/* =====================================================
   The AI Course nav — ported from the gamut exploration
   (awr-gamut-exploration.vercel.app), exact replica minus
   the pricing link. Self-contained: scoped vars, no
   dependency on the gamut stylesheet.
   ===================================================== */

.pillnav {
  /* gamut tokens, scoped so they don't leak into the page */
  --tac-ink: #121212;
  --tac-ink-2: #7E7E7E;
  --tac-ink-3: #AAAAAA;
  --tac-blue: #173EF5;
  --tac-blue-08: rgba(23, 62, 245, 0.08);
  --tac-line: #E8E8EC;
  --tac-mono: 'Space Mono', 'Courier New', monospace;
  --tac-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --tac-ease: cubic-bezier(0.22, 1, 0.36, 1);

  position: fixed; top: 0; left: 0; right: 0; width: 100%;
  z-index: 100; display: flex; align-items: center; gap: 16px;
  padding: 13px max(20px, calc((100% - 1120px) / 2));
  background: #fff; color: var(--tac-ink);
  border-bottom: 1px solid rgba(18, 18, 18, 0.08);
  transition: box-shadow 0.28s ease;
}
.pillnav.is-scrolled { box-shadow: 0 6px 22px rgba(0, 0, 0, 0.1); }

/* offset the page below the fixed bar */
body { padding-top: 58px; }

.pillnav__brand { position: relative; text-decoration: none; line-height: 1; white-space: nowrap; flex-shrink: 0; }
.pillnav__brand-img { height: 20px; width: auto; display: block; visibility: hidden; }
.pillnav__brand-img.is-on { visibility: visible; }
.pillnav__brand-img + .pillnav__brand-img { position: absolute; top: 0; left: 0; }

.pillnav__links {
  position: absolute; left: 50%; transform: translateX(-50%);
  display: flex; align-items: center; gap: 24px;
}
.pillnav__links a {
  font-family: var(--tac-mono); font-size: 0.72rem; text-transform: uppercase;
  letter-spacing: 0.08em; text-decoration: none; color: var(--tac-ink-2);
  transition: color 0.25s; white-space: nowrap;
}
.pillnav__links a:hover { color: var(--tac-blue); }

/* ---------- /offers dropdown ---------- */
.nav-offers { position: relative; }
.nav-offers__label { cursor: pointer; white-space: nowrap; }
.nav-offers__label i { font-style: normal; font-size: 0.55rem; margin-left: 3px; display: inline-block; transition: transform 0.3s var(--tac-ease); }
.nav-offers:hover .nav-offers__label i, .nav-offers:focus-within .nav-offers__label i { transform: rotate(180deg); }
.nav-dd {
  position: absolute; top: calc(100% + 18px); left: 50%;
  transform: translateX(-50%) translateY(10px);
  width: 350px; padding: 8px;
  background: rgba(255, 255, 255, 0.94);
  -webkit-backdrop-filter: blur(16px); backdrop-filter: blur(16px);
  border: 1px solid var(--tac-line); border-radius: 14px;
  box-shadow: 0 22px 60px rgba(18, 18, 18, 0.13);
  opacity: 0; pointer-events: none;
  transition: opacity 0.3s var(--tac-ease), transform 0.3s var(--tac-ease);
}
.nav-dd::before { content: ''; position: absolute; top: -20px; left: 0; right: 0; height: 20px; }
.nav-offers:hover .nav-dd, .nav-offers:focus-within .nav-dd {
  opacity: 1; transform: translateX(-50%) translateY(0); pointer-events: auto;
}
.pillnav__links a.nav-dd__row {
  display: block; padding: 12px 14px; border-radius: 9px; text-decoration: none;
  opacity: 0; transform: translateY(-5px);
  transition: opacity 0.3s var(--tac-ease), transform 0.3s var(--tac-ease), background 0.2s;
  white-space: normal; text-transform: none; letter-spacing: normal;
  font-family: var(--tac-body); font-size: 0.85rem; color: var(--tac-ink);
}
.nav-offers:hover .nav-dd__row, .nav-offers:focus-within .nav-dd__row { opacity: 1; transform: none; }
.nav-offers:hover .nav-dd__row:nth-child(1) { transition-delay: 0.04s; }
.nav-offers:hover .nav-dd__row:nth-child(2) { transition-delay: 0.1s; }
.nav-offers:hover .nav-dd__row:nth-child(3) { transition-delay: 0.16s; }
.nav-dd__row:hover { background: var(--tac-blue-08); }
.nav-dd__top { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; }
.nav-dd__name { font-family: var(--tac-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--tac-ink); }
.nav-dd__row:hover .nav-dd__name::before { content: '◆ '; color: var(--tac-blue); font-size: 0.55rem; }
.nav-dd__hint { font-family: var(--tac-mono); font-size: 0.62rem; color: var(--tac-blue); white-space: nowrap; }
.nav-dd__desc { display: block; margin-top: 3px; font-family: var(--tac-body); font-size: 0.78rem; color: var(--tac-ink-2); line-height: 1.45; }

