/* ==========================================================================
   Navigation Component
   Header navigation, mobile menu, and hamburger button
   ========================================================================== */

/* --------------------------------------------------------------------------
   Site Navigation Wrapper
   Fixed header with blur backdrop
   -------------------------------------------------------------------------- */
.site-nav-wrap {
  position: fixed;
  left: 0;
  right: 0;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  background-color: rgba(249, 248, 246, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.site-nav-wrap__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 110rem;
  margin-left: auto;
  margin-right: auto;
  padding: 1rem 1.5rem;
}

@media (min-width: 1024px) {
  .site-nav-wrap__inner {
    padding: 1.5rem 5vw;
  }
}

/* --------------------------------------------------------------------------
   Primary Navigation List
   -------------------------------------------------------------------------- */
#primary-nav {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 3rem;
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-size: 0.7rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  /* Mobile First: hidden by default */
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

#primary-nav > li {
  position: relative;
}

/* --------------------------------------------------------------------------
   Brand Link
   -------------------------------------------------------------------------- */
.brand-link {
  font-family: var(--font-display);
  font-size: 1.5rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text-primary);
  transition: color 0.3s ease;
  display: flex;
  align-items: center;
}

.brand-link img {
  transition: filter 0.3s ease;
}

body.nav-open .brand-link img {
  filter: brightness(0) invert(1);
}

/* --------------------------------------------------------------------------
   Nav Toggle Button (Hamburger)
   -------------------------------------------------------------------------- */
#nav-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 100;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 999px;
  transition: color 0.3s ease, background-color 0.3s ease;
}

/* Hide hamburger on desktop */
@media (min-width: 900px) {
  #nav-toggle {
    display: none;
  }
}

#nav-toggle .hamburger {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

#nav-toggle .hamburger::before,
#nav-toggle .hamburger::after,
#nav-toggle .hamburger span {
  content: '';
  position: absolute;
  display: block;
  width: 22px;
  height: 2px;
  border-radius: 999px;
  background-color: currentColor;
  transition: transform 0.4s ease, opacity 0.3s ease;
}

#nav-toggle .hamburger::before {
  transform: translateY(-6px);
}

#nav-toggle .hamburger::after {
  transform: translateY(6px);
}

/* Hamburger to X transition */
#nav-toggle[aria-expanded='true'] .hamburger span {
  opacity: 0;
}

#nav-toggle[aria-expanded='true'] .hamburger::before {
  transform: rotate(45deg);
}

#nav-toggle[aria-expanded='true'] .hamburger::after {
  transform: rotate(-45deg);
}

/* --------------------------------------------------------------------------
   Mobile Navigation (max-width: 899px)
   -------------------------------------------------------------------------- */
@media (max-width: 899px) {
  #primary-nav {
    position: fixed;
    inset: 0;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    gap: 2.5rem;
    padding: clamp(5rem, 10vw, 7rem) 2rem 3rem;
    width: 100%;
    min-height: 100vh;
    height: 100vh;
    height: 100dvh;
    max-width: none;
    margin: 0;
    background-color: var(--color-background);
    opacity: 0;
    transform: translateY(-24px);
    transition: opacity 0.4s ease, transform 0.4s ease, visibility 0s linear 0.4s;
    overflow-y: auto;
    overflow-x: hidden;
    overscroll-behavior: contain;
    scrollbar-width: thin;
    z-index: 70;
    pointer-events: none;
    visibility: hidden;
  }

  #primary-nav::-webkit-scrollbar {
    width: 6px;
  }

  #primary-nav::-webkit-scrollbar-thumb {
    background-color: rgba(249, 248, 246, 0.35);
    border-radius: 3px;
  }

  #primary-nav a {
    font-size: 1.1rem;
    color: #1a1a1a;
    letter-spacing: 0.32em;
    text-align: center;
    display: inline-block;
    transition: transform 0.3s ease, opacity 0.3s ease;
    opacity: 0;
    transform: translateY(10px);
  }

  /* Body state when nav is open */
  body.nav-open {
    overflow: hidden;
  }

  body.nav-open #primary-nav {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
    visibility: visible;
    transition: opacity 0.4s ease, transform 0.4s ease, visibility 0s linear 0s;
  }

  body.nav-open #primary-nav a {
    opacity: 1;
    transform: translateY(0);
  }

  body.nav-open #primary-nav-wrap {
    background: rgba(26, 26, 26, 0.94);
    border-color: transparent;
  }

  body.nav-open #nav-toggle {
    color: #1a1a1a;
    background-color: #f2f2f2;
  }
}

/* --------------------------------------------------------------------------
   Desktop Navigation (min-width: 900px)
   -------------------------------------------------------------------------- */
@media (min-width: 900px) {
  #primary-nav {
    position: static;
    flex-direction: row;
    gap: 1rem;
    padding: 0;
    width: auto;
    height: auto;
    max-width: none;
    background: transparent;
    opacity: 1;
    transform: none;
    overflow: visible;
    pointer-events: auto;
    visibility: visible;
  }

  #primary-nav a {
    opacity: 1;
    transform: none;
    transition: color 0.3s ease;
    white-space: nowrap;
  }
}

@media (min-width: 950px) {
  #primary-nav {
    gap: 1.5rem;
  }
}

@media (min-width: 1200px) {
  #primary-nav {
    gap: 3rem;
  }
}

/* --------------------------------------------------------------------------
   Ghost Button
   -------------------------------------------------------------------------- */
.btn-ghost {
  border: 1px solid #083B10;
  padding: 12px 32px;
  transition: all 0.3s ease;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.85rem;
}

.btn-ghost:hover {
  background-color: #083B10;
  color: #F9F8F6;
}

/* --------------------------------------------------------------------------
   Page Transition Animation
   -------------------------------------------------------------------------- */
.page-transition {
  animation: fadeIn 0.6s ease-in-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}