/* ────────────────────────────────────────────────────────────
   MenuBase | Learn / Playbook styles
   Brand-consistent: mirrors the main site's top ribbon,
   floating dock, footer, button system, and typography scale.
   Article-specific typography lives at the bottom.
   ──────────────────────────────────────────────────────────── */

:root {
  --bg:        #0A0A0C;
  --bg-soft:   #15151A;
  --bg-elev:   #1E1E24;
  --line:      #2E2E36;
  --line-2:    #3E3E48;
  --ink:       #F2F2EE;
  --ink-2:     #BDBDBE;
  --ink-3:     #8C8C90;
  --grey:      #8C8C90;
  --grey-2:    #6E6E72;
  --lime:      #BCF125;
  --lime-deep: #A6D413;
  --lime-soft: #2A3E18;
  --ink-deep:  #050507;
  --font-display: 'Hanken Grotesk', system-ui, sans-serif;
  --font-body:    'Geist', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', ui-monospace, monospace;
  --r-md: 8px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: 'ss01', 'cv11';
  letter-spacing: -0.005em;
}
a { color: inherit; text-decoration: none; }
::selection { background: var(--lime); color: #1A1A1A; }

/* ─── ANIMATED CANVAS BG (menubase-bg.js) ─── */
#mb-bg { position: fixed; inset: 0; z-index: 0; pointer-events: none; display: block; opacity: 0.7; }
main, .top-ribbon, nav.top, footer.foot { position: relative; z-index: 1; }

/* ─── LEGIBILITY CONTRAST FIXES (WCAG AA: 4.5:1 body, 3:1 large) ─── */
.eyebrow                                        { color: var(--ink-2) !important; }
.hub-intro p                                    { color: var(--ink-2) !important; }
.article-wrap p,
.article-wrap ul,
.article-wrap ol                                { color: var(--ink-2) !important; }
.foot-brand p                                   { color: var(--ink-2) !important; }
.foot-col a                                     { color: var(--ink-2) !important; }
.article-card p                                 { color: var(--ink-2) !important; }
.article-card .card-meta                        { color: var(--ink-2) !important; }

/* ─── LEGIBILITY SCRIM ─── */
.has-bg-scrim { position: relative; z-index: 1; }
.has-bg-scrim::before {
  content: '';
  position: absolute;
  inset: -24px -36px;
  z-index: -1;
  pointer-events: none;
  background: radial-gradient(120% 130% at 50% 50%,
    var(--bg) 45%,
    color-mix(in oklab, var(--bg) 55%, transparent) 72%,
    transparent 100%);
}
.has-bg-scrim.scrim-soft::before {
  background: radial-gradient(120% 130% at 50% 50%,
    var(--bg-soft) 45%,
    color-mix(in oklab, var(--bg-soft) 55%, transparent) 72%,
    transparent 100%);
}
.has-bg-scrim.scrim-dark::before {
  background: radial-gradient(120% 130% at 50% 50%,
    var(--ink-deep) 45%,
    color-mix(in oklab, var(--ink-deep) 55%, transparent) 72%,
    transparent 100%);
}

/* ─── BUTTONS (mirror main site) ─── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 24px;
  font-weight: 600; font-size: 14.5px;
  border: 1.5px solid transparent;
  transition: transform 120ms, background 150ms, border-color 150ms, color 150ms;
  cursor: pointer;
  font-family: var(--font-body);
  letter-spacing: -0.005em;
}
.btn:active { transform: translateY(1px); }
.btn-dark  { background: var(--ink-deep); color: var(--ink); border-color: var(--ink-deep); }
.btn-dark:hover { background: #000; }
.btn-lime  { background: var(--lime); color: #1A1A1A; border-color: var(--lime); }
.btn-lime:hover { background: var(--lime-deep); border-color: var(--lime-deep); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--ink); }
.btn-ghost:hover { background: var(--ink); color: var(--bg); }
.btn-lg { padding: 15px 28px; font-size: 15px; }

/* ─── TOP RIBBON (logo + Login - exact mirror of main site) ─── */
.top-ribbon {
  position: sticky;
  top: 0;
  z-index: 49;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.top-ribbon-inner {
  max-width: 1320px;
  margin: 0 auto;
  padding: 14px 28px;
  display: flex;
  align-items: center;
}
.top-ribbon .brand { display: inline-flex; align-items: center; text-decoration: none; }
.top-ribbon .brand .brand-lockup {
  height: 38px;
  width: auto;
  display: block;
  filter: invert(1) hue-rotate(180deg);
}
.top-ribbon-login {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 18px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 13px;
  color: var(--ink);
  border: 1.5px solid var(--ink);
  text-decoration: none;
  transition: background 150ms, color 150ms;
  letter-spacing: -0.005em;
}
.top-ribbon-login:hover { background: var(--ink); color: var(--bg); }
.top-ribbon-login .arr { transition: transform 150ms; }
.top-ribbon-login:hover .arr { transform: translateX(2px); }

