/* ============================================================
   PokerStacker · marketing.css
   Shared tokens, base reset, topbar, and marketing components.
   Linked by: index.html, about.html, split-the-pot.html, guide.html
   ============================================================ */

/* Tokens */
:root,
body[data-skin="felt"] {
  --bg:          oklch(20% 0.020 155);
  --bg-2:        oklch(24% 0.022 155);
  --surface:     oklch(28% 0.025 155);
  --surface-2:   oklch(33% 0.028 155);
  --surface-3:   oklch(40% 0.030 155);
  --border:      oklch(38% 0.028 155);
  --border-soft: oklch(30% 0.024 155);
  --fg:          oklch(95% 0.012 80);
  --fg-strong:   oklch(98% 0.010 80);
  --muted:       oklch(74% 0.018 85);
  --muted-2:     oklch(56% 0.020 85);
  --accent:      oklch(78% 0.105 85);
  --accent-dim:  oklch(60% 0.085 85);
  --accent-ink:  oklch(12% 0.005 155);
  --accent-on:   oklch(12% 0.005 155);
  --danger:      oklch(56% 0.135 25);
  --danger-dim:  oklch(40% 0.110 25);
  --success:     oklch(74% 0.130 145);
  --info:        oklch(68% 0.080 240);
  --suit-red:    oklch(60% 0.165 25);
  --suit-black:  var(--fg);
  --font-display: 'Instrument Serif', 'Cormorant Garamond', Georgia, serif;
  --font-sans:    'Geist', system-ui, -apple-system, sans-serif;
  --font-mono:    'Geist Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  --sp-1:  4px; --sp-2:  8px; --sp-3:  12px; --sp-4:  16px; --sp-5:  20px;
  --sp-6:  24px; --sp-8:  32px; --sp-10: 40px; --sp-12: 48px;
  --sp-16: 64px; --sp-20: 80px; --sp-24: 96px;
  --r-sm:   6px; --r-md:   12px; --r-lg:   20px; --r-pill: 999px;
  --shadow-0: 0 0 0 1px var(--border-soft);
  --shadow-1: 0 1px 0 0 var(--border-soft), 0 8px 24px -16px rgba(0,0,0,0.6);
  --shadow-2: 0 1px 0 0 var(--border), 0 24px 60px -28px rgba(0,0,0,0.75);
  --content-max: 1200px;
  --doc-gutter:  clamp(24px, 6vw, 64px);
  --section-pad: clamp(80px, 12vw, 160px);
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
}

/* Base reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body {
  margin: 0; padding: 0;
  background: var(--bg); color: var(--fg);
  font-family: var(--font-sans); font-size: 16px; line-height: 1.5;
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
  transition: background 0.4s var(--ease), color 0.4s var(--ease);
}
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  min-height: 100vh;
  overflow-x: hidden;
}
::selection { background: var(--accent); color: var(--accent-ink); }
a { color: inherit; }
button { font: inherit; color: inherit; }
img { display: block; max-width: 100%; }
code { font-family: var(--font-mono); font-size: 0.92em; }

/* Topbar */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(20px);
  background: color-mix(in oklab, var(--bg) 80%, transparent);
  border-bottom: 1px solid var(--border-soft);
  padding: 18px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--fg);
  text-decoration: none;
  font-family: var(--font-display);
  font-size: 22px;
  text-transform: none;
}
.brand svg { color: var(--accent); }
.brand em { font-style: italic; color: var(--accent); }
.topbar nav {
  display: inline-flex;
  gap: 28px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  align-items: center;
}
.topbar nav a {
  color: var(--muted);
  text-decoration: none;
  position: relative;
  padding-bottom: 6px;
}
.topbar nav a::after {
  content: '';
  position: absolute;
  left: 0; right: 0;
  bottom: 0;
  height: 1px;
  background: var(--accent);
  opacity: 0;
}
.topbar nav a:hover { color: var(--accent); }
.topbar nav a.is-active { color: var(--accent); }
.topbar nav a.is-active::after { opacity: 1; }
.topbar nav a.cta {
  background: var(--accent);
  color: var(--accent-on);
  border: 1px solid var(--accent);
  padding: 8px 18px;
  border-radius: 999px;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 14px;
  letter-spacing: 0;
  text-transform: none;
  transition: background 0.15s, transform 0.15s, box-shadow 0.2s;
  box-shadow: 0 8px 20px -8px color-mix(in oklab, var(--accent) 40%, transparent);
}
.topbar nav a.cta::after { display: none; }
.topbar nav a.cta:hover {
  background: color-mix(in oklab, var(--accent) 88%, white 12%);
  transform: translateY(-1px);
  box-shadow: 0 10px 24px -8px color-mix(in oklab, var(--accent) 50%, transparent);
}
.topbar nav a.cta.is-active {
  background: color-mix(in oklab, var(--accent) 18%, transparent);
  color: var(--accent);
  border-color: var(--accent-dim);
  box-shadow: none;
}

