:root {
  color-scheme: light dark;
  --paper: #f5f0e5;
  --ink: #11110f;
  --muted: #55524b;
  --line: #8b877f;
  --signal: #b42318;
  --signal-text: #ffffff;
  --focus: #005fcc;
  --panel: #11110f;
  --panel-ink: #f5f0e5;
  --panel-muted: #d6d0c4;
  --panel-line: #76726a;
  --page-pad: clamp(1.25rem, 4.5vw, 4.5rem);
  --section-pad: clamp(5rem, 10vw, 9rem);
  --content-rail: clamp(0rem, 10vw, 8rem);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
  font-size: clamp(1rem, 0.96rem + 0.2vw, 1.125rem);
  line-height: 1.55;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--signal); color: var(--signal-text); }
a { color: inherit; text-decoration-thickness: 0.09em; text-underline-offset: 0.22em; }
a:hover { color: var(--signal); }
a:focus-visible, summary:focus-visible { outline: 3px solid var(--focus); outline-offset: 5px; }

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 10;
  padding: 0.65rem 0.85rem;
  background: var(--ink);
  color: var(--paper);
  clip-path: inset(50%);
  transform: translateY(-180%);
}

.skip-link:focus { clip-path: none; transform: translateY(0); }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  min-height: 4.75rem;
  padding: 0 var(--page-pad);
  border-bottom: 2px solid var(--ink);
}

.wordmark { display: inline-flex; align-items: baseline; gap: 0.8rem; font-weight: 850; letter-spacing: -0.025em; text-decoration: none; }
.wordmark span:last-child { padding-left: 0.8rem; border-left: 1px solid var(--line); color: var(--muted); font-size: 0.72rem; font-weight: 750; letter-spacing: 0; }
nav { display: flex; gap: clamp(1rem, 3vw, 2.5rem); font-size: 0.82rem; font-weight: 800; }
nav a { text-decoration: none; }

h1, h2, h3, p, figure { margin-top: 0; }

h1 {
  max-width: 19ch;
  margin-bottom: 2rem;
  font-size: clamp(2.5rem, 4.5vw, 4.25rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.06;
}

h2 {
  max-width: 15ch;
  margin-bottom: 1.5rem;
  font-size: clamp(2.5rem, 4vw, 4rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 0.96;
  text-wrap: balance;
}

h3 { margin-bottom: 1.25rem; font-size: 1rem; line-height: 1.25; }

.hero {
  display: grid;
  grid-template-columns: minmax(20rem, 1fr) minmax(26rem, 1fr);
  align-items: center;
  gap: clamp(3rem, 7vw, 7rem);
  min-height: min(54rem, calc(100vh - 4.75rem));
  padding: clamp(4rem, 8vw, 8rem) var(--page-pad);
}

.hero > * { min-width: 0; }
.hero-copy > p:not(.build-note) { max-width: 48ch; margin-bottom: 2rem; color: var(--muted); font-size: clamp(1.12rem, 1.8vw, 1.45rem); line-height: 1.45; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.hero-copy .build-note { max-width: 62ch; margin: 1.25rem 0 0; color: var(--muted); font-size: 0.875rem; line-height: 1.5; }
.hero-copy .build-note a { white-space: nowrap; }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.2rem;
  padding: 0.75rem 1.25rem;
  border: 2px solid var(--ink);
  font-size: 0.9rem;
  font-weight: 850;
  text-align: center;
  text-decoration: none;
}

.button-primary { background: var(--signal); border-color: var(--signal); color: var(--signal-text); }
.button-primary:hover { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.button-secondary:hover { background: var(--ink); color: var(--paper); }
.release-only { display: none !important; }
html[data-release-state="released"] .prelaunch-only { display: none !important; }
html[data-release-state="released"] a.release-only.button { display: inline-flex !important; }
html[data-release-state="released"] a.release-only:not(.button) { display: inline !important; }
html[data-release-state="released"] p.release-only { display: block !important; }

.hero-slate { margin: 0; }
.hero-slate img, .render img { display: block; width: 100%; height: auto; }
.hero-slate img { border: clamp(0.35rem, 0.7vw, 0.65rem) solid var(--ink); }
figcaption { padding-top: 0.7rem; color: var(--muted); font-size: 0.875rem; }
figcaption a { color: var(--ink); font-weight: 750; }

.section, .faq { padding: var(--section-pad) var(--page-pad); border-top: 2px solid var(--ink); }

.section-intro {
  display: grid;
  grid-template-columns: 0.9fr 0.7fr;
  align-items: end;
  gap: clamp(2rem, 9vw, 9rem);
  margin-bottom: clamp(3rem, 7vw, 6rem);
}

