@import url('https://fonts.googleapis.com/css2?family=Archivo:ital,wght@0,400;0,500;0,600;0,700;0,900;1,600&family=JetBrains+Mono:wght@400;500;700&display=swap');

:root {
  /* Paper: cool near-white, not cream. */
  --paper: #f3f4f7;
  --paper: oklch(97.5% 0.004 260);
  --paper-alt: #e7e9ee;
  --paper-alt: oklch(93% 0.006 260);

  /* Ink: near-black navy, not pure black. */
  --ink: #12151c;
  --ink: oklch(21% 0.02 260);
  --ink-muted: #4a5160;
  --ink-muted: oklch(42% 0.025 260);

  /* Accent: reminder ink-stamp rust/vermillion. Used deliberately, not as ambient decoration. */
  --stamp: #c1461e;
  --stamp: oklch(56% 0.18 35);
  --stamp-deep: #8f3416;
  --stamp-deep: oklch(45% 0.16 35);
  --stamp-ink: #fff6f0;
  --stamp-ink: oklch(97% 0.015 50);

  --rule: #d6d9e0;
  --rule: oklch(87% 0.008 260);
  --rule-strong: #b7bcc7;
  --rule-strong: oklch(76% 0.014 260);

  --radius-sm: 6px;
  --radius-md: 10px;

  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);

  /* z-index scale */
  --z-nav: 100;
  --z-nav-panel: 110;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

body {
  margin: 0;
  font-family: "Archivo", -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
}

.mono {
  font-family: "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;
}

a { color: inherit; }

/* ---------- Header ---------- */

header.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  background: var(--paper);
  border-bottom: 1px solid var(--rule-strong);
}

.header-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  position: relative;
}

.logo {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.01em;
  z-index: 2;
  font-family: "JetBrains Mono", monospace;
}

.logo span { color: var(--stamp); }

nav.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

nav.main-nav a {
  color: var(--ink-muted);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  padding: 9px 14px;
  border-radius: var(--radius-sm);
  transition: color 0.15s var(--ease-out-expo), background 0.15s var(--ease-out-expo);
  white-space: nowrap;
}

nav.main-nav a:hover { color: var(--ink); background: var(--paper-alt); }

nav.main-nav a.current-nav {
  color: var(--ink);
  background: var(--paper-alt);
}

nav.main-nav a.nav-cta {
  color: var(--paper);
  background: var(--stamp);
  font-weight: 700;
  margin-left: 8px;
}

nav.main-nav a.nav-cta:hover { background: var(--stamp-deep); color: var(--paper); }

.nav-toggle { display: none; }
.nav-burger {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--rule-strong);
  background: var(--paper);
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 2;
}
.nav-burger span,
.nav-burger span::before,
.nav-burger span::after {
  content: "";
  display: block;
  width: 18px;
  height: 2px;
  background: var(--ink);
  position: relative;
  transition: transform 0.15s var(--ease-out-expo);
}
.nav-burger span::before { position: absolute; top: -6px; }
.nav-burger span::after { position: absolute; top: 6px; }

/* ---------- Layout basics ---------- */

main {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px 96px;
}

section { padding: 72px 0; border-bottom: 1px solid var(--rule); }
section:last-child { border-bottom: none; }

h1, h2, h3 { color: var(--ink); letter-spacing: -0.015em; text-wrap: balance; }
h2 { font-size: clamp(1.5rem, 3vw, 1.9rem); font-weight: 700; margin: 0 0 12px; }
.section-lead { color: var(--ink-muted); max-width: 62ch; margin: 0 0 40px; font-size: 1.02rem; text-wrap: pretty; }

.section-meta {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.8rem;
  color: var(--stamp);
  font-weight: 500;
  margin-bottom: 10px;
  display: block;
}

/* ---------- Hero ---------- */

.hero { border-bottom: 1px solid var(--rule-strong); }

.hero-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 64px 24px 56px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero-copy {
  opacity: 0;
  transform: translateY(14px);
  animation: hero-in 0.6s var(--ease-out-expo) forwards;
}
.hero-art {
  opacity: 0;
  transform: translateY(14px);
  animation: hero-in 0.6s var(--ease-out-expo) 0.12s forwards;
}

@keyframes hero-in {
  to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  .hero-copy, .hero-art { animation: none; opacity: 1; transform: none; }
}

.hero h1 {
  font-size: clamp(2.1rem, 4.2vw, 3.4rem);
  font-weight: 900;
  line-height: 1.1;
  margin: 0 0 20px;
  text-wrap: balance;
}

.hero p.lead {
  font-size: 1.12rem;
  color: var(--ink-muted);
  max-width: 46ch;
  text-wrap: pretty;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 30px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.98rem;
  border: 1px solid transparent;
  transition: transform 0.15s var(--ease-out-expo), background 0.15s var(--ease-out-expo), border-color 0.15s var(--ease-out-expo);
}

.btn:hover { transform: translateY(-1px); }
@media (prefers-reduced-motion: reduce) {
  .btn:hover { transform: none; }
}

.btn-primary { background: var(--stamp); color: var(--paper); }
.btn-primary:hover { background: var(--stamp-deep); }

.btn-ghost { background: transparent; color: var(--ink); border-color: var(--rule-strong); }
.btn-ghost:hover { border-color: var(--ink); }