/* ---------- Get access CTA (gamut btn--blue btn--sm, namespaced
   to avoid the landing site's own .btn styles) ---------- */
.pillnav__cta {
  display: inline-flex; align-items: center; justify-content: center;
  margin-left: auto; flex-shrink: 0; line-height: 1;
  font-family: var(--tac-mono); font-size: 0.68rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.08em; text-decoration: none;
  padding: 9px 18px; border-radius: 6px; cursor: pointer;
  background: var(--tac-blue); color: #FFFFFF;
  box-shadow: inset -2px -2px 0 0 rgba(0, 0, 0, 0.28);
  transition: transform 0.25s var(--tac-ease), box-shadow 0.25s var(--tac-ease);
  white-space: nowrap;
}
.pillnav__cta:active { box-shadow: inset 2px 2px 0 0 rgba(0, 0, 0, 0.28); }
.pillnav__cta:hover { transform: translateY(-1px); }

/* letter-roll hover (gamut signature) — scoped to the nav.
   height 1em + line-height 1 so the duplicate row stays clipped
   inside the flex-centred CTA */
.pillnav .rl { display: inline-block; overflow: hidden; height: 1em; vertical-align: bottom; }
.pillnav .rl i {
  display: block; font-style: normal; line-height: 1;
  transition: transform 0.34s var(--tac-ease);
  transition-delay: calc(var(--i) * 16ms);
}
.pillnav .rl i::after { content: attr(data-c); display: block; }
.pillnav [data-roll]:hover .rl i, .pillnav [data-roll]:focus-visible .rl i { transform: translateY(-50%); }

/* ---------- mobile /menu ---------- */
.mmenu-btn {
  display: none; font-family: var(--tac-mono); font-size: 0.68rem; text-transform: uppercase;
  letter-spacing: 0.08em; background: none; border: 0; color: var(--tac-ink); cursor: pointer; padding: 8px;
}
.mmenu {
  position: absolute; top: calc(100% + 12px); left: 50%; transform: translateX(-50%) translateY(8px);
  width: min(340px, calc(100vw - 40px)); padding: 10px;
  background: rgba(255, 255, 255, 0.97); border: 1px solid var(--tac-line); border-radius: 14px;
  box-shadow: 0 22px 60px rgba(18, 18, 18, 0.14);
  opacity: 0; pointer-events: none; transition: opacity 0.3s var(--tac-ease), transform 0.3s var(--tac-ease);
}
.mmenu.open { opacity: 1; pointer-events: auto; transform: translateX(-50%) translateY(0); }
.mmenu__group { display: block; font-family: var(--tac-mono); font-size: 0.58rem; text-transform: uppercase; letter-spacing: 0.14em; color: var(--tac-ink-3); padding: 10px 12px 4px; }
.mmenu a { display: block; padding: 9px 12px; border-radius: 8px; text-decoration: none; font-family: var(--tac-mono); font-size: 0.76rem; color: var(--tac-ink); }
.mmenu a:hover { background: var(--tac-blue-08); color: var(--tac-blue); }

@media (max-width: 960px) {
  .pillnav__links { display: none; }
  .mmenu-btn { display: block; margin-left: auto; }
  .pillnav__cta { margin-left: 0; }
}