:root {
  --ink: #17191a;
  --ink-soft: #45494c;
  --muted: #6a6e71;
  --paper: #f9f9f7;
  --surface: #ffffff;
  --wash: #f1f1ed;
  --line: #d5d5cd;
  --line-dark: #8e8e84;
  --blue: #134a86;
  --blue-dark: #0f3c6e;
  --green: #0b5940;
  --green-light: #6fd1a6;
  --dark: #17191a;
  --serif: Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  --mono: ui-monospace, "SFMono-Regular", Consolas, monospace;
  --shell: 1200px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: var(--blue); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: var(--green); }
button, input, select, textarea { font: inherit; }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; border-radius: 2px; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 100; background: var(--ink); color: #fff; padding: 12px 16px; }
.skip-link:focus { top: 16px; }
.shell { width: min(100% - 80px, var(--shell)); margin-inline: auto; }
.eyebrow { margin: 0; color: var(--muted); font: 500 0.72rem/1.4 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; }
.kicker { margin: 0; color: var(--green); font: italic 1.85rem/1.3 var(--serif); }
h1, h2, h3 { font-family: var(--serif); text-wrap: balance; }
h1 { margin: 0; font-size: clamp(3rem, 6vw, 4.25rem); line-height: 1.04; letter-spacing: -0.022em; }
h2 { margin: 0; font-size: clamp(2rem, 4vw, 2.65rem); line-height: 1.12; letter-spacing: -0.018em; }
h3 { margin: 0; font-size: 1.4rem; line-height: 1.25; }
p { text-wrap: pretty; }
.lead { margin: 0; color: var(--ink-soft); font: 1.17rem/1.67 var(--sans); max-width: 66ch; }
.body-copy { color: var(--ink-soft); font-size: 1.03rem; line-height: 1.68; }
.body-copy p { margin: 0; }
.body-copy p + p { margin-top: 1rem; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 11px 19px; border: 1px solid var(--blue); border-radius: 3px; background: var(--blue); color: #fff; font-size: 0.96rem; font-weight: 600; text-decoration: none; }
.button:hover { background: var(--blue-dark); color: #fff; }
.button.secondary { background: var(--surface); border-color: var(--line-dark); color: var(--ink); }
.button.secondary:hover { background: var(--wash); color: var(--ink); }
.text-link { font-weight: 600; }

.site-header { position: sticky; top: 0; z-index: 50; border-bottom: 1px solid var(--line); background: color-mix(in srgb, var(--paper) 96%, transparent); backdrop-filter: blur(12px); }
.header-inner { min-height: 72px; display: grid; grid-template-columns: auto 1fr auto; gap: 28px; align-items: center; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); font: 600 1.35rem/1 var(--serif); text-decoration: none; }
.brand svg { width: 26px; height: 26px; }
.nav-toggle { display: none; border: 1px solid var(--line-dark); background: var(--surface); color: var(--ink); border-radius: 3px; min-height: 44px; padding: 8px 12px; font-weight: 600; }
.primary-nav { display: flex; justify-content: flex-end; align-items: center; gap: 6px 20px; font-size: 0.91rem; }
.primary-nav > a, .nav-dropdown > summary { color: var(--ink-soft); text-decoration: none; padding: 12px 2px; cursor: pointer; list-style: none; }
.nav-dropdown > summary::-webkit-details-marker { display: none; }
.nav-dropdown > summary::after { content: "⌄"; display: inline-block; margin-left: 6px; color: var(--muted); }
.nav-dropdown { position: relative; }
.nav-dropdown[open] > summary { color: var(--ink); }
.dropdown-panel { position: absolute; top: calc(100% + 8px); left: -16px; min-width: 260px; padding: 10px; border: 1px solid var(--line); background: var(--surface); box-shadow: 0 14px 36px rgba(23,25,26,.12); }
.dropdown-panel a { display: block; padding: 9px 10px; color: var(--ink-soft); text-decoration: none; line-height: 1.35; }
.dropdown-panel a:hover { background: var(--wash); color: var(--ink); }
.header-cta { white-space: nowrap; }

