/* Twopar — shared styles
   ---------------------------------------------------------------
   A clubhouse scorecard aesthetic: cream paper, fairway ink,
   classic serif display + clean sans body + mono numerics.
   --------------------------------------------------------------- */

:root {
  /* Ink + paper */
  --ink:        oklch(0.20 0.018 150);
  --ink-2:      oklch(0.32 0.018 150);
  --ink-soft:   oklch(0.46 0.015 150);
  --ink-muted:  oklch(0.60 0.012 150);
  --paper:      oklch(0.972 0.012 90);
  --paper-2:    oklch(0.945 0.018 88);
  --paper-3:    oklch(0.915 0.022 88);
  --rule:       oklch(0.86 0.020 95);
  --rule-soft:  oklch(0.91 0.015 90);

  /* Course */
  --fairway:        oklch(0.42 0.085 148);
  --fairway-deep:   oklch(0.28 0.060 148);
  --fairway-soft:   oklch(0.62 0.080 148);
  --green-tint:     oklch(0.93 0.040 148);
  --flag:           oklch(0.55 0.180 28);
  --flag-deep:      oklch(0.42 0.150 28);
  --sand:           oklch(0.88 0.045 85);
  --pencil:         oklch(0.40 0.030 250);

  /* Type */
  --serif: "Newsreader", "Source Serif 4", Georgia, "Times New Roman", serif;
  --sans: "Geist", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: "JetBrains Mono", "SF Mono", ui-monospace, Menlo, Consolas, monospace;

  /* Layout */
  --maxw: 1140px;
  --maxw-prose: 720px;
  --radius: 4px;
  --radius-card: 6px;
  --radius-lg: 10px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  background-image:
    radial-gradient(ellipse 1200px 600px at 10% -10%, oklch(0.95 0.025 90 / 0.9), transparent 60%),
    radial-gradient(ellipse 1000px 500px at 100% 10%, oklch(0.94 0.030 95 / 0.7), transparent 60%);
  background-attachment: fixed;
}

a {
  color: var(--fairway);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  text-decoration-color: oklch(0.42 0.085 148 / 0.35);
  transition: color .15s ease, text-decoration-color .15s ease;
}
a:hover {
  color: var(--fairway-deep);
  text-decoration-color: var(--fairway);
}

::selection { background: oklch(0.42 0.085 148 / 0.18); color: var(--ink); }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 1.5rem; }
.container--prose { max-width: var(--maxw-prose); }

/* --- Top bar -------------------------------------------------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(10px) saturate(120%);
  -webkit-backdrop-filter: blur(10px) saturate(120%);
  background: oklch(0.972 0.012 90 / 0.78);
  border-bottom: 1px solid var(--rule);
}
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--ink);
}
.brand-mark {
  width: 28px; height: 28px;
  border-radius: 7px;
  box-shadow: 0 1px 0 oklch(0 0 0 / 0.06), 0 2px 6px oklch(0 0 0 / 0.08);
}
.brand-name {
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.brand-name em { font-style: italic; color: var(--fairway); font-weight: 500; }

.nav {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}
.nav a {
  font-size: 0.9rem;
  color: var(--ink-soft);
  text-decoration: none;
  font-weight: 500;
}
.nav a:hover { color: var(--ink); }
.nav .nav-cta {
  font-family: var(--mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--paper);
  background: var(--ink);
  padding: 0.5rem 0.85rem;
  border-radius: 999px;
}
.nav .nav-cta:hover { background: var(--fairway-deep); color: var(--paper); }

@media (max-width: 640px) {
  .nav a:not(.nav-cta) { display: none; }
}

/* --- Eyebrow / labels ----------------------------------------- */
.eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--ink-muted);
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
}
.eyebrow::before {
  content: "";
  display: inline-block;
  width: 22px; height: 1px;
  background: var(--ink-muted);
}

