/* nav.css — Fixed floating navigation with glassmorphism */

.nav {
  position: fixed;
  top: 1rem;
  left: 1rem;
  right: 1rem;
  z-index: 50;
  border-radius: var(--radius-nav);
  background: rgba(248, 247, 244, 0);
  backdrop-filter: blur(0px);
  -webkit-backdrop-filter: blur(0px);
  border: 1px solid transparent;
  transition:
    background var(--transition-medium),
    backdrop-filter var(--transition-medium),
    border-color var(--transition-medium);
}

.nav.is-scrolled {
  background: rgba(248, 247, 244, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-color: var(--whisper-border);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.6), 0 4px 24px rgba(26, 26, 46, 0.06);
}

.nav__inner {
  max-width: var(--container-max);
  margin-inline: auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

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

.nav__links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav__links a {
  font-family: var(--font-body);
  font-size: var(--text-caption);
  font-weight: 500;
  color: var(--text-mid);
  letter-spacing: 0.01em;
  transition: color var(--transition-fast);
}

@media (hover: hover) and (pointer: fine) {
  .nav__links a:hover {
    color: var(--text-dark);
  }
}

.nav__cta {
  font-family: var(--font-display);
  font-size: var(--text-caption);
  font-weight: 600;
  color: white;
  background: var(--violet);
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-button);
  transition: background var(--transition-fast), transform 100ms ease;
  white-space: nowrap;
}

@media (hover: hover) and (pointer: fine) {
  .nav__cta:hover {
    background: var(--violet-light);
    color: white;
  }
}

.nav__cta:active {
  transform: scale(0.97);
}

/* ── Hamburger (mobile only) ── */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
  min-width: 44px;
  min-height: 44px;
  justify-content: center;
  align-items: center;
}

.nav__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-dark);
  border-radius: 1px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav__hamburger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav__hamburger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav__hamburger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Mobile nav ── */
@media (max-width: 768px) {
  .nav__links,
  .nav__cta {
    display: none;
  }

  .nav__hamburger {
    display: flex;
  }

  .nav__links.is-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(248, 247, 244, 0.97);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 1.5rem;
    border-radius: 0 0 var(--radius-nav) var(--radius-nav);
    border: 1px solid var(--whisper-border);
    border-top: none;
    gap: 0;
  }

  .nav__links.is-open li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--whisper-border);
  }

  .nav__links.is-open li:last-child {
    border-bottom: none;
  }

  .nav__cta.is-open {
    display: inline-block;
    text-align: center;
    margin-top: 1rem;
    position: absolute;
    top: calc(100% + 12rem);
    left: 1.5rem;
    right: 1.5rem;
  }
}