/* ---------- Stamp illustration ---------- */

.stamp-mark {
  position: absolute;
  transform: rotate(-8deg);
  border: 3px solid var(--stamp);
  border-radius: 10px;
  color: var(--stamp);
  font-family: "JetBrains Mono", monospace;
  font-weight: 700;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 5px 10px;
  background: var(--stamp-ink);
}

.hero-art svg { width: 100%; height: auto; max-width: 380px; display: block; margin: 0 auto; }

/* ---------- Feature ledger (rows, not cards) ---------- */

.ledger { border-top: 1px solid var(--rule-strong); }

.ledger-row {
  display: grid;
  grid-template-columns: minmax(0, 260px) 1fr;
  gap: 24px;
  padding: 28px 0;
  border-bottom: 1px solid var(--rule);
}

.ledger-row h3 { margin: 0; font-size: 1.05rem; font-weight: 700; }
.ledger-row p { margin: 0; color: var(--ink-muted); max-width: 58ch; }

/* ---------- Steps (real sequence: numbering earns its place) ---------- */

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--rule-strong);
  border-left: 1px solid var(--rule-strong);
}

.step {
  padding: 26px 22px;
  border-right: 1px solid var(--rule-strong);
  border-bottom: 1px solid var(--rule-strong);
}

.step .num {
  font-family: "JetBrains Mono", monospace;
  font-weight: 700;
  font-size: 1.6rem;
  color: var(--stamp);
  display: block;
  margin-bottom: 14px;
}

.step h3 { font-size: 0.98rem; margin: 0 0 6px; }
.step p { color: var(--ink-muted); font-size: 0.9rem; margin: 0; }

/* ---------- Prose sections ---------- */

.prose p { color: var(--ink-muted); font-size: 1.02rem; max-width: 68ch; text-wrap: pretty; }
.prose a { color: var(--stamp); font-weight: 600; }

/* ---------- CTA band (drenched: color carries the section) ---------- */

.cta-band {
  background: var(--stamp);
  color: var(--stamp-ink);
  border-radius: var(--radius-md);
  padding: 56px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(0deg, rgba(255,255,255,0.06) 0 1px, transparent 1px 28px);
  pointer-events: none;
}

.cta-band h2, .cta-band p { color: var(--stamp-ink); position: relative; }
.cta-band p { max-width: 52ch; margin: 0 auto 26px; }

.cta-band .btn-primary {
  background: var(--stamp-ink);
  color: var(--stamp-deep);
  position: relative;
}
.cta-band .btn-primary:hover { background: #fff; }

/* ---------- Legal pages (numbered articles: a real sequence) ---------- */

main.legal { max-width: 780px; }

.legal-hero {
  padding: 48px 0 32px;
  border-bottom: 1px solid var(--rule-strong);
}

.legal-hero h1 { font-size: clamp(1.8rem, 4vw, 2.4rem); font-weight: 900; margin: 0 0 8px; }
.legal-hero .updated { font-family: "JetBrains Mono", monospace; font-size: 0.85rem; color: var(--ink-muted); }

main.legal section {
  padding: 32px 0;
  border-bottom: 1px solid var(--rule);
}

main.legal h2 { font-size: 1.1rem; }
main.legal p, main.legal li { color: var(--ink-muted); }
main.legal a { color: var(--stamp); font-weight: 600; }

/* ---------- Footer ---------- */

footer.site-footer {
  border-top: 1px solid var(--rule-strong);
  background: var(--paper-alt);
  color: var(--ink-muted);
  font-size: 0.9rem;
}

.footer-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 44px 24px 32px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 24px;
}

.footer-brand .logo { display: inline-block; margin-bottom: 10px; }
.footer-brand p { max-width: 340px; color: var(--ink-muted); font-size: 0.9rem; }

.footer-col h4 {
  color: var(--ink);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 0 0 14px;
  font-family: "JetBrains Mono", monospace;
  font-weight: 500;
}

.footer-col a {
  display: block;
  color: var(--ink-muted);
  text-decoration: none;
  margin-bottom: 10px;
  font-size: 0.9rem;
}

.footer-col a:hover { color: var(--ink); }

.footer-bottom {
  max-width: 1120px;
  margin: 0 auto;
  padding: 18px 24px 28px;
  border-top: 1px solid var(--rule);
  color: var(--ink-muted);
  font-size: 0.82rem;
  font-family: "JetBrains Mono", monospace;
}

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-art { order: -1; max-width: 220px; margin: 0 auto; }
  .steps { grid-template-columns: 1fr 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .ledger-row { grid-template-columns: 1fr; gap: 8px; }
}

@media (max-width: 700px) {
  .nav-burger { display: flex; }

  nav.main-nav {
    position: fixed;
    inset: 74px 16px auto 16px;
    flex-direction: column;
    align-items: stretch;
    background: var(--paper);
    border: 1px solid var(--rule-strong);
    border-radius: var(--radius-md);
    padding: 8px;
    gap: 2px;
    opacity: 0;
    transform: translateY(-8px);
    pointer-events: none;
    transition: opacity 0.15s var(--ease-out-expo), transform 0.15s var(--ease-out-expo);
    z-index: var(--z-nav-panel);
    box-shadow: 0 12px 32px rgba(18, 21, 28, 0.14);
  }

  nav.main-nav a { padding: 13px 14px; border-radius: var(--radius-sm); }
  nav.main-nav a.nav-cta { margin-left: 0; text-align: center; }

  .nav-toggle:checked ~ nav.main-nav {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  @media (prefers-reduced-motion: reduce) {
    nav.main-nav { transition: none; }
  }

  section { padding: 48px 0; }
  .steps { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
}