/* ==========================================================================
   NavMinimal
   Transparent default → semi-transparent dark on scroll.
   Mobile: hamburger → slide-in panel.
   ========================================================================== */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-6) var(--space-8);
  background: transparent;
  transition: background var(--duration-normal) var(--ease-in-out),
              padding var(--duration-normal) var(--ease-in-out);
}

/* Scrolled state */
.nav--scrolled {
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding-block: var(--space-4);
}

/* --------------------------------------------------------------------------
   Logo
   -------------------------------------------------------------------------- */
.nav__logo {
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 400;
  letter-spacing: var(--tracking-wider);
  color: var(--color-white);
  text-transform: uppercase;
  line-height: 1;
  transition: opacity var(--duration-fast);
}

.nav__logo:hover {
  opacity: 0.7;
}

/* --------------------------------------------------------------------------
   Desktop Links
   -------------------------------------------------------------------------- */
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav__link {
  font-family: var(--font-body);
  font-size: var(--text-caption);
  font-weight: 400;
  letter-spacing: var(--tracking-wider);
  color: var(--color-white);
  text-transform: uppercase;
  opacity: 0.85;
  transition: opacity var(--duration-fast);
}

.nav__link:hover {
  opacity: 1;
}

.nav__link--active {
  opacity: 1;
  position: relative;
}

.nav__link--active::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--color-white);
  opacity: 0.6;
}

/* Cart icon link */
.nav__cart {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  opacity: 0.85;
  transition: opacity var(--duration-fast);
}

.nav__cart:hover {
  opacity: 1;
}

.nav__cart svg {
  width: 20px;
  height: 20px;
}

/* --------------------------------------------------------------------------
   Mobile: Hamburger Button
   -------------------------------------------------------------------------- */
.nav__menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  margin-right: calc(-1 * var(--space-2));
}

.nav__menu-btn span {
  display: block;
  width: 22px;
  height: 1px;
  background: var(--color-white);
  transition: transform var(--duration-normal) var(--ease-in-out),
              opacity var(--duration-normal) var(--ease-in-out);
  transform-origin: center;
}

/* Open state — X icon */
.nav__menu-btn[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav__menu-btn[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav__menu-btn[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* --------------------------------------------------------------------------
   Mobile: Slide-in Panel
   -------------------------------------------------------------------------- */
.nav__panel {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  background: var(--color-black);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: var(--space-8);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-normal) var(--ease-in-out);
}

.nav__panel--open {
  opacity: 1;
  pointer-events: all;
}

.nav__panel-link {
  font-family: var(--font-display);
  font-size: var(--text-display);
  font-weight: 300;
  letter-spacing: var(--tracking-tight);
  color: var(--color-white);
  opacity: 0.85;
  transition: opacity var(--duration-fast);
}

.nav__panel-link:hover {
  opacity: 1;
}

.nav__panel-close {
  position: absolute;
  top: var(--space-6);
  right: var(--space-8);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.7;
  transition: opacity var(--duration-fast);
}

.nav__panel-close:hover {
  opacity: 1;
}

/* --------------------------------------------------------------------------
   Responsive — Mobile breakpoint
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
  .nav {
    padding: var(--space-5) var(--space-6);
  }

  .nav--scrolled {
    padding-block: var(--space-4);
  }

  .nav__links {
    display: none;
  }

  .nav__menu-btn {
    display: flex;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .nav,
  .nav__logo,
  .nav__link,
  .nav__cart,
  .nav__menu-btn span,
  .nav__panel {
    transition: none;
  }
}