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@media(max-width:800px){.desktop-nav{display:none}.menu-toggle{display:flex;flex-direction:column;justify-content:center;gap:6px;width:44px;height:44px;border:0;background:none;padding:var(--s3)}.menu-toggle span{height:1px;width:20px;background:var(--text)}.header{height:84px}.section{padding:var(--s20) 0}.hero{min-height:770px}.hero-art{width:87%;right:-32px;top:105px;height:540px;opacity:.48}.hero-content{width:90%}h1{font-size:76px}.hero-receipt{bottom:86px;width:290px}.hero-description{font-size:17px}.hero-bottom{bottom:var(--s6)}.hero-bottom>a{display:none}.section-heading{align-items:flex-start;flex-direction:column;gap:var(--s6)}.heading-aside{width:100%;max-width:540px}.quickstart{grid-template-columns:1fr;gap:var(--s8)}.quickstart-copy p{max-width:100%}.quickstart-copy h3 br{display:none}.flow-result{grid-template-columns:1fr 2fr}.next-step{grid-column:2;justify-self:end}.benefits article,.benefits article+article{padding:var(--s6) var(--s5)}.benefits article:first-child{padding-left:0}.benefits h2{font-size:20px}.benefits p:not(.eyebrow){font-size:13px}.benefits .quiet-link{font-size:11px}.paths{gap:var(--s8)}.paths article+article{padding-left:var(--s8)}.pursekeeper-card{grid-template-columns:1fr}.pursekeeper-visual{min-height:350px}.pursekeeper-copy{padding:var(--s8)}.facilitator{align-items:flex-start;flex-direction:column;gap:var(--s6)}.safety-section,.faq-section{grid-template-columns:1fr;gap:var(--s12)}.safety-heading p br{display:none}.closing{padding:var(--s20) 0}.closing h2{font-size:72px}.closing-symbol{right:-20px;top:var(--s6);font-size:280px}.footer-top{gap:var(--s6)}.footer-top>span{font-size:11px}.footer-bottom{align-items:flex-start;flex-direction:column;gap:var(--s5)}.footer-bottom>div{justify-content:flex-start}}
@media(max-width:760px){.footer-links{gap:var(--s2) var(--s8);font-size:13px}.footer-links a{display:inline-flex;align-items:center;min-height:44px}.footer-bottom{flex-direction:column;align-items:flex-start;gap:var(--s3)}.footer-bottom>div{justify-content:flex-start}.footer-bottom a{display:inline-flex;align-items:center;min-height:40px}.quiet-link,.section-note{font-size:13px}.pursekeeper-copy .disclaimer{font-size:12.5px!important}}
@media(max-width:520px){.shell{padding:0 var(--s6)}.brand>span{font-size:30px}.brand svg{width:24px;height:32px}.nav-actions .button{display:none}.header{height:76px}.hero{padding-top:var(--s6);min-height:790px}.breadcrumb{margin-bottom:var(--s10);font-size:10px}.hero .eyebrow{font-size:10px;letter-spacing:.7px}.spark{font-size:18px}h1{font-size:clamp(52px,12.3vw,64px);letter-spacing:-3px}.hero-content{width:100%}.hero-description{font-size:16px;margin-top:var(--s6)}.desktop-break{display:none}.hero .button-row{gap:var(--s5);margin-top:var(--s6)}.button{padding:var(--s4) var(--s5);gap:var(--s6);font-size:13px}.text-link{font-size:13px;gap:var(--s4)}.hero-art{width:130%;right:-24px;top:230px;height:450px;opacity:.48;mask-image:linear-gradient(0deg,transparent,#000 22%,#000 70%,transparent)}.hero-receipt{bottom:86px;width:270px;right:0}.hero-bottom{font-size:11px}.benefits{grid-template-columns:1fr}.benefits article,.benefits article+article{padding:var(--s6) 0;border-left:0}.benefits article+article{border-top:1px solid var(--line)}.benefits h2{font-size:25px}.benefits p:not(.eyebrow){font-size:15px}.benefits .eyebrow{margin-bottom:var(--s3)}.benefits .quiet-link{font-size:12px}.section-note{font-size:11px}.section h2{font-size:40px;letter-spacing:-2px}.section .eyebrow{font-size:10px;letter-spacing:1px}.section-heading{margin-bottom:var(--s8)}.heading-aside{font-size:15px}.demo-header{align-items:flex-start;flex-direction:column;padding:var(--s4);gap:var(--s2)}.demo-badge{font-size:9px}.flow-step{padding:var(--s5) var(--s3)}.step-number{font-size:11px;margin-bottom:var(--s4)}.flow-step strong{font-size:16px;line-height:1.3;letter-spacing:-.5px}.step-caption{font-size:10px;line-height:1.5;margin-top:var(--s3)}.step-arrow{display:none}.flow-result{grid-template-columns:1fr;padding:var(--s5);gap:var(--s4)}.flow-result>div{display:flex;align-items:center;gap:var(--s4)}.next-step{grid-column:auto;justify-self:start}.under-demo{flex-direction:column;gap:var(--s3);font-size:11px}.quickstart-copy h3{font-size:28px}.code-top{padding:var(--s4)}.code-tabs{padding:0 var(--s2)}.code-tabs button{padding:var(--s3) var(--s2);font-size:11px}pre{padding:var(--s4);font-size:11px;min-height:230px}.code-foot{padding:var(--s3);font-size:10px}.paths{grid-template-columns:1fr;margin-top:var(--s8);padding:var(--s8) 0;gap:var(--s8)}.paths article+article{padding:var(--s8) 0 0;border-left:0;border-top:1px solid var(--line)}.verification summary{padding:var(--s4);font-size:12px}.verification-content{padding:var(--s4)}.test-stats{grid-template-columns:1fr;gap:var(--s4)}.test-stats>div{display:flex;align-items:baseline;gap:var(--s4)}.test-stats strong{font-size:20px}.pursekeeper-visual{min-height:310px;padding:var(--s6)}.pursekeeper-visual>.eyebrow{top:var(--s6);left:var(--s6);font-size:9px}.pursekeeper-copy{padding:var(--s6)}.pursekeeper-copy h3{font-size:27px}.pk-title{font-size:28px}.pk-mark{font-size:110px}.pk-mark span{font-size:60px;right:-38px}.pursekeeper-visual>.micro{font-size:9px}.faq-section h2{font-size:38px}.faq-list summary{font-size:14px}.safety-list{gap:var(--s4)}.safety-list h3{font-size:19px}.safety-list p{font-size:14px}.closing h2{font-size:66px}.closing-symbol{font-size:240px;right:-36px;top:var(--s20)}.closing .button-row{gap:var(--s5)}.footer-top{flex-wrap:wrap;gap:var(--s4)}.footer-top>span{order:3;flex-basis:100%}.footer-links{gap:var(--s4) var(--s6)}.footer-bottom{font-size:12px}.footer-top>.quiet-link{font-size:12px}}
/* Keep metadata legible at every viewport. */
.breadcrumb,.hero-receipt .micro,.hero-bottom a span,.demo-badge,.code-top,.code-top .micro,.code-foot,.pursekeeper-visual>.eyebrow,.pursekeeper-visual>.micro,.pursekeeper-copy .eyebrow,.pursekeeper-copy .disclaimer,.facilitator .eyebrow,.test-stats span,.footer-bottom,.step-caption{font-size:max(12px, .7rem)}
.hero-receipt strong{white-space:nowrap}.hero-receipt .micro{display:block;line-height:1.5}
@media(max-width:520px){.hero-receipt{width:min(100%,320px);padding:var(--s5);gap:var(--s2)}.hero-receipt strong{font-size:24px}.receipt-arrow{font-size:26px}.hero-receipt .micro{letter-spacing:.3px}.breadcrumb,.hero .eyebrow,.hero-bottom,.section .eyebrow,.section-note,.under-demo,.code-tabs button,.footer-top>span,.footer-top>.quiet-link{font-size:12px}}
.brand .brand-logo{display:block;width:144px;height:auto}.closing-symbol img{display:block;width:240px;height:auto;margin-top:70px}
@media(max-width:520px){.brand .brand-logo{width:120px}.closing-symbol img{width:170px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important;animation:none!important}}