.hero { padding-block: 92px 78px; display: grid; grid-template-columns: 1.05fr .95fr; gap: 70px; align-items: start; }
.hero-copy { display: flex; flex-direction: column; gap: 27px; min-width: 0; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.status-row { display: flex; gap: 12px 26px; flex-wrap: wrap; padding-top: 18px; border-top: 1px solid var(--line); color: var(--ink-soft); font-size: 0.86rem; }
.status-row span { display: inline-flex; align-items: center; gap: 8px; }
.status-row span::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--green); }
.receipt { border: 1px solid #b9b9af; background: var(--surface); }
.receipt-head { padding: 14px 20px; border-bottom: 1px solid #e4e4de; display: flex; justify-content: space-between; gap: 16px; }
.receipt-answer { margin: 0; padding: 22px 20px; font-size: 1rem; line-height: 1.65; }
.receipt-simple { margin: 0 20px 18px; padding: 13px 0; border-block: 1px solid #e4e4de; color: var(--green); font: 500 0.82rem/1.5 var(--mono); }
.receipt details { border-top: 1px solid var(--line); background: var(--paper); }
.receipt summary { cursor: pointer; padding: 14px 20px; color: var(--ink-soft); font-size: 0.88rem; font-weight: 600; }
.receipt-detail { padding: 0 20px 20px; display: grid; gap: 10px; color: var(--ink-soft); font-size: 0.88rem; }
.receipt-detail div { display: grid; grid-template-columns: 130px 1fr; gap: 16px; padding-bottom: 8px; border-bottom: 1px solid #e4e4de; }
.receipt-caption { margin: 12px 0 0; color: var(--muted); font-size: 0.8rem; line-height: 1.5; }

.section { border-top: 1px solid var(--line); padding-block: 78px; }
.section.wash { background: var(--wash); }
.section-head { display: flex; justify-content: space-between; align-items: end; gap: 32px; margin-bottom: 38px; }
.section-head > p { margin: 0; max-width: 48ch; color: var(--ink-soft); line-height: 1.65; }
.two-col { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,1fr); gap: 64px; align-items: start; }
.stack { display: flex; flex-direction: column; gap: 20px; }
.grid { display: grid; gap: 1px; border: 1px solid var(--line); background: var(--line); }
.grid.two { grid-template-columns: repeat(2, minmax(0,1fr)); }
.grid.three { grid-template-columns: repeat(3, minmax(0,1fr)); }
.grid.four { grid-template-columns: repeat(4, minmax(0,1fr)); }
.card { background: var(--surface); padding: 28px 25px; display: flex; flex-direction: column; gap: 13px; min-width: 0; }
.card p { margin: 0; color: var(--ink-soft); line-height: 1.62; }
.card .number { color: var(--muted); font: 0.72rem/1 var(--mono); }
.card .tagline { color: var(--green); font: 500 0.75rem/1.4 var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.card.highlight { border-top: 2px solid var(--blue); }

.dark-section { border-top: 1px solid var(--line); padding-block: 78px; background: var(--dark); color: #ededE9; }
.dark-section .eyebrow { color: var(--green-light); }
.dark-section .lead { color: #b6babd; }
.position-grid { margin-top: 38px; display: grid; grid-template-columns: 1fr 1.2fr 1fr; gap: 1px; border: 1px solid #2e3134; background: #2e3134; }
.position-card { padding: 29px 25px; background: #0f1112; display: flex; flex-direction: column; gap: 13px; }
.position-card p { margin: 0; color: #b6babd; font-size: .92rem; line-height: 1.62; }
.position-card.active { background: #16181a; border-top: 2px solid var(--green-light); }
.position-card h3 { color: #edede9; }

.pricing-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 1px; border: 1px solid var(--line); background: var(--line); }
.price-card { padding: 31px 27px; background: var(--paper); display: flex; flex-direction: column; gap: 19px; }
.price-card.popular { background: var(--surface); border-top: 2px solid var(--blue); }
.price { font: 2rem/1.2 var(--mono); letter-spacing: -.03em; }
.price small { font: .95rem/1 var(--sans); color: var(--muted); }
.features { margin: 0; padding: 18px 0 0; border-top: 1px solid var(--line); list-style: none; display: grid; gap: 10px; color: var(--ink-soft); font-size: .91rem; line-height: 1.48; }
.features li { display: grid; grid-template-columns: 16px 1fr; gap: 8px; }
.features li::before { content: "✓"; color: var(--green); }
.price-card .button { margin-top: auto; }
.price-note { margin: 20px 0 0; color: var(--muted); font-size: .88rem; line-height: 1.6; }
.hardware-note { margin: 18px 0 0; padding: 18px 20px; border-left: 3px solid var(--green); background: var(--surface); color: var(--ink-soft); line-height: 1.6; }

