/* ==========================================================================
   Navigation — header, transparent state, nav, mobile menu, auth modal
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: background var(--ease), border-color var(--ease), box-shadow var(--ease);
}

/* Transparent header (homepage, before scroll) */
.home .site-header.header-transparent {
  background: transparent;
  border-bottom-color: transparent;
  box-shadow: none;
  position: fixed;
  width: 100%;
}
.home .site-header.header-transparent .site-logo__text { color: var(--color-white); }
.home .site-header.header-transparent .nav-menu a      { color: rgba(255,255,255,.85); }
.home .site-header.header-transparent .nav-menu a:hover{ color: var(--color-white); background: rgba(255,255,255,.1); }
.home .site-header.header-transparent .btn--outline    { color: var(--color-white); border-color: rgba(255,255,255,.5); }
.home .site-header.header-transparent .btn--outline:hover { background: rgba(255,255,255,.15); }
.home .site-header.header-transparent .btn--primary    { background: var(--color-accent); border-color: var(--color-accent); color: var(--color-dark); }
.home .site-header.header-transparent .hamburger__line { background: var(--color-white); }
.home .site-header.header-transparent .user-menu__trigger { color: rgba(255,255,255,.85); }

/* After scroll — solid white */
.home .site-header.header-scrolled {
  background: var(--color-white);
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-md);
}
.home .site-header.header-scrolled .site-logo__text { color: var(--color-primary); }
.home .site-header.header-scrolled .nav-menu a      { color: var(--color-dark-2); }
.home .site-header.header-scrolled .btn--outline    { color: var(--color-primary); border-color: var(--color-primary); }
.home .site-header.header-scrolled .btn--primary    { background: var(--color-primary); border-color: var(--color-primary); color: var(--color-white); }
.home .site-header.header-scrolled .hamburger__line { background: var(--color-dark); }

/* Offset hero for fixed transparent header */
.home .hero { padding-top: var(--header-height); }

.header-inner {
  display: flex;
  align-items: center;
  gap: var(--sp-6);
  height: var(--header-height);
}

/* Logo */
.site-logo { display: flex; align-items: center; flex-shrink: 0; }
.site-logo img { height: 42px; width: auto; }
.site-logo__text {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.03em;
  transition: color var(--ease);
}

/* Primary nav */
.primary-nav { flex: 1; }
.nav-menu { display: flex; align-items: center; gap: 2px; }
.nav-menu li { position: relative; }
.nav-menu a {
  display: block;
  padding: var(--sp-2) var(--sp-3);
  font-family: var(--font);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-dark-2);
  border-radius: var(--radius-sm);
  letter-spacing: 0.02em;
  transition: background var(--ease), color var(--ease);
}
.nav-menu a:hover,
.nav-menu .current-menu-item > a,
.nav-menu .current-menu-ancestor > a {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

/* Dropdown */
.nav-menu .sub-menu {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  min-width: 210px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  padding: var(--sp-2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: all var(--ease);
  z-index: 10;
}
.nav-menu li:hover > .sub-menu,
.nav-menu li:focus-within > .sub-menu {
  opacity: 1; visibility: visible; transform: translateY(0);
}
.nav-menu .sub-menu a { border-radius: var(--radius-sm); color: var(--color-dark); }

/* Header actions */
.header-actions { display: flex; align-items: center; gap: var(--sp-3); margin-left: auto; }