/* ─── FLOATING BOTTOM DOCK (exact mirror of main site) ─── */
nav.top {
  position: fixed;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 50;
  background: rgba(26,26,26,0.92);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 999px;
  box-shadow: 0 20px 50px rgba(0,0,0,0.25), 0 6px 16px rgba(0,0,0,0.15);
  max-width: calc(100vw - 24px);
}
.nav-inner {
  padding: 4px;
  display: flex; align-items: center; gap: 6px;
}
.nav-links { display: flex; gap: 0; padding-left: 8px; }
.nav-links a {
  padding: 6px 12px;
  font-size: 13px; color: rgba(255,255,255,0.7);
  font-weight: 500;
  border-radius: 999px;
  transition: color 120ms, background 120ms;
  letter-spacing: -0.005em;
}
.nav-links a:hover { color: #fff; background: rgba(255,255,255,0.08); }
.nav-links a.current { color: #1A1A1A; background: var(--lime); }
.nav-links a.current:hover { background: var(--lime-deep); }
.nav-cta { display: flex; align-items: center; gap: 4px; }
.nav-cta .btn {
  padding: 6px 14px; font-size: 12.5px;
  border-radius: 999px; border-width: 1px;
  font-weight: 600;
  letter-spacing: 0.04em; text-transform: uppercase;
}

/* ─── EYEBROW (mirror main site) ─── */
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-mono); font-size: 11px;
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--grey); font-weight: 600;
  margin-bottom: 24px;
}
.eyebrow::before {
  content: ''; width: 8px; height: 8px;
  background: var(--lime-deep);
  flex-shrink: 0;
}

/* ─── HUB INTRO ─── */
.hub-intro {
  max-width: 1100px; margin: 0 auto;
  padding: 96px 28px 40px;
  text-align: left;
}
.hub-intro h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(38px, 5.4vw, 62px);
  line-height: 1.02;
  letter-spacing: -0.035em;
  margin: 0 0 24px;
  max-width: 18ch;
}
.hub-intro h1 em { font-style: normal; color: var(--lime-deep); }
.hub-intro p {
  font-size: 18px;
  color: var(--grey);
  max-width: 64ch;
  line-height: 1.55;
}

/* ─── ARTICLE CARD GRID ─── */
.hub-grid {
  max-width: 1100px; margin: 0 auto;
  padding: 24px 28px 140px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.article-card {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 32px 28px;
  display: flex; flex-direction: column;
  transition: border-color 250ms ease, transform 250ms ease, box-shadow 250ms ease;
}
.article-card:hover { border-color: var(--lime-deep); transform: translateY(-2px); }
.article-card .card-eyebrow {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lime-deep);
  font-weight: 700;
  margin-bottom: 14px;
}
.article-card h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 24px;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
  color: var(--ink);
}
.article-card p {
  font-size: 14.5px;
  color: var(--grey);
  margin: 0 0 24px;
  line-height: 1.55;
  flex: 1;
}
.article-card .card-meta {
  display: flex; gap: 12px; align-items: center;
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--grey-2);
  text-transform: uppercase;
  letter-spacing: 0.14em;
}
.article-card .card-cta {
  margin-top: 18px;
  font-weight: 600;
  font-size: 14px;
  color: var(--ink);
}

/* ─── ARTICLE LAYOUT ─── */
.article-wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 56px 24px 140px;
}
.crumb {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--grey);
  margin-bottom: 28px;
}
.crumb a { color: var(--lime-deep); font-weight: 600; }
.article-wrap h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(34px, 4.8vw, 52px);
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin: 0 0 22px;
  color: var(--ink);
}
.article-meta {
  display: flex; gap: 16px; flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--grey-2);
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}
.lede {
  font-size: 20px;
  color: var(--ink-2);
  line-height: 1.5;
  margin: 0 0 36px;
  font-weight: 500;
}
.article-wrap p {
  font-size: 17px;
  line-height: 1.65;
  margin: 0 0 20px;
  color: var(--ink-2);
}
.article-wrap p strong { color: var(--ink); font-weight: 600; }
.article-wrap h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 28px;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 56px 0 18px;
  color: var(--ink);
}
.article-wrap h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.3;
  margin: 36px 0 14px;
  color: var(--ink);
}
.article-wrap ul, .article-wrap ol {
  margin: 0 0 24px;
  padding-left: 24px;
  color: var(--ink-2);
  font-size: 17px;
  line-height: 1.65;
}
.article-wrap li { margin-bottom: 10px; }
.article-wrap li strong { color: var(--ink); font-weight: 600; }