.page-hero { padding-block: 80px 62px; }
.breadcrumbs { margin: 0 0 24px; color: var(--muted); font-size: .84rem; }
.breadcrumbs a { color: inherit; }
.page-hero h1 { max-width: 18ch; }
.page-hero .lead { margin-top: 28px; }
.article { padding-block: 64px 80px; border-top: 1px solid var(--line); }
.article-grid { display: grid; grid-template-columns: minmax(0,.34fr) minmax(0,.66fr); gap: 64px; }
.article-nav { position: sticky; top: 100px; align-self: start; }
.article-nav p { margin: 0; color: var(--muted); font: .75rem/1.4 var(--mono); letter-spacing: .1em; text-transform: uppercase; }
.article-nav ul { list-style: none; margin: 14px 0 0; padding: 0; display: grid; gap: 8px; }
.article-nav a { color: var(--ink-soft); font-size: .91rem; text-decoration: none; }
.article-content { display: flex; flex-direction: column; gap: 50px; min-width: 0; }
.content-section { scroll-margin-top: 100px; }
.content-section h2 { font-size: clamp(1.8rem,3vw,2.35rem); margin-bottom: 17px; }
.content-section h3 { margin: 28px 0 10px; }
.content-section p, .content-section li { color: var(--ink-soft); font-size: 1.02rem; line-height: 1.72; }
.content-section p { margin: 0; }
.content-section p + p { margin-top: 15px; }
.content-section ul, .content-section ol { margin: 16px 0 0; padding-left: 22px; }
.steps { counter-reset: step; display: grid; gap: 1px; border: 1px solid var(--line); background: var(--line); }
.step { counter-increment: step; background: var(--surface); padding: 24px; display: grid; grid-template-columns: 34px 1fr; gap: 14px; }
.step::before { content: counter(step, decimal-leading-zero); color: var(--green); font: .78rem/1.5 var(--mono); }
.step h3 { margin: 0 0 7px; }
.step p { margin: 0; }
.comparison { width: 100%; border-collapse: collapse; background: var(--surface); font-size: .92rem; }
.comparison th, .comparison td { padding: 15px; border: 1px solid var(--line); text-align: left; vertical-align: top; line-height: 1.5; }
.comparison th { background: var(--wash); }
.comparison caption { text-align: left; margin-bottom: 10px; color: var(--muted); }
.package-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 16px; }
.package { border: 1px solid var(--line); background: var(--surface); padding: 23px; }
.package p { margin-top: 10px; }
.legal-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 16px; }
.legal-card { border: 1px solid var(--line); background: var(--surface); padding: 24px; }
.legal-card p { margin-top: 10px; }

.use-cases { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 18px; }
.use-case { position: relative; padding: 24px; border: 1px solid var(--line); background: var(--surface); }
.use-case::after { content: ""; position: absolute; left: 28px; bottom: -9px; width: 16px; height: 16px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--surface); transform: rotate(45deg); }
.pill { display: inline-flex; margin-bottom: 14px; padding: 5px 9px; border-radius: 999px; background: #e6f0ea; color: var(--green); font: 500 .72rem/1.3 var(--mono); }
.use-case blockquote { margin: 0; font: 1.08rem/1.58 var(--serif); }
.use-case .why { margin: 17px 0 0; padding-top: 14px; border-top: 1px solid #e4e4de; color: var(--muted); font-size: .84rem; line-height: 1.5; }
.requirements { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 1px; border: 1px solid var(--line); background: var(--line); }
.requirement { padding: 22px; background: var(--wash); }
.requirement h3 { font-size: 1.15rem; }
.requirement p { margin-top: 8px; font-size: .93rem; }

.tech-page .page-hero { background: var(--dark); color: #edede9; }
.tech-page .page-hero .lead { color: #b6babd; }
.tech-page .breadcrumbs { color: #9aa0a4; }
.tech-code { overflow-x: auto; padding: 20px; border: 1px solid #2e3134; background: #0f1112; color: #d8ede4; font: .84rem/1.65 var(--mono); }
.tech-list { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 1px; border: 1px solid var(--line); background: var(--line); }
.tech-list > div { padding: 24px; background: var(--surface); }
.tech-list p { margin-top: 8px; }