/* --- Footer --------------------------------------------------- */
.footer {
  margin-top: 5rem;
  background: var(--ink);
  color: oklch(0.85 0.02 90);
  padding: 3.5rem 0 2rem;
  position: relative;
  overflow: hidden;
}
.footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(
      90deg,
      transparent 0 24px,
      oklch(1 0 0 / 0.025) 24px 25px
    );
  pointer-events: none;
}
.footer-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 2.5rem;
  align-items: start;
}
.footer-brand .brand-name { color: var(--paper); font-size: 1.4rem; }
.footer-brand .brand-mark { width: 36px; height: 36px; border-radius: 8px; }
.footer-tag {
  margin: 0.85rem 0 0;
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.05rem;
  color: oklch(0.78 0.025 90);
  max-width: 280px;
}
.footer h4 {
  margin: 0 0 1rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: oklch(0.65 0.020 90);
  font-weight: 500;
}
.footer ul { list-style: none; padding: 0; margin: 0; }
.footer li { margin-bottom: 0.6rem; }
.footer a {
  color: oklch(0.88 0.020 90);
  text-decoration: none;
  font-size: 0.95rem;
}
.footer a:hover { color: var(--paper); text-decoration: underline; }
.footer-bottom {
  position: relative;
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid oklch(1 0 0 / 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: oklch(0.62 0.020 90);
  flex-wrap: wrap;
  gap: 1rem;
}
.footer-bottom em {
  font-family: var(--serif);
  font-style: italic;
  color: oklch(0.78 0.025 90);
}
@media (max-width: 800px) {
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .footer-brand { grid-column: 1 / -1; }
}

/* --- Doc / prose pages ---------------------------------------- */
.doc-hero {
  padding: 4rem 0 2.5rem;
  border-bottom: 1px solid var(--rule);
}
.doc-hero .eyebrow { margin-bottom: 1.25rem; }
.doc-hero h1 {
  font-family: var(--serif);
  font-size: clamp(2.5rem, 5vw, 3.6rem);
  letter-spacing: -0.02em;
  font-weight: 500;
  margin: 0 0 0.5rem;
  line-height: 1.05;
}
.doc-hero h1 em { font-style: italic; color: var(--fairway); font-weight: 400; }
.doc-hero .meta {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--ink-muted);
  letter-spacing: 0.04em;
}

.prose {
  padding: 3rem 0 2rem;
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--ink-2);
}
.prose .lede {
  font-family: var(--serif);
  font-size: 1.35rem;
  line-height: 1.5;
  color: var(--ink);
  margin: 0 0 2.5rem;
  font-weight: 400;
}
.prose h2 {
  font-family: var(--serif);
  font-size: 1.55rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 3rem 0 0.9rem;
  padding-top: 2rem;
  border-top: 1px solid var(--rule);
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
}
.prose h2::before {
  content: "§" counter(section-h2);
  counter-increment: section-h2;
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 400;
  color: var(--fairway);
  letter-spacing: 0.04em;
  padding-top: 0.4em;
}
.prose { counter-reset: section-h2; }
.prose h2:first-of-type { border-top: none; padding-top: 0; margin-top: 0; }
.prose h3 {
  font-family: var(--sans);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--ink);
  margin: 1.5rem 0 0.5rem;
  letter-spacing: -0.005em;
}
.prose p { margin: 0 0 1rem; }
.prose ul {
  list-style: none;
  padding: 0;
  margin: 0 0 1.25rem;
}
.prose ul li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.7rem;
  color: var(--ink-2);
}
.prose ul li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.7em;
  width: 7px; height: 7px;
  background: var(--flag);
  clip-path: polygon(0 0, 100% 35%, 0 70%);
  /* tiny flag triangle */
}
.prose ul li strong { color: var(--ink); font-weight: 600; }

/* Callout block */
.callout {
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-left: 3px solid var(--fairway);
  border-radius: var(--radius-card);
  padding: 1.1rem 1.35rem;
  margin: 1.5rem 0 2rem;
}
.callout .callout-label {
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--fairway-deep);
  margin: 0 0 0.4rem;
  font-weight: 500;
}
.callout p { margin: 0; color: var(--ink-2); }
.callout a { font-weight: 600; }

@media (max-width: 600px) {
  .doc-hero { padding: 2.5rem 0 1.5rem; }
  .prose { padding: 2rem 0 1rem; font-size: 1rem; }
  .prose .lede { font-size: 1.15rem; }
  .prose h2 { font-size: 1.3rem; }
}