/* Tighter section rhythm + plain-text flow summary */
.section{padding:80px 0}
.closing{padding:80px 0}
.hero{min-height:auto;padding-bottom:var(--s10)}
@media(max-width:900px){.section,.closing{padding:56px 0}.hero{min-height:auto}}
.flow-plain{list-style:none;margin:var(--s6) 0 0;padding:0;display:grid;gap:14px;max-width:760px}
.flow-plain li{font-size:15px;line-height:1.65;color:var(--muted)}
.flow-plain strong{color:var(--text);font-weight:550}
.flow-plain code{font-size:13px}
.hero-bottom{position:static;margin-top:var(--s8);padding-top:var(--s5);border-top:1px solid var(--line)}
.hero-content{width:100%;max-width:820px}
.under-demo{margin-top:var(--s6)}

/* Services that take Nano: a live directory of paid agent endpoints. */
.market-intro{max-width:64ch;color:var(--muted);font-size:17px;margin:0 0 var(--s10)}
.market-intro a{color:var(--blue);text-decoration:underline;text-underline-offset:3px}
.market-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--s8);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:var(--s8) 0;margin-bottom:var(--s12)}
.market-stats strong{display:block;font-size:32px;font-weight:550;letter-spacing:-.5px;color:var(--text)}
.market-stats span{display:block;font-size:12.5px;color:var(--dim);margin-top:var(--s2);max-width:26ch}
.market-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line)}
.market-row{background:var(--bg);padding:var(--s8)}
.market-grid::after{content:"";background:var(--bg)}
.market-head{display:flex;align-items:flex-start;justify-content:space-between;gap:var(--s4)}
.market-row h4{margin:0;font-size:19px;font-weight:550;letter-spacing:-.2px;line-height:1.3}
.market-op{margin:var(--s1) 0 var(--s4);font-size:12.5px;color:var(--dim)}
.market-what{margin:0 0 var(--s4);color:var(--muted);font-size:14.5px;line-height:1.6}
.market-price{margin:0 0 var(--s3);font-size:14px;color:var(--text)}
.market-proof{margin:0 0 var(--s4);font-size:12.5px;color:var(--dim);line-height:1.7}
.market-proof code{font-size:12px;color:var(--muted)}
.pill{flex:0 0 auto;font:11px ui-monospace,monospace;letter-spacing:.6px;
  padding:3px 8px;border-radius:999px;white-space:nowrap;margin-top:2px}
.pill-up{color:#8ef0c0;background:rgba(60,200,140,.12);border:1px solid rgba(60,200,140,.3)}
.pill-down{color:#f2b6b6;background:rgba(220,110,110,.1);border:1px solid rgba(220,110,110,.28)}
.tag-new{display:block;margin-top:var(--s1);color:var(--muted)}
.market-section .disclaimer{margin-top:var(--s8);max-width:78ch}
.market-section .disclaimer a{color:var(--muted);text-decoration:underline;text-underline-offset:2px}
.market-cards{display:grid;grid-template-columns:1fr 1fr;gap:var(--s8);margin-top:var(--s12)}
.market-card{background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-sm);padding:var(--s10)}
.market-card h3{margin:var(--s3) 0 var(--s4);font-size:24px;font-weight:550;letter-spacing:-.4px}
.market-card p{color:var(--muted);font-size:15px;line-height:1.7;margin:0 0 var(--s5)}
.market-card .clean-list{margin:0 0 var(--s5)}
.market-card .clean-list li{font-size:14.5px}
.market-card .micro-note{font-size:12.5px;color:var(--dim);margin-bottom:var(--s5)}
.market-machine{margin-top:var(--s12);border-top:1px solid var(--line);padding-top:var(--s8)}
.market-machine>div{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--s6);margin-top:var(--s5)}
.market-machine a{display:block;padding:var(--s5);border:1px solid var(--line);
  border-radius:var(--radius-sm);background:var(--surface2)}
.market-machine a:hover{border-color:var(--blue)}
.market-machine code{display:block;font-size:13px;color:var(--blue);margin-bottom:var(--s2);word-break:break-all}
.market-machine span{display:block;font-size:12.5px;color:var(--dim);line-height:1.6}
@media(max-width:1050px){
  .market-machine>div{grid-template-columns:1fr 1fr}
}
@media(max-width:800px){
  .market-grid,.market-cards{grid-template-columns:1fr}
  .market-stats{grid-template-columns:1fr;gap:var(--s6)}
  .market-stats strong{font-size:28px}
}
@media(max-width:520px){
  .market-machine>div{grid-template-columns:1fr}
  .market-row{padding:var(--s6)}
  .market-card{padding:var(--s6)}
}

.arw{margin-left:var(--s3);display:inline-block}

/* link-style section asides sit flush right, aligned with other section links */
a.heading-aside{width:auto;text-align:right;white-space:nowrap;align-self:flex-end}

/* guardrails: heading and list read as a single panel on desktop */
@media(min-width:1051px){
  .safety-section{align-items:stretch;gap:0;border:1px solid var(--line);border-radius:var(--radius-sm);padding:var(--s10)}
  .safety-section>.safety-heading{padding-right:var(--s10);border-right:1px solid var(--line)}
  .safety-section>.safety-list{padding-left:var(--s10)}
}

.flow-section .section-sub{color:var(--muted);font-size:16px;max-width:620px;margin-top:var(--s5)}

/* x402 implementation cards */

.impl-buttons{display:flex;flex-wrap:wrap;gap:var(--s4);margin-top:var(--s10)}

@media(max-width:800px){
  .hero .button-row{flex-direction:column;align-items:flex-start;gap:var(--s4)}
  .hero .button-row .button,.hero .button-row .text-link{width:100%;max-width:280px;justify-content:space-between;padding-left:var(--s5);padding-right:var(--s5);min-height:54px;margin-top:0}
  .hero .button-row .text-link span{font-size:13px;font-weight:600}
}

.newtab-note{font-size:.78em;color:var(--dim);white-space:nowrap}

#mobile-nav .newtab-note{margin-left:.3em}

.footer-social{margin-top:8px;opacity:.85}