.section-intro h2 { margin-bottom: 0; }
.section-intro p { max-width: 40ch; margin-bottom: 0.4rem; color: var(--muted); font-size: 1.15rem; }

.how-body {
  display: grid;
  grid-template-columns: minmax(18rem, 0.7fr) minmax(28rem, 1.3fr);
  align-items: end;
  gap: clamp(2rem, 7vw, 7rem);
  margin-left: var(--content-rail);
}

.join-mechanism { align-self: center; padding-top: 1.25rem; border-top: 2px solid var(--ink); }
.join-mechanism p { margin-bottom: 0; color: var(--muted); font-size: 1.05rem; }
.render { margin: 0; }
.render-badge img { border: 1px solid var(--ink); }

.receipts { padding: var(--section-pad) var(--page-pad); background: var(--panel); color: var(--panel-ink); }
.receipt-intro { display: grid; grid-template-columns: 1.25fr 0.75fr; align-items: end; gap: clamp(2rem, 8vw, 8rem); margin-bottom: clamp(4rem, 8vw, 8rem); }
.receipt-intro h2 { max-width: 14ch; margin-bottom: 0; }
.receipt-intro p { max-width: 32ch; margin-bottom: 0.4rem; color: var(--panel-muted); }
.receipt-body { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: clamp(3rem, 9vw, 9rem); }
.receipt-contents { margin: 0; padding: 0; list-style: none; }

.receipt-contents li { display: grid; grid-template-columns: minmax(8rem, 0.55fr) 1fr; gap: 1rem; padding: 1.25rem 0; border-top: 1px solid var(--panel-line); }
.receipt-contents span { color: var(--panel-muted); }
.receipt-check { align-self: start; padding: 1.5rem; background: var(--signal); color: var(--signal-text); }
.receipt-check p:last-child { margin-bottom: 0; }

.proof-line { max-width: 74ch; margin: clamp(4rem, 8vw, 8rem) 0 0; padding-top: 1.5rem; border-top: 2px solid var(--panel-ink); font-size: clamp(1.3rem, 2.3vw, 2rem); font-weight: 700; letter-spacing: -0.02em; line-height: 1.4; }

.faq-list { margin-left: var(--content-rail); }

.faq h2 { margin-bottom: clamp(3rem, 6vw, 5rem); }
.faq-list { border-top: 2px solid var(--ink); }
details { border-bottom: 1px solid var(--line); }
summary { position: relative; padding: 1.5rem 3rem 1.5rem 0; cursor: pointer; list-style: none; font-size: clamp(1.15rem, 2vw, 1.55rem); font-weight: 850; letter-spacing: -0.02em; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; position: absolute; right: 0; color: var(--signal); font-size: 1.7rem; font-weight: 500; }
details[open] summary::after { content: "-"; }
details p { max-width: 70ch; padding: 0 3rem 1.75rem 0; color: var(--muted); }

footer { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem 2rem; padding: 2rem var(--page-pad); background: var(--panel); color: var(--panel-ink); font-size: 0.8rem; }
footer a:hover { color: #ff6a60; }

@media (max-width: 920px) {
  :root { --content-rail: 0rem; }
  .hero, .section-intro, .how-body, .receipt-intro, .receipt-body { grid-template-columns: 1fr; }
  .hero { min-height: 0; }
  .hero-slate { max-width: 52rem; }
  .section-intro { align-items: start; }
  .how-body { gap: 3rem; }
  .join-mechanism { max-width: 48rem; }
  .receipt-intro { align-items: start; }
  .receipt-intro p { max-width: 48ch; }
}

@media (max-width: 700px) {
  .site-header { min-height: 4.25rem; }
  nav a:not(:last-child) { display: none; }
  h1 { font-size: clamp(2.5rem, 10vw, 3.5rem); }
  h2 { font-size: clamp(2.35rem, 11vw, 3.2rem); }
  .hero { padding-top: 4rem; padding-bottom: 5rem; }
  .wordmark { gap: 0.55rem; }
  .wordmark span:last-child { display: none; }
  .hero-actions { align-items: stretch; }
  .hero-actions .button { flex: 1 1 100%; }
  .receipt-contents li { grid-template-columns: 1fr; gap: 0.5rem; }
  footer { justify-content: flex-start; }
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #141311;
    --ink: #f5f0e5;
    --muted: #c5bfb3;
    --line: #817d75;
    --focus: #75b7ff;
    --panel: #050504;
    --panel-ink: #f5f0e5;
  }

  .hero-slate img { border-color: var(--ink); }
  .button-primary:hover { background: var(--ink); border-color: var(--ink); color: var(--paper); }
  .button-secondary:hover { background: var(--ink); color: var(--paper); }
  figcaption a { color: var(--ink); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}