/* ============================================
   GNB Navigation
   ============================================ */

.westone-gnb {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-gnb);
  padding: 20px var(--container-padding);
  transition: background var(--transition-fast), padding var(--transition-fast);
}

.westone-gnb.scrolled {
  background: rgba(0, 0, 0, 0.9);
  backdrop-filter: blur(10px);
  padding: 12px var(--container-padding);
}

.westone-gnb__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-max);
  margin: 0 auto;
}

.westone-gnb__logo {
  display: block;
  flex-shrink: 0;
}

.westone-gnb__logo img {
  height: 36px;
  width: auto;
  transition: opacity var(--transition-fast);
}

.westone-gnb__nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.westone-gnb__nav a {
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-text-white);
  position: relative;
  padding: 8px 0;
}

.westone-gnb__nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition-fast);
}

.westone-gnb__nav a:hover,
.westone-gnb__nav a.active {
  color: var(--color-primary);
}

.westone-gnb__nav a:hover::after,
.westone-gnb__nav a.active::after {
  width: 100%;
}

.westone-gnb__menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  gap: 6px;
  z-index: calc(var(--z-menu) + 1);
}

.westone-gnb__menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-white);
  transition: all var(--transition-fast);
}

.westone-gnb__menu-btn:hover span {
  background: var(--color-primary);
}

/* Fullscreen Menu */
.fullscreen-menu {
  position: fixed;
  inset: 0;
  z-index: var(--z-menu);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s ease, visibility 0.4s ease;
}

.fullscreen-menu.open {
  opacity: 1;
  visibility: visible;
}

.fullscreen-menu__bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(8, 8, 8, 0.96), rgba(26, 23, 20, 0.96));
}

.fullscreen-menu__bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
}

.fullscreen-menu__content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  padding: 60px;
}

.fullscreen-menu__close {
  position: absolute;
  top: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-fast);
}

.fullscreen-menu__close:hover {
  transform: rotate(90deg);
}

.fullscreen-menu__close span {
  position: absolute;
  width: 28px;
  height: 2px;
  background: var(--color-text-white);
}

.fullscreen-menu__close span:first-child {
  transform: rotate(45deg);
}

.fullscreen-menu__close span:last-child {
  transform: rotate(-45deg);
}

.fullscreen-menu__nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px 80px;
  text-align: center;
}

.fullscreen-menu__nav a {
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 42px);
  font-weight: 500;
  color: var(--color-text-white);
  transition: all var(--transition-fast);
  padding: 8px 0;
}

.fullscreen-menu__nav a:hover {
  color: var(--color-primary);
  transform: translateX(5px);
}

/* Responsive */
@media (max-width: 1024px) {
  .westone-gnb__nav {
    display: none;
  }

  .westone-gnb__menu-btn {
    display: flex;
  }

  .fullscreen-menu__nav {
    grid-template-columns: repeat(2, 1fr);
    gap: 30px 50px;
  }
}

@media (max-width: 768px) {
  .fullscreen-menu__nav {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .fullscreen-menu__nav a {
    font-size: 28px;
  }
}