/* ============================================
   NAVIGATION
   ============================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 60px;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--side-pad);
  transition: background 0.5s ease, box-shadow 0.5s ease;
}

.nav.is-scrolled {
  background: rgba(245, 240, 235, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 rgba(44, 44, 44, 0.06);
}

.nav__logo {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 300;
  letter-spacing: 0.05em;
  color: var(--warm-ivory);
  transition: color 0.5s ease;
  z-index: 102;
}

.nav.is-scrolled .nav__logo {
  color: var(--charcoal);
}

/* Desktop links — centered */
.nav__links {
  display: none;
  gap: 36px;
  align-items: center;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.nav__links a {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--warm-ivory);
  transition: color 0.3s ease;
  position: relative;
}

.nav.is-scrolled .nav__links a {
  color: var(--charcoal);
}

.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--gold);
  transition: width 0.4s var(--ease-smooth);
}

.nav__links a:hover::after {
  width: 100%;
}

.nav__links a:hover {
  color: var(--gold);
}

/* Desktop CTA */
.nav__cta {
  display: none;
  padding: 10px 28px;
  border: 1px solid rgba(245, 240, 235, 0.4);
  color: var(--warm-ivory);
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.4s var(--ease-out);
}

.nav.is-scrolled .nav__cta {
  border-color: var(--charcoal);
  color: var(--charcoal);
}

.nav__cta:hover {
  background: var(--gold);
  border-color: var(--gold);
  color: #fff;
}

/* ---- Hamburger ---- */
.nav__hamburger {
  width: 28px;
  height: 20px;
  cursor: pointer;
  z-index: 102;
  position: relative;
}

.nav__hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--warm-ivory);
  position: absolute;
  left: 0;
  transition: all 0.4s var(--ease-smooth);
  transform-origin: center;
}

.nav__hamburger span:first-child {
  top: 2px;
}

.nav__hamburger span:last-child {
  bottom: 2px;
  width: 60%;
  left: auto;
  right: 0;
}

.nav.is-scrolled .nav__hamburger span {
  background: var(--charcoal);
}

/* Open state: X shape */
.nav__hamburger.is-open span {
  background: var(--charcoal);
}

.nav__hamburger.is-open span:first-child {
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
}

.nav__hamburger.is-open span:last-child {
  bottom: auto;
  top: 50%;
  width: 100%;
  left: 0;
  right: auto;
  transform: translateY(-50%) rotate(-45deg);
}

/* ---- Mobile Menu Overlay ---- */
.nav__overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  height: 100dvh;
  background: var(--warm-ivory);
  z-index: 101;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 28px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.nav__overlay.is-open {
  opacity: 1;
  visibility: visible;
}

/* Close X inside overlay */
.nav__overlay-close {
  position: absolute;
  top: 18px;
  right: var(--side-pad);
  width: 28px;
  height: 28px;
  cursor: pointer;
  z-index: 103;
}

.nav__overlay-close span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--charcoal);
  position: absolute;
  top: 50%;
  left: 0;
}

.nav__overlay-close span:first-child {
  transform: translateY(-50%) rotate(45deg);
}

.nav__overlay-close span:last-child {
  transform: translateY(-50%) rotate(-45deg);
}

.nav__overlay a {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 300;
  color: var(--charcoal);
  letter-spacing: 0.02em;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.4s ease, transform 0.4s var(--ease-smooth), color 0.3s ease;
}

.nav__overlay.is-open a {
  opacity: 1;
  transform: translateY(0);
}

.nav__overlay a:hover {
  color: var(--gold);
}

/* Stagger */
.nav__overlay a:nth-child(1) { transition-delay: 0.1s; }
.nav__overlay a:nth-child(2) { transition-delay: 0.15s; }
.nav__overlay a:nth-child(3) { transition-delay: 0.2s; }
.nav__overlay a:nth-child(4) { transition-delay: 0.25s; }
.nav__overlay a:nth-child(5) { transition-delay: 0.3s; }

.nav__overlay-cta {
  margin-top: 24px;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.4s ease 0.4s, transform 0.4s var(--ease-smooth) 0.4s;
}

.nav__overlay.is-open .nav__overlay-cta {
  opacity: 1;
  transform: translateY(0);
}

/* ---- Desktop ---- */
@media (min-width: 768px) {
  .nav {
    height: 72px;
    padding: 0 40px;
  }

  .nav__logo {
    font-size: 20px;
  }

  .nav__links {
    display: flex;
  }

  .nav__cta {
    display: inline-block;
  }

  .nav__hamburger {
    display: none;
  }
}