/* Accessibility — visually hidden but readable by screen readers and crawlers */
.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;
}

/* Hero */
.hero {
  padding: 80px 40px 60px;
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
  isolation: isolate;
}
.hero__suit {
  position: absolute;
  font-family: var(--font-display);
  font-style: italic;
  line-height: 0.8;
  color: color-mix(in oklab, var(--accent) 7%, transparent);
  z-index: -1;
  user-select: none;
  pointer-events: none;
}
.hero__eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 24px;
  display: inline-flex;
  align-items: center;
  gap: 12px;
}
.hero__eyebrow::before {
  content: '';
  width: 32px;
  height: 1px;
  background: var(--accent);
}
.hero__title {
  font-family: var(--font-display);
  font-size: clamp(56px, 8vw, 112px);
  font-weight: 400;
  line-height: 0.94;
  letter-spacing: -0.03em;
  margin-bottom: 28px;
  text-wrap: balance;
}
.hero__title em { font-style: italic; color: var(--accent); }
.hero__lede {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(20px, 2.2vw, 28px);
  line-height: 1.35;
  color: var(--muted);
  max-width: 640px;
  margin-bottom: 24px;
}
.hero__lede strong { color: var(--fg); font-weight: 400; font-style: italic; }

/* CTA */
.hero__cta-row {
  display: inline-flex;
  align-items: center;
  gap: 24px;
}
.cta-primary {
  display: inline-block;
  padding: 18px 32px;
  background: var(--accent);
  color: var(--accent-on);
  border-radius: var(--r-pill);
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(20px, 2vw, 26px);
  text-decoration: none;
  transition: transform 0.15s, box-shadow 0.2s;
  box-shadow: 0 16px 32px -10px color-mix(in oklab, var(--accent) 55%, transparent);
}
.cta-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 40px -10px color-mix(in oklab, var(--accent) 65%, transparent);
}
.cta-secondary {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
}
.cta-secondary:hover { color: var(--accent); }

/* Divider */
.divider {
  max-width: 1200px;
  margin: 60px auto;
  padding: 0 40px;
}
.divider__rule {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 18px;
  align-items: center;
  color: var(--muted-2);
}
.divider__rule::before, .divider__rule::after {
  content: '';
  height: 1px;
  background: var(--border-soft);
}
.divider__rule span {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 22px;
  color: var(--accent);
}

/* Manifesto */
.manifesto {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.credo {
  padding: 32px 28px;
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-lg);
  display: flex;
  flex-direction: column;
  gap: 14px;
  position: relative;
  transition: border-color 0.2s, transform 0.2s;
}
.credo:hover {
  border-color: var(--accent-dim);
  transform: translateY(-2px);
}
.credo__roman {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 36px;
  line-height: 1;
  color: var(--accent);
}
.credo__title {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 400;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--fg);
}
.credo__title em { font-style: italic; color: var(--accent); }
.credo__body {
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.55;
  color: var(--muted);
}

/* Final CTA */
.final-cta {
  max-width: 1200px;
  margin: 60px auto;
  padding: 0 40px;
  text-align: center;
}
.final-cta__title {
  font-family: var(--font-display);
  font-size: clamp(48px, 7vw, 96px);
  font-weight: 400;
  line-height: 0.95;
  letter-spacing: -0.03em;
  margin-bottom: 36px;
}
.final-cta__title em { font-style: italic; color: var(--accent); }

/* Footer (simple — back-link) */
footer.footer {
  padding: 40px;
  text-align: center;
  border-top: 1px solid var(--border-soft);
}
footer.footer a {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
footer.footer a:hover { color: var(--accent); }

/* Mobile — shared components */
@media (max-width: 880px) {
  .topbar { padding: 14px 20px; }
  .topbar nav { gap: 16px; }
  .topbar nav a:not(.cta) { display: none; }
  .topbar nav a.cta {
    padding: 7px 14px;
    font-size: 12px;
  }

  .hero { padding: 56px 20px 40px; }
  .hero__title { line-height: 0.95; }

  .divider { margin: 40px auto; padding: 0 20px; }

  .manifesto {
    grid-template-columns: 1fr;
    padding: 0 20px;
    gap: 16px;
  }
  .credo { padding: 24px 22px; }

  .final-cta { padding: 0 20px; }

  footer.footer { padding: 32px 20px; }
}