/* User menu */
.user-menu { position: relative; }
.user-menu__trigger {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-dark-2);
  transition: background var(--ease), color var(--ease);
}
.user-menu__trigger:hover { background: var(--color-primary-light); }
.user-menu__avatar { border-radius: var(--radius-full); object-fit: cover; flex-shrink: 0; }
.user-menu__caret { font-size: 9px; color: var(--color-grey-light); }
.user-menu__dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 190px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: var(--sp-2);
  opacity: 0; visibility: hidden; transform: translateY(4px);
  transition: all var(--ease);
  z-index: 10;
}
.user-menu:hover .user-menu__dropdown,
.user-menu__trigger[aria-expanded="true"] + .user-menu__dropdown {
  opacity: 1; visibility: visible; transform: translateY(0);
}
.user-menu__dropdown li a {
  display: block;
  padding: var(--sp-2) var(--sp-3);
  font-size: var(--text-sm);
  color: var(--color-dark);
  border-radius: var(--radius-sm);
  transition: background var(--ease);
}
.user-menu__dropdown li a:hover { background: var(--color-primary-light); color: var(--color-primary); }
.user-menu__dropdown .divider { height: 1px; background: var(--color-border); margin: var(--sp-2) 0; }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 38px; height: 38px;
  padding: var(--sp-2);
  border-radius: var(--radius-sm);
  transition: background var(--ease);
}
.hamburger:hover { background: var(--color-primary-light); }
.hamburger__line {
  display: block; height: 2px;
  background: var(--color-dark);
  border-radius: 2px;
  transition: transform var(--ease), opacity var(--ease);
}
.hamburger[aria-expanded="true"] .hamburger__line:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger[aria-expanded="true"] .hamburger__line:nth-child(2) { opacity: 0; }
.hamburger[aria-expanded="true"] .hamburger__line:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile nav */
@media (max-width: 768px) {
  .hamburger { display: flex; }
  .primary-nav {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0; right: 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    padding: var(--sp-4) var(--container-px);
    z-index: 99;
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
  }
  .home .primary-nav { top: var(--header-height); }
  .primary-nav.is-open { display: block; }
  .nav-menu { flex-direction: column; align-items: stretch; gap: var(--sp-1); }
  .nav-menu a { padding: var(--sp-3); }
  .nav-menu .sub-menu {
    position: static; opacity: 1; visibility: visible; transform: none;
    box-shadow: none; border: none;
    border-left: 3px solid var(--color-primary-light);
    border-radius: 0; margin-left: var(--sp-4);
    padding: var(--sp-1); display: none;
  }
  .nav-menu li.is-open > .sub-menu { display: block; }
}

/* Auth modal */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.6);
  display: flex; align-items: center; justify-content: center;
  padding: var(--sp-4); z-index: 1000;
  backdrop-filter: blur(4px);
}
.modal-overlay[hidden] { display: none; }
.modal {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--sp-8);
  width: 100%; max-width: 440px;
  position: relative;
  box-shadow: var(--shadow-xl);
  animation: modal-in .2s ease;
}
@keyframes modal-in {
  from { opacity: 0; transform: scale(.95) translateY(10px); }
  to   { opacity: 1; transform: scale(1)  translateY(0);     }
}
.modal__close {
  position: absolute; top: var(--sp-4); right: var(--sp-4);
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-full);
  font-size: var(--text-xl); color: var(--color-grey);
  transition: background var(--ease);
}
.modal__close:hover { background: var(--color-bg); }
.modal__tabs { display: flex; margin-bottom: var(--sp-6); border-bottom: 2px solid var(--color-border); }
.modal__tab {
  flex: 1; padding: var(--sp-3) var(--sp-4);
  font-family: var(--font); font-size: var(--text-sm); font-weight: 700;
  color: var(--color-grey);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  text-transform: uppercase; letter-spacing: 0.06em;
  transition: color var(--ease), border-color var(--ease);
}
.modal__tab--active, .modal__tab[aria-selected="true"] { color: var(--color-primary); border-bottom-color: var(--color-primary); }
.modal__title { font-size: var(--text-2xl); margin-bottom: var(--sp-6); }
.modal__panel[hidden] { display: none; }
.auth-form .btn { margin-top: var(--sp-2); }

/* Social icons */
.footer-social, .listing-social { display: flex; gap: var(--sp-3); flex-wrap: wrap; margin-top: var(--sp-5); }
.social-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; border-radius: var(--radius-full);
  background: rgba(255,255,255,.1); color: var(--color-white);
  font-size: var(--text-xs); font-weight: 700;
  transition: background var(--ease), transform var(--ease);
  text-decoration: none;
}
.social-icon:hover { background: var(--color-accent); color: var(--color-dark); transform: translateY(-2px); }
.listing-social .social-icon { background: var(--color-primary-light); color: var(--color-primary); }
.listing-social .social-icon:hover { background: var(--color-primary); color: var(--color-white); }
.social-icon__glyph { font-style: normal; font-size: 11px; font-weight: 900; }
.social-icon__glyph--facebook::before  { content: 'f'; }
.social-icon__glyph--instagram::before { content: 'IG'; font-size: 9px; }
.social-icon__glyph--twitter::before   { content: 'x'; }
.social-icon__glyph--linkedin::before  { content: 'in'; font-size: 9px; }
.social-icon__glyph--youtube::before   { content: 'YT'; font-size: 9px; }
.social-icon__glyph--tiktok::before    { content: 'TT'; font-size: 9px; }