asset-list p,#merchant-lab .asset-list details,#merchant-lab .asset-meta,#merchant-lab .download-notice,#merchant-lab .lab-footer,#merchant-lab .event-index,#merchant-lab .event-list small,#merchant-lab .micro-copy{color:#53684a}#merchant-lab .static-fallback{max-width:850px;margin:50px auto;padding:24px}#merchant-lab .static-fallback p{margin-top:20px}@media(min-width:1441px){#merchant-lab .hero{border-radius:6px}}@media(max-width:1400px){#merchant-lab .section,#merchant-lab .chapter-nav,#merchant-lab .lab-footer{margin-left:5.6%;margin-right:5.6%}}@media(max-width:1000px){#merchant-lab .hero{gap:5%;padding-top:54px;padding-bottom:48px}#merchant-lab h1{font-size:55px}#merchant-lab .hero-visual{padding:18px}#merchant-lab .trace-path b{display:none}#merchant-lab .scope-strip{flex-wrap:wrap;gap:10px 25px}#merchant-lab .scope-strip>span:nth-child(2){display:none}#merchant-lab .chapter-nav{gap:30px}#merchant-lab .workspace-grid{grid-template-columns:.9fr 1.1fr}#merchant-lab .panel{padding:22px}#merchant-lab .ledger-facts{grid-template-columns:1fr}#merchant-lab .state-grid>div{padding:0 10px}#merchant-lab .state-grid strong{font-size:11px}#merchant-lab .crypto-grid,#merchant-lab .source-links{grid-template-columns:1fr 1fr}#merchant-lab .download-feature .button{min-width:190px}}@media(max-width:760px){.preview-header{padding:12px 6%;min-height:75px;gap:20px}.preview-header nav{gap:20px;font-size:11px}.preview-header nav a:nth-child(2),.preview-header nav a:nth-child(3),.preview-header .local-label{display:none}.preview-header .brand img{width:78px;height:39px}.preview-header .brand{gap:12px;font-size:10px}.preview-header .brand span{padding-left:12px}#merchant-lab .hero{grid-template-columns:1fr;padding:40px 6% 32px;gap:36px}#merchant-lab h1{font-size:clamp(47px,10vw,65px);padding-top:18px}#merchant-lab .hero-lede{font-size:20px;margin-top:22px}#merchant-lab .hero-description{max-width:390px;font-size:12px}#merchant-lab .hero-actions{margin-top:23px}#merchant-lab .hero-meta{margin-top:26px}#merchant-lab .hero-visual{padding:21px;max-width:500px}#merchant-lab .trace-path b{display:block}#merchant-lab .trace-origin{margin-top:17px;padding:16px 0}#merchant-lab .trace-path{padding:13px 0}#merchant-lab .trace-path>div{min-height:44px}#merchant-lab .trace-caption{font-size:8px}#merchant-lab .scope-strip{padding:16px 6%;font-size:9px;gap:8px;flex-direction:column;align-items:flex-start}#merchant-lab .chapter-nav{gap:0;justify-content:space-between;padding:19px 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.ledger-facts{grid-template-columns:1fr;gap:9px}#merchant-lab .scenario-grid button{font-size:10px;min-height:43px;padding:9px}#merchant-lab .failure-actions{justify-content:space-between;gap:10px}#merchant-lab .worker-actions{flex-wrap:wrap}#merchant-lab .worker-actions .button{min-height:44px}#merchant-lab .feedback{padding:15px;font-size:11px}#merchant-lab .event-list small{font-size:7px}#merchant-lab .architecture-figure{padding:15px 12px;overflow:hidden}#merchant-lab .architecture-figure img{min-width:600px}#merchant-lab .architecture-figure{overflow-x:auto}#merchant-lab .architecture-figure figcaption{min-width:0;font-size:9px}#merchant-lab .principles{grid-template-columns:1fr;gap:22px}#merchant-lab .principles article{padding-left:16px}#merchant-lab .principles h3{display:inline;margin-left:12px;font-size:14px}#merchant-lab .build-layout{grid-template-columns:1fr;gap:25px}#merchant-lab .code-panel pre{font-size:9px;max-height:360px;padding:18px}#merchant-lab .code-toolbar{padding:12px;gap:10px}#merchant-lab .code-toolbar select{max-width:195px;font-size:9px;min-height:38px}#merchant-lab .code-toolbar button{font-size:9px}#merchant-lab .crypto-grid{grid-template-columns:1fr}#merchant-lab .crypto-grid article{padding:23px}#merchant-lab .crypto-grid h3{font-size:17px}#merchant-lab .crypto-grid p{font-size:12px}#merchant-lab .crypto-grid .micro-copy{font-size:10px}#merchant-lab .sandbox-callout{grid-template-columns:1fr;gap:24px;padding:24px}#merchant-lab .sandbox-callout aside{border-left:0;border-top:1px solid #c2d1af;padding:23px 0 0}#merchant-lab .advanced-disclosure>summary{align-items:flex-start;flex-wrap:wrap;gap:8px 14px;font-size:13px;position:relative;padding-right:24px}#merchant-lab .advanced-disclosure>summary>span{width:100%;min-width:0;font-size:9px}#merchant-lab .advanced-disclosure>summary b{position:absolute;right:0;top:30px}#merchant-lab .clinic-grid{grid-template-columns:1fr;gap:25px}#merchant-lab .download-feature{display:block;padding:25px}#merchant-lab .download-feature h3{font-size:21px}#merchant-lab .download-feature .button{margin-top:22px;width:100%;font-size:11px;gap:10px}#merchant-lab .asset-list article{gap:20px}#merchant-lab .asset-list p{font-size:10px}#merchant-lab .source-section h2{font-size:24px}#merchant-lab .source-links{grid-template-columns:1fr 1fr;font-size:9px;gap:15px 20px}#merchant-lab .lab-footer{flex-wrap:wrap;font-size:8px;gap:10px 20px}#merchant-lab .lab-footer span:last-child{width:100%}}@media(prefers-reduced-motion:reduce){#merchant-lab *,#merchant-lab *:before,#merchant-lab *:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}@media(forced-colors:active){#merchant-lab .button,#merchant-lab .tag,#merchant-lab .trace-number,#merchant-lab .terminal-check,#merchant-lab .panel,#merchant-lab .feedback{border:1px solid CanvasText}#merchant-lab .status-dot,#merchant-lab .square-dot,#merchant-lab .trace-mode i,#merchant-lab .live-indicator i{background:CanvasText}#merchant-lab :focus-visible{outline:3px solid Highlight}}