/* ─────────────────────────────────────────────────────────────
   nav.css — sticky navigation bar & mobile menu
   ───────────────────────────────────────────────────────────── */

.nav {
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  background: oklch(99% 0.002 250 / 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: var(--rule-hairline);
  transition: box-shadow var(--dur-normal) var(--ease-out);
}
.nav.scrolled { box-shadow: var(--shadow-sm); }

.nav__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-4) var(--space-8);
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

/* Brand */
.nav__brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
  text-decoration: none;
}
.nav__logo     { width: 32px; height: 32px; flex-shrink: 0; }
.nav__wordmark {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  font-style: normal;
  color: var(--color-accent);
  letter-spacing: var(--tracking-tight);
}

/* Desktop links */
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  margin-left: auto;
}
.nav__link {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-ink-2);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease-out);
  white-space: nowrap;
}
.nav__link:hover         { color: var(--color-accent); }
.nav__link:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 4px; border-radius: 3px; }

/* CTA */
.nav__actions { display: flex; align-items: center; gap: var(--space-3); flex-shrink: 0; }

/* Hamburger */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  margin-left: auto;
  background: none;
  border: none;
  cursor: pointer;
}
.nav__hamburger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--color-accent);
  border-radius: 2px;
  transition: transform var(--dur-normal) var(--ease-out), opacity var(--dur-fast) var(--ease-out);
}
.nav__hamburger:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 4px; border-radius: 4px; }

/* Mobile menu */
.nav__mobile {
  display: none;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-4) var(--space-8) var(--space-6);
  border-top: var(--rule-hairline);
  background: var(--color-paper);
}
.nav__mobile.open { display: flex; }
.nav__mobile-link {
  font-family: var(--font-display);
  font-size: var(--text-md);
  font-weight: 500;
  color: var(--color-ink-2);
  padding: var(--space-3) 0;
  text-decoration: none;
  border-bottom: var(--rule-hairline);
}
.nav__mobile-link:hover { color: var(--color-accent); }
.nav__mobile-cta        { margin-top: var(--space-4); align-self: flex-start; }