/* nav.css — navigation bar styles */

/* ── Nav shell ───────────────────────────────────────── */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  height: 64px;
  background: rgba(0, 31, 63, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.nav__inner {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  height: 64px;
}

/* ── Logo ────────────────────────────────────────────── */

.nav__logo {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: var(--color-teal);
  letter-spacing: -0.01em;
  flex-shrink: 0;
  text-decoration: none;
}

.nav__logo:hover {
  opacity: 0.85;
}

.nav__logo img {
  height: 36px;
  width: auto;
  display: block;
}

/* ── Desktop links ───────────────────────────────────── */

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  flex: 1;
}

.nav__link {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.nav__link:hover {
  color: var(--color-text);
}

/* ── Desktop CTA ─────────────────────────────────────── */

.nav__actions {
  margin-left: auto;
  flex-shrink: 0;
}

/* ── Hamburger button ────────────────────────────────── */

.nav__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: transparent;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  margin-left: auto;
  flex-shrink: 0;
}

.nav__hamburger:hover {
  background: rgba(255, 255, 255, 0.06);
}

.nav__hamburger-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

/* Animated X state */
.nav__hamburger[aria-expanded="true"] .nav__hamburger-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav__hamburger[aria-expanded="true"] .nav__hamburger-bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.nav__hamburger[aria-expanded="true"] .nav__hamburger-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Mobile dropdown menu ────────────────────────────── */

.nav__mobile-menu {
  position: absolute;
  top: 64px;
  left: 0;
  right: 0;
  background: rgba(0, 26, 51, 0.98);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-4) 0;

  /* Hidden by default */
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
  transition:
    max-height var(--transition-normal),
    opacity var(--transition-normal);
}

.nav__mobile-menu.is-open {
  max-height: 400px;
  opacity: 1;
  pointer-events: all;
}

.nav__mobile-links {
  display: flex;
  flex-direction: column;
  padding: 0 var(--space-6);
}

.nav__mobile-link {
  display: block;
  padding: var(--space-4) 0;
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-border);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.nav__mobile-link:hover {
  color: var(--color-text);
}

.nav__mobile-link:last-child {
  border-bottom: none;
}

/* BUG-03 fix: Register Now button in mobile dropdown */
.nav__mobile-cta {
  padding: var(--space-5) var(--space-6) var(--space-2);
}

.nav__mobile-register {
  width: 100%;
  justify-content: center;
}

/* ── Responsive ──────────────────────────────────────── */

/* Desktop: show links + actions, hide hamburger */
@media (min-width: 900px) {
  .nav__hamburger {
    display: none;
  }

  .nav__mobile-menu {
    display: none !important;
  }

  .nav__links {
    display: flex;
  }

  .nav__actions {
    display: flex;
  }
}

/* Mobile: hide desktop links + actions, show hamburger */
@media (max-width: 899px) {
  .nav__links {
    display: none;
  }

  .nav__actions {
    display: none;
  }

  .nav__hamburger {
    display: flex;
  }
}