/* ─── ARTICLE ACCENT BLOCKS (mirror main site pullquote pattern) ─── */
.pullquote {
  margin: 36px 0;
  padding: 24px 28px;
  border-left: 4px solid var(--lime-deep);
  background: var(--bg-soft);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  line-height: 1.3;
  letter-spacing: -0.015em;
  color: var(--ink);
}
.formula {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 18px 22px;
  margin: 22px 0;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--ink);
}
.tactic-test {
  background: var(--lime-soft);
  border-left: 4px solid var(--lime-deep);
  padding: 14px 18px;
  margin: 14px 0 22px;
  font-size: 15px;
  color: var(--ink);
  border-radius: 0 var(--r-md) var(--r-md) 0;
}
.tactic-test strong { color: var(--ink); }

/* ─── INLINE CTA BLOCK (dark, brand-consistent with cta-shell on main) ─── */
.cta-block {
  background: var(--ink-deep);
  color: var(--ink);
  padding: 40px 32px;
  border-radius: var(--r-md);
  margin: 56px 0 24px;
}
.cta-block h3 {
  color: #fff;
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 26px;
  letter-spacing: -0.02em;
  line-height: 1.2;
}
.cta-block p {
  color: rgba(255,255,255,0.78);
  margin: 0 0 22px;
  font-size: 16px;
  line-height: 1.55;
}
.cta-block .btn { font-size: 14px; padding: 14px 26px; }

/* ─── FOOTER (mirror main site structure) ─── */
footer.foot {
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
  padding: 64px 28px 36px;
}
.foot-inner {
  max-width: 1320px; margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 56px;
}
.foot-brand .brand { display: inline-flex; align-items: center; text-decoration: none; }
.foot-brand .brand .brand-lockup {
  height: 38px; width: auto; display: block;
  filter: invert(1) hue-rotate(180deg);
}
.foot-brand p {
  font-size: 14px;
  color: var(--grey);
  margin: 14px 0 0;
  max-width: 320px;
  line-height: 1.55;
}
.foot-col h5 {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--grey);
  font-weight: 600;
  margin: 0 0 18px;
}
.foot-col a {
  display: block;
  font-size: 14.5px;
  color: var(--ink-2);
  margin-bottom: 10px;
  transition: color 120ms;
}
.foot-col a:hover { color: var(--ink); }
.foot-bottom {
  max-width: 1320px; margin: 56px auto 0;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  display: flex; justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--grey-2);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  flex-wrap: wrap; gap: 12px;
}

/* ─── RESPONSIVE ─── */
@media (max-width: 900px) {
  .foot-inner { grid-template-columns: 1.4fr 1fr 1fr; }
  .foot-col:nth-child(2) { grid-column: 2; }
}
@media (max-width: 720px) {
  .top-ribbon-inner { padding: 12px 18px; }
  .top-ribbon .brand .brand-lockup { height: 30px; }
  .top-ribbon-login { padding: 8px 14px; font-size: 12.5px; }

  nav.top { bottom: 12px; left: 12px; right: 12px; transform: none; max-width: none; }
  .nav-links { display: none; }
  .nav-cta { width: 100%; margin: 0; }
  .nav-cta .btn { flex: 1; justify-content: center; }

  .hub-intro { padding: 56px 18px 24px; }
  .hub-grid { grid-template-columns: 1fr; padding: 16px 18px 120px; gap: 14px; }
  .article-card { padding: 26px 22px; }
  .article-card h2 { font-size: 22px; }

  .article-wrap { padding: 32px 18px 120px; }
  .article-wrap h1 { font-size: 30px; }
  .article-wrap h2 { font-size: 22px; margin: 40px 0 14px; }
  .article-wrap h3 { font-size: 18px; margin: 28px 0 12px; }
  .lede { font-size: 17px; }
  .article-wrap p, .article-wrap ul, .article-wrap ol { font-size: 16px; }
  .pullquote { font-size: 18px; padding: 20px 22px; }
  .cta-block { padding: 28px 22px; }
  .cta-block h3 { font-size: 22px; }

  footer.foot { padding: 48px 22px 28px; }
  .foot-inner { grid-template-columns: 1fr; gap: 32px; }
  .foot-bottom { margin-top: 36px; }
}

/* Touch device: suppress hover transforms */
@media (hover: none) {
  .article-card:hover { transform: none; }
}