.faq-list { display: grid; gap: 10px; }
.faq-item { border: 1px solid var(--line); background: var(--surface); }
.faq-item summary { cursor: pointer; padding: 20px 22px; font-weight: 650; line-height: 1.4; }
.faq-item p { margin: 0; padding: 0 22px 22px; color: var(--ink-soft); line-height: 1.68; }

.cta { border-top: 1px solid var(--line); background: var(--wash); padding-block: 62px; }
.cta-inner { display: grid; grid-template-columns: 1fr auto; gap: 36px; align-items: center; }
.cta h2 { font-size: clamp(1.9rem,4vw,2.55rem); }
.cta p { margin: 12px 0 0; max-width: 68ch; color: var(--ink-soft); line-height: 1.65; }

.site-footer { background: var(--dark); color: #9aa0a4; }
.footer-inner { padding-block: 48px; display: grid; grid-template-columns: 1.2fr 2fr; gap: 56px; }
.footer-brand { display: flex; flex-direction: column; gap: 14px; }
.footer-brand .brand { color: #f2f2ee; }
.footer-brand p { margin: 0; max-width: 38ch; font-size: .87rem; line-height: 1.6; }
.footer-contact { color: #b6babd; font-size: .85rem; line-height: 1.7; }
.footer-contact a { color: #b6babd; }
.footer-links { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 28px; }
.footer-col { display: flex; flex-direction: column; gap: 9px; }
.footer-col h2 { color: #656b70; font: .68rem/1.4 var(--mono); letter-spacing: .12em; text-transform: uppercase; }
.footer-col a { color: #b6babd; font-size: .85rem; text-decoration: none; }
.footer-col a:hover { color: #fff; }
.footer-bottom { padding-block: 18px; border-top: 1px solid #2e3134; font: .72rem/1.5 var(--mono); }

@media (max-width: 980px) {
  .shell { width: min(100% - 56px, var(--shell)); }
  .header-inner { grid-template-columns: auto auto; }
  .nav-toggle { display: inline-flex; justify-self: end; }
  .primary-nav { display: none; grid-column: 1/-1; align-items: stretch; padding: 10px 0 20px; }
  .primary-nav[data-open="true"] { display: grid; }
  .primary-nav > a, .nav-dropdown > summary { min-height: 44px; display: flex; align-items: center; padding: 10px 4px; }
  .dropdown-panel { position: static; min-width: 0; box-shadow: none; margin: 0 0 8px; }
  .header-cta { display: none; }
  .hero { grid-template-columns: 1fr; gap: 46px; padding-block: 70px 62px; }
  .grid.four { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .pricing-grid { grid-template-columns: 1fr; }
  .article-grid { grid-template-columns: 1fr; gap: 34px; }
  .article-nav { position: static; }
  .article-nav ul { display: flex; flex-wrap: wrap; gap: 8px 18px; }
  .requirements { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .shell { width: min(100% - 40px, var(--shell)); }
  .section, .dark-section { padding-block: 58px; }
  .section-head { display: grid; gap: 18px; }
  .two-col, .grid.two, .grid.three, .position-grid, .package-grid, .legal-grid, .use-cases, .tech-list { grid-template-columns: 1fr; }
  .grid.four { grid-template-columns: 1fr; }
  .page-hero { padding-block: 58px 46px; }
  .article { padding-block: 48px 62px; }
  .article-content { gap: 42px; }
  .comparison-wrap { overflow-x: auto; padding-bottom: 8px; }
  .comparison { min-width: 620px; }
  .cta-inner, .footer-inner { grid-template-columns: 1fr; }
  .cta-inner .button { justify-self: start; }
  .footer-links { grid-template-columns: repeat(2,minmax(0,1fr)); }
}

@media (max-width: 420px) {
  .shell { width: min(100% - 32px, var(--shell)); }
  .hero { padding-block: 50px 48px; }
  h1 { font-size: clamp(2.55rem,13vw,3.35rem); }
  .kicker { font-size: 1.55rem; }
  .receipt-head { display: grid; gap: 4px; }
  .receipt-detail div { grid-template-columns: 1fr; gap: 3px; }
  .footer-links { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}